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Versions: 00 01 02 03                                                   
                                                           A. Valentine
Internet Draft                                           Hughes Network
                                                            Systems Ltd
Document: draft-ietf-ipcdn-dvbnetint-mib-03.txt           February 2001
Category: Standards Track


                  DVB Cable Network Interface Unit MIB
                  for EuroModem compliant Cable Modems


Status of this Memo

   This document is an Internet-Draft and is in full conformance with
   all provisions of Section 10 of RFC2026.

   Internet-Drafts are working documents of the Internet Engineering
   Task Force (IETF), its areas, and its working groups. Note that
   other groups may also distribute working documents as Internet-
   Drafts. Internet-Drafts are draft documents valid for a maximum of
   six months and may be updated, replaced, or obsoleted by other
   documents at any time. It is inappropriate to use Internet- Drafts
   as reference material or to cite them other than as "work in
   progress."

   The list of current Internet-Drafts can be accessed at
   http://www.ietf.org/ietf/1id-abstracts.txt

   The list of Internet-Draft Shadow Directories can be accessed at
   http://www.ietf.org/shadow.html.


Abstract

   This memo defines a portion of the Management Information Base (MIB)
   for use with network management protocols in the Internet community.
   In particular, it defines a basic set of managed objects for SNMP-
   based management of EuroModem v1.0 compliant Cable Network Interface
   Units.

   This memo specifies a MIB module in a manner that is compliant to
   the SNMP SMIv2[RFC2578][RFC2579][RFC2580].  The set of objects is
   consistent with the SNMP framework and existing SNMP standards.

   This memo is a product of the DVB/DAVIC interoperability consortium
   which has been adopted as a work item of the IPCDN WG.  Comments are
   solicited and should be addressed to the author.


1. The SNMP Management Framework

   The SNMP Management Framework presently consists of five major
   components:

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   o    An overall architecture, described in RFC 2571 [RFC2571].

   o    Mechanisms for describing and naming objects and events for the
        purpose of management. The first version of this Structure of
        Management Information (SMI) is called SMIv1 and described in
        STD 16, RFC 1155 [RFC1155], STD 16, RFC 1212 [RFC1212] and RFC
        1215 [RFC1215]. The second version, called SMIv2, is described
        in STD 58, RFC 2578 [RFC2578], STD 58, RFC 2579 [RFC2579] and
        STD 58, RFC 2580 [RFC2580].

   o    Message protocols for transferring management information. The
        first version of the SNMP message protocol is called SNMPv1 and
        described in STD 15, RFC 1157 [RFC1157]. A second version of
        the SNMP message protocol, which is not an Internet standards
        track protocol, is called SNMPv2c and described in RFC 1901
        [RFC1901] and RFC 1906 [RFC1906]. The third version of the
        message protocol is called SNMPv3 and described in RFC 1906
        [RFC1906], RFC 2572 [RFC2572] and RFC 2574 [RFC2574].

   o    Protocol operations for accessing management information. The
        first set of protocol operations and associated PDU formats is
        described in STD 15, RFC 1157 [RFC1157]. A second set of
        protocol operations and associated PDU formats is described in
        RFC 1905 [RFC1905].

   o    A set of fundamental applications described in RFC 2573
        [RFC2573] and the view-based access control mechanism described
        in RFC 2575 [RFC2575].

   A more detailed introduction to the current SNMP Management
   Framework can be found in RFC 2570 [RFC2570].

   Managed objects are accessed via a virtual information store, termed
   the Management Information Base or MIB. Objects in the MIB are
   defined using the mechanisms defined in the SMI.

   This memo specifies a MIB module that is compliant to the SMIv2. A
   MIB conforming to the SMIv1 can be produced through the appropriate
   translations. The resulting translated MIB must be semantically
   equivalent, except where objects or events are omitted because no
   translation is possible (use of Counter64). Some machine readable
   information in SMIv2 will be converted into textual descriptions in
   SMIv1 during the translation process. However, this loss of machine
   readable information is not considered to change the semantics of
   the MIB.


2. Glossary

   2.1. CATV

   Originally "Community Antenna Television", now used to refer to any

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   cable or hybrid fiber and cable system used to deliver video signals
   to a community.

   2.2. DAVIC

   Digital Audiovisual Council. International council for
   internetworking audio and video systems.

   2.3. Downstream

   The direction from the head-end towards the subscriber.

   2.4. DVB

   Digital Video Broadcasting. The DVB projects produce open and
   interoperable global standards for digital audio and video
   distribution.

   2.5. EuroModem.

   EuroModem.  A specification for an interoperable European Cable
   Modem [EUROM].

   2.6. Head-end

   The origination point in most cable systems of the subscriber video
   signals. Generally also the location of the INA equipment.

   2.7. INA

   Interactive Network Adapter.  This can act as a bridge or router in
   the cable head-end. It is responsible for controlling the bandwidth
   available to each NIU.

   2.8. NIU

   Network Interface Unit.  The unit is located at the subscriber
   premises and provides interactive services via the cable network.
   The NIU is under the control of the INA, but may request additional
   bandwidth/connections when required.  The NIU can act as a bridge or
   router.

   2.9. RF

   Radio Frequency.

   2.10. Upstream

   The direction from the subscriber towards the head-end.


3. Overview


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   This MIB provides a set of objects required for the management of
   EuroModem v1.0 compliant NIUs. The MIB specification is derived from
   the EuroModem v1.0 specification [EUROM].

   EuroModem NIUs are currently IPv4 only devices and may implement
   either SNMPv1 or SNMPv3.  This MIB is intended for NIUs that
   implement SNNMPv3 and IPv4, however all IP addresses have been
   represented as described in [RFC2851] to aid future migration to
   IPv6.

   The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT",
   "SHOULD", "SHOULD NOT", "RECOMMENDED",  "MAY", and "OPTIONAL" in
   this document are to be interpreted as described in [RFC2119].

   3.1.  Structure of the MIB

   This MIB is structured into nine groups:

   o    The dvbNiuSystem group extends the MIB-II 'system' group with
        objects needed for cable device system management.

   o    The dvbNiuSoftware group provides objects necessary for
        managing software images and upgrades via download.  See 3.2.1

   o    The dvbNiuDhcp group configures DHCP/BOOTP functionality
        provided by the NIU.  This group is optional.  See 3.2.2

   o    The dvbNiuEvent group provides control and logging for event
        reporting.  See 3.2.3

   o    The dvbNiuIpFilter group configures filters at the IP layer.
        The IP filter table is also used to provide support for anti
        spoofing, NAT, NAPT and TOS mapping. This group is optional.
        See 3.3

   o    The dvbNiuNat group provides basic configuration for the NIU
        NAT capability. This group is optional.

   o    The dvbNiuNapt group provides basic configuration for the NIU
        NAPT capability. This group is optional.

   o    The dvbNiuEthFilter group configures filters at the link layer.
        This is primarily intended for use when the NIU is performing
        Ethernet MAC bridging. This group is optional. See 3.3

   o    The dvbNiuCpe group provides control over which IP addresses
        may be used by customer premises equipment (e.g. PCs) serviced
        by a given NIU.  This provides anti-spoofing control at the
        point of origin for a large cable modem system.  This group is
        optional.  See 3.3

   3.2.  Management requirements


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   3.2.1. Software Management

   The NIU may download and store multiple software images.  The method
   for performing the download and using the image is as follows:


   o    set dvbNiuSwServer to the address of the TFTP server for
        software upgrades.

   o    set dvbNiuSwFilename to the filename including path of the
        image to download to the NIU.

   o    set dvbNiuDownloadSlot to the image slot on the NIU in which to
        place the downloaded image.  By default this will be set to the
        next free slot or the first slot designated as 'backup'.

   o    set dvbNiuSwAdminStatus to 'initUpgrd'.

   The status of the software download is obtained by reading
   dvbNiuSwAdminStatus.  If the NIU was unable to successfully perform
   the download, the status returned will reflect the cause.  Upon
   successful download the operator must configure dvbNiuSwVerTable if
   they wish to use the image as the boot or backup version.  Note only
   one image may be marked as bootable.

   3.2.2.  IP Address Assignment

   IP addresses may be assigned to NIU interfaces using static and
   dynamic assignments.  Objects are provided by the MIB to support
   both methods.  dvbNiuStaticIpTable provides objects to assign static
   IP addresses to NIU interfaces, where each interface may have
   multiple IP addresses.  An IP address assignment in the table MUST
   NOT be removed from the table if the destination address of the SNMP
   packet removing it is using that IP address.

   dvbNiuDhcpTable provides objects for managing dynamically assigned
   IP addresses via DHCP and BOOTP.  DHCP/BOOTP requests may be for NIU
   interfaces and relayed requests from the subscriber.  If an NIU
   interface does not have dynamic IP address allocation enabled then
   the IP address of the interface MUST be specified in
   dvbNiuStaticIpTable.

   Note:  The dvbNiuStaticIpTable should be used with care.  Where
   possible dvbNiuDhcpTable SHOULD be used in preference.  When an
   interface has both a static IP address assigned and dynamic
   addresses assignment enabled, the assigned dynamic address overrides
   all assignments for that interface in the dvbNiuStaticIpTable table.

   3.2.3.  Events and Traps

   This MIB provides control facilities for reporting events through
   traps and non-volatile logging.  If events are reported through


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   traps, the specified conventions must be followed.  Other means of
   event reporting are outside the scope of this document.

   Vendors SHOULD provide time-of-day clocks in NIUs to provide useful
   time stamping of events.  Where possible this SHOULD be synchronised
   with a central time source, this will aid fault finding when
   multiple equipment logs are being investigated.

   When dvbNiuEventPolicy is set to clearNow(4), the first entry in the
   log MUST be the date and time the log was cleared and the source IP
   address of the SNMP SET request which caused the log to be cleared.

   For each vendor-specific event that is reportable via TRAP, the
   vendor must create an enterprise-specific trap definition.  Trap
   definitions MUST include the event reason encoded as SnmpAdminString
   and should be defined as:

   trapName NOTIFICATION-TYPE
           OBJECTS {
               ifIndex,
               eventReason,
               other useful objects
           }
           STATUS      current
           DESCRIPTION
               "trap description"
           ::= Object Id

   Note that ifIndex is only included if the event or trap is interface
   related.

   An example (fake) vendor defined trap might be:

   xyzVendorRsUncorrHighMark NOTIFICATION-TYPE
           OBJECTS {
               eventReason,
               xyzRsUncorrCount
           }
           STATUS  current
           DESCRIPTION
                "Sent by a NIU when a configurable number of reed
                solomon uncorrectable errors occur during the sampling
                period (5 minutes).  Used to warn a management station
                of potential degradation of the HFC."
           ::= { xyzTraps 23 }

   In this example eventReason is a SnmpAdminString providing a human
   readable error message and xyzRsUncorrCount is a Integer32 which
   indicates the number of reed solomon uncorrectable errors during the
   epoch.

   3.2.4.  Trap Throttling


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   The NIU MUST provide support for trap message throttling as
   described below.  The network operator can employ message rate
   throttling or trap limiting by manipulating the appropriate MIB
   variables.

   3.2.4.1.  Trap rate throttling

   Network operators may employ either of two rate control methods.  In
   the first method, the device ceases to send traps when the rate
   exceeds the specified maximum message rate.  It resumes sending
   traps only if reactivated by a network management station request.

   In the second method, the device resumes sending traps when the rate
   falls below the specified maximum message rate.

   The network operator configures the specified maximum message rate
   by setting the measurement interval (in seconds), and the maximum
   number of traps to be transmitted within the measurement interval.
   The operator can query the operational throttling state (to
   determine whether traps are enabled or blocked by throttling) of the
   device, as well as query and set the administrative throttling state
   (to manage the rate control method) of the device.

   3.2.4.2.  Limiting the trap rate

   Network operators may wish to limit the number of traps sent by a
   device over a specified time period.  The device ceases to send
   traps when the number of traps exceeds the specified threshold.  It
   resumes sending traps only when the measurement interval has passed.

   The network operator defines the maximum number of traps he is
   willing to handle and sets the measurement interval to a large
   number (in hundredths of a second).  For this case, the
   administrative throttling state is set to stop at threshold which is
   the maximum number of traps.

   See "Techniques for Managing Asynchronously Generated Alerts"
   [RFC1224] for further information.


   3.3.  Protocol Filters

   The NIU MIB provides objects for both Ethernet and IP protocol
   filters.  The Ethernet protocol filter entries can be used to limit
   NIU forwarding to a restricted set of network-layer protocols (such
   as IP, IPX, NetBIOS, and Appletalk).

   The IP protocol filter entries can be used to restrict upstream or
   downstream traffic based on source and destination IP addresses,
   transport-layer protocols (such as TCP, UDP, and ICMP), and source
   and destination TCP/UDP port numbers.



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   In general, a NIU applies filters (or more properly, classifiers) in
   an order appropriate to the layering model. Specifically, the
   Ethernet layer filters are applied first, then the IP layer inbound
   filter and finally the IP layer outbound


               *******************
               * Ethernet Filter *
               *******************
                        |
                        v
               ********************
               * IP Anti-Spoofing *
               ********************
                        |
                        v
                ****************
                * IP Filter In *
                ****************
                        |
                        v
                *****************
                * IP Filter Out *
                *****************


   3.3.1.  Ethernet EtherType/SNAP/LLC Filters
   dvbNiuEthernetFilterTable

   The Ethernet (level-2) filters are contained in the
   dvbNiuEthernetFilterTable and are applied to level-2 frames entering
   the cable modem from either the DVB MAC interface or from one of the
   CPE (Ethernet or other Ethernet like) interfaces.  These filters are
   used to prohibit the processing and forwarding of certain types of
   level-2 traffic that may be disruptive to the network.  The filters,
   as currently specified, can be set to cause the NIU to either drop
   frames which match at least one filter, or to process a frame which
   matches at least filter.  Some examples of possible configurations
   would be to only permit IP (and ARP) traffic, or to drop NETBUEI
   traffic.

   3.3.2  IP Anti-Spoofing Filters - dvbNiuCpeTable

   IP Anti-spoofing filters are applied to packets entering the NIU
   from one of the CPE interfaces and are intended to prevent a
   subscriber from stealing or mis-using IP addresses that were not
   assigned to the subscriber.  If the filters are active (enabled),
   the source address    of the IP packet must match at least one IP
   address/range in this table or it is discarded without further
   processing.

   The table can be automatically populated where the first N different
   IP addresses seen from the CPE side of the NIU are used to

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   automatically populate the table.  The anti-spoofing filters are
   specified in the dvbNiuCpeTable and the policy for automatically
   creating filters in that table is controlled by dvbDevCpeEnroll and
   dvbNiuCpeMax as well as the network management agent.

   3.3.3.  IP Filtering - dvbNiuIpFilterTable

   The IP Filtering table acts as a classifier table.  Each row in the
   table describes a template against which IP packets are compared.
   The template includes source and destination addresses (and their
   associated masks), upper level protocol (e.g. TCP, UDP), source and
   destination port ranges, TOS and TOS mask. A row also contains
   interface and traffic direction match values which have to be
   considered in combination.  All columns of a particular row must
   match the appropriate fields in the packet, and must match the
   interface and direction items for the packet to result in a match to
   the packet.

   When classifying a packet, the table is scanned beginning with the
   lowest number filter.  If the agent finds a match, it performs the
   specified action.  If the matched filter has the continue bit set,
   the agent continues the scan possibly matching additional filters
   and performing the specified actions.  This allows the agent to take
   one set of actions for the 24.0.16/255.255.255.0 group and one set
   of actions for telnet packets to/from 24.0.16.30 and these sets of
   actions may not be mutually exclusive.

   Once a packet is matched, one of five actions happen based on the
   setting of dvbNiuFilterAction in the row.  The actions are:
   o    Discarded.  The packet is dropped, and no further processing is
        required.
   o    Accept.  The packet is accepted and processing of the packet
        continues.
   o    NAT.  The packet is to be accepted and have NAT applied.
        Processing of the packet continues using its new IP address.
   o    NAPT. The packet is to be accepted and have NAT applied.
        Processing of the packet continues using its new IP address and
        port number.
   o    TosMap.  Invokes the action of rewriting the TOS bits in the IP
        header based up the entry in dvbNiuIpTOSMapTable identified by
        dvbNiuIpFilterActionPtr.

   If dvbNiuIpFilterContinue is set to true, scanning of the table
   continues (unless the packet was discarded) and additional matches
   may result.


4. Definitions

   DVB-CABLE-NIU-MIB DEFINITIONS ::= BEGIN


   IMPORTS

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       MODULE-IDENTITY,
       OBJECT-TYPE,
       Counter32,
       Integer32,
       Unsigned32,
       experimental
           FROM SNMPv2-SMI
       InetAddress,
       InetAddressType
           FROM INET-ADDRESS-MIB
       RowStatus,
       DateAndTime,
       TruthValue,
       TEXTUAL-CONVENTION
           FROM SNMPv2-TC
       SnmpAdminString
           FROM SNMP-FRAMEWORK-MIB
       OBJECT-GROUP,
       MODULE-COMPLIANCE
           FROM SNMPv2-CONF
       InterfaceIndexOrZero,
       InterfaceIndex,
       ifIndex
           FROM IF-MIB;


   dvbDevice OBJECT IDENTIFIER ::= { experimental 110 }

   dvbNiu MODULE-IDENTITY
       LAST-UPDATED    "0102030000Z"
       ORGANIZATION    "IETF IPCDN Working Group
                        DVB/DAVIC Interoperability Consortium Technical
                        Working Group"
       CONTACT-INFO
              "        Andrew Valentine
               Postal: Engineering Design Centre
                       Hughes Network Systems Ltd
                       Saxon Street,
                       Linford Wood,
                       Milton Keynes.
                       MK14 6LD
                       ENGLAND

                  Tel: +44 1908 221122
                  Fax: +44 1908 221127
               E-mail: a.valentine@eu.hns.com

               IETF IPCDN Working Group
               General Discussion: ipcdn@ietf.org
               Subscribe: http://www.ietf.org/mailman/listinfo/ipcdn
               Archive: ftp://ftp.ietf.org/ietf-mail-archive/ipcdn
               Co-chairs: Richard Woundy, rwoundy@cisco.com
                          Andrew Valentine, a.valentine@eu.hns.com"

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       DESCRIPTION     "The MIB modules for NIUs that
                        conform to the EuroModem specification.  This
                        MIB assumes the NIU implements MIB-II RFC 1213"


       REVISION        "0102030000Z"
       DESCRIPTION     "Description for dvbNiuStaticIpStatus updated.
                        Description for dvbNiuCpeStatus updated."

       REVISION        "0101150000Z"
       DESCRIPTION     "ORGANIZATION and CONTACT-INFO updated.
                        dvbNiuCpeIpMax recommended default is now -1,
                        this is based on experience from another MIB
                        with a simlar table."


       REVISION        "0011010000Z"
       DESCRIPTION     "New dvbNiuMulticast object.  NAT descriptions
                        updated.  New and simpler to implement
                        Anti-spoofing table dvbNiuCpe,
                        and IP filter table modified to support this."

       REVISION        "0005150000Z"
       DESCRIPTION     "All objects of type IpAddress now consist of
                        two objects (See RFC2851).  Descriptions for
                        DHCP related objects have been fixed.  Indices
                        for some the tables have been modified to
                        improve use."

       REVISION        "0003050000Z"
       DESCRIPTION     "dvbNiuNmAccessTable has been removed as this
                        MIB is intended for SNMPv3"

       REVISION        "9912030000Z"
       DESCRIPTION     "All references to modem/Cdm have been replaced
                        with NIU.  Fixed group references in the
                        compliance section.  Removed DEFVAL clause from
                        scalar objects.  Corrected description of
                        dvbNiuEventTable.  dvbNiuDhcpTable has been
                        modified to support backup DHCP servers.
                        dvbNiuEuroloader object has been added to
                        enable or disable the EuroLoader.
                        dvbNiuOperStatus now only reflects the NIU
                        status, MAC status has been moved to the
                        interface MIB."

       REVISION        "9910010000Z"
       DESCRIPTION     "The mib has been modified to incorporate the
                        comments made by the WGT during the
                        27/28 Sep 1999 meeting.  The most significant
                        changes were to the DHCP group and to the

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                        management of traps.  Also some groups are now
                        optional."

       REVISION        "9907071500Z"
       DESCRIPTION     "The initial version of the MIB"
   ::= {dvbDevice 1}

   -- Sub divided dvbNiu into MIB objects and conformance

   dvbNiuMIBobjects OBJECT IDENTIFIER ::= {dvbNiu 1}
   dvbNiuMIBConform OBJECT IDENTIFIER ::= {dvbNiu 2}

   -- Define groups under dvbNiuMIBobjects

   dvbNiuSystem     OBJECT IDENTIFIER ::= {dvbNiuMIBobjects 1}
   dvbNiuSoftware   OBJECT IDENTIFIER ::= {dvbNiuMIBobjects 2}
   dvbNiuDhcp       OBJECT IDENTIFIER ::= {dvbNiuMIBobjects 3}
   dvbNiuEvent      OBJECT IDENTIFIER ::= {dvbNiuMIBobjects 4}
   dvbNiuIpFilter   OBJECT IDENTIFIER ::= {dvbNiuMIBobjects 5}
   dvbNiuNat        OBJECT IDENTIFIER ::= {dvbNiuMIBobjects 6}
   dvbNiuNapt       OBJECT IDENTIFIER ::= {dvbNiuMIBobjects 7}
   dvdNiuEthFilter  OBJECT IDENTIFIER ::= {dvbNiuMIBobjects 8}
   dvbNiuCpe        OBJECT IDENTIFIER ::= {dvbNiuMIBobjects 9}

   --Define identifiers under dvbNiuMIBConform

   dvbNiuCompliances  OBJECT IDENTIFIER ::= {dvbNiuMIBConform 1}
   dvbNiuGroups       OBJECT IDENTIFIER ::= {dvbNiuMIBConform 2}


   -- Definition of textual conventions

   DvbEventPriority ::= TEXTUAL-CONVENTION
       STATUS         current
       DESCRIPTION
              "This represents possible event priorities.  These are
               ordered from most (emergency) critical to least
               (debug)critical."
       SYNTAX       INTEGER {
                        emergency(1),
                        alert(2),
                        critical(3),
                        error(4),
                        warning(5),
                        notice(6),
                        information(7),
                        debug(8)
                    }

   -- Definition of MIB objects

   -- ===============================================================
   -- =  NIU System Group                                         =

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   -- ===============================================================

   dvbNiuMibVersion OBJECT-TYPE
       SYNTAX      SnmpAdminString
       MAX-ACCESS  read-only
       STATUS      current
       DESCRIPTION
           "The MIB version number."
   --  DEFVAL { '1.0' }
   ::= { dvbNiuSystem 1}

   dvbNiuSerialNum OBJECT-TYPE
       SYNTAX      SnmpAdminString
       MAX-ACCESS  read-only
       STATUS      current
       DESCRIPTION
           "This is the serial number of the equipment.  It should
            identify the manufacturer, model and revsion of the
            equiment"
   ::= { dvbNiuSystem 2 }

   dvbNiuResetNow OBJECT-TYPE
       SYNTAX      INTEGER {
                       resetNow(1),
                       ready(2)
                   }
       MAX-ACCESS  read-write
       STATUS      current
       DESCRIPTION
           "When this object is set to resetNow it will cause a
            hardware reset followed by sign on.  When read this object
            returns ready."
   ::= { dvbNiuSystem 3 }

   dvbNiuResetCounts OBJECT-TYPE
       SYNTAX      Counter32
       MAX-ACCESS  read-only
       STATUS      current
       DESCRIPTION
           "This counts the number of system resets since last power
            on."
   ::= { dvbNiuSystem 4}

   dvbNiuDateAndTime OBJECT-TYPE
       SYNTAX      DateAndTime
       MAX-ACCESS  read-write
       STATUS      current
       DESCRIPTION
           "The date and time.  See RFC1903"
   ::= { dvbNiuSystem 5}

   dvbNiuOperStatus OBJECT-TYPE
       SYNTAX      INTEGER {

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                       provisioning(1),
                       running(2),
                       stopped(3),
                       failed(4),
                       other(5)
                   }
       MAX-ACCESS  read-only
       STATUS      current
       DESCRIPTION
           "The operational status of the NIU.
            provisioning - The NIU is currently provisioning.
            running - The NIU has at least one operating connection.
            stopped - The NIU has no operating connection.
            failed  - The NIU has experienced a failure which prevents
                      further operation.
            other   - used for any case that is not explicitly
                      identified"
   ::= { dvbNiuSystem 6 }

   dvbNiuModemtype OBJECT-TYPE
       SYNTAX      INTEGER {
                       classA(1),
                       classB(2),
                       other(3)
                   }
       MAX-ACCESS  read-only
       STATUS      current
       DESCRIPTION
           "The EuroModem class to which the NIU belongs as specified
            in ECCA EuroModem Specification version 1.0"
   ::= { dvbNiuSystem 7 }

   -- Static IP address assignment table

   dvbNiuStaticIpTable OBJECT-TYPE
       SYNTAX      SEQUENCE OF DvbNiuStaticIpEntry
       MAX-ACCESS  not-accessible
       STATUS      current
       DESCRIPTION
           "This table is used to assign static IP addresses to NIU
            interfaces.  It needs to be used with care! DHCP/BOOTP
            assigned addresses overide entries in this table.
            The table is related to ifTable in the IF-MIB."
   ::= { dvbNiuSystem 8 }

   dvbNiuStaticIpEntry OBJECT-TYPE
       SYNTAX      DvbNiuStaticIpEntry
       MAX-ACCESS  not-accessible
       STATUS      current
       DESCRIPTION
           "A row can only be created if there is a corresponding row
            in ifTable.  The IP address to be assigned must be unique
            within the NIU for the address type.  The interface is

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            identified by ifIndex.
            For the HFC interface which is identified by 3 interfaces,
            the dvbRccMacLayer I/F shall be used to identify it.
            Rows are created/delete using dvbNiuStaticIpStatus."
       INDEX { ifIndex, dvbNiuStaticIpAddrType, dvbNiuStaticIpAddr }
   ::= { dvbNiuStaticIpTable 1 }

   DvbNiuStaticIpEntry ::= SEQUENCE {
       dvbNiuStaticIpAddrType InetAddressType,
       dvbNiuStaticIpAddr     InetAddress,
       dvbNiuStaticIpMaskType InetAddressType,
       dvbNiuStaticIpMask     InetAddress,
       dvbNiuStaticIpStatus   RowStatus
   }

   dvbNiuStaticIpAddrType OBJECT-TYPE
       SYNTAX      InetAddressType
       MAX-ACCESS  not-accessible
       STATUS      current
       DESCRIPTION
           "The type of IP address assigned to the interface."
   ::= { dvbNiuStaticIpEntry 1 }

   dvbNiuStaticIpAddr OBJECT-TYPE
       SYNTAX      InetAddress (SIZE (1..64))
       MAX-ACCESS  not-accessible
       STATUS      current
       DESCRIPTION
           "The IP address assigned to the interface."
   ::= { dvbNiuStaticIpEntry 2 }

   dvbNiuStaticIpMaskType OBJECT-TYPE
       SYNTAX      InetAddressType
       MAX-ACCESS  read-create
       STATUS      current
       DESCRIPTION
           "The type of IP address expressed by the mask."
   ::= { dvbNiuStaticIpEntry 3 }

   dvbNiuStaticIpMask OBJECT-TYPE
       SYNTAX      InetAddress
       MAX-ACCESS  read-create
       STATUS      current
       DESCRIPTION
           "The IP subnet mask for the interface."
   ::= { dvbNiuStaticIpEntry 4 }

   dvbNiuStaticIpStatus OBJECT-TYPE
       SYNTAX      RowStatus
       MAX-ACCESS  read-create
       STATUS      current
       DESCRIPTION
           "This controls and reflects the status of the row.

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            Rows can be created by using both createAndGo and
            createAndWait.  Rows can be modified/deleted ONLY if the
            SNMP set request destination IP address is NOT assigned by
            the row being modified/deleted.  The only exception to this
            rule is if DHCP has been enabled for the same interface."
   ::= { dvbNiuStaticIpEntry 5 }


   -- Removed and functionality replaced by RFC2573
   -- dvbNiuNmAccessTable OBJECT-TYPE
   --    SYNTAX      SEQUENCE OF DvbNiuNmAccessEntry
   --   MAX-ACCESS  not-accessible
   --    STATUS      current
   --    DESCRIPTION
   --        "This table controls access to SNMP objects by network
   --         management stations. If the table is empty, access
   --         to SNMP objects is unrestricted.  This table exists only
   --         on SNMPv1 or v2c agents and does not exist on SNMPv3
   --         agents. See the conformance section for details.
   --         Specifically, for v3 agents, the appropriate MIBs and
   --         security models apply in lieu of this table.
   --         An empty table will ONLY allow network management access
   --         from the HFC network, any IP address is accepted.
   --         Simultaneous write access to this MIB is not recommended"
   -- := { dvbNiuSystem 9 }


   dvbNiuConfigSet OBJECT-TYPE
       SYNTAX      INTEGER {
                       storeConfig(1),
                       readConfig(2),
                       setFactory(3),
                       local(4),
                       localUnsaved(5),
                       localSaved(6),
                       factoryDefault(7)
                   }
       MAX-ACCESS  read-write
       STATUS      current
       DESCRIPTION
           "This object is used to manage the configuration of the
            NIU.  The following can be used to set the object.

            storeConfig - stores the current configuration to non
                          volatile storage.  This action changes
                          configuration status to localSaved
            readConfig  - retrieves the configuration held in non
                          volatile storage.  This action changes
                          configuration status to local
            setFactory  - sets the current configuration to factory
                          default.  This excludes static assigned IP
                          addresses.  This action changes configuration
                          status to factoryDefault

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            When the object is read it reports the configuration being
            used.

            local          - the configuration is unchanged since being
                             retrieved from non volatile storage. When
                             changed it becomes localUnsaved
            localUnsaved   - the configuration has changed and requires
                             storing.  When stored it becomes
                             localSaved
            localSaved     - the current configuration has been saved
                             since being retrieved from non volatile
                             storage
            factoryDefault - the current configuration is the factory
                             default and requires saving.  Once saved
                             it becomes localSaved. If modified it
                             becomes localUnsaved"
   ::= { dvbNiuSystem 10 }

   dvbNiuEuroloader OBJECT-TYPE
       SYNTAX      INTEGER {
                       enabled(1),
                       disabled(2)
                   }
       MAX-ACCESS  read-only
       STATUS      current
       DESCRIPTION
           "Enables and disables the EuroLoader."
   ::= { dvbNiuSystem 11 }

   dvbNiuImplSet OBJECT-TYPE
       SYNTAX      BITS {
                       dhcp(0),
                       ipFilters(1),
                       ethFilters(2),
                       addrTransNat(3),
                       addrTransNapt(4),
                       cpeIpControl(5)
                   }
       MAX-ACCESS  read-only
       STATUS      current
       DESCRIPTION
           "This object when read identifies which optional groups have
            been implemented.  Implemented groups have their bit set.
            The bits represent the following:
              dhcp          - dvbNiuDhcp group
              ipFilters     - dvbNiuIpFilter group
              ethFilters    - dvbNiuEthFileter group
              addrTransNat  - dvbNiuNat group
              addrTransNapt - dvbNiuNapt group
              cpeIpControl  - dvbNiuCpe group"
   ::= { dvbNiuSystem 12 }


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   dvbNiuMulticast OBJECT-TYPE
       SYNTAX      INTEGER {
                       disabled(1),
                       downstreamOnly(2),
                       upstreamOnly(3),
                       enabled(4)
                   }
       MAX-ACCESS  read-write
       STATUS      current
       DESCRIPTION
           "This object is used to restrict the level of multicast
            support provided by the NIU.
              disabled - No IGMP or multicast packets are forwarded
                         through the NIU in either direction.
              downstreamOnly - Only multicast packets in the downstream
                         direction will be forwarded for the group to
                         which the subscriber has membership.  IGMP
                         messages are allowed to manage group
                         membership for downstream groups only.  Any
                         upstream multicast packets are discarded.
              upstreamOnly -  Only multicast packets in the upstream
                         direction will be forwarded by the NIU. IGMP
                         messages are allowed to manage group
                         membership for upstream groups only.
              enabled -  Multicast forwarding in the downstream and
                         upstream direction is allowed.  IGMP
                         messages are allowed to manage group
                         membership for both upstream and downstream
                         multicast groups."
   ::= { dvbNiuSystem 13 }


   -- ===============================================================
   -- =  Software Group                                             =
   -- ===============================================================

   -- Software version table

   dvbNiuSwVerTable OBJECT-TYPE
       SYNTAX      SEQUENCE OF DvbNiuSwVerEntry
       MAX-ACCESS  not-accessible
       STATUS      current
       DESCRIPTION
           "This table is used to check the versions of software stored
            in the NIU.  It is also used to configure which/when
            versions of software is executed."
   ::= { dvbNiuSoftware 1 }

   dvbNiuSwVerEntry OBJECT-TYPE
       SYNTAX      DvbNiuSwVerEntry
       MAX-ACCESS  not-accessible
       STATUS      current
       DESCRIPTION

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           "There will be a row for every storage slot within the
            NIU.  A slot is a location where a full software image
            can be stored.  Slot 0, is reserved for RAM."
       INDEX { dvbNiuSwSlot }
   ::= { dvbNiuSwVerTable 1 }

   DvbNiuSwVerEntry ::= SEQUENCE {
       dvbNiuSwSlot      Integer32,
       dvbNiuSwVersion   SnmpAdminString,
       dvbNiuSwState     INTEGER,
       dvbNiuSwAction    INTEGER,
       dvbNiuSwDateTime  DateAndTime
   }


   dvbNiuSwSlot OBJECT-TYPE
       SYNTAX Integer32 (1..100)
       MAX-ACCESS  not-accessible
       STATUS      current
       DESCRIPTION
           "The slot number the software image is held in. Slot 0 is
            reserved for RAM, it is used to identify an image directly
            loaded into RAM e.g. for debug purposes. The slots should
            be consecutively numbered starting from 1."
   ::= { dvbNiuSwVerEntry 1 }

   dvbNiuSwVersion OBJECT-TYPE
       SYNTAX      SnmpAdminString
       MAX-ACCESS  read-only
       STATUS      current
       DESCRIPTION
           "The version of the software located in the slot. This is
            a manufacturer dependant string."
   ::= { dvbNiuSwVerEntry 2 }

   dvbNiuSwState OBJECT-TYPE
       SYNTAX      INTEGER {
                       executing(1),
                       failed(2),
                       none(3)
                   }
       MAX-ACCESS  read-only
       STATUS      current
       DESCRIPTION
           "The execution state of the software in the slot.  If the
            s/w is currently executing the state will be executing(1).
            If the s/w tried to execute but failed it will be
            failed(2). If the s/w is not in use then it will be
            none(3)."
   ::= { dvbNiuSwVerEntry 3 }

   dvbNiuSwAction OBJECT-TYPE
       SYNTAX      INTEGER {

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                       boot(1),
                       backup(2),
                       none(3),
                       emptySlot(4)
                   }
       MAX-ACCESS  read-write
       STATUS      current
       DESCRIPTION
           "When the NIU is initialising, this identifies which s/w
            image should be used.

                boot   - identifies that this s/w should be used at
                         initialisation.  There must be one s/w version
                         with this action and there must be only one.
                backup - is used to identify a s/w version to use in
                         the event that the boot version fails.
                         Multiple s/w versions may have this action.
                         In this case they will be tried in slot order.
                none   - is used to identify a s/w version that is not
                         used at initialisation.
                emptySlot - identifies the slot as containing no s/w.
                            If this is applied to a slot that currently
                            contains a s/w image the image will be
                            erased and not identified in the slot."
   ::= { dvbNiuSwVerEntry 4 }

   dvbNiuSwDateTime OBJECT-TYPE
       SYNTAX      DateAndTime
       MAX-ACCESS  read-only
       STATUS      current
       DESCRIPTION
           "The date and time the image was downloaded to the slot."
   ::= { dvbNiuSwVerEntry 5 }

   -- End of software version table

   dvbNiuSwServerAddrType OBJECT-TYPE
       SYNTAX      InetAddressType
       MAX-ACCESS  read-write
       STATUS      current
       DESCRIPTION
           "The type of address used for the TFTP server."
   ::= { dvbNiuSoftware 2 }

   dvbNiuSwServer OBJECT-TYPE
       SYNTAX      InetAddress
       MAX-ACCESS  read-write
       STATUS      current
       DESCRIPTION
           "This is the IP address of the TFTP server used for s/w
            updates"
   ::= { dvbNiuSoftware 3 }


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   dvbNiuSwFilename OBJECT-TYPE
       SYNTAX      OCTET STRING (SIZE(0..500))
       MAX-ACCESS  read-write
       STATUS      current
       DESCRIPTION
           "This is the filename including the path for the software
            image that is to be downloaded."
   ::= { dvbNiuSoftware 4 }

   dvbNiuSwDownloadSlot OBJECT-TYPE
       SYNTAX      Integer32 (0..100)
       MAX-ACCESS  read-write
       STATUS      current
       DESCRIPTION
           "This identifies the image slot which the software is to be
            downloaded into.  The operator can manually select the slot
            to download into. Slot 0 is a special case which is used to
            identify a direct to RAM download, which should only be
            used for diagnostic purposes.  By default this object will
            point to the first empty slot.  If there are no empty slots
            it will point to the first backup image."
   ::= { dvbNiuSoftware 5 }

   dvbNiuSwAdminStatus OBJECT-TYPE
       SYNTAX      INTEGER {
                       initUpgrd(1),
                       contactingTFTPServer(2),
                       downloadInProgress(3),
                       failureTFTP(4),
                       badImage(5),
                       badHardware(6),
                       downloadSuccessful(7),
                       idle(8)
                   }
       MAX-ACCESS  read-write
       STATUS      current
       DESCRIPTION
           "This will administer the software upgrade and
            provide status of its progress.

            InitiateUpgrade      - This is the only admin selectable
                                   value and initiates the upgrade
            ContactingTFTPServer - The TFTP server is being contacted
            DownloadInProgress   - The image is currently being
                                   downloaded to the Niu
            TFTPFailure          - There was a failure at the TFTP
                                   layer while downloading
            BadImage             - The downloaded software image failed
                                   an integrity check
            BadHardware          - The downloaded software image is not
                                   suitable for the H/W platform
            DownloadSuccessful   - The downloaded software image has
                                   been successful

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            Idle                 - No attempt to download software has
                                   been made since the last reset"
   ::= { dvbNiuSoftware 6 }

   -- ===============================================================
   -- =  DHCP Group                                                 =
   -- ===============================================================

   dvbNiuDhcpTable OBJECT-TYPE
       SYNTAX      SEQUENCE OF DvbNiuDhcpEntry
       MAX-ACCESS  not-accessible
       STATUS      current
       DESCRIPTION
           "This table is used to manage the DHCP/BOOTP functionality
            on a per interface basis.  All DHCP/BOOTP requests will
            be via the HFC interface."
   ::= { dvbNiuDhcp 1 }

   dvbNiuDhcpEntry OBJECT-TYPE
       SYNTAX      DvbNiuDhcpEntry
       MAX-ACCESS  not-accessible
       STATUS      current
       DESCRIPTION
           "There will be a row for every interface within the
            equipment.
            For the HFC interface which is identified by 3 interfaces,
            the dvbRccMacLayer I/F shall be used to identify it.
            For an interface it is possible to specify the DHCP/BOOTP
            server to be used to obtain an IP address for the interface
            and any DHCP/BOOTP requests received on that interface that
            require relaying.  Backup DHCP/BOOTP servers can be
            specified for each interface."
       INDEX { ifIndex, dvbNiuDhcpIndex }
   ::= { dvbNiuDhcpTable 1 }

   DvbNiuDhcpEntry ::= SEQUENCE {
       dvbNiuDhcpIndex           Unsigned32,
       dvbNiuDhcpServerAddrType  InetAddressType,
       dvbNiuDhcpServer          InetAddress,
       dvbNiuDhcpRelay           INTEGER,
       dvbNiuDhcpReqIf           INTEGER,
       dvbNiuDhcpSerType         INTEGER,
       dvbNiuDhcpState           INTEGER,
       dvbNiuDhcpStatus          RowStatus
   }

   dvbNiuDhcpIndex OBJECT-TYPE
       SYNTAX      Unsigned32
       MAX-ACCESS  not-accessible
       STATUS      current
       DESCRIPTION
           "Index used to order the application of backup
            entries."

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   ::= { dvbNiuDhcpEntry 1 }

   dvbNiuDhcpServerAddrType OBJECT-TYPE
       SYNTAX      InetAddressType
       MAX-ACCESS  read-create
       STATUS      current
       DESCRIPTION
           "The type of IP address for the DHCP server."
   ::= { dvbNiuDhcpEntry 2 }


   dvbNiuDhcpServer OBJECT-TYPE
       SYNTAX      InetAddress
       MAX-ACCESS  read-create
       STATUS      current
       DESCRIPTION
           "The IP address of the DHCP / BOOTP server to be used for
            DHCP/BOOTP requests for the / received by the interface.
            This server MUST be accessible through the HFC interface.
            The broadcast IP address must be used when the IP address
            is to be unspecified or the interface is the HFC
            interface."
   ::= { dvbNiuDhcpEntry 3 }

   dvbNiuDhcpRelay OBJECT-TYPE
       SYNTAX      INTEGER  {
                       enabled(1),
                       disabled(2)
                   }
       MAX-ACCESS  read-create
       STATUS      current
       DESCRIPTION
           "This is used to select whether the NIU will relay
            DHCP/BootP requests received from this interface to the HFC
            interface.  This option is ignored for the HFC interface.
                enabled  - relay DHCP/BootP as per RFCs 951,1542, 2131
                disabled - discard DHCP/BootP"
       DEFVAL      { disabled }
   ::= { dvbNiuDhcpEntry 4 }

   dvbNiuDhcpReqIf OBJECT-TYPE
       SYNTAX      INTEGER  {
                       enabled(1),
                       disabled(2)
                   }
       MAX-ACCESS  read-create
       STATUS      current
       DESCRIPTION
           "This is used to select whether the NIU will request an IP
            address by DHCP/BootP for this interface via the HFC
            interface.  If this is disabled then there must be an entry
            in the static IP table for this interface.
                enabled  - request address by DHCP/BootP

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                disabled - Use static IP address assignment"
   --    DEFVAL { enabled } for the HFC interface
   ::= { dvbNiuDhcpEntry 5 }

   dvbNiuDhcpSerType OBJECT-TYPE
       SYNTAX      INTEGER  {
                       primary(1),
                       backup(2)
                   }
       MAX-ACCESS  read-create
       STATUS      current
       DESCRIPTION
           "This is used to identify whether the specified server for
            the interface is the primary server or backup.  In the
            event that the primary server does not respond, the backup
            server is used.  There can be only one primary server for
            an interface, but multiple backup servers.  The backup
            servers use the values dvbNiuDhcpRelay and dvbNiuDhcpReqIf
            specified for the primary server for the interface, if a
            primary server is present otherwise the values are as
            defined for the backup server row.  The order in which
            backup servers are tried is implied by the value of
            dvbNiuDhcpIndex, lowest first.  This field is not
            applicable for the HFC interface."
       DEFVAL { primary }
   ::= { dvbNiuDhcpEntry 6 }

   dvbNiuDhcpState OBJECT-TYPE
       SYNTAX      INTEGER  {
                       idle(1),
                       waitingForDHCPoffer(2),
                       waitingForDHCPack(3),
                       assigned(4)
                   }
       MAX-ACCESS  read-only
       STATUS      current
       DESCRIPTION
           "This is the status for DHCP for this interface.
            idle   - No DHCP request has been made
            waitingForDHCPoffer - Waiting for DHCP offer
            waitingForDHCPack   - Waiting for DHCP ack
            assigned - IP address for I/F assigned by DHCP."
   ::= { dvbNiuDhcpEntry 7 }

   dvbNiuDhcpStatus OBJECT-TYPE
       SYNTAX      RowStatus
       MAX-ACCESS  read-create
       STATUS      current
       DESCRIPTION
           "Controls and reflects the status of rows in this
            table. Rows in this table may be created by either the
            create-and-go or create-and-wait paradigms.  There is no
            restriction on changing values in a row of this table while

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            the row is active."
   ::= { dvbNiuDhcpEntry 8 }

   -- ===============================================================
   -- =  Event Group                                                =
   -- ===============================================================


   dvbNiuEventPolicy OBJECT-TYPE
       SYNTAX      INTEGER {
                       wrap(1),
                       stop(2),
                       oneHour(3),
                       clearNow(4)
                   }
       MAX-ACCESS  read-write
       STATUS      current
       DESCRIPTION
           "This defines event log policy.
                wrap        When full the log wraps
                stop        Stop event logging when full
                oneHour     Clear the log at the start of every hour
                clearNow    Clears the event log. Previous policy is
                            restored.

               At initial startup this object has the default value of
               wrap(1)."
   ::= { dvbNiuEvent 1 }

   -- Event control table

   dvbNiuEventControlTable OBJECT-TYPE
       SYNTAX      SEQUENCE OF DvbNiuEventControlEntry
       MAX-ACCESS  not-accessible
       STATUS      current
       DESCRIPTION
           "This table defines the action to be taken for the defined
            event priorities.  A row will exist for each priority:
            Emergency, Alert, Critical, Error, Warning, Notice,
            Information and Debug. A bit field is used to identify the
            action to be taken for the event priority. Actions can be:
            place the event in the event table; issue an SNMP Trap"
   ::= { dvbNiuEvent 2 }

   dvbNiuEventControlEntry OBJECT-TYPE
       SYNTAX      DvbNiuEventControlEntry
       MAX-ACCESS  not-accessible
       STATUS      current
       DESCRIPTION
           "There is a row per event and are recorded in chronological
            order."
       INDEX { dvbNiuEventCtrlPriority }
   ::= { dvbNiuEventControlTable 1 }

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   DvbNiuEventControlEntry ::= SEQUENCE {
       dvbNiuEventControlPriority    DvbEventPriority,
       dvbNiuEventControlAction      BITS
   }

   dvbNiuEventControlPriority OBJECT-TYPE
       SYNTAX      DvbEventPriority
       MAX-ACCESS  not-accessible
       STATUS      current
       DESCRIPTION
           "The priority level that is controlled by this entry.
            These are ordered from most (emergency) to least (debug)
            critical.  Each event with a NIU has a particular
            priority level associated with it (as defined by the
            vendor). During normal operation no event more critical
            than notice(6) should be generated. Events between warning
            and emergency should be generated at appropriate levels of
            problems (e.g. emergency when the box is about to
            crash)."
   ::= { dvbNiuEventControlEntry 1 }

   dvbNiuEventControlAction OBJECT-TYPE
       SYNTAX      BITS {
                       local(0),
                       trap(1)
                   }
       MAX-ACCESS  read-write
       STATUS      current
       DESCRIPTION
           "This defines the actions to perform when an event happens
            of this priority. local causes the event to be written to
            the local event log. trap causes a trap to be issued."
   ::= { dvbNiuEventControlEntry 2 }

   -- Currently no traps are defined, these need to be added.

   -- End of Event control table

   dvbNiuEventTableMaxSize OBJECT-TYPE
       SYNTAX      Integer32 (1..2147483647)
       MAX-ACCESS  read-only
       STATUS      current
       DESCRIPTION
           "The maximum number of entries the event log may hold"
   ::= { dvbNiuEvent 3 }

   -- Event table

   dvbNiuEventTable OBJECT-TYPE
       SYNTAX      SEQUENCE OF DvbNiuEventEntry
       MAX-ACCESS  not-accessible
       STATUS      current

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       DESCRIPTION
           "Contains a log of network and device events that may be of
            interest in fault isolation and trouble shooting."
   ::= { dvbNiuEvent 4 }

   dvbNiuEventEntry OBJECT-TYPE
       SYNTAX      DvbNiuEventEntry
       MAX-ACCESS  not-accessible
       STATUS      current
       DESCRIPTION
           "Entries are created when an event occurrs.
            dvbNiuEventPolicy can be used to clear the table in
            addition individual events can be deleted."
       INDEX { dvbNiuEventIndex }
   ::= { dvbNiuEventTable 1 }

   DvbNiuEventEntry ::= SEQUENCE {
       dvbNiuEventIndex        Unsigned32,
       dvbNiuEventType         DvbEventPriority,
       dvbNiuEventDateTime     DateAndTime,
       dvbNiuEventDescription  SnmpAdminString,
       dvbNiuEventCode         SnmpAdminString,
       dvbNiuEventStatus       RowStatus
   }

   dvbNiuEventIndex OBJECT-TYPE
       SYNTAX      Unsigned32
       MAX-ACCESS  not-accessible
       STATUS      current
       DESCRIPTION
           "This provides relative ordering of the objects in the event
            log. This object will always increase except when
                (a) the log is reset via dvbNiuEventPolicy,
                (b) the device reboots and does not implement non-
                    volatile storage for this log, or (c) it reaches
                    the value 2^31. The next entry for all the above
                    cases is 1."
   ::= { dvbNiuEventEntry 1 }

   dvbNiuEventType OBJECT-TYPE
       SYNTAX      DvbEventPriority
       MAX-ACCESS  read-only
       STATUS      current
       DESCRIPTION
           "This is the priority of the event."
   ::= { dvbNiuEventEntry 2 }

   dvbNiuEventDateTime OBJECT-TYPE
       SYNTAX      DateAndTime
       MAX-ACCESS  read-only
       STATUS      current
       DESCRIPTION
           "This is the date and time the event occurred."

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   ::= { dvbNiuEventEntry 3 }

   dvbNiuEventDescription OBJECT-TYPE
       SYNTAX      SnmpAdminString
       MAX-ACCESS  read-only
       STATUS      current
       DESCRIPTION
           "This is a vendor specific textual description of the
            event."
   ::= { dvbNiuEventEntry 4 }

   dvbNiuEventCode OBJECT-TYPE
       SYNTAX      SnmpAdminString
       MAX-ACCESS  read-only
       STATUS      current
       DESCRIPTION
           "This is the event code which uniquely identifies the event.
            The event codes should be in the form tppxxxxx where:-
            t  - identifies who allocated the event identifier; d =
                 dvb, v = vendor
            pp - identifies the priority; em = emergency, al = alert,
                 cr = critical, er = error, wa = warning, no = notice,
                 in = information, de = debug
            xxxxxxx - the event identifier which is 5 characters."
   ::= { dvbNiuEventEntry 5 }

   dvbNiuEventStatus OBJECT-TYPE
       SYNTAX      RowStatus
       MAX-ACCESS  read-write
       STATUS      current
       DESCRIPTION
           "This is used to delete individual events.  The only valid
            management operation is destroy, which causes the event to
            be deleted.  When read this object should always return
            active."
   ::= { dvbNiuEventEntry 6 }

   -- End of Event table

   -- These apply to traps sent to all

   dvbNiuEvThrottleAdminStatus OBJECT-TYPE
       SYNTAX      INTEGER {
                       unconstrained(1),
                       maintainBelowThreshold(2),
                       stopAtThreshold(3),
                       inhibited(4)
                   }
       MAX-ACCESS  read-write
       STATUS      current
       DESCRIPTION
           "Controls the transmission of traps with respect to the
            trap pacing threshold.

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            unconstrained(1) causes traps to be transmitted without
            regard to the threshold settings.
            maintainBelowThreshold(2) causes trap transmission to be
            suppressed if the number of traps would otherwise exceed
            the threshold.
            stopAtThreshold(3) causes trap transmission to cease
            at the threshold, and not resume until directed to do so.
            See also RFC 1224.
            inhibited(4) causes all trap transmission messages to be
            suppressed.

            Writing to this object resets the thresholding state.

            At initial startup, this object has a default value of
            unconstrained(1).

            All the network managers with the trap capability as per
            RFC2573 will be treated as a single entity with regard to
            Trap management.  This is done to simplify implementation
            within the NIU."
   ::= { dvbNiuEvent 5 }

   dvbNiuEvThrottleInhibited OBJECT-TYPE
       SYNTAX      TruthValue
       MAX-ACCESS  read-only
       STATUS      current
       DESCRIPTION
           "If true(1), trap is currently inhibited due to thresholds
            and/or the current setting of dvbNiuEvThrottleAdminStatus.
            In addition, this is set to true(1) if transmission is
            inhibited due to no trap (dvbNiuNmAccessEntry)
            destinations having been set."
   ::= { dvbNiuEvent 6 }

   dvbNiuEvThrottleThreshold OBJECT-TYPE
       SYNTAX      Unsigned32
       MAX-ACCESS  read-write
       STATUS      current
       DESCRIPTION
           "Number of trap events per DvbNiuEvThrottleInterval
            to be transmitted before throttling.

            At initial startup, this object returns 0."
   ::= { dvbNiuEvent 7 }

   dvbNiuEvThrottleInterval OBJECT-TYPE
       SYNTAX      Integer32 (1..2147483647)
       UNITS       "seconds"
       MAX-ACCESS  read-write
       STATUS      current
       DESCRIPTION
           "The interval over which the trap threshold applies.
            At initial startup, this object has a value of 1."

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   ::= { dvbNiuEvent 8 }



   -- ===============================================================
   -- =  IP Filter Group                                            =
   -- ===============================================================

   dvbNiuIpFilterEnable OBJECT-TYPE
       SYNTAX      INTEGER {
                       enabled(1),
                       countHits(3),
                       disabled(4)
                   }
       MAX-ACCESS  read-write
       STATUS      current
       DESCRIPTION
           "This controls the IP filter table.
                enable     - Enables the IP filter table.
                countHits  - This option is used to debug the filter
                             table.  It allows packets to be checked
                             against the filter table and increments
                             dvbNiuIpFilterMatches for a matching
                             filter, but ALL PACKETS ARE ALLOWED
                             THROUGH.
                disabled   - Disables IP filtering, all packets are
                             allowed through.

                At initial startup this object has the default value of
                disabled(4)."
   ::= { dvbNiuIpFilter 1 }


   dvbNiuIpFilterTable OBJECT-TYPE
       SYNTAX      SEQUENCE OF DvbNiuIpFilterEntry
       MAX-ACCESS  not-accessible
       STATUS      current
       DESCRIPTION
           "An ordered list of filters or classifiers to apply to
            IP traffic. Filter application is ordered by the filter
            index, rather than by a best match algorithm (Note that
            this implies that the filter table may have gaps in the
            index values). Packets which have matched no filters will
            be discarded i.e. no hits on any filter.

            Any IP packet can theoretically match multiple rows of
            this table.  When considering a packet, the table is
            scanned in row index order (e.g. filter 10 is checked
            before filter 20).  If the packet matches that filter
            (which means that it matches ALL criteria for that row),
            actions appropriate to dvbNiuIpFilterAction and
            dvbNiuIpFilterActionPtr are taken.  If the packet was
            discarded processing is complete.  If

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            dvbNiuIpFilterContinue is set to true, the filter
            comparison continues with the next row in the table
            looking for additional matches."
   ::= { dvbNiuIpFilter 2 }

   dvbNiuIpFilterEntry OBJECT-TYPE
       SYNTAX      DvbNiuIpFilterEntry
       MAX-ACCESS  not-accessible
       STATUS      current
       DESCRIPTION
           "Describes a filter to apply to IP traffic received on a
            specified interface.  All identity objects in this table
            (e.g. source and destination address/mask, protocol,
            source/dest port, TOS/mask, interface and direction) must
            match their respective fields in the packet for any given
            filter to match.

            To create an entry in this table, dvbNiuIpFilterIfIndex
            must be specified."
            INDEX { dvbNiuIpFilterIndex }
   ::= { dvbNiuIpFilterTable 1 }

   DvbNiuIpFilterEntry ::= SEQUENCE {
       dvbNiuIpFilterIndex          Unsigned32,
       dvbNiuIpFilterStatus         RowStatus,
       dvbNiuIpFilterIfIndex        InterfaceIndexOrZero,
       dvbNiuIpFilterDirection      INTEGER,
       dvbNiuIpFilterTos            OCTET STRING,
       dvbNiuIpFilterTosMask        OCTET STRING,
       dvbNiuIpFilterSrcAddrType    InetAddressType,
       dvbNiuIpFilterSrcAddr        InetAddress,
       dvbNiuIpFilterSrcMaskType    InetAddressType,
       dvbNiuIpFilterSrcMask        InetAddress,
       dvbNiuIpFilterDstAddrType    InetAddressType,
       dvbNiuIpFilterDstAddr        InetAddress,
       dvbNiuIpFilterDstMaskType    InetAddressType,
       dvbNiuIpFilterDstMask        InetAddress,
       dvbNiuIpFilterProtocol       Integer32,
       dvbNiuIpFilterSrcPortLow     Integer32,
       dvbNiuIpFilterSrcPortHigh    Integer32,
       dvbNiuIpFilterDstPortLow     Integer32,
       dvbNiuIpFilterDstPortHigh    Integer32,
       dvbNiuIpFilterAction         INTEGER,
       dvbNiuIpFilterMatches        Counter32,
       dvbNiuIpFilterContinue       TruthValue,
       dvbNiuIpFilterActionPtr      Integer32
   }

   dvbNiuIpFilterIndex OBJECT-TYPE
       SYNTAX      Unsigned32
       MAX-ACCESS  not-accessible
       STATUS      current
       DESCRIPTION

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           "Index used to order the application of filters.
            The filter with the lowest index is always applied
            first."
   ::= { dvbNiuIpFilterEntry 1 }

   dvbNiuIpFilterStatus OBJECT-TYPE
       SYNTAX      RowStatus
       MAX-ACCESS  read-create
       STATUS      current
       DESCRIPTION
           "Controls and reflects the status of rows in this
            table. Specifying only this object (with the appropriate
            index) on a NIU is sufficient to create a filter row which
            matches all inbound packets on the Ethernet interface,
            and results in the packets being discarded.  Creation of
            the rows may be done via either create-and-wait or
            create-and-go, but the filter is not applied until this
            object is set to (or changes to) active. There is no
            restriction in changing any object in a row while this
            object is set to active."
   ::= { dvbNiuIpFilterEntry 2 }


   dvbNiuIpFilterIfIndex OBJECT-TYPE
       SYNTAX      InterfaceIndexOrZero
       MAX-ACCESS  read-create
       STATUS      current
       DESCRIPTION
           "The entry interface to which this filter applies. The
            value corresponds to ifIndex for either a CATV MAC or
            another network interface. If the value is zero, the
            filter applies to all interfaces. Default value in NIU
            is the index of the customer-side (e.g. ethernet)
            interface."
   ::= { dvbNiuIpFilterEntry 4 }

   dvbNiuIpFilterDirection OBJECT-TYPE
       SYNTAX INTEGER {
                  inbound(1),
                  outbound(2),
                  both(3)
              }
       MAX-ACCESS  read-create
       STATUS      current
       DESCRIPTION
           "Determines whether the filter is applied to inbound(1)
            traffic, outbound(2) traffic, or traffic in both(3)
            directions."
       DEFVAL { inbound }
   ::= { dvbNiuIpFilterEntry 5 }

   dvbNiuIpFilterTos  OBJECT-TYPE
       SYNTAX      OCTET STRING ( SIZE (1))

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       MAX-ACCESS  read-create
       STATUS      current
       DESCRIPTION
           "This is the value to be matched to the packet's
            TOS (Type of Service) value (after the TOS value
            is AND'd with dvbNiuIpFilterTosMask).  A value for this
            object of 0 and a mask of 0 matches all TOS values."
       DEFVAL { '00'h }
   ::= { dvbNiuIpFilterEntry 6 }

   dvbNiuIpFilterTosMask OBJECT-TYPE
       SYNTAX      OCTET STRING ( SIZE (1) )
       MAX-ACCESS  read-create
       STATUS      current
       DESCRIPTION
           "The mask to be applied to the packet's TOS value before
            matching."
       DEFVAL { '00'h }
   ::= { dvbNiuIpFilterEntry 7 }

   dvbNiuIpFilterSrcAddrType OBJECT-TYPE
       SYNTAX      InetAddressType
       MAX-ACCESS  read-create
       STATUS      current
       DESCRIPTION
           "The type of IP address for the source address."
   ::= { dvbNiuIpFilterEntry 8 }

   dvbNiuIpFilterSrcAddr OBJECT-TYPE
       SYNTAX      InetAddress
       MAX-ACCESS  read-create
       STATUS      current
       DESCRIPTION
           "The source IP address, or portion thereof, that is to be
            matched for this filter.  The source address is first
            masked (and'ed) against dvbNiuIpFilterSrcMask before being
            compared  to this value.  A value of 0 for this object
            and 0 for the mask matches all IP addresses."
   ::= { dvbNiuIpFilterEntry 9 }

   dvbNiuIpFilterSrcMaskType OBJECT-TYPE
       SYNTAX      InetAddressType
       MAX-ACCESS  read-create
       STATUS      current
       DESCRIPTION
           "The type of IP address for the source address mask."
   ::= { dvbNiuIpFilterEntry 10 }

   dvbNiuIpFilterSrcMask OBJECT-TYPE
       SYNTAX      InetAddress
       MAX-ACCESS  read-create
       STATUS      current
       DESCRIPTION

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           "A bit mask that is to be applied to the source address
            prior to matching. This mask is not necessarily the same
            as a subnet mask, but 1's bits must be leftmost and
            contiguous."
   ::= { dvbNiuIpFilterEntry 11 }

   dvbNiuIpFilterDstAddrType OBJECT-TYPE
       SYNTAX      InetAddressType
       MAX-ACCESS  read-create
       STATUS      current
       DESCRIPTION
           "The type of IP address for the destination address."
   ::= { dvbNiuIpFilterEntry 12 }

   dvbNiuIpFilterDstAddr OBJECT-TYPE
       SYNTAX      InetAddress
       MAX-ACCESS  read-create
       STATUS      current
       DESCRIPTION
           "The destination IP address, or portion thereof, that is
            to be matched for this filter. The destination address is
            first masked (and'ed) against dvbNiuIpFilterDstMask before
            being compared  to this value.  A value of 0 for this
            object and 0 for the mask matches all IP addresses."
   ::= { dvbNiuIpFilterEntry 13 }

   dvbNiuIpFilterDstMaskType OBJECT-TYPE
       SYNTAX      InetAddressType
       MAX-ACCESS  read-create
       STATUS      current
       DESCRIPTION
           "The type of IP address for the destination address mask."
   ::= { dvbNiuIpFilterEntry 14 }

   dvbNiuIpFilterDstMask OBJECT-TYPE
       SYNTAX      InetAddress
       MAX-ACCESS  read-create
       STATUS      current
       DESCRIPTION
           "A bit mask that is to be applied to the destination
            address prior to matching. This mask is not necessarily
            the same as a subnet mask, but 1's bits must be leftmost
            and contiguous."
   ::= { dvbNiuIpFilterEntry 15 }

   dvbNiuIpFilterProtocol OBJECT-TYPE
       SYNTAX Integer32 (0..256)
       MAX-ACCESS  read-create
       STATUS      current
       DESCRIPTION
           "The IP protocol value that is to be matched. For example:
            icmp is 1, tcp is 6, udp is 17. A value of 256 matches
            ANY protocol."

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       DEFVAL { 256 }
   ::= { dvbNiuIpFilterEntry 16 }

   dvbNiuIpFilterSrcPortLow OBJECT-TYPE
       SYNTAX      Integer32 (0..65535)
       MAX-ACCESS  read-create
       STATUS      current
       DESCRIPTION
           "If dvbNiuIpFilterProtocol is udp or tcp, this is the
            inclusive lower bound of the transport-layer source port
            range that is to be matched, otherwise it is ignored
            during matching."
       DEFVAL { 0 }
   ::= { dvbNiuIpFilterEntry 17 }

   dvbNiuIpFilterSrcPortHigh OBJECT-TYPE
       SYNTAX      Integer32 (0..65535)
       MAX-ACCESS  read-create
       STATUS      current
       DESCRIPTION
           "If dvbNiuIpFilterProtocol is udp or tcp, this is the
            inclusive upper bound of the transport-layer source port
            range that is to be matched, otherwise it is ignored
            during matching."
       DEFVAL { 65535 }
   ::= { dvbNiuIpFilterEntry 18 }

   dvbNiuIpFilterDstPortLow OBJECT-TYPE
       SYNTAX      Integer32 (0..65535)
       MAX-ACCESS  read-create
       STATUS      current
       DESCRIPTION
           "If dvbNiuIpFilterProtocol is udp or tcp, this is the
            inclusive lower bound of the transport-layer destination
            port range that is to be matched, otherwise it is ignored
            during matching."
       DEFVAL { 0 }
   ::= { dvbNiuIpFilterEntry 19 }

   dvbNiuIpFilterDstPortHigh OBJECT-TYPE
       SYNTAX      Integer32 (0..65535)
       MAX-ACCESS  read-create
       STATUS      current
       DESCRIPTION
           "If dvbNiuIpFilterProtocol is udp or tcp, this is the
            inclusive upper bound of the transport-layer destination
            port range that is to be matched, otherwise it is ignored
            during matching."
       DEFVAL { 65535 }
   ::= { dvbNiuIpFilterEntry 20 }

   dvbNiuIpFilterAction OBJECT-TYPE
       SYNTAX      INTEGER {

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                       discard(1),
                       accept(2),
                       nat(3),
                       napt(4),
                       tosmap(5)
                   }
       MAX-ACCESS  read-create
       STATUS      current
       DESCRIPTION
           "This is the action to be performed if there is a match
            against this filter.  Possible actions are:
            discard - Discard the packet.
            accept  - Accept the packet for further processing /
                      forwarding.
            nat     - Perform network address translation on this
                      packet.
                      This is used to identify internal addresses that
                      can be mapped to external addresses.
            napt    - Perform network port address translation on this
                      packet. This is used to identify internal
                      adresses that can be mapped to an external
                      address/port.
            tosmap  - Apply TOS to this packet."
       DEFVAL { discard }
   ::= { dvbNiuIpFilterEntry 21 }

   dvbNiuIpFilterMatches OBJECT-TYPE
       SYNTAX      Counter32
       MAX-ACCESS  read-only
       STATUS      current
       DESCRIPTION
           "Counts the number of times this filter was matched.
            This object is initialized to 0 at boot, or at row
            creation, and is reset only upon reboot."
   ::= { dvbNiuIpFilterEntry 22 }

   dvbNiuIpFilterContinue OBJECT-TYPE
       SYNTAX      TruthValue
       MAX-ACCESS  read-create
       STATUS      current
       DESCRIPTION
           "If this value is set to true and dvbNiuIpFilterAction
            is not discard, continue scanning and applying
            matching filter actions."
       DEFVAL { false }
   ::= { dvbNiuIpFilterEntry 23 }

   dvbNiuIpFilterActionPtr OBJECT-TYPE
       SYNTAX      Integer32 (0..2147483647)
       MAX-ACCESS  read-create
       STATUS      current
       DESCRIPTION
           "This object identifies the dvbNiuIpTosMapPolicyId

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            in dvbNiuIpTOSMapTable that is to be applied if
            dvbNiuIpFilterAction is set to tosMap.
            If no matching policy exists, treat as if
            dvbNiuIpFilterAction were set to accept (1).
            If this object is set to the value of 0, there is no
            matching policy, and dvbNiuIpTOSMapTable MUST NOT be
            consulted."
       DEFVAL { 0 }
   ::= { dvbNiuIpFilterEntry 24 }

   -- End of IP filter table

   -- TOS Map Table

   dvbNiuIpTOSMapTable OBJECT-TYPE
       SYNTAX      SEQUENCE OF DvbNiuIpTOSMapEntry
       MAX-ACCESS  not-accessible
       STATUS      current
       DESCRIPTION
           "A Table which maps between a policy id
            (dvbNiuIpTosMapPolicyId) and a policy to be applied.  This
            table applies only to the TOS within the IP header.
           Policy ID 0 is reserved."
   ::= { dvbNiuIpFilter 3 }

   dvbNiuIpTOSMapEntry OBJECT-TYPE
       SYNTAX      DvbNiuIpTOSMapEntry
       MAX-ACCESS  not-accessible
       STATUS      current
       DESCRIPTION
           "Table used to describe Type of Service (TOS) bits
            processing.

            This table is an adjunct to the dvbNiuIpFilterTable.
            Entries in the latter table can point to specific rows
            in this (and other)tables and cause specific actions to
            be taken.  This table permits the manipulation of the value
            of the Type of Service bits in the IP header of the matched
            packet as follows:
            Set the tosBits of the packet to
            (tosBits & dvbNiuIpTosMapAndMask) | dvbNiuIpTosMapOrMask

            This construct allows you to do a clear and set of all
            the TOS bits in a flexible manner."
       INDEX { dvbNiuIpTosMapIndex }
   ::= { dvbNiuIpTOSMapTable 1 }

   DvbNiuIpTOSMapEntry ::= SEQUENCE {
       dvbNiuIpTosMapIndex     Unsigned32,
       dvbNiuIpTosMapPolicyId  Unsigned32,
       dvbNiuIpTosMapStatus    RowStatus,
       dvbNiuIpTosMapAndMask   OCTET STRING (SIZE (1)),
       dvbNiuIpTosMapOrMask    OCTET STRING (SIZE (1))

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   }

   dvbNiuIpTosMapIndex OBJECT-TYPE
       SYNTAX      Unsigned32
       MAX-ACCESS  not-accessible
       STATUS      current
       DESCRIPTION
           "The unique index for this row.  There are no ordering
            requirements for this table and any valid index may be
            specified."
   ::= { dvbNiuIpTOSMapEntry 1 }

   dvbNiuIpTosMapPolicyId OBJECT-TYPE
       SYNTAX      Unsigned32
       MAX-ACCESS  read-only
       STATUS      current
       DESCRIPTION
           "The unique index for this row.  There are no ordering
            requirements for this table and any valid index may be
            specified.  This index is used by dvbNiuIpFilterPolicyId as
            the pointer to the TOS mapping to be performed."
   ::= { dvbNiuIpTOSMapEntry 2 }

   dvbNiuIpTosMapStatus OBJECT-TYPE
       SYNTAX      RowStatus
       MAX-ACCESS  read-create
       STATUS      current
       DESCRIPTION
           "The object used to create and delete entries in this
            table. A row created by specifying just this object
            results in a row which specifies no change to the TOS
            bits.   A row may be created using either the create-and-go
            or create-and-wait paradigms. There is no restriction on
            the ability to change values in this row while the row is
            active."
   ::= { dvbNiuIpTOSMapEntry 3 }

   dvbNiuIpTosMapAndMask OBJECT-TYPE
       SYNTAX      OCTET STRING (SIZE (1))
       MAX-ACCESS  read-create
       STATUS      current
       DESCRIPTION
           "This value is bitwise AND'd with the matched  packet's
           TOS bits."
       DEFVAL { 'ff'h }
   ::= { dvbNiuIpTOSMapEntry 4 }

   dvbNiuIpTosMapOrMask OBJECT-TYPE
       SYNTAX      OCTET STRING (SIZE (1))
       MAX-ACCESS  read-create
       STATUS      current
       DESCRIPTION
           "After bitwise AND'ing with the above bits, the packet's

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            TOS bits are bitwise OR'd with these bits."
       DEFVAL { '00'h }
   ::= { dvbNiuIpTOSMapEntry 5 }

   -- End of TOS Map table

   -- ===============================================================
   -- =  NAT Group                                                  =
   -- ===============================================================

   -- NAT assignment table

   dvbNiuNatTable OBJECT-TYPE
       SYNTAX      SEQUENCE OF DvbNiuNatEntry
       MAX-ACCESS  not-accessible
       STATUS      current
       DESCRIPTION
           "This table is used to list external IP addresses available
            for assignment to internal IP addresses.  The filter table
            is used to identify internal addresses that require NAT
            before entering the external domain (upstream).  In the
            downstream direction NAT (inverse of the NAT applied in the
            upstream) is applied before applying the IP filter table.
            NAT assignment algorithims are vendor dependant.  When an
            external IP address is no longer assigned to an IP addess,
            dvbNiuNatIntIp should be all 0's. If there are no free
            external addresses the packet requiring translation should
            be dropped.

            NAPT is not applicable to multicast packets."
   ::= { dvbNiuNat 1 }

   dvbNiuNatEntry OBJECT-TYPE
       SYNTAX      DvbNiuNatEntry
       MAX-ACCESS  not-accessible
       STATUS      current
       DESCRIPTION
           "A row should be created for each external IP address
            available for translation.  When an internal address is
            assignened to an external address, dvbNiuNatIntIp will
            contained the mapped internal address."
       INDEX { dvbNiuNatExtIpType, dvbNiuNatExtIp }
   ::= { dvbNiuNatTable 1 }

   DvbNiuNatEntry ::= SEQUENCE {
       dvbNiuNatExtIpType InetAddressType,
       dvbNiuNatExtIp     InetAddress,
       dvbNiuNatIntIpType InetAddressType,
       dvbNiuNatIntIp     InetAddress,
       dvbNiuNatStatus    RowStatus
   }

   dvbNiuNatExtIpType OBJECT-TYPE

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       SYNTAX      InetAddressType
       MAX-ACCESS  not-accessible
       STATUS      current
       DESCRIPTION
           "The type of the external IP address available for NAT
            assignment"
   ::= { dvbNiuNatEntry 1 }

   dvbNiuNatExtIp OBJECT-TYPE
       SYNTAX      InetAddress (SIZE (1..64))
       MAX-ACCESS  not-accessible
       STATUS      current
       DESCRIPTION
           "An external IP address available for NAT assignment"
   ::= { dvbNiuNatEntry 2 }

   dvbNiuNatIntIpType OBJECT-TYPE
       SYNTAX      InetAddressType
       MAX-ACCESS  read-only
       STATUS      current
       DESCRIPTION
           "The type of the internal IP address assigned for NAT."
   ::= { dvbNiuNatEntry 3 }

   dvbNiuNatIntIp OBJECT-TYPE
       SYNTAX      InetAddress
       MAX-ACCESS  read-only
       STATUS      current
       DESCRIPTION
           "The internal IP address assigned to the external IP
            address. If no address is assigned this will be all 0's."
   ::= { dvbNiuNatEntry 4 }

   dvbNiuNatStatus OBJECT-TYPE
       SYNTAX      RowStatus
       MAX-ACCESS  read-create
       STATUS      current
       DESCRIPTION
           "This controls and reflects the status of the row.
            Rows can be created by using both createAndGo and
            createAndWait.  Rows can be modified/deleted ONLY if the
            dvbNiuNatIntIp is all 0's.  notInService can be applied to
            a row which currently has dvbNiuNatIntIp assigned, in this
            case when dvbNiuNatIntIp become free (all 0's) the
            associated dvbNiuNatExtIp cannot be used for further
            assigments."
   ::= { dvbNiuNatEntry 5 }

   -- End of NAT table


   -- ===============================================================
   -- =  NAPT Group                                                 =

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   -- ===============================================================

   dvbNiuNaptAddrType OBJECT-TYPE
       SYNTAX      InetAddressType
       MAX-ACCESS  read-write
       STATUS      current
       DESCRIPTION
           "The type of external IP address to be used for NAPT."
   ::= { dvbNiuNapt 1 }

   dvbNiuNaptAddr OBJECT-TYPE
       SYNTAX      InetAddress
       MAX-ACCESS  read-write
       STATUS      current
       DESCRIPTION
           "The external IP address to be used for NAPT.
            The filter table is used to identify internal
            addresses that require NAPT before entering the
            external domain (upstream).  In the downstream direction
            NAPT (inverse of the NAPT applied in the upstream) is
            applied before applying the IP filter table.  NAPT
            assignment algorithims are vendor dependant.  The value of
            all 0's specifies that NAPT is not available and the packet
            requiring it should be discarded.  A value with all bits
            set to 1 specifies that NAPT will use the IP address
            assigned to the HFC interface.

            NAPT is not applicable to multicast packets.

            At initial startup this object has the default value of
            all 0's"
   ::= { dvbNiuNapt 2 }

   -- NAPT assignment table

   dvbNiuNaptTable OBJECT-TYPE
       SYNTAX      SEQUENCE OF DvbNiuNaptEntry
       MAX-ACCESS  not-accessible
       STATUS      current
       DESCRIPTION
           "This table lists the current internal/external port
            assignments. The NAPT assignment algorithims used for port
            assignments are vendor dependant."
   ::= { dvbNiuNapt 3 }

   dvbNiuNaptEntry OBJECT-TYPE
       SYNTAX      DvbNiuNaptEntry
       MAX-ACCESS  not-accessible
       STATUS      current
       DESCRIPTION
           "A row should be created for each internal to external port
            mapping.  Each row contains the internal and external ports
            used in the mapping, and the internal IP address of the

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            host being mapped.  When the assignment is no longer
            required the row should be deleted."
       INDEX { dvbNiuNaptExtPort }
   ::= { dvbNiuNaptTable 1 }

   DvbNiuNaptEntry ::= SEQUENCE {
       dvbNiuNaptExtPort   Integer32,
       dvbNiuNaptIntPort   Integer32,
       dvbNiuNaptIntIpType InetAddressType,
       dvbNiuNaptIntIp     InetAddress
   }

   dvbNiuNaptExtPort OBJECT-TYPE
       SYNTAX      Integer32 (1..65535)
       MAX-ACCESS  not-accessible
       STATUS      current
       DESCRIPTION
           "The external port assigned to the internal port/IP
            Address."
   ::= { dvbNiuNaptEntry 1 }

   dvbNiuNaptIntPort OBJECT-TYPE
       SYNTAX      Integer32 (1..65535)
       MAX-ACCESS  read-only
       STATUS      current
       DESCRIPTION
           "The internal port that required mapping to the external
            port."
   ::= { dvbNiuNaptEntry 2 }

   dvbNiuNaptIntIpType OBJECT-TYPE
       SYNTAX      InetAddressType
       MAX-ACCESS  read-only
       STATUS      current
       DESCRIPTION
           "The internal IP address type."
   ::= { dvbNiuNaptEntry 3 }

   dvbNiuNaptIntIp OBJECT-TYPE
       SYNTAX      InetAddress
       MAX-ACCESS  read-only
       STATUS      current
       DESCRIPTION
           "The internal IP address of the host to which the port
            mapping is being applied."
   ::= { dvbNiuNaptEntry 4 }

   -- End of NAPT table

   -- ===============================================================
   -- =  Ethernet Filters Group                                     =
   -- ===============================================================


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   dvbNiuEthernetFilterEnable
    OBJECT-TYPE
       SYNTAX      INTEGER {
                       enabled(1),
                       countHits(2),
                       disabled(3)
                   }
       MAX-ACCESS  read-write
       STATUS      current
       DESCRIPTION
           "This controls the Ethernet filter table.
                enable     - Enables the Ethernet filter table.
                countHits  - This option is used to debug the filter
                             table.  It allows framess to be checked
                             against the filter table and increments
                             dvbNiuEthernetFilterMatches for a matching
                             filter, but ALL frames ARE ALLOWED
                             THROUGH.
                disabled   - Disables Ethernet filtering, all frames
                             are allowed through.

            At initial startup this object has the default value of
            disabled(3)."
   ::= { dvdNiuEthFilter 1 }

   dvbNiuEthernetFilterTable OBJECT-TYPE
       SYNTAX      SEQUENCE OF DvbNiuEthernetFilterEntry
       MAX-ACCESS  not-accessible
       STATUS      current
       DESCRIPTION
           "A list of filters to apply to Ethernet type frames to
            control the types of upper layer protocols that can be
            transported.  The EtherType/LLC field is examined and
            the filter table is checked to see if there is a filter
            for the protocol.  If no match is found the frame is
            discarded, otherwise the filter action is performed.

            The filter table does not have to be ordered as there
            can be only one possible match."
   ::= { dvdNiuEthFilter 2 }

   dvbNiuEthernetFilterEntry OBJECT-TYPE
       SYNTAX      DvbNiuEthernetFilterEntry
       MAX-ACCESS  not-accessible
       STATUS      current
       DESCRIPTION
           "Describes a filter to apply to Ethernet frame received on a
            specified interface.  The dvbNiuEthernetFilterProtocol in
            this table must match its respective fields in the frame
            for any given filter to match."
            INDEX { dvbNiuEthernetFilterIndex }
   ::= { dvbNiuEthernetFilterTable 1 }


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   DvbNiuEthernetFilterEntry ::= SEQUENCE {
       dvbNiuEthernetFilterIndex        Unsigned32,
       dvbNiuEthernetFilterStatus       RowStatus,
       dvbNiuEthernetFilterIfIndex      InterfaceIndexOrZero,
       dvbNiuEthernetFilterEtherType    INTEGER,
       dvbNiuEthernetFilterProtocol     Integer32,
       dvbNiuEthernetFilterAction       INTEGER,
       dvbNiuEthernetFilterMatches      Counter32
   }

   dvbNiuEthernetFilterIndex OBJECT-TYPE
       SYNTAX      Unsigned32
       MAX-ACCESS  not-accessible
       STATUS      current
       DESCRIPTION
           "The unique index for this row.  There are no ordering
            requirements for this table and any valid index may be
            specified."
   ::= { dvbNiuEthernetFilterEntry 1 }

   dvbNiuEthernetFilterStatus OBJECT-TYPE
       SYNTAX      RowStatus
       MAX-ACCESS  read-create
       STATUS      current
       DESCRIPTION
           "Controls and reflects the status of rows in this
            table.  Creation of the rows may be done via either
            create-and-wait or create-and-go, but the filter is
            not applied until this object is set to (or changes to)
            active. There is no restriction in changing any object
            in a row while this object is set to active."
   ::= { dvbNiuEthernetFilterEntry 2 }

   dvbNiuEthernetFilterIfIndex OBJECT-TYPE
       SYNTAX      InterfaceIndexOrZero
       MAX-ACCESS  read-create
       STATUS      current
       DESCRIPTION
           "The entry interface to which this filter applies. The
            value corresponds to ifIndex for either a CATV MAC or
            another network interface. If the value is zero, the
            filter applies to all interfaces. Default value in NIUs
            is the index of the customer-side (e.g. ethernet)
            interface."
   ::= { dvbNiuEthernetFilterEntry 3 }

   dvbNiuEthernetFilterEtherType OBJECT-TYPE
       SYNTAX      INTEGER {
                       ethernet2(1),
                       snap(2),
                       llc(3)
                   }
       MAX-ACCESS  read-create

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       STATUS      current
       DESCRIPTION
           "The format of the etherent frame.  This can be Ethernet2,
             802.2 SNAP or 802.2 LLC.  This is used to correctly
             locate the field identifying the protocol being
             transported."
   ::= { dvbNiuEthernetFilterEntry 4 }

   dvbNiuEthernetFilterProtocol OBJECT-TYPE
       SYNTAX      Integer32 (1..65535)
       MAX-ACCESS  read-create
       STATUS      current
       DESCRIPTION
           "The protocol to filter on.  For Ethernet2 and 802.2 SNAP
            the value in the EtherType field is checked.  For 802.2 LLC
            the valus in the SAP field is checked."
   ::= { dvbNiuEthernetFilterEntry 4 }

   dvbNiuEthernetFilterAction OBJECT-TYPE
       SYNTAX      INTEGER {
                       accept(1),
                       discard(2)
                   }
       MAX-ACCESS  read-create
       STATUS      current
       DESCRIPTION
           "The action to be taken when there is a filter match.  If
            it is accept, the frame will be forwarded otherwise
            the frame will be discarded."
   ::= { dvbNiuEthernetFilterEntry 5 }

   dvbNiuEthernetFilterMatches OBJECT-TYPE
       SYNTAX      Counter32
       MAX-ACCESS  read-create
       STATUS      current
       DESCRIPTION
           "Counts the number of times this filter was matched.
            This object is initialized to 0 at boot, or at row
            creation, and is reset only upon reboot."
   ::= { dvbNiuEthernetFilterEntry 6 }


   -- ===============================================================
   -- =  CPE IP Management and anti spoofing group                  =
   -- ===============================================================

   -- This CPE section is taken from RFC2669 and enhanced

   dvbNiuCpeEnroll OBJECT-TYPE
       SYNTAX      INTEGER {
                       none(1),
                       any(2),
                   }

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       MAX-ACCESS  read-write
       STATUS      current
       DESCRIPTION
           "This object controls the population of dvbNiuCpeTable.
            If set to none, the filters must be set manually.
            If set to any, the NIU sniffs the packets originating
            from the Ethernet and enrolls up to dvbNiuCpeIpMax
            addresses based on the source IP addresses of those
            packets. At initial system startup, default value for this
            object is any(2)."
   ::= { dvbNiuCpe 1 }

   dvbNiuCpeIpMax OBJECT-TYPE
       SYNTAX      Integer32 (-1..2147483647)
       MAX-ACCESS  read-write
       STATUS      current
       DESCRIPTION
           "This object controls the maximum number of CPEs allowed to
            connect behind this device. If set to zero, any number of
            CPEs may connect up to the maximum permitted for the
            device or the maximum allowed for the subnet configured for
            the CPE (subscriber) interface, whichever is the smaller.
            If set to -1, no filtering is done on CPE source addresses,
            and no entries are made in the dvbNiuCpeTable.
            If an attempt is made to set this to a number greater than
            that permitted for the device/subnet, it is set to that
            maximum of the smallest value (device or subnet).
            At initial system startup, default value for this object
            is -1."
   ::= { dvbNiuCpe 2 }

   dvbNiuCpeTable OBJECT-TYPE
       SYNTAX      SEQUENCE OF DvbNiuCpeEntry
       MAX-ACCESS  not-accessible
       STATUS      current
       DESCRIPTION
           "This table lists the IP addresses seen (or permitted)  as
            source addresses in packets originating from the customer
            interface on this device. In addition, this table can be
            provisioned with the specific addresses permitted for the
            CPEs via the normal row creation mechanisms."
   ::= { dvbNiuCpe 3 }

   dvbNiuCpeEntry OBJECT-TYPE
       SYNTAX      DvbNiuCpeEntry
       MAX-ACCESS  not-accessible
       STATUS      current
       DESCRIPTION
           "An entry in the dvbNiuCpeTable. There is one entry
            for each IP CPE seen or provisioned. If dvbNiuCpeIpMax
            is set to -1, this table is ignored, otherwise: Upon
            receipt of an IP  packet from the customer interface of the
            CM, the source IP address is checked against this table. If

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            the address is in the table, packet processing continues.

            If the address is not in the table, but dvbNiuCpeEnroll
            is set to any and the table size is less than
            dvbNiuCpeIpMax, the address is added to the table and
            packet processing continues. Otherwise, the packet is
            dropped.

            The filtering actions specified by this table occur after
            any Ethernet filtering (dvbNiuEthernetFilterTable), but
            prior to any IP filtering (dvbNiuIpFilterTable)."
       INDEX   { dvbNiuCpeAddrType, dvbNiuCpeIp }
   ::= { dvbNiuCpeTable 1 }

   DvbNiuCpeEntry ::= SEQUENCE {
       dvbNiuCpeIpType    InetAddressType,
       dvbNiuCpeIp        InetAddress,
       dvbNiuCpeMaskType  InetAddressType,
       dvbNiuCpeMask      InetAddress,
       dvbNiuCpeSource    INTEGER,
       dvbNiuCpeStatus    RowStatus
   }

   dvbNiuCpeIpType OBJECT-TYPE
       SYNTAX      InetAddressType
       MAX-ACCESS  not-accessible
       STATUS      current
       DESCRIPTION
           "The type of IP address used for the identified CPE."
   ::= { dvbNiuCpeEntry 1 }

   dvbNiuCpeIp OBJECT-TYPE
       SYNTAX      InetAddress
       MAX-ACCESS  not-accessible
       STATUS      current
       DESCRIPTION
           "The IP address to which this entry applies."
   ::= { dvbNiuCpeEntry 2 }


   dvbNiuCpeMaskType OBJECT-TYPE
       SYNTAX      InetAddressType
       MAX-ACCESS  read-create
       STATUS      current
       DESCRIPTION
           "The type of IP address for the CPE address mask."
   ::= { dvbNiuCpeEntry 3 }

   dvbNiuCpeMask OBJECT-TYPE
       SYNTAX      InetAddress
       MAX-ACCESS  read-create
       STATUS      current
       DESCRIPTION

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           "A bit mask that is to be applied to the CPE source IP
            address prior to matching. This mask is not necessarily
            the same as a subnet mask, but 1's bits must be leftmost
            and contiguous.  When created automatically this will be
            all 1's.  For manual entries, it can be used to represent a
            range (subnet) thus reducing the number of entries in the
            table."
   ::= { dvbNiuCpeEntry 4 }


   dvbNiuCpeSource OBJECT-TYPE
       SYNTAX      INTEGER {
                       other(1),
                       manual(2),
                       learned(3)
                   }
       MAX-ACCESS  read-only
       STATUS      current
       DESCRIPTION
           "This object describes how this entry was created. If the
            value is manual(2), this row was created by a network
            management action (either configuration, or SNMP set).
            If set to learned(3), then it was found via
            looking at the source IP address of a received packet."
   ::= { dvbNiuCpeEntry 5 }

   dvbNiuCpeStatus OBJECT-TYPE
       SYNTAX  RowStatus
       MAX-ACCESS  read-create
       STATUS  current
       DESCRIPTION
           "Controls and reflects the status of rows in this
            table.  Creation of the rows may be done via either
            create-and-wait or create-and-go. There is no restriction
            in changing any object in a row while this object is set to
            active."
   ::= { dvbNiuCpeEntry 6 }



   -- Conformance statements

   dvbNiuCompliance MODULE-COMPLIANCE
       STATUS      current
       DESCRIPTION
           "The compliance statement for EuroModem NIUs
            which implement the DVB-CABLE-NIU-MIB MIB.  An
            implmentation only has to support IPv4 addresses to be
            compliant."

   MODULE  -- dvbNiu
       MANDATORY-GROUPS { dvbNiuSystemGroup,
                          dvbNiuSoftwareGroup,

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                          dvbNiuEventGroup
                        }
       GROUP dvbNiuDhcpGroup
           DESCRIPTION
               "The group is optional but should be implemented if
                DHCP/BOOTP is implemented."

       GROUP dvbNiuIpFilterGroup
           DESCRIPTION
               "The group is optional but should be implemented if
                dvbNiuNatGroup or dvdNiuNaptGroup are implemeneted.
                The implementation of this group does not mandate the
                implementation of dvbNiuNatGroup or dvdNiuNaptGroup."

       GROUP dvbNiuNatGroup
           DESCRIPTION
               "The group is optional but should be implemented if NAT
                is implemented."

       GROUP dvbNiuNaptGroup
           DESCRIPTION
               "The group is optional but should be implemented if NAPT
                is implemented."

       GROUP dvbNiuEthFilterGroup
           DESCRIPTION
               "The group is optional but should be implemented if
                Ethernet filtering is implemented.  If the NIU supports
                bridging then it is strongly recommended this group is
                implemented."

       GROUP dvbNiuCpeGroup
           DESCRIPTION
               "The group is optional but should be implemented to
                prevent spoofing type attacks and restrict the number
                of CPE devices attached to the NIU."

       OBJECT dvbNiuStaticIpMaskType
          SYNTAX  InetAddressType { ipv4(1)}
          DESCRIPTION
              "An implementation is only required to support IPv4
               addresses."

       OBJECT dvbNiuStaticIpMask
          SYNTAX  InetAddress (SIZE(4))
          DESCRIPTION
              "An implementation is only required to support IPv4
               addresses."

       OBJECT dvbNiuSwServerAddrType
          SYNTAX  InetAddressType { ipv4(1)}
          DESCRIPTION
              "An implementation is only required to support IPv4

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               addresses."

       OBJECT dvbNiuSwServer
          SYNTAX  InetAddress (SIZE(4))
          DESCRIPTION
              "An implementation is only required to support IPv4
               addresses."

       OBJECT dvbNiuDhcpServerAddrType
          SYNTAX  InetAddressType { ipv4(1)}
          DESCRIPTION
              "An implementation is only required to support IPv4
               addresses."

       OBJECT dvbNiuDhcpServer
          SYNTAX  InetAddress (SIZE(4))
          DESCRIPTION
              "An implementation is only required to support IPv4
               addresses.  The broadcast address to be used for IPv4 is
               255.255.255.255 and should be the default value."

       OBJECT dvbNiuIpFilterDstAddrType
          SYNTAX  InetAddressType { ipv4(1)}
          DESCRIPTION
              "An implementation is only required to support IPv4
               addresses."

       OBJECT dvbNiuIpFilterDstAddr
          SYNTAX  InetAddress (SIZE(4))
          DESCRIPTION
              "An implementation is only required to support IPv4
               addresses. The default value for this object for IPv4 is
               0.0.0.0"

       OBJECT dvbNiuIpFilterSrcAddrType
          SYNTAX  InetAddressType { ipv4(1)}
          DESCRIPTION
              "An implementation is only required to support IPv4
               addresses."

       OBJECT dvbNiuIpFilterSrcAddr
          SYNTAX  InetAddress (SIZE(4))
          DESCRIPTION
              "An implementation is only required to support IPv4
               addresses. The default value for this object for IPv4 is
               0.0.0.0"

       OBJECT dvbNiuIpFilterDstMaskType
          SYNTAX  InetAddressType { ipv4(1)}
          DESCRIPTION
              "An implementation is only required to support IPv4
               addresses."


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       OBJECT dvbNiuIpFilterDstMask
          SYNTAX  InetAddress (SIZE(4))
          DESCRIPTION
              "An implementation is only required to support IPv4
               addresses. The default value for this object for IPv4 is
               0.0.0.0"

       OBJECT dvbNiuIpFilterSrcMaskType
          SYNTAX  InetAddressType { ipv4(1)}
          DESCRIPTION
              "An implementation is only required to support IPv4
               addresses."

       OBJECT dvbNiuIpFilterSrcMask
          SYNTAX  InetAddress (SIZE(4))
          DESCRIPTION
              "An implementation is only required to support IPv4
               addresses. The default value for this object for IPv4 is
               0.0.0.0"

       OBJECT dvbNiuNatIntIpType
          SYNTAX  InetAddressType { ipv4(1)}
          DESCRIPTION
              "An implementation is only required to support IPv4
               addresses."

       OBJECT dvbNiuNatIntIp
          SYNTAX  InetAddress (SIZE(4))
          DESCRIPTION
              "An implementation is only required to support IPv4
               addresses."

       OBJECT dvbNiuNaptAddrType
          SYNTAX  InetAddressType { ipv4(1)}
          DESCRIPTION
              "An implementation is only required to support IPv4
               addresses."

       OBJECT dvbNiuNaptAddr
          SYNTAX  InetAddress (SIZE(4))
          DESCRIPTION
              "An implementation is only required to support IPv4
               addresses."

       OBJECT dvbNiuNaptIntIpType
          SYNTAX  InetAddressType { ipv4(1)}
          DESCRIPTION
              "An implementation is only required to support IPv4
               addresses."

       OBJECT dvbNiuNaptIntIp
          SYNTAX  InetAddress (SIZE(4))
          DESCRIPTION

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              "An implementation is only required to support IPv4
               addresses."

       OBJECT dvbNiuCpeIpType
          SYNTAX  InetAddressType { ipv4(1)}
          DESCRIPTION
              "An implementation is only required to support IPv4
               addresses."

       OBJECT dvbNiuCpeIp
          SYNTAX  InetAddress (SIZE(4))
          DESCRIPTION
              "An implementation is only required to support IPv4
               addresses."

       OBJECT dvbNiuCpeMaskType
          SYNTAX  InetAddressType { ipv4(1)}
          DESCRIPTION
              "An implementation is only required to support IPv4
               addresses."

       OBJECT dvbNiuCpeMask
          SYNTAX  InetAddress (SIZE(4))
          DESCRIPTION
              "An implementation is only required to support IPv4
               addresses."

   ::= { dvbNiuCompliances 1 }

   dvbNiuSystemGroup OBJECT-GROUP
       OBJECTS     {
                     dvbNiuConfigSet,
                     dvbNiuMibVersion,
                     dvbNiuSerialNum,
                     dvbNiuResetNow,
                     dvbNiuResetCounts,
                     dvbNiuDateAndTime,
                     dvbNiuOperStatus,
                     dvbNiuModemtype,
                     dvbNiuStaticIpMaskType,
                     dvbNiuStaticIpMask,
                     dvbNiuStaticIpStatus,
                     dvbNiuEuroloader,
                     dvbNiuImplSet,
                     dvbNiuMulticast
                   }
       STATUS      current
       DESCRIPTION
           "A collection of objects providing basic system level
            control and instrumentation of the EuroModem."
   ::= { dvbNiuGroups 1 }

   dvbNiuSoftwareGroup OBJECT-GROUP

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       OBJECTS     {
                     dvbNiuSwVersion,
                     dvbNiuSwState,
                     dvbNiuSwAction,
                     dvbNiuSwDateTime,
                     dvbNiuSwServerAddrType,
                     dvbNiuSwServer,
                     dvbNiuSwFilename,
                     dvbNiuSwDownloadSlot,
                     dvbNiuSwAdminStatus
                   }
       STATUS      current
       DESCRIPTION
           "A collection of objects providing control and
            instrumentation of the EuroModem's software."
   ::= { dvbNiuGroups 2 }

   dvbNiuDhcpGroup OBJECT-GROUP
       OBJECTS     {
                     dvbNiuDhcpServerAddrType,
                     dvbNiuDhcpServer,
                     dvbNiuDhcpRelay,
                     dvdNiuDhcpReqIf,
                     dvbNiuDhcpState,
                     dvbNiuDhcpSerType,
                     dvbNiuDhcpStatus
                   }
       STATUS      current
       DESCRIPTION
           "A collection of objects providing control over the
            EuroModem's DHCP/Bootp functionality."
   ::= { dvbNiuGroups 3 }

   dvbNiuEventGroup OBJECT-GROUP
       OBJECTS     {
                     dvbNiuEventPolicy,
                     dvbNiuEventControlTable,
                     dvbNiuEventTableMaxSize,
                     dvbNiuTrapRate,
                     dvbNiuEventControlPriority,
                     dvbNiuEventControlAction,
                     dvbNiuEventType,
                     dvbEventDateTime,
                     dvbEventDescription,
                     dvbEventCode,
                     dvbEventStatus,
                     dvbNiuEvThrottleAdminStatus,
                     dvbNiuEvThrottleInhibited,
                     dvbNiuEvThrottleThreshold,
                     dvbNiuEvThrottleInterval
                   }
       STATUS      current
       DESCRIPTION

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           "A collection of objects used to control and monitor
            EuroModem events."
   ::= { dvbNiuGroups 4 }

   dvbNiuIpFilterGroup OBJECT-GROUP
       OBJECTS     {
                     dvbNiuIpFilterDstAddrType,
                     dvbNiuIpFilterDstAddr,
                     dvbNiuIpFilterDstMaskType,
                     dvbNiuIpFilterDstMask,
                     dvbNiuIpFilterStatus,
                     dvbNiuIpFilterProtocol,
                     dvbNiuIpFilterIfIndex,
                     dvbNiuIpFilterSrcPortLow,
                     dvbNiuIpFilterDirection,
                     dvbNiuIpFilterSrcPortHigh,
                     dvbNiuIpFilterTos,
                     dvbNiuIpFilterDstPortLow,
                     dvbNiuIpFilterTosMask,
                     dvbNiuIpFilterDstPortHigh,
                     dvbNiuIpFilterSrcAddrType,
                     dvbNiuIpFilterSrcAddr,
                     dvbNiuIpFilterAction,
                     dvbNiuIpFilterMatches,
                     dvbNiuIpFilterSrcMaskType,
                     dvbNiuIpFilterSrcMask,
                     dvbNiuIpFilterContinue,
                     dvbNiuIpFilterEnable,
                     dvbNiuIpTosMapIndex,
                     dvbNiuIpTosMapStatus,
                     dvbNiuIpTosMapAndMask,
                     dvbNiuIpTosMapOrMask
                   }
       STATUS      current
       DESCRIPTION
           "A collection of objects providing a filtering capability
            at the IP layer."
   ::= { dvbNiuGroups 5 }

   dvbNiuEthFilterGroup OBJECT-GROUP
       OBJECTS     {
                     dvbNiuEthernetFilterStatus,
                     dvbNiuEthernetFilterIfIndex,
                     dvbNiuEthernetFilterEtherType,
                     dvbNiuEthernetFilterAction,
                     dvbNiuEthernetFilterMatches,
                     dvbNiuEthernetFilterEnable
                   }
       STATUS      current
       DESCRIPTION
           "A collection of objects providing a filtering capability
            at the Ethernet layer."
   ::= { dvbNiuGroups 6 }

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   dvbNiuNatGroup OBJECT-GROUP
       OBJECTS     {
                     dvbNiuNatIntIpType,
                     dvbNiuNatIntIp,
                     dvbNiuNatStatus
                   }
       STATUS      current
       DESCRIPTION
           "A collection of objects providing address translation at
            either the address level"
   ::= { dvbNiuGroups 7 }

   dvbNiuNaptGroup OBJECT-GROUP
       OBJECTS     {
                     dvbNiuNaptAddrType,
                     dvbNiuNaptAddr,
                     dvbNiuNaptIntPort,
                     dvbNiuNaptIntIpType,
                     dvbNiuNaptIntIp
                   }
       STATUS      current
       DESCRIPTION
           "A collection of objects providing address translation at
            either the port level"
   ::= { dvbNiuGroups 8 }

   dvbNiuCpeGroup OBJECT-GROUP
       OBJECTS     {
                     dvbNiuCpeEnroll,
                     dvbNiuCpeIpMax,
                     dvbNiuCpeIpType,
                     dvbNiuCpeIp,
                     dvbNiuCpeMaskType,
                     dvbNiuCpeMask,
                     dvbNiuCpeSource,
                     dvbNiuCpeStatus
                   }
       STATUS      current
       DESCRIPTION
           "A collection of objects providing anti spoofing / CPE
            address management"
   ::= { dvbNiuGroups 9 }

   END

5. Security Considerations

   This MIB relates to a system which will provide metropolitan public
   internet access.  As such, improper manipulation of the objects
   represented by this MIB may result in denial of service to a large
   number of end-users.  In addition, manipulation of
   dvbNiuEthernetFilterTable and dvbNiuIpFilterTable may allow an end-

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   user to increase their service levels, spoof their IP addresses or
   affect other end-users in either a positive or negative manner.

   There are a number of management objects defined in this MIB that
   have a MAX-ACCESS clause of read-write and/or read-create.  Such
   objects may be considered sensitive or vulnerable in some network
   environments.  The support for SET operations in a non-secure
   environment without proper protection can have a negative effect on
   network operations.  In addition to those mentioned above:

   o    dvbNiuStaticIpTable and dvbNiuDhcpTable can be manipulated to
        prevent IP addresses being assigned to the NIU after a reset,
        which results in a denial of service.

   o    The NIU may have its software changed by the actions of the
        management system.  An improper software load may result in
        substantial vulnerabilities and the loss of the ability of the
        management system to control the NIU.

   o    Setting dvbDevEvThrottleAdminStatus = unconstrained(1) may
        cause flooding of traps, which can disrupt network service.

   This MIB does not affect confidentiality of services on a cable
   system. The DVB/DAVIC Interoperability Consortium expects to produce
   a MIB for the security mechanism in the near future.

   SNMPv1 by itself is not a secure environment. Even if the network
   itself is secure (for example by using IPSec), even then, there is
   no control as to who on the secure network is allowed to access and
   GET/SET (read/change/create/delete) the objects in this MIB. It is
   recommended that the implementers consider the security features as
   provided by the SNMPv3 framework. Specifically, the use of the User-
   based Security Model RFC 2574 [RFC2574] and the View- based Access
   Control Model RFC 2575 [RFC2575] is recommended.

   It is then a customer/user responsibility to ensure that the SNMP
   entity giving access to an instance of this MIB, is properly
   configured to give access to the objects only to those principals
   (users) that have legitimate rights to indeed GET or SET
   (change/create/delete) them.



6. References

   [RFC2571]   Harrington, D., Presuhn, R., and B. Wijnen,
               "An Architecture for Describing SNMP Management
               Frameworks", RFC 2571, April 1999.

   [RFC1155]   Rose, M., and K. McCloghrie,
               "Structure and Identification of Management Information
               for TCP/IP-based Internets", STD 16, RFC 1155, May 1990.


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   [RFC1212]   Rose, M., and K. McCloghrie,
               "Concise MIB Definitions", STD 16, RFC 1212, March 1991.

   [RFC1215]   M. Rose,
               "A Convention for Defining Traps for use with the SNMP",
               RFC 1215, March 1991.

   [RFC2578]   McCloghrie, K., Perkins, D., Schoenwaelder, J., Case,J.,
               Rose, M., and S. Waldbusser, "Structure of Management
               Information Version 2 (SMIv2)", STD 58, RFC 2578, April
               1999.

   [RFC2579]   McCloghrie, K., Perkins, D., Schoenwaelder, J., Case,
               J., Rose, M., and S. Waldbusser, "Textual Conventions
               for SMIv2", STD 58, RFC 2579, April 1999.

   [RFC2580]   McCloghrie, K., Perkins, D., Schoenwaelder, J., Case,
               J., Rose, M., and S. Waldbusser, "Conformance Statements
               for SMIv2", STD 58, RFC 2580, April 1999.

   [RFC1157]   Case, J., Fedor, M., Schoffstall, M., and J. Davin,
               "Simple Network Management Protocol", STD 15, RFC 1157,
               May 1990.

   [RFC1901]   Case, J., McCloghrie, K., Rose, M., and S. Waldbusser,
               "Introduction to Community-based SNMPv2", RFC 1901,
               January 1996.

   [RFC1906]   Case, J., McCloghrie, K., Rose, M., and S. Waldbusser,
               "Transport Mappings for Version 2 of the Simple Network
               Management Protocol (SNMPv2)", RFC 1906, January 1996.

   [RFC2572]   Case, J., Harrington D., Presuhn R., and B. Wijnen,
               "Message Processing and Dispatching for the Simple
               Network Management Protocol (SNMP)", RFC 2572, April
               1999.

   [RFC2574]   Blumenthal, U., and B. Wijnen, "User-based Security
               Model (USM) for version 3 of the Simple Network
               Management Protocol (SNMPv3)", RFC 2574, April 1999.

   [RFC1905]   Case, J., McCloghrie, K., Rose, M., and S. Waldbusser,
               "Protocol Operations for Version 2 of the Simple Network
               Management Protocol (SNMPv2)", RFC 1905, January 1996.

   [RFC2573]   Levi, D., Meyer, P., and B. Stewart, "SNMPv3
               Applications", RFC 2573, April 1999.

   [RFC2575]   Wijnen, B., Presuhn, R., and K. McCloghrie, "View-based
               Access Control Model (VACM) for the Simple Network
               Management Protocol (SNMP)", RFC 2575, April 1999.

   [RFC2570]   Case, J., Mundy, R., Partain, D., and B. Stewart,

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                 DVB Cable Network Interface Unit MIB    February 2001


               "Introduction to Version 3 of the Internet-standard
               Network Management Framework", RFC 2570, April 1999.

   [RFC1224]   Steinberg, L., "Techniques for Managing Asynchronously
               Generated Alerts", RFC 1224, May 1991.

   [RFC2119]   Bradner, S., "Key words for use in RFCs to Indicate
               Requirement Levels", BCP 14, RFC 2119, March 1997.

   [RFC2851]   M. Daniele, B. Haberman, S. Routhier, J. Schoenwaelder,
               "Textual Conventions for Internet Network Addresses",
               June 2000

   [EUROM]     ECCA,"Technical Specification of a European Cable Modem
               for digital bi-directional communications via cable
               networks", Version 1.0, 12th May 1999


7. Acknowledgments

   This MIB was the result of the work undertaken by DVB/DAVIC
   Interoperability consortium to define a common management interface
   for EuroModem compliant NIU.

   RFC 2669 edited by Michael St Johns was used as the template for
   this document.


8. Author's Addresses

   Andrew Valentine
   Engineering Design Centre
   Hughes Network Systems Ltd
   Saxon Street,
   Linford Wood,
   Milton Keynes.
   MK14 6LD
   ENGLAND
   Phone: +44 1908 221122
   Email: a.valentine@eu.hns.com














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