Network Working Group Barr Hibbs
INTERNET-DRAFT (no affiliation)
Category: Standards Track Glenn Waters
Nortel Networks
October 2003
Dynamic Host Configuration Protocol for IPv4 (DHCPv4) Server MIB
<draft-ietf-dhc-server-mib-09.txt>
Saved Monday, October 27, 2003, 5:08:01 PM
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 made obsolete 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/1id-abstracts.html.
The list of Internet-Draft Shadow Directories can be accessed at
http://www.ietf.org/shadow.html.
Copyright Notice
Copyright (C), 2003, The Internet Society. All Rights Reserved.
Abstract
This memo defines an experimental portion of the Management
Information Base (MIB) for use with network management protocols in
the Internet Community. In particular, it defines objects used for
the management of Dynamic Host Configuration Protocol for IPv4
(DHCPv4) and Bootstrap Protocol (BOOTP) servers.
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Table of Contents
1. Introduction...................................................2
2. The Internet-Standard Management Framework.....................3
3. Overview.......................................................3
3.1. Relationship to Other MIBs.................................4
3.1.1. DHCP MIB Extensions...................................4
3.1.2. Host System MIB Extensions............................4
3.1.3. DHCP Client MIB Extensions............................4
3.1.4. DHCP Relay Agent MIB Extensions.......................5
3.1.5. DHCPv6 MIB Extensions.................................5
3.2. Textual Conventions Introduced in this MIB.................5
3.2.1. DhcpTimeInterval......................................5
3.2.2. DhcpPhysicalAddress...................................5
3.3. BOOTP and DHCP Counter Groups..............................5
3.4. BOOTP and DHCP Optional Statistics Group...................6
3.5. Response Times and ICMP Echo...............................8
4. Definitions....................................................9
5. Intellectual Property.........................................43
6. Acknowledgements..............................................43
7. IANA Considerations...........................................43
8. Security Considerations.......................................44
9. References....................................................45
9.1. Normative References......................................45
9.2. Informative References....................................46
10. Editors' Addresses...........................................46
11. Full Copyright Statement.....................................46
1. Introduction
This memo is a product of the DHCP Working Group and defines a
portion of the Management Information Base (MIB) for use with network
management protocols in the Internet community. In particular, it
describes a set of extensions that DHCPv4 and Bootstrap Protocol
(BOOTP) servers implement. Many implementations support both DHCPv4
and BOOTP within a single server and hence this memo describes the
MIB for both DHCPv4 and BOOTP servers.
This memo does not cover DHCPv4/BOOTP client nor relay agent MIB
extensions: these are possibly the subjects of future investigation
[see discussion in section 3.1.] Also excluded from this MIB
extension in the interest of simplicity are DHCP Dynamic DNS
Updating, Failover, Authentication, and Load Balancing: these
functions and features could be subjects of future MIB extensions.
Provision is also made for Standards-Track additions to the DHCP
Message Type (option 61.)
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This memo is based on the Internet-standard Network Management
Framework as defined by documents [RFC2578, RFC2579, RFC2580].
Objects defined in this MIB allow access to and control of DHCP
Server Software. Servers MAY also provide additional management
capabilities using the Applications MIB [RFC2287].
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].
2. The Internet-Standard Management Framework
For a detailed overview of the documents that describe the current
Internet-Standard Management Framework, please refer to section 7 of
RFC 3410 [RFC3410], Managed objects are accessed via a virtual
information store, termed the Management Information Base or MIB.
MIB objects are generally accessed through the Simple Network
Management Protocol (SNMP). Objects in the MIB are defined using the
mechanisms defined in the Structure of Management Information (SMI).
This memo specifies a MIB module that is compliant to the SMIv2,
which is described in STD 58, [RFC2578], STD 58, [RFC2579] and STD
58, [RFC2580].
3. Overview
In the tradition of the Simple Network Management Protocol (SNMP),
the minimum number of objects possible is defined in this MIB, while
still providing as rich a set of management information as possible.
An object is left out of this MIB when it can be derived from other
objects that are provided. Further to the tradition of the SNMP,
computationally intense operations are left to the domain of the
management station. Thus, this MIB provides a set of objects from
which other management information may be derived.
Provision for future extensions to cover DHCPv4 clients and relay
agents, and DHCPv6 extensions are implied by the top-level structure
illustrated in section 3.1.1.
The examples provided in sections 3.3 through 3.5 are not meant to be
comprehensive but are illustrative of the potential uses of the
objects defined by this MIB.
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3.1. Relationship to Other MIBs
3.1.1. DHCP MIB Extensions
The DHCP MIB extensions will be the "dhcp" branch of the standard
MIB-2 tree, as illustrated by the following diagram:
+-------+
| MIB-2 |
+---+---+
|
|
+---+---+
| dhcp |
+---+---+
|
|
+--------------+---------------+----------------+
| | | |
+-----+-----+ +-----+----+ +-------+-------+ +-----+-----+
| dhcp-v4 | | dhcp-v4 | | dhcp-v4 | |dhcp-v6 MIB|
|Server MIB | |Client MIB| |Relay Agent MIB| |Extensions |
|(this memo)| | (future) | | (future work) | | (future) |
+-----------+ +----------+ +---------------+ +-----------+
The DHCP MIBs will share a common branching point but will be
independently defined by individual memos.
3.1.2. Host System MIB Extensions
The Host System MIB [RFC1123] provides for information, command, and
control of the host computer system on which a DHCP server resides.
The DHCP Server MIB specifically does not include any objects that
may be accessible using the Host System MIB.
3.1.3. DHCP Client MIB Extensions
Development of this set of MIB extensions is a natural path given the
increasing interest in desktop and client system management. It will
share a common branch point in the MIB tree with the other DHCP MIB
Extensions, and may use many of the same textual conventions.
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3.1.4. DHCP Relay Agent MIB Extensions
If this set of MIB extensions is ever developed, it will share a
common branch point in the MIB tree with the other DHCP MIB
Extensions, and will use many of the same textual conventions.
3.1.5. DHCPv6 MIB Extensions
If this set of MIB extensions is ever developed, it will share a
common branch point in the MIB tree with the other DHCP MIB
Extensions, and will likely use very different textual conventions as
the protocol differs significantly from DHCPv4.
3.2. Textual Conventions Introduced in this MIB
Several conceptual data types have been introduced as textual
conventions in this DHCP MIB document. These additions will
facilitate the common understanding of information used by the DHCP
server. No changes to the SMI or the SNMP are necessary to support
these conventions.
3.2.1. DhcpTimeInterval
This data type measures time intervals since the beginning of some
epoch, measured in milliseconds. DhcpTimeInterval is intended
exclusively for use in various statistics, such as in the subtrees
"bootpOptionalStatistics" and "dhcpv4OptionalStatistics."
3.2.2. DhcpPhysicalAddress
This data type contains the type of hardware address represented by
MacAddress, as defined for ARP messages.
The length in octets of MacAddress is contained in this type.
The actual layer 1 hardware address is contained in this data type.
3.3. BOOTP and DHCP Counter Groups
This section describes some of the management information that may be
derived from the objects provided in the counter groups.
The total number of valid DHCP packets received by the server is
computed as the sum of the "dhcpv4CountDiscovers,"
"dhcpv4CountRequests," "dhcpv4CountReleases," "dhcpv4CountDeclines,"
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"dhcpv4CountInforms," and "dhcpv4CountLeaseQueries objects." The
total number of valid packets (BOOTP and DHCP) received is computed
as the total number of valid DHCP packets plus the value of the
"bootpCountRequests" object. The total number of packets received is
computed as the total number of valid packets plus the sum of
"bootpCountInvalids" and "dhcpv4CountInvalids."
Similar to the received computations, the total number of DHCP
packets sent by the server is computed as the sum of the
"dhcpv4CountOffers," "dhcpv4CountAcks," and "dhcpv4CountNaks"
objects. The number of packets (BOOTP and DHCP) sent by the server
is computed as the total number of DHCP packets sent plus the value
of the "bootpCountReplies" object.
3.4. BOOTP and DHCP Optional Statistics Group
This section describes some of the management information that may be
derived from the objects provided in the optional statistics group.
Given time 1 (t1) and time 2 (t2) greater than t1, the mean inter-
arrival time of valid DHCP messages for the interval t1 to t2 can be
computed as (dhcpv4StatLastArrivalTime at t2 minus
dhcpv4StatLastArrivalTime at t1) divided by (valid DHCP received
packet count at t2 minus valid DHCP received packet count at t1).
Under the simplifying assumption that the capture of packet counts
and times is discontinuous (that is, for the measurement interval the
captured data represents the complete set for the server) the
variance of the mean may be computed as
(dhcpv4StatSumSquaresArrivalTime at t2 less
dhcpv4StatSumSquaresArrivalTime at t1) divided by (valid DHCP
received packet count at t2 less valid DHCP received packet count at
t1). Standard deviation of the mean is the square root of the
variance.
Calculation of statistics for message response time is entirely
similar to the calculations for inter-arrival time, except that the
response time objects are used for the calculations.
Calculation of statistics for BOOTP is similar to the calculations
for DHCP, except that the similar objects from the
bootpOptionalStatistics group are used instead of the objects from
dhcpv4OptionalStatistics group, server Configuration Group
The server configuration group contains objects that describe the
configuration information that is contained in the server. Some of
the configuration information is static (e.g., a statically
configured IP address) and some of the configuration is dynamic
(e.g., an assigned DHCP lease). The intent of the server
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configuration group is to be able to read the server's configuration.
Mechanisms outside of the SNMP are currently in use (e.g., vendor
defined solutions) and are being standardized (e.g., the Directory
Enabled Networks [DEN] initiative) to update a server's
configuration.
The configuration information defines a minimal set of information
that most servers should be able to provide. Each row of the
dhcpv4ServerSubnetTable lists the subnet, the subnet mask, and the
subnet that is equivalent to this subnet. Equivalence is defined as
more than one subnet being present on the same network segment as
some other subnet.
The dhcpv4ServerRangeTable lists the start and end IP addresses of
the ranges and the subnet of which the range is a member. The
dhcpv4ServerRangeInUse object indicates the amount of the range that
is currently in use, either through dynamic allocation or being
reserved. The range size can be computed by taking the difference of
the "dhcpv4ServerRangeStartAddress" and "dhcpv4ServerRangeEndAddress"
objects.
The dhcpv4ServerAddressTable provides information about the static
and dynamic addresses that the server contains in its configuration.
Addresses may be:
o Static, in which case they are predefined though the server's
configuration. Static addresses may or may not have been
previously served by the server;
o Dynamic, in which case the server has served the addresses and
it is currently in active use by a host;
o Expired, in which case the server had previously assigned for
which the lease time has expired, but is retained by the server
for possible future use by the same client;
o Configuration-reserved, in which case the address is not
available for the server to allocate to a client. A
configuration-reserved address is one that has been reserved by
the administrator. An example of a configuration-reserved
address is an address that is assigned to a client, not through
DHCP (e.g., statically assigned), and the address is within a
DHCP range; and
o Server-reserved, in which case the server has taken the address
out of use. Examples of server-reserved addresses are those
that have been declined (i.e., through a DHCPDECLINE) by a
client or those that have responded to an ICMP echo before they
were assigned.
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The protocol used to allocate the address may be determined from the
"dhcpv4ServerAddressServedProtocol" object. This object indicates
whether the address has never been served, or whether BOOTP or DHCP
was used to allocate the address.
3.5. Response Times and ICMP Echo
According to [RFC2131], servers SHOULD try to determine if an address
is in use before assigning it. Some servers choose not to perform
this check, letting the client determine for itself if the address is
in use. Other servers perform an ICMP echo (Ping) just prior to
assigning an address. Servers that perform a Ping before responding
to a DHCPDISCOVER should not include in the response time the time
from when the Ping was transmitted until the time that either a
response was received or that the server timed out waiting for a
response.
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4. Definitions
DHCP-SERVER-MIB DEFINITIONS ::= BEGIN
IMPORTS
Counter64, Counter32, Gauge32, Unsigned32, MODULE-IDENTITY,
OBJECT-TYPE, OBJECT-IDENTITY, NOTIFICATION-TYPE, mib-2
FROM SNMPv2-SMI
TEXTUAL-CONVENTION, DateAndTime FROM SNMPv2-TC
SnmpAdminString FROM SNMP-FRAMEWORK-MIB
InetAddressIPv4, InetAddressPrefixLength
FROM INET-ADDRESS-MIB
MODULE-COMPLIANCE, OBJECT-GROUP, NOTIFICATION-GROUP
FROM SNMPv2-CONF;
dhcp MODULE-IDENTITY
LAST-UPDATED "200310271708Z"
ORGANIZATION
"IETF DHC Working Group
General Discussion: dhcwg@ietf.org
Subscribe: http://www1.ietf.org/mailman/listinfo/dhcwg
Archive: http://www1.ietf.org/mailman/listinfo/dhcwg
Chair: Ralph Droms, rdroms@cisco.com"
CONTACT-INFO
" Richard Barr Hibbs
Postal: 952 Sanchez Street
San Francisco, California 94114-3362
USA
Tel: +1-(415)-648-3920
Fax: +1-(415)-648-9017
E-mail: rbhibbs@pacbell.net
Glenn Waters
Postal: Nortel Networks, Inc.
310-875 Carling Avenue
Ottawa, Ontario K1S 5P1
Canada
Tel: +1-(613)-798-4925
E-mail: gww@NortelNetworks.com"
DESCRIPTION
"The MIB module for entities implementing the server side of
the Bootstrap Protocol (BOOTP) and the Dynamic Host
Configuration protocol (DHCP) for Internet Protocol version
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4(IPv4). This MIB does not include support for Dynamic DNS
(DDNS) updating nor for the DHCP Failover Protocol.
Copyright (C) The Internet Society (2003). This version of
this MIB module is part of RFC xxxx; see the RFC itself for
full legal notices."
-- RFC Editor assigns xxxx and removes this comment
REVISION "200310271708Z" -- 27 October 2003
DESCRIPTION "Initial Version, published as RFC xxxx."
-- RFC Editor assigns xxxx and removes this comment
::= { mib-2 TBD } -- IANA will make official assignment
-- Textual conventions defined by this memo
DhcpTimeInterval ::= TEXTUAL-CONVENTION
STATUS current
DESCRIPTION
"The number of milliseconds that has elapsed since some epoch.
Systems that cannot measure events to the millisecond
resolution SHOULD round this value to the next available
resolution that the system supports."
SYNTAX Unsigned32
DhcpPhysicalAddress ::= TEXTUAL-CONVENTION
DISPLAY-HINT "1d,1d,1x:"
STATUS current
DESCRIPTION
"A DHCP-specific encoding of the physical address type and
physical address, intended to mirror the representation of
physical addresses in DHCP messages. The first octet of this
object contains the hardware type from the 'htype' field of the
DHCP message, the second octet of this object contains the
hardware length from the 'hlen' field, and the remaining octets
contain the hardware address from the 'chaddr' field."
REFERENCE "RFC 2131"
SYNTAX OCTET STRING (SIZE(3..18))
-- declare top-level MIB objects
dhcpv4Server OBJECT-IDENTITY
STATUS current
DESCRIPTION
"DHCPv4 Server MIB objects are defined in this branch."
::= { dhcp 1 }
-- dhcpv4Client OBJECT-IDENTITY
-- STATUS future
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-- DESCRIPTION
-- "DHCPv4 Client MIB objects are defined in this branch."
-- ::= { dhcp 2 }
-- dhcpv4Relay OBJECT-IDENTITY
-- STATUS future
-- DESCRIPTION
-- "DHCPv4 Relay Agent MIB objects are defined in this branch."
-- ::= { dhcp 3 }
-- dhcpv6Server OBJECT-IDENTITY
-- STATUS future
-- DESCRIPTION
-- "DHCPv6 Server MIB objects are defined in this branch."
-- ::= { dhcp 4 }
dhcpv4ServerObjects OBJECT-IDENTITY
STATUS current
DESCRIPTION
"DHCP Server MIB server identification objects are all defined
in this branch."
::= { dhcpv4Server 1 }
dhcpv4ServerSystem OBJECT-IDENTITY
STATUS current
DESCRIPTION
"Group of objects that are related to the overall system."
::= { dhcpv4ServerObjects 1 }
bootpCounters OBJECT-IDENTITY
STATUS current
DESCRIPTION
"Group of objects that count various BOOTP events."
::= { dhcpv4ServerObjects 2 }
dhcpv4Counters OBJECT-IDENTITY
STATUS current
DESCRIPTION
"Group of objects that count various DHCPv4 events."
::= { dhcpv4ServerObjects 3 }
bootpOptionalStatistics OBJECT-IDENTITY
STATUS current
DESCRIPTION
"Group of objects that measure various BOOTP statistics."
::= { dhcpv4ServerObjects 4 }
dhcpv4OptionalStatistics OBJECT-IDENTITY
STATUS current
DESCRIPTION
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"Group of objects that measure various DHCPv4 statistics."
::= { dhcpv4ServerObjects 5 }
dhcpv4ServerConfiguration OBJECT-IDENTITY
STATUS current
DESCRIPTION
"Objects that contain pre-configured and dynamic configuration
information."
::= { dhcpv4ServerObjects 6 }
dhcpv4ServerNotifyObjects OBJECT-IDENTITY
STATUS current
DESCRIPTION
"Objects that are used only in notifications."
::= { dhcpv4ServerObjects 7 }
-- dhcpv4ServerSystemObjects Group
dhcpv4ServerSystemDescr OBJECT-TYPE
SYNTAX SnmpAdminString (SIZE(0..255))
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"A textual description of the server. This value should
include the full name and version identification of the
server."
::= { dhcpv4ServerSystem 1 }
dhcpv4ServerSystemObjectID OBJECT-TYPE
SYNTAX OBJECT IDENTIFIER
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The vendor's authoritative identification of the network
management subsystem contained in this entity. This value is
allocated within the SMI enterprise subtree (1.3.6.1.4.1) and
provides an easy and unambiguous means for determining what
kind of server is being managed. For example, if vendor Ohso
Soft, Inc. is assigned the subtree 1.3.6.1.4.1.4242, it may
assign the identifier 1.3.6.1.4.1.4242.1.1 to its Ursa DHCP
Server."
::= { dhcpv4ServerSystem 2 }
-- bootpCounterObjects Group
bootpCountRequests OBJECT-TYPE
SYNTAX Counter32
MAX-ACCESS read-only
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STATUS current
DESCRIPTION
"The number of packets received that contain a Message Type of
1 (BOOTREQUEST) in the first octet and do not contain option
number 53 (DHCP Message Type) in the options."
REFERENCE
"RFC-2131."
::= { bootpCounters 1 }
bootpCountInvalids OBJECT-TYPE
SYNTAX Counter32
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The number of packets received that do not contain a Message
Type of 1 (BOOTREQUEST) in the first octet or are not valid
BOOTP packets (e.g., too short, invalid field in packet
header)."
::= { bootpCounters 2 }
bootpCountReplies OBJECT-TYPE
SYNTAX Counter32
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The number of packets sent that contain a Message Type of 2
(BOOTREPLY) in the first octet and do not contain option number
53 (DHCP Message Type) in the options."
REFERENCE
"RFC-2131."
::= { bootpCounters 3 }
bootpCountDroppedUnknownClients OBJECT-TYPE
SYNTAX Counter32
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The number of BOOTP packets dropped due to the server not
recognizing or not providing service to the hardware address
received in the incoming packet."
::= { bootpCounters 4 }
bootpCountDroppedNotServingSubnet OBJECT-TYPE
SYNTAX Counter32
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The number of BOOTP packets dropped due to the server not
being configured or not otherwise able to serve addresses on
the subnet from which this message was received."
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::= { bootpCounters 5 }
-- DHCP Counters
dhcpv4RecvdPacketCounters OBJECT-IDENTITY
STATUS current
DESCRIPTION
"Counters for valid received DHCP message packets."
::= { dhcpv4Counters 1 }
dhcpv4SentPacketCounters OBJECT-IDENTITY
STATUS current
DESCRIPTION
"Counters for valid sent DHCP message packets."
::= { dhcpv4Counters 2 }
dhcpv4ErrorPacketCounters OBJECT-IDENTITY
STATUS current
DESCRIPTION
"Counters for DHCP message packets received, but not processed
by the server due to configuration or other errors."
::= { dhcpv4Counters 3 }
-- dhcpv4RecvdPacketCounterObjects Group
dhcpv4CountDiscovers OBJECT-TYPE
SYNTAX Counter32
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The number of DHCPDISCOVER (option 53 with value 1) packets
received."
REFERENCE
"RFC2131; RFC2132, section 9.6."
::= { dhcpv4RecvdPacketCounters 1 }
dhcpv4CountRequests OBJECT-TYPE
SYNTAX Counter32
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The number of DHCPREQUEST (option 53 with value 3) packets
received."
REFERENCE
"RFC2131; RFC2132, section 9.6."
::= { dhcpv4RecvdPacketCounters 2 }
dhcpv4CountReleases OBJECT-TYPE
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SYNTAX Counter32
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The number of DHCPRELEASE (option 53 with value 7) packets
received."
REFERENCE
"RFC2131; RFC2132, section 9.6."
::= { dhcpv4RecvdPacketCounters 3 }
dhcpv4CountDeclines OBJECT-TYPE
SYNTAX Counter32
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The number of DHCPDECLINE (option 53 with value 4) packets
received."
REFERENCE
"RFC2131; RFC2132, section 9.6."
::= { dhcpv4RecvdPacketCounters 4 }
dhcpv4CountInforms OBJECT-TYPE
SYNTAX Counter32
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The number of DHCPINFORM (option 53 with value 8) packets
received."
REFERENCE
"RFC2131; RFC2132, section 9.6."
::= { dhcpv4RecvdPacketCounters 5 }
-- dhcpv4SentPacketCounterObjects Group
dhcpv4CountOffers OBJECT-TYPE
SYNTAX Counter32
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The number of DHCPOFFER (option 53 with value 2) packets
sent."
REFERENCE
"RFC2131; RFC2132, section 9.6."
::= { dhcpv4SentPacketCounters 1 }
dhcpv4CountAcks OBJECT-TYPE
SYNTAX Counter32
MAX-ACCESS read-only
STATUS current
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DESCRIPTION
"The number of DHCPACK (option 53 with value 5) packets sent."
REFERENCE
"RFC2131; RFC2132, section 9.6."
::= { dhcpv4SentPacketCounters 2 }
dhcpv4CountNaks OBJECT-TYPE
SYNTAX Counter32
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The number of DHCPNACK (option 53 with value 6) packets sent."
REFERENCE
"RFC2131; RFC2132, section 9.6."
::= { dhcpv4SentPacketCounters 3 }
dhcpv4CountForcedRenews OBJECT-TYPE
SYNTAX Counter32
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The number of DHCPFORCERENEW (option 53 with value 9) packets
sent."
REFERENCE
" RFC 3203, DHCP reconfigure extension."
::= { dhcpv4SentPacketCounters 4 }
-- dhcpv4ErrorPacketCounterObjects Group
dhcpv4CountInvalids OBJECT-TYPE
SYNTAX Counter32
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The number of DHCP packets received whose DHCP message type
(i.e., option number 53) is not understood or handled by the
server."
::= { dhcpv4ErrorPacketCounters 1 }
dhcpv4CountDroppedUnknownClient OBJECT-TYPE
SYNTAX Counter32
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The number of DHCP packets dropped due to the server not
recognizing or not providing service to the client-id and/or
hardware address received in the incoming packet."
::= { dhcpv4ErrorPacketCounters 2 }
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dhcpv4CountDroppedNotServingSubnet OBJECT-TYPE
SYNTAX Counter32
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The number of DHCP packets dropped due to the server not being
configured or not otherwise able to serve addresses on the
subnet from which this message was received."
::= { dhcpv4ErrorPacketCounters 3 }
-- bootpOptionalStatisticObjects group
bootpStatMinArrivalInterval OBJECT-TYPE
SYNTAX DhcpTimeInterval
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The minimum amount of time between receiving two BOOTP
messages. A message is received at the server when the server
is able to begin processing the message. This typically occurs
immediately after the message is read into server memory. If
no messages have been received, then this object contains a
zero value."
::= { bootpOptionalStatistics 1 }
bootpStatMaxArrivalInterval OBJECT-TYPE
SYNTAX DhcpTimeInterval
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The maximum amount of time between receiving two BOOTP
messages. A message is received at the server when the server
is able to begin processing the message. This typically occurs
immediately after the message is read into server memory. If
no messages have been received, then this object contains a
zero value."
::= { bootpOptionalStatistics 2 }
bootpStatLastArrivalTime OBJECT-TYPE
SYNTAX DateAndTime
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The date and time that the last valid BOOTP message was
received by the server. Invalid messages do not cause this
value to change. If valid no messages have been received, then
this object contains a date and time that is all zero."
::= { bootpOptionalStatistics 3 }
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bootpStatSumSquaresArrivalTime OBJECT-TYPE
SYNTAX Counter64
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The sum of the squared BOOTP packet inter-arrival times in
microseconds. This value may be used to compute the variance
and standard deviation of the BOOTP arrival times. Note that a
microsecond resolution of this object requires a clock
resolution to the millisecond since the square of a millisecond
value produces a value with microsecond resolution."
::= { bootpOptionalStatistics 4 }
bootpStatMinResponseTime OBJECT-TYPE
SYNTAX DhcpTimeInterval
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The smallest time interval measured as the difference between
the arrival of a BOOTP message at the server and the successful
transmission of the response to that message. A message is
received at the server when the server is able to begin
processing the message. A message is transmitted after the
server has no further use for the message. Note that the
operating system may still have the message queued internally.
The operating system queue time is not to be considered as part
of the response time. Invalid messages do not cause this value
to change. If no valid messages have been received, then this
object contains a zero value."
::= { bootpOptionalStatistics 5 }
bootpStatMaxResponseTime OBJECT-TYPE
SYNTAX DhcpTimeInterval
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The largest time interval measured as the difference between
the arrival of a BOOTP message at the server and the successful
transmission of the response to that message. A message is
received at the server when the server is able to begin
processing the message. A message is transmitted after the
server has no further use for the message. Note that the
operating system may still have the message queued internally.
The operating system queue time is not to be considered as part
of the response time. Invalid messages do not cause this value
to change. If no valid messages have been received, then this
object contains a zero value."
::= { bootpOptionalStatistics 6 }
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bootpStatSumResponseTime OBJECT-TYPE
SYNTAX Counter32
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The sum of the response time intervals in milliseconds where a
response time interval is measured as the difference between
the arrival of a BOOTP message at the server and the successful
transmission of the response to that message. A message is
received at the server when the server is able to begin
processing the message. A message is transmitted after the
server has no further use for the message. Note that the
operating system may still have the message queued internally.
The operating system queue time is not to be considered as part
of the response time. Invalid messages do not cause this value
to change. If no valid messages have been received, then this
object contains a zero value."
::= { bootpOptionalStatistics 7 }
bootpStatSumSquaresResponseTime OBJECT-TYPE
SYNTAX Counter64
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The sum of the squared BOOTP packet response times in micro-
seconds. This value may be used to compute the variance and
standard deviation of the BOOTP response times. Note that a
microsecond resolution of this object requires a clock
resolution to the millisecond since the square of a millisecond
value produces a value with microsecond resolution."
::= { bootpOptionalStatistics 8 }
-- dhcpv4OptionalStatisticObjects group
dhcpv4StatMinArrivalInterval OBJECT-TYPE
SYNTAX DhcpTimeInterval
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The minimum amount of time between receiving two DHCPv4
messages. A message is received at the server when the server
is able to begin processing the message. This typically occurs
immediately after the message is read into server memory. If
no messages have been received, then this object contains a
zero value."
::= { dhcpv4OptionalStatistics 1 }
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dhcpv4StatMaxArrivalInterval OBJECT-TYPE
SYNTAX DhcpTimeInterval
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The maximum amount of time between receiving two DHCPv4
messages. A message is received at the server when the server
is able to begin processing the message. This typically occurs
immediately after the message is read into server memory. If
no messages have been received, then this object contains a
zero value."
::= { dhcpv4OptionalStatistics 2 }
dhcpv4StatLastArrivalTime OBJECT-TYPE
SYNTAX DateAndTime
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The date and time that the last valid DHCPv4 message was
received by the server. Invalid messages do not cause this
value to change. If no valid messages have been received, then
this object contains a date and time that is all zero."
::= { dhcpv4OptionalStatistics 3 }
dhcpv4StatSumSquaresArrivalTime OBJECT-TYPE
SYNTAX Counter64
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The sum of the squared DHCPv4 packet inter-arrival times in
microseconds. This value may be used to compute the variance
and standard deviation of the DHCPv4 arrival times. Note that
a microsecond resolution of this object requires a clock
resolution to the millisecond since the square of a millisecond
value produces a value with microsecond resolution."
::= { dhcpv4OptionalStatistics 4 }
dhcpv4StatMinResponseTime OBJECT-TYPE
SYNTAX DhcpTimeInterval
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The smallest time interval measured as the difference between
the arrival of a DHCPv4 message at the server and the
successful transmission of the response to that message. A
message is received at the server when the server is able to
begin processing the message. A message is transmitted after
the server has no further use for the message. Note that the
operating system may still have the message queued internally.
The operating system queue time is not to be considered as part
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of the response time. Invalid messages do not cause this value
to change. If no valid messages have been received, then this
object contains a zero value."
::= { dhcpv4OptionalStatistics 5 }
dhcpv4StatMaxResponseTime OBJECT-TYPE
SYNTAX DhcpTimeInterval
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The largest time interval measured as the difference between
the arrival of a DHCPv4 message at the server and the
successful transmission of the response to that message. A
message is received at the server when the server is able to
begin processing the message. A message is transmitted after
the server has no further use for the message. Note that the
operating system may still have the message queued internally.
The operating system queue time is not to be considered as part
of the response time. Invalid messages do not cause this value
to change. If no valid messages have been received, then this
object contains a zero value."
::= { dhcpv4OptionalStatistics 6 }
dhcpv4StatSumResponseTime OBJECT-TYPE
SYNTAX Counter32
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The sum of the response time intervals in milliseconds where a
response time interval is measured as the difference between
the arrival of a DHCPv4 message at the server and the
successful transmission of the response to that message. A
message is received at the server when the server is able to
begin processing the message. A message is transmitted after
the server has no further use for the message. Note that the
operating system may still have the message queued internally.
The operating system queue time is not to be considered as part
of the response time. Invalid messages do not cause this value
to change. If no valid messages have been received, then this
object contains a zero value."
::= { dhcpv4OptionalStatistics 7 }
dhcpv4StatSumSquaresResponseTime OBJECT-TYPE
SYNTAX Counter64
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The sum of the squared DHCPv4 packet response times in micro-
seconds. This value may be used to compute the variance and
standard deviation of the DHCPv4 response times. Note that a
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microsecond resolution of this object requires a clock
resolution to the millisecond since the square of a millisecond
value produces a value with microsecond resolution."
::= { dhcpv4OptionalStatistics 8 }
-- DHCP Server Configuration
-- dhcpv4ServerSharedNetObjects Group
dhcpv4ServerSharedNetTable OBJECT-TYPE
SYNTAX SEQUENCE OF Dhcpv4ServerSharedNetEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"A list of shared networks that are configured in the server.
A shared network is the logical aggregation of one or more
subnets that share a common network segment (e.g., multi-tapped
coaxial cable, wiring hub, or switch). This table is present
ONLY for those servers that organize the ranges of addresses
available for assignment where a higher-level grouping (i.e.,
the 'shared' network) exists above ranges and subnets."
::= { dhcpv4ServerConfiguration 1 }
dhcpv4ServerSharedNetEntry OBJECT-TYPE
SYNTAX Dhcpv4ServerSharedNetEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"A logical row in the dhcpv4ServerSharedNetTable."
INDEX {
dhcpv4ServerSharedNetName
}
::= { dhcpv4ServerSharedNetTable 1}
Dhcpv4ServerSharedNetEntry ::= SEQUENCE {
dhcpv4ServerSharedNetName SnmpAdminString,
dhcpv4ServerSharedNetFreeAddrLowThreshold Unsigned32,
dhcpv4ServerSharedNetFreeAddrHighThreshold Unsigned32,
dhcpv4ServerSharedNetFreeAddresses Unsigned32,
dhcpv4ServerSharedNetReservedAddresses Unsigned32,
dhcpv4ServerSharedNetTotalAddresses Unsigned32
}
dhcpv4ServerSharedNetName OBJECT-TYPE
SYNTAX SnmpAdminString (SIZE(1..100))
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
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"The name of the shared network, which uniquely identifies an
entry in the dhcpv4ServerSharedNetTable."
::= { dhcpv4ServerSharedNetEntry 1 }
dhcpv4ServerSharedNetFreeAddrLowThreshold OBJECT-TYPE
SYNTAX Unsigned32
MAX-ACCESS accessible-for-notify
STATUS current
DESCRIPTION
"The low threshold for available free addresses in this shared
network. If the value for available free addresses in this
shared network becomes equal to or less than this value, a
dhcpv4ServerFreeAddressLow event is generated for this shared
network. No more dhcpv4ServerFreeAddressLow events will be
generated for this subnet during this execution of the DHCP
server until the value for available free addresses has
exceeded the value of
dhcpv4ServerSharedNetFreeAddrHighThreshold."
::= { dhcpv4ServerSharedNetEntry 2 }
dhcpv4ServerSharedNetFreeAddrHighThreshold OBJECT-TYPE
SYNTAX Unsigned32
MAX-ACCESS accessible-for-notify
STATUS current
DESCRIPTION
"The high threshold for available free addresses in this shared
network. If a dhcpv4ServerFreeAddressLow event was generated
for this subnet, and the value for available free addresses has
exceeded the value of dhcpv4ServerSubnetFreeAddrHighThreshold,
then a dhcpv4ServerFreeAddressHigh event will be generated. No
more dhcpv4ServerFreeAddressHigh events will be generated for
this subnet during this execution of the DHCP server until the
value for available free addresses becomes equal to or less
than the value of dhcpv4ServerSubnetFreeAddrLowThreshold."
::= { dhcpv4ServerSharedNetEntry 3 }
dhcpv4ServerSharedNetFreeAddresses OBJECT-TYPE
SYNTAX Unsigned32
MAX-ACCESS accessible-for-notify
STATUS current
DESCRIPTION
"The number of IP addresses which are available within this
shared network. If the server does not count free addresses by
shared network segment, this value will be zero."
::= { dhcpv4ServerSharedNetEntry 4 }
dhcpv4ServerSharedNetReservedAddresses OBJECT-TYPE
SYNTAX Unsigned32
MAX-ACCESS accessible-for-notify
STATUS current
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DESCRIPTION
"The number of IP addresses which are reserved (not available
for assignment) within this shared network. If the server does
not count reserved addresses by shared network segment, this
value will be zero."
::= { dhcpv4ServerSharedNetEntry 5 }
dhcpv4ServerSharedNetTotalAddresses OBJECT-TYPE
SYNTAX Unsigned32
MAX-ACCESS accessible-for-notify
STATUS current
DESCRIPTION
"The number of IP addresses which are available within this
shared network. If the server does not count total addresses
by shared network segment, this value will be zero."
::= { dhcpv4ServerSharedNetEntry 6 }
-- dhcpv4ServerSubnetObjects Group
dhcpv4ServerSubnetTable OBJECT-TYPE
SYNTAX SEQUENCE OF Dhcpv4ServerSubnetEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"A list of subnets that are configured in this server."
::= { dhcpv4ServerConfiguration 2 }
dhcpv4ServerSubnetEntry OBJECT-TYPE
SYNTAX Dhcpv4ServerSubnetEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"A logical row in the dhcpv4ServerSubnetTable."
INDEX {
dhcpv4ServerSubnetAddress
}
::= { dhcpv4ServerSubnetTable 1 }
Dhcpv4ServerSubnetEntry ::= SEQUENCE {
dhcpv4ServerSubnetAddress InetAddressIPv4,
dhcpv4ServerSubnetMask InetAddressPrefixLength,
dhcpv4ServerSubnetSharedNetworkName SnmpAdminString,
dhcpv4ServerSubnetFreeAddrLowThreshold Unsigned32,
dhcpv4ServerSubnetFreeAddrHighThreshold Unsigned32,
dhcpv4ServerSubnetFreeAddresses Unsigned32
}
dhcpv4ServerSubnetAddress OBJECT-TYPE
SYNTAX InetAddressIPv4
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MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"The IP address of the subnet entry in the
dhcpv4ServerSubnetTable."
::= { dhcpv4ServerSubnetEntry 1 }
dhcpv4ServerSubnetMask OBJECT-TYPE
SYNTAX InetAddressPrefixLength
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The subnet mask of the subnet. This MUST be the same as the
value of DHCP option 1 offered to clients on this subnet."
::= { dhcpv4ServerSubnetEntry 2 }
dhcpv4ServerSubnetSharedNetworkName OBJECT-TYPE
SYNTAX SnmpAdminString (SIZE(1..100))
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The shared subnet name (used as an index into the server
shared subnet table) to which this subnet belongs. This value
will be null for servers that do not organize or describe
networks in this manner."
::= { dhcpv4ServerSubnetEntry 3 }
dhcpv4ServerSubnetFreeAddrLowThreshold OBJECT-TYPE
SYNTAX Unsigned32
MAX-ACCESS accessible-for-notify
STATUS current
DESCRIPTION
"The low threshold for available free addresses in this subnet.
If the value for available free addresses in this subnet
becomes equal to or less than this value, a
dhcpv4ServerSubnetFreeAddrLowThreshold event will be generated
for this shared network. No more
dhcpv4ServerSubnetFreeAddrLowThreshold events will be generated
for this subnet during this execution of the DHCP server until
the value for available free addresses has exceeded the value
of dhcpv4ServerSubnetFreeAddrHighThreshold."
::= { dhcpv4ServerSubnetEntry 4 }
dhcpv4ServerSubnetFreeAddrHighThreshold OBJECT-TYPE
SYNTAX Unsigned32
MAX-ACCESS accessible-for-notify
STATUS current
DESCRIPTION
"The high threshold for available free addresses in this
subnet. If a dhcpv4ServerSubnetFreeAddrLowThreshold event has
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been generated for this subnet, and the value for available
free addresses has exceeded the value of
dhcpv4ServerSubnetFreeAddrHighThreshold, then a
dhcpv4ServerFreeAddressHigh event will be generated. No more
dhcpv4ServerFreeAddressHigh events will be generated for this
subnet during this execution of the DHCP server until the value
for available free addresses becomes equal to or less than the
value of dhcpv4ServerSubnetFreeAddrLowThreshold."
::= { dhcpv4ServerSubnetEntry 5 }
dhcpv4ServerSubnetFreeAddresses OBJECT-TYPE
SYNTAX Unsigned32
MAX-ACCESS accessible-for-notify
STATUS current
DESCRIPTION
"The number of free IP addresses which are available in this
subnet."
::= { dhcpv4ServerSubnetEntry 6 }
-- dhcpv4ServerRangeObjects Group
dhcpv4ServerRangeTable OBJECT-TYPE
SYNTAX SEQUENCE OF ServerRangeEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"A list of ranges that are configured on this server."
::= { dhcpv4ServerConfiguration 3 }
dhcpv4ServerRangeEntry OBJECT-TYPE
SYNTAX ServerRangeEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"A logical row in the dhcpv4ServerRangeTable."
INDEX {
dhcpv4ServerRangeStartAddress,
dhcpv4ServerRangeEndAddress
}
::= { dhcpv4ServerRangeTable 1 }
ServerRangeEntry ::= SEQUENCE {
dhcpv4ServerRangeStartAddress InetAddressIPv4,
dhcpv4ServerRangeEndAddress InetAddressIPv4,
dhcpv4ServerRangeSubnetMask InetAddressPrefixLength,
dhcpv4ServerRangeInUse Gauge32,
dhcpv4ServerRangeOutstandingOffers Gauge32
}
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dhcpv4ServerRangeStartAddress OBJECT-TYPE
SYNTAX InetAddressIPv4
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"The IP address of the first address in the range. The value
of dhcpv4ServerRangeStartAddress must be less than or equal to
the value of dhcpv4ServerRangeEndAddress."
::= { dhcpv4ServerRangeEntry 1 }
dhcpv4ServerRangeEndAddress OBJECT-TYPE
SYNTAX InetAddressIPv4
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"The IP address of the last address in the range. The value of
dhcpv4ServerRangeEndAddress must be greater than or equal to
the value of dhcpv4ServerRangeStartAddress."
::= { dhcpv4ServerRangeEntry 2 }
dhcpv4ServerRangeSubnetMask OBJECT-TYPE
SYNTAX InetAddressPrefixLength
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The subnet address mask for this range."
::= { dhcpv4ServerRangeEntry 3 }
dhcpv4ServerRangeInUse OBJECT-TYPE
SYNTAX Gauge32
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The number of addresses in this range that are currently in
use. This number includes those addresses whose lease has not
expired and addresses which have been reserved (either by the
server or through configuration)."
::= { dhcpv4ServerRangeEntry 4 }
dhcpv4ServerRangeOutstandingOffers OBJECT-TYPE
SYNTAX Gauge32
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The number of outstanding DHCPOFFER messages for this range is
reported with this value. An offer is outstanding if the
server has sent a DHCPOFFER message to a client, but has not
yet received a DHCPREQUEST message from the client nor has the
server-specific timeout (limiting the time in which a client
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can respond to the offer message) for the offer message
expired."
::= { dhcpv4ServerRangeEntry 5 }
-- dhcpv4ServerAddressObjects Group
dhcpv4ServerAddressTable OBJECT-TYPE
SYNTAX SEQUENCE OF Dhcpv4ServerAddressEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"An optional list of addresses that are known by this server.
The list MUST contain addresses that have not expired. The
list MUST NOT contain addresses that have never been assigned
by the server UNLESS the lease is pre-configured in the server
(e.g., a static lease for a host). Expired leases MAY appear
during the time they are 'remembered' by the server for
subsequent assignment to the same host."
::= { dhcpv4ServerConfiguration 4 }
dhcpv4ServerAddressEntry OBJECT-TYPE
SYNTAX Dhcpv4ServerAddressEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"A logical row in the dhcpv4ServerAddressTable."
INDEX {
dhcpv4ServerAddress
}
::= { dhcpv4ServerAddressTable 1 }
Dhcpv4ServerAddressEntry ::= SEQUENCE {
dhcpv4ServerAddress InetAddressIPv4,
dhcpv4ServerAddressSubnetMask InetAddressPrefixLength,
dhcpv4ServerAddressRange InetAddressIPv4,
dhcpv4ServerAddressLeaseType INTEGER,
dhcpv4ServerAddressTimeRemaining Unsigned32,
dhcpv4ServerAddressAllowedProtocol INTEGER,
dhcpv4ServerAddressServedProtocol INTEGER,
dhcpv4ServerAddressPhysicalAddress DhcpPhysicalAddress,
dhcpv4ServerAddressClientId OCTET STRING,
dhcpv4ServerAddressHostName SnmpAdminString,
dhcpv4ServerAddressDomainName SnmpAdminString
}
dhcpv4ServerAddress OBJECT-TYPE
SYNTAX InetAddressIPv4
MAX-ACCESS not-accessible
STATUS current
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DESCRIPTION
"The IP address of this entry in the dhcpv4ServerAddressTable."
::= { dhcpv4ServerAddressEntry 1 }
dhcpv4ServerAddressSubnetMask OBJECT-TYPE
SYNTAX InetAddressPrefixLength
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The subnet mask (DHCP option 1) provided to the client offered
this address. The subnet, resulting from logically ANDing the
subnet mask with the entry's IP address, must be configured on
this server and appear as a row in the dhcpSubnetTable."
::= { dhcpv4ServerAddressEntry 2 }
dhcpv4ServerAddressRange OBJECT-TYPE
SYNTAX InetAddressIPv4
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The starting IP address (dhcpv4ServerRangeStartAddress object)
of the range to which this address belongs. If the address
does not fall into one of the configured ranges (e.g., a
statically configured address on a subnet) the range may be
0.0.0.0."
::= { dhcpv4ServerAddressEntry 3 }
dhcpv4ServerAddressLeaseType OBJECT-TYPE
SYNTAX INTEGER {
static(1),
dynamic(2),
expired(3),
configurationReserved(4),
serverReserved(5)
}
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The type of this address. Types are:
(1) Static addresses defined by the server configuration.
(2) Dynamic addresses defined by the server configuration
AND actually assigned by the server.
(3) Expired dynamic addresses, previously assigned by the
server, and 'remembered' for subsequent assignment to
the same host.
(4) Addresses reserved (i.e., not assignable) by the server
configuration.
(5) Addresses previously assigned by the server, but
temporarily or permanently removed from assignable state
for some reason, e.g., the server received an ICMP
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ECHOREPLY for the IP address or a DHCPDECLINE message
has been received for the IP address."
::= { dhcpv4ServerAddressEntry 4 }
dhcpv4ServerAddressTimeRemaining OBJECT-TYPE
SYNTAX Unsigned32
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The number of seconds until the lease expires. A value of
4294967295 (i.e., 0xFFFFFFFF) should be used for leases that
have a lease time which is 'infinite' and for BOOTP leases."
::= { dhcpv4ServerAddressEntry 5 }
dhcpv4ServerAddressAllowedProtocol OBJECT-TYPE
SYNTAX INTEGER {
none(1),
bootp(2),
dhcp(3),
bootpOrDhcp(4)
}
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The type of protocol that is allowed to be used to serve this
address. A type of none (1) indicates that the address is not
available to be served (e.g., a reserved address). Type (2)
are reserved for BOOTP only devices, while type (3) are
reserved for DHCP only devices. A type of bootp-or-dhcp (4)
may be offered to any type of client."
::= { dhcpv4ServerAddressEntry 6 }
dhcpv4ServerAddressServedProtocol OBJECT-TYPE
SYNTAX INTEGER {
none(1),
bootp(2),
dhcp(3)
}
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The type of protocol that was used when this address was
assigned. This object will have the value of none (1) if the
address has not been served."
::= { dhcpv4ServerAddressEntry 7 }
dhcpv4ServerAddressPhysicalAddress OBJECT-TYPE
SYNTAX DhcpPhysicalAddress
MAX-ACCESS read-only
STATUS current
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DESCRIPTION
"The hardware type and hardware address of the client that has
been assigned this lease. The first octet of this object
contains the hardware type from the 'htype' field of the BOOTP
packet and the remaining octets contain the hardware address
from the 'chaddr' field of the BOOTP packet. This object may
be empty if the address has not been previously served."
::= { dhcpv4ServerAddressEntry 8 }
dhcpv4ServerAddressClientId OBJECT-TYPE
SYNTAX OCTET STRING (SIZE(0..255))
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The client-id of the client that has been assigned this lease.
The client-id is the value specified in option 61 (client-id
option) when the lease was assigned. This object may be empty
if the lease has not been previously assigned or if the client-
id option was not specified when the address was assigned."
::= { dhcpv4ServerAddressEntry 9 }
dhcpv4ServerAddressHostName OBJECT-TYPE
SYNTAX SnmpAdminString (SIZE(1..255))
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The host name (DHCP option 12) the client is configured to
use, or if no host name was configured then the host name that
the client supplied when requesting an address. While this
object has a maximum size of 255 octets, a Fully-Qualified
Domain Name (FQDN) consisting of a Host Name part and a Domain
Name part is currently limited to 255 octets. Therefore, the
sum of the string lengths for this object and the
dhcpv4ServerAddressDomainName must be, in practice, less than
256 octets."
::= { dhcpv4ServerAddressEntry 10 }
dhcpv4ServerAddressDomainName OBJECT-TYPE
SYNTAX SnmpAdminString (SIZE(1..255))
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The domain name (DHCP option 15) assigned to the client.
While this object has a maximum size of 255 octets, a Fully-
Qualified Domain Name (FQDN) consisting of a Host Name part and
a Domain Name part is currently limited to 255 octets, less the
separator ('.') character. Therefore, the sum of the string
lengths for this object and the dhcpv4ServerAddressHostName
must be, in practice, less than 256 octets."
::= { dhcpv4ServerAddressEntry 11 }
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-- dhcpv4ServerClientObjects Group
dhcpv4ServerClientTable OBJECT-TYPE
SYNTAX SEQUENCE OF Dhcpv4ServerClientEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"A list of clients that are known by this server. Details
about the clients may be found by indexing into the
dhcpv4ServerAddressTable using the
dhcpv4ServerClientHardwareAddress, and
dhcpv4ServerClientAddress objects. This table is indexed first
by the MAC address of the client and then by the subnet address
on which the client resides. The subnet is included as an
index since a MAC address is only guaranteed to be unique
within a subnet (i.e., a MAC address is not globally unique)."
::= { dhcpv4ServerConfiguration 5 }
dhcpv4ServerClientEntry OBJECT-TYPE
SYNTAX Dhcpv4ServerClientEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"A logical row in the dhcpv4ServerClientTable. An entry in
this table may be a client that requested an address, but was
refused (e.g., not authorized.) Servers MAY track these types
of clients if desired and may choose to remove such client
entries using a server-defined algorithm. As an example, a
server may choose to keep client request that does not map to
an address for a one hour time period before removing that
entry from this table."
INDEX {
dhcpv4ServerClientHardwareAddress,
dhcpv4ServerClientAddress
}
::= { dhcpv4ServerClientTable 1 }
Dhcpv4ServerClientEntry ::= SEQUENCE {
dhcpv4ServerClientHardwareAddress DhcpPhysicalAddress,
dhcpv4ServerClientAddress InetAddressIPv4,
dhcpv4ServerClientSubnetMask InetAddressPrefixLength,
dhcpv4ServerClientLastRequestTime DhcpTimeInterval,
dhcpv4ServerClientLastRequestType INTEGER,
dhcpv4ServerClientLastResponseType INTEGER
}
dhcpv4ServerClientHardwareAddress OBJECT-TYPE
SYNTAX DhcpPhysicalAddress
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MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"The hardware type and hardware address of the client that has
been assigned this lease."
::= { dhcpv4ServerClientEntry 1 }
dhcpv4ServerClientAddress OBJECT-TYPE
SYNTAX InetAddressIPv4
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"The IP address of the entry, used to index into the
dhcpv4ServerAddressTable. May be 0.0.0.0 if an address is not
associated with this client."
::= { dhcpv4ServerClientEntry 2 }
dhcpv4ServerClientSubnetMask OBJECT-TYPE
SYNTAX InetAddressPrefixLength
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The subnet mask (DHCP option 1) applied to
dhcpv4ServerClientAddress."
::= { dhcpv4ServerClientEntry 3 }
dhcpv4ServerClientLastRequestTime OBJECT-TYPE
SYNTAX DhcpTimeInterval
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The timestamp of the last request received, to millisecond
precision if available on the server."
::= { dhcpv4ServerClientEntry 4 }
dhcpv4ServerClientLastRequestType OBJECT-TYPE
SYNTAX INTEGER {
bootprequest(0),
dhcpdiscover(1),
dhcprequest(3),
dhcpdecline(4),
dhcprelease(7),
dhcpinform(8)
}
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The type of the last request message received for this client.
If the server does not capture this information, the value
32,767 is returned."
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REFERENCE
"RFC2131; RFC2132, section 9.6; draft-ietf-dhc-leasequery-
04.txt."
::= { dhcpv4ServerClientEntry 5 }
dhcpv4ServerClientLastResponseType OBJECT-TYPE
SYNTAX INTEGER {
bootpreply(1),
dhcpoffer(2),
dhcpack(5),
dhcpnak(6),
dhcpforcerenew(9)
}
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The type of the last response message sent to this client. If
the server does not capture this information, the value 32,767
is returned."
REFERENCE
"RFC2131; RFC2132, section 9.6; draft-ietf-dhc-leasequery-
04.txt"
::= { dhcpv4ServerClientEntry 6 }
-- dhcpv4ServerNotifyObjects Group
dhcpv4ServerNotifyDuplicateIpAddr OBJECT-TYPE
SYNTAX InetAddressIPv4
MAX-ACCESS accessible-for-notify
STATUS current
DESCRIPTION
"The IP address found to be a duplicate. Duplicates are
detected by servers, which issue an ICMP ECHOREQUEST prior to
offering an IP address lease, or by a client issuing a
gratuitous ARP message and reported through a DHCPDECLINE
message."
::= { dhcpv4ServerNotifyObjects 1 }
dhcpv4ServerNotifyDuplicateMac OBJECT-TYPE
SYNTAX DhcpPhysicalAddress
MAX-ACCESS accessible-for-notify
STATUS current
DESCRIPTION
"The offending MAC address which caused a duplicate IP address
to be detected, if captured by the server, else 00-00-00-00-00-
00."
::= { dhcpv4ServerNotifyObjects 2 }
dhcpv4ServerNotifyClientOrServerDetected OBJECT-TYPE
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SYNTAX INTEGER {
client(1),
server(2)
}
MAX-ACCESS accessible-for-notify
STATUS current
DESCRIPTION
"Duplicate IP addresses may be detected either by a server,
using an ICMP ECHO message, or by a client using ARP. This
object is set by the server to (1) if the client used
DHCPDECLINE to mark the offered address as in-use, or to (2) if
the server discovered the address in use by some client before
offering it."
::= { dhcpv4ServerNotifyObjects 3 }
dhcpv4ServerNotifyServerStart OBJECT-TYPE
SYNTAX DateAndTime
MAX-ACCESS accessible-for-notify
STATUS current
DESCRIPTION
"The date and time when the server began operation."
::= { dhcpv4ServerNotifyObjects 4 }
dhcpv4ServerNotifyServerStop OBJECT-TYPE
SYNTAX DateAndTime
MAX-ACCESS accessible-for-notify
STATUS current
DESCRIPTION
"The date and time when the server ceased operation."
::= { dhcpv4ServerNotifyObjects 5 }
-- Notifications
dhcpv4ServerNotificationPrefix OBJECT IDENTIFIER
::= { dhcpv4Server 2 }
dhcpv4ServerNotifications OBJECT IDENTIFIER
::= { dhcpv4ServerNotificationPrefix 0 }
dhcpv4ServerFreeAddressLow NOTIFICATION-TYPE
OBJECTS {
dhcpv4ServerSharedNetFreeAddrLowThreshold,
dhcpv4ServerSharedNetFreeAddresses
}
STATUS current
DESCRIPTION
"This notification signifies that the number of available IP
addresses for a particular shared network has fallen below the
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value of dhcpv4ServerSharedNetFreeAddrLowThreshold for that
shared network."
::= { dhcpv4ServerNotifications 1 }
dhcpv4ServerFreeAddressHigh NOTIFICATION-TYPE
OBJECTS {
dhcpv4ServerSharedNetFreeAddrHighThreshold,
dhcpv4ServerSharedNetFreeAddresses
}
STATUS current
DESCRIPTION
"This notification signifies that the number of available IP
addresses for a particular shared network has risen above the
value of dhcpv4ServerSharedNetFreeAddrHighThreshold for that
shared network."
::= { dhcpv4ServerNotifications 2 }
dhcpv4ServerStartTime NOTIFICATION-TYPE
OBJECTS { dhcpv4ServerNotifyServerStart }
STATUS current
DESCRIPTION
"This notification signifies that the server of the specified
type has started on the host from which this notification has
been sent."
::= { dhcpv4ServerNotifications 3 }
dhcpv4ServerStopTime NOTIFICATION-TYPE
OBJECTS { dhcpv4ServerNotifyServerStop }
STATUS current
DESCRIPTION
"This notification signifies that the server of the specified
type has stopped normally on the host from which this
notification has been sent."
::= { dhcpv4ServerNotifications 4 }
dhcpv4ServerDuplicateAddress NOTIFICATION-TYPE
OBJECTS {
dhcpv4ServerNotifyDuplicateIpAddr,
dhcpv4ServerNotifyDuplicateMac,
dhcpv4ServerNotifyClientOrServerDetected
}
STATUS current
DESCRIPTION
"This notification signifies that a duplicate IP address has
been detected. The DHCP server can detect this condition
through the ping-before-offer mechanism. Alternatively, the
client may have sent a DHCPDECLINE back to the server; this is
assumed to be the result of the client detecting that the
address was in use. In either case, the DHCP server marks the
IP address as unavailable for leasing to clients. The
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dhcpv4ServerNotifyClientOrServerDetected object indicates
whether the client or server detected this condition."
::= { dhcpv4ServerNotifications 5 }
-- Conformance
dhcpv4ServerConformance OBJECT-IDENTITY
STATUS current
DESCRIPTION
"DHCP server conformance objects are all defined in this
branch."
::= { dhcpv4Server 3 }
dhcpv4ServerCompliances OBJECT IDENTIFIER
::= { dhcpv4ServerConformance 1 }
dhcpv4ServerGroups OBJECT IDENTIFIER
::= { dhcpv4ServerConformance 2 }
-- Compliance groups
dhcpv4ServerCompliance MODULE-COMPLIANCE
STATUS current
DESCRIPTION
"This group describes the requirements for conformance to the
DHCP Server MIB. A DHCPv4 server implementation is only
required to support IPv4 addresses. In particular, this
comment applies to the following objects with MAX-ACCESS not-
accessible:
dhcpv4ServerSubnet
dhcpv4ServerRangeStart
dhcpv4ServerRangeEnd
dhcpv4ServerAddress
dhcpv4ServerClientAddress."
MODULE -- this module
MANDATORY-GROUPS {
dhcpv4ServerSystemObjects,
bootpCounterObjects,
dhcpv4RecvdPacketCounterObjects,
dhcpv4SentPacketCounterObjects,
dhcpv4ErrorPacketCounterObjects,
dhcpv4ServerSharedNetObjects,
dhcpv4ServerSubnetObjects,
dhcpv4ServerRangeObjects,
dhcpv4ServerAddressObjects,
dhcpv4ServerClientObjects,
dhcpv4ServerNotifyObjectsGroup,
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dhcpv4ServerNotificationsGroup
}
GROUP bootpOptionalStatisticObjects
DESCRIPTION
"Mandatory only for servers that capture the optional BOOTP
statistics."
GROUP dhcpv4OptionalStatisticObjects
DESCRIPTION
"Mandatory only for servers that capture the optional DHCPv4
statistics."
::= { dhcpv4ServerCompliances 1 }
-- Object groups
dhcpv4ServerSystemObjects OBJECT-GROUP
OBJECTS {
dhcpv4ServerSystemDescr,
dhcpv4ServerSystemObjectID
}
STATUS current
DESCRIPTION
"Objects belonging to the dhcpv4ServerSystemObjects group."
::= { dhcpv4ServerGroups 1 }
bootpCounterObjects OBJECT-GROUP
OBJECTS {
bootpCountRequests,
bootpCountInvalids,
bootpCountReplies,
bootpCountDroppedUnknownClients,
bootpCountDroppedNotServingSubnet
}
STATUS current
DESCRIPTION
"Objects belonging to the bootpBounterObjects group."
::= { dhcpv4ServerGroups 2 }
dhcpv4RecvdPacketCounterObjects OBJECT-GROUP
OBJECTS {
dhcpv4CountDiscovers,
dhcpv4CountRequests,
dhcpv4CountReleases,
dhcpv4CountDeclines,
dhcpv4CountInforms
}
STATUS current
DESCRIPTION
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"Objects belonging to the dhcpv4RecvdPacketCounterObjects
group."
::= { dhcpv4ServerGroups 3 }
dhcpv4SentPacketCounterObjects OBJECT-GROUP
OBJECTS {
dhcpv4CountOffers,
dhcpv4CountAcks,
dhcpv4CountNaks,
dhcpv4CountForcedRenews
}
STATUS current
DESCRIPTION
"Objects belonging to the dhcpv4SentPacketCounterObjects
group."
::= { dhcpv4ServerGroups 4 }
dhcpv4ErrorPacketCounterObjects OBJECT-GROUP
OBJECTS {
dhcpv4CountInvalids,
dhcpv4CountDroppedUnknownClient,
dhcpv4CountDroppedNotServingSubnet
}
STATUS current
DESCRIPTION
"Objects belonging to the dhcpv4ErrorPacketCounterObjects
group."
::= { dhcpv4ServerGroups 5 }
bootpOptionalStatisticObjects OBJECT-GROUP
OBJECTS {
bootpStatMinArrivalInterval,
bootpStatMaxArrivalInterval,
bootpStatLastArrivalTime,
bootpStatSumSquaresArrivalTime,
bootpStatMinResponseTime,
bootpStatMaxResponseTime,
bootpStatSumResponseTime,
bootpStatSumSquaresResponseTime
}
STATUS current
DESCRIPTION
"Objects belonging to the bootpOptionalStatisticObjects group."
::= { dhcpv4ServerGroups 6 }
dhcpv4OptionalStatisticObjects OBJECT-GROUP
OBJECTS {
dhcpv4StatMinArrivalInterval,
dhcpv4StatMaxArrivalInterval,
dhcpv4StatLastArrivalTime,
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dhcpv4StatSumSquaresArrivalTime,
dhcpv4StatMinResponseTime,
dhcpv4StatMaxResponseTime,
dhcpv4StatSumResponseTime,
dhcpv4StatSumSquaresResponseTime
}
STATUS current
DESCRIPTION
"Objects belonging to the dhcpv4OptionalStatisticObjects
group."
::= { dhcpv4ServerGroups 7 }
dhcpv4ServerSharedNetObjects OBJECT-GROUP
OBJECTS {
dhcpv4ServerSharedNetFreeAddrLowThreshold,
dhcpv4ServerSharedNetFreeAddrHighThreshold,
dhcpv4ServerSharedNetFreeAddresses,
dhcpv4ServerSharedNetReservedAddresses,
dhcpv4ServerSharedNetTotalAddresses
}
STATUS current
DESCRIPTION
"Objects belonging to the dhcpv4ServerSharedNetObjects group."
::= { dhcpv4ServerGroups 8 }
dhcpv4ServerSubnetObjects OBJECT-GROUP
OBJECTS {
dhcpv4ServerSubnetMask,
dhcpv4ServerSubnetSharedNetworkName,
dhcpv4ServerSubnetFreeAddrLowThreshold,
dhcpv4ServerSubnetFreeAddrHighThreshold,
dhcpv4ServerSubnetFreeAddresses
}
STATUS current
DESCRIPTION
"Objects belonging to the dhcpv4ServerSubnetObjects group."
::= { dhcpv4ServerGroups 9 }
dhcpv4ServerRangeObjects OBJECT-GROUP
OBJECTS {
dhcpv4ServerRangeSubnetMask,
dhcpv4ServerRangeInUse,
dhcpv4ServerRangeOutstandingOffers
}
STATUS current
DESCRIPTION
"Objects belonging to the dhcpv4ServerRangeObjects group."
::= { dhcpv4ServerGroups 10 }
dhcpv4ServerAddressObjects OBJECT-GROUP
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OBJECTS {
dhcpv4ServerAddressSubnetMask,
dhcpv4ServerAddressRange,
dhcpv4ServerAddressLeaseType,
dhcpv4ServerAddressTimeRemaining,
dhcpv4ServerAddressAllowedProtocol,
dhcpv4ServerAddressServedProtocol,
dhcpv4ServerAddressPhysicalAddress,
dhcpv4ServerAddressClientId,
dhcpv4ServerAddressHostName,
dhcpv4ServerAddressDomainName
}
STATUS current
DESCRIPTION
"Objects belonging to the dhcpv4ServerAddressObjects group."
::= { dhcpv4ServerGroups 11 }
dhcpv4ServerClientObjects OBJECT-GROUP
OBJECTS {
dhcpv4ServerClientSubnetMask,
dhcpv4ServerClientLastRequestTime,
dhcpv4ServerClientLastRequestType,
dhcpv4ServerClientLastResponseType
}
STATUS current
DESCRIPTION
"Objects belonging to the dhcpv4ServerClientObjects group."
::= { dhcpv4ServerGroups 12 }
dhcpv4ServerNotifyObjectsGroup OBJECT-GROUP
OBJECTS {
dhcpv4ServerNotifyDuplicateIpAddr,
dhcpv4ServerNotifyDuplicateMac,
dhcpv4ServerNotifyClientOrServerDetected,
dhcpv4ServerNotifyServerStart,
dhcpv4ServerNotifyServerStop
}
STATUS current
DESCRIPTION
"Objects belonging to the dhcpv4ServerNotifyObjects group."
::= { dhcpv4ServerGroups 13 }
dhcpv4ServerNotificationsGroup NOTIFICATION-GROUP
NOTIFICATIONS {
dhcpv4ServerFreeAddressLow,
dhcpv4ServerFreeAddressHigh,
dhcpv4ServerStartTime,
dhcpv4ServerStopTime,
dhcpv4ServerDuplicateAddress
}
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STATUS current
DESCRIPTION
"Notifications belonging to the dhcpv4ServerNotifications
group."
::= { dhcpv4ServerGroups 14 }
END
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5. Intellectual Property
The IETF takes no position regarding the validity or scope of any
intellectual property or other rights that might be claimed to
pertain to the implementation or use of the technology described in
this document or the extent to which any license under such rights
might or might not be available; neither does it represent that it
has made any effort to identify any such rights. Information on the
IETF's procedures with respect to rights in standards-track and
standards-related documentation can be found in BCP-11.
Copies of claims of rights made available for publication and any
assurances of licenses to be made available, or the result of an
attempt made to obtain a general license or permission for the use of
such proprietary rights by implementers or users of this
specification can be obtained from the IETF Secretariat.
The IETF invites any interested party to bring to its attention any
copyrights, patents or patent applications, or other proprietary
rights that may cover technology that may be required to practice
this standard. Please address the information to the IETF Executive
Director.
6. Acknowledgements
This document is the result of work undertaken the by DHCP working
group. The editors would like to particularly acknowledge the
development team from Carnegie-Mellon University whose work creating
a private MIB for their DHCP server inspired the development of this
proposal. In particular, many thanks to Ryan Troll who provided a
great deal of useful feedback during the initial development of this
MIB.
Thanks to Nathan Lane, Kim Kinnear, Yannick Koehler, Rick Geesen, Jin
Tao, James Brister, Alan Hackert, Patrick Cosmo, Taeko Saito, and
Devrapratap Baul for their review, comments, and contributions.
Special thanks to Rich Woundy for his excellent suggestions that
contributed to the --08 draft: any lingering errors are to be blamed
solely on the editors.
7. IANA Considerations
IANA must fill in the value of the RFC number when it is assigned to
this memo. It is represented as "xxxx" in the DESCRIPTION section of
MODULE-IDENTITY.
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One specific value for a MIB object requires completion before this
memo can advance to RFC status. It is:
o OID value for "dhcp" รป see MODULE-IDENTITY
8. Security Considerations
There are no management objects defined in this MIB that have a MAX-
ACCESS clause of read-write or read-create. Such objects may be
considered sensitive or vulnerable in some environments. The support
for SET operations in a non-secure environment without proper
protection can have a negative effect on network operations.
Therefore, if this MIB is implemented correctly, there is no risk
that an intruder can alter or create any management objects of this
MIB via direct SNMP SET operations.
Some of the readable objects in this MIB module (i.e., objects with a
MAX-ACCESS other than not-accessible) may be considered sensitive or
vulnerable in some network environments. It is thus important to
control even GET and/or NOTIFY access to these objects and possibly
to even encrypt the values of these objects when sending them over
the network via SNMP. These are the tables and objects and their
sensitivity/vulnerability:
o dhcpv4ServerRangeTable
o dhcpv4ServerAddressTable
These two objects, in conjunction, provide an observer with a current
view of the available and assigned addresses allocated by this
server. Such knowledge can be used to manually configure a host
computer with a valid IP address for the network managed by the DHCP
server. This could be part of either a Theft of Service scheme or a
Denial of Service attack wherein rogue (pseudo-)hosts simply claim
and defend IP addresses either to subvert accounting for their use or
to disrupt the network for legitimate hosts.
It is thus important to control even GET access to these objects and
possibly to even encrypt the values of these objects when sending
them over the network via SNMP. Not all versions of SNMP provide
features for such a secure environment.
SNMP versions prior to SNMPv3 did not include adequate security.
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.
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It is recommended that the implementers consider the security
features as provided by the SNMPv3 framework (see [RFC3410], section
8), including full support for the SNMPv3 cryptographic mechanisms
(for authentication and privacy).
Further, deployment of SNMP versions prior to SNMPv3 is NOT
RECOMMENDED. Instead, it is RECOMMENDED to deploy SNMPv3 and to
enable cryptographic security. It is then a customer/operator
responsibility to ensure that the SNMP entity giving access to an
instance of this MIB module 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.
Denial of Service attacks on a DHCP server are conceivable by
flooding the SNMP (sub-)agent with requests, tying up host system and
server resources processing SNMP messages. The authors know of no
way to wholly prevent such attacks, but have attempted to construct
relatively simple tables to minimize the work required to respond to
messages.
9. References
One normative reference is currently an Internet-Draft, nearly ready
for Working Group Last Call. This reference MUST be updated when the
draft advances to RFC status.
9.1. Normative References
[RFC2131] Droms, R., "Dynamic Host Configuration Protocol," RFC 2131,
March 1997.
[RFC2132] Alexander, S. and Droms, R., "DHCP Options and BOOTP Vendor
Extensions," RFC 2132, March 1997.
[RFC2578] Case, J., McCloghrie, K., Perkins, D., Rose, M.,
Schoenwaelder, J., and S. Waldbusser, "Structure of Management
Information for Version 2 of the Simple Network Management Protocol
(SNMPv2)," RFC 2578, April 1999.
[RFC2579] Case, J., McCloghrie, K., Rose, M., Schoenwaelder, J., and
S. Waldbusser, "Textual Conventions for Version 2 of the Simple
Network Management Protocol (SNMPv2)," RFC 2579, April 1999.
[RFC2580] Case, J., McCloghrie, K., Rose, M., Schoenwaelder, J., and
S. Waldbusser, "Conformance Statements for Version 2 of the Simple
Network Management Protocol (SNMPv2)," RFC 2580, April 1999.
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[RFC3203], Yves T'Joens and Christian Hublet, Peter De Schrijver,
"The DHCP Reconfigure Extension," July 2001
<draft-ietf-dhc-leasequery-04.txt> Rich Woundy and Kim Kinnear, "DHCP
Lease Query," November 2003.
9.2. Informative References
[DEN] Directory Enabled Networks Working Group,
http://www.universe.digex.net/~murchiso/den.
[RFC1123] R. Braden, "Requirements for Internet Hosts -- Application
and Support," RFC 1123, October 1989.
[RFC3410] Case, J., Mundy, R., Partain, D. and B. Stewart,
"Introduction and Applicability Statements for Internet-Standard
Management Framework", RFC 3410, December 2002.
10. Editors' Addresses
Richard Barr Hibbs
952 Sanchez Street
San Francisco, California 94114-3362
USA
Phone: +1-(415)-648-3920
Fax: +1-(415)-648-9017
Email: rbhibbs@pacbell.net
Glenn Waters
Nortel Networks
310-875 Carling Avenue,
Ottawa, Ontario K1S 5P1
Canada
Phone: +1-(613)-798-4925
Email: gww@NortelNetworks.com
11. Full Copyright Statement
Copyright (C), 2003, The Internet Society. All Rights Reserved.
This document and translations of it may be copied and furnished to
others, and derivative works that comment on or otherwise explain it
or assist in its implementation may be prepared, copied, published
and distributed, in whole or in part, without restriction of any
kind, provided that the above copyright notice and this paragraph are
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Internet Draft DHCP Server MIB October 2003
included on all such copies and derivative works. However, this
document itself may not be modified in any way, such as by removing
the copyright notice or references to the Internet Society or other
Internet organizations, except as needed for the purpose of
developing Internet standards in which case the procedures for
copyrights defined in the Internet Standards process must be
followed, or as required to translate it into languages other than
English.
The limited permissions granted above are perpetual and will not be
revoked by the Internet Society or its successors or assigns.
This document and the information contained herein is provided on an
"AS IS" basis and THE INTERNET SOCIETY AND THE INTERNET ENGINEERING
TASK FORCE DISCLAIMS ALL WARRANTIES, EXPRESS OR IMPLIED, INCLUDING
BUT NOT LIMITED TO ANY WARRANTY THAT THE USE OF THE INFORMATION
HEREIN WILL NOT INFRINGE ANY RIGHTS OR ANY IMPLIED WARRANTIES OF
MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE.
Acknowledgement
Funding for the RFC Editor function is currently provided by the
Internet Society.
Hibbs & Waters Expires: Oct 2003 + 6 months [Page 47]
