Internet Draft David Zelig
Expires: February 2003 Corrigent Systems
Thomas D. Nadeau
Cisco Systems, Inc.
August 2002
Ethernet Pseudo Wire (PW) Management Information Base
draft-zelig-pw-enet-mib-01.txt
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-
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Internet-Drafts are draft documents valid for a maximum of six
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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
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Copyright (C) The Internet Society (2001). All rights reserved.
1 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 describes managed objects
for modeling of Ethernet Pseudo Wire (PW) services.
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Table of Contents
1 Abstract.......................................................1
2 Introduction...................................................2
3 Terminology....................................................3
4 The SNMP Management Framework..................................3
4.1 Object Definitions...........................................4
5 Feature Checklist..............................................4
6 PW-MIB usage...................................................4
6.1 PW-ENET-MIB usage............................................5
6.2 PW-ENET management model.....................................6
6.3 Example of MIB usage.........................................7
7 Object definitions.............................................7
8 Security Considerations.......................................17
9 References....................................................18
10 Author's Addresses..........................................20
11 Full Copyright Statement....................................20
2 Introduction
This document describes a model for managing Ethernet pseudo wire
services for transmission over a packet Switched Network (PSN). This
MIB module is generic and common to all types of PSNs supported in
the PWE3 Framework [FRMWK], which describes the transport and
encapsulation of L1 and L2 services over supported PSN types.
In particular, the MIB module associates a whole port or specific
VLANs on top of a physical Ethernet port or a virtual Ethernet
interface (for VPLS service) to a point-to-point VC. It is
complementary to the [PWMIB], which is used to manage the generic PW
parameters common to all service, including all supported PSN types.
Conventions used in this document
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 RFC-2119
[BCP14].
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3 Terminology
This document uses terminology from the document describing the PW
framework [FRMWK] and from [PW-ENET].
4 The SNMP Management Framework
The SNMP Management Framework presently consists of five major
components:
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
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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.
4.1 Object Definitions
Managed objects are accessed via a virtual information store, termed
the Management Information Base or MIB. Objects in the MIB are
defined using the subset of Abstract Syntax Notation One (ASN.1)
defined in the SMI. In particular, an OBJECT IDENTIFIER, an
administratively assigned name, names each object type. The object
type together with an object instance serves to uniquely identify a
specific instantiation of the object. For human convenience, we
often use a textual string, termed the descriptor, to also refer to
the object type.
5 Feature Checklist
The PW Ethernet MIB (PW-ENET-MIB) is designed to satisfy the
following requirements and constraints:
- The MIB is designed to be work with the PW-MIB [PW-MIB].
- The MIB is independent of the PSN type.
- The MIB supports various options for selecting Ethernet packets
into the PW. These include port-based PW, VLAN-based PW, VLAN
range PW, VLAN-change and adding or removing VLAN fields between
the port to be emulated and the VC.
- In the case of an MPLS PSN, the MIB support the use of multiple
VCs to carry the same Ethernet service. These VCs can be used to
support L-LSPs or single COS E-LSPs capable PSN, when mapping of
the Ethernet PRI bits to the PSN COS is required.
- The MIB enables both point-to-point Ethernet services and VPLS
services such as VPLS [VPLS].
- The MIB allow modeling of the PW as an Ethernet virtual port to
be managed via existing Ethernet MIBs like Etherlike-MIB
[ENETLIKE].
6 PW-MIB usage
The MIB structure for defining a PW service is composed of three
layers of MIB modules functioning together. This general model is
defined in the PWE3 Framework [FRMWK]. The layering model is
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intended to sufficiently isolate PW services from the underlying PSN
layer that carries the emulated service. This is done at the same
time as providing a standard means for connecting any supported
services to any supported PSNs.
The first layer known as the service layer contains service-specific
modules such as the one defined in this document. These modules
define service-specific management objects that interface or
collaborate with existing MIB modules for the native version of the
service. The service-specific module glues÷ the standard module to
the PWE MIB framework.
The next layer of the PWE MIB framework is comprised of the PW-MIB
module [PWMIB]. This module is used to configure general parameters
of PW VCs that are common to all types of emulated services and
PSNs. This layer is connected to the service-specific layer above,
and the PSN layer below.
The PSN layer provides PSN-specific modules for each type of PSN.
These modules associate the VC with one or more "tunnels" that carry
the service over the PSN. These modules are defined in other
documents. This module is used to glue÷ the PW service to the
underlying PSN-specific MIB modules. In the case of MPLS, for
example, the PW-MPLS MIB [PWMPLSMIB] is used to connect the PW
service to either the MPLS-LDP [LDPMIB] or MPLS-TE [TEMIB] MIBs.
[PWTC] defines some of the object types used in these modules.
The Etherlike-MIB [ENETLIKE] does not support virtual Ethernet port,
however it is sometimes desired to manage the PW VC as an Ethernet
port via the Etherlike-MIB. The MIB support an option to recognize
the VC as an ifIndex, enabling standard use of the Etherlike-MIB to
manage the VC.
6.1 PW-ENET-MIB usage
- The VC table (pwVcTable) is used for all VC types (ATM, FR,
Ethernet, SONET, etc.). This table contains high level generic
parameters related to the VC creation. A row is created by the
operator for each PW service.
- Based on the PSN type defined for the VC, rows are created in PSN
specific module (for example [PWMPLSMIB]) and associated to the
VC table by a common VC index.
- If the VC type is Ethernet, EthernetVLAN or EthernetVPLS a row is
created in pwVcEnetTable.
- When using a MPLS PSN, it may be required to separate the same
Ethernet services to multiple PW in order to support multiple COS
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on the same service. In this case, multiple VCs, each with the
appropriate COS will be created to the same destination, and
classification will be based also on the Ethernet PRI bits
marking. The MIB allow any combinations of multiple PRI setting
to PSN COS mapping (The exact PSN marking (EXP bits, DSCP etc.)
is out of scope of this MIB). In these cases, pwVcEnetTable will
hold multiple rows with the same Ethernet port and VLAN mapping,
each VC will need to be created separately by the signaling
process.
6.2 PW-ENET management model
The management model for the Ethernet PW VC is shown in figure 1,
and is based on the PW proposed layering [PWLAYRES].
+--------------------------------------+
| PE Device |
+--------------------------------------+
Single | | |
PWES | | Single | PW Instance
<------>o Forwarder + PW IWF X<=========>
| | Instance |
+--------------------------------------+
^
|
May be modeled as
ifIndex
Notation:
o A physical CE-bound PE port
+ A PW IWF instance interface to the forwarder.
X A PE PSN-bound port.
Figure 1: A simple point-to-point service
In the typical point-to-point service, the object
pwVcEnetPortIfIndex associate the physical CE-bound PE port ('o') to
the PW (it is allowed to have multiple PWs associated to the same
physical port). The operations of the forwarder are also managed by
this MIB.
In some models it is convenient to model the forwarder virtual
interface to a PW IWF instance ('O') as an ifIndex - The object
pwVcEnetIfIndex indicate this relation in this case, and the PW
instance is managed as virtual Ethernet interface in the PE.
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The model for using the VC in non-point to point applications, such
as VPLS are done with the same principle in mind, but the details
are yet FFS.
6.3 Example of MIB usage
TBD
7 Object definitions
--
-- Ethernet PW MIB
--
PW-ENET-MIB DEFINITIONS ::= BEGIN
IMPORTS
OBJECT-TYPE, MODULE-IDENTITY, experimental,
Counter64
FROM SNMPv2-SMI
MODULE-COMPLIANCE, OBJECT-GROUP
FROM SNMPv2-CONF
StorageType, RowStatus
FROM SNMPv2-TC
InterfaceIndexOrZero
FROM IF-MIB
pwVcIndex
FROM PW-MIB
PwVcVlanCfg
FROM PW-TC-MIB;
pwVcEnetMIB MODULE-IDENTITY
LAST-UPDATED "200208201200Z" -- 20 August 2002 12:00:00 GMT
ORGANIZATION
"IETF PWE3 Working group"
CONTACT-INFO
"David Zelig
Postal: Corrigent Systems
126, Yigal Alon St.
Tel Aviv, ISRAEL
Phone: +972-3-6945273
E-mail: davidz@corrigent.com
Thomas D. Nadeau
Postal: Cisco Systems, Inc.
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250 Apollo Drive
Chelmsford, MA 01824
Tel: +1-978-497-3051
Email: tnadeau@cisco.com
"
DESCRIPTION
"This MIB describes a model for managing Ethernet
point-to-point pseudo wire services over a Packet
Switched Network (PSN)."
-- Revision history.
REVISION
"200208201200Z" -- 20 August 2002 12:00:00 GMT
DESCRIPTION
"Changes from previous version:
1) Add pwVcEnetVcIfIndex - Option for VC as ifIndex.
2) Change counters to 64 bits.
3) Add mode for adding/removing VLAN fields between PW and
CE bound interface.
4) Referencing draft-martini instead of draft-so.
5) Editorial changes for some description clauses.
6) MPLS PRI mapping table to be independent (not augmented).
7) Adapt descriptions and rules of use to
dratf-ietf-pw3ei-Ethernet-encap-00.
"
REVISION
"200202031200Z" -- 03 February 2002 12:00:00 GMT
DESCRIPTION
"initial revision as -00 draft"
::= { experimental xxx } -- TBD: Get number from IANA
pwVcEnetNotifications OBJECT IDENTIFIER ::= { pwVcEnetMIB 0 }
pwVcEnetObjects OBJECT IDENTIFIER ::= { pwVcEnetMIB 1 }
pwVcEnetConformance OBJECT IDENTIFIER ::= { pwVcEnetMIB 2 }
--
-- VC Ethernet table
--
pwVcEnetTable OBJECT-TYPE
SYNTAX SEQUENCE OF PwVcEnetEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"This table contains the index to the Ethernet tables
associated with this ETH VC, the VLAN configuration and
VLAN mode."
::= { pwVcEnetObjects 1 }
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pwVcEnetEntry OBJECT-TYPE
SYNTAX PwVcEnetEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"This table is indexed by the same index that was created
for the associated entry in the PW VC Table in the PW-MIB.
The PwVcIndex and the pwVcEnetPwVlan are used as indexes
to allow multiple VLANs to exist on the same PW.
An entry is created in this table by the agent for every
entry in the pwVc table with a VcType of 'ethernetVLAN',
'ethernet' or 'ethernetVPLS'. Additional rows may be
created by the operator or the agent if multiple entries
are required for the same VC.
This table provides Ethernet port mapping and VLAN
configuration for each Ethernet VC."
INDEX { pwVcIndex, pwVcEnetPwVlan }
::= { pwVcEnetTable 1 }
PwVcEnetEntry ::= SEQUENCE {
pwVcEnetPwVlan PwVcVlanCfg,
pwVcEnetVlanMode INTEGER,
pwVcEnetMaxVlan PwVcVlanCfg,
pwVcEnetPortVlan PwVcVlanCfg,
pwVcEnetPortIfIndex InterfaceIndexOrZero,
pwVcEnetVcIfIndex InterfaceIndexOrZero,
pwVcEnetRowStatus RowStatus,
pwVcEnetStorageType StorageType
}
pwVcEnetPwVlan OBJECT-TYPE
SYNTAX PwVcVlanCfg
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"This Object defines the VLAN on the VC. The value of 4097
is used if the object is not applicable, for example when
mapping all packets from an Ethernet port to this VC.
The value of 4096 is used to indicate untagged frames (at
least from the PW point of view), for example if
pwVcEnetVlanMode is equal 'removeVLAN' or when
pwVcEnetVlanMode equal 'noChange' and pwVcEnetPortVlan
is equal 4096."
::= { pwVcEnetEntry 1 }
pwVcEnetVlanMode OBJECT-TYPE
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SYNTAX INTEGER {
portBased(0),
noChange(1),
changeVlan(2),
addVlan(3),
removeVlan(4),
rangeVlan(5)
}
MAX-ACCESS read-create
STATUS current
DESCRIPTION
"Indicate the mode of VLAN handling between the port
associated to the VC and the VC encapsulation itself.
- 'portBased' indicates that the forwarder will forward
packets to the PW independent of their structure,
based on the incoming port only.
- 'noChange' indicates that the VC contains the original
user VLAN, as specified in pwVcEnetPortVlan.
- 'changeVlan' indicates that the VLAN field on the VC
may be different than the VLAN field on the user's
port.
- 'removeVlan' indicates that the encapsulation on the
VC does not include the original VLAN field. Note
that PRI bits transparency is lost in this case.
- 'addVlan' indicate that a VLAN field will be added
on the PSN bound direction. pwVcEnetPwVlan indicate
the value that will be added.
- 'rangeVlan' indicate that all VLANs between
pwVcEnetPwVlan and pwVcEnetMaxVlan on the user port
will be associated to this VC. It is not possible to
change VLAN values on this mode.
- 'removeVlan', 'addVlan' and 'rangeVlan' implementation
is not required.
"
DEFVAL { noChange }
::= { pwVcEnetEntry 2 }
pwVcEnetMaxVlan OBJECT-TYPE
SYNTAX PwVcVlanCfg
MAX-ACCESS read-create
STATUS current
DESCRIPTION
"This object is used to define the MAX value of VLAN range
for this VC, and is in effect if pwVcEnetVlanMode is equal
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to 'rangeVlan', and must be greater or equal to
pwVcEnetPwVlan.
If a range is not used the value must be set to 0."
DEFVAL { 0 }
::= { pwVcEnetEntry 3 }
pwVcEnetPortVlan OBJECT-TYPE
SYNTAX PwVcVlanCfg
MAX-ACCESS read-create
STATUS current
DESCRIPTION
"This object define the VLAN value on the physical port (or
VPLS virtual port) if a change is required to the VLAN value
between the VC and the physical/virtual port.
This object MUST hold the value of 4097 (not relevant) if
the whole traffic from the port is forwarded to one VC
independent of the tagging on the port or if
pwVcEnetVlanMode is set to rangeVlan.
It MUST be equal to pwVcEnetPwVlan if 'noChange' mode
is used.
The value 4096 indicate that no VLAN (i.e. untagged
frames) on the port are associated to this VC. This
allows the same behaviors as assigning 'Default VLAN'
to un-tagged frames.
"
DEFVAL { 4097 }
::= { pwVcEnetEntry 4 }
pwVcEnetVcIfIndex OBJECT-TYPE
SYNTAX InterfaceIndexOrZero
MAX-ACCESS read-create
STATUS current
DESCRIPTION
"It is sometimes convenient to model the VC PW as a
virtual interface in the ifTable. In these cases this
object hold the value of the ifIndex in the ifTable
representing this VC PW. A value of zero indicate no such
association or association is not yet known."
::= { pwVcEnetEntry 5 }
pwVcEnetPortIfIndex OBJECT-TYPE
SYNTAX InterfaceIndexOrZero
MAX-ACCESS read-create
STATUS current
DESCRIPTION
"This object is used to specify the ifIndex of the ETHERNET
port associated with this VC for point-to-point Ethernet
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service, or the ifIndex of the virtual interface of the VPLS
instance associated with the PW if the service is VPLS. Two
rows in this table can point to the same ifIndex only if:
1) It is required to support multiple COS on a MPLS PSN
for the same service (i.e.: a combination of ports and
VLANs) by the use of multiple VC, each with a different
COS.
2) There is no overlap of VLAN values specified in
pwVcEnetPortVlan that are associated with this port.
A value of zero indicate that association to an ifIndex is
not yet known."
::= { pwVcEnetEntry 6 }
pwVcEnetRowStatus OBJECT-TYPE
SYNTAX RowStatus
MAX-ACCESS read-create
STATUS current
DESCRIPTION
"Enable creating, deleting and modifying this row."
-- TBD: Need to specify exact interaction with other tables, and
-- when rows can/cannot be created/deleted/modified.
::= { pwVcEnetEntry 7 }
pwVcEnetStorageType OBJECT-TYPE
SYNTAX StorageType
MAX-ACCESS read-create
STATUS current
DESCRIPTION
"Indicates the storage type of this row."
::= { pwVcEnetEntry 8 }
--
-- Ethernet Primary Mapping Table
--
pwVcEnetMplsPriMappingTable OBJECT-TYPE
SYNTAX SEQUENCE OF PwVcEnetMplsPriMappingTableEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"This table may be used for MPLS PSNs if there is a need
to hold multiple VC, each with different COS, for the same
user service (port + PW VLAN). Such a need may arise if the
MPLS network is capable of L-LSP or E-LSP without multiple
COS capabilities. Each row is indexed by the pwVcIndex
and indicate the PRI bits on the packet recieved from the
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user port (or VPLS virtual port) that are
classified to this VC. Note that the EXP bit value of the VC
is configured in the PW-MPLS-MIB."
::= { pwVcEnetObjects 2 }
pwVcEnetMplsPriMappingTableEntry OBJECT-TYPE
SYNTAX PwVcEnetMplsPriMappingTableEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"Each entry is created if special classification based on
the PRI bits is required for this VC."
INDEX { pwVcIndex }
::= { pwVcEnetMplsPriMappingTable 1 }
PwVcEnetMplsPriMappingTableEntry ::= SEQUENCE {
pwVcEnetMplsPriMapping BITS,
pwVcEnetMplsPriMappingRowStatus RowStatus,
pwVcEnetMplsPriMappingStorageType StorageType
}
pwVcEnetMplsPriMapping OBJECT-TYPE
SYNTAX BITS {
pri000 (0),
pri001 (1),
pri010 (2),
pri011 (3),
pri100 (4),
pri101 (5),
pri110 (6),
pri111 (7),
untagged (8)
}
MAX-ACCESS read-create
STATUS current
DESCRIPTION
"This object defines the groups of user PRI mapped into
this VC. Each bit set indicates that this user priority
is assigned to this VC.
The value 'untagged' is used to indicate that untagged
frames are also associated to this VC.
This object allow the use of different PSN COS based on
user marking of PRI bits in MPLS PSN with L-LSP or
E-LSP without multiple COS support. In all other cases,
the default value MUST be used.
It is REQUIRED that there is no overlap on this object
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between rows serving the same service (port+ PW VLAN).
In case of missing BIT configuration between rows to
the same service, incoming packets with PRI marking not
configured should be handled by the VC with the lowest
COS.
"
REFERENCE
"See appendix A of <draft-ietf-pwe3i-ethernet-encap>
for mapping rules of the PRI bits to PSN COS."
::= { pwVcEnetMplsPriMappingTableEntry 1 }
pwVcEnetMplsPriMappingRowStatus OBJECT-TYPE
SYNTAX RowStatus
MAX-ACCESS read-create
STATUS current
DESCRIPTION
"Enable creating, deleting and modifying this row."
-- TBD: Need to specify exact interaction with other tables, and
-- when rows can/cannot be created/deleted/modified.
::= { pwVcEnetMplsPriMappingTableEntry 2 }
pwVcEnetMplsPriMappingStorageType OBJECT-TYPE
SYNTAX StorageType
MAX-ACCESS read-create
STATUS current
DESCRIPTION
"Indicates the storage type of this row."
::= { pwVcEnetMplsPriMappingTableEntry 3 }
--
-- VC Ethernet Statistics Table
--
pwVcEnetStatsTable OBJECT-TYPE
SYNTAX SEQUENCE OF PwVcEnetStatsEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"This table contains statistical counters specific for
Ethernet PW."
::= { pwVcEnetObjects 3 }
pwVcEnetStatsEntry OBJECT-TYPE
SYNTAX PwVcEnetStatsEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"Each entry represents the statistics gathered for the
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VC carrying the Ethernet packets since this VC was
first created in the pwVcEnetTable."
INDEX { pwVcIndex }
::= { pwVcEnetStatsTable 1 }
PwVcEnetStatsEntry ::= SEQUENCE {
pwVcEnetStatsIllegalVlan Counter64,
pwVcEnetStatsIllegalLength Counter64
}
pwVcEnetStatsIllegalVlan OBJECT-TYPE
SYNTAX Counter64
MAX-ACCESS read-write
STATUS current
DESCRIPTION
"The number of packets received (from the PSN) on this VC with
an illegal VLAN field, missing VLAN field that was expected, or
A VLAN field when it was not expected. This counter is not
relevant if the VC type is 'ethernet' (i.e. raw mode), and
should be set to 0 by the agent to indicate this."
::= { pwVcEnetStatsEntry 1 }
pwVcEnetStatsIllegalLength OBJECT-TYPE
SYNTAX Counter64
MAX-ACCESS read-write
STATUS current
DESCRIPTION
"The number of packets that were received with an illegal
Ethernet packet length on this VC. An illegal length is defined
as being greater than the value in the advertised maximum MTU
supported, or shorter than the allowed Ethernet packet size."
::= { pwVcEnetStatsEntry 2 }
---
--- Conformance description
--- In this version of the draft, only objects level conformance is
--- defined. More detailed conformance specifications is FFS.
---
pwVcEnetGroups OBJECT IDENTIFIER ::= { pwVcEnetConformance 1 }
pwVcEnetCompliances OBJECT IDENTIFIER ::= { pwVcEnetConformance 2 }
pwVcEnetModuleCompliance MODULE-COMPLIANCE
STATUS current
DESCRIPTION
"The compliance statement for agent that support
Ethernet PW."
MODULE -- this module
MANDATORY-GROUPS { pwVcEnetGroup,
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pwVcStatsGroup
}
GROUP pwVcEnetMplsPriGroup
DESCRIPTION
"Collection of objects defining classification to
different PW based on the user's PRI bits mapping.
This group is optional, and should be implemented
only for MPLS PSN where only L-LSP or single OA
E-LSP, exists, and different PSN COS is required
based on the PRI mapping."
::= { pwVcEnetCompliances 1 }
-- Units of conformance.
pwVcEnetGroup OBJECT-GROUP
OBJECTS {
pwVcEnetVlanMode,
pwVcEnetMaxVlan,
pwVcEnetPortVlan,
pwVcEnetPortIfIndex,
pwVcEnetVcIfIndex,
pwVcEnetRowStatus,
pwVcEnetStorageType
}
STATUS current
DESCRIPTION
"Collection of objects for basic Ethernet PW config."
::= { pwVcEnetGroups 1 }
pwVcStatsGroup OBJECT-GROUP
OBJECTS {
pwVcEnetStatsIllegalVlan,
pwVcEnetStatsIllegalLength
}
STATUS current
DESCRIPTION
"Collection of objects counting various PW level errors."
::= { pwVcEnetGroups 2 }
pwVcEnetMplsPriGroup OBJECT-GROUP
OBJECTS {
pwVcEnetMplsPriMapping,
pwVcEnetMplsPriMappingRowStatus,
pwVcEnetMplsPriMappingStorageType
}
STATUS current
DESCRIPTION
"Collection of objects defining classification to
different PW based on the user's PRI bits mapping.
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This group is optional, and should be implemented
only for MPLS PSN where only L-LSP or single OA
E-LSP exists, and different PSN COS is required
based on the PRI mapping."
::= { pwVcEnetGroups 3 }
END
8 Security Considerations
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.
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.
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9 References
[ENETPW] Martini et al, "Encapsulation Methods for Transport of
Ethernet Frames Over IP/MPLS Networks", <draft-ietf-
pw3ei-ethernet-encap-00.txt>, August 2002.
[FRMWK] Pate et al, "Framework for Pseudo Wire Emulation Edge-
to-Edge (PWE3)", <draft-ietf-pwe3-framework-01.txt>,
June 2002.
[PWREQ] Xiao et al, "Requirements for Pseudo Wire Emulation
Edge-to-Edge (PWE3)", <draft-ietf-pwe3-requirements-
03.txt>, June 2002.
[PWLAYER] Bryant, et al., "Protocol Layering in PWE3", <draft-
ietf-pwe3-protocol-layer-00.txt>, May 2002.
[VPLS] Augustyn et al, "Requirements for Virtual Private LAN
Services (VPLS)", <draft-augustyn-vpls-requirements-
01.txt>, February 2002.
[PWTC] Nadeau, T., et al, "Definitions for Textual Conventions
and OBJECT-IDENTITIES for Pseudo-Wires Management",
<draft-ietf-pw-tc-mib-00.txt>, June 2002.
[PWMIB] Zelig et al, Pseudo Wire (PW) Management Information
Base÷, <draft-ietf-pwe3-pw-mib-00.txt>, June 2002.
[PWMPLSMIB] Zelig et al, Pseudo Wire (PW) Over MPLS PSN Management
Information Base÷, <draft-ietf-pwe3-pw-mpls-mib-00.txt>,
June 2002.
[ENETLIKE] Flick, J., "Definitions of Managed Objects for the
Ethernet-like Interface Types", <draft-ietf-hubmib-
etherif-mib-v3-02.txt>, May 2002.
[IANAFamily] Internet Assigned Numbers Authority (IANA), ADDRESS
FAMILY NUMBERS, (http://www.isi.edu/in-
notes/iana/assignements/address-family-numbers), for MIB
see: ftp://ftp.isi.edu/mib/ianaaddressfamilynumbers.mib
[IFMIB] McCloghrie, K., and F. Kastenholtz, "The Interfaces
Group MIB using SMIv2", RFC 2863, January 2000.
[BCP14] Bradner, S., "Key words for use in RFCs to Indicate
requirement Levels", BCP 14, RFC 2119, March 1997.
[RFC2571] Harrington, D., Presuhn, R., and B. Wijnen, "An
Architecture for Describing SNMP Management Frameworks",
RFC 2571, April 1999.
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[RFC1155] Rose, M., and K. McCloghrie, "Structure and
Identification of Management Information for TCP/IP-
based Internets", STD 16, RFC 1155, May 1990.
[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.
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[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,
"Introduction to Version 3 of the Internet-standard
Network Management Framework", RFC 2570, April 1999.
0 Author's Addresses
David Zelig
Corrigent Systems
126, Yigal Alon st.
Tel Aviv, ISRAEL
Phone: +972-3-6945273
Email: davidz@corrigent.com
Thomas D. Nadeau
Cisco Systems, Inc.
250 Apollo Drive
Chelmsford, MA 01824
Email: tnadeau@cisco.com
1 Full Copyright Statement
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Zelig et al Expires February 2003 [page 20]
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WILL NOT INFRINGE ANY RIGHTS OR ANY IMPLIED WARRANTIES OF
MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE.
Zelig et al Expires February 2003 [page 21]