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RFC 4631

Link Management Protocol (LMP) Management Information Base (MIB)

Pages: 83
Proposed Standard
Errata
Obsoletes:  4327
Part 1 of 3 – Pages 1 to 11
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Network Working Group                                           M. Dubuc
Request for Comments: 4631                                     T. Nadeau
Obsoletes: 4327                                            Cisco Systems
Category: Standards Track                                        J. Lang
                                                             Sonos, Inc.
                                                             E. McGinnis
                                                      Hammerhead Systems
                                                               A. Farrel
                                                      Old Dog Consulting
                                                          September 2006


    Link Management Protocol (LMP) Management Information Base (MIB)

Status of This Memo

   This document specifies an Internet standards track protocol for the
   Internet community, and requests discussion and suggestions for
   improvements.  Please refer to the current edition of the "Internet
   Official Protocol Standards" (STD 1) for the standardization state
   and status of this protocol.  Distribution of this memo is unlimited.

Copyright Notice

   Copyright (C) The Internet Society (2006).

Abstract

This document provides minor corrections to and obsoletes RFC 4327. This memo defines a 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 the Link Management Protocol (LMP).
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Table of Contents

1. The Internet-Standard Management Framework ......................3 2. Introduction ....................................................3 3. Terminology .....................................................3 4. Feature Checklist ...............................................4 5. Outline .........................................................4 6. Brief Description of MIB Objects ................................5 6.1. lmpNbrTable ................................................5 6.2. lmpControlChannelTable .....................................5 6.3. lmpControlChannelPerfTable .................................5 6.4. lmpTeLinkTable .............................................5 6.5. lmpLinkVerificationTable ...................................5 6.6. lmpTeLinkPerfTable .........................................6 6.7. lmpDataLinkTable ...........................................6 6.8. lmpDataLinkPerfTable .......................................6 7. Example of LMP Control Channel Setup ............................6 8. Application of the Interfaces Group to LMP ......................9 8.1. Support of the LMP Layer by ifTable .......................10 9. LMP MIB Module Definitions .....................................11 10. Security Considerations .......................................78 11. Contributors ..................................................79 12. Acknowledgements ..............................................79 13. IANA Considerations ...........................................79 13.1. IANA Considerations for LMP ifType .......................79 13.2. IANA Considerations for LMP-MIB ..........................79 14. Changes from RFC 4327 to RFC 4631 .............................79 15. References ....................................................80 15.1. Normative References .....................................80 15.2. Informative References ...................................81
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1. 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, RFC 2578 [RFC2578], STD 58, RFC 2579 [RFC2579] and STD 58, RFC 2580 [RFC2580].

2. Introduction

Current work is under way in the IETF to specify a suite of protocols to be used as a common control plane and a separate common measurement plane. Generalized MPLS (GMPLS) [RFC3471] and the Link Management Protocol [RFC4204] are key components of this standardization activity. The primary purpose of LMP is to manage traffic engineering (TE) links. Primary goals of LMP are the maintenance of the control channel connectivity, correlation of link properties, verification of data-bearing links, and detection and isolation of link faults. We describe in this document a MIB module that can be used to manage LMP implementations. This MIB module covers both configuration and performance-monitoring aspects of LMP. 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 [RFC2119].

3. Terminology

This document uses terminology from the document describing the Link Management Protocol [RFC4204]. An "LMP adjacency" is formed between two nodes that support the same capabilities, and LMP messages are exchanged between the node pair over control channels that form this adjacency. Several control channels can be active at the same time. With the exception of messages related to control channel management, anytime an LMP message needs to be transferred to a neighbor node, it can be sent on any of the active control channels. The control channels can also be used to exchange MPLS control plane information or routing information.
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   LMP is designed to support aggregation of one or more data-bearing
   links into a traffic-engineering (TE) link.  The data-bearing links
   can be either component links or ports, depending on their
   multiplexing capability (see [RFC4204] for the distinction between
   port and component link).

   Each TE link is associated with an LMP adjacency, and one or more
   control channels are used to exchange LMP messages for a particular
   adjacency.  In turn, control channels are used to manage the TE links
   associated with the LMP adjacency.

4. Feature Checklist

The Link Management Protocol MIB module (LMP-MIB) is designed to satisfy the following requirements and constraints: - The MIB module supports the enabling and disabling of LMP capability on LMP-capable interfaces of a photonic switch, optical cross-connect, or router. - The MIB module is used to provide information about LMP adjacencies. - Support is provided for configuration of the keep-alive and link verification parameters. - The MIB module is used to express the mapping between local and remote TE links, as well as local and remote interface identifiers for port or component link. - Performance counters are provided for measuring LMP performance on a per-control channel basis. Performance counters are also provided for measuring LMP performance on the data-bearing links. Note that the LMP MIB module goes hand-in-hand with the TE Link (TE- LINK-STD-MIB) MIB module [RFC4220]. The TE link table, which is used to associate data-bearing links to TE links, is defined in the TE Link MIB. The TE link table in the LMP MIB module contains TE link information specific to LMP.

5. Outline

Configuring LMP through an optical device involves the following steps: - Enabling LMP on LMP-capable interfaces through control channel configuration.
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   -  Optionally, specifying link verification parameters.

   -  Configuring the data-bearing links and associating them to the
      appropriate TE link (this association is stored in the
      ifStackTable of the Interfaces Group MIB).

   TE links are managed by the control channels that run between the
   same pair of nodes (LMP adjacency).

6. Brief Description of MIB Objects

Sections 6.1 - 6.8 describe objects pertaining to LMP. The MIB objects were derived from the LMP document [RFC4204].

6.1. lmpNbrTable

The remote node table is used to identify the pair of nodes that exchange LMP messages over control channels.

6.2. lmpControlChannelTable

The control channel table is used for enabling the LMP protocol on LMP-capable interfaces. A photonic switch, optical cross-connect, or router creates an entry in this table for every LMP-capable interface in that device.

6.3. lmpControlChannelPerfTable

The control channel performance table is used for collecting LMP performance counts on a per-control channel basis. Each entry in the lmpControlChannelTable has a corresponding entry in the lmpControlChannelPerfTable.

6.4. lmpTeLinkTable

The TE link table is used for specifying LMP information associated with TE links.

6.5. lmpLinkVerificationTable

The link verification table is used for configuring the LMP link verification parameters of TE links. For every TE link entry in the lmpTeLinkTable that supports the link verification procedure, there is a corresponding entry in the lmpLinkVerificationTable.
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6.6. lmpTeLinkPerfTable

The TE link performance table is used for collecting LMP performance counts on a per-TE link basis. Each entry in the lmpTeLinkTable has a corresponding entry in the lmpTeLinkPerfTable.

6.7. lmpDataLinkTable

The data-bearing link table is used to specify the data-bearing links that are associated with TE links.

6.8. lmpDataLinkPerfTable

The data-bearing link performance table is used for collecting LMP performance counts on data-bearing links.

7. Example of LMP Control Channel Setup

In this section, we provide a brief example of using the MIB objects described in Section 9 to set up an LMP control channel. This example is not meant to illustrate every nuance of the MIB module, but it is intended as an aid to understanding some of the key concepts. It is meant to be read after one goes through the MIB itself. Suppose that one would like to form an LMP adjacency between two nodes using two control channels. Suppose also that there are three data-bearing links. We also assume that the data-bearing links are ports (lambdas) and that the link verification procedure is not enabled. The following example illustrates which rows and corresponding objects might be created to accomplish this. First, LMP must be enabled between the pair of nodes. In lmpNbrTable: { lmpNbrNodeId = 'c0000201'H, -- 192.0.2.1 lmpNbrAdminStatus = up(1), lmpNbrRowStatus = createAndGo(4), lmpNbrStorageType = nonVolatile(3) } Then, the control channels must be set up. These are created in the lmpControlChannelTable. In lmpControlChannelTable: { lmpCcId = 1,
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      lmpCcUnderlyingIfIndex            = 1,
      lmpCcIsIf                         = false(2),
      lmpCcAuthentication               = false(2),
      lmpCcHelloInterval                = 15,
      lmpCcHelloIntervalMin             = 15,
      lmpCcHelloIntervalMax             = 1000,
      lmpCcHelloDeadInterval            = 45,
      lmpCcHelloDeadIntervalMin         = 45,
      lmpCcHelloDeadIntervalMax         = 1000,
      lmpCcAdminStatus                  = up(1),
      lmpCcRowStatus                    = createAndGo(4),
      lmpCcStorageType                  = nonVolatile(3)
   }

   {
      lmpCcId                           = 2,
      lmpCcUnderlyingIfIndex            = 2,
      lmpCcIsIf                         = false(2),
      lmpCcAuthentication               = false(2),
      lmpCcHelloInterval                = 15,
      lmpCcHelloIntervalMin             = 15,
      lmpCcHelloIntervalMax             = 1000,
      lmpCcHelloDeadInterval            = 45,
      lmpCcHelloDeadIntervalMin         = 45,
      lmpCcHelloDeadIntervalMax         = 1000,
      lmpCcAdminStatus                  = up(1),
      lmpCcRowStatus                    = createAndGo(4),
      lmpCcStorageType                  = nonVolatile(3)
   }

   Next, the three data-bearing links are created.  For each data-
   bearing link, an ifEntry with the same ifIndex needs to be created
   beforehand.

      In lmpDataLinkTable:
   {
      ifIndex                         = 41,
      lmpDataLinkAddressType          = unknown(0),
      lmpDataLinkIpAddr               = ''H,
      lmpDataLinkRemoteIpAddress      = ''H,
      lmpDataLinkRemoteIfId           = 47,
      lmpDataLinkRowStatus            = createAndGo(4),
      lmpDataLinkStorageType          = nonVolatile(3)
   }

   {
      ifIndex                         = 43,
      lmpDataLinkAddressType          = unknown(0),
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      lmpDataLinkIpAddr               = ''H,
      lmpDataLinkRemoteIpAddress      = ''H,
      lmpDataLinkRemoteIfId           = 42,
      lmpDataLinkRowStatus            = createAndGo(4),
      lmpDataLinkStorageType          = nonVolatile(3)
   }
   {
      ifIndex                         = 44,
      lmpDataLinkAddressType          = unknown(0),
      lmpDataLinkIpAddr               = ''H,
      lmpDataLinkRemoteIpAddress      = ''H,
      lmpDataLinkRemoteIfId           = 48,
      lmpDataLinkRowStatus            = createAndGo(4),
      lmpDataLinkStorageType          = nonVolatile(3)
   }

   Note that the data-bearing link type (lmpDataLinkType) does not need
   to be provisioned, as it is automatically populated by the node.  The
   definition of the protection role (primary or secondary) for the
   data-bearing links is stored in the componentLinkTable of the TE Link
   MIB module [RFC4220].

   Then, a TE link is created as an ifEntry with ifType teLink in the
   ifTable.

   Once the TE link is created in the ifTable, a TE link entry is
   created in the LMP MIB module to specify TE link information specific
   to LMP.

      In lmpTeLinkTable:
   {
      ifIndex                     = 20,
      lmpTeLinkVerification       = true(1),
      lmpTeLinkFaultManagement    = true(1),
      lmpTeLinkDwdm               = false(2),
      lmpTeLinkRowStatus          = createAndGo(4),
      lmpTeLinkStorageType        = nonVolatile(3)
   }

   and in lmpLinkVerificationTable:
   {
      ifIndex                         = 20,
      lmpLinkVerifyInterval           = 100,
      lmpLinkVerifyDeadInterval       = 300,
      lmpLinkVerifyTransportMechanism = j0Trace(3),
      lmpLinkVerifyAllLinks           = true(1),
      lmpLinkVerifyTransmissionRate   = 100000,
      lmpLinkVerifyWavelength         = 0,
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      lmpLinkVerifyRowStatus          = createAndGo(4),
      lmpLinkVerifyStorageType        = nonVolatile(3)
   }

   The association between the data-bearing links and the TE links is
   stored in the ifStackTable [RFC2863].

   In parallel with the entry created in the lmpTeLinkTable, an entry
   may be created in the teLinkTable of the TE Link MIB module
   [RFC4220].

8. Application of the Interfaces Group to LMP

The Interfaces Group [RFC2863] defines generic managed objects for managing interfaces. This memo contains the media-specific extensions to the Interfaces Group for managing LMP control channels that are modeled as interfaces. If the control channel as defined in the lmpControlChannelTable is modeled as an ifEntry, then the following definition applies. An lmpControlChannelTable entry is designated as being represented as an Interfaces MIB ifEntry if the lmpControlChannelEntry object lmpCcIsIf is set to true (1). In this case, the control channel SHOULD be modeled as an ifEntry and provide appropriate interface stacking, as defined below. This memo assumes the interpretation of the Interfaces Group to be in accordance with [RFC2863], which states that the interfaces table (ifTable) contains information on the managed resource's interfaces and that each sub-layer below the internetwork layer of a network interface is considered an interface. Since the LMP interface only carries control traffic, it is considered to be below the internetwork layer. Thus, the LMP interface may be represented as an entry in the ifTable. The interrelation of entries in the ifTable is defined by Interfaces Stack Group defined in [RFC2863]. When LMP control channels are modeled as interfaces, the interface stack table must appear as follows for the LMP control channel interfaces: +----------------------------------------+ | LMP-interface ifType = lmp(227) + +----------------------------------------+ | Underlying Layer... + +----------------------------------------+ In the above diagram, "Underlying Layer..." refers to the ifIndex of any interface type over which the LMP interface will transmit its traffic. Note that if the underlying layer provides multiple access
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   to its media (i.e., Ethernet), then it is possible to stack multiple
   LMP interfaces on top of this interface in parallel.

   Note that it is not a requirement that LMP control channels be
   modeled as interfaces.  It is acceptable that control channels simply
   exist as logical connections between adjacent LMP-capable nodes.  In
   this case, lmpCcIsIf is set to false(2), and no corresponding entry
   is made in the ifTable.

8.1. Support of the LMP Layer by ifTable

Some specific interpretations of ifTable for the LMP layer follow. Object Use for the LMP layer. ifIndex Each LMP interface may be represented by an ifEntry. ifDescr Description of the LMP interface. ifType The value that is allocated for LMP is 227. This number has been assigned by the IANA. ifSpeed The total bandwidth in bits per second for use by the LMP layer. ifPhysAddress Unused. ifAdminStatus This variable indicates the administrator's intent as to whether LMP should be enabled, disabled, or running in some diagnostic testing mode on this interface. Also see [RFC2863]. ifOperStatus This value reflects the actual or operational status of LMP on this interface. ifLastChange See [RFC2863]. ifInOctets The number of received octets over the interface; i.e., the number of octets received as LMP packets. ifOutOctets The number of transmitted octets over the interface; i.e., the number of octets transmitted as LMP packets. ifInErrors The number of LMP packets dropped due to uncorrectable errors.
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   ifInUnknownProtos
                 The number of received packets discarded during packet
                 header validation, including packets with unrecognized
                 label values.

   ifOutErrors   See [RFC2863].

   ifName        Textual name (unique on this system) of the interface
                 or an octet string of zero length.

   ifLinkUpDownTrapEnable
                 Default is disabled (2).

   ifConnectorPresent
                 Set to false (2).

   ifHighSpeed   See [RFC2863].

   ifHCInOctets  The 64-bit version of ifInOctets; supported if required
                 by the compliance statements in [RFC2863].

   ifHCOutOctets The 64-bit version of ifOutOctets; supported if
                 required by the compliance statements in [RFC2863].

   ifAlias       The nonvolatile 'alias' name for the interface, as
                 specified by a network manager.

   ifCounterDiscontinuityTime
                 See [RFC2863].



(page 11 continued on part 2)

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