A Transport Network View of the Link Management Protocol (LMP)
RFC 4394
Document | Type | RFC - Informational (February 2006; No errata) | |
---|---|---|---|
Authors | Jonathan Lang , Dimitri Papadimitriou , Deborah Brungard , Don Fedyk , Osama Aboul-Magd | ||
Last updated | 2013-03-02 | ||
Replaces | draft-aboulmagd-ccamp-transport-lmp | ||
Stream | IETF | ||
Formats | plain text html pdf htmlized bibtex | ||
Stream | WG state | (None) | |
Document shepherd | No shepherd assigned | ||
IESG | IESG state | RFC 4394 (Informational) | |
Action Holders |
(None)
|
||
Consensus Boilerplate | Unknown | ||
Telechat date | |||
Responsible AD | Alex Zinin | ||
Send notices to | kireeti@juniper.net, adrian@olddog.co.uk |
Network Working Group D. Fedyk Request for Comments: 4394 O. Aboul-Magd Category: Informational Nortel Networks D. Brungard AT&T J. Lang Sonos, Inc. D. Papadimitriou Alcatel February 2006 A Transport Network View of the Link Management Protocol (LMP) Status of This Memo This memo provides information for the Internet community. It does not specify an Internet standard of any kind. Distribution of this memo is unlimited. Copyright Notice Copyright (C) The Internet Society (2006). Abstract The Link Management Protocol (LMP) has been developed as part of the Generalized MPLS (GMPLS) protocol suite to manage Traffic Engineering (TE) resources and links. The GMPLS control plane (routing and signaling) uses TE links for establishing Label Switched Paths (LSPs). This memo describes the relationship of the LMP procedures to 'discovery' as defined in the International Telecommunication Union (ITU-T), and ongoing ITU-T work. This document provides an overview of LMP in the context of the ITU-T Automatically Switched Optical Networks (ASON) and transport network terminology and relates it to the ITU-T discovery work to promote a common understanding for progressing the work of IETF and ITU-T. Fedyk, et al. Informational [Page 1] RFC 4394 Transport Network View of LMP February 2006 Table of Contents 1. Introduction ....................................................2 2. ASON Terminology and Abbreviations Related to Discovery .........3 2.1. Terminology ................................................3 2.2. Abbreviations ..............................................4 3. Transport Network Architecture ..................................5 3.1. G.8080 Discovery Framework .................................7 4. Discovery Technologies ..........................................9 4.1. Generalized Automatic Discovery Techniques G.7714 ..........9 4.2. LMP and G.8080 Terminology Mapping .........................9 4.2.1. TE Link Definition and Scope .......................12 4.3. LMP and G.8080 Discovery Relationship .....................13 4.4. Comparing LMP and G.8080 ..................................14 5. Security Considerations ........................................15 6. Informative References .........................................15 7. Acknowledgements ...............................................16 1. Introduction The GMPLS control plane consists of several building blocks as described in [RFC3945]. The building blocks include signaling, routing, and link management for establishing LSPs. For scalability purposes, multiple physical resources can be combined to form a single TE link for the purposes of path computation and GMPLS control plane signaling. As manual provisioning and management of these links are impractical in large networks, LMP was specified to manage TE links. Two mandatory management capabilities of LMP are control channel management and TE link property correlation. Additional optional capabilities include verifying physical connectivity and fault management. [LMP] defines the messages and procedures for GMPLS TE link management. [LMP-TEST] defines SONET/SDH-specific messages and procedures for link verification. ITU-T Recommendation G.8080 Amendment 1 [G.8080] defines control plane discovery as two separate processes; one process occurs within the transport plane space and the other process occurs within the control plane space. The ITU-T has developed Recommendation G.7714, "Generalized automatic discovery techniques" [G.7714], defining the functional processes and information exchange related to transport plane discovery aspects, i.e., layer adjacency discovery and physical media adjacency discovery. Specific methods and protocols are not defined in Recommendation G.7714. ITU-T Recommendation G.7714.1, "Protocol for automatic discovery in SDH and OTN networks" [G.7714.1], defines a Fedyk, et al. Informational [Page 2] RFC 4394 Transport Network View of LMP February 2006 protocol and procedure for transport plane layer adjacency discovery (e.g., discovering the transport plane layer endpoint relationshipsShow full document text