Pseudowire Setup and Maintenance Using the Label Distribution Protocol (LDP)
RFC 8077
| Document | Type |
RFC - Internet Standard
(February 2017; No errata)
Also known as STD 84
|
|
|---|---|---|---|
| Last updated | 2017-02-02 | ||
| Replaces | draft-ietf-pwe3-rfc4447bis | ||
| Stream | IETF | ||
| Formats | plain text pdf html bibtex | ||
| Reviews | |||
| Stream | WG state | Submitted to IESG for Publication | |
| Document shepherd | Stewart Bryant | ||
| Shepherd write-up | Show (last changed 2016-08-23) | ||
| IESG | IESG state | RFC 8077 (Internet Standard) | |
| Consensus Boilerplate | Yes | ||
| Telechat date | |||
| Responsible AD | Deborah Brungard | ||
| Send notices to | draft-ietf-pals-rfc4447bis.all@ietf.org, "Stewart Bryant" <stewart.bryant@gmail.com> | ||
| IANA | IANA review state | IANA OK - Actions Needed | |
| IANA action state | RFC-Ed-Ack | ||
Internet Engineering Task Force (IETF) L. Martini, Ed.
Request for Comments: 8077 G. Heron, Ed.
STD: 84 Cisco
Obsoletes: 4447, 6723 February 2017
Category: Standards Track
ISSN: 2070-1721
Pseudowire Setup and Maintenance
Using the Label Distribution Protocol (LDP)
Abstract
Layer 2 services (such as Frame Relay, Asynchronous Transfer Mode,
and Ethernet) can be emulated over an MPLS backbone by encapsulating
the Layer 2 Protocol Data Units (PDUs) and then transmitting them
over pseudowires (PWs). It is also possible to use pseudowires to
provide low-rate Time-Division Multiplexed and Synchronous Optical
NETworking circuit emulation over an MPLS-enabled network. This
document specifies a protocol for establishing and maintaining the
pseudowires, using extensions to the Label Distribution Protocol
(LDP). Procedures for encapsulating Layer 2 PDUs are specified in
other documents.
This document is a rewrite of RFC 4447 for publication as an Internet
Standard.
Status of This Memo
This is an Internet Standards Track document.
This document is a product of the Internet Engineering Task Force
(IETF). It represents the consensus of the IETF community. It has
received public review and has been approved for publication by the
Internet Engineering Steering Group (IESG). Further information on
Internet Standards is available in Section 2 of RFC 7841.
Information about the current status of this document, any errata,
and how to provide feedback on it may be obtained at
http://www.rfc-editor.org/info/rfc8077.
Martini & Heron Standards Track [Page 1]
RFC 8077 PWE3 Using LDP February 2017
Copyright Notice
Copyright (c) 2017 IETF Trust and the persons identified as the
document authors. All rights reserved.
This document is subject to BCP 78 and the IETF Trust's Legal
Provisions Relating to IETF Documents
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described in the Simplified BSD License.
This document may contain material from IETF Documents or IETF
Contributions published or made publicly available before November
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material may not have granted the IETF Trust the right to allow
modifications of such material outside the IETF Standards Process.
Without obtaining an adequate license from the person(s) controlling
the copyright in such materials, this document may not be modified
outside the IETF Standards Process, and derivative works of it may
not be created outside the IETF Standards Process, except to format
it for publication as an RFC or to translate it into languages other
than English.
Martini & Heron Standards Track [Page 2]
RFC 8077 PWE3 Using LDP February 2017
Table of Contents
1. Introduction ....................................................4
2. Changes from RFC 4447 ...........................................6
3. Specification of Requirements ...................................6
4. The Pseudowire Label ............................................7
5. Details Specific to Particular Emulated Services ................9
5.1. IP Layer 2 Transport .......................................9
6. LDP .............................................................9
6.1. The PWid FEC Element .......................................9
6.2. The Generalized PWid FEC Element ..........................11
6.2.1. Attachment Identifiers .............................12
6.2.2. Encoding the Generalized PWid FEC Element ..........14
6.2.2.1. PW Interface Parameters TLV ...............15
6.2.2.2. PW Group ID TLV ...........................15
6.2.3. Signaling Procedures ...............................16
6.3. Signaling of Pseudowire Status ............................17
6.3.1. Use of Label Mapping Messages ......................17
6.3.2. Signaling PW Status ................................18
6.3.3. Pseudowire Status Negotiation Procedures ...........19
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