Dynamic Placement of Multi-Segment Pseudowires
RFC 7267
| Document | Type |
RFC - Proposed Standard
(June 2014; No errata)
Updates RFC 6073
|
|
|---|---|---|---|
| Last updated | 2015-10-14 | ||
| Stream | IETF | ||
| Formats | plain text pdf html bibtex | ||
| Reviews | |||
| Stream | WG state | Submitted to IESG for Publication (wg milestone: Aug 2012 - Dynamic MS PW LC... ) | |
| Document shepherd | Loa Andersson | ||
| Shepherd write-up | Show (last changed 2013-10-09) | ||
| IESG | IESG state | RFC 7267 (Proposed Standard) | |
| Consensus Boilerplate | Yes | ||
| Telechat date | |||
| Responsible AD | Adrian Farrel | ||
| Send notices to | (None) | ||
| IANA | IANA review state | Version Changed - Review Needed | |
| IANA action state | RFC-Ed-Ack | ||
Internet Engineering Task Force (IETF) L. Martini, Ed.
Request for Comments: 7267 Cisco Systems, Inc.
Updates: 6073 M. Bocci, Ed.
Category: Standards Track F. Balus, Ed.
ISSN: 2070-1721 Alcatel-Lucent
June 2014
Dynamic Placement of Multi-Segment Pseudowires
Abstract
RFC 5254 describes the service provider requirements for extending
the reach of pseudowires (PWs) across multiple Packet Switched
Network domains. A multi-segment PW is defined as a set of two or
more contiguous PW segments that behave and function as a single
point-to-point PW. This document describes extensions to the PW
control protocol to dynamically place the segments of the multi-
segment pseudowire among a set of Provider Edge (PE) routers. This
document also updates RFC 6073 by updating the value of the Length
field of the PW Switching Point PE Sub-TLV Type 0x06 to 14.
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 5741.
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/rfc7267.
Martini, et al. Standards Track [Page 1]
RFC 7267 Dynamic Placement of Multi-Segment PWs June 2014
Copyright Notice
Copyright (c) 2014 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
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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, et al. Standards Track [Page 2]
RFC 7267 Dynamic Placement of Multi-Segment PWs June 2014
Table of Contents
1. Introduction ....................................................4
1.1. Scope ......................................................4
1.2. Specification of Requirements ..............................4
1.3. Terminology ................................................4
1.4. Architecture Overview ......................................5
2. Applicability ...................................................6
2.1. Changes to Existing PW Signaling ...........................6
3. PW Layer 2 Addressing ...........................................6
3.1. Attachment Circuit Addressing ..............................7
3.2. S-PE Addressing ............................................8
4. Dynamic Placement of MS-PWs .....................................8
4.1. Pseudowire Routing Procedures ..............................8
4.1.1. AII PW Routing Table Lookup Aggregation Rules .......9
4.1.2. PW Static Route .....................................9
4.1.3. Dynamic Advertisement with BGP .....................10
4.2. LDP Signaling .............................................11
4.2.1. Multiple Alternative Paths in PW Routing ...........13
4.2.2. Active/Passive T-PE Election Procedure .............14
4.2.3. Detailed Signaling Procedures ......................15
5. Procedures for Failure Handling ................................16
5.1. PSN Failures ..............................................16
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