Pseudowire Status for Static Pseudowires
RFC 6478
| Document | Type |
RFC - Proposed Standard
(May 2012; No errata)
Updated by RFC 7274
Updates RFC 5885
|
|
|---|---|---|---|
| Last updated | 2015-10-14 | ||
| Replaces | draft-martini-pwe3-static-pw-status | ||
| Stream | IETF | ||
| Formats | plain text pdf html bibtex | ||
| Reviews | |||
| Stream | WG state | Submitted to IESG for Publication | |
| Document shepherd | Andrew Malis | ||
| IESG | IESG state | RFC 6478 (Proposed Standard) | |
| Consensus Boilerplate | Unknown | ||
| Telechat date | |||
| Responsible AD | Stewart Bryant | ||
| IESG note | Andy Malis (amalis@gmail.com) is the document shepherd. | ||
| Send notices to | (None) | ||
Internet Engineering Task Force (IETF) L. Martini
Request for Comments: 6478 G. Swallow
Updates: 5885 G. Heron
Category: Standards Track Cisco
ISSN: 2070-1721 M. Bocci
Alcatel-Lucent
May 2012
Pseudowire Status for Static Pseudowires
Abstract
This document specifies a mechanism to signal Pseudowire (PW) status
messages using a PW associated channel (ACh). Such a mechanism is
suitable for use where no PW dynamic control plane exits, known as
static PWs, or where a Terminating Provider Edge (T-PE) needs to send
a PW status message directly to a far-end T-PE. The mechanism allows
PW Operations, Administration, and Maintenance (OAM) message mapping
and PW redundancy to operate on static PWs. This document also
updates RFC 5885 in the case when Bi-directional Forwarding Detection
(BFD) is used to convey PW status-signaling information.
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/rfc6478.
Martini, et al. Standards Track [Page 1]
RFC 6478 Pseudowire Status for Static Pseudowires May 2012
Copyright Notice
Copyright (c) 2011 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
(http://trustee.ietf.org/license-info) in effect on the date of
publication of this document. Please review these documents
carefully, as they describe your rights and restrictions with respect
to this document. Code Components extracted from this document must
include Simplified BSD License text as described in Section 4.e of
the Trust Legal Provisions and are provided without warranty as
described in the Simplified BSD License.
Table of Contents
1. Introduction ....................................................3
2. Specification of Requirements ...................................3
3. Terminology .....................................................3
4. Applicability ...................................................3
5. Pseudowire Status Operation .....................................4
5.1. PW OAM Message .............................................4
5.2. Sending a PW Status Message ................................5
5.3. PW OAM Status Message Transmit and Receive .................6
5.3.1. Acknowledgment of PW Status .........................7
5.4. MPLS Label Stack ...........................................7
5.4.1. Label Stack for a Message Destined to the Next PE ...8
5.4.2. Label Stack for a Message Destined to the Egress PE .8
5.5. S-PE Bypass Mode ...........................................8
5.5.1. S-PE Bypass Mode LDP Flag Bit .......................9
6. S-PE Operation .................................................10
6.1. Static PW to Another Static PW ............................10
6.2. Dynamic PW to Static PW or Vice Versa .....................10
7. Security Considerations ........................................11
8. IANA Considerations ............................................11
9. References .....................................................11
9.1. Normative References ......................................11
9.2. Informative References ....................................12
Martini, et al. Standards Track [Page 2]
RFC 6478 Pseudowire Status for Static Pseudowires May 2012
1. Introduction
The default control plane for Pseudowire (PW) technology, as defined
in [RFC4447], is based on the Label Distribution Protocol (LDP).
However, that document also describes a static provisioning mode
without a control plane. When a static PW is used, there is no
method to transmit the status of the PW or attachment circuit (AC)
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