Using a Generic Associated Channel Label as a Virtual Circuit Connectivity Verification Channel Indicator
RFC 7708
| Document | Type | RFC - Proposed Standard (November 2015; No errata) | |
|---|---|---|---|
| Authors | Thomas Nadeau , Luca Martini , Stewart Bryant | ||
| Last updated | 2015-11-24 | ||
| Replaces | draft-ietf-pwe3-vccv-for-gal | ||
| Stream | Internent Engineering Task Force (IETF) | ||
| Formats | plain text html pdf htmlized (tools) htmlized bibtex | ||
| Reviews | |||
| Stream | WG state | Submitted to IESG for Publication | |
| Document shepherd | Matthew Bocci | ||
| Shepherd write-up | Show (last changed 2015-08-25) | ||
| IESG | IESG state | RFC 7708 (Proposed Standard) | |
| Action Holders |
(None)
|
||
| Consensus Boilerplate | Yes | ||
| Telechat date | |||
| Responsible AD | Deborah Brungard | ||
| Send notices to | (None) | ||
| IANA | IANA review state | Version Changed - Review Needed | |
| IANA action state | RFC-Ed-Ack | ||
Internet Engineering Task Force (IETF) T. Nadeau
Request for Comments: 7708 Brocade
Category: Standards Track L. Martini
ISSN: 2070-1721 S. Bryant
Cisco Systems
November 2015
Using a Generic Associated Channel Label
as a Virtual Circuit Connectivity Verification Channel Indicator
Abstract
The Virtual Circuit Connectivity Verification (VCCV) protocol
specified in RFC 5085 provides a control channel (CC) that is
associated with a pseudowire (PW). This document specifies an
additional VCCV control channel type to be used with pseudowires that
do not use the PW Control Word and that are carried over an MPLS
network. This new VCCV CC type uses the Generic Associated Channel
Label defined in RFC 5586 to distinguish VCCV packets from packets
carrying user data. This new VCCV CC type introduces compatibility
with the method of MPLS Label Switched Path Operations,
Administration, and Maintenance (OAM) identification, particularly in
MPLS Transport Profile (MPLS-TP) networks (RFC 5921).
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/rfc7708.
Nadeau, et al. Standards Track [Page 1]
RFC 7708 GAL as a VCCV Channel November 2015
Copyright Notice
Copyright (c) 2015 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
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the Trust Legal Provisions and are provided without warranty as
described in the Simplified BSD License.
Table of Contents
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . 2
2. Requirements Language . . . . . . . . . . . . . . . . . . . . 3
3. Type 4 MPLS VCCV Control Channel Type . . . . . . . . . . . . 3
4. FAT PWs . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
5. Multi-Segment Pseudowires . . . . . . . . . . . . . . . . . . 5
6. VCCV Capability Advertisement . . . . . . . . . . . . . . . . 5
7. Manageability Considerations . . . . . . . . . . . . . . . . 6
8. Security Considerations . . . . . . . . . . . . . . . . . . . 6
9. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 7
9.1. MPLS VCCV Control Channel (CC) Type 4 . . . . . . . . . . 7
9.2. LDP Status Code . . . . . . . . . . . . . . . . . . . . . 7
10. References . . . . . . . . . . . . . . . . . . . . . . . . . 7
10.1. Normative References . . . . . . . . . . . . . . . . . . 7
10.2. Informative References . . . . . . . . . . . . . . . . . 8
Acknowledgments . . . . . . . . . . . . . . . . . . . . . . . . . 8
Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . 9
1. Introduction
The Virtual Circuit Connectivity Verification (VCCV) protocol is
specified in RFC 5085 [RFC5085]. This document specifies a new VCCV
control channel (VCCV CC) type to be used with pseudowires (PWs)
carried over an MPLS network that do not use the PW Control Word (CW)
[RFC4385]. This new VCCV CC type uses the Generic Associated Channel
Label (GAL) [RFC5586] to distinguish VCCV packets from packets
carrying user data. This new VCCV CC type provides compatibility
with the method of MPLS Label Switched Path (LSP) Operations,
Administration, and Maintenance (OAM) message identification, as used
in MPLS Transport Profile (MPLS-TP) networks [RFC5921].
Nadeau, et al. Standards Track [Page 2]
RFC 7708 GAL as a VCCV Channel November 2015
VCCV currently specifies three CC types. VCCV CC Type 1 uses the PW
Control Word (CW) to distinguish VCCV packets from packets carrying
user data. VCCV CC Types 2 and 3 require IP encapsulation for OAM
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