Seamless Bidirectional Forwarding Detection (S-BFD) for Virtual Circuit Connectivity Verification (VCCV)
RFC 7885
| Document | Type |
RFC - Proposed Standard
(July 2016; No errata)
Updates RFC 5885
|
|
|---|---|---|---|
| Last updated | 2018-12-20 | ||
| Replaces | draft-gp-pals-seamless-vccv | ||
| Stream | IETF | ||
| Formats | plain text pdf htmlized bibtex | ||
| Reviews | |||
| Stream | WG state | Submitted to IESG for Publication | |
| Document shepherd | Andrew Malis | ||
| Shepherd write-up | Show (last changed 2016-03-16) | ||
| IESG | IESG state | RFC 7885 (Proposed Standard) | |
| Consensus Boilerplate | Yes | ||
| Telechat date | |||
| Responsible AD | Deborah Brungard | ||
| Send notices to | "Andrew G. Malis" <agmalis@gmail.com> | ||
| IANA | IANA review state | IANA OK - Actions Needed | |
| IANA action state | RFC-Ed-Ack | ||
Internet Engineering Task Force (IETF) V. Govindan
Request for Comments: 7885 C. Pignataro
Updates: 5885 Cisco
Category: Standards Track July 2016
ISSN: 2070-1721
Seamless Bidirectional Forwarding Detection (S-BFD)
for Virtual Circuit Connectivity Verification (VCCV)
Abstract
This document defines Seamless BFD (S-BFD) for VCCV by extending the
procedures and Connectivity Verification (CV) types already defined
for Bidirectional Forwarding Detection (BFD) for Virtual Circuit
Connectivity Verification (VCCV).
This document updates RFC 5885 by extending the CV Type values and
the capability selection.
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/rfc7885.
Copyright Notice
Copyright (c) 2016 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.
Govindan & Pignataro Standards Track [Page 1]
RFC 7885 Seamless BFD for VCCV July 2016
Table of Contents
1. Background ......................................................3
2. S-BFD Connectivity Verification .................................3
2.1. Co-existence of S-BFD and BFD Capabilities .................4
2.2. S-BFD CV Operation .........................................4
2.2.1. S-BFD Initiator Operation ...........................4
2.2.2. S-BFD Reflector Operation ...........................5
2.2.2.1. Demultiplexing .............................5
2.2.2.2. Transmission of Control Packets ............5
2.2.2.3. Advertisement of Target
Discriminators Using LDP ...................5
2.2.2.4. Advertisement of Target
Discriminators Using L2TP ..................6
2.2.2.5. Provisioning of Target Discriminators ......6
2.3. S-BFD Encapsulation ........................................6
3. Capability Selection ............................................7
4. Security Considerations .........................................7
5. IANA Considerations .............................................8
5.1. MPLS CV Types for the VCCV Interface Parameters Sub-TLV ....8
5.2. L2TPv3 CV Types for the VCCV Capability AVP ................8
5.3. PW Associated Channel Type .................................9
6. References ......................................................9
6.1. Normative References .......................................9
6.2. Informative References ....................................10
Acknowledgements ..................................................11
Contributors ......................................................11
Authors' Addresses ................................................11
Govindan & Pignataro Standards Track [Page 2]
RFC 7885 Seamless BFD for VCCV July 2016
1. Background
Bidirectional Forwarding Detection (BFD) for Virtual Circuit
Connectivity Verification (VCCV) [RFC5885] defines the CV Types for
BFD using VCCV, protocol operation, and the required packet
encapsulation formats. This document extends those procedures and
CV Type values to enable Seamless BFD (S-BFD) [RFC7880] operation
for VCCV.
The new S-BFD CV Types are Pseudowire (PW) demultiplexer agnostic and
hence are applicable for both MPLS and Layer Two Tunneling Protocol
version 3 (L2TPv3) PW demultiplexers. This document concerns itself
with the S-BFD VCCV operation over Single-Segment PWs (SS-PWs). The
scope of this document is as follows:
o This specification describes procedures for S-BFD asynchronous
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