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
|
|
---|---|---|---|
Authors | Vengada Govindan , Carlos Pignataro | ||
Last updated | 2018-12-20 | ||
Replaces | draft-gp-pals-seamless-vccv | ||
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 | Andy Malis | ||
Shepherd write-up | Show (last changed 2016-03-16) | ||
IESG | IESG state | RFC 7885 (Proposed Standard) | |
Action Holders |
(None)
|
||
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 asynchronousShow full document text