Seamless BFD for VCCV
draft-ietf-pals-seamless-vccv-02

The information below is for an old version of the document
Document Type Active Internet-Draft (pals WG)
Last updated 2016-04-14 (latest revision 2016-02-22)
Replaces draft-gp-pals-seamless-vccv
Stream IETF
Intended RFC status Proposed Standard
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Document shepherd Andrew Malis
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Responsible AD Deborah Brungard
Send notices to "Andrew G. Malis" <agmalis@gmail.com>
IANA IANA review state IANA OK - Actions Needed
Internet Engineering Task Force                              V. Govindan
Internet-Draft                                              C. Pignataro
Updates: 5885 (if approved)                                Cisco Systems
Intended status: Standards Track                       February 22, 2016
Expires: August 25, 2016

                         Seamless BFD for VCCV
                    draft-ietf-pals-seamless-vccv-02

Abstract

   This document extends the procedures and Connectivity Verification
   (CV) types already defined for Bidirectional Forwarding Detection
   (BFD) for Virtual Circuit Connectivity Verification (VCCV) to define
   Seamless BFD (S-BFD) for VCCV.  This document updates RFC 5885,
   extending the CV Values and the Capability Selection.

Status of This Memo

   This Internet-Draft is submitted in full conformance with the
   provisions of BCP 78 and BCP 79.

   Internet-Drafts are working documents of the Internet Engineering
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   material or to cite them other than as "work in progress."

   This Internet-Draft will expire on August 25, 2016.

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
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   include Simplified BSD License text as described in Section 4.e 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.  Background  . . . . . . . . . . . . . . . . . . . . . . . . .   2
     1.1.  Requirements Language . . . . . . . . . . . . . . . . . .   3
   2.  S-BFD Connectivity Verification . . . . . . . . . . . . . . .   3
     2.1.  Co-existence of S-BFD and BFD capabilites . . . . . . . .   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   5
         2.2.2.5.  Provisioning of Target Discriminators . . . . . .   6
     2.3.  S-BFD Encapsulation . . . . . . . . . . . . . . . . . . .   6
     2.4.  S-BFD CV Types  . . . . . . . . . . . . . . . . . . . . .   6
   3.  Capability Selection  . . . . . . . . . . . . . . . . . . . .   6
   4.  Security Considerations . . . . . . . . . . . . . . . . . . .   7
   5.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .   7
     5.1.  MPLS CV Types for the VCCV Interface Parameters Sub-TLV .   7
     5.2.  L2TPv3 CV Types for the VCCV Capability AVP . . . . . . .   8
     5.3.  PW Associated Channel Type  . . . . . . . . . . . . . . .   8
   6.  Acknowledgements  . . . . . . . . . . . . . . . . . . . . . .   9
   7.  Contributing Authors  . . . . . . . . . . . . . . . . . . . .   9
   8.  References  . . . . . . . . . . . . . . . . . . . . . . . . .   9
     8.1.  Normative References  . . . . . . . . . . . . . . . . . .   9
     8.2.  Informative References  . . . . . . . . . . . . . . . . .  10
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . .  10

1.  Background

   BFD for VCCV [RFC5885] defines the CV types for BFD using VCCV,
   protocol operation and the required packet encapsulation formats.
   This document extends those procedures, CV type values to enable
   S-BFD [I-D.ietf-bfd-seamless-base] operation for VCCV.

   The new S-BFD CV Types are Pseudowire (PW) demultiplexer-agnostic,
   and hence applicable for both MPLS and Layer Two Tunneling Protocol
   version 3 (L2TPv3) pseudowire demultiplexers.  This document concerns
   itself with the S-BFD VCCV operation over single-segment pseudowires
   (SS-PWs).  The scope of this document is as follows:

      This specification describes procedures only for S-BFD
      asynchronous mode.

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