Seamless BFD for VCCV
draft-ietf-pals-seamless-vccv-00

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Document Type Active Internet-Draft (pals WG)
Last updated 2015-08-12
Replaces draft-gp-pals-seamless-vccv
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Internet Engineering Task Force                              V. Govindan
Internet-Draft                                              C. Pignataro
Updates: 5885 (if approved)                                Cisco Systems
Intended status: Standards Track                         August 11, 2015
Expires: February 12, 2016

                         Seamless BFD for VCCV
                    draft-ietf-pals-seamless-vccv-00

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 will be extended in
   future to include definition of procedures for S-BFD over Tunnels.
   This document extends the CV values defined in RFC5885.

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   This Internet-Draft will expire on February 12, 2016.

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Govindan & Pignataro    Expires February 12, 2016               [Page 1]
Internet-Draft            Seamless BFD for VCCV              August 2015

   the Trust Legal Provisions and are provided without warranty as
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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 . . . . . . . . . . . . . .   4
         2.2.2.1.  S-BFD Reflector Demultiplexing  . . . . . . . . .   5
         2.2.2.2.  S-BFD Reflector transmission of control packets .   5
         2.2.2.3.  S-BFD Reflector advertisement of target
                   discriminators using LDP  . . . . . . . . . . . .   5
         2.2.2.4.  S-BFD Reflector advertisement of target
                   discriminators using L2TP . . . . . . . . . . . .   5
         2.2.2.5.  Provisioning of S-BFD Reflector target
                   discriminators  . . . . . . . . . . . . . . . . .   5
         2.2.2.6.  Probing of S-BFD Reflector target discriminators
                   using alert discriminators  . . . . . . . . . . .   5
     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 PW demultiplexer-agnostic, and hence
   applicable for both MPLS and Layer Two Tunneling Protocol version 3
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