Extensions to RSVP-TE for LSP Ingress FRR Protection
draft-ietf-teas-rsvp-ingress-protection-17

Document Type Active Internet-Draft (teas WG)
Last updated 2018-05-16 (latest revision 2018-03-18)
Replaces draft-ietf-mpls-rsvp-ingress-protection
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Intended RFC status Experimental
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Internet Engineering Task Force                             H. Chen, Ed.
Internet-Draft                                       Huawei Technologies
Intended status: Experimental                              R. Torvi, Ed.
Expires: September 19, 2018                             Juniper Networks
                                                          March 18, 2018

          Extensions to RSVP-TE for LSP Ingress FRR Protection
             draft-ietf-teas-rsvp-ingress-protection-17.txt

Abstract

   This document describes extensions to Resource Reservation Protocol -
   Traffic Engineering (RSVP-TE) for locally protecting the ingress node
   of a Point-to-Point (P2P) or Point-to-Multipoint (P2MP) Traffic
   Engineered (TE) Label Switched Path (LSP).  It extends the fast-
   reroute (FRR) protection for transit nodes of an LSP to the ingress
   node of the LSP.  The procedures described in this document are
   experimental.

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Chen & Torvi           Expires September 19, 2018               [Page 1]
Internet-Draft           LSP Ingress Protection               March 2018

   include Simplified BSD License text as described in Section 4.e of
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   described in the Simplified BSD License.

Table of Contents

   1.  Introduction . . . . . . . . . . . . . . . . . . . . . . . . .  3
     1.1.  Ingress Local Protection Example . . . . . . . . . . . . .  4
     1.2.  Ingress Local Protection Overview  . . . . . . . . . . . .  5
   2.  Ingress Failure Detection  . . . . . . . . . . . . . . . . . .  6
     2.1.  Source Detects Failure . . . . . . . . . . . . . . . . . .  6
     2.2.  Backup and Source Detect Failure . . . . . . . . . . . . .  7
   3.  Backup Forwarding State  . . . . . . . . . . . . . . . . . . .  7
     3.1.  Forwarding State for Backup LSP  . . . . . . . . . . . . .  8
   4.  Protocol Extensions  . . . . . . . . . . . . . . . . . . . . .  8
     4.1.  INGRESS_PROTECTION Object  . . . . . . . . . . . . . . . .  8
       4.1.1.  Class Number and Class Type  . . . . . . . . . . . . .  9
       4.1.2.  Object Format  . . . . . . . . . . . . . . . . . . . .  9
       4.1.3.  Subobject: Backup Ingress IPv4 Address . . . . . . . . 10
       4.1.4.  Subobject: Backup Ingress IPv6 Address . . . . . . . . 11
       4.1.5.  Subobject: Ingress IPv4 Address  . . . . . . . . . . . 11
       4.1.6.  Subobject: Ingress IPv6 Address  . . . . . . . . . . . 12
       4.1.7.  Subobject: Traffic Descriptor  . . . . . . . . . . . . 12
       4.1.8.  Subobject: Label-Routes  . . . . . . . . . . . . . . . 13
   5.  Behavior of Ingress Protection . . . . . . . . . . . . . . . . 13
     5.1.  Overview . . . . . . . . . . . . . . . . . . . . . . . . . 13
       5.1.1.  Relay-Message Method . . . . . . . . . . . . . . . . . 13
       5.1.2.  Proxy-Ingress Method . . . . . . . . . . . . . . . . . 14
     5.2.  Ingress Behavior . . . . . . . . . . . . . . . . . . . . . 15
       5.2.1.  Relay-Message Method . . . . . . . . . . . . . . . . . 16
       5.2.2.  Proxy-Ingress Method . . . . . . . . . . . . . . . . . 16
     5.3.  Backup Ingress Behavior  . . . . . . . . . . . . . . . . . 18
       5.3.1.  Backup Ingress Behavior in Off-path Case . . . . . . . 18
       5.3.2.  Backup Ingress Behavior in On-path Case  . . . . . . . 20
       5.3.3.  Failure Detection and Refresh PATH Messages  . . . . . 21
     5.4.  Revertive Behavior . . . . . . . . . . . . . . . . . . . . 21
       5.4.1.  Revert to Primary Ingress  . . . . . . . . . . . . . . 22
       5.4.2.  Global Repair by Backup Ingress  . . . . . . . . . . . 22
   6.  Security Considerations  . . . . . . . . . . . . . . . . . . . 22
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