CCAMP Working Group
Internet Draft
                                                           Zafar Ali
                                               Jean-Philippe Vasseur
                                                         Anca Zamfir
                                                 Cisco Systems, Inc.
                                                     Jonathan Newton
                                                  Cable and Wireless

Category: Informational
Expires: April 27, 2009                             October 28, 2008



           draft-ietf-ccamp-mpls-graceful-shutdown-07.txt

           Graceful Shutdown in MPLS and Generalized MPLS
                    Traffic Engineering Networks


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   Copyright (C) The IETF Trust (2008).




                          Expires April 2009               [Page 1]

      draft-ietf-ccamp-mpls-graceful-shutdown-07.txt     October 07


   Abstract

   MPLS-TE Graceful Shutdown is a method for explicitly notifying
   the nodes in a Traffic Engineering (TE) enabled network that the
   TE capability on a link or on an entire Label Switching Router
   (LSR) is going to be disabled. MPLS-TE graceful shutdown
   mechanisms are tailored toward addressing planned outage in the
   network.

   This document provides requirements and protocol mechanisms to
   reduce/eliminate traffic disruption in the event of a planned
   shutdown of a network resource. These operations are equally
   applicable to both MPLS and its Generalized MPLS (GMPLS)
   extensions.

Table of Contents

1. Introduction....................................................2
2. Terminology.....................................................3
3. Requirements for Graceful Shutdown..............................4
4. Mechanisms for Graceful Shutdown................................5
 4.1 OSPF/ ISIS Mechanisms for graceful shutdown..................5
 4.2 RSVP-TE Signaling Mechanisms for graceful shutdown...........6
5. Security Considerations.........................................