draft-ietf-ccamp-mpls-graceful-shutdown-09.txt   draft-ietf-ccamp-mpls-graceful-shutdown-10.txt 
CCAMP Working Group CCAMP Working Group
Internet Draft Internet Draft
Zafar Ali Category: Informational Zafar Ali
Jean-Philippe Vasseur Expires: September 08, 2009 Jean-Philippe Vasseur
Anca Zamfir Anca Zamfir
Cisco Systems, Inc. Cisco Systems, Inc.
Jonathan Newton Jonathan Newton
Cable and Wireless Cable and Wireless
March 09, 2009
Category: Informational
Expires: September 08, 2009 March 09, 2009
draft-ietf-ccamp-mpls-graceful-shutdown-09.txt
Graceful Shutdown in MPLS and Generalized MPLS Graceful Shutdown in MPLS and Generalized MPLS
Traffic Engineering Networks Traffic Engineering Networks
draft-ietf-ccamp-mpls-graceful-shutdown-10.txt
Status of this Memo Status of this Memo
This Internet-Draft is submitted to IETF in full conformance with This Internet-Draft is submitted to IETF in full conformance with
the provisions of BCP 78 and BCP 79. This document may contain the provisions of BCP 78 and BCP 79. This document may contain
material from IETF Documents or IETF Contributions published or material from IETF Documents or IETF Contributions published or
made publicly available before November 10, 2008. The person(s) made publicly available before November 10, 2008. The person(s)
controlling the copyright in some of this material may not have controlling the copyright in some of this material may not have
granted the IETF Trust the right to allow modifications of such granted the IETF Trust the right to allow modifications of such
material outside the IETF Standards Process. Without obtaining material outside the IETF Standards Process. Without obtaining
an adequate license from the person(s) controlling the copyright an adequate license from the person(s) controlling the copyright
skipping to change at page 6, line 46 skipping to change at page 6, line 46
error codes and error values of "Notify/Local link maintenance error codes and error values of "Notify/Local link maintenance
required". The rest of the ERROR_SPEC object is constructed using required". The rest of the ERROR_SPEC object is constructed using
Component Reroute Request procedure defined in [LSP-REROUTE]. Component Reroute Request procedure defined in [LSP-REROUTE].
If graceful shutdown of a label resource is desired, the node If graceful shutdown of a label resource is desired, the node
initiating this action triggers a PathErr message with the error initiating this action triggers a PathErr message with the error
codes and error values of "Notify/Local link maintenance codes and error values of "Notify/Local link maintenance
required". The rest of the ERROR_SPEC object is constructed using required". The rest of the ERROR_SPEC object is constructed using
Label Reroute Request procedure defined in [LSP-REROUTE]. Label Reroute Request procedure defined in [LSP-REROUTE].
When a head-end node, or a transit node (including border node) When a head-end node, a transit node or a border node receive a
receives a PathErr message with error codes and error values of PathErr message with error codes and error values of "Notify/Local
"Notify/Local link maintenance required" or "Notify/ Local node link maintenance required" or "Notify/ Local node maintenance
maintenance required", it follows the make-before-break procedure required", it follows the procedures defined in [LSP-REROUTE] to
defined in [LSP-REROUTE] to reroute the traffic around the reroute the traffic around the resource being gracefully shutdown.
resource being gracefully shutdown. When performing path When performing path computation for the new LSP, the head-end node,
computation for the new LSP, the head-end node, or border node or border node avoids using the TE resources identified by the
avoids using the TE resources identified by the ERROR_SPEC ERROR_SPEC object. If PCE is used for path computation, head-end
object. If PCE is used for path computation, head-end node or node or border node acts as PCC to request the PCE via PCEP for path
border node acts as PCC to request the PCE via PCEP for path
computation avoiding resource being gracefully shutdown. The computation avoiding resource being gracefully shutdown. The
amount of time the head-end node, or border node avoid using the amount of time the head-end node, or border node avoid using the
TE resources identified by the IP address contained in the TE resources identified by the IP address contained in the
PathErr is based on a local decision at head-end node or border PathErr is based on a local decision at head-end node or border
node. node.
If node initiating the graceful shutdown procedure received path If node initiating the graceful shutdown procedure received path
setup request for a new tunnel using resource being gracefully setup request for a new tunnel using resource being gracefully
shutdown, it sends a Path Error message with "Notify" error code shutdown, it sends a Path Error message with "Notify" error code
in the ERROR SPEC object and an error value consistent with the in the ERROR SPEC object and an error value consistent with the
 End of changes. 4 change blocks. 
17 lines changed or deleted 14 lines changed or added

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