I-D ACTION:draft-yagyu-gmpls-shared-restoration-routing-00.txt

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	Title		: Extensions to OSPF-TE for supporting shared mesh  
                          restoration
	Author(s)	: T. Yagyu, Y. Suemura, A. Kolarov
	Filename	: draft-yagyu-gmpls-shared-restoration-routing-00.txt
	Pages		: 10
	Date		: 03-Jun-02
	
Shared mesh restoration technique efficiently uses network resources
since restoration capacity is shared across multiple independent
failures. In this scheme, when a new working LSP is established, its
corresponding backup LSP is pre-calculated and resources along the
restoration route are reserved. The resources reserved on each link
along the restoration path may be shared across different working
LSPs that are not expected to fail simultaneously. To make the method
for selection of backup LSPs more efficient in terms of utilization
of network resources, each link should provide the route calculator
with information about its restoration capacity and SRLGs of working
LSPs whose backup LSPs share the link restoration capacity. In this
document we propose extensions to OSPF-TE in support of carrying link
'Sharable Bandwidth' information.

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