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This draft is a work item of the Multiprotocol Label Switching Working Group of the IETF.

	Title		: Definition of an RRO node-id subobject
	Author(s)	: J. Vasseur, et al.
	Filename	: draft-ietf-mpls-nodeid-subobject-07.txt
	Pages		: 8
	Date		: 2005-12-1
	
In the context of MPLS TE Fast Reroute, the Merge Point (MP) address is 
required at the Point of Local Repair (PLR) in order to select a backup 
tunnel intersecting a fast reroutable Traffic Engineering Label 
Switched Path (TE LSP) on a downstream Label Switching Router (LSR).  
However, existing protocol mechanisms are not sufficient to find an MP 
address in multi-domain routing networks where a domain is defined as 
an IGP area or an Autonomous System. Hence, the current MPLS Fast 
Reroute mechanism cannot be used in order to protect inter-domain TE 
LSPs from a failure of an ABR (Area Border Router) or ASBR (Autonomous 
System Border Router) respectively. This document specifies the use of 
existing Route Record Object (RRO) IPv4 and IPv6 sub-objects (with a 
new flag defined) thus defining the node-id subobject in order to solve 
this issue. The MPLS Fast reroute mechanism mentioned in this document 
refers to the "Facility backup" MPLS TE Fast Reroute method.

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