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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 Interior Gateway Protocol (IGP) area or an Autonomous System
(AS). Hence, the current MPLS Fast Reroute mechanism cannot be used in order to protect inter-domain
TE LSPs from a failure of an Area Border Router (ABR) or Autonomous System Border
Router (ASBR). This document specifies the use of existing Record Route Object
(RRO) IPv4 and IPv6 sub-objects (with a new flag defined) thus defining the node-id
sub-object 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.
Zafar Ali <firstname.lastname@example.org>
Siva Sivabalan <email@example.com>
(Note: The e-mail addresses provided for the authors of this Internet-Draft may no longer be valid)