A New Internet-Draft is available from the on-line Internet-Drafts directories.
Title : Protocol Extensions for Signaling
Confidential Path Segments in Multiprotocol
Label Switching Traffic Engineering.
Author(s) : R. Bradford, et al.
Filename : draft-rbradfor-ccamp-confidential-segment-00.txt
Pages :
Date : 2006-3-1
Routes for Multiprotocol Label Switching (MPLS) Label Switched Paths
(LSPs) may be computed by Path Computation Elements (PCEs). Where the
LSP crosses multiple domains such as Autonomous Systems (ASs) the
path may be computed by multiple PCEs that cooperate, with each
responsible for computing a segment of the path.
However, in some cases such as when ASs are administered by separate
Service Providers, it would break confidentiality rules for a PCE to
supply a path segment to a PCE in another domain. This issue may be
circumvented by returning a loose hop and by invoking a new path
computation from the domain boundary LSR during LSP setup as the LSP
enters the second domain, but this technique has several issues
including the problem of maintaining path diversity.
This document allows a PCE to provide a full path, but to hide the
contents of a segment of that path called the Confidential Path
Segment (CPS). The CPS may be conveyed in the PCE Communication
Protocol (PCEP) and signaled in a Resource Reservation Protocol
(RSVP) explicit route either by replacing it with a path key or by
encrypting it.
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