This Internet-Draft is no longer active. Unofficial copies of old Internet-Drafts can be found here:
http://tools.ietf.org/id/draft-ietf-pce-path-key.
Abstract:
Multiprotocol Label Switching (MPLS) and Generalized MPLS (GMPLS) Traffic
Engineering (TE) Label Switched Paths (LSPs) may be computed by Path Computation Elements (PCEs). Where the TE
LSP crosses multiple domains, such as Autonomous Systems (ASes), the path may be computed by multiple PCEs
that cooperate, with each responsible for computing a segment of the path. However, in some cases (e.g.,
when ASes 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, thus disclosing AS-internal topology
information. This issue may be circumvented by returning a loose hop and by invoking
a new path computation from the domain boundary Label Switching Router (LSR) during
TE LSP setup as the signaling message enters the second domain, but this technique
has several issues including the problem of maintaining path diversity.
Authors:
Adrian Farrel <adrian@olddog.co.uk>
Richard Bradford <rbradfor@cisco.com>
(Note: The e-mail addresses provided for the authors of this Internet-Draft may no longer be valid)
datatracker.ietf.org