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Preserving Topology Confidentiality in Inter-Domain Path Computation Using a Path-Key-Based Mechanism
RFC 5520

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Document history

Date By Action
2020-01-21
(System) Received changes through RFC Editor sync (added Verified Errata tag)
2018-12-20
(System)
Received changes through RFC Editor sync (changed abstract to 'Multiprotocol Label Switching (MPLS) and Generalized MPLS (GMPLS) Traffic Engineering (TE) Label Switched Paths (LSPs) may …
Received changes through RFC Editor sync (changed abstract to '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.

This document defines a mechanism to hide the contents of a segment of a path, called the Confidential Path Segment (CPS). The CPS may be replaced by a path-key that can be conveyed in the PCE Communication Protocol (PCEP) and signaled within in a Resource Reservation Protocol TE (RSVP-TE) explicit route object. [STANDARDS-TRACK]')
2017-05-16
(System) Changed document authors from "Adrian Farrel, Richard Bradford" to "Adrian Farrel, Richard Bradford, JP Vasseur"
2015-10-14
(System) Notify list changed from pce-chairs@ietf.org, draft-ietf-pce-path-key@ietf.org to (None)
2009-05-05
Amy Vezza State Changes to RFC Published from RFC Ed Queue by Amy Vezza
2009-05-05
Amy Vezza [Note]: 'RFC 5520' added by Amy Vezza
2009-04-28
(System) RFC published