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IETF RFC 5520
[ACTIVE]

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

Metadata

Publisher
IETF
Doc Type
Standard
Pages
19
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. 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]
Publication Date
2009-04-01
Status Note
Proposed Standard
DOI
10.17487/RFC5520
Link
https://doi.org/10.17487/RFC5520
Author(s)
Richard Bradford
JP Vasseur
Adrian Farrel
Keyword(s)
Confidential Path Segment, PCEP
Latest version of IETF RFC 5520

Document Versions — IETF RFC 5520

  • ▶ IETF RFC 5520 (2009-04-01)
    THIS DOC [ACTIVE] [LATEST VERSION]

Normative Reference(s)

Bibliographic Reference(s)

  • Bradford, R., Vasseur, JP., and A. Farrel, "RSVP Extensions for Path Key Support", Work in Progress, February 2008. EXTERNAL
  • Farrel, A., "Reduced Backus-Naur Form (RBNF) A Syntax Used in Various Protocol Specifications", Work in Progress, November 2008. EXTERNAL
  • Koushik, K., and E. Stephan, "PCE Communication Protocol (PCEP) Management Information Base", Work in Progress, November 2008. EXTERNAL
  • IETF RFC 3209 [Active*]
  • IETF RFC 4105 [Active*]
  • IETF RFC 4216 [Active*]
  • IETF RFC 4655 [Active*]
  • IETF RFC 5152 [Active*]
  • IETF RFC 5298 [Active*]
  • IETF RFC 5441 [Active*]
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IETF RFC 5520, Preserving Topology Confidentiality in Inter-Domain Path Computation Using a Path-Key-Based Mechanism. Available at https://doi.org/10.17487/RFC5520
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IETF RFC 5520, Preserving Topology Confidentiality in Inter-Domain Path Computation Using a Path-Key-Based Mechanism. Available at https://doi.org/10.17487/RFC5520

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IETF RFC 5520, Preserving Topology Confidentiality in Inter-Domain Path Computation Using a Path-Key-Based Mechanism. Available at https://doi.org/10.17487/RFC5520
Snippet:
<span class="citation"><cite>IETF RFC 5520</cite>, Preserving Topology Confidentiality in Inter-Domain Path Computation Using a Path-Key-Based Mechanism. Available at <a href="https://doi.org/10.17487/RFC5520" target="_blank" rel="noopener">https://doi.org/10.17487/RFC5520</a></span>

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IETF RFC 5520, Preserving Topology Confidentiality in Inter-Domain Path Computation Using a Path-Key-Based Mechanism
doi: 10.17487/RFC5520
url: https://doi.org/10.17487/RFC5520
Snippet:
<li>
<cite id="bib-rfc5520">IETF RFC 5520</cite>, Preserving Topology Confidentiality in Inter-Domain Path Computation Using a Path-Key-Based Mechanism
<span class="doi">10.17487/RFC5520</span>
</li>

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