ITUT Study Group 15 Update to IETF CCAMP

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ITU-T Study Group 15 Update to IETF CCAMP

• Wesam Alanqar (Wesam.Alanqar_at_mail.sprint.com)
• ITU-T SG15 representative
• to IETF CCAMP and IPO

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Three Liaisons to IETF from ITU-T Study Group 15

• ASON Routing Activities in Q14/15
• To CCAMP WG Sub-IP Area Directors
• CC to OSPF WG, ISIS WG, Routing Area Directors
• Input on SDH and OTN Discovery Mechanisms
• To CCAMP WG Sub-IP Area Directors
• ASON Status and GMPLS Protocol Support for
  Restoration/Re-routing Capabilities
• To CCAMP WG Sub-IP Area Directors

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Location of Relevant Information

• ASON routing
• http//www.ietf.org/IESG/LIAISON/ls15-39-1.htm
• Discovery
• http//www.ietf.org/IESG/LIAISON/ls15-38.htm
• Protection re-routing
• http//www.ietf.org/IESG/LIAISON/ls15-36.htm
• http//www.ietf.org/IESG/liaison.html
• ftp//sg15opticaltotxchange_at_ftp.itu.int/tsg15opt
  icaltransport/COMMUNICATIONS/index.html

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Routing Requirement and Protocol Work in ITU-T
Study Group 15

• Q.14/15 is beginning to define connection routing
  protocols for use in ASON networks.
• Architecture and requirements for the
  Automatically switched transport network (ASON)
  have been specified in G.8080 (11/2001).
• A set of protocol-independent high level routing
  architecture and requirements has been specified
  in G.7715 (6/2002).
• ASON architecture in G.8080 has been further
  progressed (3/15/2003).
• It clarifies naming and structure of the network
  for routing and signaling. It also adds
  architectural support for discovery procedures
  and protection/restoration

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Routing Requirement and Protocol Work in ITU-T
Study Group 15 contd

• Q14/15 has initiated work on a new draft
  Recommendation (G.7715.1).
• It describes the requirements for a link-state
  method routing protocol for ASON.
• Its scope is limited to routing of transport
  connections within ASON networks, and encompasses
  inter routing control domain applications
• A template document has been created to
  facilitate comparison of candidate routing
  protocols against G.8080, G.7715, and G.7715.1.

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Routing Requirement and Protocol Work in ITU-T
Study Group 15 contd

• Q14/15 plan to specify link-state based
  protocol-specific recommendation(s) for ASON
  Routing.
• Both OSPF- and ISIS-based routing protocols are
  under consideration in Q14/15.
• Extension to the protocol(s) may be needed to
  support ASON routing requirements and
  architecture per G.8080, G.7715, and G.7715.1.

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Request to the IETF routing experts

• Invite comments and input to progress the ASON
  routing work
• Invite participation in the 9-13 June 2003 Q14/15
  Rapporteur meeting (Chicago)
• Contact H. Kam Lam (hklam_at_lucent.com) by May 27,
  2003
• Contribution deadline June 2, 2003

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SDH OTN Discovery Mechanism Work in ITU-T Study
Group 15

• Q.14/15 has consented G.7714.1, Protocol for
  Automatic Discovery in SDH and OTN Networks
• G.7714.1 includes specification on SDH Jx trace
  bytes message for Discovery.
• SG15 would like IEFT to consider the format
  proposed in G.7714.1.
• Invite IETF to define, if necessary, an
  additional format for GMPLS to use the SDH and
  OTN layer adjacency discovery process.

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SDH OTN Discovery Mechanism Work in ITU-T Study
Group 15 contd

• The information elements for the out-of-band
  discovery response message associated with the
  in-band discovery message are defined in
  G.7714.1.
• The control plane protocol specific format for
  the out-of-band response message is outside of
  the scope of G.7714.1.
• Invite IETF to propose the message format
  suitable to exchange these information elements.
• The exchange of the out-of-band message does not
  prevent any other prior GMPLS message exchange.

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ASON Status and GMPLS Protocol Support for
Restoration/Re-routing Capabilities

• SG 15 has consented the ASON signalling protocol
  Recommendations
• G.7713.1, based on the ATM PNNI signalling
  protocol
• G.7713.2, based on the GMPLS RSVP-TE signalling
  protocol
• G.7713.3, based on the GMPLS CR-LDP signalling
  protocol
• Q.14/15 would like to thank the IETF for its help
  to obtain the necessary assignment of codepoints
  for the GMPLS-based Recommendations.

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ASON Status and GMPLS Protocol Support for
Restoration/Re-routing Capabilities

• We have identified restoration/re-routing
  capabilities as a future work item.
• We are aware of the IETF protection and
  restoration Design Team activities.
• We look forward to co-operating with you in this
  area to progress this work.