ITU-T Study Group 15 Update to IETF CCAMP Wesam Alanqar (Wesam.Alanqar@mail.sprint.com) ITU-T SG15 representative to IETF CCAMP and IPO

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

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://sg15opticalt:otxchange@ftp.itu.int/ tsg15opticaltransport/ COMMUNICATIONS/index.html

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

Routing Requirement and Protocol Work in ITU-T Study Group 15 – cont’d 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.

Routing Requirement and Protocol Work in ITU-T Study Group 15 – cont’d 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.

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@lucent.com) by May 27, 2003 Contribution deadline: June 2, 2003

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.

SDH & OTN Discovery Mechanism Work in ITU-T Study Group 15 – cont’d 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.

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.

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.