1. ITU-T Study Group 15 Update to IETF CCAMP
Wesam Alanqar
ITU-T SG15 representative
to IETF CCAMP and IPO

2. 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

3. Location of Relevant Information
ASON routing:
Discovery:
Protection & re-routing:
tsg15opticaltransport/ COMMUNICATIONS/index.html

4. 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

5. Routing Requirement and Protocol Work in ITU-T Study Group 15 – cont’d
Q14/15 has initiated work on a new draft Recommendation (G ).
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

6. 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

7. 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 by May 27, 2003
Contribution deadline: June 2, 2003

8. SDH & OTN Discovery Mechanism Work in ITU-T Study Group 15
Q.14/15 has consented G , “Protocol for Automatic Discovery in SDH and OTN Networks”
G includes specification on SDH Jx trace bytes message for Discovery.
SG15 would like IEFT to consider the format proposed in G
Invite IETF to define, if necessary, an additional format for GMPLS to use the SDH and OTN layer adjacency discovery process.

9. 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
The control plane protocol specific format for the out-of-band response message is outside of the scope of G
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.

10. ASON Status and GMPLS Protocol Support for Restoration/Re-routing Capabilities
SG 15 has consented the ASON signalling protocol Recommendations:
G , based on the ATM PNNI signalling protocol
G , based on the GMPLS RSVP-TE signalling protocol
G , 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.

11. 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.