CURRENT_MEETING_REPORT_ Reported by Deborah Estrin/Information Sciences Institute Minutes of the Source Demand Routing Working Group (SDR) Tony Li started the first meeting with a walk through of the current specification to collect comments. There was minimal discussion. The specification appears stable. USC is working on their second implementation which will be available for distribution in November or December. A first prototype release was made available during the summer. The remainder of the first session was spent discussing the agenda for the second day's meeting and some future issues, in particular, the relationship between route setup and reservation setup, and acquiring information to compute SDRP routes not made available by BGP/IDRP. The second day's discussion addressed: o Construction of SDRP routes The issue of how to evolve this functionality over time and what is a useful starting point was discussed as well as the issue of what is needed longer term: query/search techniques, extract proposal for using IDRP/BGP. o Indirect provider extensions to IDRP Prior to the meeting, Yakov Rekhter proposed using SDRP to extend IDRP/BGP functionality to allow overriding of source-specific preferences. However Yakov had to attend the ROLC meeting in Braden's absence and was unable to present this in detail. o Mapping packets to SDRP routes This must be done at the first SDRP speaker using local criteria and packet information. There are questions about how to specify the criteria, policy, and how to apply it efficiently so as not to downgrade performance for SDRP and non-SDRP packets. o Open issues Design issues that are most open and in need of attention are longer term techniques for inter-domain and intra-domain SDRP route construction, managing feedback from SDRP route failures for use in route selection, and the possible use of anycast addresses. Open usage/deployment issues are about the best places to start deploying SDRP (e.g., in conjunction with upcoming real time experiments, perhaps?), use for other tunneling requirements, and the need to dispel beliefs that encapsulation can never be efficient. o Volunteers were requested to review the setup specification, finish the usage draft (Sue Hares and Peter Ford are currently responsible for this), participate in experiments (Merit and USC are currently participating), and participate in route construction design work. o A status report on the current implementation noted that the two unimplemented features were MTU discovery and policy checking by transit domains. Several of these issues were not discussed in adequate detail because of Deborah Estrin's sudden departure in response to the LA fires. We will return to them via e-mail discussions and during the March IETF. Attendees J. Noel Chiappa jnc@lcs.mit.edu Osmund deSouza osmund.desouza@att.com Deborah Estrin estrin@usc.edu Christian Huitema Christian.Huitema@sophia.inria.fr Tony Li tli@cisco.com Yakov Rekhter yakov@watson.ibm.com