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SIP Routing Operations, Policy, and Request-URI Discussion

SIP Routing Operations, Policy, and Request-URI Discussion. Status, Requirements and Proposal. Sean Olson Robert Sparks seancolson@yahoo.com rsparks@dynamicsoft.com. Problem Statement. How do we modify Route processing to allow for loose routing to a SIP element. Requirements.

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SIP Routing Operations, Policy, and Request-URI Discussion

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  1. SIP Routing Operations, Policy, and Request-URI Discussion Status, Requirements and Proposal Sean Olson Robert Sparks seancolson@yahoo.com rsparks@dynamicsoft.com

  2. Problem Statement • How do we modify Route processing to allow for loose routing to a SIP element

  3. Requirements • Loose routing • Allow flexible Request-URI rewriting policy • Handle inbound and outbound proxies • Handle “visited” and “home” proxies • Allow for routes not strictly constructed with Record-Route (pre-loaded routes) • Should be backwards compatible • Should work for SIP ALG devices • See also draft-bjorkner-sip-serviceroute-00 and draft-garcia-sipping-3gpp-reqs-02

  4. Proposal • Relax Route processing rules to allow loose routing in a backwards compatible way • Request-URI rewriting and topmost Route removal become local policy decisions • Route header value is removed when reached • Request-URI and topmost route value will differ in some way

  5. Proposal • Solves Outbound/Inbound proxy issues • Leaves Record-Route as is • Discussion of meaning of port/transport in R/RR will be a separate thread.

  6. GOAL • Reach consensus by 12/28 (2 weeks)

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