Iptel working group IETF 49

Agenda Agenda Bashing [Rosenberg] 5 mins Working Group Update [Rosenberg] 5 mins Service Codes [Peterson] 15 mins TRIP MIB [Walker] 15 mins Intra-Domain Architecture [Rosenberg] 15 mins CPL Authorization [Kuthan] 15 mins Working Group future directions [Rosenberg] 30 mins

WG Update CPL Specification –Draft –03 IESG last call made Nov 17 –Under AD review now –Interop testing done at last bakeoff! CPLs created by Indigo tool sent and processed by dynamicsoft interpreter TRIP Specification –WG last call issued on Draft –04 on Nov 29 –Authentication stuff removed, since HBH using IPSec seems to work fine for us for now

Intra-Domain Architecture Main Observation: –Routes amongst proxies within a domain dependent on policy –Underlying layer 3 network already provides connectivity! –Proxies within a domain thus only exist as policy units –Shortest path is not the objective

Example Network NY POP CA POP Customer Facing Proxies POLICY: to NY to CA Each backs up The other

How to achieve policy? Gateways propagate routes with specific weights –Very difficult to manage Preferred approach –Gateways simply push their routes up to load balancing proxies –Load balancing proxies select gateway based on locally programmed algorithms –Push aggregate POP reachability up towards customer access point –Customer access proxies decide when to use which POP, maybe per customer

Architectural Model Groups of proxies within a domain look like their own mini- domain Makes sense to use TRIP for intra-mini- domains What needs to change? –Additional params and attributes –Gateway capacity, codecs, local preferences, etc.

Open Issue Is “last hop” from gateway to proxies that front it a push or pull protocol? Push –Faster –Better for policy –Security model makes more sense –Ideal for point to point case Pull –Good for large fan outs –Allows gateways to be used by any type of client INV ?

WG Future Current chartered items are complete We need to shut down or re-charter What might we work on? –TRIP MIB (needed for draft) –Intra-domain architectures and protocols –Gateway registration –Service routing –CPL-NG –CPL MIB