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Routing policy and architectures in use for SIP Peering

Routing policy and architectures in use for SIP Peering. draft-bhatia-sip-peering-00.txt Medhavi Bhatia mbhatia@nextone.com. Status as of -00 version. Basic architecture and terminology Current requirements Mailing list discussion. Terminology. Optional; One or more L5 aware access SPs.

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Routing policy and architectures in use for SIP Peering

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  1. Routing policy and architectures in use for SIP Peering draft-bhatia-sip-peering-00.txt Medhavi Bhatia mbhatia@nextone.com 65th IETF (Dallas)

  2. Status as of -00 version • Basic architecture and terminology • Current requirements • Mailing list discussion 65th IETF (Dallas)

  3. Terminology Optional; One or more L5 aware access SPs Origination Optional; One or more L5 aware SPs who broker calls between SPs Termination Access-O SP Interconnect SP (XSP) Core-T SP Core-O SP Origination’s SP Origination and Termination’s SP Access-T SP 65th IETF (Dallas)

  4. Typical Call Flow • Origination  [Access-O ] Core-O  [XSP ] Core-T  [Access-T]  Termination 65th IETF (Dallas)

  5. SP Route Policy Dependencies • All SPs before Core-O generally use origination based policy • Core-O uses origination and destination based policy • All SPs post Core-O generally use destination based policy • Call Hunting • Call Priority • Business Reasons • Cost/Profit etc • SLAs (QoS, Security, ASR etc) • Local Policy • Admission Control • Bandwidth/Capacity 65th IETF (Dallas)

  6. Federations • Destination based policy only • Combination of Border Elements (SBC/Edge Proxy) and ENUM directory • Shareable policies on ENUM • Originating and termination SPs local policies on BEs • Used for direct peering (inter-SP scenario) • Used by XSP (intra-SP scenario) 65th IETF (Dallas)

  7. Peering Architectures in use ENUM Registry Edge Proxy / SBC • Federations • GRX 65th IETF (Dallas)

  8. Issues discussed on mailing list • Access SP is optional (resolved) • XSP is optional (resolved) • SIP Trapezoid is preserved • XSP not the same as Transit SP described in Terminology draft • Mechanism in ENUM to involve the XSP? • Difference in routing/policy • if termination is an E.164 v/s URI? • SIP URI is derived from User ENUM or Infrastructure ENUM? • Carrier Selection out of scope • Is the policy to do these applications in scope? 65th IETF (Dallas)

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