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TURN Server Auto Discovery draft-patil-tram-turn-serv-disc-00

TURN Server Auto Discovery draft-patil-tram-turn-serv-disc-00. Prashanth Patil , Tiru Reddy, Dan Wing IETF-89, London v3. Discovery Procedure. Local Configuration Service Resolution Operated by enterprise, access ISP, or ITSP Anycast Operated by enterprise, access ISP

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TURN Server Auto Discovery draft-patil-tram-turn-serv-disc-00

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  1. TURN Server Auto Discoverydraft-patil-tram-turn-serv-disc-00 PrashanthPatil, Tiru Reddy, Dan Wing IETF-89, London v3 TURN Server Auto Discovery - IETF89

  2. Discovery Procedure • Local Configuration • Service Resolution • Operated by enterprise, access ISP, or ITSP • Anycast • Operated by enterprise, access ISP Discovery procedure is performed on each interface and each address family TURN Server Auto Discovery - IETF89

  3. Discovery: Local Configuration • Configuration within application TURN Server Auto Discovery - IETF89

  4. Discovery: Service Resolution • Obtain Domain Name via DHCP • ISP/Enterprise: LIS Option (RFC5986) (in our draft) • ISP/Enterprise: Domain Search Option (RFC3397) • ITSP: Extract from own SIP/XMPP/email identity • E.g., dwing@example.com • Look up S-NAPTR TURN service • IN NAPTR 100 10 "" RELAY:turn.udp "" example.net. Derived from ALTO Server discovery, draft-ietf-alto-server-discovery TURN Server Auto Discovery - IETF89

  5. Discovery: Anycast • Send TURN allocate request to IANA-assigned TURN anycast address. • A concern: that address is far away • Yes; TURN is least-preferred candidate • Yes; related to choosing best TURN server TURN Server Auto Discovery - IETF89

  6. Other considerations • WPAD • Defacto standard TURN Server Auto Discovery - IETF89

  7. Multiple TURN Servers • Let’s pretend ISP, ITSP, and configuration all point at different TURN servers • How to choose “best” one? • better user experience (e.g., reduced latency) • reduce backhaul cost for ISP • Shortest path != “best” path • Seems a separate problem? TURN Server Auto Discovery - IETF89

  8. TURN Server Auto Discoverydraft-patil-tram-turn-serv-disc-00Next Steps? TURN Server Auto Discovery - IETF89

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