sctp Happy Eyeballs Trending Towards Success with SCTP Dan Wing Andrew Yourtchenko dwing ayourtchciscocom 1 Happy Eyeballs SCTP IETF79 2 The Problem a reliable transport is only TCP ID: 236331
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draft-wing-tsvwg-happy-eyeballs-sctp
Happy Eyeballs:
Trending Towards Success with SCTP
Dan WingAndrew Yourtchenko{dwing, ayourtch}@cisco.com
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Happy Eyeballs SCTP - IETF79Slide2
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The Problem
“a reliable transport” is only TCPWant to allow SCTP,
without harming user experienceMiddleboxes block SCTP NATs, firewallsDNS-based mechanism can’t validate path
Happy Eyeballs SCTP - IETF79Slide3
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Proposal: Send Probes, Learn, Quick Fallback
Send Probes: Try connecting to both TCP and SCTP
Similar to ICE (RFC5245)Learn: Use the past to predict the futureAvoids constant doubling of TCP SYNs / SCTP INITs
Quick Fallback
Happy Eyeballs SCTP - IETF79Slide4
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Happy Eyeballs, Discussion
Probing: thoughts?SRV doesn’t solve same problem
Happy Eyeballs SCTP - IETF79