nanog mailing list archives
Re: IPv6 Multi-homing (was IPv6 /64 links)
From: Cameron Byrne <cb.list6 () gmail com>
Date: Mon, 25 Jun 2012 19:22:33 -0700
On Jun 25, 2012 6:38 PM, "William Herrin" <bill () herrin us> wrote:
On Mon, Jun 25, 2012 at 8:03 PM, William Herrin <bill () herrin us> wrote:Does SCTP operate on a list of IPv4 and IPv6 addresses received from the application when it asks for a connect, parallelizing its attempt to reach a live address? Or a DNS name which it resolves to find those addresses? Or does it accept only one address at a time for the initial connect, just like TCP?Hi Douglas, Another gentleman clarified for me privately: sctp_connectx() is listed as a new function in the 12/2011 standard. It accepts and uses multiple addresses during the initial connect. Good progress since the last time I looked at SCTP. I assume the SCTP API does not gracefully fall back to TCP for stream-oriented connections and UDP for datagram oriented connections, yes? So if an app author wants to use this in the real world as it exists in 2012, he'll have to juggle timeouts in order to try TCP if SCTP doesn't promptly establish. And he'll have to juggle the two APIs anywhere he does something more complex than send() and recv(). Yes?
There is some scope for this type of work.... This draft is expired, i imagine it may come back soonish http://tools.ietf.org/html/draft-wing-tsvwg-happy-eyeballs-sctp-02 now that the ipv6 variant has shipped SCTP is coming along, and it has a lot of promise. CB
Also, has there been improvement to the situation where an endpoint loses all of its IP addresses and wants to re-establish? Something like a notification to the app requesting a fresh list of addresses? Regards, Bill Herrin -- William D. Herrin ................ herrin () dirtside com bill () herrin us 3005 Crane Dr. ...................... Web: <http://bill.herrin.us/> Falls Church, VA 22042-3004
Current thread:
- Re: IPv6 /64 links (was Re: ipv6 book recommendations?), (continued)
- Re: IPv6 /64 links (was Re: ipv6 book recommendations?) Masataka Ohta (Jun 25)
- Re: IPv6 /64 links (was Re: ipv6 book recommendations?) Owen DeLong (Jun 25)
- IPv6 Multi-homing (was IPv6 /64 links) Douglas Otis (Jun 25)
- Re: IPv6 Multi-homing (was IPv6 /64 links) Christopher Morrow (Jun 25)
- Re: IPv6 Multi-homing (was IPv6 /64 links) Douglas Otis (Jun 25)
- Re: IPv6 Multi-homing (was IPv6 /64 links) Christopher Morrow (Jun 25)
- Re: IPv6 Multi-homing (was IPv6 /64 links) William Herrin (Jun 25)
- Re: IPv6 Multi-homing (was IPv6 /64 links) Douglas Otis (Jun 25)
- Re: IPv6 Multi-homing (was IPv6 /64 links) William Herrin (Jun 25)
- Re: IPv6 Multi-homing (was IPv6 /64 links) William Herrin (Jun 25)
- Re: IPv6 Multi-homing (was IPv6 /64 links) Cameron Byrne (Jun 25)
- Re: IPv6 Multi-homing (was IPv6 /64 links) Mikael Abrahamsson (Jun 25)
- Re: IPv6 Multi-homing (was IPv6 /64 links) Douglas Otis (Jun 26)
- Re: IPv6 /64 links (was Re: ipv6 book recommendations?) Owen DeLong (Jun 21)
- Re: ipv6 book recommendations? Cutler James R (Jun 06)
- Re: ipv6 book recommendations? valdis . kletnieks (Jun 06)