* Owen DeLong
On Feb 27, 2011, at 4:21 AM, Randy Bush wrote:
NOC: are you running a macintosh? User: yes, how did you guess? NOC: because it is broken. get vista.
While I'm as big a fan of IPv6 as anybody, I think in a comparison of relative brokenness, Mac comes out quite favorably compared to Vista in spite of their DHCPv6 deficiencies.
Absolutely not. Mac OS X does not do proper source address selection according to RFC 3484. That makes it do things like preferring the use of link-local IPv6 addresses when connecting to global dual-stacked destinations, which of course won't work - as a result a 75 second long timeout is incurred for every single outgoing TCP connection. Versions earlier than 10.6.5, still in use by a considerable amount of users, will also prefer the use of 6to4 to IPv4, again something which is causing lots of brokenness. (Windows ICS is responsible for causing lots of OS X hosts to have 6to4 addresses in the first place, though.) OS X also has a bug that will make it interpret a router lifetime of 0 in a RA as infinite, causing more troubles when found behind IPv6 CE routers using ULAs in compliance with I-D.ietf-v6ops-ipv6-cpe-router, one example of which is the AVM FritzBox as far as I understand. See also: http://getipv6.info/index.php/Customer_problems_that_could_occur http://fud.no/ipv6/snapshot-20101221/gnuplot/noosx-t10-historic.png My guess is that about 70-80% of the users calling Randy and others to report problems on «World IPv6 Day» will be running Mac OS X. Ray: Do you know if RFC 3484 has been implemented in OS X 10.7? -- Tore Anderson Redpill Linpro AS - http://www.redpill-linpro.com/ Tel: +47 21 54 41 27