On Jun 3, 2012, at 7:38 PM, Joe Maimon <jmai...@ttec.com> wrote: > www.arin.net works and worked for years. www.facebook.com stopped June 1. > > So IPv6 fixes the fragmentation and MTU issues of IPv4 by how exactly?
It doesn't fix the fragmentation issues. It assumes working PMTU. For what it's worth, I also use a tunnel without issue to reach www.facebook.com via IPv6, with an MTU of 1476 (since it's running over a 1492 byte IPv4 PPoE tunnel...).
