On Jul 10, 2013, at 08:49 , Ronald Bonica <rbon...@juniper.net> wrote: > [...] > Probably, the best alternative is for the tunnel ingress router to tunnel > ingress router to discover the PMTU to the egress. When the tunnel ingress > router receives a packet that is so large that it cannot be forwarded through > the tunnel, it discards the packet and sends an ICMP PTB to the packet's > originator. The packet's originator then modifies its sending behavior based > upon its new estimate of the PMTU associated with the destination. > [...]
ICMPv6 packet too big errors are unreliable on the real-world Internet. I hate to sound like a broken record, but I will: I look forward to reviewing a proposal to update to Generic Packet Tunneling in IPv6 [RFC 2473] for implementing tunnel path MTU discovery at the encapsulation layer [c.f. RFC 4821]. -- james woodyatt <j...@apple.com> core os networking -------------------------------------------------------------------- IETF IPv6 working group mailing list ipv6@ietf.org Administrative Requests: https://www.ietf.org/mailman/listinfo/ipv6 --------------------------------------------------------------------
