Le 4 mars 2010 à 03:23, Brian E Carpenter a écrit : > On 2010-03-04 15:13, WashamFan wrote: > >> Why advertise WAN side MTU to LAN side? Doesn't routers >> advertise LAN MTU via RA? PMTU would work out the optimal >> MTU for end-to-end communication. > > Because PMTUD is not reliable.
The dilemma seems to be: - either one relies on ICMPv6 packet-too-big error messages being properly forwarded and processed, - or, for IPv6 to work, hosts have to be clamped to 1280. This is IMHO a good reason to insist, again and again, that ICMPv6 PTB messages MUST be always forwarded in intermediated nodes, and always processed in their destination hosts for PMTUD to become reliable. RD _______________________________________________ Softwires mailing list [email protected] https://www.ietf.org/mailman/listinfo/softwires
