On Tue, Nov 29, 2011 at 12:34 AM, Roland Dobbins <roland.dobb...@gmail.com> wrote: > > On Nov 29, 2011, at 2:50 AM, Robert Raszuk wrote: > >> I think we really need to have a way to determine PMTU in the cases of >> switch in the middle having a mismatched value. > > Shouldn't the root cause of PMTU-D breakage - i.e., overfiltering of the > requisite ICMP message types - be mentioned and appropriate ICMP filtering > recommendations be made in order to ensure PMTU-D functionality across IXP > fabrics making use of jumbo frames? >
it's not always the filtering of packet-too-big messages though, sometimes it's filtering of the packet because the source isn't valid (1918 router interfaces, to take a simple example) > Also, there's a typo - 'ICMP filtering on the customers router could impeed > this testing.' should read 'ICMP filtering on the customers router could > impede this testing.'. customer's router > _______________________________________________ > GROW mailing list > GROW@ietf.org > https://www.ietf.org/mailman/listinfo/grow > _______________________________________________ GROW mailing list GROW@ietf.org https://www.ietf.org/mailman/listinfo/grow