On Wed, 2011-12-07 at 19:09 -1000, Antonio Querubin wrote: > On Wed, 7 Dec 2011, Peter Rathlev wrote: > > If the L2TPv2 packets cannot exceed 1500 bytes then the ICMP payload > > size of an encapsulated packet cannot exceed 1430 bytes, assuming > > you're not transporting a 802.1Q frame. ... > Understood. What I don't understand is why the large pings (in this > case large is anything > 1430) will sometimes work and sometimes not. > There is no packet loss between the two routers and pmtud works > between them. They can ping each other with large packets all day. > Not so the xconnected hosts.
What Gert said. What is the distribution of forwarded/non-forwarded packets? Maybe there's a timeout on the PMTUD resettings things, and maybe the router accepts fragmenting for a short while here. It shouldn't work with an MTU larger than 1430 though. It's an error that it does. ;-) -- Peter _______________________________________________ cisco-nsp mailing list [email protected] https://puck.nether.net/mailman/listinfo/cisco-nsp archive at http://puck.nether.net/pipermail/cisco-nsp/
