I've learned to configure MTU explicitly everywhere in Juniper. Too many places where they're getting it wrong. Setting vlan-tagging will usually get the right setting but interface-mode or port-mode trunk links can come up with wrong MTUs...
http://kb.juniper.net/InfoCenter/index?page=content&id=KB25421 On Mon, Mar 2, 2015 at 9:56 AM, Chuck Anderson <[email protected]> wrote: > On Mon, Mar 02, 2015 at 06:05:18PM +0100, Laurent CARON wrote: >> We clearly see a MTU mismatch (1500 vs 150*4* for inet6 on the 4200 >> side) leading to OSPF adjacencies not coming up. >> >> Setting: >> set interfaces ae26 mtu 1518 >> on the 4200 side allows to have the OSPF adjacencies up. >> >> Did you guys experience such bahavior ? >> >> 4200 are running 12.3R8.7 >> 4500 is running 12.3R7.7 > > I do not have an answer to your question, but this is one reason I > always configure family inet mtu 1500 and family inet6 mtu 1500. Then > you can set the physical mtu as high as you want to accomodate > multiple VLAN tags, MPLS, etc. without worrying. > _______________________________________________ > juniper-nsp mailing list [email protected] > https://puck.nether.net/mailman/listinfo/juniper-nsp -- "Genius might be described as a supreme capacity for getting its possessors into trouble of all kinds." -- Samuel Butler _______________________________________________ juniper-nsp mailing list [email protected] https://puck.nether.net/mailman/listinfo/juniper-nsp
