There are a few options set. Try "system mtu ?"
On Mon, Feb 11, 2013 at 1:58 PM, Eric A Louie <elo...@yahoo.com> wrote: > Ok, maybe I'm missing the obvious, but within my backbone, I can't just > increase > the MTU across the Ethernet links. > > router (config-if)#ip mtu ? > <68-1500> MTU (bytes) > > Unless this is the mtu you refer to > router (config-if)#mtu ? > > <1500-9800> MTU size in bytes > Much appreciated, Eric > > > > > ________________________________ > From: Saku Ytti <s...@ytti.fi> > To: cisco-nsp@puck.nether.net > Sent: Mon, February 11, 2013 12:33:53 PM > Subject: Re: [c-nsp] ip tcp adjust-mss > > On (2013-02-11 11:56 -0800), Eric A Louie wrote: > > > Is anyone else using this method of "mtu control"? I need some support > - my > >CEO > > > > is asking why I have to do this, and who else does it, and is it a common > > practice, etc, so I'm looking for evidence, more than just "The Cisco > TAC told > > > me to do it". > > Very common hack to deal when tunneling is involved in middle of the > network, and reducing client MTU is not practical. But I'm really surprised > you'd need it in this situation, usually you can increase your core MTU to > carry MPLS labels while still delivering customers 1500B. > > Mostly while quite ugly hack, it just works. Sometimes you run into some > poor application which send MTU size UDP frames and expect them to be > delivered, those customers would not be happy. > > -- > ++ytti > _______________________________________________ > cisco-nsp mailing list cisco-nsp@puck.nether.net > https://puck.nether.net/mailman/listinfo/cisco-nsp > archive at http://puck.nether.net/pipermail/cisco-nsp/ > _______________________________________________ > cisco-nsp mailing list cisco-nsp@puck.nether.net > https://puck.nether.net/mailman/listinfo/cisco-nsp > archive at http://puck.nether.net/pipermail/cisco-nsp/ > -- Alex Presse "How much net work could a network work if a network could net work?" _______________________________________________ cisco-nsp mailing list cisco-nsp@puck.nether.net https://puck.nether.net/mailman/listinfo/cisco-nsp archive at http://puck.nether.net/pipermail/cisco-nsp/