12.4(20)T or newer should support the MTU change. You still get the error message, but it does work.
Flint ------------------------- Date: Wed, 26 Aug 2009 20:40:37 +0200 From: Peter Rathlev <[email protected]> To: Justin Shore <[email protected]> Cc: "[email protected]" <[email protected]> Subject: Re: [c-nsp] cisco router 2800/3800 serie Message-ID: <[email protected]> Content-Type: text/plain On Wed, 2009-08-26 at 13:00 -0500, Justin Shore wrote: > I'm suspect that the interface MTU of the 1841 may not go above 1500. It's even worse, it doesn't seem to support MTU != 1500 at all on the built in FE interfaces. Router(config-if)#do sh ip int bri Interface IP-Address OK? Method Status Protocol FastEthernet0/0 10.251.9.5 YES NVRAM up up FastEthernet0/1 unassigned YES NVRAM administratively down down ATM0/0/0 unassigned YES NVRAM down down Router(config-if)#int fa0/0 Router(config-if)#mtu 1501 % Interface FastEthernet0/0 does not support user settable mtu. Router(config-if)#int fa0/1 Router(config-if)#mtu 1501 % Interface FastEthernet0/1 does not support user settable mtu. Router(config-if)#do sh ver | incl IOS Cisco IOS Software, 1841 Software (C1841-BROADBAND-M), Version 12.4(1a), RELEASE SOFTWARE (fc2) Router(config-if)# Outdated IOS but this MTU thingy probably hasn't changed. Regards, Peter _______________________________________________ cisco-nsp mailing list [email protected] https://puck.nether.net/mailman/listinfo/cisco-nsp archive at http://puck.nether.net/pipermail/cisco-nsp/
