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Outdated IOS but this MTU thingy probably hasn't changed.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
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