Command
IP MTU
Use
This command changes the MTU of a link if required. It is mostly used for DSL or similar setups.
Syntax
Router(config-if)#ip mtu <68-1500>
Example
In this example, we will lower the MTU on R1’s Fa0/0 to 1492.
R1(config-if)#int fa0/0 R1(config-if)#do sh int fa0/0 | in MTU |