Configure MTU

1. Enter global configuration mode.
   

   device# configure terminal

2. Enter interface configuration mode and configure a VE interface.
   

   device (config)# interface ve 5

   The range is from 1 through 4096.
3. Configure MTU on the interface.
   

   device(config-intf-ve-5)# ip mtu 9011

   The range is from 1300 through 9194. The default MTU is 1476.

   

   Note

   Only the default MTU of 1476 is supported for GRE tunnels. IP packets up to 1476 bytes can be transmitted on the GRE tunnels. As a best practice, set the MTU of the traffic source interface to 1476, so that no fragmentation is needed.

Example

This example summarizes the commands in this procedure.

device# configure terminal
device(config)# interface ve 5
device(config-intf-ve-5)# ip mtu 9011