* E.g., we have a bridge domain 100, which includes interfaces gi1/0/1 with MTU value 2000, and
gi1/0/2 with MTU value 3000 *
CE3(config)# bridge 100
CE3(config-bridge)# enable
CE3(config-bridge)# exit
CE3(config)# interface gigabitethernet 1/0/1
CE3(config-if-gi)# mtu 2000
CE3(config-if-gi)# bridge-group 100
CE3(config-if-gi)# exit
CE3(config)# interface gigabitethernet 1/0/2
CE3(config-if-gi)# mtu 3000
CE3(config-if-gi)# bridge-group 100
CE3(config-if-gi)# do com
* The MTU of the bridge domain will be 1500, since the bridge itself has a default MTU of 1500
(the default value), which has become the lowest:
MTU bridge 100 = 1500 <-- The lowest MTU value
MTU gi1/0/1 = 2000
MTU gi1/0/2 = 3000
*
CE3# sh interfaces bridge
Bridges Interfaces
---------- --------------------------------------------------------------
bridge 100 gi1/0/1-2
CE3# sh interfaces status bridge 100
Interface 'bridge 100' status information:
Description: --
Operational state: UP
Administrative state: Up
Supports broadcast: Yes
Supports multicast: Yes
MTU: 1500
MAC address: a8:f9:4b:aa:11:00
Last change: 1 minute and 46 seconds
Mode: Routerport
* Change the MTU on the bridge domain itself: *
CE3(config)# bridge 100
CE3(config-bridge)# mtu 6000
CE3(config-bridge)# do com
* The MTU of the bridge domain became 2000 bytes, because gi1/0/2 has the lowest MTU:
MTU bridge 100 = 6000
MTU gi1/0/1 = 2000 <-- The lowest MTU value
MTU gi1/0/2 = 3000
*
CE3# sh interfaces bridge
Bridges Interfaces
---------- --------------------------------------------------------------
bridge 100 gi1/0/1-2
CE3# sh interfaces status bridge 100
Interface 'bridge 100' status information:
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