Configure descriptions

Adding a description to an interface on a Cisco device doesn’t provide any extra functionality, but it is useful for administrative purposes, since it will help you to remember the interface function. A description of an interface is locally significant and can be up to 240 characters long. It can be set using the description command from the interface submode:

Router(config)#interface g0/0
Router(config-if)#description WAN to London

The description is displayed in the output of the show running-config command:

!
interface GigabitEthernet0/0
 description WAN to London
 no ip address
 duplex auto
 speed auto
 shutdown
!
interface GigabitEthernet0/1
 no ip address
 duplex auto
 speed auto
 shutdown
!

To erase the description, use the no description interface mode command (or the shortcut no desc):

Router(config)#int g0/0
Router(config-if)#no desc

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