Comment that describes the use or tracks the attachment of a particular interface.
To add a description to an interface configuration, use the description interface configuration command. Use the no form of this command to remove the description.
The description command is meant solely as a comment to be put in the configuration to help you remember the use of certain interfaces. The description appears in the output of the following EXEC commands: more nvram:startup-config, show interfaces, and more system:running-config.
The following commands adds a description to serial interface 0/0.Router(config)#interface serial 0/0Router(config-if)#description 128k connected to SJ site
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