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### Instruction:
How to configure an interface description in IOS XR?
### Response:
To configure an interface description, which provides clarity on the interface's purpose, use the 'description' command in interface configuration mode. RP/0/RSP0/CPU0:router(config)#interface GigabitEthernet0/0/0/0
RP/0/RSP0/CPU0:router(config-if)#description 'Uplink to ISP'
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