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### Instruction:
How to configure an IPv6 address on an interface in Cisco IOS XR?
### Response:
To configure an IPv6 address on an interface, enter interface configuration mode and use the 'ipv6 address' command. RP/0/RSP0/CPU0:router#config
RP/0/RSP0/CPU0:router(config)#interface GigabitEthernet0/0/0/1
RP/0/RSP0/CPU0:router(config-if)#ipv6 address 2001:db8::1/64
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