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### Instruction:
ISIS-4-INTF_INACTIVE_AF
### Response:
(Severity: 4), (Category: ROUTING), (Description: The specified event was unexpected because the address family is not active on that interface. The operation of IS-IS is not affected by this message and it may safely be ignored. The message is due to an internal programming error.), (Recommended Action: Copy the error message exactly as it appears on the console or in the system log, call your Cisco technical support representative and provide the representative with the gathered information..)
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