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Cisco Bug: CSCus71290 - DHCP failover pair stuck in communication-interrupted state

Last Modified

Feb 15, 2018

Products (1)

  • Cisco Network Registrar

Known Affected Releases

8.2(2.1)

Description (partial) 

Symptom:
DHCP failover pair stuck in communication-interrupted state.

The main server repeatedly connects to the backup, but the backup disallows the connection because it has not yet finished cleaning up fully from the previous connection.

Conditions:
This only impacts 8.2 with the move from UDP to TCP for failover communication. This can occur whenever the failover connection is dropped if the server is attempting to send a new binding update at that time (small timing window).
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