CARP IP getting into DAD issues on one node

[MichelZ]

Hi

We have a 2-node-cluster of pfsense 2.2.4

On one node, for one IPv6, we get a duplicate detection, and the IPv6 VIP is down:
Aug 25 11:36:29 kernel: carp: VHID 231@vmx0_vlan1700: INIT -> BACKUP
Aug 25 11:36:29 kernel: vmx0_vlan1700: manual intervention required
Aug 25 11:36:29 kernel: vmx0_vlan1700: DAD complete for 2a02:418:300a:7::1 - duplicate found
Aug 25 11:36:29 kernel: vmx0_vlan1700: DAD detected duplicate IPv6 address 2a02:xxxx:xxxx:7::1: NS in/out=0/1, NA in=1
Aug 25 11:36:29 kernel: vmx0_vlan1700: promiscuous mode enabled

If we failover to the second node, no duplicate seems to be detected, and it works as expected.

Any ideas what to look out for?

Thanks!
Michel

[jimp]

Is that IP address only configured as a CARP VIP on both nodes?

Is the CARP VIP status correct on both (Primary shows MASTER, secondary shows BACKUP)?