CARP IP getting into DAD issues on one node
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?
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)?