Aha! I have finally solved this. I've no idea *why* it is happening, but it seems the order of the lines in /etc/hostname.carp119 is an issue. It seems that the inet config needs to come after the carp details. See below:
# ifconfig carp119 destroy # cat /etc/hostname.carp119 carpdev vlan119 vhid 119 pass riohperi advskew 10 inet 213.133.66.67 255.255.255.248 -inet6 # sh /etc/netstart carp119 # tcpdump -vni vlan119 proto carp tcpdump: listening on vlan119, link-type EN10MB tcpdump: WARNING: compensating for unaligned libpcap packets 20:58:15.463217 carp 213.133.66.65 > 224.0.0.18: CARPv2-advertise 36: # vhid=119 advbase=1 advskew=10 demote=0 (DF) [tos 0x10] (ttl 255, id # 22063, len 56) 20:58:16.513263 carp 213.133.66.65 > 224.0.0.18: CARPv2-advertise 36: # vhid=119 advbase=1 advskew=10 demote=0 (DF) [tos 0x10] (ttl 255, id # 52720, len 56) 20:58:17.563312 carp 213.133.66.65 > 224.0.0.18: CARPv2-advertise 36: # vhid=119 advbase=1 advskew=10 demote=0 (DF) [tos 0x10] (ttl 255, id # 19235, len 56) 20:58:18.613363 carp 213.133.66.65 > 224.0.0.18: CARPv2-advertise 36: # vhid=119 advbase=1 advskew=10 demote=0 (DF) [tos 0x10] (ttl 255, id # 41410, len 56) 20:58:19.663414 carp 213.133.66.65 > 224.0.0.18: CARPv2-advertise 36: # vhid=119 advbase=1 advskew=10 demote=0 (DF) [tos 0x10] (ttl 255, id # 57891, len 56) 20:58:20.713464 carp 213.133.66.65 > 224.0.0.18: CARPv2-advertise 36: # vhid=119 advbase=1 advskew=10 demote=0 (DF) [tos 0x10] (ttl 255, id # 32986, len 56) ^C 24 packets received by filter 0 packets dropped by kernel # mg /etc/hostname.carp119 # cat /etc/hostname.carp119 inet 213.133.66.67 255.255.255.248 carpdev vlan119 vhid 119 pass riohperi advskew 10 -inet6 # ifconfig carp119 destroy # sh /etc/netstart carp119 # tcpdump -vni vlan119 proto carp tcpdump: listening on vlan119, link-type EN10MB ^C 6 packets received by filter 0 packets dropped by kernel -Matt
