[Bug 296106] [carp] [vlan] [bridge] CARP IP not responding on top of bridge

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=296106

--- Comment #4 from Evaldas Auryla <[email protected]> ---
CARP IP mask changed to 32, no change to CARP issue:

# ifconfig bridge1.3400
bridge1.3400: flags=8943<UP,BROADCAST,RUNNING,PROMISC,SIMPLEX,MULTICAST> metric
0 mtu 1496
        options=0
        ether 58:9c:fc:10:d8:fc
        inet 192.168.20.2 netmask 0xffffff00 broadcast 192.168.20.255
        inet 192.168.20.3 netmask 0xffffffff broadcast 192.168.20.3 vhid 99
        groups: vlan
        carp: MASTER vhid 99 advbase 1 advskew 0
              peer 224.0.0.18 peer6 ff02::12
        vlan: 3400 vlanproto: 802.1q vlanpcp: 0 parent interface: bridge1
        nd6 options=29<PERFORMNUD,IFDISABLED,AUTO_LINKLOCAL>

simultaneous tcpdump on bridge and vlan interfaces while running ping
192.168.20.3 from 192.168.20.1 :

# tcpdump -n -p -i bridge1
tcpdump: verbose output suppressed, use -v[v]... for full protocol decode
listening on bridge1, link-type EN10MB (Ethernet), snapshot length 262144 bytes
08:49:04.231548 IP 192.168.20.2 > 224.0.0.18: VRRPv2, Advertisement, vrid 99,
prio 0, authtype none, intvl 1s, length 36
08:49:05.243056 IP 192.168.20.2 > 224.0.0.18: VRRPv2, Advertisement, vrid 99,
prio 0, authtype none, intvl 1s, length 36
08:49:05.402873 IP 192.168.20.1 > 192.168.20.3: ICMP echo request, id 1459, seq
0, length 64
08:49:06.261547 IP 192.168.20.2 > 224.0.0.18: VRRPv2, Advertisement, vrid 99,
prio 0, authtype none, intvl 1s, length 36
08:49:06.472306 IP 192.168.20.1 > 192.168.20.3: ICMP echo request, id 1459, seq
1, length 64
08:49:07.271556 IP 192.168.20.2 > 224.0.0.18: VRRPv2, Advertisement, vrid 99,
prio 0, authtype none, intvl 1s, length 36
08:49:07.542819 IP 192.168.20.1 > 192.168.20.3: ICMP echo request, id 1459, seq
2, length 64

# tcpdump -n -p -i bridge1.3400
tcpdump: verbose output suppressed, use -v[v]... for full protocol decode
listening on bridge1.3400, link-type EN10MB (Ethernet), snapshot length 262144
bytes
08:49:05.243051 IP 192.168.20.2 > 224.0.0.18: VRRPv2, Advertisement, vrid 99,
prio 0, authtype none, intvl 1s, length 36
08:49:06.261544 IP 192.168.20.2 > 224.0.0.18: VRRPv2, Advertisement, vrid 99,
prio 0, authtype none, intvl 1s, length 36
08:49:07.271553 IP 192.168.20.2 > 224.0.0.18: VRRPv2, Advertisement, vrid 99,
prio 0, authtype none, intvl 1s, length 36
08:49:08.331564 IP 192.168.20.2 > 224.0.0.18: VRRPv2, Advertisement, vrid 99,
prio 0, authtype none, intvl 1s, length 36

you can see ping packets on bridge interface, but not on vlan.

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