[Bug 262292] Seemingly not possible for IPv6 to function over tap devices on if_bridge

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=262292

--- Comment #3 from Jason Tubnor <jason@tubnor.net> ---
Can you try removing all inet4/6 from the bridge? This is my bridge:

vm-main: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> metric 0 mtu 1500
        ether 62:c7:77:2d:20:1b
        id 00:00:00:00:00:00 priority 32768 hellotime 2 fwddelay 15
        maxage 20 holdcnt 6 proto rstp maxaddr 2000 timeout 1200
        root id 00:00:00:00:00:00 priority 32768 ifcost 0 port 0
        member: e3a_jail1 flags=143<LEARNING,DISCOVER,AUTOEDGE,AUTOPTP>
                ifmaxaddr 0 port 20 priority 128 path cost 2000
        member: tap5 flags=143<LEARNING,DISCOVER,AUTOEDGE,AUTOPTP>
                ifmaxaddr 0 port 27 priority 128 path cost 2000000
        member: tap0 flags=143<LEARNING,DISCOVER,AUTOEDGE,AUTOPTP>
                ifmaxaddr 0 port 22 priority 128 path cost 2000000
        member: e1a_jail2 flags=143<LEARNING,DISCOVER,AUTOEDGE,AUTOPTP>
                ifmaxaddr 0 port 21 priority 128 path cost 2000
        member: e0a_jail3 flags=143<LEARNING,DISCOVER,AUTOEDGE,AUTOPTP>
                ifmaxaddr 0 port 19 priority 128 path cost 2000
        member: e2a_jail4 flags=143<LEARNING,DISCOVER,AUTOEDGE,AUTOPTP>
                ifmaxaddr 0 port 16 priority 128 path cost 2000
        member: vlan1 flags=143<LEARNING,DISCOVER,AUTOEDGE,AUTOPTP>
                ifmaxaddr 0 port 8 priority 128 path cost 2000000
        groups: bridge vm-switch viid-9f274@
        nd6 options=9<PERFORMNUD,IFDISABLED>

vlan1: flags=8943<UP,BROADCAST,RUNNING,PROMISC,SIMPLEX,MULTICAST> metric 0 mtu
1500
        options=4000001<RXCSUM,NOMAP>
        ether 00:1f:3a:aa:ff:cc
        inet 192.168.1.200 netmask 0xffffff00 broadcast 192.168.1.255
        groups: vlan
        vlan: 1 vlanproto: 802.1q vlanpcp: 0 parent interface: lagg0
        media: Ethernet autoselect
        status: active
        nd6 options=29<PERFORMNUD,IFDISABLED,AUTO_LINKLOCAL>

** NOTE: I don't have IPv6 in the host, it is all passed between guests and the
internet also attached to bridges.

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