Re: FBSD 15 :: if_bridge help needed

On Wed, Oct 8, 2025 at 4:18 AM Lexi Winter <ivy@freebsd.org> wrote:
>
> Paul Procacci wrote in <CAFbbPuhuDtOH7t=a8EtDxHhHsqZWfLUe5vsD0XsJG6KF+HYKfQ@mail.gmail.com>:
> > Problem fixed.  I feel so ashamed.
> > While epair0b.60 was up ... epair0b wasn't.
> > A stupid stupid oversight.
> >
> > Thanks again for all the help and attention.  And sorry for the noise.
> > I owe ya'll a beer if we ever cross paths.
>
> no worries, i'm glad you fixed it and i appreciate someone actually
> testing the new bridge code in a real environment :-)

So after being up till 4am last night and making a stupid mistake like
forgetting to bring up an interface, I still feel there's something
amiss but w/ something entirely different.

Without getting into the gory details... just a simple question.

Say I have lagg0.
Say I have bridge0 w/ vlanfilter enabled.
.. and say I place the lagg into that bridge via `ifconfig bridge0
addm lagg0 tagged 1843'.

The above by itself doesn't provide access to the host because well,
there's no ip or anything assigned anywhere.
It should however provide a trunk carrying vlan 1843 to the bridge0 interface.

Alright, so what's the correct method here for getting the host
assigned an ip within that 1843 vlan.
Is it:
  a) create a lagg0.1843 interface and assign an ip
  b) create a bridge0.1843 interface and assign an ip

I'm presuming `b' as I've seen a few example here and there suggesting that.

As for testing:

192.168.35.1 -- Remote host
192.168.35.154 - Machine in question

From remote host: tcpdump -n -e -ttt -i igc1 host 192.168.35.154
00:00:01.063499 58:9c:fc:10:6f:fa > 60:be:b4:01:bf:0d, ethertype IPv4
(0x0800), length 98: 192.168.35.154 > 192.168.35.1: ICMP echo request,
id 5948, seq 8, length 64
So I'm seeing untagged packets arriving when they should be tagged.

Machine in question:
----------------------------------
root@xxx:~ # ifconfig bridge0; ifconfig bridge0.1843
bridge0: flags=1008843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST,LOWER_UP>
metric 0 mtu 1500
        options=10<VLAN_HWTAGGING>
        ether 58:9c:fc:10:6f:fa
        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
        bridge flags=1<VLANFILTER>
        member: lagg0 flags=143<LEARNING,DISCOVER,AUTOEDGE,AUTOPTP>
                port 6 priority 128 path cost 2000000 vlan protocol
802.1q tagged 1843
        groups: bridge
        nd6 options=9<PERFORMNUD,IFDISABLED>
bridge0.1843: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST>
metric 0 mtu 1496
        options=0
        ether 58:9c:fc:10:6f:fa
        inet 192.168.35.154 netmask 0xffffff00 broadcast 192.168.35.255
        groups: vlan
        vlan: 1843 vlanproto: 802.1q vlanpcp: 0 parent interface: bridge0
        nd6 options=29<PERFORMNUD,IFDISABLED,AUTO_LINKLOCAL>

Any thoughts on this?

~Paul

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