On Sat, Jul 23, 2016 at 08:46:49PM +0100, Miguel C wrote:
> Just as a note using netgraph (with jng script as a workaround) works....
> 
> Also manually creating a bridge in the domu and adding xn0 as a member
> makes this fail.... so the issue is indeed related to the bridge.
> 
> I'll open a PR later in case someone want to look into it, but I'm happy it
> works with netgraph.

I seem to be able to use xn* interfaces with bridges without problems:

xn0: flags=8943<UP,BROADCAST,RUNNING,PROMISC,SIMPLEX,MULTICAST> metric 0 mtu 
1500
        options=3<RXCSUM,TXCSUM>
        ether 00:16:3e:74:3d:76
        nd6 options=29<PERFORMNUD,IFDISABLED,AUTO_LINKLOCAL>
        media: Ethernet manual
        status: active
bridge0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> metric 0 mtu 1500
        ether 02:77:3d:4a:18:00
        inet 172.16.1.140 netmask 0xffffff00 broadcast 172.16.1.255
        nd6 options=9<PERFORMNUD,IFDISABLED>
        groups: bridge
        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: xn0 flags=143<LEARNING,DISCOVER,AUTOEDGE,AUTOPTP>
                ifmaxaddr 0 port 2 priority 128 path cost 2000000

Is this a GENERIC kernel or are you using some custom configuration/patches? 
Can you provide some more information about how to reproduce this?

Roger.
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