Inconsistent behavior with wpa / devd / network interfaces

[Greg Rivers]

On Thursday, May 30, 2019 10:31:45 AM CDT Johannes Lundberg wrote:
> Hi
> 
> I have a bridge and an ethernet/wifi lagg failover like this:
> 
> # First define all cloned interfaces
> cloned_interfaces="bridge0 lagg0"
> 
> # bhyve bridge
> ifconfig_bridge0="inet 192.168.8.1/24 addm lagg0 up"
> 
> # Ethernet/WiFi failvoer
> ifconfig_em0="up"
> wlans_iwm0="wlan0"
> ifconfig_wlan0="WPA up"
> create_args_wlan0="wlanaddr xx:xx:xx:xx:xx:xx"
> ifconfig_lagg0="laggproto failover laggport em0 laggport wlan0 DHCP up"
> 
> When I move between home and work networks and plug in the network cable
> it sometimes reconfigure and sometimes (mostly) not. Looking at devd
> output from a failed occasion and I can see that it calls dhclient on
> em0 and not lagg0. But it since it works sometimes I don't know if this
> is correct or not (I would expect lagg0 and not em0 but manually running
> this command with either em0 or lagg0 doesn't do anything)...
> 
> devd log: Executing 'service dhclient quietstart $'em0''
> 
> In addition to this, I often have to run ifconfig wlan0 scan (or service
> netif restart) or to have the it reconnect to a different wifi. It
> doesn't seem to be doing any periodical scanning and reconnecting at all
> (but maybe that's a different issue).
> 
> For sometime now I usually have to run service netif restart to get
> network working after switching location, followed by adding all my VM
> tap interfaces to the bridge manually, and restarting bhyve guests
> because they lose connectivity.. It's getting a bit tiring and I would
> like to find a solution.
> 
> Do I have something weird in my setup causing this? I don't recall ever
> having this issue when not using failover lagg. Running recent 13-CURRENT.
> 
I think there's a (unknown?) problem that makes lagg(4) incompatible with 
bridge(4). I've never been unable to make a lagg interface work as a member of 
a bridge. Lacking the time to pursue it, I've resorted to NATing instead.

Also, wlan interfaces tend to break if you change their MAC address.  So in a 
lagg consisting of a wlan interface and a ethernet interface (without a 
bridge), I always set the MAC of the ethernet to match the native MAC of the 
wlan, and not vice versa.

-- 
Greg