Petric Frank (12023-09-25): > a special problem. I have a debian (12) machine which has an onboard network > card. This machine acts as dhcp-server also. > > Now i want to add a usb network device. But this is not always there. It is > plugged in when needed. And it should serve the same network as the onboard > one. > > My idea was to create a bridge and attach the host network interface to it. > The problem now is how to get the usb network card attached to the bridge when > plugged in.
Hi. I used to do just that to bridge my two wlan adapters (until a reboot where the mt76x2u started to refuse to believe it was not in China and to use the 5 GHz band; I switched to stand-alone mesh access points). Here is my config: auto wlanA iface wlanA inet static address 10.0.128.1 netmask 255.255.255.0 network 10.0.128.0 broadcast 10.0.128.255 bridge_ports none post-up systemctl try-reload-or-restart isc-dhcp-server.service iface wlan0 inet manual post-up iw dev wlan0 set 4addr on || true post-up ip link set dev wlan0 master wlanA post-up systemctl start hostapd@wlan0.service pre-down systemctl stop hostapd@wlan0.service iface wlan1 inet manual post-up iw dev wlan1 set 4addr on || true post-up ip link set dev wlan1 master wlanA post-up systemctl start hostapd@wlan1.service pre-down systemctl stop hostapd@wlan1.service I think the lines that will be of use for you are “bridge_ports none” and “post-up ip link set dev wlan* master”. Regards, -- Nicolas George