X-Debbugs-CC: Pieter Hollander <debian@hollander.online> > auto br0 > iface br0 inet static > address 10.10.10.1 > netmask 255.255.255.0 > bridge_ports none > bridge_stp off > bridge_fd 0 > > iface br0 inet6 static > address 2001:db8::2 > netmask 64
These stanzas are missing the "bridge_hw" entry which can be a MAC address or the name of the interface whose MAC to take. Thus your bridge ends up being connected to nothing. The NEWS.Debian file has details on why this was introduced (the kernel changed behaviour). You aren't the only one who ran into this. Regards.
