On 06/25/2012 05:22 AM, Rafał Radecki wrote: > Do you see an error in my configuration? Why is 10.20.0.108 not available? I don't have a lot of managed switches around to do extensive testing. The closest test I can do is on 5.8 with VLAN 2 and different IPs. Based on that, everything seems like it should work. Since you're able to set up the addresses on the interface without a bridge, the likelihood of a driver problem seems fairly low. Did you ever send the output of "brctl show"? You should definitely be able to run tcpdump on eth0.20 and see any traffic on that interface. You said that you saw none when you tried to ping the Linux host from the network. What about the reverse? Do you see data go out eth0.20 when you try to ping an address in the attached subnet from the Linux host?