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? Not immediately, but check the output of the 'ip' tools. ifconfig and route are deprecated: ip route show ip addr show Finally, see if there's any incoming traffic on the tagged interface: tcpdump -n -i eth0.20 ... while you ping the assigned address.