tap devices appear not to support an mtu higher than 1500: usilap:/ # uname -r 2.6.23.12 usilap:/ # /usr/bin/tunctl -u root -t tap0 Set 'tap0' persistent and owned by uid 0 usilap:/ # ip link set tap0 mtu 1500 usilap:/ # ip link set tap0 mtu 1501 SIOCSIFMTU: Invalid argument usilap:/ # ip link set tap0 mtu 1600 SIOCSIFMTU: Invalid argument Would it be trivial to remove this limitation? Can anyone tell me where is the code that is enforcing this limitation? Is it in drivers/net/tun.c ? thanks, Eddie -- To unsubscribe from this list: send the line "unsubscribe linux-net" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html