Необходимо прозрачно пропустить 2 vLAN с 0-го на 2-й порт.

Выдержка из файла конфигурации /etc/network/interfaces :

# ClientName
auto br1
iface br1 inet static
    address 10.11.126.200
    netmask 255.255.255.0
    pre-up ip link set eth0 up
    pre-up ip link set eth2 up
    pre-up vconfig add eth0 2
    pre-up vconfig add eth2 2
    pre-up ip link set eth0.2 up
    pre-up ip link set eth2.2 up
    pre-up brctl addbr br1
    pre-up brctl addif br1 eth0.2
    pre-up brctl addif br1 eth2.2
    post-down brctl delif br1 eth0.2
    post-down brctl delif br1 eth2.2
    post-down brctl delbr br1
    post-down ip link set eth0.2 down
    post-down ip link set eth2.2 down
    post-down vconfig rem eth0.2
    post-down vconfig rem eth2.2