Debian 中无 IP 的桥接接口

Question

我需要在一些没有 IP 地址的不同接口上桥接 2 个 VLAN。我该怎么做？

auto eth4
    iface eth4 inet manual
    up ifconfig eth4 up
    mtu 9000

auto eth4.1320
    iface eth4.1320 inet manual
    post-up ifconfig $IFACE up
    pre-down ifconfig $IFACE down
    mtu 9000

auto eth8
    iface eth8 inet manual
    up ifconfig eth8 up
    mtu 9000

auto eth8.1320
    iface eth8.1320 inet manual
    post-up ifconfig $IFACE up
    pre-down ifconfig $IFACE down

auto br1320
    iface br1320 inet manual
    bridge_ports eth4.1320 eth8.1320
    bridge_stp on
    pre-up brctl addbr $IFACE
    up ifconfig $IFACE up
    down ifconfig $IFACE down
    post-down brctl delbr $IFACE
    bridge_maxwait 0