eno1 en2分别为服务器两个物理网卡，聚合成bond0跟交换机连接。

auto lo
iface lo inet loopback

auto eno1
iface eno1 inet manual

auto eno2
iface eno2 inet manual

auto bond0
iface bond0 inet manual
        bond-slaves eno1 eno2
        bond-miimon 100
        bond-mode 802.3ad
        bond-xmit-hash-policy layer2+3
#Switch3 port 11+12

auto vmbr0
iface vmbr0 inet static
        address 192.168.8.2/24
        gateway 192.168.8.1
        bridge-ports bond0
        bridge-stp off
        bridge-fd 0