Bridge ovs-switch Port ovs-switch Interface ovs-switch type: internal Port "enahisic2i1" Interface "enahisic2i1"
注意：進行OVS設置時很容易造成虛擬交換機與物理交換機構成二層環路（比如虛擬交換機包含兩塊網卡，而這兩塊網卡都連接到物理交換機上，就是一個環路），一旦有廣播報文，比如ARP請求，就會引發廣播風暴，使網絡癱瘓。因此，應該把虛擬交換機開啟STP支持，避免廣播風暴：
ovs−vsctl set bridge 交換機名 stp_enable=true
[root@kunpeng82 devuser]# ifconfig enahisic2i1 enahisic2i1: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500 inet 172.18.100.82 netmask 255.255.255.0 broadcast 0.0.0.0 ether 48:57:02:64:e7:ac txqueuelen 1000 (Ethernet) RX packets 12123135 bytes 1711038311 (1.5 GiB) RX errors 0 dropped 5349108 overruns 0 frame 0 TX packets 540 bytes 41452 (40.4 KiB) TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
當把物理端口添加到虛擬交換機上之后，這些物理端口上原先的IP設置將失效（IP屬於三層，而交換機工作在二層），無法與外界進行三層的互聯。解決方法是添加一個類型為internal的端口，然后設置IP和路由（本例是添加一個名為veth3的虛擬端口）：
[root@kunpeng82 devuser]# ifconfig enahisic2i1 0
[root@kunpeng82 devuser]# ifconfig enahisic2i1
enahisic2i1: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500
ether 48:57:02:64:e7:ac txqueuelen 1000 (Ethernet)
RX packets 12129000 bytes 1715085158 (1.5 GiB)
RX errors 0 dropped 5349155 overruns 0 frame 0
TX packets 540 bytes 41452 (40.4 KiB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
Bridge ovs-switch Port ovs-switch Interface ovs-switch type: internal Port "enahisic2i1" Interface "enahisic2i1"
[root@kunpeng82 devuser]# ifconfig ovs-switch 172.18.100.82/24
[root@kunpeng82 devuser]# ifconfig ovs-switch
ovs-switch: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500
inet 172.18.100.82 netmask 255.255.255.0 broadcast 172.18.100.255
inet6 fe80::4a57:2ff:fe64:e7ac prefixlen 64 scopeid 0x20<link>
ether 48:57:02:64:e7:ac txqueuelen 1000 (Ethernet)
RX packets 2381 bytes 1749631 (1.6 MiB)
RX errors 0 dropped 9871 overruns 0 frame 0
TX packets 14 bytes 1076 (1.0 KiB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0