话不多说，直接上拓扑：
我这里是用主机h1 （10.0.0.1）ping 主机h2(10.0.0.2)
v1: sudo ovs-ofctl add-flow m1-s1 in_port=1,actions=mod_vlan_vid:123,output:4 v2: sudo ovs-ofctl add-flow m1-s2 in_port=1,dl_vlan=123,action=output:2 v3: sudo ovs-ofctl add-flow m1-s3 in_port=2,dl_vlan=123,actions=strip_vlan,output:1
注意：ping是先用arp协议查看目标ip的mac地址，在发送icmp数据包，所以加标签完了去标签的时候要注意区分包类型！
V1 sudo ovs-ofctl add-flow -O OpenFlow13 m1-s1 icmp,in_port=1,actions=push_mpls:0x8847,set_field:123-\>mpls_label,output:4 sudo ovs-ofctl add-flow -O OpenFlow13 m1-s1 arp,in_port=1,actions=push_mpls:0x8847,set_field:124-\>mpls_label,output:4 V2 //改为ip协议 ，支持icmp sudo ovs-ofctl add-flow -O OpenFlow13 m1-s2 mpls,in_port=1,mpls_label=123,actions=pop_mpls:0x0800,output:2 sudo ovs-ofctl add-flow -O OpenFlow13 m1-s2 mpls,in_port=1,mpls_label=124,actions=pop_mpls:0x0806,output:2 V3 sudo ovs-ofctl add-flow m1-s3 in_port=2,actions=output:1
附加：OVS操作cmd:
查看交换机流表
sudo ovs-ofctl dump-flows br0 "in_port=1"
删除指定交换机流表
sudo ovs-ofctl del-flows m1-s2
利用OVS+FLOODLIGHT，为数据表添加VLAN_ID和MPLS
原文：https://www.cnblogs.com/gejuncheng/p/10060945.html