table=2, priority=0,dl_dst=00:00:00:00:00:00/01:00:00:00:00:00 actions=resubmit(,20) 单播包，转 20

table=2, priority=0,dl_dst=01:00:00:00:00:00/01:00:00:00:00:00 actions=resubmit(,22) 组播（包括广播）包，转 22

table=10, priority=1 actions=learn(table=20,hard_timeout=300,priority=1,NXM_OF_VLAN_TCI[0..11],NXM_OF_ETH_DST[]=NXM_OF_ETH_SRC[],load:0->NXM_OF_VLAN_TCI[],load:NXM_NX_TUN_ID[]->NXM_NX_TUN_ID[],output:NXM_OF_IN_PORT[]),output:patch-int
完成从 (VLAN_ID, MAC) 到 (PORT_ID, TUNNEL_ID) 的映射

• table=20，表示将学习到的流表放入Table 20
• NXM_OF_VLAN_TCI[0..11]，记录当前数据包的VLAN_ID作为match中的VLAN_ID
• NXM_OF_ETH_DST[]=NXM_OF_ETH_SRC[]，记录当前数据包的源MAC地址作为match中的目的MAC地址
• load:0->NXM_OF_VLAN_TCI[]，表示action中要去掉VLAN_ID
• load:NXM_NX_TUN_ID[]->NXM_NX_TUN_ID[]，表示action中要封装隧道，隧道ID为当前隧道ID
• output:NXM_OF_IN_PORT[]，表示action中的输出，输出端口为当前数据包的输入端口