openvswitch ovs-appctl 使用

参考链接：https://www.cnblogs.com/zqyanywn/p/10501590.html

1. fdb/show bridge 列出指定桥上每个MAC直至与VLAN的对应信息，并且包含该学习到该MAC的端口号还有该条目的age信息，单位为秒

[root@ostack1 ~]# ovs-appctl fdb/show br-eth1
 port  VLAN  MAC                Age
           fa::3e:e2:af:d7
         fa::3e::d2:
           fa::3e:ef::a9
           fa::3e:0e::
         fa::3e:0a:2c:4a
         fa::3e:d6:4d:7d
         fa::3e::cf:bf
         fa::3e:7a:1c:9c
         fa::3e:ff::
         fa::3e:ec::5f
         fa::3e:2e:ff:f5
         fa::3e:f4:fb:9d
         0c:c6:cc:f9::
         fa::3e::a0:
         :::b8:dc:
         fa::3e:e2:af:d7    

2.fdb/flush [bridge]
清除指定桥的MAC学习表，没有指定桥则应用于所有桥

3.bridge/dump-flows bridge 列出桥上所有的流，包括那些在其他命令中（例如 ovs-ofctl dump-flows）默认隐藏的流.一些机制比如带内管理等设置的流策略是不行允许修改和覆盖的，所以对控制器来说他们是隐藏的。

[root@ostack1 ~]# ovs-appctl bridge/dump-flows br-eth3
duration=306s, n_packets=, n_bytes=, priority=,in_port=,actions=resubmit(,)
duration=325s, n_packets=, n_bytes=, priority=,actions=NORMAL
duration=306s, n_packets=, n_bytes=, priority=,actions=resubmit(,)
table_id=, duration=306s, n_packets=, n_bytes=, priority=,actions=resubmit(,)
table_id=, duration=305s, n_packets=, n_bytes=, priority=,in_port=,actions=drop
table_id=, duration=305s, n_packets=, n_bytes=, priority=,actions=NORMAL
table_id=, duration=10276157s, n_packets=, n_bytes=, priority=,recirc_id=,actions=drop
table_id=, duration=10276157s, n_packets=, n_bytes=, priority=,reg0=0x1,actions=controller(reason=no_match)
table_id=, duration=10276157s, n_packets=, n_bytes=, priority=,reg0=0x2,actions=drop
table_id=, duration=10276157s, n_packets=, n_bytes=, priority=,reg0=0x3,actions=drop