一、启动mini 为了实验方便建立一台openflow交换机、连接三台交互机，没有连接控制器的虚拟网络 $ sudo mn --topo single,3 --mac --switch ovsk --
一、启动mini
为了实验方便建立一台openflow交换机、连接三台交互机，没有连接控制器的虚拟网络
$ sudo mn --topo single,3 --mac --switch ovsk --controller remote *** Creating network*** Adding controllerUnable to contact the remote controller at 127.0.0.1:6653Unable to contact the remote controller at 127.0.0.1:6633Setting remote controller to 127.0.0.1:6653*** Adding hosts:h1 h2 h3 *** Adding switches:s1 *** Adding links:(h1, s1) (h2, s1) (h3, s1) *** Configuring hostsh1 h2 h3 *** Starting controllerc0 *** Starting 1 switchess1 ...*** Starting CLI:mininet> dpctl dump-flows*** s1 ------------------------------------------------------------------------NXST_FLOW reply (xid=0x4):mininet> dump<Host h1: h1-eth0:10.0.0.1 pid=24213> <Host h2: h2-eth0:10.0.0.2 pid=24215> <Host h3: h3-eth0:10.0.0.3 pid=24217> <OVSSwitch s1: lo:127.0.0.1,s1-eth1:None,s1-eth2:None,s1-eth3:None pid=24222> <RemoteController c0: 127.0.0.1:6653 pid=24205> mininet> linkinvalid number of args: link end1 end2 [up down]mininet> linksh1-eth0<->s1-eth1 (OK OK) h2-eth0<->s1-eth2 (OK OK) h3-eth0<->s1-eth3 (OK OK)mininet> h1 ping -c 2 h3PING 10.0.0.3 (10.0.0.3) 56(84) bytes of data.From 10.0.0.1 icmp_seq=1 Destination Host UnreachableFrom 10.0.0.1 icmp_seq=2 Destination Host Unreachable这时可以看到h1和h2是不通的
二、建立s1端口1和2的双向转发
先查看s1的监听端口
$ sudo ovs-vsctl show 2b05a0c0-015b-44cd-8ce8-d540d9f551c4 Bridge "s1" Controller "tcp:127.0.0.1:6653" Controller "ptcp:6654" fail_mode: secure Port "s1-eth2" Interface "s1-eth2" Port "s1-eth1" Interface "s1-eth1" Port "s1-eth3" Interface "s1-eth3" Port "s1" Interface "s1" type: internal ovs_version: "2.5.2"这里看出是6654
~$ dpctl add-flow tcp:127.0.0.1:6654 in_port=1,actions=output:2~$ dpctl add-flow tcp:127.0.0.1:6654 in_port=2,actions=output:1~$ dpctl dump-flows tcp:127.0.0.1:6654stats_reply (xid=0xbf1d157c): flags=none type=1(flow) cookie=0, duration_sec=18s, duration_nsec=579000000s, table_id=0, priority=32768, n_packets=0, n_bytes=0, idle_timeout=60,hard_timeout=0,in_port=1,actions=output:2 cookie=0, duration_sec=12s, duration_nsec=103000000s, table_id=0, priority=32768, n_packets=0, n_bytes=0, idle_timeout=60,hard_timeout=0,in_port=2,actions=output:1在mininet里
mininet> dpctl dump-flows*** s1 ------------------------------------------------------------------------NXST_FLOW reply (xid=0x4): cookie=0x0, duration=13.858s, table=0, n_packets=0, n_bytes=0, idle_timeout=60, idle_age=13, in_port=2 actions=output:1 cookie=0x0, duration=6.319s, table=0, n_packets=0, n_bytes=0, idle_timeout=60, idle_age=6, in_port=1 actions=output:2mininet> h1 ping -c 2 h2PING 10.0.0.2 (10.0.0.2) 56(84) bytes of data.64 bytes from 10.0.0.2: icmp_seq=1 ttl=64 time=0.338 ms64 bytes from 10.0.0.2: icmp_seq=2 ttl=64 time=0.072 ms--- 10.0.0.2 ping statistics ---2 packets transmitted, 2 received, 0% packet loss, time 1023msrtt min/avg/max/mdev = 0.072/0.205/0.338/0.133 msmininet> h1 ping -c 2 h3PING 10.0.0.3 (10.0.0.3) 56(84) bytes of data.From 10.0.0.1 icmp_seq=1 Destination Host Unreachable--- 10.0.0.3 ping statistics ---2 packets transmitted, 0 received, +1 errors, 100% packet loss, time 1015mss1-eth1和s1-eth2的转发流表已经建立了，故h1和h2能ping通，而h1和h3不行。
三、删除
~$ dpctl del-flows tcp:127.0.0.1:6654 这时h1和h2又不通了
