SDN控制器——POX基本使用

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POX可以说是NOX的同胞兄弟，其是使用python语言开发的，是一款快速的平台和网络原型的控制软件。

安装完后可以先体验一下

root@mininet-vm:/home/mininet/pox# ./pox.py  openflow.of_01 --address=127.0.0.1POX 0.2.0 (carp) / Copyright 2011-2013 James McCauley, et al.INFO:core:POX 0.2.0 (carp) is up.

在这里pox.py是程序的入口，openflow.of_01库用来解释后面的参数，Pox默认开启6633端口监听，

2.在address后面指定port。

root@mininet-vm:/home/mininet# ./pox/pox.py  openflow.of_01 --address=127.0.0.1 --port=6667POX 0.2.0 (carp) / Copyright 2011-2013 James McCauley, et al.INFO:core:POX 0.2.0 (carp) is up.

3.运行组件，即要用到的app

root@mininet-vm:/home/mininet/pox# ./pox.py  openflow.of_01 --address=127.0.0.1 --port=6666 pyPOX 0.2.0 (carp) / Copyright 2011-2013 James McCauley, et al.INFO:core:POX 0.2.0 (carp) is up.Ready.POX>

在上面的POX>输入提示符中可以编辑MSG或者调用组件的接口。

4.运行Minine连接Pox控制器。

root@mininet-vm:/home/mininet# mn  --controller=remote,ip=127.0.0.1,port=6666*** Creating network*** Adding controller*** Adding hosts:h1 h2 *** Adding switches:s1 *** Adding links:(h1, s1) (h2, s1) *** Configuring hostsh1 h2 *** Starting controllerc0 *** Starting 1 switchess1 ...*** Starting CLI:

root@mininet-vm:/home/mininet/pox# ./pox.py  openflow.of_01 --address=127.0.0.1 --port=6666 pyPOX 0.2.0 (carp) / Copyright 2011-2013 James McCauley, et al.INFO:core:POX 0.2.0 (carp) is up.Ready.POX> INFO:openflow.of_01:[None 1] closedINFO:openflow.of_01:[00-00-00-00-00-01 2] connected

Pox运行l2_pairs组件，该组件可以抽取packet_in中的dst_mac和src_mac，根据源端口和目的端口下发的flow entry到switch，即工作在交换机模式。

Pox端:

root@mininet-vm:/home/mininet/pox# ./pox.py  openflow.of_01 --address=127.0.0.1 --port=8888 pox.forwarding.l2_pairsPOX 0.2.0 (carp) / Copyright 2011-2013 James McCauley, et al.INFO:forwarding.l2_pairs:Pair-Learning switch running.INFO:core:POX 0.2.0 (carp) is up.INFO:openflow.of_01:[None 1] closedINFO:openflow.of_01:[00-00-00-00-00-01 2] connected

mininet端：

root@mininet-vm:/home/mininet# mn --controller=remote,ip=127.0.0.1,port=8888*** Creating network*** Adding controller*** Adding hosts:h1 h2 *** Adding switches:s1 *** Adding links:(h1, s1) (h2, s1) *** Configuring hostsh1 h2 *** Starting controllerc0 *** Starting 1 switchess1 ...*** Starting CLI:

查看下交换机的flow entry，可以发现无flow entry

mininet> dpctl dump-flows*** s1 ------------------------------------------------------------------------NXST_FLOW reply (xid=0x4):

使用h1 ping h2，发现出现了两条flow entry.

mininet> h1 ping 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=50.7 ms64 bytes from 10.0.0.2: icmp_seq=2 ttl=64 time=0.043 ms64 bytes from 10.0.0.2: icmp_seq=3 ttl=64 time=0.127 ms64 bytes from 10.0.0.2: icmp_seq=4 ttl=64 time=0.075 ms^C--- 10.0.0.2 ping statistics ---4 packets transmitted, 4 received, 0% packet loss, time 3005msrtt min/avg/max/mdev = 0.043/12.747/50.745/21.938 msmininet> dpctl dump-flows*** s1 ------------------------------------------------------------------------NXST_FLOW reply (xid=0x4): cookie=0x0, duration=453.315s, table=0, n_packets=5, n_bytes=434, idle_age=448, dl_src=8e:71:af:1f:ac:62,dl_dst=9e:c3:2e:b5:cd:4f actions=output:2 cookie=0x0, duration=453.277s, table=0, n_packets=6, n_bytes=476, idle_age=448, dl_src=9e:c3:2e:b5:cd:4f,dl_dst=8e:71:af:1f:ac:62 actions=output:1

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