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sudo ovs-vsctl show
查看
sudo ip netns exec ns0 ping 192.168.0.101
测试 p0 和 p1 的连通性
使用命令../mininet/examples/miniedit.py
打开 miniedit 可视化工具
勾选 OpenFlow 1.3 协议
将文件通过export level2 script
保存为 .py 文件,修改代码
sudo python 005.py
执行程序,并用命令net
查看端口的连接状态
sudo ovs-ofctl -O OpenFlow13 dump-flows s1
sudo ovs-ofctl -O OpenFlow13 dump-flows s2
查看 s1, s2 流表
pingall
查看主机连通性
sudo Wireshark
打开抓包工具,捕获 s1 的 3 号端口
阅读SDNLAB实验使用Mininet,编写Python代码,生成(一)中的SDN拓扑,并在代码中直接使用OVS命令,做到可以直接运行Python程序完成和(一)相同的VLAN划分。
From mininet.net import Mininet
from mininet.node import Node
from mininet.link import Link
from mininet.LOG import setLogLevel, info
def myNet():
"Create network from scratch using Open vSwitch."
info( "*** Creating nodesn" )
switch1 = Node( 's1', innamespace=False )
switch2 = Node( 's2', inNamespace=False )
h1 = Node( 'h1' )
h2 = Node( 'h2' )
h3 = Node( 'h3' )
h4 = Node( 'h4' )
info( "*** Creating linksn" )
Link(h1, switch1, 1, 1)
Link(h2, switch1, 1, 2)
Link(h3, switch2, 1, 1)
Link(h4, switch2, 1, 2)
Link(switch1, switch2, 3, 3)
info( "*** configuring hostsn" )
h1.setIP('10.0.0.1')
h2.setIP('10.0.0.2')
h3.setIP('10.0.0.3')
h4.setIP('10.0.0.4')
info( str( h1 ) + 'n' )
info( str( h2 ) + 'n' )
info( str( h3 ) + 'n' )
info( str( h4 ) + 'n' )
info( "*** Starting network using Open vSwitchn" )
switch1.cmd( 'ovs-vsctl del-br dp1' )
switch1.cmd( 'ovs-vsctl add-br dp1' )
switch2.cmd( 'ovs-vsctl del-br dp2' )
switch2.cmd( 'ovs-vsctl add-br dp2' )
for intf in switch1.intfs.values():
PRint(intf)
print(switch1.cmd( 'ovs-vsctl add-port dp1 %s' % intf ))
for intf in switch2.intfs.values():
print(intf)
print(switch2.cmd( 'ovs-vsctl add-port dp2 %s' % intf ))
switch1.cmd(r'ovs-vsctl show')
switch1.cmd(r'ovs-ofctl -O OpenFlow13 add-flow dp1 priority=1,in_port=1,action=push_vlan:0x8100,set_field:4096->vlan_vid,output:3' )
switch1.cmd(r'ovs-ofctl -O OpenFlow13 add-flow dp1 priority=1,in_port=2,action=push_vlan:0x8100,set_field:4097->vlan_vid,output:3' )
switch1.cmd(r'ovs-ofctl -O OpenFlow13 add-flow dp1 priority=1,dl_vlan=0,action=pop_vlan,output:1' )
switch1.cmd(r'ovs-ofctl -O OpenFlow13 add-flow dp1 priority=1,dl_vlan=1,action=pop_vlan,output:2' )
switch2.cmd(r'ovs-ofctl -O OpenFlow13 add-flow dp2 priority=1,in_port=1,action=push_vlan:0x8100,set_field:4096->vlan_vid,output:3' )
switch2.cmd(r'ovs-ofctl -O OpenFlow13 add-flow dp2 priority=1,in_port=2,action=push_vlan:0x8100,set_field:4097->vlan_vid,output:3')
switch2.cmd(r'ovs-ofctl -O OpenFlow13 add-flow dp2 priority=1,dl_vlan=0,action=pop_vlan,output:1' )
switch2.cmd(r'ovs-ofctl -O OpenFlow13 add-flow dp2 priority=1,dl_vlan=1,action=pop_vlan,output:2')
info("*** Running testn")
h1.cmdPrint('ping -c 3 ' + h2.IP())
h1.cmdPrint('ping -c 3 ' + h3.IP())
h1.cmdPrint('ping -c 3 ' + h4.IP())
h2.cmdPrint('ping -c 3 ' + h1.IP())
h2.cmdPrint('ping -c 3 ' + h3.IP())
h2.cmdPrint('ping -c 3 ' + h4.IP())
info( "*** Stopping networkn" )
switch1.cmd( 'ovs-vsctl del-br dp1' )
switch1.deleteintfs()
switch2.cmd( 'ovs-vsctl del-br dp2' )
switch2.deleteIntfs()
info( 'n' )
if __name__ == '__main__':
setLogLevel( 'info' )
info( '*** Scratch network demo (kernel datapath)n' )
Mininet.init()
myNet()
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