SDN第二次作业

(一)

1.创建交换机

测试连通性:

2.搭建拓扑

3.划分VLAN

4.主机连通性

wireshark测试抓包

(二)进阶

代码如下:
更新：

#!/usr/bin/python

def myVswitch():
    "Create network from scratch using Open vSwitch."

    info("*** Creating nodes\n")
    switch1 = Node('s1', inNamespace=False)
    switch2 = Node('s2', inNamespace=False)
    h1 = Node('h1')
    h2 = Node('h2')
    h3 = Node('h3')
    h4 = Node('h4')

    info("*** Creating links\n")

    Link(h1, switch1)
    Link(h2, switch1)
    Link(h3, switch2)
    Link(h4, switch2)
    Link(switch1, switch2)

    info("*** Configuring hosts\n")
    h1.setIP('192.168.123.1/24')
    h2.setIP('192.168.123.2/24')
    h3.setIP('192.168.123.3/24')
    h4.setIP('192.168.123.4/24')
    info(str(h1) + '\n')
    info(str(h2) + '\n')
    info(str(h3) + '\n')
    info(str(h4) + '\n')

    info("*** Starting network using Open vSwitch\n")
    switch1.cmd('ovs-vsctl del-br s1')
    switch1.cmd('ovs-vsctl add-br s1')
    switch2.cmd('ovs-vsctl del-br s2')
    switch2.cmd('ovs-vsctl add-br s2')

    for intf in switch1.intfs.values():
        print(intf)
        print(switch1.cmd('ovs-vsctl add-port s1 %s' % intf))

    for intf in switch2.intfs.values():
        print(intf)
        print(switch2.cmd('ovs-vsctl add-port s2 %s' % intf))
    switch1.cmd(r'ovs-ofctl -O OpenFlow13 add-flow s1 priority=1,in_port=1,actions=push_vlan:0x8100,set_field:4096-\>vlan_vid,output:3')
    switch2.cmd(
        r'ovs-ofctl -O OpenFlow13 add-flow s2 priority=1,in_port=1,actions=push_vlan:0x8100,set_field:4096-\>vlan_vid,output:3')
    switch1.cmd(
        r'ovs-ofctl -O OpenFlow13 add-flow s1 priority=1,in_port=2,actions=push_vlan:0x8100,set_field:4097-\>vlan_vid,output:3')
    switch2.cmd(
        r'ovs-ofctl -O OpenFlow13 add-flow s2 priority=1,in_port=2,actions=push_vlan:0x8100,set_field:4097-\>vlan_vid,output:3')
    switch1.cmd(r'ovs-ofctl -O OpenFlow13 add-flow s1 priority=1,dl_vlan=0,actions=pop_vlan,output:1')
    switch2.cmd(r'ovs-ofctl -O OpenFlow13 add-flow s2 priority=1,dl_vlan=0,actions=pop_vlan,output:1')
    switch1.cmd(r'ovs-ofctl -O OpenFlow13 add-flow s1 priority=1,dl_vlan=1,actions=pop_vlan,output:2')
    switch2.cmd(r'ovs-ofctl -O OpenFlow13 add-flow s2 priority=1,dl_vlan=1,actions=pop_vlan,output:2')
    info("*** Running test\n")

    info('h1 ping h2\n')
    h1.cmdPrint('ping -Q 0x10 -c 3 ' + h2.IP())
    info('h1 ping h3\n')
    h1.cmdPrint('ping -Q 0x20 -c 3 ' + h3.IP())
    info('h1 ping h4\n')
    h1.cmdPrint('ping -Q 0x30 -c 3 ' + h4.IP())

    info('h2 ping h3\n')
    h2.cmdPrint('ping -Q 0x20 -c 3 ' + h3.IP())
    info('h2 ping h4\n')
    h2.cmdPrint('ping -Q 0x30 -c 3 '+h4.IP())
    info("*** Stopping network\n")
    switch1.cmd('ovs-vsctl del-br s1')
    switch1.deleteIntfs()
    switch2.cmd('ovs-vsctl del-br s2')
    switch2.deleteIntfs()
    info('\n')

if __name__ == '__main__':
    setLogLevel('info')
    info('*** Scratch network demo (kernel datapath)\n')
    Mininet.init()
    myVswitch()

原：

#!/usr/bin/env python

from mininet.net import Mininet
from mininet.node import Controller, RemoteController, OVSController
from mininet.node import CPULimitedHost, Host, Node
from mininet.node import OVSKernelSwitch, UserSwitch
from mininet.node import IVSSwitch
from mininet.cli import CLI
from mininet.log import setLogLevel, info
from mininet.link import TCLink, Intf
from subprocess import call
import os


def myNetwork():
    net = Mininet(topo=None,
                  build=False,
                  ipBase='10.0.0.0/8')

    info('*** Adding controller\n')
    c0 = net.addController(name='c0',
                           controller=Controller,
                           protocol='tcp',
                           port=6633)

    info('*** Add switches\n')
    s1 = net.addSwitch('s1', cls=OVSKernelSwitch)
    s2 = net.addSwitch('s2', cls=OVSKernelSwitch)
    
    info('*** Add hosts\n')
    h1 = net.addHost('h1', cls=Host, ip='10.0.0.1', defaultRoute=None)
    h2 = net.addHost('h2', cls=Host, ip='10.0.0.2', defaultRoute=None)
    h3 = net.addHost('h3', cls=Host, ip='10.0.0.3', defaultRoute=None)
    h4 = net.addHost('h4', cls=Host, ip='10.0.0.4', defaultRoute=None)

    info('*** Add links\n')
    net.addLink(h1, s1, 1, 1)
    net.addLink(h2, s1, 1, 2)
    net.addLink(h3, s2, 1, 1)
    net.addLink(h4, s2, 1, 2)
    net.addLink(s1, s2, 3, 3)

    info('*** Starting network\n')
    net.build()
    info('*** Starting controllers\n')
    for controller in net.controllers:
        controller.start()

    info('*** Starting switches\n')
    net.get('s1').start([c0])
    net.get('s2').start([c0])

    os.system(
        'ovs-ofctl -O OpenFlow13 add-flow s1 priority=1,in_port=1,actions=push_vlan:0x8100,set_field:4096-\>vlan_vid,output:3')
    os.system(
        'ovs-ofctl -O OpenFlow13 add-flow s2 priority=1,in_port=1,actions=push_vlan:0x8100,set_field:4096-\>vlan_vid,output:3')
    os.system(
        'ovs-ofctl -O OpenFlow13 add-flow s1 priority=1,in_port=2,actions=push_vlan:0x8100,set_field:4097-\>vlan_vid,output:3')
    os.system(
        'ovs-ofctl -O OpenFlow13 add-flow s2 priority=1,in_port=2,actions=push_vlan:0x8100,set_field:4097-\>vlan_vid,output:3')
    os.system('ovs-ofctl -O OpenFlow13 add-flow s1 priority=1,dl_vlan=0,actions=pop_vlan,output:1')
    os.system('ovs-ofctl -O OpenFlow13 add-flow s2 priority=1,dl_vlan=0,actions=pop_vlan,output:1')
    os.system('ovs-ofctl -O OpenFlow13 add-flow s1 priority=1,dl_vlan=1,actions=pop_vlan,output:2')
    os.system('ovs-ofctl -O OpenFlow13 add-flow s2 priority=1,dl_vlan=1,actions=pop_vlan,output:2')
    os.system('ovs-vsctl show')
    info('*** Post configure switches and hosts\n')

    CLI(net)
    net.stop()


if __name__ == '__main__':
    setLogLevel('info')
    myNetwork()

运行结果:

更新：

原：