tian01@tian01-virtual-machine:~$ mn
*** Mininet must run as root.
tian01@tian01-virtual-machine:~$ sudo mn
[sudo] tian01 的密码：
*** Creating network
*** Adding controller
*** Adding hosts:
h1 h2
*** Adding switches:
s1
*** Adding links:
(h1, s1) (h2, s1)
*** Configuring hosts
h1 h2
*** Starting controller
c0
*** Starting 1 switches
s1 ...
*** Starting CLI:
mininet> net
h1 h1-eth0:s1-eth1
h2 h2-eth0:s1-eth2
s1 lo: s1-eth1:h1-eth0 s1-eth2:h2-eth0
c0
mininet> link
invalid number of args: link end1 end2 [up down]
mininet> links
h1-eth0<->s1-eth1 (OK OK)
h2-eth0<->s1-eth2 (OK OK)
mininet> nodes
available nodes are:
c0 h1 h2 s1
mininet> pingall
*** Ping: testing ping reachability
h1 -> h2
h2 -> h1
*** Results: 0% dropped (2/2 received)
************************
从这里看，上面是联系内部命令
mininet> py net.addHost('h3')
<Host h3: pid=22976> pid 进程id
mininet> net
h1 h1-eth0:s1-eth1
h2 h2-eth0:s1-eth2
h3
s1 lo: s1-eth1:h1-eth0 s1-eth2:h2-eth0
c0
mininet> py net.addLink(s1,net.get('h3'))
<mininet.link.Link object at 0x7f92e9033910>
mininet> net
h1 h1-eth0:s1-eth1
h2 h2-eth0:s1-eth2
h3 h3-eth0:s1-eth3
s1 lo: s1-eth1:h1-eth0 s1-eth2:h2-eth0 s1-eth3:h3-eth0
c0
mininet> py s1.attach('s1-eth3')
mininet> pingall
*** Ping: testing ping reachability
h1 -> h2 *** Error: could not parse ping output: ping: None: 域名解析暂时失败
X
h2 -> h1 *** Error: could not parse ping output: ping: None: 域名解析暂时失败
X
h3 -> *** Error: could not parse ping output: ping: connect: 网络不可达
X *** Error: could not parse ping output: ping: connect: 网络不可达
X
*** Results: 66% dropped (2/6 received)
mininet> net
h1 h1-eth0:s1-eth1
h2 h2-eth0:s1-eth2
h3 h3-eth0:s1-eth3
s1 lo: s1-eth1:h1-eth0 s1-eth2:h2-eth0 s1-eth3:h3-eth0
c0
mininet> py net.get('h3').cmd('ifconfig h3-eth0 10.3') #配置 h3 IP地址
mininet> pingall
*** Ping: testing ping reachability
h1 -> h2 *** Error: could not parse ping output: ping: None: 域名解析暂时失败
X
h2 -> h1 *** Error: could not parse ping output: ping: None: 域名解析暂时失败
X
h3 -> h1 h2
*** Results: 33% dropped (4/6 received)
mininet> dump
<Host h1: h1-eth0:10.0.0.1 pid=22861>
<Host h2: h2-eth0:10.0.0.2 pid=22864>
<Host h3: h3-eth0:None pid=22976>
<OVSSwitch s1: lo:127.0.0.1,s1-eth1:None,s1-eth2:None,s1-eth3:None pid=22869>
<Controller c0: 127.0.0.1:6653 pid=22854>
mininet> h1 ping h3
PING 10.0.0.3 (10.0.0.3) 56(84) bytes of data.
64 bytes from 10.0.0.3: icmp_seq=1 ttl=64 time=1.83 ms
64 bytes from 10.0.0.3: icmp_seq=2 ttl=64 time=1.38 ms
......
--- 10.0.0.3 ping statistics ---
9 packets transmitted, 9 received, 0% packet loss, time 8135ms
rtt min/avg/max/mdev = 0.084/0.482/1.826/0.622 ms
mininet> h2 ping h3
PING 10.0.0.3 (10.0.0.3) 56(84) bytes of data.
64 bytes from 10.0.0.3: icmp_seq=1 ttl=64 time=3.87 ms
64 bytes from 10.0.0.3: icmp_seq=2 ttl=64 time=0.585 ms
.......
--- 10.0.0.3 ping statistics ---
2 packets transmitted, 2 received, 0% packet loss, time 1001ms
rtt min/avg/max/mdev = 0.585/2.227/3.869/1.642 ms
mininet> pingall
*** Ping: testing ping reachability
h1 -> h2 h3
h2 -> h1 h3
h3 -> h1 h2
*** Results: 0% dropped (6/6 received)
mininet> dump
<Host h1: h1-eth0:10.0.0.1 pid=22861>
<Host h2: h2-eth0:10.0.0.2 pid=22864>
<Host h3: h3-eth0:10.0.0.3 pid=22976>
<OVSSwitch s1: lo:127.0.0.1,s1-eth1:None,s1-eth2:None,s1-eth3:None pid=22869>
<Controller c0: 127.0.0.1:6653 pid=22854>
mininet> py help(h1)
mininet> py dir(s!)
invalid syntax (<string>, line 1)
mininet> py dir(s1)
省略....
mininet> py h1.setIP('10.0.0.5',24)
mininet> dump
<Host h1: h1-eth0:10.0.0.5 pid=22861>
<Host h2: h2-eth0:10.0.0.2 pid=22864>
<Host h3: h3-eth0:10.0.0.3 pid=22976>
<OVSSwitch s1: lo:127.0.0.1,s1-eth1:None,s1-eth2:None,s1-eth3:None pid=22869>
<Controller c0: 127.0.0.1:6653 pid=22854>
mininet>
最初のダンプでIPアドレスが見つからないのはなぜですか？
dumpは既存のフローテーブルを介してホストIPアドレスを取得するため、host3には現在対応するフローテーブルがないため、None
は相互にpingを実行できません。ここでは、h1 ping h3、h2 ping h3を使用して、次回フローテーブルを作成します。これを設定できます。事前にH3ipアドレス