$ sudo mn --topo=linear,5
*** Creating network
*** Adding controller
*** Adding hosts:
h1 h2 h3 h4 h5
*** Adding switches:
s1 s2 s3 s4 s5
*** Adding links:
(h1, s1) (h2, s2) (h3, s3) (h4, s4) (h5, s5) (s2, s1) (s3, s2) (s4, s3) (s5, s4)
*** Configuring hosts
h1 h2 h3 h4 h5
*** Starting controller
c0
*** Starting 5 switches
s1 s2 s3 s4 s5 ...
*** Starting CLI:
mininet> switch stop s1 s2
mininet> pingall
*** Ping: testing ping reachability
h1 -> X X X X
h2 -> X X X X
h3 -> X X h4 h5
h4 -> X X h3 h5
h5 -> X X h3 h4
*** Results: 70% dropped (6/20 received)
mininet> switch start s1 s2
mininet> pingall
*** Ping: testing ping reachability
h1 -> h2 h3 h4 h5
h2 -> h1 h3 h4 h5
h3 -> h1 h2 h4 h5
h4 -> h1 h2 h3 h5
h5 -> h1 h2 h3 h4
*** Results: 0% dropped (20/20 received)
mininet> switch reset s1 s2
mininet> switch reset s1 s2
first argument for the switch command must be "start" or "stop"
mininet> switch stop s1 s2 s3 s4 h1
invalid switch: h1
mininet> pingall
*** Ping: testing ping reachability
h1 -> h2 h3 h4 h5
h2 -> h1 h3 h4 h5
h3 -> h1 h2 h4 h5
h4 -> h1 h2 h3 h5
h5 -> h1 h2 h3 h4
*** Results: 0% dropped (20/20 received)
mininet>