|  | simp destroy ".*" | 
|  | simp create -o sw1:rocker:sw1 tut tut.dot | 
|  | simp start tut | 
|  | sleep 10 | 
|  | while ! simp ssh tut sw1 --cmd "ping -c 1 localhost >/dev/null"; do sleep 1; done | 
|  | while ! simp ssh tut h1 --cmd "ping -c 1 localhost >/dev/null"; do sleep 1; done | 
|  | while ! simp ssh tut h2 --cmd "ping -c 1 localhost >/dev/null"; do sleep 1; done | 
|  |  | 
|  | # configure a 2-port bridge | 
|  |  | 
|  | simp ssh tut sw1 --cmd "sudo /sbin/ip link add name br0 type bridge" | 
|  | simp ssh tut sw1 --cmd "sudo brctl stp br0 on" | 
|  | simp ssh tut sw1 --cmd "sudo /sbin/ip link set dev sw1p1 master br0" | 
|  | simp ssh tut sw1 --cmd "sudo /sbin/ip link set dev sw1p2 master br0" | 
|  |  | 
|  | # turn off vlan default_pvid on br0 | 
|  | # turn on vlan filtering on br0 | 
|  |  | 
|  | simp ssh tut sw1 --cmd "echo 0 | sudo dd of=/sys/class/net/br0/bridge/default_pvid 2> /dev/null" | 
|  | simp ssh tut sw1 --cmd "echo 1 | sudo dd of=/sys/class/net/br0/bridge/vlan_filtering 2> /dev/null" | 
|  |  | 
|  | # add both ports to VLAN 57 | 
|  |  | 
|  | simp ssh tut sw1 --cmd "sudo /sbin/bridge vlan add vid 57 dev sw1p1" | 
|  | simp ssh tut sw1 --cmd "sudo /sbin/bridge vlan add vid 57 dev sw1p2" | 
|  |  | 
|  | # turn off learning and flooding in SW | 
|  |  | 
|  | simp ssh tut sw1 --cmd "sudo /sbin/bridge link set dev sw1p1 learning off" | 
|  | simp ssh tut sw1 --cmd "sudo /sbin/bridge link set dev sw1p2 learning off" | 
|  |  | 
|  | simp ssh tut sw1 --cmd "sudo /sbin/bridge link set dev sw1p1 flood off" | 
|  | simp ssh tut sw1 --cmd "sudo /sbin/bridge link set dev sw1p2 flood off" | 
|  |  | 
|  | # config IP on host VLANs | 
|  |  | 
|  | simp ssh tut h1 --cmd "sudo vconfig add sw1p1 57 >/dev/null 2>&1" | 
|  | simp ssh tut h1 --cmd "sudo ifconfig sw1p1 up" | 
|  | simp ssh tut h1 --cmd "sudo ifconfig sw1p1.57 11.0.0.1/24" | 
|  |  | 
|  | simp ssh tut h2 --cmd "sudo vconfig add sw1p1 57 >/dev/null 2>&1" | 
|  | simp ssh tut h2 --cmd "sudo ifconfig sw1p1 up" | 
|  | simp ssh tut h2 --cmd "sudo ifconfig sw1p1.57 11.0.0.2/24" | 
|  |  | 
|  | # bring up bridge and ports | 
|  |  | 
|  | simp ssh tut sw1 --cmd "sudo ifconfig br0 up" | 
|  | simp ssh tut sw1 --cmd "sudo ifconfig sw1p1 up" | 
|  | simp ssh tut sw1 --cmd "sudo ifconfig sw1p2 up" | 
|  |  | 
|  | # test... | 
|  |  | 
|  | simp ssh tut h1 --cmd "ping -w 1 -c1 11.0.0.2 >/dev/null" | 
|  | if [ $? -eq 0 ]; then exit 1; fi | 
|  | sleep 10 | 
|  | simp ssh tut h1 --cmd "ping -c10 11.0.0.2 >/dev/null" | 
|  | sleep 10 | 
|  | simp ssh tut h1 --cmd "ping -c10 11.0.0.2 >/dev/null" | 
|  | sleep 10 | 
|  | simp ssh tut h1 --cmd "ping -c10 11.0.0.2 >/dev/null" | 
|  | sleep 10 | 
|  | simp ssh tut h1 --cmd "ping -c10 11.0.0.2 >/dev/null" | 
|  | sleep 10 | 
|  | simp ssh tut h1 --cmd "ping -c10 11.0.0.2 >/dev/null" |