def startNetwork():
"instantiates a topo, then starts the network and prints debug information"
info('** Creating Quagga network topology\n')
topo = QuaggaTopo()
info('** Starting the network\n')
global net
net = MiniNExT(topo, controller=OVSController)
net.start()
info('** Dumping host connections\n')
dumpNodeConnections(net.hosts)
for host in net.hosts:
host.cmdPrint("echo 1 > /proc/sys/net/ipv4/ip_forward")
router2 = [
'ip addr add 183.0.0.2/20 dev R1-eth1',
'ip addr add 184.0.0.2/20 dev R1-eth2'
]
router3 = ['ip addr add 185.0.0.2/20 dev R2-eth1']
router4 = ['ip addr add 186.0.0.2/20 dev R3-eth1']
router5 = [
'ip addr add 185.0.0.1/20 dev R4-eth1',
'ip addr add 186.0.0.1/20 dev R4-eth2'
]
ip_addr = {2: router2, 3: router3, 4: router4, 5: router5}
info('** Setting up ip address\n')
for k, v in ip_addr.items():
for e in v:
net.hosts[k].cmdPrint(e)
info('** Dumping host processes\n')
for host in net.hosts:
host.cmdPrint("ps aux")
H1 = net.hosts[0]
H2 = net.hosts[1]
info('Pinging for Convergence\n')
pingForConv(H1, H2, 5)
getTraceroutes(H1, H2)
info('** Testing network connectivity\n')
net.ping(net.hosts)
net.configLinkStatus('R1', 'R2', 'down')
info('\nPinging for Convergence after R1-R2 link is down')
pingForConv(H1, H2, 35)
getTraceroutes(H1, H2)
info('** Running CLI\n')
CLI(net)
def startNetwork():
"instantiates a topo, then starts the network and prints debug information"
info('** Creating Quagga network topology\n')
topo = QuaggaTopo()
info('** Starting the network\n')
global net
net = MiniNExT(topo, controller=OVSController)
net.start()
info('** Dumping host connections\n')
dumpNodeConnections(net.hosts)
info('** Testing network connectivity\n')
net.ping(net.hosts)
info('** Dumping host processes\n')
h2IPAddress = "192.0.0.213"
for i in range(2, 6):
if i == 2:
net.hosts[i].cmdPrint("ip addr add 192.0.0.201/30 dev R1-eth2")
net.hosts[i].cmdPrint("ip addr add 192.0.0.197/30 dev R1-eth1")
elif i == 3:
net.hosts[i].cmdPrint("ip addr add 192.0.0.209/30 dev R2-eth1")
elif i == 4:
net.hosts[i].cmdPrint("ip addr add 192.0.0.205/30 dev R3-eth1")
elif i == 5:
net.hosts[i].cmdPrint("ip addr add 192.0.0.206/30 dev R4-eth1")
net.hosts[i].cmdPrint("ip addr add 192.0.0.214/30 dev R4-eth2")
for host in net.hosts:
host.cmdPrint("ps aux")
host.cmdPrint("echo 1 > /proc/sys/net/ipv4/ip_forward")
for i in range(len(net.hosts)):
if i == 0:
net.hosts[i].cmdPrint("route add default gw 192.0.0.194")
elif i == 1:
net.hosts[i].cmdPrint("route add default gw 192.0.0.214")
if argument == "1":
startTime = time.time()
check = 'random'
print("Checking Time taken by H1 to ping H2...Wait")
while ' 0% packet loss' not in check:
check = net.hosts[0].cmdPrint('ping -c10 ' + h2IPAddress)
if ' 0% packet loss' not in check:
print("Not able to ping in this ping..Trying again")
print(check)
endTime = time.time()
print('H1 to H2 pinging time= ', (endTime - startTime), 'sec')
if argument == "2":
startTime = time.time()
check = 1
print("Checking Convergence Time....Wait")
while check != 0:
check = net.pingAll()
if check != 0:
print("Not converged in this ping...Trying again")
endTime = time.time()
print('Convergence time= ', (endTime - startTime), 'sec')
print('Do R1-R2 Link down')
startTime = time.time()
net.configLinkStatus('R1', 'R2', 'down')
print("Link Down...Checking convergence Time")
check = 'random'
while ' 0% packet loss' not in check:
check = net.hosts[0].cmdPrint('ping -c10 ' + h2IPAddress)
if ' 0% packet loss' not in check:
print("Not able to ping in this ping..Trying again")
print(check)
endTime = time.time()
print('H1 to H2 pinging time= ', (endTime - startTime), 'sec')
info('** Running CLI\n')
CLI(net)
