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)
def startNetwork(static_routes):
"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()
t_start = datetime.now()
info('** Dumping host connections\n')
dumpNodeConnections(net.hosts)
net.get('H1').cmd('sysctl -w net.ipv4.ip_forward=1')
net.get('H2').cmd('sysctl -w net.ipv4.ip_forward=1')
net.get("R1").cmd("sysctl -w net.ipv4.ip_forward=1")
net.get("R2").cmd("sysctl -w net.ipv4.ip_forward=1")
net.get("R3").cmd("sysctl -w net.ipv4.ip_forward=1")
net.get("R4").cmd("sysctl -w net.ipv4.ip_forward=1")
net.get("R1").cmd("ifconfig R1-eth1 172.0.2.2/24")
net.get("R1").cmd("ifconfig R1-eth2 172.0.3.2/24")
net.get("R2").cmd("ifconfig R2-eth0 172.0.2.1/24")
net.get("R2").cmd("ifconfig R2-eth1 172.0.5.1/24")
net.get("R3").cmd("ifconfig R3-eth0 172.0.3.1/24")
net.get("R3").cmd("ifconfig R3-eth1 172.0.6.1/24")
net.get("R4").cmd("ifconfig R4-eth0 172.0.4.1/24")
net.get("R4").cmd("ifconfig R4-eth1 172.0.5.2/24")
net.get("R4").cmd("ifconfig R4-eth2 172.0.6.2/24")
net.get("H2").cmd("ifconfig H2-eth0 172.0.4.2/24")
if static_routes:
net.get("R1").cmd("ip route add 172.0.5.0/24 via 172.0.2.1 dev R1-eth1")
net.get("R1").cmd("ip route add 172.0.4.0/24 via 172.0.2.1 dev R1-eth1")
net.get("R1").cmd("ip route add 172.0.4.0/24 via 172.0.3.1 dev R1-eth2")
net.get("R1").cmd("ip route add 172.0.6.0/24 via 172.0.3.1 dev R1-eth2")
net.get("R2").cmd("ip route add 172.0.1.0/24 via 172.0.2.2 dev R2-eth0")
net.get("R2").cmd("ip route add 172.0.4.0/24 via 172.0.5.2 dev R2-eth1")
net.get("R2").cmd("ip route add 172.0.3.0/24 via 172.0.2.2 dev R2-eth0")
net.get("R3").cmd("ip route add 172.0.1.0/24 via 172.0.3.2 dev R3-eth0")
net.get("R3").cmd("ip route add 172.0.2.0/24 via 172.0.3.2 dev R3-eth0")
net.get("R3").cmd("ip route add 172.0.4.0/24 via 172.0.6.2 dev R3-eth1")
net.get("R4").cmd("ip route add 172.0.2.0/24 via 172.0.5.1 dev R4-eth1")
net.get("R4").cmd("ip route add 172.0.3.0/24 via 172.0.6.1 dev R4-eth2")
net.get("R4").cmd("ip route add 172.0.1.0/24 via 172.0.5.1 dev R4-eth1")
net.get("R4").cmd("ip route add 172.0.1.0/24 via 172.0.6.1 dev R4-eth2")
net.get("R1").cmd("iptables -t nat -A POSTROUTING -o R1-eth0 -j MASQUERADE")
net.get("R1").cmd("iptables -A FORWARD -i R1-eth0 -o R1-eth1 -m state --state RELATED,ESTABLISHED -j ACCEPT")
net.get("R1").cmd("iptables -A FORWARD -i R1-eth1 -o R1-eth0 -j ACCEPT")
net.get("R2").cmd("iptables -t nat -A POSTROUTING -o R2-eth0 -j MASQUERADE")
net.get("R2").cmd("iptables -A FORWARD -i R2-eth0 -o R2-eth1 -m state --state RELATED,ESTABLISHED -j ACCEPT")
net.get("R2").cmd("iptables -A FORWARD -i R2-eth1 -o R2-eth0 -j ACCEPT")
net.get("R3").cmd("iptables -t nat -A POSTROUTING -o R3-eth1 -j MASQUERADE")
net.get("R3").cmd("iptables -A FORWARD -i R3-eth1 -o R3-eth0 -m state --state RELATED,ESTABLISHED -j ACCEPT")
net.get("R3").cmd("iptables -A FORWARD -i R3-eth0 -o R3-eth1 -j ACCEPT")
net.get("R4").cmd("iptables -t nat -A POSTROUTING -o R4-eth0 -j MASQUERADE")
net.get("R4").cmd("iptables -A FORWARD -i R4-eth0 -o R4-eth1 -m state --state RELATED,ESTABLISHED -j ACCEPT")
net.get("R4").cmd("iptables -A FORWARD -i R4-eth1 -o R4-eth0 -j ACCEPT")
net.get("R4").cmd("iptables -A FORWARD -i R4-eth2 -o R4-eth0 -m state --state RELATED,ESTABLISHED -j ACCEPT")
net.get("R4").cmd("iptables -A FORWARD -i R4-eth0 -o R4-eth2 -j ACCEPT")
info('** Testing network connectivity\n')
info('** Dumping host processes\n')
for host in net.hosts:
host.cmdPrint("ps aux")
info('** Running CLI\n')
loss = 100
while (loss > 0):
loss = net.pingAll()
t_end = datetime.now() - t_start
print "Percentage Loss: " + str(loss)
print "Route Convergence Time: " + str(t_end.total_seconds()) + "seconds"
if static_routes:
print ("[MESSAGE:] Enabling Static Routes...")
else:
print ("[MESSAGE:] Disabling Static Routes...")
CLI(net)
