From 555d10dea7232588cb5039a0c6989e197232be40 Mon Sep 17 00:00:00 2001
From: Brian O'Connor <bocon13@gmail.com>
Date: Thu, 3 Oct 2013 15:15:40 -0700
Subject: [PATCH] adding internet / nat example
---
examples/natnet.py | 69 ++++++++++++++++++++++++++++++++++++++++++++++
1 file changed, 69 insertions(+)
create mode 100755 examples/natnet.py
diff --git a/examples/natnet.py b/examples/natnet.py
new file mode 100755
index 00000000..718ca42f
--- /dev/null
+++ b/examples/natnet.py
@@ -0,0 +1,69 @@
+#!/usr/bin/python
+
+"""
+natnet.py: Example network with NATs
+
+
+ h0
+ |
+ s0
+ |
+ ----------------
+ | |
+ nat1 nat2
+ | |
+ s1 s2
+ | |
+ h1 h2
+
+"""
+
+from mininet.topo import Topo
+from mininet.net import Mininet
+from mininet.node import NAT
+from mininet.log import setLogLevel
+from mininet.cli import CLI
+from mininet.util import irange
+
+class InternetTopo(Topo):
+ "Single switch connected to n hosts."
+ def __init__(self, n=2, h=1, **opts):
+ Topo.__init__(self, **opts)
+
+ # set up inet switch
+ inetSwitch = self.addSwitch('s0')
+ # add inet host
+ inetHost = self.addHost('h0')
+ self.addLink(inetSwitch, inetHost)
+
+ # add local nets
+ for i in irange(1, n):
+ inetIntf = 'nat%d-eth0' % i
+ localIntf = 'nat%d-eth1' % i
+ localIP = '192.168.%d.1' % i
+ localSubnet = '192.168.%d.0/24' % i
+ natParams = { 'ip' : '%s/24' % localIP }
+ # add NAT to topology
+ nat = self.addNode('nat%d' % i, cls=NAT, subnet=localSubnet,
+ inetIntf=inetIntf, localIntf=localIntf)
+ switch = self.addSwitch('s%d' % i)
+ # connect NAT to inet and local switches
+ self.addLink(nat, inetSwitch, intfName1=inetIntf)
+ self.addLink(nat, switch, intfName1=localIntf, params1=natParams)
+ # add host and connect to local switch
+ host = self.addHost('h%d' % i,
+ ip='192.168.%d.100/24' % i,
+ defaultRoute='via %s' % localIP)
+ self.addLink(host, switch)
+
+def perfTest():
+ "Create network and run simple performance test"
+ topo = InternetTopo()
+ net = Mininet(topo=topo)
+ net.start()
+ CLI(net)
+ net.stop()
+
+if __name__ == '__main__':
+ setLogLevel('info')
+ perfTest()
\ No newline at end of file
--
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