changed task3a

scripts/task3a_topo.py

@@ -0,0 +1,77 @@
+from mininet.topo import Topo
+from mininet.net import Mininet
+from mininet.node import Node
+from mininet.log import setLogLevel, info
+from mininet.cli import CLI
+from mininet.net import Mininet
+from mininet.node import Controller, RemoteController, OVSController
+from mininet.node import CPULimitedHost, Host, Node
+from mininet.node import OVSKernelSwitch, UserSwitch
+from mininet.node import IVSSwitch
+from mininet.cli import CLI
+from mininet.log import setLogLevel, info
+from mininet.node import Node
+from mininet.link import TCLink, Intf
+from subprocess import call
+
+
+
+class LinuxRouter( Node ):
+    "A Node with IP forwarding enabled."
+
+    def config( self, **params ):
+        super( LinuxRouter, self).config( **params )
+        # Enable forwarding on the router
+        self.cmd( 'sysctl net.ipv4.ip_forward=1' )
+
+    def terminate( self ):
+        self.cmd( 'sysctl net.ipv4.ip_forward=0' )
+        super( LinuxRouter, self ).terminate()
+
+
+class NetworkTopo( Topo ):
+
+    def build( self, **_opts ):
+        router = self.addNode( 'r0', cls=LinuxRouter, ip='10.0.0.1/24' )
+        s1 = self.addSwitch('s1', cls=OVSKernelSwitch)
+        s2 = self.addSwitch('s2', cls=OVSKernelSwitch)
+        s3 = self.addSwitch('s3', cls=OVSKernelSwitch)
+
+        info( '*** Add hosts\n')
+        stu1 = self.addHost('stu1', cls=Host, ip='10.0.0.2', defaultRoute ='via 10.0.0.1')
+        stu2 = self.addHost('stu2', cls=Host, ip='10.0.0.3', defaultRoute ='via 10.0.0.1')
+        fac1 = self.addHost('fac1', cls=Host, ip='10.0.0.101', defaultRoute ='via 10.0.0.1')
+        fac2 = self.addHost('fac2', cls=Host, ip='10.0.0.102', defaultRoute='via 10.0.0.1')
+
+        ext1 = self.addHost('ext1', cls=Host, ip='12.12.12.12', defaultRoute='via 12.12.12.1')
+        ext2 = self.addHost('ext2', cls=Host, ip='11.11.11.11', defaultRoute='via 11.11.11.1')
+
+        info( '*** Add links\n')
+        self.addLink(s3, router,intfName2='r0-eth1',params2={'ip':'10.0.0.1/24'})
+        self.addLink(ext1, router,intfName2='r0-eth2',params2={'ip':'12.12.12.1/24'})
+        self.addLink(ext2, router,intfName2='r0-eth3',params2={'ip':'11.11.11.1/24'})
+        self.addLink(stu1, s1)
+        self.addLink(stu2, s1)
+        self.addLink(fac1, s2)
+        self.addLink(fac2, s2)
+        self.addLink(s2,s3)
+        self.addLink(s1,s3)
+
+
+
+def run():
+    "Test linux router"
+    topo = NetworkTopo()
+    net = Mininet( topo=topo )  # controller is used by s1-s3
+    net.start()
+    #info( '*** Routing Table on Router:\n' )
+    #info( net[ 'r0' ].cmd( 'route' ) )
+    # net['ext1'].cmd('python -m SimpleHTTPServer 80')
+    # net['ext2'].cmd('python -m SimpleHTTPServer 80')
+
+    CLI( net )
+    net.stop()
+
+if __name__ == '__main__':
+    setLogLevel( 'info' )
+    run()

tasks/task3/bandlimit.md

@@ -6,9 +6,9 @@ And there is a external internet where two Servers are running
 The objective is to rate limit the bandwidth allocated to students and faculty does not have any such limits
 
 #### Run script:
-Use [topo.py](https://github.com/shreyakupadhyay/SDN-Project/blob/master/scripts/task3_topo.py)
+Use [topo.py](https://github.com/shreyakupadhyay/SDN-Project/blob/master/scripts/task3a_topo.py)
 ```
-$ sudo mn --custom mesh.py --topo task3_topo.py --controller=remote,ip=127.0.0.1
+$ python task3a_topo.py
 ```
 This setsup the mininet environment and the topology of the simple campus network
 

tasks/task3/firewall.md

@@ -18,7 +18,7 @@ To run the firewall first we need to setup the campus network on the mininet.
 
 Use [topo.py](https://github.com/shreyakupadhyay/SDN-Project/blob/master/scripts/task3_topo.py)
 ```sh
-$ sudo mn --custom mesh.py --topo task3_topo.py --controller=remote,ip=127.0.0.1
+$ sudo mn --custom mesh.py --topo task3b_topo.py --controller=remote,ip=127.0.0.1
 ```
 Here we are using a remote Open Day light controller instead of a normal POX controller which is default by the mininet.