ONOS-693 SDN-IP tutorial script for IPv6.

New script tutorial_ipv6.py is added.

o Switch OpenFlow version set to OpenFlow 1.3
o IPv6 forwarding is enabled

Change-Id: Ie6840f38f0d09d9afb5b5791d26f7af14c4785d6

+#!/usr/bin/python
+
+from mininet.topo import Topo
+from mininet.net import Mininet
+from mininet.cli import CLI
+from mininet.log import setLogLevel, info, debug
+from mininet.node import Host, RemoteController, OVSSwitch
+
+QUAGGA_DIR = '/usr/lib/quagga'
+# Must exist and be owned by quagga user (quagga:quagga by default on Ubuntu)
+QUAGGA_RUN_DIR = '/var/run/quagga'
+CONFIG_DIR = 'configs'
+
+class SdnIpHost(Host):
+    def __init__(self, name, ip, route, *args, **kwargs):
+        Host.__init__(self, name, ip=ip, *args, **kwargs)
+
+        self.route = route
+
+    def config(self, **kwargs):
+        Host.config(self, **kwargs)
+
+        debug("configuring route %s" % self.route)
+
+        self.cmd('ip route add default via %s' % self.route)
+
+class Router(Host):
+    def __init__(self, name, quaggaConfFile, zebraConfFile, intfDict, *args, **kwargs):
+        Host.__init__(self, name, *args, **kwargs)
+
+        self.quaggaConfFile = quaggaConfFile
+        self.zebraConfFile = zebraConfFile
+        self.intfDict = intfDict
+
+    def config(self, **kwargs):
+        Host.config(self, **kwargs)
+        self.cmd('sysctl net.ipv4.ip_forward=1')
+        self.cmd('sysctl net.ipv6.conf.all.forwarding=1')
+
+        for intf, attrs in self.intfDict.items():
+            self.cmd('ip addr flush dev %s' % intf)
+            if 'mac' in attrs:
+                self.cmd('ip link set %s down' % intf)
+                self.cmd('ip link set %s address %s' % (intf, attrs['mac']))
+                self.cmd('ip link set %s up ' % intf)
+            for addr in attrs['ipAddrs']:
+                self.cmd('ip addr add %s dev %s' % (addr, intf))
+
+        self.cmd('/usr/lib/quagga/zebra -d -f %s -z %s/zebra%s.api -i %s/zebra%s.pid' % (self.zebraConfFile, QUAGGA_RUN_DIR, self.name, QUAGGA_RUN_DIR, self.name))
+        self.cmd('/usr/lib/quagga/bgpd -d -f %s -z %s/zebra%s.api -i %s/bgpd%s.pid' % (self.quaggaConfFile, QUAGGA_RUN_DIR, self.name, QUAGGA_RUN_DIR, self.name))
+
+
+    def terminate(self):
+        self.cmd("ps ax | egrep 'bgpd%s.pid|zebra%s.pid' | awk '{print $1}' | xargs kill" % (self.name, self.name))
+
+        Host.terminate(self)
+
+class SdnSwitch(OVSSwitch):
+    def __init__(self, name, dpid, *args, **kwargs):
+        OVSSwitch.__init__(self, name, dpid=dpid, *args, **kwargs)
+
+    def start(self, controllers):
+        OVSSwitch.start(self, controllers)
+        self.cmd("ovs-vsctl set Bridge %s protocols=OpenFlow13" % self.name)
+
+
+class SdnIpTopo( Topo ):
+    "SDN-IP tutorial topology"
+    
+    def build( self ):
+        s1 = self.addSwitch('s1', cls=SdnSwitch, dpid='00000000000000a1')
+        s2 = self.addSwitch('s2', cls=SdnSwitch, dpid='00000000000000a2')
+        s3 = self.addSwitch('s3', cls=SdnSwitch, dpid='00000000000000a3')
+        s4 = self.addSwitch('s4', cls=SdnSwitch, dpid='00000000000000a4')
+        s5 = self.addSwitch('s5', cls=SdnSwitch, dpid='00000000000000a5')
+        s6 = self.addSwitch('s6', cls=SdnSwitch, dpid='00000000000000a6')
+
+        zebraConf = '%s/zebra.conf' % CONFIG_DIR
+
+        # Switches we want to attach our routers to, in the correct order
+        attachmentSwitches = [s1, s2, s5, s6]
+
+        for i in range(1, 4+1):
+            name = 'r%s' % i
+
+            eth0 = { 'mac' : '00:00:00:00:0%s:01' % i,
+                     'ipAddrs' : ['10.0.%s.1/24' % i] }
+            eth1 = { 'ipAddrs' : ['192.168.%s.254/24' % i] }
+            intfs = { '%s-eth0' % name : eth0,
+                      '%s-eth1' % name : eth1 }
+
+            quaggaConf = '%s/quagga%s.conf' % (CONFIG_DIR, i)
+
+            router = self.addHost(name, cls=Router, quaggaConfFile=quaggaConf,
+                                  zebraConfFile=zebraConf, intfDict=intfs)
+            
+            host = self.addHost('h%s' % i, cls=SdnIpHost, 
+                                ip='192.168.%s.1/24' % i,
+                                route='192.168.%s.254' % i)
+            
+            self.addLink(router, attachmentSwitches[i-1])
+            self.addLink(router, host)
+
+        # Set up the internal BGP speaker
+        bgpEth0 = { 'mac':'00:00:00:00:00:01', 
+                    'ipAddrs' : ['10.0.1.101/24',
+                                 '10.0.2.101/24',
+                                 '10.0.3.101/24',
+                                 '10.0.4.101/24',] }
+        bgpEth1 = { 'ipAddrs' : ['10.10.10.1/24'] }
+        bgpIntfs = { 'bgp-eth0' : bgpEth0,
+                     'bgp-eth1' : bgpEth1 }
+        
+        bgp = self.addHost( "bgp", cls=Router, 
+                             quaggaConfFile = '%s/quagga-sdn.conf' % CONFIG_DIR, 
+                             zebraConfFile = zebraConf, 
+                             intfDict=bgpIntfs )
+        
+        self.addLink( bgp, s3 )
+
+        # Connect BGP speaker to the root namespace so it can peer with ONOS
+        root = self.addHost( 'root', inNamespace=False, ip='10.10.10.2/24' )
+        self.addLink( root, bgp )
+
+
+        # Wire up the switches in the topology
+        self.addLink( s1, s2 )
+        self.addLink( s1, s3 )
+        self.addLink( s2, s4 )
+        self.addLink( s3, s4 )
+        self.addLink( s3, s5 )
+        self.addLink( s4, s6 )
+        self.addLink( s5, s6 )
+
+topos = { 'sdnip' : SdnIpTopo }
+
+if __name__ == '__main__':
+    setLogLevel('debug')
+    topo = SdnIpTopo()
+
+    net = Mininet(topo=topo, controller=RemoteController)
+
+    net.start()
+
+    CLI(net)
+
+    net.stop()
+
+    info("done\n")