DHCP server beyond upstream router
Change-Id: I41ae02705c62e3144cf8cd914865c83b2c43ba61
diff --git a/trellis/trellis_remote_dhcp.py b/trellis/trellis_remote_dhcp.py
new file mode 100755
index 0000000..73bc8f3
--- /dev/null
+++ b/trellis/trellis_remote_dhcp.py
@@ -0,0 +1,143 @@
+#!/usr/bin/python
+
+import sys
+sys.path.append('..')
+from mininet.topo import Topo
+from mininet.net import Mininet
+from mininet.cli import CLI
+from mininet.log import setLogLevel
+from mininet.node import RemoteController, OVSBridge, Host
+from mininet.nodelib import NAT
+from ipaddress import ip_network
+from routinglib import BgpRouter
+from routinglib import RoutedHost
+
+class Trellis( Topo ):
+ "Trellis basic topology"
+
+ def __init__( self, *args, **kwargs ):
+ Topo.__init__( self, *args, **kwargs )
+
+ # Spines
+ s226 = self.addSwitch('s226', dpid='226')
+ s227 = self.addSwitch('s227', dpid='227')
+
+ # Leaves
+ s204 = self.addSwitch('s204', dpid='204')
+ s205 = self.addSwitch('s205', dpid='205')
+
+ # Switch Links
+ self.addLink(s226, s204)
+ self.addLink(s226, s205)
+ self.addLink(s227, s204)
+ self.addLink(s227, s205)
+
+ # NOTE avoid using 10.0.1.0/24 which is the default subnet of quaggas
+ # NOTE avoid using 00:00:00:00:00:xx which is the default mac of host behind upstream router
+ # IPv4 Hosts
+ h1 = self.addHost('h1', cls=DhcpClient, mac='00:aa:00:00:00:01')
+ h2 = self.addHost('h2', cls=DhcpClient, mac='00:aa:00:00:00:02')
+ h3 = self.addHost('h3', cls=DhcpClient, mac='00:aa:00:00:00:03')
+ h4 = self.addHost('h4', cls=DhcpClient, mac='00:aa:00:00:00:04')
+ self.addLink(h1, s204)
+ self.addLink(h2, s204)
+ self.addLink(h3, s205)
+ self.addLink(h4, s205)
+
+ # IPv6 Hosts
+ h1v6 = self.addHost('h1v6', cls=RoutedHost, mac='00:bb:00:00:00:01', ips=['2000::201/120'], gateway='2000::2ff')
+ h2v6 = self.addHost('h2v6', cls=RoutedHost, mac='00:bb:00:00:00:02', ips=['2000::202/120'], gateway='2000::2ff')
+ h3v6 = self.addHost('h3v6', cls=RoutedHost, mac='00:bb:00:00:00:03', ips=['2000::301/120'], gateway='2000::3ff')
+ h4v6 = self.addHost('h4v6', cls=RoutedHost, mac='00:bb:00:00:00:04', ips=['2000::302/120'], gateway='2000::3ff')
+ self.addLink(h1v6, s204)
+ self.addLink(h2v6, s204)
+ self.addLink(h3v6, s205)
+ self.addLink(h4v6, s205)
+
+ # Control plane switch (for quagga fpm)
+ cs0 = self.addSwitch('cs0', cls=OVSBridge)
+
+ # Control plane NAT (for quagga fpm)
+ nat = self.addHost('nat', cls=NAT,
+ ip='172.16.0.1/12',
+ subnet=str(ip_network(u'172.16.0.0/12')), inNamespace=False)
+ self.addLink(cs0, nat)
+
+ # Internal Quagga bgp1
+ intfs = {'bgp1-eth0': {'ipAddrs': ['10.0.1.2/24', '2000::102/120'], 'mac': '00:88:00:00:00:02'},
+ 'bgp1-eth1': {'ipAddrs': ['172.16.0.2/12']}}
+ bgp1 = self.addHost('bgp1', cls=BgpRouter,
+ interfaces=intfs,
+ quaggaConfFile='./bgpdbgp1.conf',
+ zebraConfFile='./zebradbgp1.conf')
+ self.addLink(bgp1, s205)
+ self.addLink(bgp1, cs0)
+
+ # External Quagga r1
+ intfs = {'r1-eth0': {'ipAddrs': ['10.0.1.1/24', '2000::101/120'], 'mac': '00:88:00:00:00:01'},
+ 'r1-eth1': {'ipAddrs': ['10.0.99.1/16']},
+ 'r1-eth2': {'ipAddrs': ['2000::9901/120']}}
+ r1 = self.addHost('r1', cls=BgpRouter,
+ interfaces=intfs,
+ quaggaConfFile='./bgpdr1.conf')
+ self.addLink(r1, s205)
+
+ # External switch behind r1
+ rs0 = self.addSwitch('rs0', cls=OVSBridge)
+ self.addLink(r1, rs0)
+
+ # External IPv4 Host behind r1
+ rh1 = self.addHost('rh1', cls=RoutedHost, ips=['10.0.99.2/24'], gateway='10.0.99.1')
+ self.addLink(rs0, rh1)
+
+ # External DHCP server behind r1
+ dhcp = self.addHost('dhcp', cls=DhcpServer, mac='00:99:00:00:00:01', ips=['10.0.99.3/24'], gateway='10.0.99.1')
+ self.addLink(rs0, dhcp)
+
+ # External IPv6 Host behind r1
+ rh1v6 = self.addHost('rh1v6', cls=RoutedHost, ips=['2000::9902/120'], gateway='2000::9901')
+ self.addLink(r1, rh1v6)
+
+topos = { 'trellis' : Trellis }
+
+class DhcpClient(Host):
+ def __init__(self, name, *args, **kwargs):
+ super(DhcpClient, self).__init__(name, **kwargs)
+ self.pidFile = '/run/dhclient-%s.pid' % self.name
+
+ def config(self, **kwargs):
+ super(DhcpClient, self).config(**kwargs)
+ self.cmd('ip addr flush dev %s' % self.defaultIntf())
+ self.cmd('dhclient -q -4 -nw -pf %s %s' % (self.pidFile, self.defaultIntf()))
+
+ def terminate(self, **kwargs):
+ self.cmd('kill -9 `cat %s`' % self.pidFile)
+ self.cmd('rm -rf %s' % self.pidFile)
+ super(DhcpClient, self).terminate()
+
+class DhcpServer(RoutedHost):
+ binFile = '/usr/sbin/dhcpd'
+ pidFile = '/run/dhcp-server/dhcpd.pid'
+ configFile = './dhcpd.conf'
+
+ def config(self, **kwargs):
+ super(DhcpServer, self).config(**kwargs)
+ self.cmd('%s -q -4 -pf %s -cf %s %s' % (self.binFile, self.pidFile, self.configFile, self.defaultIntf()))
+
+ def terminate(self, **kwargs):
+ self.cmd('kill -9 `cat %s`' % self.pidFile)
+ self.cmd('rm -rf %s' % self.pidFile)
+ super(DhcpServer, self).terminate()
+
+if __name__ == "__main__":
+ setLogLevel('debug')
+ topo = Trellis()
+
+ net = Mininet(topo=topo, controller=None)
+ net.addController(RemoteController('c0', ip='192.168.56.11'))
+ net.addController(RemoteController('c1', ip='192.168.56.12'))
+ net.addController(RemoteController('c2', ip='192.168.56.13'))
+
+ net.start()
+ CLI(net)
+ net.stop()