1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
|
#!/usr/bin/env python
from mininet.cli import CLI
from mininet.net import Mininet
from mininet.node import RemoteController, OVSKernelSwitch
MAC = 12
DPID = 16
class CustomCLI(CLI):
"""Custom CLI to allow us to add our own commands."""
def __init__ (self, net):
"""Init method for our custom CLI."""
self.net = net
CLI.__init__(self, net)
class Solar(object):
""" Create a tiered topology from semi-scratch in Mininet """
def __init__(self, cname='onos', cips=['192.168.56.1'], islands=3, edges=2, hosts=2):
"""Create tower topology for mininet"""
# We are creating the controller with local-loopback on purpose to avoid
# having the switches connect immediately. Instead, we'll set controller
# explicitly for each switch after configuring it as we want.
self.ctrls = [ RemoteController(cname, cip, 6653) for cip in cips ]
self.net = Mininet(controller=RemoteController, switch = OVSKernelSwitch,
build=False)
self.cips = cips
self.spines = []
self.leaves = []
self.hosts = []
for ctrl in self.ctrls:
self.net.addController(ctrl)
# Create the two core switches and links between them
c1 = self.net.addSwitch('c1',dpid='1111000000000000')
c2 = self.net.addSwitch('c2',dpid='2222000000000000')
self.spines.append(c1)
self.spines.append(c2)
self.net.addLink(c1, c2)
self.net.addLink(c2, c1)
for i in range(1, islands + 1):
sc = self.createSpineClump(i, edges, hosts)
self.net.addLink(c1, sc[0])
self.net.addLink(c2, sc[0])
self.net.addLink(c1, sc[1])
self.net.addLink(c2, sc[1])
def createSpineClump(self, island, edges, hosts):
""" Creates a clump of spine and edge switches with hosts"""
s1 = self.net.addSwitch('s%1d1' % island,dpid='00000%1d0100000000' % island)
s2 = self.net.addSwitch('s%1d2' % island,dpid='00000%1d0200000000' % island)
self.net.addLink(s1, s2)
self.net.addLink(s2, s1)
for i in range(1, edges + 1):
es = self.createEdgeSwitch(island, i, hosts)
self.net.addLink(es, s1)
self.net.addLink(es, s2)
self.spines.append(s1)
self.spines.append(s2)
clump = []
clump.append(s1)
clump.append(s2)
return clump
def createEdgeSwitch(self, island, index, hosts):
""" Creates an edge switch in an island and ads hosts to it"""
sw = self.net.addSwitch('e%1d%1d' % (island, index),dpid='0000000%1d0000000%1d' % (island, index))
self.leaves.append(sw)
for j in range(1, hosts + 1):
host = self.net.addHost('h%d%d%d' % (island, index, j),ip='10.%d.%d.%d' % (island, index, j))
self.net.addLink(host, sw)
self.hosts.append(host)
return sw
def run(self):
""" Runs the created network topology and launches mininet cli"""
self.net.build()
self.net.start()
CustomCLI(self.net)
self.net.stop()
def pingAll(self):
""" PingAll to create flows - for unit testing """
self.net.pingAll()
def stop(self):
"Stops the topology. You should call this after run_silent"
self.net.stop()
|
