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本例子主要演示通过VTN协调器及两个VTN管理器配置L2网络，利用mininet虚拟出openflow交换机，并对其进行控制，mininet交换机拓扑图如下：
拓扑图创建：
其中multitree.py如下：
Shell
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#!/usr/bin/python
"""
Run Mininet network using tree topology per remote controller.
"""
from mininet.cli import CLI
from mininet.log import info, setLogLevel
from mininet.net import Mininet
from mininet.node import Host, OVSKernelSwitch, RemoteController
from mininet.topo import Topo
TreeDepth = 2
FanOut = 2
ControllerAddress = ["172.31.2.70", "172.31.2.72"]
class MultiTreeTopo(Topo):
"""Topology for multiple tree network using remote controllers.
A tree network is assigned to a remote controller."""
def __init__(self):
Topo.__init__(self)
self.hostSize = 1
self.switchSize = 1
self.treeSwitches =
prev = None
for cidx in range(len(ControllerAddress)):
switches =
self.treeSwitches.append(switches)
root = self.addTree(switches, TreeDepth, FanOut)
if prev:
self.addLink(prev, root)
prev = root
def addTree(self, switches, depth, fanout):
"""Add a tree node."""
if depth > 0:
node = self.addSwitch('s%u' % self.switchSize)
self.switchSize += 1
switches.append(node)
for i in range(fanout):
child = self.addTree(switches, depth - 1, fanout)
self.addLink(node, child)
else:
node = self.addHost('h%u' % self.hostSize)
self.hostSize += 1
return node
def start(self, net):
"""Start all controllers and switches in the network."""
cidx = 0
for c in net.controllers:
info("*** Starting controller: %s\n" % c)
info("+ Starting switches ... ")
switches = self.treeSwitches[cidx]
for sname in switches:
s = net.getNodeByName(sname)
info(" %s" % s)
s.start([c])
cidx += 1
info("\n")
self.treeSwitches = None
class MultiTreeNet(Mininet):
"""Mininet network environment with multiple tree network using remote
controllers."""
def __init__(self, **args):
args['topo'] = MultiTreeTopo
args['switch'] = OVSKernelSwitch
args['controller'] = RemoteController
args['build'] = False
Mininet.__init__(self, **args)
idx = 1
for addr in ControllerAddress:
name = 'c%d' % idx
info('*** Creating remote controller: %s (%s)\n' % (name, addr))
self.addController(name, ip=addr, port=6633)
idx = idx + 1
def start(self):
"Start controller and switches."
if not self.built:
self.build
self.topo.start(self)
if __name__ == '__main__':
setLogLevel('info')# for CLI output
net = MultiTreeNet
net.build
print "*** Starting network"
net.start
print "*** Running CLI"
CLI(net)
print "*** Stopping network"
net.stop
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测试连通性：
Shell
mininet> h2 ping h6
PING 10.0.0.6 (10.0.0.6) 56(84) bytes of data.
From 10.0.0.2 icmp_seq=1 Destination Host Unreachable
From 10.0.0.2 icmp_seq=2 Destination Host Unreachable
From 10.0.0.2 icmp_seq=3 Destination Host Unreachable
下面通过vtn规则，使得h2与h6可以通信，调用接口创建相关资源：
创建vtn
Shell
curl -i --user admin:adminpass -H 'content-type: application/json' -X POST -d '{"vtn" : {"vtn_name":"vtn_one","description":"test VTN" }}' http://172.31.2.70:8083/vtn-webapi/vtns
HTTP/1.1 201 Created
创建两个控制器
Shell
curl-i --user admin:adminpass -H 'content-type: application/json' -X POST -d '{"controller": {"controller_id": "controller1", "ipaddr":"172.31.2.70", "type": "odc", "version": "1.0", "auditstatus":"enable"}}' http://172.31.2.70:8083/vtn-webapi/controllers
HTTP/1.1 201 Created
curl-i --user admin:adminpass -H 'content-type: application/json' -X POST -d '{"controller": {"controller_id": "controller2", "ipaddr":"172.31.2.72", "type": "odc", "version": "1.0", "auditstatus":"enable"}}' http://172.31.2.70:8083/vtn-webapi/controllers
HTTP/1.1 201 Created
创建虚拟桥
分别在Controller1中创建vBridge1，Controller2中创建vBridge2。
Shell
curl -i --user admin:adminpass -H 'content-type: application/json' -X POST -d '{"vbridge" : {"vbr_name":"vbr1","controller_id":"controller1","domain_id":"(DEFAULT)" }}'http://172.31.2.70:8083/vtn-webapi/vtns/vtn_one/vbridges
HTTP/1.1 201 Created
curl -i --user admin:adminpass -H 'content-type: application/json' -X POST -d '{"vbridge" : {"vbr_name":"vbr2","controller_id":"controller2","domain_id":"(DEFAULT)" }}'http://172.31.2.70:8083/vtn-webapi/vtns/vtn_one/vbridges
HTTP/1.1 201 Created
创建接口
创建4个接口，vbr1中if1，if2，vbr2中if1，if2，其中两个if2做boundary的接口，if1做h2和h6的接口。
Shell
curl -i --user admin:adminpass -H 'content-type: application/json' -X POST -d '{"interface": {"if_name": "if1","description": "if_desc1"}}' http://172.31.2.70:8083/vtn-webapi/vtns/vtn_one/vbridges/vbr1/interfaces
HTTP/1.1 201 Created
curl -i --user admin:adminpass -H 'content-type: application/json' -X POST -d '{"interface": {"if_name": "if2","description": "if_desc2"}}' http://172.31.2.70:8083/vtn-webapi/vtns/vtn_one/vbridges/vbr1/interfaces
HTTP/1.1 201 Created
curl -i --user admin:adminpass -H 'content-type: application/json' -X POST -d '{"interface": {"if_name": "if1","description": "if_desc1"}}' http://172.31.2.70:8083/vtn-webapi/vtns/vtn_one/vbridges/vbr2/interfaces
HTTP/1.1 201 Created
curl -i --user admin:adminpass -H 'content-type: application/json' -X POST -d '{"interface": {"if_name": "if2","description": "if_desc2"}}' http://172.31.2.70:8083/vtn-webapi/vtns/vtn_one/vbridges/vbr2/interfaces
HTTP/1.1 201 Created
创建boundary和vLink
Shell
curl -i --user admin:adminpass -H 'content-type: application/json' -X POST -d '{"boundary": {"boundary_id": "b1", "link": {"controller1_id": "controller1", "domain1_id": "(DEFAULT)","logical_port1_id": "PP-OF:openflow:1-s1-eth3", "controller2_id": "controller2", "domain2_id": "(DEFAULT)", "logical_port2_id": "PP-OF:openflow:4-s4-eth3"}}}' http://172.31.2.70:8083/vtn-webapi/boundaries
HTTP/1.1 201 Created
curl -i --user admin:adminpass -H 'content-type: application/json' -X POST -d '{"vlink": {"vlk_name": "vlink1" , "vnode1_name": "vbr1", "if1_name":"if2", "vnode2_name": "vbr2", "if2_name": "if2", "boundary_map": {"boundary_id":"b1","vlan_id": "50"}}}' http://127.0.0.1:8083/vtn-webapi/vtns/vtn_one/vlinks.json
HTTP/1.1 201 Created
配置端口映射关系
Shell
curl -i --user admin:adminpass -H 'content-type: application/json' -X PUT -d '{"portmap":{"logical_port_id": "PP-OF:openflow:2-s2-eth2"}}' http://172.31.2.70:8083/vtn-webapi/vtns/vtn_one/vbridges/vbr1/interfaces/if1/portmap
HTTP/1.1 204 No Content
curl -i --user admin:adminpass -H 'content-type: application/json' -X PUT -d '{"portmap":{"logical_port_id": "PP-OF:openflow:5-s5-eth2"}}' http://172.31.2.70:8083/vtn-webapi/vtns/vtn_one/vbridges/vbr2/interfaces/if1/portmap
HTTP/1.1 204 No Content
监测是否可以通信：
64 bytes from 10.0.0.6: icmp_seq=1 ttl=64 time=12.2 ms
64 bytes from 10.0.0.6: icmp_seq=2 ttl=64 time=0.184 ms
64 bytes from 10.0.0.6: icmp_seq=3 ttl=64 time=0.042 ms
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成长值: 15613
发表于 2017-9-17 13:04:13
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