CODEWITHSUNDEEP
openflowopendaylight
Haitham
Haitham

Reputation: 89

clustering opendaylight-boron

I am new to Opendaylight (Boron) clustering using Mininet. I followed the instructions provided through "http://docs.opendaylight.org/en/stable-boron/getting-started-guide/common-features/clustering.html" and I configured three nodes cluster. All three nodes show the full topology of connected switches in the dlux GUI. However, when I try to ping all hosts using the "pingall" command. I am losing most of the packets. and the controller is only showing the part of the hosts in the topology.

h1 -> X X h4 h5 X h7 h8 h9 h10 h11 h12 h13 X h15 h16
h2 -> h1 h3 h4 h5 X h7 h8 h9 h10 h11 h12 h13 X h15 h16
h3 -> h1 h2 h4 h5 X h7 h8 h9 h10 h11 h12 h13 X h15 h16
h4 -> h1 h2 h3 h5 X h7 h8 h9 h10 h11 h12 h13 X h15 h16
h5 -> h1 h2 h3 h4 X h7 h8 h9 h10 h11 h12 h13 X h15 h16
h6 -> X X X X X X X X X X X X h14 X X
h7 -> h1 h2 h3 h4 h5 X h8 h9 h10 h11 h12 h13 X h15 h16
h8 -> h1 h2 h3 h4 h5 X h7 h9 h10 h11 h12 h13 X h15 h16
h9 -> h1 h2 h3 h4 h5 X h7 h8 h10 h11 h12 h13 X h15 h16
h10 -> h1 h2 h3 h4 h5 X h7 h8 h9 h11 h12 h13 X h15 h16
h11 -> h1 h2 h3 h4 h5 X h7 h8 h9 h10 h12 h13 X h15 h16
h12 -> h1 h2 h3 h4 h5 X h7 h8 h9 h10 h11 h13 X h15 h16
h13 -> h1 h2 h3 h4 h5 X h7 h8 h9 h10 h11 h12 X h15 h16
h14 -> X X X X X h6 X X X X X X X X X
h15 -> h1 h2 h3 h4 h5 X h7 h8 h9 h10 h11 h12 h13 X h16
h16 -> h1 h2 h3 h4 h5 X h7 h8 h9 h10 h11 h12 h13 X h15
*** Results: 24% dropped (182/240 received)

the topology works fine when testing under a single controller, I tested different topology sizes, and got the same results. I noticed that My akka.conf file is missing the class "dl-cluster-rpc" when compared to the example in the provided link.

I used the addSwitch and addHost functions to create the switches and hosts before starting the topology

        sw = self.addSwitch('c{}'.format(i + 1),cls=OVSKernelSwitch, protocols='OpenFlow13')
            host = self.addHost('h{}'.format(count))

the following is how I tried to add multiple controllers in my mininet:

    topo = FatTreeTopo()
    net = Mininet(topo=topo, controller=None, link=TCLink)
    cnt1 = net.addController( 'cnt1',controller=RemoteController,ip='159.203.64.13')
    cnt2 = net.addController( 'cnt2',controller=RemoteController,ip='159.203.10.11')
    cnt3 = net.addController( 'cnt3',controller=RemoteController,ip='159.203.18.68')

    info('*** Starting network\n')
    cnt1.start()
    cnt2.start()
    cnt3.start()
    switches = net.switches
    for sname in switches:
        sname.start([cnt1,cnt2,cnt3]
   net.start()

I checked all switches being connected to the three controllers using the OVS-VSCTL command:

Bridge "e16" Controller "tcp:159.203.103.171:6653"
is_connected: true
Controller "tcp:159.203.118.68:6653"
is_connected: true
Controller "tcp:159.203.64.133:6653"
is_connected: true

Moreover, the following shows the openflow table for a switch and I see rules for forwarding packet to all three controllers.

OFPST_FLOW reply (OF1.3) (xid=0x2): cookie=0x2b00000000000013, duration=511.822s, table=0, n_packets=206, n_bytes=17510, priority=100,dl_type=0x88cc actions=CONTROLLER:65535 cookie=0x2b0000000000001a, duration=506.785s, table=0, n_packets=3106, n_bytes=462409, priority=2,in_port=2 actions=output:4,output:3 cookie=0x2b0000000000001b, duration=506.785s, table=0, n_packets=69, n_bytes=4354, priority=2,in_port=4 actions=output:2,output:3,CONTROLLER:65535 cookie=0x2b0000000000001c, duration=506.757s, table=0, n_packets=81, n_bytes=4970, priority=2,in_port=3 actions=output:2,output:4,CONTROLLER:65535 cookie=0x2b00000000000013, duration=511.822s, table=0, n_packets=129, n_bytes=22447, priority=0 actions=drop

thanks a lot and best wishes

Upvotes: 0

Views: 180

Answers (1)

Sunil Kumar
Sunil Kumar

Reputation: 320

there might be multiple cause for the issue

1) Check the karaf logs

2) Check the entity ownership details

3) Check the datastore shard status

4) Is there any connection flap between controllers, controller and switches

5) check for the flows or entries in operational and config DS.

This should give you fair idea on what is the issue.

Upvotes: 0

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