Hello
It works fine on my computer.
mn command:
sudo mn --controller=remote,ip=10.10.10.10 --topo=linear,3 --mac
--switch=ovsk,protocols=OpenFlow13
New Link Delete Link: Port<dpid=1, port_no=2, DOWN> to Port<dpid=2,
port_no=2, LIVE>
Current links After Deletion Link: Port<dpid=2, port_no=3, LIVE> to
Port<dpid=3, port_no=2, LIVE>
Current links After Deletion Link: Port<dpid=3, port_no=2, LIVE> to
Port<dpid=2, port_no=3, LIVE>
New Link Delete Link: Port<dpid=2, port_no=2, LIVE> to Port<dpid=1,
port_no=2, LIVE>
Current links After Deletion Link: Port<dpid=2, port_no=3, LIVE> to
Port<dpid=3, port_no=2, LIVE>
Current links After Deletion Link: Port<dpid=3, port_no=2, LIVE> to
Port<dpid=2, port_no=3, LIVE>
My env:
ryu v3.23 with python 3.4 on OSX
mininet 2.2.1 with ovs 2.0.2 on Ubuntu 14.04 VM
2015-07-05 3:03 GMT+08:00 Mehrdad Moradi <[email protected]>:
> Hi All,
>
> I am using mininet and ryu to do some research work. Unfortunately, it
> seems the link down events are not stable in the RYU source code. I have
> simply added the following block to simple_switch_13 to see the link down
> events.
>
> @set_ev_cls(event.EventLinkDelete, MAIN_DISPATCHER)
> def linkDeleteHandler(self, ev):
> link_list = get_link(self.topology_api_app, None)
> self.logger.info("New Link Delete %s", ev.link)
> for link in link_list:
> self.logger.info("\tCurrent links After Deletion %s", link)
>
> I am receiving numerous link down events for the links that exist while
> the topology is the same before and after such events. To reproduce this
> issue, please do the following:
>
> 1) sudo mn --topo linear,3 --mac --controller remote --switch ovsk
> 2) sudo ovs-vsctl set bridge s1 protocols=OpenFlow13
> 3) sudo ovs-vsctl set bridge s2 protocols=OpenFlow13
> 4) sudo ovs-vsctl set bridge s3 protocols=OpenFlow13
> 5) ryu-manager --observe-links simple_switch-bug.py (attached)
>
> You can see the following block continuously in the output. You have
> received a link down events
> for the link that exist in the self.topology_api_app.
>
> New Link Delete Link:* Port<dpid=3, port_no=2, LIVE> to Port<dpid=2,
> port_no=3, LIVE>*
> Current links After Deletion Link: Port<dpid=2, port_no=3, LIVE> to
> Port<dpid=3, port_no=2, LIVE>
> Current links After Deletion Link: *Port<dpid=3, port_no=2, LIVE> to
> Port<dpid=2, port_no=3, LIVE>*
> Current links After Deletion Link: Port<dpid=3, port_no=2, LIVE> to
> Port<dpid=1, port_no=2, LIVE>
> Current links After Deletion Link: Port<dpid=2, port_no=2, LIVE> to
> Port<dpid=1, port_no=2, LIVE>
> Current links After Deletion Link: Port<dpid=1, port_no=2, LIVE> to
> Port<dpid=3, port_no=2, LIVE>
> Current links After Deletion Link: Port<dpid=1, port_no=2, LIVE> to
> Port<dpid=2, port_no=2, LIVE>
>
> Best Regards
> —Mehrdad
>
>
>
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>
--
Yi Tseng (a.k.a Takeshi)
Taiwan National Chiao Tung University
Department of Computer Science
W2CNLab
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