Hi, Which version(ryu) you use? maybe this bug fixed before v3.23.
2015-07-06 0:46 GMT+08:00 Mehrdad Moradi <[email protected]>:
> Hi,
>
> Did you bring down the two links manually to see the output? Are these the
> only output you have received? For me, it never stops and I continuously
> get link down events. I also was able to reproduce the same problem on
> other machines.
> The problem is why do you have only two links? The linear topology should
> have four links?
>
> Best Regards,
> —Mehrdad
>
> On Jul 5, 2015, at 1:56 AM, Yi Tseng <[email protected]> wrote:
>
> 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
>
>
>
--
Yi Tseng (a.k.a Takeshi)
Taiwan National Chiao Tung University
Department of Computer Science
W2CNLab
------------------------------------------------------------------------------
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