[ovs-discuss] [controller-dev] OVS Path Switching

[Madhu Venguopal]

Hi Abhishek,

As the error indicates, FRM detected a Flow-Conflict when the 
SimpleForwarding application tries to install a conflicting action for
a pre-existing flow. Ideally during a NodeConnector-down / 
routing-change event, FRM / SimpleForwarding application is supposed
to remove the old and install a new based on the discovered new 
shortest-path. Seems like the entry removal is failing (or) the install
is happening before the removal is done. Please open a bug @ 
bugs.opendaylight.org against the SimpleForwarding application.

Thanks,
-Madhu

On 10/21/13 9:58 PM, abhishek jain wrote:
>
> 	
> 	
> 	
>
> Hi all,
>
> The Toplology which I'm using is attached alongwith.
>
> By default I'm able to ping the two PCs with proactive flows pushed  
> through the shortest paths i.e through PATH-1.However when I remove 
> Path-1,the two PCs are not able to ping each other through PATH-2.
> When I am removing the wire from the eth2 interface i.e removing the 
> shortest path,then Opendaylight controller should push rules again and 
> it should choose Path2 for communication but it is not happening 
> automatically.
> The topplogy change is detected by the opendaylight conrtoller in the 
> GUI but the Proactive rules pushed onto the the openflow switches 
> remain same.
> The logs when PATH-1 is removed are as follows.....
>
>
> 10-21 12:29:16.944 IST [Thread-18] ERROR o.o.c.s.s.i.
> SimpleForwardingImpl - Failed to install policy: 192.168.1.10/32 
> <http://192.168.1.10/32> (A flow with same match and priority exists 
> on the target node)
> 2013-10-21 12:29:17.063 IST [SwitchEvent Thread] WARN 
> o.o.c.f.i.ForwardingRulesManager - Operation Rejected: A flow with 
> same match and priority exists on the target node
> 2013-10-21 12:29:17.063 IST [SwitchEvent Thread] WARN 
> o.o.c.f.i.ForwardingRulesManager - A flow with same match and priority 
> exists on the target node: FlowEntry[flowName = [192.168.1.54/32 
> <http://192.168.1.54/32> on N OF|00:00:00:04:9f:02:a3:e3], groupName = 
> 192.168.1.54/32 <http://192.168.1.54/32>, node = 
> OF|00:00:00:04:9f:02:a3:e3, flow = Flow[match = Match[[DL_TYPE(2048), 
> NW_DST(192.168.1.54)]], actions = 
> [OUTPUT[OF|1 at OF|00:00:00:04:9f:02:a3:e3]], priority = 1, id = 0, 
> idleTimeout = 0, hardTimeout = 0]]
> 2013-10-21 12:29:17.063 IST [SwitchEvent Thread] ERROR 
> o.o.c.s.s.i.SimpleForwardingImpl - Failed to install policy: 
> 192.168.1.54/32 <http://192.168.1.54/32> (A flow with same match and 
> priority exists on the target node)
>
>
> Configuration-
> PC-1----Ip=192.168.1.10
>            Gw=192.168.1.1
>
> PC-1----IP=192.168.1.54
>            Gw=192.168.1.1
>
>
> Opendaylight controller------Subnet gateway configuration=192.168.1.1,
> ports=eth1,eth2(OVS-1),eth1,eth2(OVS-2),eth1,eth4(OVS-3)
>
>
> Can you people help me regarding this?
>
> Thanks
>
> Regards..
> Abhishek Jain
>
>
> _______________________________________________
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> controller-dev at lists.opendaylight.org
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