[ovs-discuss] Connecting OpenVswitch and a NOX controller present on the same machine

Justin Pettit jpettit at nicira.com
Fri May 4 06:05:23 UTC 2012


I'd recommend asking on the nox-dev mailing list, since that will have a more appropriate audience.

--Justin


On May 3, 2012, at 10:24 PM, Anisha Kolasani wrote:

> Is there any way I could find out why the controller might be rejecting the connection? I would appreciate if somebody could give a suggestion.
> 
>  Thank you,
> Anisha.
> 
> 
> 
> 
> On Fri, May 4, 2012 at 12:05 AM, Justin Pettit <jpettit at nicira.com> wrote:
> It looks like your controller is refusing the connection, since your tcpdump output shows a reset [R] to the connection request. 
> 
> --Justin
> 
> 
> On May 3, 2012, at 5:39 PM, Anisha Kolasani <akolasan at cse.unl.edu> wrote:
> 
>> 
>> Some lines from the OVS log file are showing:
>> 
>> OVS log file:
>> 
>> May 03 16:40:45|231992|rconn|DBG|br0<->tcp:127.0.0.1:6633: entering BACKOFF
>> May 03 16:40:53|232147|rconn|WARN|br0<->tcp:127.0.0.1:6633: connection failed (Connection refused)
>> 
>> May 03 18:46:41|00109|rconn|INFO|br0<->tcp:127.0.0.1:6633: waiting 1 seconds before reconnect
>> May 03 18:46:41|00110|rconn|DBG|br0<->tcp:127.0.0.1:6633: entering BACKOFF
>> May 03 18:46:41|00111|connmgr|WARN|br0: unsupported controller "--out-of-band"
>> 
>>  When I saw the tcpdump on lo, there were requests passing with the controller:
>> 
>> localhost.50703 > localhost.6633: Flags [S], cksum 0xfe30 (incorrect -> 0x302d), seq 266318493, win 32792, options [mss 16396,sackOK,TS val 4046000 ecr 0,nop,wscale 4], length 0
>> 17:35:04.516841 IP (tos 0x0, ttl 64, id 0, offset 0, flags [DF], proto TCP (6), length 40)
>>     localhost.6633 > localhost.50703: Flags [R.], cksum 0x0f58 (correct), seq 0, ack 266318494, win 0, length 0
>> 17:35:12.518817 IP (tos 0x0, ttl 64, id 53647, offset 0, flags [DF], proto TCP (6), length 60)
>> 
>> 
>> How can the OVS be configured in --out-of-band control mode? Are there any documents I could refer too..?
>> I tried using 'ovs-openflowd' to set controller to the swithch.. but there was not command like that. Any pointers regarding this?
>> 
>> Thank you,
>> Anisha.
>> 
>> 
>> 
>> On Thu, May 3, 2012 at 4:51 PM, Ben Pfaff <blp at nicira.com> wrote:
>> On Thu, May 03, 2012 at 04:44:56PM -0500, Anisha Kolasani wrote:
>> > My system settings are:
>> >
>> > *sudo ovs-vsctl show*
>> > 12681540-b7fe-4f22-8c25-8371ae195eb5
>> >     Bridge "br0"
>> >         Controller "tcp:127.0.0.1:6633"
>> >         fail_mode: standalone
>> >         Port "eth0"
>> >             Interface "eth0"
>> >         Port "br0"
>> >             Interface "br0"
>> >                 type: internal
>> >         Port "tap0"
>> >             Interface "tap0"
>> >         Port "tap1"
>> >             Interface "tap1"
>> >
>> >
>> > There are no flows that I can see..
>> > *sudo ovs-ofctl dump-flows br0*
>> > NXST_FLOW reply (xid=0x4):
>> >
>> >
>> > I am running the controller at the port 6633 in the same machine...But, the
>> > following two are the only two message I see when the controller starts:
>> >
>> > *sudo ./nox_core -v -i ptcp:6633 pyswitch*
>> > 00001|nox|INFO:Starting nox_core
>> > (/home/anisha/nox/build/src/.libs/lt-nox_core)
>> > 00002|nox|INFO:nox bootstrap complete
>> >
>> > I am not sure why the bridge br0 is not able to connect to the Nox
>> > controller.
>> > If anybody has tried this before, could you please let me know any pointers
>> > to as to where its going wrong?
>> 
>> You should probably configure OVS for out-of-band control.
>> 
>> But what's in the OVS log?
>> 
>> _______________________________________________
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>> http://openvswitch.org/mailman/listinfo/discuss
> 
> 




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