[ovs-discuss] way to speak with OpenFlow module

[Minh Nghiem Gia]

Hi Xiao,

Thanks for your help.
It's just my curious about a special case where a OF switch is under
control of 2 or more controllers.

Best regards,
Minh.

2015-09-16 11:44 GMT+09:00 Xiao Liang (xiaolia) <xiaolia at cisco.com>:

> Hi Minh,
>
>
>
> Controller could query existing flows before adding. I’m not clear why you
> need to do this. Ovs-ofctl has no impact as long as you don’t use it. You
> can remove the mgmt socket (/var/run/openvswitch/<bridge>.mgmt) if you
> really want.
>
>
>
> Thanks,
>
> Xiao
>
>
>
> *From:* Minh Nghiem Gia [mailto:nghiem.gia.minh at gmail.com]
> *Sent:* Tuesday, September 15, 2015 22:04
> *To:* Xiao Liang (xiaolia)
> *Cc:* discuss at openvswitch.org
> *Subject:* Re: [ovs-discuss] way to speak with OpenFlow module
>
>
>
> Hi Xiao,
>
>
>
> Thank you for your quick response. That means there are several ways to
> insert OF flows! Then, if I insert OF rules by using ovs-ofctl and by a
> controller, is there any way to ensure installed rules are not overlap or
> interfere with the others? Or is there any way to only allow one way to
> communicate with the switch?
>
>
>
> Best regards,
>
> Minh.
>
>
>
> 2015-09-15 18:43 GMT+09:00 Xiao Liang (xiaolia) <xiaolia at cisco.com>:
>
> Hi Minh,
>
>
>
> As far as I know, most controllers will include OpenFlow protocol
> implementation. They communicate with switches by OpenFlow message. In this
> way, ovs-ofctl makes no difference, it sends / receives messages via
> sockets (unix, tcp, etc.). Some controller might also have OVSDB
> southbound, which manipulates OVS bridges as ovs-vsctl.
>
> Some applications (like Openstack, IIRC) might have an agent running on
> the host to call OVS utils.
>
>
>
> Thanks,
>
> Xiao
>
>
>
> *From:* discuss [mailto:discuss-bounces at openvswitch.org] *On Behalf Of *Minh
> Nghiem Gia
> *Sent:* Tuesday, September 15, 2015 16:43
> *To:* discuss at openvswitch.org
> *Subject:* [ovs-discuss] way to speak with OpenFlow module
>
>
>
> Hello,
>
>
>
> It is easy to push OpenFlow rules to OVS by using the OVS utility such
> as ovs-ofctl. Thanks all OVS developers!
>
> However, I now want to try that function with a SDN controller and I
> wonder that does the SDN controller (i.e., pox, nox or floodlight) will
> call ovs-ofctl to install OF flows or they implement their own way (which
> probably works in a similar way to ovs-ofctl) to complete that tasks?
>
> Anyone please help on my dummy question.
>
>
>
> Thanks a lot,
>
> Minh.
>
>
>
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