[ovs-discuss] way to speak with OpenFlow module

Minh Nghiem Gia nghiem.gia.minh at gmail.com
Tue Sep 15 14:04:08 UTC 2015


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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