[ovs-discuss] Configuring in-band control

[André Mantas]

Yes, I did found that info in
https://github.com/openvswitch/ovs/blob/master/FAQ.md

The problem is, in an in-band scenario, will the messages to the
controllers *always* be processed by those hidden flows? And can I modify
such flows as I wish?

Pedro Maia <pmaia at lasige.di.fc.ul.pt> escreveu no dia quinta, 17/12/2015 às
14:09:

> No, in mininet by default each switch is “directly” connected to the
> controller.
> You configure a ip address at each switch in a interface that is also used
> to forward traffic, this way it will always have the “in-band behaviour”.
> When you do this openvswitch will create a few hidden flows with a higher
> priority that the controller can configure which you will able to see
> executing “ovs-appctl bridge/dump-flows s1”.
>
> Regards,
> Pedro
>
> On 17 Dec 2015, at 13:26, André Mantas <andremantas7 at gmail.com> wrote:
>
> Hi.
>
> I thought in-band was default in mininet topologies?
>
> Anyway, sometimes OvS processes control messages using ingress tables
> <http://openvswitch.org/pipermail/discuss/2015-December/019580.html> in
> "in-band" environments, and it can be configured to always have this
> behavior
> <http://openvswitch.org/pipermail/discuss/2015-December/019582.html>. I
> wanted to know how to make this configuration.
>
> Thanks for your help.
>
> Pedro Maia <pmaia at lasige.di.fc.ul.pt> escreveu no dia quinta, 17/12/2015
> às 10:51:
>
>> Hi Andre,
>>
>> An in-band controller just means that it sits in the “middle” of the
>> network connected to a given switch. This way when some switch sends a
>> packet in it uses the link it normally uses to forward traffic.
>> If you want to emulate it using mininet there are a few examples just
>> look for "in-band controller mininet”, for example
>> http://techandtrains.com/2013/10/04/in-band-controller-with-mininet/ .
>> The important thing is to give each switch a ip address and then run the
>> controller in a mininet host.
>>
>> Regards,
>> Pedro
>> > On 17 Dec 2015, at 10:23, André Mantas <andremantas7 at gmail.com> wrote:
>> >
>> > Hi all.
>> >
>> > I want to configure in-band control so that specific controller-switch
>> messages (i.e., barrier reply, bundle commit reply) are processed by the
>> ingress tables instead of being forwarded through the switch's controller
>> port.
>> >
>> > Is there any documentation on how to configure in-band control?
>> >
>> > Thanks in advance.
>> > _______________________________________________
>> > discuss mailing list
>> > discuss at openvswitch.org
>> > http://openvswitch.org/mailman/listinfo/discuss
>>
>>
>
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