No, every switch does not need to be directly connected to a
controller.  You can do one of two things:

1) run a separate management network, using the switch's native
firmware (e.g., spanning tree, mac address learning) to connect to the
controller
2) run in-band control, which is some approximation of static
switching rules and mac address learning

If you want more info on either, I would recommend doing some searches
on the list archives.

- Rob
.



On Tue, Jun 14, 2011 at 12:35 PM, Alexey Bogaevskiy <[email protected]> wrote:
> I was wondering if every switch has to be directly connected to a
> controller? I have tried to do a chain link, but I can't seem to be able to
> see the neighboring switch, or I am guessing I can remove one of the
> openflow interfaces to connect the two switches, and then relay the
> connection to the controller statically?
> -Alex
> _______________________________________________
> openflow-discuss mailing list
> [email protected]
> https://mailman.stanford.edu/mailman/listinfo/openflow-discuss
>
>
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