[pox-dev] Install actions to indirectly connected switches

[Lucas Brasilino]

Hi Ayush,

Since controller connects to switch using a TCP session, if S1 acts like a
learning switch or already has rules on its flow table
allowing TCP connections from C0 to S2, C0 will control S2.

Just be aware that if S1 is an OF switch and those rules mentioned above
expires, you will lost control over S2, even for a while.
What I mean is that until you restore S1 rules, some switch-to-controller
messages like 'Packet In', 'Port Status', 'FlowRemoved' and
so forth can be lost, leading for a network's state mismatch.

-- 
Att
Lucas Brasilino
MSc Student @ Federal University of Pernambuco (UFPE) / Brazil
twitter: @lucas_brasilino



2015-04-22 0:10 GMT-03:00 Ayush Dusia <adusia at udel.edu>:

> Hello Everyone,
>
> I have a question regarding installation of actions in switches.
>
> If I assume that a controller does not have direct connections to all the
> switches in a network. In that case how can a controller install actions in
> a switch to which it is not directly connected?
>
> e.g. for a topology like: C0 - S1 - S2
>
> How can C0 install actions in S2 through S1?
>
> Thanks,
> Ayush
>
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