Thanks Abhi.
But POX STP is not the standard STP, so it would not help in interop.
"Note that this does not have much of a relationship to Spanning Tree
Protocol. They have similar purposes, but this is a rather different way
of going about it."
I guess, so far standard MSTP support is not available with any controller
and interop with traditional switch is not yet done.
I think, standard MSTP can be integrated with OpenFlow controller with
packet-in and packet-out as mentioned by Wes Felter with some modification
in flood mechanism (per Vlan port state lookup before flood) as explained
in my first post but it will not get OF spec support as basic 802.1D STP
flags and state given in OF spec will not help.
-Sudeep
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