Hi,

How about controller B periodically sends Port Statistics requests to switches? The reply of Port Statistics request contains the number of transmitted/received bytes. Controller B can also fetch port bitrate by Port Description requests/replies from switches.
You can calculate link utilization using these values.

(13/06/27 22:33), Farhad Ibrahim wrote:
Hello Folks,

Lets say i have two controllers active on the network. One is being used
by team A and the other by team B. Both these teams are using the same
physical infrastructure. Now lets say controller A (of team A) has
directed traffic towards link X. Link X is now being utilized for its
total available bandwidth. How would controller B then know that link X
is being fully utilized and thus not route on that link? Are the
controllers talking to each-other? And if so, how?

Thanks!


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--
Daisuke Kotani / kot...@net.ist.i.kyoto-u.ac.jp
Ph.D Student
Network Media Group,
Department of Intelligence Science and Technology,
Graduate School of Informatics, Kyoto University
http://www.ecchu.jp/~daisuke/

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