Two wism module in vss mode

Question

i have two switches 6509 connected by vss technology
i add two wism module ( one in each switch 6509 )
i need to know if  two wism are operate active - active in vss or active - standby ?

Answer 1

Hi Mohammad,
Redundancy for the APs is achieved by configuring primary, secondary and tertiary controllers.
There is no redundancy between controllers in a way that one controller is in standby mode and keeps verifying whether another active controller is operational.
In your case, you could for example consider the following options:
N + N redundancy:
150 APs with primary controller A and secondary controller D for example.
150 APs with primary controller C and secondary controller B for example.
This will allow an easier redundancy configuration.
(pseudo) N + 1 redundancy:
100 APs with primary controller A; 50 of them with secondary controller C and other 50 with secondary controller D.
100 APs with primary controller B and secondary controller D.
100 APs with primary controller C; 50 of them with secondary controller A and other 50 with secondary controller B.
This is a bit trickier, but it would allow less load per controller and still a fairly robust redundancy in case one of the two Cat6k's goes down.
Regards,
Fede
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