LAG for two WLC 4400

Unanswered Question
Apr 9th, 2010

Hello  everyone,
I installed for a client two  WLC4400 (one is used for redundancy).

I wish I could make the aggregate links between these two  controllers to spread the load.

In this configuration, there won't be primary and secondary controllers,

APs  will be associated with one or the other WLC when they will be

discovered and by the number of AP on each controller.

Is this configuration possible?

And how to do that?

Thank you in advance,


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jhedstr2 Fri, 04/09/2010 - 06:23


You don’t need aggregate links between the two controller to balance the load. Just let the access points discover both controllers and they will take care of the load balancing. The AP collects all information about the controllers they found during the discovery, and then choose the controller with the leased load. And, make sure that you don't configure primary and secundary controller on the APs, they will only load balance if they don't have this configured.


adeline.fradin Fri, 04/09/2010 - 06:46

Oh yes, i'm sorry, the load balancing is already functionning.

But what I would like is to know how to configure the WLCs

in order to support more the 48 AP like this is the case now.

Because if one of the 2 controllers fail for, now, the other won't be able to support all of my AP...

I seen something about that in the documention, I'll have a look but, if you can explain me in others words...

Do we need to change the configuration or simply add an second cable?




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