Problems between a Wireless Controller and a Switch.

I have a Wireless Controller 4402 connected to one sw2960G.
I configured the controller with LAG and the switch (sw2960G) with etherchanel.
I connected the controller 2 distribution ports to the 2 ports of the switch (configured with etherchanel).
It worked like it should work.
But the problem is like this: if I take one cable that is connected to the switch and unplugged that cable from the switch (if that cable is the one connected to controllers port one) I have connectivity between both machines.
If I plug in the switch the cable connected to controller port one and take the other cable and unplugged that cable from the switch I stop the connectivity between the two machines.
I think that was not supposed to happenâ¦ because the LAG in the controller should put every AP in the second controller's port, and the connectivity between the machines should not end.
Can any one help me?
Can any one tell me what I am doing wrong?
Thanks in advance,
Rui

With LAG enabled in the controller I think I can have only one ap-manager interface.
The LAG will (it is supposed to) do the load balance automatically.
I mean, if one of the interfaces is âdownâ the other will have to coupe with all the AP's.
I should have always connection between the controller and the switch.
The STP of the controller is configured by default (STP Mode = OFF).
In the case of etherchannel load balanceâ¦ I saw the Cisco documentation and I did not saw any thing about that. I think that The LAG as to do that for the controllerâ¦ I'm right about that?
I will see the link that you advisedâ¦
Can you help me?
Thanks,
Rui

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Fazlul Kabir Mahfuz wrote:
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