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Cisco WLC 2504 LAG Problem - Controller is shutting down when all four ports are connected

Hi all,

I'm struggeling on a very strange phenomen.

One customer of mine is using a Cisco WLC 2504 controller (AirOS Version 8.2.100.0) connected to a HP switch (I don't know the type of model).

LAG is configured correctly as per configuration guide but it is only working as long as only two out of the four ports are connected.

As soon as port 3 and 4 are plugged in the WLC is not reacting anymore and reboots. There is nothing visible in the show msglog output or traplog output as well as there is no crashinfo available so it seems like a silent crash. However also when having a console cable connected to the WLC nothing is visible.

We have already replaced the WLC but without success.

Any ideas what could cause this?

Regards,

Christian

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