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Link Problem with port 2 in WLC 4402

Hi,

I have a problem with port 2 in Wireless Lan Controler 4402. The problem is that the distribution port 2 of the WLC not link with the switch (3750). We receive the WLC and we follow the autostart wizard and we enable LAG. The wizard finish, I restart the system and all works fine. The two distribution ports of WLC, 1 and 2 appears UP and the LAG works correctly. After this we upgrade the firmware of the WLC to the version AIR-WLC4400-k9-6-0-182-0.aes and we restart the system again but at this time port 2 does not link and port 1 link OK. We do not know the reason why port 2 doesn´t link? Could you help me ?

Thank in advance.

Regards.

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