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IOS Upgrade Problems

I have four 3200 controllers, one master and three local. They are all running and today I tried to upgrade them to After the code was upgraded and the controllers rebooted none of them would talk to the master. In addition I could no longer log in to the master controller. The AP's attached to the local controllers and I could get on the wireless network without and issue. I consoled into the master controller power cycled it and broke into the boot sequence. At the point I was able to reconfigure to boot off the other partition with I downgraded all the other controllers to the same version and now they can all speak to the master and I can login into it as well. Any idea what the issue is?
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Re: IOS Upgrade Problems

Do not know what the issue is, because there is not enough specific information. I would open a proactive case with Support when you have your next window so that they could guide you through your next upgrade attempt.

*Answers and views expressed by me on this forum are my own and not necessarily the position of Aruba Networks or Hewlett Packard Enterprise.*
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