Upgrading 4400

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Aug 21st, 2008
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I consider upgrading the software on our 4400 from 5.0.148 to 5.1.151, but when I look in the help on Downloading file to the controller, it says:

"The controller downloads and installs the new controller Operating System software. This process takes at least three minutes and overwrites your existing code and configuration."

Is this correct, that it overwrites the current configuration?

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ahmedalshami Fri, 08/22/2008 - 00:31
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its correct but always take backup for your configuration before upgrading your Network equipments


Richard Atkin Fri, 08/22/2008 - 02:09
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The controller will change the config so it is suitable for the new code (allowing syntax changes, new commands, etc...) When you controller has rebooted, it will still do what it used to, it won't lose WLAN configs, IP addressing, etc...

When upgrading code, also remember that the APs will need to download their new code too, which takes about 3mins, and the controller can upgrade 10APs at a time. Therefore;

Total outage = Controller Outage + AP Outage

So if you have a hundred APs, the total time before the last AP returns to service is..

3.5 + (3 x [100/10]) = 33.5mins




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