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Problems upgrading firmware via PCM2.2+

Bob Eadie
Occasional Visitor

Problems upgrading firmware via PCM2.2+

I have recently tried updating the firmware on several different switches, either one at a time or several at a time, either scheduled for overnight or immediately.
Some work OK but several now will not upgrade (e.g. 4208vl, 2524). If I look in the device log it shows
Firmware update: Updating and then perhaps 10 or 20 mins later
Firmware update: Error

I have checked 'Device Access - Test Communication Parameters in PCM' and all show success.

Any suggestions what to try next? (Of course I can always do a telnet and update via TFTP, but I've paid good money for PCM+ 2.2 exactly so I can do it the easy way!)

Bob