[c-nsp] Burned up 2790

[Tristan Gulyas]

Hi,

The newer hardware revisions on some of these switches use a different style of solid state capacitor which does not get affected by this "capacitor plague".

I've seen this on the 3750G switches hundreds of times.  Any we've RMA'd for the issue have been replaced with newer hardware revisions.  Mainly 3750G-24T, 12S and 24TS switches - the PoE and 24TS 1RU switches are unaffected as far as we can tell, along with the E and X series switches.

Re: 3750G-24TS failures, we've seen an issue where a switch is power cycled and the switch hangs, with the status lights all on but no life out of the device.  Power cycling it repeatedly can sometimes bring the device back to life temporarily (until the next power cycle).

Tristan

On 18/07/2011, at 1:54 AM, Alan Buxey wrote:

> Hi,
> 
>> 
>> You can mix & match 3750 boxes and stack up to 9 of them together into 
>> a virtual chassis.  The newer 3750X platform even has field replaceable 
>> parts. 
>> 
>> For your 2970, take a hard look at the capacitors.  They are of a vintage
>> when there was considerable problems across the industry:
>> http://en.wikipedia.org/wiki/Capacitor_plague
> 
> aye, 2970's die here quite regularly - particulrly after a power cut they just dont come back
> 
> we're migrating to 3750X and 3750E whereever they currently exist
> 
> alan
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