[c-nsp] 6509 power supply question

[Scott McGrath]

Jeff,

I've done this before but one of the power supplies was sufficient to 
run the chassis

What you need to do

1 - set the power to combined mode ( since the PS units will not match )
2 - remove one of the power supplies 110V cable
3 - install the 'new' power supply cable
4 - power it up and make sure it's online and recognized by the 
supervisor(s)
5 - repeat steps 2-4 for second PS
6 - set power back to redundant
7 - Enjoy all the new power in your chassis

Only risk here is if you lose power on the single supply powering the 
chassis during your window.  
We did this a lot during our upgrade program as initially each single 
6509 was distribution
for about 50 buildings on our campus we now have 2 at each 'core' and 
each building has  a feed
from each.   So for obvious reasons the no shutdown option was attactive 
to us.

- Scott




Jeff Kell wrote:
> On a somewhat related note... we have a 6509 that was "somehow" 
> originally wired for 110v, so we're only getting half the power rating 
> out of them.  I have new 220v mains, plugs, and cables ready... can they 
> be bumped over one at a time hot, or does it have to be down cold?
>
> Seems to be a similar issue -- you'll have two power supplies giving you 
> two different delivered power amounts in the same chassis. 
>
> Jeff
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