[email protected] wrote:
I'm getting ready to install some RPS 675's in order to dual cord some
3750's and ran across this in the manual:
"Do not use different power sources to power up the RPS and the connected
device. If you connect to separate AC power sources, reset conditions might
occur."
Huh? My intent is to plug the RPS into a different PDU than the actual
switches so that the switches can stay online in the event of a power
failure on their primary circuit. Is this Cisco FUD or are there good
reasons I wouldn't want to plug an RPS into a different circuit than the
connected switches?
The only possible problem that I can foresee is the potential to create
a ground loop. That wouldn't be good. The RPSs are only meant to
protect against a power supply failure, not a power source failure.
That said, I use a RPS 675 in the same way that you're describing
without any problems.
Also, remember that the RPS 675 can only keep 1 connected device powered
up in the event of a power failure. The RPS 2300 can do 2. Ie, if you
have a stack of 4 switches with 2 connected to circuit A, 2 connected to
circuit B, the RPS connected to circuit C (with all 4 switches connected
to that RPS) and circuit B fails, only 1 of the 2 switches connected to
circuit B will get power from the RPS. The other will be dead in the water.
Justin
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