catalyst 6500 power

we are having 2 new 6513's and 2 new 6509's, with 2 4000watt and 2

3000watt PSU's respectively.

Cisco state this:

All AC power supply inputs are fully isolated.

-Source AC can be out of phase between multiple power supplies in the same chassis, which means that PS1 can be operating from phase A and PS2 can be operating from phase B.

-Source AC can be out of phase between AC inputs on power supplies that are equipped with multiple AC inputs, which means that power cord

1 can be plugged into phase A and power cord 2 can be plugged into phase B.

But our installer (a major UK provider) recommend the following.

"Both power supplies in the same chassis need to be on the same phase, they can be fed from different PDUs and this is probably more resilient. But must be on the same phase otherwise strange things happen to the catalyst because of the harmonics."

Who's advice should we listen to?

Rgds, Big Si.

read more and respond »

Posted 5 years ago by simon.marsden in Cisco Systems

Report misuse