6000W power supply limited to 2940 watts only

[gautamzone]

Dear friends,

Does anyone know of the cause of this message "PS2 capacity is limited to 2940.00"?. I am seeing that the power supply LED's are green but i am still getting this message.

The switch in question is WS-C6509 (not the E chassis) running IOS 12.2(33)SXH3.

H-6509-Dist1#sh power

system power redundancy mode = redundant

system power total = 3780.00 Watts (90.00 Amps @ 42V)

system power used = 2003.40 Watts (47.70 Amps @ 42V)

system power available = 1776.60 Watts (42.30 Amps @ 42V)

Power-Capacity PS-Fan Output Oper

PS Type Watts A @42V Status Status State

---- ------------------ ------- ------ ------ ------ -----

1 WS-CAC-6000W 5771.64 137.42 OK OK on

2 WS-CAC-6000W 5771.64 137.42 OK OK on

Note: PS2 capacity is limited to 2940.00 Watts (70.00 Amps @ 42V)

when PS1 is not present

Pwr-Requested Pwr-Allocated Admin Oper

Slot Card-Type Watts A @42V Watts A @42V State State

---- ------------------ ------- ------ ------- ------ ----- -----

1 WS-X6704-10GE 295.26 7.03 295.26 7.03 on on

2 WS-X6708-10GE 444.36 10.58 444.36 10.58 on on

3 WS-X6708-10GE 444.36 10.58 444.36 10.58 on on

5 WS-SUP720-3B 282.24 6.72 282.24 6.72 on on

6 (Redundant Sup) - - 282.24 6.72 - -

9 WS-X6748-SFP 254.94 6.07 254.94 6.07 on on

Thanks a lot

Gautam

[glen.grant]

You are probably running 120 volt power versus 240 volt which would give you full wattage .

[gautamzone]

Dear Glen,

We are in Qatar and running 240V. Is this a limitation of the AC power being supplied or the power supply itself?

If its power supply itself, then what is the suggested step in this case?

Thanks a lot

Gautam

[legerity1_2 · Accepted solution]

Guatam - check this out:

http://www.cisco.com/en/US/docs/switches/lan/catalyst6500/hardware/Chassis_Installation/Cat6500/0apwsply.html#wp1071292

This gives you the details you need. The 6000W PS is limited to 4000W in the 6509 non-e chassis.

To address the note, you can find that info on the same page, at the foot of table A-27:

http://www.cisco.com/en/US/docs/switches/lan/catalyst6500/hardware/Chassis_Installation/Cat6500/0apwsply.html#wp1030075

"When running redundant 4000 W, 6000 W, or 8700 W power supplies in Catalyst 6506 and Catalyst 6509 non-E series systems, if you remove the power supply in bay 1, the total system power will be reduced to 2940 W (70 A at 42 VDC) after 180 seconds (3 minutes). You can avoid this reduction in the total system power by leaving the power supply in bay 1, even in a powered down state."

HTH,

Geoff

[gautamzone]

Thanks a lot Geoff for your wonderful answer which was very helpful