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6509 PSU Query

Hello All,

I got the following message when I did a SHOW POWER on our 6509:

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

when PS1 is not present"

The PSUs are running in redundant mode.

Is this something I should worry about?

ukcap04-133-c65-ios#show power

system power redundancy mode = redundant

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

system power used = 1215.48 Watts (28.94 Amps @ 42V)

system power available = 2564.52 Watts (61.06 Amps @ 42V)

Power-Capacity PS-Fan Output Oper

PS Type Watts A @42V Status Status State

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

1 WS-CAC-4000W-INT 3795.12 90.36 OK OK on

2 WS-CAC-4000W-INT 3795.12 90.36 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

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

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

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

8 WS-X6748-GE-TX 325.50 7.75 325.50 7.75 on on

9 WS-X6748-GE-TX 325.50 7.75 325.50 7.75 on on

1 ACCEPTED SOLUTION

Accepted Solutions
Silver

Re: 6509 PSU Query

If you have 2 x 4000W and the power supply in bay #1 goes down, then the 4000W PSU in bay #2 will NOT be able to drive the full 4000W power - rather it will be limited to about 3000W. I dont know the exact

engineering reasons behind this but do know that this is not a bug and it is doing the right thing. Note the line in the output below which

highlights this...

PS Type Watts A @42V Status Status State

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

2 WS-CAC-4000W-INT 3795.12 90.36 - - off

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

when PS1 is not present*

thanks

Salman Z.

2 REPLIES
Bronze

Re: 6509 PSU Query

Yes, this is the correct behavior of the router only.No need to worry about this.This is due to the limitation of the chassis (not power supply) New E-series chasses have higher power limit.

Silver

Re: 6509 PSU Query

If you have 2 x 4000W and the power supply in bay #1 goes down, then the 4000W PSU in bay #2 will NOT be able to drive the full 4000W power - rather it will be limited to about 3000W. I dont know the exact

engineering reasons behind this but do know that this is not a bug and it is doing the right thing. Note the line in the output below which

highlights this...

PS Type Watts A @42V Status Status State

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

2 WS-CAC-4000W-INT 3795.12 90.36 - - off

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

when PS1 is not present*

thanks

Salman Z.

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