[c-nsp] Power Supply 2 ouput has dropped

Justin M. Streiner streiner at cluebyfour.org
Fri Jan 4 15:04:31 EST 2013


This has nothing to do with VSS.  I've seen this before, with a 6000 watt 
AC power supply in a 6509.  It turned out that one input on the power 
supply had gone bad.

I'm assuming you're powering this with two 208V or 240V circuits?  If so, 
it's also possible, but probably less likely that you lost one of the two 
hot legs on the affected input.  If you have a voltage tester (or an 
electrician who has one) you can test if you're getting ~120V from each of 
the hot legs to ground, and ~208/240V from leg to leg.  If you are, and 
you're testing from the inlet at the end of the cord that plugs into the 
power supply, then the circuit and cord are good, and you'll likely need 
to replace the power supply.

If you have a spare 6000W AC power supply, you can also try swapping it 
out.  If the problem goes away, then the power supply is definitely bad.

jms

On Sat, 5 Jan 2013, Farooq Razzaque wrote:

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> Hi
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> I m getting the following power supply error frequently on 6513 switches operating in VSS mode. It seems to be the issue with the input of power supply 2.
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> Below are the ouput of the show environment and show power .
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> Anyone has experience this before
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> 83559233: Dec 12 09:37:55.985 UAE: vs_raised_alarm_to_cardstate(): NULL threshold info for switch 1 power-supply 2 power-output-mode violation
> 83559234: Dec 12 09:37:55.949 UAE: %C6KPWR-SW1_SP-4-PSOUTPUTDROP: Power supply 2 output has dropped
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> 83559235: Dec 12 09:37:55.949 UAE:
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> %C6KPWR-SW1_SP-4-INPUTCHANGE: Power supply 2 input has changed. Power capacity adjusted to 2671.20W
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> 83559236: Dec 12 09:37:55.989 UAE: %C6KPWR-SW1_SP-4-PSREDUNDANTMISMATCH: power supplies rated outputs do not match.
> 83559237: Dec 12 09:37:55.989 UAE: %C6KPWR-SW1_SP-4-PSNOREDUNDANCY: Power supplies are not in full redundancy, power usage exceeds lower capacity supply
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> ¡¡
> 83559238: Dec 12 09:37:57.997 UAE: %C6KPWR-SW1_SP-4-INPUTCHANGE: Power supply 2 input has changed. Power capacity adjusted to 5771.64W
> 83559239: Dec 12 09:37:58.001 UAE: %C6KPWR-SW1_SP-4-PSREDUNDANTBOTHSUPPLY: in power-redundancy mode, system is operating on both power supplies
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> 83559240: Dec 12 09:38:02.084 UAE: vs_raised_alarm_to_cardstate():  NULL threshold info for switch 1 power-supply 2 power-output-mode violation
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> 83559241: Dec 12 09:38:02.045 UAE: %C6KPWR-SW1_SP-4-PSOUTPUTDROP: Power supply 2 output has dropped
> 83559242: Dec 12 09:38:02.045 UAE: %C6KPWR-SW1_SP-4-INPUTCHANGE: Power supply 2 input has changed.  Power capacity adjusted to 2671.20W
> 83559243: Dec 12 09:38:02.089 UAE: %C6KPWR-SW1_SP-4-PSREDUNDANTMISMATCH: power supplies rated outputs do not match.
> 83559244: Dec 12 09:38:02.093 UAE: %C6KPWR-SW1_SP-4-PSNOREDUNDANCY: Power supplies are not in full redundancy, power usage exceeds lower capacity supply
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> 83559245: Dec 12 09:38:04.112 UAE: %C6KPWR-SW1_SP-4-INPUTCHANGE: Power supply 2 input has changed.  Power capacity adjusted to 5771.64W
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> 83559246: Dec 12 09:38:04.112 UAE: %C6KPWR-SW1_SP-4-PSREDUNDANTBOTHSUPPLY: in power-redundancy mode, system is operating on both power supplies.
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> SW01#  sh environment switch 1 status power-supply 2
> switch 1 power-supply 2:
>  switch 1 power-supply 2 fan-fail: OK
> switch 1 power-supply 2 power-input: AC low
>  switch 1 power-supply 2 power-output-mode: low
>  switch 1 power-supply 2 power-output-fail: OK
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> SW01#sh power system
> power redundancy mode = redundant
> system power redundancy operationally = non-redundant
> system power total = 5771.64 Watts (137.42 Amps @ 42V)
> system power used = 3451.56 Watts (82.18 Amps @ 42V)
> system power available = 2320.08 Watts (55.24 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
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> 2 WS-CAC-6000W 2671.20  63.60 OK OK on
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> SW01# sh environment switch 1 status power-supply 2
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> switch 1 power-supply 2 fan-fail: OKswitch 1 power-supply 2: fan-fail: OK
> switch 1 power-supply 2 power-input: AC high
> switch 1 power-supply 2 power-output-mode: high
> switch 1 power-supply 2 power-output-fail: OK
>
> ¡¡
> SW01#sh power
> system power redundancy mode = redundant
> system power total = 5771.64 Watts (137.42 Amps @ 42V)
> system power used = 3451.56 Watts (82.18 Amps @ 42V)
> system power available = 2320.08 Watts (55.24 Amps @ 42V)
> Power-Capacity PS-Fan Output Oper
> PS Type Watts A @42V Status Status State
> ---- ------------------ ------- ------ ------ ------ -----
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> 1 WS-CAC-6000W 5771.64 137.42 OK OK on
> 2 WS-CAC-6000W 5771.64 137.42 OK OK on
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