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power stack has unbalanced power supplies

hi,

I am receiving the following error on 3750 stack switches. have already verified the power status and found ok.

IOS used: Cisco IOS Software, C3750E Software (C3750E-UNIVERSALK9-M), Version 12.2(55)SE3, RELEASE SOFTWARE (fc1)

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

211540: Jun 10 10:45:17.935 UTC: %PLATFORM_STACKPOWER-4-UNBALANCED_PS: Switch 4's power stack has unbalanced power supplies

211541: Jun 10 10:46:18.045 UTC: %PLATFORM_STACKPOWER-4-UNBALANCED_PS: Switch 4's power stack has unbalanced power supplies

211542: Jun 10 10:47:18.148 UTC: %PLATFORM_STACKPOWER-4-UNBALANCED_PS: Switch 4's power stack has unbalanced power supplies

3750-switch#sh env all

FAN 1 is OK

FAN 2 is OK

FAN PS-1 is OK

FAN PS-2 is OK

TEMPERATURE is OK

Temperature Value: 28 Degree Celsius

Temperature State: GREEN

Yellow Threshold : 46 Degree Celsius

Red Threshold    : 60 Degree Celsius

SW  PID                 Serial#     Status           Sys Pwr  PoE Pwr  Watts

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

1A  C3KX-PWR-1100WAC    LIT16391DUN  OK              Good     Good     1100/0

1B  C3KX-PWR-1100WAC    LIT160129MW  OK              Good     Good     1100/0

2A  C3KX-PWR-1100WAC    LIT16391DVJ  OK              Good     Good     1100/0

2B  C3KX-PWR-1100WAC    LIT16010268  OK              Good     Good     1100/0

3A  C3KX-PWR-1100WAC    LIT16391DT7  OK              Good     Good     1100/0

3B  C3KX-PWR-1100WAC    LIT160129LU  OK              Good     Good     1100/0

4A  C3KX-PWR-1100WAC    LIT16391DS1  OK              Good     Good     1100/0

4B  C3KX-PWR-1100WAC    LIT16010284  OK              Good     Good     1100/0

SW  Status          RPS Name          RPS Serial#  RPS Port#

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

1   Not Present     <>

2   Not Present     <>

3   Not Present     <>

4   Not Present     <>

3750-switch#sh switch

Switch/Stack Mac Address : 4403.a7cf.e880

                                           H/W   Current

Switch#  Role   Mac Address     Priority Version  State

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

*1       Master 4403.a7cf.e880     15     1       Ready              

2       Member 4403.a780.7d80     13     1       Ready              

3       Member 4403.a7c8.9080     11     1       Ready              

4       Member 4403.a748.8680     9      1       Ready              

3750-switch#sh stack-power

Power stack name: Powerstack-2

    Stack mode: Power sharing

    Stack topology: Ring

    Switch 1:

        Power budget: 1663

        Low port priority value: 22

        High port priority value: 13

        Switch priority value: 4

        Port 1 status: Connected

        Port 2 status: Connected

        Neighbor on port 1: 4403.a780.7d80

        Neighbor on port 2: 4403.a748.8680

    Switch 2:

        Power budget: 1663

        Low port priority value: 20

        High port priority value: 11

        Switch priority value: 2

        Port 1 status: Connected

        Port 2 status: Connected

        Neighbor on port 1: 4403.a7c8.9080

        Neighbor on port 2: 4403.a7cf.e880

    Switch 3:

        Power budget: 1663

        Low port priority value: 21

        High port priority value: 12

        Switch priority value: 3

        Port 1 status: Connected

        Port 2 status: Connected

        Neighbor on port 1: 4403.a748.8680

        Neighbor on port 2: 4403.a780.7d80

    Switch 4:

        Power budget: 1663

        Low port priority value: 19

        High port priority value: 10

        Switch priority value: 1

        Port 1 status: Connected

        Port 2 status: Connected

        Neighbor on port 1: 4403.a7cf.e880

        Neighbor on port 2: 4403.a7c8.9080

3750-switch#

CCIE 37523
1 Reply 1

Have tried the below given fix given by cisco on bug toolkit but it didnt work so final solution to problem is "UPGRADE THE IOS"

3750(config)#stack-power switch ?

  <1-9>  Switch number

3750(config)#stack-power switch 1

3750(config-switch-stackpower)#?

  standalone      Configure switch to not participate in power stack

3750(config-switch-stackpower)#standalone

!!! wait for 20 sec

3750(config-switch-stackpower)#NO standalone

CCIE 37523