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Power Redundancy problem for cisco 3750 stack switches

Unanswered Question
Aug 13th, 2012
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Hi Team,


I have installed and configured cisco 3750X series switches in stackwise. Those are having dual power supply.

Power redundancy test performed:

1. Removed one of the power supply and inserted it back.

2. once the first power supply is ready, removed another power supply and switch got rebooted.


please find the below stack-power output:


JP2-RDC-DIS-02#sh stack-power detail

Power Stack           Stack   Stack    Total   Rsvd    Alloc   Unused  Num  Num

Name                  Mode    Topolgy  Pwr(W)  Pwr(W)  Pwr(W)  Pwr(W)  SW   PS

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

Powerstack-2          SP-PS   Stndaln  700     477     223     0       1    2

Powerstack-1          SP-PS   Stndaln  700     477     223     0       1    2


Power stack name: Powerstack-2

    Stack mode: Power sharing

    Stack topology: Standalone

    Switch 2:

        Power budget: 223

        Power allocated: 223

        Low port priority value: 22

        High port priority value: 13

        Switch priority value: 4

        Port 1 status: Not connected

        Port 2 status: Not connected

        Neighbor on port 1: 0000.0000.0000

        Neighbor on port 2: 0000.0000.0000


Power stack name: Powerstack-1

    Stack mode: Power sharing

    Stack topology: Standalone

    Switch 1:

        Power budget: 223

        Power allocated: 223

        Low port priority value: 22

        High port priority value: 13

        Switch priority value: 4

        Port 1 status: Not connected

        Port 2 status: Not connected

        Neighbor on port 1: 0000.0000.0000

        Neighbor on port 2: 0000.0000.0000


Can anyone help what went wrong here?


Thanks

Manish

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Leo Laohoo Mon, 08/13/2012 - 23:59
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Stack topology: Standalone

Never tried this before but this could be it.

manish_3191 Tue, 08/14/2012 - 00:24
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I have checked the other stack where power redundancy is working fine and it has stack topology:standalone only. But it has stack mode: Power Sharing strict thats the difference.

Really Wierd!!!

ptierce Mon, 11/05/2012 - 07:43
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I had the same thing happen when installing a new stack.  One of the switches went into "Standalone" mode.  All you have to do to get it back into the powerstack is do the following:


conf t

stack-power switch x

  no standalone

end


Remember you'll have to manually assign all of the switches in the stack to a Powerstack because the default that it does to a large stack (> 4) isn't what you'll probably want.... as you saw.

John Capobianco Wed, 02/19/2014 - 07:26
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Cosmetic bug


CSCui21029    3750X Stack no standalone stays in running configureation as standalone

Symptom:

When you are configuring a 3750x stack and initially putting it into a stack ring topology by configuring the following.


Switch(config)#stack-power switch 1

Switch(config-switch-stackpower)#sta

Switch(config-switch-stackpower)#no stan

Switch(config-switch-stackpower)#no standalone


You will see that in the running configuration it shows up as standalone mode


stack-power switch 1

switch mode: standalone

stack-power switch 2

switch mode: standalone

Conditions:

3750X stacks with any license level


Workaround:

none

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