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C3750X power stack

orielrose2011
Level 1
Level 1

Hi Guys

I am trying to build a C3750X power stack however just come to know that only 4 switches can be power stacked in ring topology.

I have 6 switches in stack is it possible to have two power stacks within the one stack of 6 switches ?

4 Accepted Solutions

Accepted Solutions

rmcarthur
Level 1
Level 1

Hi Oriel, yes, you can either use the expandable power system to make a single power stack of 6 or have 2 power stacks of 3 within a single data stack.

From

http://www.cisco.com/en/US/prod/collateral/switches/ps5718/ps6406/qa_c67-578933_ps10744_Products_Q_and_A_Item.html

Q. How many Cisco StackPower stacks can be built within one data stack?

A. ...... Another option is to build 3 Cisco Stackpower stacks of three each.

HTH

View solution in original post

Hi Oriel, your stack ports are currently shut, you will need to enable them to bring the powerstack up.

Issue the following command from SW1# prompt "stack-power switch port 1 enable" where is the switch number.

View solution in original post

Hi Oriel, issue the command from the priv exec, not config mode.

SW1#stack-power switch 1 port 1 enable

not SW1(config)#

View solution in original post

Hi Oriel, glad to hear it's now working for you.

I think that you will have to do the math to work out if your power is under-budget (add the switch power budgets and substract from available PSUs), in practice you would see a console message warning that you were below budget.

Here is a useful link for understanding and calculating power budgets.

http://www.cisco.com/en/US/prod/collateral/switches/ps5718/ps10745/white_paper_c11-663717.html

Please rate helpful posts and mark them as answered to help others find a solution to similar problems.

Thanks and good luck!

View solution in original post

10 Replies 10

rmcarthur
Level 1
Level 1

Hi Oriel, yes, you can either use the expandable power system to make a single power stack of 6 or have 2 power stacks of 3 within a single data stack.

From

http://www.cisco.com/en/US/prod/collateral/switches/ps5718/ps6406/qa_c67-578933_ps10744_Products_Q_and_A_Item.html

Q. How many Cisco StackPower stacks can be built within one data stack?

A. ...... Another option is to build 3 Cisco Stackpower stacks of three each.

HTH

okay

i cant see the neighbors with this configuration

stack-power stack power1

stack-power stack mypower

stack-power stack mypower1

!

stack-power switch 1

stack mypower

stack-power switch 2

stack mypower

stack-power switch 3

stack mypower

stack-power switch 4

stack mypower1

stack-power switch 5

stack mypower1

stack-power switch 6

stack mypower1

SW1#sh stack-power

Power stack name: mypower-1

    Stack mode: Power sharing strict

    Stack topology: Standalone

    Switch 1:

        Power budget: 1663

        Low port priority value: 22

        High port priority value: 13

        Switch priority value: 4

        Port 1 status: Shut

        Port 2 status: Shut

        Neighbor on port 1: 0000.0000.0000

        Neighbor on port 2: 0000.0000.0000

Power stack name: mypower1

    Stack mode: Power sharing

    Stack topology: Standalone

    Switch 6:

        Power budget: 1663

        Low port priority value: 22

        High port priority value: 13

        Switch priority value: 4

        Port 1 status: Shut

        Port 2 status: Shut

        Neighbor on port 1: 0000.0000.0000

        Neighbor on port 2: 0000.0000.0000

Power stack name: mypower1-4

    Stack mode: Power sharing strict

    Stack topology: Standalone

    Switch 4:

        Power budget: 1663

        Low port priority value: 22

        High port priority value: 13

        Switch priority value: 4

        Port 1 status: Shut

        Port 2 status: Shut

        Neighbor on port 1: 0000.0000.0000

        Neighbor on port 2: 0000.0000.0000

Power stack name: mypower1-5

    Stack mode: Power sharing strict

    Stack topology: Standalone

    Switch 5:

        Power budget: 1663

        Low port priority value: 22

        High port priority value: 13

        Switch priority value: 4

        Port 1 status: Shut

        Port 2 status: Shut

        Neighbor on port 1: 0000.0000.0000

        Neighbor on port 2: 0000.0000.0000

Power stack name: mypower

    Stack mode: Power sharing

    Stack topology: Standalone

    Switch 2:

        Power budget: 1663

        Low port priority value: 22

        High port priority value: 13

        Switch priority value: 4

        Port 1 status: Shut

        Port 2 status: Shut

        Neighbor on port 1: 0000.0000.0000

        Neighbor on port 2: 0000.0000.0000

why its showing

     Port 1 status: Shut

        Port 2 status: Shut

How i can no shut those ports ?

Hi Oriel, your stack ports are currently shut, you will need to enable them to bring the powerstack up.

Issue the following command from SW1# prompt "stack-power switch port 1 enable" where is the switch number.

Cisco IOS Software, C3750E Software (C3750E-IPBASEK9-M), Version 15.0(1)SE, RELE

ASE SOFTWARE (fc1)

Technical Support: http://www.cisco.com/techsupport

Copyright (c) 1986-2011 by Cisco Systems, Inc.

Compiled Wed 20-Jul-11 09:09 by prod_rel_team

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

SW1(config)#stack-power switch 4 ?

 

SW1(config)#stack-power switch 4

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

SW1(config-switch-stackpower)#?

Switch stack power configuration mode:

  default         Set a command to its defaults

  exit            Exit from switch stack power configuration

  no              Negate a command or set its defaults

  power-priority  Switch's port priority

  stack           Switch's power stack

  standalone      Configure switch to not participate in power stack

i cant see this command...

Hi Oriel, issue the command from the priv exec, not config mode.

SW1#stack-power switch 1 port 1 enable

not SW1(config)#

Yes it worked

thanks

let me see the result and will update you shortly

Thats great you are an absolute star.

Just one more question please, how i can find out if my system is running in ngative budget. Right now i have got power-stack of 3 switches and only 1 power supply is connected...

Power stack name: mypower1-5

    Stack mode: Power sharing

    Stack topology: Ring

    Switch 6:

        Power budget: 343

        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:

        Neighbor on port 2:

    Switch 5:

        Power budget: 373

        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:

        Neighbor on port 2:

    Switch 4:

        Power budget: 343

        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:

        Neighbor on port 2:

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

SW1#show env power all

SW  PID                 Serial#     Status           Sys Pwr  PoE Pwr  Watts

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

1A  C3KX-PWR-1100WAC    LIT12120W14 OK              Good     Good     1100/0

1B  C3KX-PWR-1100WAC    LIT13509648 OK              Good     Good     1100/0

2A  C3KX-PWR-1100WAC    LIT16511011 OK              Good     Good     1100/0

2B  C3KX-PWR-1100WAC    LIT145015KA OK              Good     Good     1100/0

4A  C3KX-PWR-1100WAC    LIT12280KGL OK              Good     Good     1100/0

4B  C3KX-PWR-1100WAC    LIT14232163R No Input Power  Bad      N/A      1100/0

5A  C3KX-PWR-1100WAC    LIT144232KUF No Input Power  Bad      N/A      1100/0

5B  C3KX-PWR-1100WAC    LIT14511142P No Input Power  Bad      N/A      1100/0

6A  C3KX-PWR-1100WAC    LIT14523125Q No Input Power  Bad      N/A      1100/0

6B  C3KX-PWR-1100WAC    LIT14481231T  No Input Power  Bad      N/A      1100/0

Hi Oriel, glad to hear it's now working for you.

I think that you will have to do the math to work out if your power is under-budget (add the switch power budgets and substract from available PSUs), in practice you would see a console message warning that you were below budget.

Here is a useful link for understanding and calculating power budgets.

http://www.cisco.com/en/US/prod/collateral/switches/ps5718/ps10745/white_paper_c11-663717.html

Please rate helpful posts and mark them as answered to help others find a solution to similar problems.

Thanks and good luck!

Thanks a lottttttttt for all your helo

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