3750-X StackPower-Problem

[Karsten Iwen]

Hi all,

I have a problem with a stack of four 3750-X (IPBase, 12.2(55)SE3)

Scenario:

- Sw1 and Sw2 form a power-ring

- Sw3 and Sw4 form a power-ring

- only Sw2 has an additionnal PS

The only power-config I have is the following:

stack-power stack power1

mode redundant

!

stack-power switch 2

stack power1

stack-power switch 1

stack power1

Every minute I get the following log-message:

Jul  6 13:47:47 CEST: %PLATFORM_STACKPOWER-4-PRIO_CONFLICT: Switch 1's power stack has conflicting power priorities

The Message-guide didn't help me any further ...

http://www.cisco.com/en/US/partner/docs/switches/lan/catalyst3750x_3560x/software/release/12.2_55_se/system/message/msg_desc.html#wp1124977

Any idea what can cause these messages?

[Ivan Shirshin]

Hi,

This message indicates there are two sets of devices (either a switch or a set of PDs) within the same power stack that have the SAME priority level (1 - 27).  If you saw this once, it's likely it just occurred while you were configuring their priorities.

Please check the priorities first and share the outputs of "show stack-power" and "show env all". If there are matching, then you need to change that. e.g.:

     Switch(config)#Stack-power switch 4
     Power-priority high 11
     Power-priority low 23
     power-prority switch 5 
http://www.cisco.com/en/US/docs/switches/lan/catalyst3750x_3560x/software/release/12.2_55_se/configuration/guide/swstkpwr.html#wp1016452
 

If it is continually happening even the output of "show stack-power" shows there are different, then there is chance you hit CSCtg20513. You can either upgrade the IOS or apply a workaround:

     - toggle the stack ports (shut/no shut) on the unit that is incorrectly reporting this error.

          config t

               stack-power switch

               standalone

               no standalone

Kind Regards,
Ivan

**Please grade this post if you find it useful.

[Karsten Iwen]

the toggling of the ports didn't help. The priorities are all different:

sw-ham1-core-01#show stack-p

Power stack name: power1

    Stack mode: Redundant

    Stack topology: Ring

    Switch 2:

        Power budget: 223

        Low port priority value: 20

        High port priority value: 12

        Switch priority value: 2

        Port 1 status: Connected

        Port 2 status: Connected

        Neighbor on port 1: c464.13a0.9780

        Neighbor on port 2: c464.13a0.9780

    Switch 1:

        Power budget: 223

        Low port priority value: 21

        High port priority value: 12

        Switch priority value: 5

        Port 1 status: Connected

        Port 2 status: Connected

        Neighbor on port 1: c464.13a0.b600

        Neighbor on port 2: c464.13a0.b600

Power stack name: Powerstack-3

    Stack mode: Power sharing

    Stack topology: Ring

    Switch 4:

        Power budget: 190

        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: 503d.e5c8.0d80

        Neighbor on port 2: 503d.e5c8.0d80

    Switch 3:

        Power budget: 190

        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: 503d.e5c8.1f00

        Neighbor on port 2: 503d.e5c8.1f00

sw-ham1-core-01#sh env a

FAN 1 is OK

FAN 2 is OK

FAN PS-1 is OK

FAN PS-2 is NOT PRESENT

TEMPERATURE is OK

Temperature Value: 29 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-350WAC     LIT154009G8  OK              Good     Good     350/0

1B  Not Present      

2A  C3KX-PWR-350WAC     LIT154100KM  OK              Good     Good     350/0

2B  C3KX-PWR-715WAC     LIT154314Z1  OK              Good     Good     715/0

3A  C3KX-PWR-350WAC     LIT145108RW  OK              Good     Good     350/0

3B  Not Present      

4A  C3KX-PWR-350WAC     LIT145108S6  OK              Good     Good     350/0

4B  Not Present      

SW  Status          RPS Name          RPS Serial#  RPS Port#

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

1   Not Present     <>

2   Not Present     <>

3   Not Present     <>

4   Not Present     <>

[Ivan Shirshin · Accepted solution]

Hi,

In power stack 1 the "High port priority value" is the same for both switch 1 and 2. Could change one of those to have unique values and check for errors after that?

Power stack name: power1

    Stack mode: Redundant

    Stack topology: Ring

    Switch 2:

        High port priority value: 12

    Switch 1:

        High port priority value: 12

Kind Regards,
Ivan

**Please grade this post if you find it useful.

[Karsten Iwen]

Thanks Ivan, that did it! I wasn't aware that also these High-values had to be different.

[Ivan Shirshin]

welcome, Karsten!