3750X Stack-power issue.

datacenter · ‎10-18-2012

Hi, I'm experiencing some strange scenario on 2 3750x switches in stack mode.

After updating the IOS from 12.2(53r)SE1 to 15.0(2)SE, I'm getting some annoying logs like this:

%PLATFORM_STACKPOWER-4-UNDER_BUDGET: Switch 1 does not have sufficient power budget

Then checking the stack-power config I noticed that the Power budget from switch 1 is different from switch 2:

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-PSS Ring 700 271 446 -17 2 2

Power stack name: Powerstack-2
    Stack mode: Power sharing strict
    Stack topology: Ring
    Switch 1:
        Power budget: 206
        Power allocated: 223
        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: Switch 2 - c471.fe35.d600
        Neighbor on port 2: Switch 2 - c471.fe35.d600

    Switch 2:
        Power budget: 223
        Power allocated: 223
        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: Switch 1 - c471.fe56.5b00
        Neighbor on port 2: Switch 1 - c471.fe56.5b00

I searched a lot throught the internet but didn't found anything, only that the first IOS version power budget was 206 and any IOS after this uses 223.

Do you guys have any idea what i can do?

I already changed the Stack mode to redundant, strict and non-strict, but the problem remais.

Also, this model of switch 3750X consumes a lot of CPU, the HULC Led Proccess keeps on 30% almost all the time.

If you guys could help me I'll really appreciate.

Thanks in advance,

Cristiano.

Arumugam Muthaiah · ‎10-20-2012

Hi,

This issue has close match to a known Bug - CSCtt70484

CSCtt70484 - %PLATFORM_STACKPOWER-4-UNDER_BUDGET: Switch 2 does not have sufficient p

This is a one time issue seen after upgrading to 12.2(55)SE1 or later releases. The minimum power budget values for the 3750X SKUs have been updated starting 12.2(55)SE1.
To program the MCU EEPROM with the new Minimum Power budget values, the Stack-power has to be reset by power-cycling the switches once (by removing the power supplies and the stack-power cables) after upgrading to 12.2(55)SE1 or later releases from 12.2(53)SE2 /12.2(55)SE.
This is the only way to resolve the issue

Please try the above mentioned work around then share the detail.

Also, this model of switch 3750X consumes a lot of CPU, the HULC Led Proccess keeps on 30% almost all the time.

The "Hulc LED" process does following tasks:

Check Link status on every port
If the switch supports POE, it checks to see if there is a Power Device(PD) detected
Check the status of the transceiver
Update Fan status
Set Main LED and ports LEDs
Update both Power Supplies and RPS
Check on system temperature status

The Catalyst 3750-X switches have a CPU utilization level that is higher than the previous models of the Catalyst 3750 switches. This is normal behavior.

One can expect that the overall CPU utilization will be between 25 - 35%. Plugging PoE devices into all ports on a 3750-X switch will cause the CPU utilization to increase however it will remain in the normal 25 - 35% range, but in our case there are no POE devices connected to the

switch.

Since almost all of the packet forwarding is done in hardware and not by the CPU a CPU utilization of 25 - 35% should not be cause for concern.

Refer:

CSCtn42790 - 3560X/3750X: Elevated CPU usage due to Hulc LED process

Regards,

Aru

*** Please rate if the post is useful ***

Regards, Aru *** Please rate if the post useful ***

datacenter · ‎10-22-2012

Thanks Aru,

I'll try to do this on some weekend and then post the result.

These are the core switches from one of our branches abroad, so it ain't that easy to do it.

Thanks again!

Cristiano.

ksk391393 · ‎12-07-2012

hi Arumugam ,

I am also having same error with my 2x cisco 3750X switch stack and i have not upgraded any IOS its new Switches .

getting below error .

%PLATFORM_STACKPOWER-4-UNDER_BUDGET: Switch 1 does not have sufficient power budget

MI101A01DCSA10#sh stack-power

Power stack name: Powerstack-2

Stack mode: Power sharing strict

Stack topology: Ring

Switch 1:

Power budget: 206

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.e51d.7300

Neighbor on port 2: 503d.e51d.7300

Switch 2:

Power budget: 223

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: e05f.b92b.2980

Neighbor on port 2: e05f.b92b.2980

only the below configuration is done .

stack-power stack Powerstack-2

mode redundant

!

stack-power switch 1

!

please suggest any other cnofiguration might be required ?