How can I troubleshoot the poe switch. all ports suddenly shut down.

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How can I troubleshoot the poe switch. all ports suddenly shut down.  the main problem is it was stacked to other switches. I don't know how to configure it in master slot 1. or are I going to pull out the defective switch then how to troubleshoot the poe all ports not giving power to poe devices.
Thanks for your help. have a great day.
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Resolut1on

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Posted 1 year ago

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Vellachery, Sumeesh, Employee

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Gerald,

There are few things which you need to check:-

•         What are the End-devices that are connected to the affected ports?
•         What are the suspected PoE ports which aren’t working?
•         Have you tried resetting the inline power on the suspected using “reset inline-power ports port_list” or disabled and re-enabled the inline power?
•         After performing the above steps, please share the below-mentioned outputs once again
            o    show inline-power
            o    show inline-power info ports port_list
 
To rule out hardware related issues, please run an extended diagnostic test on the suspected switch “run diagnostics extended” and then provide the output of “show diagnostic”.
 
Note: - Running Diagnostics will disrupt network traffic, please schedule a MW to perform the activity.
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Resolut1on

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Hi,

Thanks for quick response. 
The connected devices are VOIP telephony. I have 24 ports poe switch. suddenly all ports not gives power. but the switch is working.

The defective switch is on stacked slot 3 so I need to pull out it first, because I don't know how to config it through master slot 1.

After I pulled out it from stacked I will give you the outputs of show inline-power and try to disable and enable inline-power.

Thanks.
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Vellachery, Sumeesh, Employee

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Gerald,

Once you have the outputs collected from the switch. Please open a case with GTAC so we could analyze the logs.
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Sarah Seidl

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It's probably failed POE.  I believe it's a circuit on the switch so the entire switch has to be RMA'd

Things to look for thru the logs to confirm:



sh Slot-1 .1 # sh log mes nv
Erro:HAL.Card.Error> Slot-1: bcmPseReceiveMessageString:                                                                                                                                                              timed out

Slot-1 COHA_2217.2 # sh inline-power

                Inline Power System Information
Configured                 : Enabled
Power Usage Threshold      : 70 percent (per slot)
Disconnect Precedence      : deny-port


You can also run extended diagnostics which after the switch runs the test and reboot, you can do show diagnostics and the slot will show failed POE if it doesnt' pass.

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Resolut1on

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I pulled out a switch from stacking it is a STANBY mode. But now this is the scenario.

(pending-AAA) login:
Warning: the stack has no Master node and all active nodes are operating with
master-capability turned off. If you wish to reconfigure, you may log in using
the failsafe account. Alternatively, you may use the special login

1. I tried many times the "REBOOT AS MASTER-CAPABLE" but again it nothing happen it did not resolve.

2. I tried also went into the bootroom and executed the command "Config none" but command is not accepted, it doesn't recognize the 'config' command.

Please help. Thanks
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Vellachery, Sumeesh, Employee

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Newbie,

- How did you remove the suspected switch from the stack? If i am correct, you just disconnected the stacking cables for the suspected switch. Is that correct?

  • Connect the suspected switch back to the stack and connect the stacking cables. Once the suspected switch is back in the stack.
  • Log into the Master node.
  • From the Master node you would need to execute disable stacking node-address <mac-address of the suspected switch>
  • Power-off or reboot only the suspected switch.
  • Disconnect the stacking cables.
  • Now console into the suspected switch and collect the requested outputs for the PoE Failure?

Once you have the outputs collected from the switch. Please open a case with GTAC so we could analyze the logs.
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Vellachery, Sumeesh, Employee

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Newbie,

Regarding the config none  command didn't work is due to:-
In one of the Bootrom version this feature has been removed - BootRom vers - 2.0.2.1.xtr. I suspect, you might be running on this version - 2.0.2.1.xtr.
If you type in show version, it would tell you the BootRom version running on the switch.
This feature has been added back in the latest BootRom version - 2.0.2.3.xtr