Logging port activity

Unanswered Question
Feb 2nd, 2009
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I am trying to troubleshoot my VoIP phone not powering up when I connect it to my fa 0/1/0 on a 3825 with an HWIC-D-9ESW with the PoE option installed. The phone used to work but just stopped. When I plug it into any port on the HWIC the power LED blinks about once every 6 seconds. I would like to see if I can capture any logging the port is doing to further analyze this problem.


Appreciate any help.

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Leo Laohoo Mon, 02/02/2009 - 19:48
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Does the HWIC-D-9ESW have an optional power module to provide inline power for IP telephones?


What is the output to the command: sh power inline

kirbyw001 Mon, 02/02/2009 - 20:28
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It the HWIC does have the inline power supply for IP phones. In fact this phone used to work on in this current configuration.


When I do "sho power inline" I get the output below.


sho power inline

PowerSupply SlotNum. Maximum Allocated Status

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

INT-PS 0 360.000 0.000 PS1 GOOD

Interface Config Device Powered PowerAllocated

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

Fa0/1/0 auto Unknown Off 0.000 Watts

Fa0/1/1 auto Unknown Off 0.000 Watts

Fa0/1/2 auto Unknown Off 0.000 Watts

Fa0/1/3 auto Unknown Off 0.000 Watts

Fa0/1/4 auto Unknown Off 0.000 Watts

Fa0/1/5 auto Unknown Off 0.000 Watts

Fa0/1/6 auto Unknown Off 0.000 Watts

Fa0/1/7 auto Unknown Off 0.000 Watts

kirbyw001 Mon, 02/02/2009 - 20:29
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The VoIP telephone is currently connected to fa 0/1/7.

Leo Laohoo Mon, 02/02/2009 - 20:47
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What is the IOS and feature of the router?

Leo Laohoo Mon, 02/02/2009 - 20:50
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"The phone used to work but just stopped.", have you tried other phones? Have you tried to plug this phone to other PoE ports? Have you tried using a power brick?

Leo Laohoo Mon, 02/02/2009 - 20:52
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Please refer to the following link:


http://www.cisco.com/en/US/docs/ios/lanswitch/configuration/guide/lsw_hwic_ethsw_ic.html#wp1043334


"There is no inline power on the ninth port (port 8) of the HWIC-D-9ESW card."


Can you try to move the phone to a different port?

kirbyw001 Mon, 02/02/2009 - 20:57
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The IOS is 12.4


I have tried this phone and a spare in multiple ports except fa 0/1/8 since it is not PoE capable. Also I have tried both phones on other PoE devices and they work fine. As for a power brick, I do not have one available.

Leo Laohoo Mon, 02/02/2009 - 21:04
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So basically, if you plug this (and only this) phone to any other ports, it won't power up but other phones will. Is this correct?

kirbyw001 Mon, 02/02/2009 - 23:22
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no phone would power up on this router but would on another PoE device.


However, I found my problem....it turned out to be two faulty ethernet cables that would work for a PC but would not provide PoE for my VoIP. What pins on the ethernet cable is the power on? Does it travel the same pins as the RX/TX data (1, 2, 3, & 6)?

Leo Laohoo Tue, 02/03/2009 - 19:07
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PoE uses pin 4 & 5.

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