x460 empty port blinking amber

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I have an x460-48P that someone reported a port that went down.  So I investigated and saw on the switch CLI that the port was enabled and ready, but showed nothing connected to it, even though there was a cable plugged in.  So we disconnected the cable from the switch and now the port is blinking amber.  What does this mean?  I've never noticed an EMPTY port blinking amber before.

Thanks,
Stan
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Stanley Riley Jr.

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Posted 3 years ago

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Dorian Perry, Employee

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HI Stanley,

If I'm not mistaken, this means that there was a power surge/fault on the port.

This can be verified with the command:
show inline-power info port <PORT_NUMBER>

To fix it try:
reset inline-power port <PORT_NUMBER>

If that doesn't work try:
disable inline-power port <PORT_NUMBER>
enable inline-power port <PORT_NUMBER>
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Stanley Riley Jr.

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Dorian,

Thank you for your response.  I have also noticed that if I do a sh inl slot 4, this slots budgeted power shows only 20W.  I'm thinking that I will need to take this switch out of production and run some extended diagnostics on it and get a call in to GTAC.  :(

Thanks though,
Stan
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Dave Hammers, Dir SW Engineering

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blinking amber means the port is providing POE power but there is no Ethernet device connected or the Ethernet link is not up. An example might be a phone booting before it turns on its etherenet link.

A POE fault would be alternating green/amber.
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Stanley Riley Jr.

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What would a port be delivering power to if there is nothing plugged into that port?
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Dave Hammers, Dir SW Engineering

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If there is nothing physically plugged into a port, and the LED is blinking amber, then something is wrong. Originally when I read your post, I thought you had a cable plugged into the port. Sorry for my confusion.
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Brandon Clay, Escalation Support Engineer

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Hi Stan,

This looks like it may match up with an issue that I actually have a case on right now, and I am working with engineering towards a permanent resolution.

If the PoE controller in the switch is overloaded, it can cause a voltage dip on the input, leading to the PoE controller to shutdown as a protection mechanism.

Unfortunately, the only way to recover at this point is to reboot the switch.

You can find the GTAC Knowledge article for this at the link below:
https://gtacknowledge.extremenetworks.com/articles/Solution/When-the-PoE-budget-is-exceeded-the-swit...

As I receive further information on this, the Knowledge article will be updated appropriately.

Let me know if there are any questions. If the symptoms from the Knowledge article don't match up with what you see, it may be best to open a case with GTAC to ensure that there isn't something else causing this.

-Brandon
(Edited)
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Stanley Riley Jr.

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Brandon,

Thank you for that suggestion!  I will work with my site lead there and get a maintenance window to reboot that node. 

I'll let everyone know how it turns out.

Stan
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Drew C., Community Manager

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Hi Stan, Just curious if you've had a chance to reboot the switch to see if this fixes the problem.
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Stanley Riley Jr.

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Drew,

It turned out that after running extended diagnostics, there was a PoE failure.  The switch has been RMA'd by GTAC and we are up and running again.

Thanks for the follow up.
Stan
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David Coglianese, Embassador

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We are installing 460-g2s (15.6.3.1 P 1-3) for one of our customers and have found about 40 or 50 ports that flash amber show delivering power and ready.

We are able to correct this issue but unplugging the patch cable waiting about 10 seconds for the light to go out and then patching the cable back in.


It is sort of a minor issue other than the fact that you have to be in the closet to identify or correct the problem.

Thanks
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Drew C., Community Manager

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David, does reset inline-power port <port-number> help with these occurrences?
(Edited)
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David Coglianese, Embassador

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No,

I tried that because when I first observed the behavior I thought it was a hardware fault. Somewhere perhaps in this thread I caught on to the fact that this was different. The next time I find a port in this state I will try disabling inline-power for 5 or 10 seconds to see if that does the job.

The biggest issue to me is the difficulty of seeing this remotely.

Thanks