topic Re: Error state UP and Down in ICX Switches

Error state UP and Down

fabio-santo — Wed, 20 Aug 2025 13:08:19 GMT

My company's switch logs show Down and Up statuses on the interfaces, even though the end devices are operational. We performed a firmware update to see if it would resolve the issue, but it didn't.

Re: Error state UP and Down

Mayank — Wed, 20 Aug 2025 13:54:24 GMT

Hi Fabio Santo,

Thank you for posting your query!

I have a few questions for you:

1. What was your last firmware version, and what is your current firmware version and switch model?
2. Is this issue happening only on the ports 2/1/32, 1/1/4, 1/1/23, and 1/1/31, or are other ports experiencing the same problem? How many ports are affected?
3. Have you tried changing the port, SFP, or cable with a known working one? If not, could you please try that?

Please share the below logs :

show media eth X/X/X the port in use for the connection
show interface eth X/X/X / the port in use for the connection
show run interface eth X/X/X the port in use for the connection
show media validation eth X/X/X the port in use for the connection

Thanks
Mayank

Re: Error state UP and Down

fabio-santo — Wed, 20 Aug 2025 14:32:23 GMT

Hello Mayank.

1. SPR08095s 05/19/2025 stable. I don't remember the previous one.

2. No. It's currently occurring on several interfaces of the ICX-7150 edge switches. More than 10 ports per device.

3. Yes, the port and physical cabling have been replaced, but the logs remain. And the strangest thing is that there is no connectivity failure on the end devices.

Re: Error state UP and Down

Chandini — Wed, 20 Aug 2025 14:37:52 GMT

Hi Fabio Santo,

Thank you for reaching us

Further to the previous post, could you also provide details about the end device connected to this switch—particularly the ports that are exhibiting flapping behavior?

Based on the image, the port flaps appear to occur just seconds apart. To confirm whether the port is indeed flapping, you can check the interface uptime using the command: "show interface ethernet <port number>" and verify if you notice any CRC's or InErrors

Thank you

Re: Error state UP and Down

fabio-santo — Wed, 20 Aug 2025 14:57:39 GMT

The second screenshot contains the information you're requesting. There are no CRC errors. The end device is a desktop computer, and as I said, it's not affected by a lack of connectivity. My issue is with the log messages that end up blocking the Switch logs.

Re: Error state UP and Down

Mayank — Thu, 21 Aug 2025 05:29:24 GMT

Hi fabio-santo,

For testing purpose could you please use the below configuration under one of the interface and observe the behaviour:

For the End user station connecting ports :
conf t
int < port number>
spanning-tree 802-1w admin-edge-port
stp-bpdu-guard
exit

Thanks

Mayank

Re: Error state UP and Down

Chandini — Thu, 21 Aug 2025 09:18:57 GMT

Hi Fabio Santo,

Thank you for reaching us

Ack and Thank you for sharing the details.

Although there's currently no observed impact, could you please confirm whether a patch panel is involved in connecting the devices experiencing port flaps to the desktops?

If a patch panel is in use, we recommend testing by directly connecting a laptop to one of the frequently flapping ports. This will help determine whether the issue persists without the patch panel in the path.

Thank you