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.
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 connectionshow interface eth X/X/X / the port in use for the connectionshow run interface eth X/X/X the port in use for the connectionshow media validation eth X/X/X the port in use for the connection
ThanksMayank
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.
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
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.
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 tint < port number>spanning-tree 802-1w admin-edge-portstp-bpdu-guardexit
Thanks
Mayank
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.
