Eth0 rx hang loop

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  • Updated 6 months ago
I just started as the network admin at a school. No previous experience with AH. I consoled into one of the AP121's and I keep getting a logging message that says

"[eth]: detect eth0 rx hang, recover by fast reset"
[eth]: detect eth0 rx hang, schedule workq to recover it"
It seems to happen every minute. I was just wondering if anyone had experienced this before. I apologize if this is an rtfm question, but I didn't see anything on the forum.

Thank you
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Rick Cartwright

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Posted 6 months ago

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Photo of Mike Kouri

Mike Kouri, Official Rep

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To me, this sounds like the AP is receiving incomplete or corrupted frames which causes the chipset to get confused, and then our software forces it to recover. Nothing in particular you can do to or on the AP itself for this situation, you could try troubleshooting the upstream equipment to see if they are reporting excessive collisions or other issues. Or, you could just ignore it, because the upstream sender will re-send the frame and the AP should then receive it without issue.

If these events are truly happening like clockwork, then I would look at the ethernet cable plant to see if there is something injecting noise.