01-22-2025 11:03 PM
(Sorry if this is a duplicate post, but I tried 2 days ago and it still hasn't appeared.)
I have an R650 running Unleashed (200.17.7.0.139) that periodically renegotiates the uplink speed down to 100Mbps, where it sticks. My network is:
Router (1g port) -> generic unmanaged switch (2.5g) -> POE injector (Ruckus NPE5818) -> R650
PoE adapter has a 48v power supply, AP Operating Mode is set to 802.3at in the Ruckus dashboard
When the uplink negotiates down, the Dashboard/Ethernet Port Status for eth1 changes from 2500Mbps to 100Mbps
Cycling the switch power supply (the easiest way for me to force renegotiation) immediately returns speed to expected, and it stays there for anywhere from a few hours to a few days before dropping again.
Based on other answers here, I have replaced all the cables (all CAT 6e or CAT 7), and replaced the switch, with no change.
I've examined the logs, and while I don't understand evert\ything there I do see that at the time of the speed dropping, I have a handful of lines over a short period like the following:
Jan 19 20:17:30 RuckusAP kernel: [182922.157158] nss-dp 3a007000.dp3 eth1: PHY Link is down
followed a few lines later by
Jan 19 20:17:45 RuckusAP kernel: [182937.189082] nss-dp 3a007000.dp3 eth1: PHY Link up speed: 1000
but the *last* "Link is down" message was followed by
Jan 19 20:23:10 RuckusAP kernel: [183261.941081] nss-dp 3a007000.dp3 eth1: PHY Link up speed: 100
This sequence does not appear anywhere else in the logs, just when the speed drops, and is usually over a 5-10 minute period; after the drop to 100Mbps it remains stable until I get around to power cycling the switch again.
What is a reasonable next step in my diagnosis? I was thinking of trying powering the AP directly instead of by POE, but that requires me hauling my 70-year-old ass up a tall ladder so would prefer to try less physical things first.
What could be triggering the link down state? Can I ssh into the AP and turn off whatever is doing this?
Thanks in advance for your help.
01-23-2025 01:55 PM
Faulty port on the AP?
01-23-2025 11:47 PM
Is there any way to test that?