I’m running into a problem where on ‘high’ network loads (e.g. over 500Mb/s) sustained for more than ~10s the network interfaces on my R4 go down.
The logs/dmesg don’t show very much information, just saying that the link(s) go down and come back up straight away. This has been happening since I got the device.
Tue Sep 17 04:29:33 2024 kern.info kernel: [ 3123.556862] mt7530-mmio 15020000.switch lan3: Link is Down
Tue Sep 17 04:29:34 2024 kern.info kernel: [ 3124.066579] br-lan: port 5(lan3) entered disabled state
Tue Sep 17 04:29:34 2024 daemon.notice netifd: Network device 'lan3' link is down
Tue Sep 17 04:29:35 2024 kern.info kernel: [ 3125.972606] mt7530-mmio 15020000.switch lan3: Link is Up - 1Gbps/Full - flow control off
Tue Sep 17 04:29:35 2024 kern.info kernel: [ 3125.973199] br-lan: port 5(lan3) entered blocking state
Tue Sep 17 04:29:35 2024 daemon.notice netifd: Network device 'lan3' link is up
Tue Sep 17 04:29:35 2024 kern.info kernel: [ 3125.985924] br-lan: port 5(lan3) entered forwarding state
Only thing I noticed was a massive spike in CPU context switches, going from under 1k/s to ~100k/s
I am running OpenWrt SNAPSHOT (r27426-232cc239b8), kernel 6.6.51.
Not sure if this is a configuration, software, or hardware problem.
Has anybody else had similar issues? Would appreciate any help or troubleshooting tips.