RB711's Kernal Panic,Reboot,Lose Firmware, cpu sets to 250mz

RouterOS General
1

I’ve got several of these in a wireless backhaul configuration using NV2 and wds. I noticed today that about 4 or them were running at 250mhz instead of 400mhz, so I changed them to 400 and rebooted. One of them never came back after the reboot. Took a power cycle to get it going. 2 hours later it has locked up again. I havent driven out there yet because our backup link is up so we’ll work on it in the morning. But I noticed that 2 others that were changed to 400mhz kernal paniced and rebooted within an hour and are now showing no firmware.

Is there a known issue with these boards? Should I be running them at a slower clock speed? We are pushing 40-75 megs through these links. I have another one that pushes 100 megs that has been losing firmware periodically as well. They still function just fine and you can reload firmware and they are ok for a while.

Any ideas? They are all using 2.38 firmware with ROS 5.14. These are all RB711G 5HnD

2

set cpu to 400Mhz, then upgrade ROS to 5.22 and then firmware to 3.0

3

Updating firmware and software did not help. Router was rebooting about every minute. The only way I could resolve it was to set it back to 250mhz which is ok for that particular link, but Id like to be able to run it faster. Any other ideas?

4

/system routerboard settings set force-backup-booter=no
/system routerboard upgrade

then set cpu to 400Mhz

5

just buy another ones, they are defective. I set them to 250mhz and installed at clients and bought new for ptp links. You are not the only one.