RouterOS slow down

RouterOS General
1

Hello.

I have a problem with an RBLHGR&R11E-LTE device, it has version 6.45 ROS.
It slows down many times a day and only restarting helps in this case. Then it’s fast.
It has been in continuous operation for three years and has the factory system.
There is a router behind it, it was replaced with another as a test, but that didn’t solve it either.
When it slows down, it’s so slow that I can’t even log in with winbox.
And as if the underlying network also slows down at this time…
Even now, the speed dropped to 1-2 megabits.
I restarted it, it was fine for a few minutes.
Then the speed dropped again, and after a minute it recovered and the speed reached 50-60 megabits.
What could be the problem and how do you think it could be solved?

2

When slowdown happens and if you can still access the device, use tool profile to see what’s eating up CPU resources.
Also have a look at memory to see if the device is not running against it limits.

What’s running on that device ?
Something has to be consuming CPU/memory …

3

ROS version 6.45 has quite a few known vulnerabilities, including several denial-of-service ones. So the first action should be to upgrade to latest long-term version (6.49.8 ) and then analyze whether the device was hacked as well (in which case netinstall has to be performed, together with configuring device from scratch, without using binary backup files).

4

Nothing is running on the device.
There is a Quick Setup setting, there is no port forward either and no special firewall rule. Sipmle config by quick settings.
How to use a tool profile and why?

5

Thanks, I’ll try the update first.
In another forum, this was written about the error:
“cracked soldering in the radio part or a cracked capacitor in the RF circuit can cause such a phenomenon”

Would that be possible?

6

If such phenomenon would explain the problem you see, then disabling WAN interface for a minute or so would cure the problem as well.

But yes, if RF path is not in good condition, then you can see slowdowns or even link losses. Depending on the nature of fault you may be able to see large drop in Rx signal strength at the moment your throughput drops.