Hi @YuriyB 

Thanks for posting in our business forum.

Bandwidth Control rule is set to ID 2, do you have a 1? Does it replace the current priority?

As you have enabled the BC, it will require the CPU to process and monitor each session/frame of the matching machine. So, normal to have a CPU surge.

Some monitor and firewall settings rely on the CPU instead of the hardware acceleration unit.

Your 1Gbps ISP, is that symmetrical 1Gbps?

I recommend you do this test that is without BC enabled with another WAN/LAN1 disabled(if that's your non-1Gbps WAN, just test the 1Gbps WAN).

I also require a diagram of your network with your server that receives the file specified in the diagram.

  @YuriyB 

You aren't doing anything wrong.  There is a reason these are 50 buck routers and the equivalent Cisco gear is well over 1,000.  Everything is done is software, so features like shaping and deep packet inspection will absolutely redline the CPU.

Hi @YuriyB 

Thanks for posting in our business forum.

YuriyB wrote

  @Clive_A  Hi

thanks for answer.

bandwidth control ID1 is disabled, WAN2 (backup), offline.

qos, dpi, load balancing everything is disabled.

just one lan and one wan.

Today I repeat my test. and made 3 min video:

 

https://youtu.be/5hWNXYvGpSc

 

first test with disabled bandwidth control:

uploading file to ftp ~200megabits

downloading same file  ~400megabits

zero cpu usage

 

second test with enabled bandwidth control with speeds 1000000/1000000 :

uploading  ftp ~50-70megabits

downloading same file 40-50megabits

high cpu usage

 

 

enabled

disabled bandwidth control

 

I read your description below and watched your video.

I think I have several points to clarify.

1. The SOHO router and the Omada might be different approaches in terms of bandwidth control.

2. You mentioned that you had a problem with Google Drive but not with others. This could be the Google Drive is different from other online drives. The download or the encryption might increase the CPU usage which leads to a bad speed. If this only happens to Google Drive, likely to be the issue.

3. Your video showed that when the bandwidth control is enabled, the up/down speed is throttled. That is normal. Regardless what value you have set to the speed, every frame will be processed by the CPU of this router. So, it would affect the CPU usage. And it could have a performance problem.

4. About the performance problem, I researched some docs online. It could also be a problem with the FTP protocol.

Have you tried any other protocols?

As you showed the speed test results are normal but only high CPU usage. This is expected. But FTP is throttled, which could indicate that the FTP is not efficient in the bandwidth control mode.

Hi @YuriyB 

Thanks for posting in our business forum.

YuriyB wrote

  @Clive_A 

Thanks for reply, is there any any EASY way to turn off hardware offload?

 

Just to count true traffic statistics.

 

 

 

Only in the controller mode.