Sleeping PC slows down network

RouterOS General
1

Hi everyone,

I have a new hap ax3, and noticed slow internet speed tests (upload is 8Mbps instead of 110Mbps) after connecting my devices to the hap ax3 ethernet ports.

After some trial and error, I’ve found that the slow speed tests happen when my windows PC is connected to the hap ax3 via ethernet AND the PC is asleep. If the PC is awake then I get expected speeds. I should add that I’m running the speed test on my linux server (also connected to the hap ax3 via ethernet). So, my sleeping PC is affecting speed tests on other devices.
Also, I do not see any slowdown when my PC is connected to an unmanaged switch, and the switch is connected to the hap ax3.

Any pointers on settings for me to look into? I think my PC is throttling its LAN speed when asleep, but that should not affect general network speed to other devices.

Thank you!

p.s. PC is running Windows, with a ASUS TUF z690 d4 wifi motherboard that has an intel network adapter

2

Enabling RSTP on the default bridge solved the issue. Before, it was set to none.

3

Sleeping devices often re-negotiate ethernet port speed to 10Mbps. One “slow” port on bridge should not affect other ports on same bridge, so it would be interesting to do some troubleshooting:

  • post configuration tree under /interface
  • check running state of ethernet ports by executing /interface/ethernet/monitor X (where X is port index, most likely going from 0 to 4)
  • check logs to see if it contains anything weird … starting from teh moment when PC goes to sleep
  • etc.