RB750GL as a Switch

Hello guys! This is my 1st post here… I’ve been searching for this and I found many posts but I think none of them are giving me the information I’m looking for…

I have to say that I am a total newbie on “networking topics” so it means that I don’t have no idea of how to do most of the things…

What I would like to do is to convert my old RB750GL into a simple switch taking advantage of its Atheros 8327 integrated chip.

The thing here is that I tried to follow many guides but there are some things missing on my switch (i.e. Master port on each port configuration to set them as Master-Slave…)

Now I’m having the 6.49.10 version installed and I have so many questions:

  • 1.- In “Quick Set”, do I have to configure my 750GL in Bridge Mode or Router Mode


  • 2.- On “Interfaces” menu, I have 1 bridge and 5 ethernet interfaces, all of them in Slave mode. It is ok? Or it is not using the Atheros 8327 chip and it is using the CPU instead for “switching” stuff?


  • 3.- Keeping in mind that I only want it as a Switch, I suppose that I can disable firewall, NAT, etc…

Here’s a pic of the Interfaces I have:

Can you explain me how to convert it into a switch in the same way you’ll explain this to your lovely grandma???

I really appreciate you spending your time reading this and looking forward for your answers!

Have a nice day all of you guys!

https://forum.mikrotik.com/viewtopic.php?t=182276

Ok, I think I have it following this:

So, How can I know if I’m using the switch chip for switching instead the CPU??

I can think of three ways to check this:


  1. Empirically: Run an iperf3 test between two ports while you check the CPU usage with winbox. If CPU usage is low while it’s giving a result well over 900 Mbit/sec, it’s hardware-offloaded.
  2. Inspection: Go to Bridge → Ports in winbox and look for the “H” flag, documented here. Ports without that flag will use the CPU even when forwarding to hosts on the same LAN.
  3. Construction: If you have only one bridge defined and have everything set to its defaults, with no clever stuff going on, RouterOS should come up in hardware-offloaded mode without fail. If you can show otherwise by one of the two prior methods, I want to know why it fails.

If you ask my advice, you take those in reverse order, with the by-construction step already done, if I’m reading your prior post correctly. The next steps are to check it by inspection and by direct test.

I think it is now working correcly! it does not take more than 4-5% of the cpu when running Iperf3.

This switch is intended to be used by 4 computers. One of those for online gaming (for ether2)… Is there any other setting I should configure to improve it? I found out that playing online sometimes I lose the connection with the server and I need to restart the game.

Thanks a lot for your help and tips!