Hi everyone!
I'll be getting a fiber connection to my house in a while, and I need some help setting up transmission rate limiting (download as well as upload) to all my home devices. I've read about solutions like tc, luci-app-nft-qos or qos, but I don't know which one is best for my solution and which one is the most future-proof/developmental.
- My goal is to configure a network based on 3 routers (one main router as a DHCP server and connection to the Internet (WAN port), and the other 2 as Access Points). However, the problem for me is to configure a router with OpenWRT software, in which I will assign data rates (download and upload) for each group with devices by MAC address (diagram attached).
- It would also be a good solution to create an additional group (number 5) to which all undefined devices (unrecognized MAC address) will go and be limited to 1MB/s (download and upload).
- Is it possible to limit data transfer between groups only for the WAN interface (Internet connection)? So that data transfer on the local network can be done without speed limits?
- In the future, I would also like to think about a solution that, for example, will check whether certain devices (from a given group, for example, group 2) are plugged into the network. If not - group number 1 will increase its transfer speeds to, for example, 10MB/s (download and upload). Is such a solution possible to configure/write?
My network assumptions:
- All devices are on one network.
- There are no subnets or VLANs created in the network.
- All devices are visible with each other.
- The main router (1) has all settings configured, along with a DHCP server. The other 2 routers serve only as WiFi signal extenders and additional Ethernet ports.
- Individual groups with devices have transmission bandwidth limits for download and upload. For example: if in group 1 computer 1 downloads at 8MB/s then the other 2 devices (together) have only 2MB/s download.
- All devices have limitations defined in groups by MAC address regardless of what router they are plugged/connected to.
So I am asking for help and advice on how to implement the given solutions (1-4) (and if they are even possible). What to follow/rely on? Or maybe someone will make a suggestion with a better and simpler solution? 
To users willing to help/advise, thank you very much in advance for your time.