Bandwidth limitations - gl-ar750

HI everyone,
i’m trying to limit the bandwidth of one specific client (ip addr or mac addr) connected to my GL-AR750.
I’ve read about few plugins can could possibly do the job…but I don’t understand how to use them.
thx for the support

It can be done via the default UI, cannot it?

I put up limits from the std UI but it doesn’t look like is working. I’ve set the minimum (1Kb/s) but I still get good speeds. Only exception is ping mms.
any suggestion?

Pls let me know if you are using latest firmware 3.105 and I will verify.