I'm using 7982 as a router. It has local sub nets on it. I turned on 3 from 4 available.
When you creating it's ask you to which vlan to route it, so i did 3 different one. Something like 2,3,4. And yes I do have managed switches, but this one not going anywhere just for WLANS, basically everything local on this wap, managed by this wap. And when I creating SSID with just route to other vlan with usual router outside of that 3 on wap, speed test shows me 3 times faster speed. Basically whole speed what i have. Disconnecting device from one ssid, conectin back to other one with local to wap subnet and speed going down 🙂
It's could be that wap dividing speed on quantity of sub nets? Like if I have 90 coming to me and 3 on wap and wap reserves third per each subnet?