One question about channels though...
Channels 1-6-11 on 2.4GHz are recommended, but not mandatory. In my area I see 30+ 2.4GHz networks on channels 1-11, no much of a choice, so the best throughput channels for me are 4 and 8 (up to 50-60Mbps). Lots of noise/interference, not usable for high speed ISP connections, therefore I don't use any 2.4GHz devices. My entire WiFi network is 5GHz. In regards of 5GHz channels, I get identical signal levels on lower and higher channels, but better throughput on lower channels. Experiment and see what works best in your place.
OK, try this:
In Administration - Privacy
- Withdraw (to stop all TrendMicro services, in case something affects the performance)
In Wireless -> General:
- Smart Connect - Disabled, use separate SSIDs for 2.4GHz and 5GHz bands (for best performance)
- 2.4GHz channel - Wireless Mode Auto, 20MHz wide, channel number whatever works best in your place
- 5GHz channel - Wireless Mode Auto, 80MHz wide, lower channels 36-40-44-48, control channel 36
- Protected Management Frames - Disabled
In Wireless - > Professional:
- Roaming Assistant - Disabled (both bands, to prevent clients disconnection)
- TX Bursting - Disabled (both bands, valid for G clients, 2.4GHz only anyway)
- Airtime Fairness - Disabled (both bands, incompatible with some clients)
- Modulation Scheme - MCS7 802.11n for 2.4GHz (standard N specs)
- Modulation Scheme - MCS9 802.11ac for 5Ghz (standard AC specs)
- MU-MIMO - Disabled (both bands, for best compatibility, minimal to no performance gains to keep it Enabled)
- Beamforming - Disabled (both bands, both types, for best compatibility, minimal to no performance gains to keep it Enabled)
I would enable 5 GHz 802.11ac Beamforming.
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