@IanWaller03 On D7, linked put main deco in fixed dhcp. After this put IP of main Deco on D7 DMZ. In deco app redirect ports to dvr.

@Saurabh_S There is no correct distance between the decos. What you should always measure is the SNR (Signal / Noise ratio). For your network to function in the best way, 24db is the minimum SNR...

@Saurabh_S Wifi Explorer

Deco M5 use both 2.4 and 5 to backhaul. No, M9 you don't gain much. M5 is a most stable product for Deco line M. Backhaul use hidden network between decos. Look my 5 spot's Deco @ home

@Saurabh_S "The slave decos show decent connection signal to the main deco but the throughput is around 85 to 90 Mbps only", it's normal. You have 2 wifi connections between main deco. Your computer...

@Kevin_Z deco m5 uses qualcomm IPQ4019 chipset , this chipset have HT80 feature, any chance then enable this on M5 ?