We have 9 AP's 250s within close proximity of one another some only 20-30ft apart

[cforrest]

I am wondering when the option "High Density Configuration" is required, and what affect this has on the AP reach and configuration . As the AP's sit on Auto power allocation I am wondering if they should be allowed to transmit at 16db in almost open space on their 5Ghz radio.

Also as 250's have been around for a while what benefits could we see on slightly higher models.

[cforrest]

Ah thanks for this > It seems our AP's have the config which allows them to choose up to 19db, im thinking to reduce this marginally as I am think this will help roaming also , and this may be why our clients pin to one AP for quite some time

[samantha_lynn]

This guide reviews when to use High Density settings: https://thehivecommunity.aerohive.com/s/article/When-to-Use-High-Density-Settings

Briefly, you only want high density settings enabled if the APs are in the same room (no walls between them) and you are processing a large amount of client data.

I would highly recommend dropping the power to 5dBm or less, given how close the APs are to each other. With APs that are too close, with the power set too high, you'll get overlapping signals which causes packet damage, which causes slow wireless and possibly client disconnections. To see if the APs are too loud, you can run the command "show acsp neighbor" and check the RSSI values. This guide goes in to detail on how to read the output of that command (it's the first command discussed in the Solution section): https://thehivecommunity.aerohive.com/s/article/Radio-Frequency-Interference-NG

Finally, this page compares our AP models so you can see the differences in later models compared to your AP250: https://www.aerohive.com/wp-content/uploads/Aerohive_Datasheet_AP-Portfolio.pdf