I have a Hap Ac ( router Os 6.47.1) configured with a fiber modem of 100/100 Mbps up/down bandwidth. My issue is that i get the full speed of 100 Mbps in 5Ghz band but i am limited to 50 to 55 Mbps on 2.4Ghz band. My earlier Dlink Dir 825 router on 2.4 Ghz could deliver 80 to 85 Mbps easily. Am i doing something wrong with my hAP Ac? How can i rectify this? I have default wifi configuration on 2.4Ghz channel except for below given things. Thanks in advance.

Hello,
I recommend changing the channel-width from 20Mhz to 20/40Mhz and check under the HT tab if all wireless chains are enabled.

Enable wmm support, that should help. The link rate is locked to a max of 54Mbps if it is disabled.

20/40MHz eC ?

Thank you for the recommendations


Sent from my SM-A705FN using Tapatalk

20/40MHz eC ?

Thank you for the recommendations


Sent from my SM-A705FN using Tapatalk

You should only choose this option if there are no other 2,4GHz networks (or other means of interference) in your neighborhood.
Otherwise...this is like the worst advice you can get.

Select the least used channel (preferably 1, 6 or 11) to get best performance.
And I prefer to use regulatory-domain as frequency mode to comply to regulations.

You need 2x2 client to get more speed in 2.4ghz using a 20mhz bandwidth, setting AMSDU to 2048 may also help as well as enabling WMM (disabled actually means enabled as per 802.11n/ac standard requirement but doesn't broadcast WMM frames unless you enable such option it). If your 2.4ghz spectrum is overcrowded then you won't get full speeds.

Client device's Wi-Fi data rate will not exceed 54 Mbps when wired equivalent privacy (WEP) or temporal key integrity protocol (TKIP) encryption is configured.
The IEEE* 802.11n prohibits using high throughput with WEP or TKIP as the unicast cipher. If you use these encryption methods, your data rate will drop to 54 Mbps.

Security WPA2/AES, a 2x2 client, and no other modifications to the default settings (!!!) should give you a 130 Mbps or even 144 Mbps interface data rate , if the channel (only 1,6 or 11) is free, and no one is using 2,3,4,5,7,8,9,10,12,13 or is using 40 MHz bandwidth.

- do not use "auto" frequency selection, pick the right one yourselves after "scanner/snooper/freq usage" tests. Choose from 1,6 or 11.
- avoid the G overhead, by choosing N-only. (If your client does not support N, then the client is the limiting factor here)
- stick with regulatory domain not superchannel. Don't touch the TX-power for now.
- other modifications are either irrelevant or will all reduce the performance. e.g. Changing AMSDU to 2048 is good for noisy environments ( smaller retransmits) but reduces the max throughput.
- you need a good SNR and a good CCQ (no interference, distortion, diffraction, reflection ... etc). In that case the wifi will when there is a data load go for 144Mbps-20MHz/2S/SGI (that is MCS15, 2 streams, short guard interval). Value to be found under "Registration" tab. Data throughput is between 50 and 75% of the interface rate, in one direction.
- fiddling with chains, HT-table, AMPDU flags, can kill the performance if not well understood. They are mostly there to make wifi still work in difficult circumstances, but at a lower rate.

And yes 20/40MHz could bring you 300 Mbps-40MHz/2S/SGI if it can work without interference on this double wide channel (Takes 8 channels of the 11 or 13 available, any overlap with others will be disastrous for the performance.)