Posted: Mon Jun 17, 2019 13:25 Post subject: 2.4ghz is slow on TP-Link Archer A7
Hi,
I have DD-WRT installed on a TP-Link Archer A7 (Firmware v3.0-r39296 std 03/27/19). My DD-WRT router is connected to a ISP provided Fritz!Box 7430 which is a DSL modem and router. I was messing around with my WiFi configs today and found something odd. The Archer A7 is dual band and the Fritz!Box only supports 2.4ghz so I setup three networks and did speed tests and got these results:
Can someone please help me try to figure out why the 2.4ghz radio on the DD-WRT router is working so slowly? Both 2.4ghz networks are running on the same channel so I don't think it's a channel congestion issue. I'm not really sure how to go about debugging this.
Notes, in order to get max speed on 2.4GHz you need:
HT40 channel width
a clear channel (1, 6, or 11 are best).
Open or WPA2+AES security (not WEP or WPA).
Short Preamble and Short GI are enabled
WMM Support must be enabled.
Antenna chains, don't change them from the default unless you know what you are doing. _________________ Before asking a question on the forums, update dd-wrt: Where do I download firmware? I suggest reading it all.
QCA Best WiFi Settings
Some dd-wrt wiki pages are up to date, others are not. PM me if you find an old one.
Atheros:
Netgear R7800 x3 - WDS AP / station, gateway, QoS
TP-Link Archer C7 v2 x2 - WDS Station
TP-Link TL-WDR3600 v1 - WDS Station
TP-Link 841nd v8 - NU
D-Link 615 C1/E3/I1 x 7 - 1 WDS station
D-Link 825 B1 - NU
D-Link 862L A1 x2 - WDS Station
Netgear WNDR3700v2 - NU
UBNT loco M2 x2 - airOS
Broadcom
Linksys EA6400 - Gateway, QoS
Asus N66U - AP
Netgear WNDR3700v3 - not used
MediaTek
UBNT EdgeRouter X - switch
Joined: 18 Mar 2014 Posts: 12837 Location: Netherlands
Posted: Mon Jun 17, 2019 17:02 Post subject: Re: 2.4ghz is slow on TP-Link Archer A7
arnath wrote:
Can someone please help me try to figure out why the 2.4ghz radio on the DD-WRT router is working so slowly? Both 2.4ghz networks are running on the same channel so I don't think it's a channel congestion issue. I'm not really sure how to go about debugging this.
"Both 2.4 GHz radios are on the same channel" is the definition of network congestion.
I meant that the issue isn't congestion with other networks in my apartment because they're both on the same channel and should degrade the same amount because of that.
I have tried turning off one of the 2.4ghz radios at a time so there was only one WiFi network being broadcast at a time and that didn't change the outcome at all. Also, if the issue is strictly congestion from the other network, both 2.4ghz networks would be slow and the one on my Fritz!box works great.
Posted: Mon Jun 17, 2019 19:50 Post subject: Wireless Settings
Post a screenshot of your wireless settings (including the advanced checkbox) on the Archer A7.
It is best to zip up the file, either .zip or .7z
The forum software is old and does not handle large photos well. _________________ Before asking a question on the forums, update dd-wrt: Where do I download firmware? I suggest reading it all.
QCA Best WiFi Settings
Some dd-wrt wiki pages are up to date, others are not. PM me if you find an old one.
Atheros:
Netgear R7800 x3 - WDS AP / station, gateway, QoS
TP-Link Archer C7 v2 x2 - WDS Station
TP-Link TL-WDR3600 v1 - WDS Station
TP-Link 841nd v8 - NU
D-Link 615 C1/E3/I1 x 7 - 1 WDS station
D-Link 825 B1 - NU
D-Link 862L A1 x2 - WDS Station
Netgear WNDR3700v2 - NU
UBNT loco M2 x2 - airOS
Broadcom
Linksys EA6400 - Gateway, QoS
Asus N66U - AP
Netgear WNDR3700v3 - not used
MediaTek
UBNT EdgeRouter X - switch