Posted: Fri May 01, 2020 8:24 Post subject: 2.4Ghz WRT 1900ACS V2 problem v3.0-r40559
I have returned to factory settings. Re installed the Firmware: DD-WRT v3.0-r40559 std (08/06/19)
The settings are as the pictured.
I have tried different canals and nothing more then 20mbps. On 5ghz I have a >150mbps. On 2.4G I was having 100mbps and more. Now the internet on 2.4G is very slow.
Please help me with this.
I have tried to use any other canal by analyzing the other routers. but the speed is not increasing on 2.4g.
Should I try to use on older build ?
This was working fine for 6+ months but now something go wrong. This is why I posted the settings and the security settings in the pictures. Now I noticed that when I disable the security the speed is normal on 2.4g
I updated and reset the router to build DD-WRT v3.0-r42954 std (04/20/20) but no fix. I opened this treed because I have no idea about optimal settings. If some one can provide the optimal settings W will be very happy. Now I am with Firmware: DD-WRT v3.0-r42954 std (04/20/20)
Joined: 04 Aug 2018 Posts: 1296 Location: Appalachian mountains, USA
Posted: Fri May 08, 2020 15:14 Post subject:
Leave Tx Power at the default 30 dBm. If Germany requires lower, the router will adjust downward... Look in the status tab to see the effect.
As someone else said above, never use Auto for channel (or extension), as it has a history of causing problems, including extreme slowdown in some cases. Choose channel 1, 6, or 11. If you want to know which has the least interference, first go to Status>Wireless and use the two survey buttons at the bottom to see what your neighbors are up to. For example, if there's a powerful signal on Channel 1 (esp if it shows a lot of busy time), be on Channel 6 or, even better, Channel 11. Rejecting adjacent-channel signals is not a perfect process, and the further away you are spectrally from the interferer, the better.
In general, as the Cliff Notes sticky says, the resource for setting parameters for this router is https://wiki.dd-wrt.com/wiki/index.php/Atheros/ath_wireless_settings. My settings are like yours (other than channel/extension) except that I do enable Short Preamble. But it's getting the mode, channel, and extension right that usually makes the difference.
I'm on build 42926 myself (posted online under 42925) and am showing a 450Mbit/s connection on 2.4 GHz in the same room. But I doubt your problems are about the build. It's far more likely to be a configuration or interference problem. _________________ Six Linksys WRT1900ACSv2 routers on 46816, 48141: VLANs, VAPs, NAS, client mode, OpenVPN client (AirVPN), DDNS, wireguard servers and clients (AzireVPN), three DNSCrypt DNS providers (incl Quad9) via VPN clients.