2.4 GHz shuts off

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chzuck
DD-WRT Novice


Joined: 24 Aug 2014
Posts: 12
Location: Pennsylvania

PostPosted: Sun Nov 29, 2020 19:20    Post subject: 2.4 GHz shuts off Reply with quote
I have dd wrt (v3.0-r40559 std (08/06/19)installed on a WRT1900ac Linksys router. From time to time the 2.4GHz channel appears to be off. Anyway the light is off and it seems some site load really slow. If I turn if off and back on the light for that frequency lights up. Then websites appear to load in a timely manner. Any ideas on what I can do?
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blkt
DD-WRT Guru


Joined: 20 Jan 2019
Posts: 3461

PostPosted: Sun Nov 29, 2020 19:54    Post subject: Reply with quote
Verify the version of your router by looking at the bottom sticker or label in the upper right "Model No."...

There are four WRT1900 variants: AC, AC V2, ACS, ACS V2.

08/02/2020 - r44048
chzuck
DD-WRT Novice


Joined: 24 Aug 2014
Posts: 12
Location: Pennsylvania

PostPosted: Sun Nov 29, 2020 23:12    Post subject: Reply with quote
WRT1900AC ver 1
WENED
DD-WRT Guru


Joined: 30 May 2017
Posts: 564
Location: Rural Manitoba

PostPosted: Mon Nov 30, 2020 1:38    Post subject: Reply with quote
Follow blkt's advice and load in r44048 build.

Other than r31924 it is the only stable build I have found for the 1900V1 although other builds may work fine they did not for me with my configuration.

_________________
WRT3200acm Master WDS 5GHz 80Mhz CH 100 (+6) r47608
Ath1 2.4Ghz Disabled
99 Static Leases
ExpressVPN

WRT3200acm r47608 WDS Station 5Ghz
Ath1 AP N/G Mixed Channel 11 HT40

WRT1900Ac V1 5Ghz r47608 WDS Station
(Defective, no 2.4Ghz but 5Ghz works great)

WRT1900AC V1 5Ghz AC 80Mhz WDS Station r47608
2.4Ghz AP Ch1 HT20 Mixed

WRT1900ACS SPARE r47608

WRT1900AC V1 5Ghz AC 80Mhz WDS-AP r47608
2.4Ghz AP Ch1 HT20 Mixed

WRT54G DD-WRT v3.0-r37305 micro AP CH 6 Mixed - Not in use

3200 Master -> LAN -> 1900ACS -> WDS 5Ghz -> 1900 V1 (X2)
3200 Master -> WDS -> 3200 Slave & 1900V1
blkt
DD-WRT Guru


Joined: 20 Jan 2019
Posts: 3461

PostPosted: Mon Nov 30, 2020 15:23    Post subject: Reply with quote
Download ddwrt-linksys-wrt1900ac-webflash.bin and use web GUI Administration -> Firmware Upgrade (do not reset).

https://dd-wrt.com/support/other-downloads/?path=betas%2F2020%2F08-02-2020-r44048%2Flinksys-wrt1900ac%2F

https://download1.dd-wrt.com/dd-wrtv2/downloads/betas/2020/08-02-2020-r44048/linksys-wrt1900ac/

ftp://ftp.dd-wrt.com/betas/2020/08-02-2020-r44048/linksys-wrt1900ac/

It is recommended to flash over an Ethernet cable connected to a LAN port, not over WiFi (disable client adapter).

Some have problems with Chrome or Chromium-based browsers, so highly suggest using Firefox, fork or derivative.

Pale Moon, Waterfox (Current 78 or Classic 56), Firefox ESR 78 or Firefox Portable Legacy (ESR 52 or 45, use offline).

In general please avoid or disable add-ons, extensions or plugins and clear all history in advance.

The information below is optional, to reconfigure from scratch.

Verify successful flash and automatic reboot into the new target build of DD-WRT, then hardware reset.

If you want to avoid the physical reset button, alternatively use Web GUI -> Administration -> Factory Defaults to clear nvram, or a third option is to issue command "nvram erase && reboot" via Telnet.
chzuck
DD-WRT Novice


Joined: 24 Aug 2014
Posts: 12
Location: Pennsylvania

PostPosted: Mon Nov 30, 2020 21:49    Post subject: Reply with quote
Thanks much for that information. I will install as you mentioned and see how it works.

Don't like Google, so I use Firefox and Waterfox.
chzuck
DD-WRT Novice


Joined: 24 Aug 2014
Posts: 12
Location: Pennsylvania

PostPosted: Wed Dec 02, 2020 0:26    Post subject: Reply with quote
Install went without incident.

Could you recommend any particular settings for 2.4 and 5 that work better than others?
blkt
DD-WRT Guru


Joined: 20 Jan 2019
Posts: 3461

PostPosted: Wed Dec 02, 2020 3:04    Post subject: Reply with quote
It comes down to your client devices, how they behave with WRT1900AC V1, and nearby channel usage.

Set your channels (do not use Auto) and start simple before branching out to more aggressive settings.

Channel Width, Save, Extension Channel, Save, Wireless Channel, Save. Reboot. Some examples are below.

2.4 GHz: AP, Mixed, Full (20 MHz), Channel 1, 6 or 11 @ TX power 30 dBm

5 GHz: AP, Mixed, Full (20 MHz), Channels 36 to 48 @ TX Power 23 dBm or 149 to 161 @ TX Power 30 dBm

I use separate SSIDs and enable Short Preamble. If ath2 is visible, set ath2 Wireless Network Mode Disabled.

Keep wireless security mode defaults as WPA: with only WPA2 Personal and CCMP-128 (AES) checked.

Over time you can try new things, preferably one or two instead of all at once so you can isolate problems.

Try defaults before restricting Wireless Network Modes, widening Channel Width, larger Beacon & DTIM, ACK.

Check out WiFi Analyzer open-source by VREM, also WifiInfoView by NirSoft.
chzuck
DD-WRT Novice


Joined: 24 Aug 2014
Posts: 12
Location: Pennsylvania

PostPosted: Wed Dec 02, 2020 4:15    Post subject: Reply with quote
With two different SSID's will the devices know which one to connect with?

Looking for information to educate myself on routers and DD-WRT.
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