Problems with WRT1900AC with DD-WRT v3.0-r50963 (11/28/22)

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invisible
DD-WRT Novice


Joined: 22 Sep 2007
Posts: 20

PostPosted: Sun Jan 22, 2023 18:54    Post subject: Problems with WRT1900AC with DD-WRT v3.0-r50963 (11/28/22) Reply with quote
I am running DD-WRT v3.0-r50963 std (11/28/22) on Linksys WRT1900AC.

I have noticed that after some time - can't figure out when exactly it happens - client connection deteriorates significantly to the point that it is impossible to watch any streaming services or use an internet connection - pinging 1.1.1.1/8.8.8.8 causes >10% packet drops - can be from the range of 10 to 50%.

Need to mention that nothing changes in terms of the internet connectivity, clients (location, activity, router config, etc. The solution is to either turn off/on the router or change wifi channel (I changed 2.4Ghz channel from 3 to 4).

What would cause this and how to fix it? What is the most reliable release for Linksys WRT1900AC without wifi problems?

I already have setup the router to reboot every night at 3AM but seems it does not help. The above situation happened just 30 min ago.

Code:
Ping statistics for 1.1.1.1:
    Packets: Sent = 488, Received = 437, Lost = 51 (10% loss),
Approximate round trip times in milli-seconds:
    Minimum = 28ms, Maximum = 571ms, Average = 70ms


Signal quality in the info tab for the client shows 100%, channel quality - 70% for 2.4Ghz and 93% for 5Ghz.
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Per Yngve Berg
DD-WRT Guru


Joined: 13 Aug 2013
Posts: 6858
Location: Romerike, Norway

PostPosted: Sun Jan 22, 2023 20:12    Post subject: Reply with quote
On the 2.4 GHz use only 1, 6 and 11. The channels overlap and interferens occur.
invisible
DD-WRT Novice


Joined: 22 Sep 2007
Posts: 20

PostPosted: Sun Jan 22, 2023 20:27    Post subject: Reply with quote
These are the most used channels, usually setup as a default in most routers and if I select any of them, Channel Qualify shows less than 40%. I don't have too many neighbors - the closest house is 200 ft away.

My original question is - what might cause such behavior with wifi and how to fix it?

If you have this router, and have no such problem with wifi, what firmware do you use?
blkt
DD-WRT Guru


Joined: 20 Jan 2019
Posts: 5660

PostPosted: Mon Jan 23, 2023 7:35    Post subject: Reply with quote
Unlikely builds will fix it simply flash latest available and instead focus on configuration, clients maybe some logs.
Four hardware revisions of WRT1900AC series make sure the correct Model No. bottom label, upper-right corner.
Disable 2.4 GHz radio, and if problems go away check for misbehaving clients with Marvell series Linksys routers.

Edit: r50963 build thread has reported issues but what I said still applies r51440 and worst case fall back r50927.
ho1Aetoo
DD-WRT Guru


Joined: 19 Feb 2019
Posts: 2927
Location: Germany

PostPosted: Mon Jan 23, 2023 8:49    Post subject: Reply with quote
the channel 1/6/11 stuff only applies to the USA, the rest of the world has more 2.4Ghz channels available and there the channels 1+5+9+13 can be used without any problems see >

https://en.wikipedia.org/wiki/File:NonOverlappingChannels2.4GHz802.11-en.svg

As a european, you should know that
blkt
DD-WRT Guru


Joined: 20 Jan 2019
Posts: 5660

PostPosted: Mon Jan 23, 2023 9:05    Post subject: Reply with quote
As a unicorn, wireless channel selection will not fix this issue!
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