Asus RT-N66U

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dmehler
DD-WRT Novice


Joined: 16 Aug 2009
Posts: 23

PostPosted: Sun Aug 05, 2018 17:02    Post subject: stable Wifi and guest vap on 2.4GHZ dd-wrt version Reply with quote
I've used dd-wrt on a previous RTN66u router until the hardware died. I was having wifi issues, see Prefader's post, he summed it up right, and I've posted on it in other forums. It seems like anything from 2018 the wifi has not worked, so my question is first, what version of dd-wrt has stable wifi, on the guest, and the 2.4GHZ? Does this version have the crack fixes? I believe the version I used on this other rtn66u was r32170. On this other router I have tried builds 35452, 35916, 35927, 36104, 36154, 36168, 36330, and 36410. None have given reliable wifi and guest networks. Second question, should I be using the mega or big builds? So far I've used big builds. I'd appreciate knowing which dd-wrt has the stable wifi with stable vap and guest network so this new rtn66u router can be stable.
Thanks.
Dave.
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Per Yngve Berg
DD-WRT Guru


Joined: 13 Aug 2013
Posts: 5191
Location: Akershus, Norway

PostPosted: Sun Aug 05, 2018 17:46    Post subject: Reply with quote
Use the build with the K3.x kernel.

ftp://ftp.dd-wrt.com/betas/2018/07-28-2018-r36410/broadcom_K3X/dd-wrt.v24-36410_NEWD-2_K3.x-big-RT-N66U.trx
dmehler
DD-WRT Novice


Joined: 16 Aug 2009
Posts: 23

PostPosted: Mon Aug 06, 2018 2:53    Post subject: RTN66U Vap problems Reply with quote
Per Yngve Berg wrote:
Use the build with the K3.x kernel.

ftp://ftp.dd-wrt.com/betas/2018/07-28-2018-r36410/broadcom_K3X/dd-wrt.v24-36410_NEWD-2_K3.x-big-RT-N66U.trx

Thanks. I believe I tried this one and it didn't work, the 2.4 was gone when the public network came up on the 2.4. Are you not having this problem?
Appreciate.
Dave,
Per Yngve Berg
DD-WRT Guru


Joined: 13 Aug 2013
Posts: 5191
Location: Akershus, Norway

PostPosted: Mon Aug 06, 2018 8:00    Post subject: Reply with quote
Did you tick the reset option while flashing?

Do not erase nvram with this model.

There have been problems with disapoesring SSID wheb configuring VAPs with the 3 ptevious builds.
mynameisnobody
DD-WRT Novice


Joined: 27 Oct 2017
Posts: 29

PostPosted: Mon Aug 06, 2018 12:01    Post subject: Reply with quote
For the overly curious would you mind explaining why you write:

Per Yngve Berg wrote:
Do not erase nvram with this model.
(bold my emphasis)

I have upgraded in the past without either erasing nvram or even choosing reset from the GUI. I'd like to say I've done this without issues, but since October 2017 anything I've flashed after build 33525 has had problems.

For me erasing nvram does not seem to help (or hurt).

Choosing reset sometimes seems like it leaves settings in place from the last build... I'll need to confirm this.

BTW thank you for pointer about the issues with using channel 1 or 6 with a neighbor using channel 2. Going to channel 11 seems to have reduced the wireless drops.
dmehler
DD-WRT Novice


Joined: 16 Aug 2009
Posts: 23

PostPosted: Mon Aug 06, 2018 13:37    Post subject: Reply with quote
Per Yngve Berg wrote:
Did you tick the reset option while flashing?

Do not erase nvram with this model.

There have been problems with disapoesring SSID wheb configuring VAPs with the 3 ptevious builds.


Yes I did hit reset in the gui for the flash. I wonder why your build is working?

Unrelated, do you know the antenna specifications for the three antennas that come with the rt-n66u? Are these interchangeable? I've got a dead Netgear 6050 AC750 that also has three detachable antennas they are listed as 5dBi I was wondering if I could use them on the rt-n66u?

Back to dd-wrt have you had successes with other builds?
Thanks.
Dave.
mrlint
DD-WRT Novice


Joined: 21 Feb 2010
Posts: 12

PostPosted: Sat Aug 11, 2018 17:10    Post subject: RT-N66U first time flash Reply with quote
Hello. I'd like to get a feel for the first time load of ddwrt on the RT-N66U. I saw the old docs about how things were kinda weird, but also things seem much better now. Its been several years since i put ddwrt on anything. Have most ppl had good experience in there upgrade? And is there anything to currently be aware of before/after flashing?
audia3
DD-WRT Novice


Joined: 10 Mar 2018
Posts: 21

PostPosted: Sun Aug 12, 2018 18:49    Post subject: Reply with quote
Here's my two cents worth...

I use v3.0-r35531 big [03/26/18] because it's the latest BS build that I have used that can retain a consistent wifi and internet connection. Every subsequent build that I have tried, up to r36410, either has no wifi or wifi connections that lose internet after 5 to 10 minutes.

My setup is...

My Asus RT-N66U is a router for my tethered iPhone hotspot. I connect the iPhone through USB and I have an OpenVPN client on the router that connects to a Docker OpenVPN server that I run on a free micro instance at AWS.
lazardo
DD-WRT User


Joined: 17 Apr 2014
Posts: 101
Location: SF Bay Area

PostPosted: Mon Sep 03, 2018 19:47    Post subject: Reply with quote
audia3 wrote:
Here's my two cents worth...

I use v3.0-r35531 big [03/26/18] because it's the latest BS build that I have used that can retain a consistent wifi and internet connection. Every subsequent build that I have tried, up to r36410, either has no wifi or wifi connections that lose internet after 5 to 10 minutes.
...


Just wen't back to 34311-mega after trying most of the r36xxx series. Are you still happy with 35531?

Cheers,
audia3
DD-WRT Novice


Joined: 10 Mar 2018
Posts: 21

PostPosted: Mon Sep 03, 2018 20:51    Post subject: Reply with quote
lazardo wrote:
audia3 wrote:
Here's my two cents worth...

I use v3.0-r35531 big [03/26/18] because it's the latest BS build that I have used that can retain a consistent wifi and internet connection. Every subsequent build that I have tried, up to r36410, either has no wifi or wifi connections that lose internet after 5 to 10 minutes.
...


Just wen't back to 34311-mega after trying most of the r36xxx series. Are you still happy with 35531?

Cheers,


Earlier today, I decided to try 36808 (08/30/18) and so far it's working. I'll keep my fingers crossed!
sampalazno
DD-WRT Novice


Joined: 09 Dec 2015
Posts: 10

PostPosted: Sat Sep 08, 2018 20:44    Post subject: Reply with quote
audia3 wrote:

Earlier today, I decided to try 36808, 8/30/2018 and so far it's working. I'll keep my fingers crossed!


I am still getting these Wifi connection hangs running 36808, 08/30/2018 on my RT-N66U. (No firmware or configuration reset. But I am convinced it's not related to that because I have tried at least 3 or 4 other builds on duplicate RT-N66U configured clean / from scratch, and the problem persists on those.) Like others have reported, I have a VAP / VLAN setup: 2 SSID's on the router + 2 separate class C subnets. This setup used to work flawlessly and reliably for a couple of years before some build in late 2017 or early 2018 introduced whatever bug it is that is causing this.

In spite of my earlier posts a few months ago that I had a solid router + Wifi operation (which I posted too soon - only a couple hours after updated) -- in fact I have been experiencing the same flaky Wifi connections as everyone else is reporting. It is extremely annoying.

The problem does not seem to affect continuous network connections, like when playing a first-person shooter game on my iPad for hours on end, it never drops. Same when watching long youtube videos, no problems within the video itself.

The problem may be related to DNS in some way because it only seems to manifest mainly while web browsing, going from one link to another. When it freezes, I have to turn off WiFi on my laptop or mobile device for a couple of seconds, then turn it back on and the problem is cleared up.

I hope DDWRT devs will look into this as it is a persistent and very annoying issue that has been going on for many months now.

Let me know if I can be helpful w/ beta testing.
lazardo
DD-WRT User


Joined: 17 Apr 2014
Posts: 101
Location: SF Bay Area

PostPosted: Sat Sep 08, 2018 21:32    Post subject: Reply with quote
Also skipped 35531 for 36808 based on recent posts here, so far so good.
I'll update further in the build release thread after some real-world soak time, initial report is here:

https://forum.dd-wrt.com/phpBB2/viewtopic.php?p=1140576#1140576

CHeers,
sampalazno
DD-WRT Novice


Joined: 09 Dec 2015
Posts: 10

PostPosted: Sat Sep 08, 2018 21:34    Post subject: Reply with quote
lazardo wrote:
Also skipped 35531 for 36808 based on recent posts here, so far so good.
I'll update further in the build release thread after some real-world soak time, initial report is here:

https://forum.dd-wrt.com/phpBB2/viewtopic.php?p=1140576#1140576

CHeers,


Are you using VAPs or VLANs in your configuration? Just curious. It seems that mainly the VAP/VLAN configs are the ones affected by this persisting Wifi connection-hang bug.
lazardo
DD-WRT User


Joined: 17 Apr 2014
Posts: 101
Location: SF Bay Area

PostPosted: Sat Sep 08, 2018 22:11    Post subject: Reply with quote
sampalazno wrote:

Are you using VAPs or VLANs in your configuration? Just curious. It seems that mainly the VAP/VLAN configs are the ones affected by this persisting Wifi connection-hang bug.


Bog standard Gateway router setup with 5-7 active clients on both channels.
TechITEasy
DD-WRT Novice


Joined: 07 Jan 2015
Posts: 3

PostPosted: Mon Sep 10, 2018 1:56    Post subject: Stable build found! 28054 - updating wiki if good for 7 days Reply with quote
The WiFi bug (intermittent disconnects OR connection remains but unresponsive and "no internet") has been plaguing my setup since I put DD-WRT on this router back in 2016. I've tried countless WiFi settings adjustments and numerous firmware versions including (but not limited to) 33492, 35531, 35916, 36808 - all with frustrating WiFi. So I dug through this thread's history to where I found the first reporting of the WiFi bug - November 2015. Applying the firmware version from before the bug, DD-WRT v3.0-r28054 big (10/30/15), has yielded stable results for 12 hours now of pretty heavy usage Smile ... the longest span of stability I've experienced with this device! I'll update the wiki if this consistency remains for a full week of up-time and try to reach out to the development team to see if I can help troubleshoot the root cause.

Hope this helps fellow formerly-frustrated users!

Best,
-Mike
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