New Build - 10/02/2020 - r44483

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gourone
DD-WRT Novice


Joined: 31 Jan 2020
Posts: 1

PostPosted: Fri Oct 09, 2020 8:32    Post subject: Reply with quote
Router/Version: Linksys WRT1900ACS v2
Firmware: DD-WRT v3.0-r44483 std (10/02/20)
Issue: the same as previous, unstable 5Ghz VHT80 on various devices.
Sponsor
pbphoto
DD-WRT User


Joined: 29 Oct 2017
Posts: 104

PostPosted: Mon Oct 12, 2020 22:38    Post subject: Reply with quote
Upgraded from 44048 without issues via GUI - did an "erase nvram" from the CLI and reconfigured both devices manually.

Issues: Wifi is still unreliable for me. With 5ghz 80-wide channels, performance is great and stable for a while but then wifi connections go into a zombie state for iphones and macbooks (maybe others as well). Recycling the wifi on the client fixes it right away but it doesn't last long.

My working theory is that it is related to roaming between APs. This would explain why it affects iphones and laptops as they are carried around the house. I left my primary 3200ACM at 44483 and fell back to 44048 on the 1900ACSv1.

Wireguard client: Using Mullvad client config following parts of Hellakenut's "idiots guide for commercial clients" and egc's updated guide to eliminate the startup script.

Kernel:

3200ACM: Linux 4.9.237 #2128 SMP Fri Oct 2 00:43:25 +03 2020 armv7l
1900ACS: Linux 4.9.231 #1979 SMP Sun Aug 2 03:35:09 +03 2020 armv7l

Linksys WRT3200ACM: gateway mode, DNSMasq for DNS and DHCP, Wireguard client (Mullvad), Firewall enabled, QoS enabled HTB-CAKE, PBR enabled (SFE disabled). WIFI: 2.4ghz: NG-mixed, 20mhz channel width, channel 1, WPA2-CCMP-128. 5ghz: AC/N mixed, 80mhz channel width, channel 100+upper, WPA2-CCMP-128.

Linksys WRT1900ACSv1: router mode, hardwired ethernet lan to WRT3200ACM above. WIFI: 2.4ghz: NG-mixed, 20mhz channel width, channel 11, WPA2-CCMP-128. 5ghz: AC/N mixed, 80mhz channel width, channel 36+upper, WPA2-CCMP-128.

Clients: Apple MACOS x 4, IOS x 4, Apple TV, Chromecast Audio x 2, Eufy doorbells, Lutron Caseta, Axis Camera, Samsung TV, Nest thermostat, EtekCity outlets (Espressif)..
blkt
DD-WRT Guru


Joined: 20 Jan 2019
Posts: 1800

PostPosted: Tue Oct 13, 2020 7:07    Post subject: Reply with quote
pbphoto wrote:
...did an "erase nvram" from the CLI and reconfigured both devices manually.

The command erase nvram is old, not recommended, and some Linksys routers risk losing factory default data.

For any model, a reboot after erase nvram writes some config data stored in RAM, defeating the entire purpose.

The correct command to use behaves differently, see the wiki for nvram erase && reboot.

The order of two words produces very different results.
PrimaTMan
DD-WRT Novice


Joined: 13 Oct 2020
Posts: 3

PostPosted: Tue Oct 13, 2020 18:47    Post subject: Reply with quote
Linksys WRT1900ACSv1
webflash: ddwrt-linksys-wrt1900acs-webflash (from: r41954)

Issues:
--> OpenVPN (ExpressVPN) DNS server with DNSMasq.
VPN DNS server was added auto in 'resolv.dnsmasq' file.

Solved by adding at 'Additional Config': route-nopull
Now VPN DNS is not added/used anymore for other networks.

--> Lots of Wifi drops 5ghz + 2.4ghz after update.
Very frustrating.

Related to kind of Wifi roaming(?) Disassociate of devices after idle time (in syslog).

Solved (for now) by changing 'disassoc_low_ack=0
' in 'ath0_hostap.conf' + 'ath1_hostap.conf'.
Created startup script for this.


Everything else (also Wifi finally) stable for now.
pbphoto
DD-WRT User


Joined: 29 Oct 2017
Posts: 104

PostPosted: Tue Oct 13, 2020 19:14    Post subject: Reply with quote
Could you post that script by any chance?
PrimaTMan
DD-WRT Novice


Joined: 13 Oct 2020
Posts: 3

PostPosted: Tue Oct 13, 2020 20:57    Post subject: Reply with quote
pbphoto wrote:
Could you post that script by any chance?


For both Wifi.

#!/bin/sh
sleep 10
sed -i 's/disassoc_low_ack=1/disassoc_low_ack=0/' /tmp/ath0_hostap.conf
sed -i 's/disassoc_low_ack=1/disassoc_low_ack=0/' /tmp/ath1_hostap.conf
hostapd -B -P /var/run/ath0_hostapd.pid /tmp/ath0_hostap.conf
hostapd -B -P /var/run/ath1_hostapd.pid /tmp/ath1_hostap.conf

I enabled jfffs for this and put this script in /jffs/etc/config: hostapd_dissac.startup
Don’t forget ‘chmod 700’ to enable execution prop.
pbphoto
DD-WRT User


Joined: 29 Oct 2017
Posts: 104

PostPosted: Tue Oct 13, 2020 21:32    Post subject: Reply with quote
thank you. I haven't used SED in years - brings back memories....
blkt
DD-WRT Guru


Joined: 20 Jan 2019
Posts: 1800

PostPosted: Wed Oct 14, 2020 11:31    Post subject: Reply with quote
@PrimaTMan your posts are very helpful, thank you.

It reminded me of this old monster of a ticket.

https://svn.dd-wrt.com/ticket/6481
PrimaTMan
DD-WRT Novice


Joined: 13 Oct 2020
Posts: 3

PostPosted: Wed Oct 14, 2020 11:44    Post subject: Reply with quote
blkt wrote:
@PrimaTMan your posts are very helpful, thank you.

It reminded me of this old monster of a ticket.

https://svn.dd-wrt.com/ticket/6481



Interesting. I will have a look at it.
Does 'closed (invalid)' mean anything?

Meanwhile...

Although much more stable with the 'disassoc_low_ack=0' fix still having issues sometimes on Wifi

Devices which are 'left' after usage sometimes do not reconnect (fast enough) again after reactivating.
Probable only when reactived in 'bad' receiption areas. Will further monitor this.
ddbob
DD-WRT Novice


Joined: 02 Jan 2009
Posts: 24

PostPosted: Sat Oct 24, 2020 15:32    Post subject: Reply with quote
Router/Version: Linksys WRT1900ACSv2
File: ddwrt-linksys-wrt1900acsv2-webflash.bin (no nvram erase)
Kernel: Linux 4.9.237 #2128 SMP Fri Oct 2 00:43:25 +03 2020 armv7l
Mode: AP, NAS, OpenVPN Server
Temperatures: CPU 63.2 °C / WL0 37.3 °C / WL1 38.8 °C
Status: mostly working
Upgraded from r43306 std (05/31/2020)
Internet speed: 2.3 Mb/s (expect 200 Mb/s)
LAN speed: 967 Mb/s (previous was 883 Mb/s, new record!)
WiFi speed (2.4 Ghz): 26 Mb/s (previous was 70 Mb/s, record is 141)
WiFi speed (5 Ghz): 65 Mb/s (previous 113 Mb/s, record is 142)
WiFi devices
- printer (2.4GHz) - ping from LAN is 88ms, 0% packet loss (uptime 10 minutes)
- printer (2.4GHz) - ping from LAN is 6ms, 0% packet loss (uptime 27 minutes)
- iPad (2.4 Ghz) - working
- Android phone (2.4/5Ghz) - working
- Macbook (5GHz) - working
- Chromecast (5GHz) - working
OpenVPN server is working
NAS not working because USB thumbdrive not recognized

I did disable and re-enable USB storage, but that did not seem to help.

EDIT: The USB thumbdrive was not connected. Now that it is connected, it is mounted as expected. However, samba is not working.

EDIT 2 (2020-Oct-31): Lots of dropped connections with Wifi, trying 44048
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