Posted: Mon Feb 06, 2017 4:39 Post subject: AC68U 2.4GHZ slow and poor latency
Hi,
I have AC68U with Firmware: DD-WRT v3.0-r31205M kongac (02/03/17)
I am having issues with 2.4GHz performance
2.4GHz speed is 12mbps and latency > 80 ms
5GHz speed is 28mbps and latency is ~35ms
My ISP is 30mbps
This happens across computers.
Regulatory Domain: United States
Regulatory Mode: Off
TPC Mitigation Factor: OFF
What speed to get wired?
Have you enabled any other features?VPN/QoS etc..
Did you clean nvram after flashing to ddwrt? _________________ Linksys E3000
ASUS RT-AC68U
What speed to get wired?
Have you enabled any other features?VPN/QoS etc..
Did you clean nvram after flashing to ddwrt?
Wired is more less same as 5GHz (constrained by isp download speed)
I dont have any settings for VPN/QOS, etc
I cleared nvram after I reflashed the original TMO firmware and move to ASUS firmware. Afterwards I upgraded to dd-wrt and now on kong. I only cleared nvram as part of process of removing TMO firmware.
I dont want to lose all my settings (several access restrictions policies at home)
Windows 10 in several machines.
The strange part is that if I switch to 5GHz it works much better.
One thing, I did created a guest network on 2.4GHz and later deleted it since I thought it was causing some of the "occasional wifi lost" and also at some point several 2.4GHz stopped working
Windows 10 in several machines.
The strange part is that if I switch to 5GHz it works much better.
One thing, I did created a guest network on 2.4GHz and later deleted it since I thought it was causing some of the "occasional wifi lost" and also at some point several 2.4GHz stopped working
Why not stay with the 5GHz then?
2.4 GHz is usually pretty crowded ... did you check for neighborhood WLAN networks running on the same channel?
Windows 10 in several machines.
The strange part is that if I switch to 5GHz it works much better.
One thing, I did created a guest network on 2.4GHz and later deleted it since I thought it was causing some of the "occasional wifi lost" and also at some point several 2.4GHz stopped working
Why not stay with the 5GHz then?
2.4 GHz is usually pretty crowded ... did you check for neighborhood WLAN networks running on the same channel?
Many of the laptops only support 2.4GHz. Also, this is not an RF environment issue. I didnt have this problem on 2.4GHz with my previous router
I would start with erase nvram since you haven't done it under ddwrt for discarding vars issues. _________________ R6400v2 (boardID:30) - Kong 36480 running since 03/09/18 - (AP - DNSMasq - AdBlocking - QoS) R7800 - BS 31924 running since 05/26/17 - (AP - OpenVPN Client - DNSMasq - AdBlocking - QoS) R7000 - BS 30771 running since 12/16/16 - (AP - NAS - FTP - SMB - OpenVPN Server - Transmission - DDNS - DNSMasq - AdBlocking - QoS) R6250 - BS 29193 running since 03/20/16 - (AP - NAS - FTP - SMB - DNSMasq - AdBlocking)
I would start with erase nvram since you haven't done it under ddwrt for discarding vars issues.
Is it advisable to backup my settings, clear nvram and restore my settings?
It would if you come from a clean ddwrt build but since you would be doing a backup from a dirty nvram now, I wouldn't do it. What you could try is, do a backup, clear nvram, and then on that clean state test the 2.4 band, if it works good, try restoring and test again the 2.4 band, if it still works good then solved, if not probably it's something on the old nvram vars. _________________ R6400v2 (boardID:30) - Kong 36480 running since 03/09/18 - (AP - DNSMasq - AdBlocking - QoS) R7800 - BS 31924 running since 05/26/17 - (AP - OpenVPN Client - DNSMasq - AdBlocking - QoS) R7000 - BS 30771 running since 12/16/16 - (AP - NAS - FTP - SMB - OpenVPN Server - Transmission - DDNS - DNSMasq - AdBlocking - QoS) R6250 - BS 29193 running since 03/20/16 - (AP - NAS - FTP - SMB - DNSMasq - AdBlocking)
go to settings / wireless, change to wl0 in the menu and run site survey.
Check how many wireless network in the area on the same channel you are running and see if you have any not used.
I had similar issues, eventually I chose
channel 3
NG mixed
wide 40mhz
channel ext upper
solved my issues _________________ Netgear R9000 main router
RAX80 as AP
ok, I am desperate. My isp is 30mbps
1. I did an nvram reset and manually added my settings one by one. Still slow 2.4ghz. Good (maxed) wired and 5GHz was good too
2. I reloaded the brainslayer build mentioned on the wiki. Same problem
I have only set ch=9 (per survey), 40mhz, ng mixed, lower. Everything else is the same
I am sitting 6 feet away from the router with nothing in between.
2.4GHz only gets to 11mbps.
5GHz gets to 29.6mbps.
Is my router broken?
Only use 20mhz for the 2.4 band too much interference when using 40, too many overlapping channels. Also, it's best to use channel 1,6 or 11. _________________ I am far from a guru, I'm barely a novice.
I will retest in the following days. I run out of time today. Also, I started to get good speeds (2.4GHz at 29.6mbps). Strange... before issues were while testing back to back 2.4ghz, 5ghz, lan.
I don't think that channels have anything to do. I am IN FRONT of the router, 6 feet away. I live in a detached home and this is the only router here. I can not remotely believe that in this unrealistic situation, wifi neighbors have anything to do. Maybe if I was trying to download 150mbps and getting 140mbps. But getting less than 1/10th of that in front of the router? (as I mentioned ISP speeds are only 30mbps but I was getting just about that with 5ghz and lan)
I also downloaded an app to test local download speed over wifi but I will test next time.