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TP-LINK W8968 intermittent high latency and traffic drops

Napalm2880

Expert Member
Joined
Mar 8, 2007
Messages
1,626
#1
Hi Guys,

I noticed a few weeks ago that every minute or so I get high pings when playing DOTA2. Initially I blamed Afrihost but after some investigation I realised that I'm getting intermittent spikes in latency and traffic drops from my WIFI.

I've tested the WIFI from two different PC's with the same results. I had "TD-W8968_V3_140821" and updated the firmware to "TD-W8968_V3_150205" which was released 5th Feb 2015 and it made no difference at all.

Also, my WIFI region was set to United States and changing it to South Africa didn't make much of a difference either. The rest of the settings are default:
Channel: AUTO.
Mode: 11bgn
Bandwidth: 20/40Mhz
WMM: enabled
Auth: WPA2
WPA encrypt: AES

Reply from 192.168.1.1: bytes=32 time=2ms TTL=64
Reply from 192.168.1.1: bytes=32 time=3ms TTL=64
Reply from 192.168.1.1: bytes=32 time=2ms TTL=64
Reply from 192.168.1.1: bytes=32 time=2ms TTL=64
Reply from 192.168.1.1: bytes=32 time=2ms TTL=64
Reply from 192.168.1.1: bytes=32 time=2ms TTL=64
Reply from 192.168.1.1: bytes=32 time=2ms TTL=64
Reply from 192.168.1.1: bytes=32 time=2ms TTL=64
Reply from 192.168.1.1: bytes=32 time=2ms TTL=64
Reply from 192.168.1.1: bytes=32 time=2ms TTL=64
Reply from 192.168.1.1: bytes=32 time=2ms TTL=64
Reply from 192.168.1.1: bytes=32 time=2ms TTL=64
Reply from 192.168.1.1: bytes=32 time=54ms TTL=64
Reply from 192.168.1.1: bytes=32 time=31ms TTL=64
Reply from 192.168.1.1: bytes=32 time=39ms TTL=64
Reply from 192.168.1.1: bytes=32 time=1ms TTL=64
Reply from 192.168.1.1: bytes=32 time=41ms TTL=64
Reply from 192.168.1.1: bytes=32 time=1ms TTL=64
Reply from 192.168.1.1: bytes=32 time=22ms TTL=64
Reply from 192.168.1.1: bytes=32 time=1ms TTL=64
Reply from 192.168.1.1: bytes=32 time=16ms TTL=64
Reply from 192.168.1.1: bytes=32 time=2ms TTL=64
Reply from 192.168.1.1: bytes=32 time=1ms TTL=64
Reply from 192.168.1.1: bytes=32 time=1ms TTL=64
Reply from 192.168.1.1: bytes=32 time=2ms TTL=64
Reply from 192.168.1.1: bytes=32 time=2ms TTL=64
Reply from 192.168.1.1: bytes=32 time=2ms TTL=64
Reply from 192.168.1.1: bytes=32 time=2ms TTL=64
Reply from 192.168.1.1: bytes=32 time=2ms TTL=64
Reply from 192.168.1.1: bytes=32 time=2ms TTL=64
Reply from 192.168.1.1: bytes=32 time=2ms TTL=64

Anyone else got a similar issue with this router or any ideas on what to try next?
 

Level7

Level-7 Representative
Company Rep
Joined
May 8, 2013
Messages
304
#2
Hi Guys,

I noticed a few weeks ago that every minute or so I get high pings when playing DOTA2. Initially I blamed Afrihost but after some investigation I realised that I'm getting intermittent spikes in latency and traffic drops from my WIFI.

I've tested the WIFI from two different PC's with the same results. I had "TD-W8968_V3_140821" and updated the firmware to "TD-W8968_V3_150205" which was released 5th Feb 2015 and it made no difference at all.

Also, my WIFI region was set to United States and changing it to South Africa didn't make much of a difference either. The rest of the settings are default:
Channel: AUTO.
Mode: 11bgn
Bandwidth: 20/40Mhz
WMM: enabled
Auth: WPA2
WPA encrypt: AES

Reply from 192.168.1.1: bytes=32 time=2ms TTL=64
Reply from 192.168.1.1: bytes=32 time=3ms TTL=64
Reply from 192.168.1.1: bytes=32 time=2ms TTL=64
Reply from 192.168.1.1: bytes=32 time=2ms TTL=64
Reply from 192.168.1.1: bytes=32 time=2ms TTL=64
Reply from 192.168.1.1: bytes=32 time=2ms TTL=64
Reply from 192.168.1.1: bytes=32 time=2ms TTL=64
Reply from 192.168.1.1: bytes=32 time=2ms TTL=64
Reply from 192.168.1.1: bytes=32 time=2ms TTL=64
Reply from 192.168.1.1: bytes=32 time=2ms TTL=64
Reply from 192.168.1.1: bytes=32 time=2ms TTL=64
Reply from 192.168.1.1: bytes=32 time=2ms TTL=64
Reply from 192.168.1.1: bytes=32 time=54ms TTL=64
Reply from 192.168.1.1: bytes=32 time=31ms TTL=64
Reply from 192.168.1.1: bytes=32 time=39ms TTL=64
Reply from 192.168.1.1: bytes=32 time=1ms TTL=64
Reply from 192.168.1.1: bytes=32 time=41ms TTL=64
Reply from 192.168.1.1: bytes=32 time=1ms TTL=64
Reply from 192.168.1.1: bytes=32 time=22ms TTL=64
Reply from 192.168.1.1: bytes=32 time=1ms TTL=64
Reply from 192.168.1.1: bytes=32 time=16ms TTL=64
Reply from 192.168.1.1: bytes=32 time=2ms TTL=64
Reply from 192.168.1.1: bytes=32 time=1ms TTL=64
Reply from 192.168.1.1: bytes=32 time=1ms TTL=64
Reply from 192.168.1.1: bytes=32 time=2ms TTL=64
Reply from 192.168.1.1: bytes=32 time=2ms TTL=64
Reply from 192.168.1.1: bytes=32 time=2ms TTL=64
Reply from 192.168.1.1: bytes=32 time=2ms TTL=64
Reply from 192.168.1.1: bytes=32 time=2ms TTL=64
Reply from 192.168.1.1: bytes=32 time=2ms TTL=64
Reply from 192.168.1.1: bytes=32 time=2ms TTL=64

Anyone else got a similar issue with this router or any ideas on what to try next?
Try setting your channel to a manual frequency the router could be changing channels when you get those spikes.
 

Napalm2880

Expert Member
Joined
Mar 8, 2007
Messages
1,626
#3
Try setting your channel to a manual frequency the router could be changing channels when you get those spikes.
Just tested setting the Channel to 9 and I'm still hitting the same issue with intermittent high latency. Thanks though. Good suggestion.

Any other ideas on what could be causing this?
 

Nether

Expert Member
Joined
Jan 15, 2007
Messages
1,208
#4
Same issue here with my Tplink TD-W8961N wifi, I had to replace me dirt cheap Asus router due to lightning.

Noticed when I plugged in the network cable everything was fine, but the wifi would just stop tranmitting intermediatly.

I also have to reconnect my phone when the connection doesn't work (you get full reception and it looks stable, but isn't).

Thats when I knew the wifi was the culprit, updating the firmware has had no effect.

Also, the wifi range is rather poor, even with the 2 receivers... my old Asus router kicked its ass.
 

Napalm2880

Expert Member
Joined
Mar 8, 2007
Messages
1,626
#5
This is really frustrating because I had issues with the WIFI on my Billion W40 before this. If I had too many torrents running, the router would lock up. Bought the TP-Link because I figured I would be better off. :crying:
 

Level7

Level-7 Representative
Company Rep
Joined
May 8, 2013
Messages
304
#6
This is really frustrating because I had issues with the WIFI on my Billion W40 before this. If I had too many torrents running, the router would lock up. Bought the TP-Link because I figured I would be better off. :crying:
Does switching between 20/40mhz help at all? Have you tried different fixed channels?
 

willsotaku

Well-Known Member
Joined
Mar 3, 2015
Messages
348
#8
FIXED!!! So.... I have the choice between 20Mhz and 20/40Mhz (default).

Setting it to 20Mhz fixed my problem. Any idea what this feature actually does?
40Mhz is generally a wider wireless Width used with N range to provide more bandwidth but if you have interference or LoS problems it helps to reduce it to low as possible thus being 20mhz for you...being 2.4GHZ you must have some serious interference from somewhere and you would be best served by 5GHZ since other channels did not work...i take it you live in a complex or something where alot of people are close together?
 

Napalm2880

Expert Member
Joined
Mar 8, 2007
Messages
1,626
#10
40Mhz is generally a wider wireless Width used with N range to provide more bandwidth but if you have interference or LoS problems it helps to reduce it to low as possible thus being 20mhz for you...being 2.4GHZ you must have some serious interference from somewhere and you would be best served by 5GHZ since other channels did not work...i take it you live in a complex or something where alot of people are close together?
I think you're right, there's definitely interference coming from the neighbors and nearby appliances. Sadly the TP-Link W8968 doesn't support 5Ghz so I'm stuck with the 2.4Ghz channels. Hopefully the 20Mhz bandwidth setting is a permanent fix. I'll report back here with the results - hopefully the WIFI performance isn't too much slower.
 

cenredash

Expert Member
Joined
Jan 21, 2010
Messages
2,113
#11
I think you're right, there's definitely interference coming from the neighbors and nearby appliances. Sadly the TP-Link W8968 doesn't support 5Ghz so I'm stuck with the 2.4Ghz channels. Hopefully the 20Mhz bandwidth setting is a permanent fix. I'll report back here with the results - hopefully the WIFI performance isn't too much slower.
Hi napalm, any updates? :)

I was pulling out my hair with this wifi issue .. .am at work but will make the change to 20Mhz when i get home and see if that solves my problem, but just interested to see if your issue was resolved .. or if i need to look elsewhere!
 

Napalm2880

Expert Member
Joined
Mar 8, 2007
Messages
1,626
#12
Hi napalm, any updates? :)

I was pulling out my hair with this wifi issue .. .am at work but will make the change to 20Mhz when i get home and see if that solves my problem, but just interested to see if your issue was resolved .. or if i need to look elsewhere!
On my 3rd router now and the WIFI issues still seem to persist. I'm putting it down to interference (unknown source) and switched to using power-line adapters. Just a tip on the power-line devices - don't daisy chain them from the wall socket using a multi-plug, rather plug them directly into the wall socket for best performance. Had a good little cry when I switched from my flakey WIFI setup to the power-line adapters and I was still seeing random high latency, finally figured out the multi-plug was the problem.
 

SwiftFibreGuy

SwiftFibre Networks
Company Rep
Joined
Sep 15, 2016
Messages
20
#13
finally figured out the multi-plug was the problem.
Pretty sure the manual says not to use a multiplug too, the Powerline devices need to be in mains power.

If you can, have you tested the ping from the router itself, or while cabled over Ethernet? You can get apps to check the local wifi frequency usage, adn make suggestions on the best channel to move to, to avoid interference. Also, is your router able to breathe? It needs airflow!

You might be choking your router, depending on the number of devices connected, their connection quality and amount of local and outbound traffic. Cheap consumer routers are not able to handle a LOT of traffic, torrents can easily max out its buffer.
 

NorthPole

Well-Known Member
Joined
Feb 7, 2013
Messages
344
#14
I suspect it is that model. My WIFI drops like 3m away from it... use it as my modem and use another router with as dead DSL port for WIFI.
 
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