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The Graveyard - Products No Longer Supported => Routers => DIR-868L => Topic started by: mesa57 on August 09, 2015, 10:45:19 AM

Title: 2.4 Ghz wifi problem (rev. B)
Post by: mesa57 on August 09, 2015, 10:45:19 AM
I have a strange wifi problem with my dir-868l  rev. B (firmware 2.03)
My printer is connected via wifi to the 2.4 Ghz channel.
It works fine for a short time, but after about 10 minutes I get massive packet loss. A ping shows timeouts, but also some succesfull requests.
If I disable 2.4 Ghz and enable it again, everything works fine, for a few hours.
There is no interference of other routers nearby according to inSSID-er. I am the only one on the selected channel.
Leasetime is set at 240 mins., but I have set the printer to a fixed IP address in trying to solve this problem.

Can anyone advise what I should do ?

Example of pingplotter trace :
(http://content.screencast.com/users/mesa57/folders/Jing/media/6fa82dca-0ec3-497b-a18f-b7aab4546328/2015-08-09_2000.png)
Title: Re: 2.4 Ghz wifi problem (rev. B)
Post by: FurryNutz on August 09, 2015, 11:36:02 AM
Link>Welcome! (http://forums.dlink.com/index.php?topic=48135.0)


Internet Service Provider and Modem Configurations

What IP address is the printer set too?
What happens if you temporarily disable WPA on the router and have the printer connect to the OPEN SSID name? Same thing happens after 10 minutes?
Is the printers FW up to date?
What wireless modes are you using?
Is the printer the only device doing this?
What Mfr and model is the printer?
Title: Re: 2.4 Ghz wifi problem (rev. B)
Post by: mesa57 on August 10, 2015, 02:24:00 AM
First, thanks for the reply !
Ok, to answer you're questions :

- My region is Europe/Netherlands
- ISP is cable provider Ziggo
- Modem is an Ubee EVM3200 which is a modem only (no router)

- The IP address of the printer is set to 192.168.2.60, the DIR-868L is set to 192.168.2.254 dhcp range 192.168.2.61 - 192.168.2.253
- I will test disabling WPA later
- The printer firmware is up to date
- Wireless mode : 2.4 Ghz mixed 802.11g/n, channel auto (also tested with fixed channel), bandwidth 20 Mhz, transmission power high, security WPA-Personal
- The printer is the only device showing packet lost. Laptop connected to same channel works good. Android phones connected to 5 Ghz channel work fine.
- Printer mfr is Xerox model 6015NI

[update] Disabling security did not change anything :
(http://content.screencast.com/users/mesa57/folders/Jing/media/f0e925e6-3389-4ffd-a358-30f7b4e4ff14/2015-08-10_1306.png)
Title: Re: 2.4 Ghz wifi problem (rev. B)
Post by: FurryNutz on August 10, 2015, 07:30:27 AM
Can you disable the wireless connection on the printer then connect a LAN wired cable from the printer to the router? I do believe the printer supports a wired LAN connection...
Title: Re: 2.4 Ghz wifi problem (rev. B)
Post by: mesa57 on August 10, 2015, 08:04:48 AM
It indeed does support wired lan.
A test via wired lan reveals no packet loss as I expected (thats why I named the subject wifi problem) :

(http://content.screencast.com/users/mesa57/folders/Jing/media/ad83706d-761e-4de1-90f3-739d083ed50c/2015-08-10_1703.png)
Title: Re: 2.4 Ghz wifi problem (rev. B)
Post by: FurryNutz on August 10, 2015, 08:08:50 AM
Now the only other test to rule out the printers WiFi or the routers WiFi would be to test the the printer using a different router, if possible, to see if the problem follows or not. I presume if it does then you'll know either way.
Title: Re: 2.4 Ghz wifi problem (rev. B)
Post by: mesa57 on August 10, 2015, 08:24:44 AM
I purchased a second hand TP-LINK WN1043D for that, but it yet has to arrive.
Title: Re: 2.4 Ghz wifi problem (rev. B)
Post by: FurryNutz on August 10, 2015, 08:27:32 AM
Let us know the results of that...
Title: Re: 2.4 Ghz wifi problem (rev. B)
Post by: mesa57 on August 11, 2015, 09:54:47 AM
Ok, got my TP-Link and executed a test :
(http://content.screencast.com/users/mesa57/folders/Jing/media/705fd0e7-d717-4e58-ade3-e34c4992dc30/2015-08-11_1853.png)

Rocksolid apart from some minor glitches in the beginning.
Should I return my dir-868l for serviceing ?
Title: Re: 2.4 Ghz wifi problem (rev. B)
Post by: FurryNutz on August 11, 2015, 10:00:17 AM
I'd phone contact them and refer them to this thread and let them know what you have found between two different routers. I presume the 868L may need to be reviewed and looked at. Ask about and RMA.

Let us know how it goes.
Title: Re: 2.4 Ghz wifi problem (rev. B)
Post by: mesa57 on November 10, 2015, 12:07:27 PM
Phone is not available here in Europe. I decided to give up, as the printer wifi is pretty old (3 years). I took a tp-link wn 1043nd and it worked perfect. To prevent 2 routers from being active I decided to connect the printer with a cable. So the problem was never solved.
Recently (few days ago) the router developed a new problem : my WAN speed via cable which was 200 mbps dropped to 80 mbps.
Did a factory reset, helped a little, got 140 mbps, but still no 200 mbps. I will return the router now in waranty.
Title: Re: 2.4 Ghz wifi problem (rev. B)
Post by: FurryNutz on November 10, 2015, 12:14:42 PM
Thank you for the feed back. Sorry if we could not resolve this for you.
Title: Re: 2.4 Ghz wifi problem (rev. B)
Post by: mesa57 on November 10, 2015, 12:26:15 PM
No problem. However, I am disapointed with this router as it fails me so many times. That is not something I expected from D-Link.
Title: Re: 2.4 Ghz wifi problem (rev. B)
Post by: FurryNutz on November 10, 2015, 12:37:47 PM
Understand your frustration. Not all D-Link routers are like this. I wish you could have got the Rev A. SOLID router.
Title: Re: 2.4 Ghz wifi problem (rev. B)
Post by: mesa57 on November 10, 2015, 12:43:04 PM
O, I didn't tell that. Before this one I had a rev. A model for 3 weeks until wifi totally broke down (no signal at all). It was replaced by a rev. B router.
Title: Re: 2.4 Ghz wifi problem (rev. B)
Post by: FurryNutz on November 10, 2015, 12:48:48 PM
Hmm...may ahve been a faulty unit. I'm on my 2nd Rev A as I gave my 1st away as a gift.
Title: Re: 2.4 Ghz wifi problem (rev. B)
Post by: mesa57 on November 11, 2015, 04:54:25 AM
Strange thing happened :
For a test I have put my PC on the Qos list with the highest priority.
No difference in speed, but other PC's got sluggy during a download.
So I removed the Qos entry again : suddenly my router was on full speed again.

I also remembered that I put an other laptop previous week on the Qos list. But that one mysteriously vanished from the list.
After that my router became slow.

My conclusion : there must be something terribly wrong with the Qos system. Do not use it !
Title: Re: 2.4 Ghz wifi problem (rev. B)
Post by: FurryNutz on November 11, 2015, 06:19:08 AM
What FW is currently loaded?
What ISP speeds do you have UP and Down that you pay for?
How did you have QoS configured?
Title: Re: 2.4 Ghz wifi problem (rev. B)
Post by: mesa57 on November 11, 2015, 07:41:01 AM
Firmware is 2.03 (rev B)
My ISP speed is 200 Mpbs, but a fews days later after putting the notebook into Qos I discovered it dropped to 80 Mpbs. Up speed is 20 Mpbs.
In the new user interface for Rev. B, Qos is done by dragging a computer to one of the qos priority boxes (high, medium, low).
Or undo it by checking a delete cross.
I had dragged the notebook to the high priority box, but when I checked a few days later it was gone.
Title: Re: 2.4 Ghz wifi problem (rev. B)
Post by: FurryNutz on November 11, 2015, 07:51:55 AM
How about doing a factory reset, walk thru the set up wizard, then go directly into QoS set up the UP and Down speeds and save settings. IF this saves, go in and do a IP reservation on one test PC, save settings then put the one test pc in the high or highest section, save settings and reboot. Then test. I recommend wired lan cable connection for this test if you can.
Title: Re: 2.4 Ghz wifi problem (rev. B)
Post by: mesa57 on November 11, 2015, 10:29:34 AM
This his how the qos settings look in the new interface :
(http://content.screencast.com/users/mesa57/folders/Jing/media/cfd303f4-0e8a-4246-88db-e5019da591c0/2015-11-11_1928.png)
You cannot set anything, except move a node to one of the priority settings.
I have tried a factory reset, but I got a result that I didn't understand : 145 Mbps. More than before, but less than required.
Title: Re: 2.4 Ghz wifi problem (rev. B)
Post by: FurryNutz on November 11, 2015, 11:46:55 AM
So on your UI there is not user definable UP and Down link speeds at all?
Title: Re: 2.4 Ghz wifi problem (rev. B)
Post by: mesa57 on November 11, 2015, 12:32:45 PM
No, what you see is what you get.
I loved my rev. A router  :)
Title: Re: 2.4 Ghz wifi problem (rev. B)
Post by: FurryNutz on November 11, 2015, 12:53:05 PM
Ok, I recommend that you phone contact your regional D-Link support office and ask for help and information regarding this. Referenced this thread please. This needs to be looked at. We find that phone contact has better immediate results over using email.
Let us know how it goes please.
Title: Re: 2.4 Ghz wifi problem (rev. B)
Post by: mesa57 on November 11, 2015, 01:17:12 PM
In Europe no phone support is offered.
But I will try there "D-Link European Self Service Portal " later.
Title: Re: 2.4 Ghz wifi problem (rev. B)
Post by: FurryNutz on November 11, 2015, 02:07:13 PM
Not even the UK office?