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Author Topic: Slow Internet speed when using the DIR-855L  (Read 4911 times)

Pandati

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Slow Internet speed when using the DIR-855L
« on: March 15, 2016, 06:45:24 PM »

Hi,

I already tried to reach out to the support by email but I'm posting here in case someone solved this issue.

Since I bought my new DIR-855L, the wired/wireless Internet speed has been very slow. I have fiber (Coextro in Canada) and if I plug my laptop directly to the wall using a gigabit ethernet cable, I can reach 120mbps+; with the same ethernet cable and through the D-Link routeur I can't even reach 1, everything is very laggy. File transfers inside the local network are fast though, over ethernet and wireless. 

I tried:
- Updating the firmware to the latest version
- Reverting to  Firmware Version: 1.01
- Reset with no customization
- A different electric wall plug
- A voodoo incatation next to it
- Validated that QoS is disabled
- Disabled Wifi to use only Ethernet

Nothing worked... Any ideas welcome :)

Thanks!
« Last Edit: March 15, 2016, 07:00:36 PM by Pandati »
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FurryNutz

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Re: Slow Internet speed when using the DIR-855L
« Reply #1 on: March 16, 2016, 07:32:19 AM »

Link>Welcome!

  • What Hardware version is your router? Look at sticker under the router case.
  • Link>What Firmware version is currently loaded? Found on the routers web page under status.
  • What region are you located?
  • Has a Factory Reset been performed?
  • Was a Factory Reset performed before and after any firmware updates then set up from scratch?
  Link> >FW Update Process


Internet Service Provider and Modem Configurations
  • What ISP Modem Mfr. and model # do you have?
  • What ISP Modem service link speeds UP and Down do you have? Link> Speed Testing Sites
  • Check cable between Modem and Router and PC, swap out to be sure. Link> Cat6 is recommended.
  • Check ISP MTU requirements, Cable is usually 1500, DSL is around 1492 down to 1472. Call the ISP and ask. Link>Checking MTU Values
  • For DSL/PPPoE connections on the router, ensure that "Always ON" option is enabled.
  • If the ISP modem has a built in router, it's best to bridge the modem. Having 2 routers on the same line can cause connection problems: Link>Double NAT and How NAT Works. Call the ISP and ask to see if the ISP modem can be bridged. To tell if the modem is bridged or not, look at the routers web page, Status/Device Info/Wan Section, if there is a 192.168.0.# address in the WAN IP address field, then the modem is not bridged. If the modem can't be bridged then see if the modem has a DMZ option and input the IP address the router gets from the modem and put that into the modems DMZ. Also check the routers DHCP IP address maybe conflicting with the ISP modems IP address of 192.168.0.1. Check to see if this is the same on the ISP modem, and if modem can't be bridged, change the DIR router to 192.168.1.1 or .0.254.

Router and Wired Configurations
Some things to try: - Log into the routers web page at 192.168.0.1. Use IE, Opera or FF to manage the router. Besure to log into the Admin account on the router.
  • Turn off Advanced DNS Services if you have this option under Setup/Internet/Manual or under Setup/PARENTAL CONTROL/Set to>None: Static IP or Obtain Automatically From ISP.
  • Enable or Disable Use Unicasting (compatibility for some ISP DHCP Servers) and test under Setup/Internet/Manual. Disable may help with speed performance on higher speed ISP services.
  • Turn on or off DNS Relay under Setup/Networking. Link>Finding Faster DNS Addresses using Name Bench and input new DNS addresses under Setup/Internet/Manual.
  • Setup DHCP reserved IP addresses for all devices ON the router. Setup/Networking. This ensures each devices gets its own IP address when turned on and connected, eliminates IP address conflicts and helps in troubleshooting and maintain consistency for applications that need to connect as well as mapped drives.
  • Ensure devices are set to auto obtain an IP address.
  • If IPv6 is an option on the router, select Local Connection Only under Setup/IPv6.
  • Set Firewall settings to Endpoint Independent for TCP and UDP under Advanced/Firewall. Or Disable SPI to test.
  • Enable uPnP and Multi-cast Streaming under Advanced/Networking. Disable uPnP for testing Port Forwarding rules. Enable IPv6 Multi-cast Streaming for routers that have a Media Server option. Disable IPv6 Multi-cast Streaming if IPv6 or Media Server is not being used.
  • Turn off WISH, and WPS under Advanced.
  • WAN Port Speed set to Auto or specific speed? Some newer ISP modems support 1000Mb so manually setting to Gb speeds can be supported by the router. Advanced/Advanced Networking/WAN Port Speed
>WAN and LAN Connection Rates and ISP Speeds FAQ
  • Set current Time Zone, Date and Time. Use an NTP Server feature. The DST setting is only needed in the NA region. Tools/Time.
  • Any other WiFi routers in the area that maybe causing interferences? Link> Use a WiFi Scanner to find out. How many?

Router Placement
Forum User - "Well I feel really dumb. After moving the router away from other electronic devices my speeds are back to normal. Just a heads up for anyone experiencing slow speeds, you might want to move it away from other electronics and see if that helps."
3-6' feet minimum safe distance between devices.
Placement on main level floor and central in the building and WELL ventilated is preferred. Not in basements or closets as building materials, or near by electronics devices could interfere or hinder good signal propagation.
http://www.smallnetbuilder.com/wireless/wireless-basics/31083-smallnetbuilders-wireless-faq-the-essentials
http://www.foxnews.com/tech/2015/10/27/how-to-get-stronger-wi-fi-signal.html?icid=maing-grid7|main5|dl31|sec1_lnk3%26pLid%3D1839803170
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Pandati

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Re: Slow Internet speed when using the DIR-855L
« Reply #2 on: March 16, 2016, 06:42:50 PM »

Thanks for your reply, much appreciated! Here are more information:


  • What Hardware version is your router? Look at sticker under the router case.
A1
  • Link>What Firmware version is currently loaded? Found on the routers web page under status.
1.01, I was using the latest but reverted to give it a try
  • What region are you located?
Canada
Yes
  • Was a Factory Reset performed before and after any firmware updates then set up from scratch?
  Link> >FW Update Process Yes, using a paper clip in the tiny hole each time


Internet Service Provider and Modem Configurations
  • What ISP Modem Mfr. and model # do you have?
No modem, I plug the router in my wall
Paying for 100mbps ,when I plug in the wall usually have between 110mbps and 150mbps without using the router
  • Check ISP MTU requirements, Cable is usually 1500, DSL is around 1492 down to 1472. Call the ISP and ask. Link>Checking MTU Values
Not done yet, is it relevant or for cable only?

Router and Wired Configurations
  • Turn off Advanced DNS Services if you have this option under Setup/Internet/Manual or under Setup/PARENTAL CONTROL/Set to>None: Static IP or Obtain Automatically From ISP.
Advanced DNS is off
  • Enable or Disable Use Unicasting (compatibility for some ISP DHCP Servers) and test under Setup/Internet/Manual. Disable may help with speed performance on higher speed ISP services.
Tried both
I tried using my ISP DNS and OpenDNS

  • If IPv6 is an option on the router, select Local Connection Only under Setup/IPv6.
I set it to local connection
  • Set Firewall settings to Endpoint Independent for TCP and UDP under Advanced/Firewall. Or Disable SPI to test.
Disabled
  • Turn off WISH, and WPS under Advanced.
Disabled
  • WAN Port Speed set to Auto or specific speed?
Tried 100 and 1000
  • Set current Time Zone, Date and Time. Use an NTP Server feature. The DST setting is only needed in the NA region. Tools/Time.
Not done yet
[/list][/list][/list]
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FurryNutz

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Re: Slow Internet speed when using the DIR-855L
« Reply #3 on: March 17, 2016, 06:53:25 AM »

And you swapped LAN cables between the PC and router and wall out let?

Only thing I can think of is that this unit maybe faulty. If your getting ISP spec speeds directly connected to the wall and not when the router is in line, something maybe bad on the router.
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Pandati

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  • Posts: 3
Re: Slow Internet speed when using the DIR-855L
« Reply #4 on: March 19, 2016, 12:53:33 PM »

Hi, thank you again for your help. I brought back the 855L to Best Buy, got a refund and bought the 860L. Everything is working fine now, no idea of what was wrong with the 855L...

http://www.speedtest.net/my-result/5181747478
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FurryNutz

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Re: Slow Internet speed when using the DIR-855L
« Reply #5 on: March 19, 2016, 12:58:17 PM »

I presume the 855L may have been a faulty unit. Glad the 860L is working. Enjoy.  ;)
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