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Author Topic: DIR-885L Internet Speed is slower after setup  (Read 561 times)

louij2

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DIR-885L Internet Speed is slower after setup
« on: December 22, 2017, 08:27:48 AM »

Hi my internet speed is much slower than my older Apple Airport Extreme? Running Google DNS.
The results are the same on Wi-Fi and Gigabit Ethernet
Quote

You can see it goes from over 200Mbps and drops on 22/12/17 where I installed the new router.
« Last Edit: December 22, 2017, 08:29:22 AM by louij2 »
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FurryNutz

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Re: DIR-885L Internet Speed is slower after setup
« Reply #1 on: December 22, 2017, 10:09:08 AM »

What FW version do you have loaded currently?

What region are you located?

What is the Mfr and model# of the ISP Modem?

Is QoS enabed on the DIR router?
« Last Edit: December 22, 2017, 10:22:26 AM by FurryNutz »
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Cable:200mb/10Mb>Motorola MB7420>COVR3902>HP 24pt Gb Switch. 3xDGL-4500s,DIR-857,835,827,815,890L,880L,868L,865L,836L,810L,685,657,3x655s,645,628,601,DNR-202L,DNS-345,DCS-933L,936L and 960L.
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louij2

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Re: DIR-885L Internet Speed is slower after setup
« Reply #2 on: December 22, 2017, 12:20:37 PM »

FW: 1.20
London UK
Virgin Media Super Hub 3.0 Modem
QoS is disabled

It was fast (200Mbps) after I changed the channels but then I went out for dinner and its become slow again (2Mbps)
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louij2

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Re: DIR-885L Internet Speed is slower after setup
« Reply #3 on: December 22, 2017, 12:23:41 PM »

It is also not auto assigning IP addresses to some devices?
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FurryNutz

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Re: DIR-885L Internet Speed is slower after setup
« Reply #4 on: December 22, 2017, 12:26:03 PM »

Is your Virgin ISP modem in router mode or bridged? If in router mode, your in a double NAT condition. Try to bridge the modem or if you can't, use the DMZ on the modem/router for the IP address that it gives the DIR router.

Disable all wireless on the ISP modem/router as well.
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Cable:200mb/10Mb>Motorola MB7420>COVR3902>HP 24pt Gb Switch. 3xDGL-4500s,DIR-857,835,827,815,890L,880L,868L,865L,836L,810L,685,657,3x655s,645,628,601,DNR-202L,DNS-345,DCS-933L,936L and 960L.
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louij2

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Re: DIR-885L Internet Speed is slower after setup
« Reply #5 on: December 22, 2017, 12:43:40 PM »

It is a router in "Modem mode", so it is not giving off any wireless network. I'd have to connect to the modem with ethernet to change anything. I'm using DHCP so it should just work?
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louij2

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Re: DIR-885L Internet Speed is slower after setup
« Reply #6 on: December 22, 2017, 12:49:56 PM »

I've also gotten a new Public IP after changing the router to the DIR one
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louij2

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Re: DIR-885L Internet Speed is slower after setup
« Reply #7 on: December 23, 2017, 03:32:31 AM »

My new router also decided to turn off the 5Ghz network for some off reason at around 1am
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louij2

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Re: DIR-885L Internet Speed is slower after setup
« Reply #8 on: December 23, 2017, 05:20:49 AM »

Okay so sometimes its fast and sometimes its slow?
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FurryNutz

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Re: DIR-885L Internet Speed is slower after setup
« Reply #9 on: December 23, 2017, 10:24:00 AM »

  • Any 2.4Ghz or 5Ghz cordless house phones or WiFi APs near by that maybe causing interferences?
  • Any other WiFi routers in the area that maybe causing interferences? Link> Use a WiFi Scanner to find out. How many? And what channels are they using?
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Cable:200mb/10Mb>Motorola MB7420>COVR3902>HP 24pt Gb Switch. 3xDGL-4500s,DIR-857,835,827,815,890L,880L,868L,865L,836L,810L,685,657,3x655s,645,628,601,DNR-202L,DNS-345,DCS-933L,936L and 960L.
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louij2

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Re: DIR-885L Internet Speed is slower after setup
« Reply #10 on: December 24, 2017, 02:14:47 PM »

https://drive.google.com/file/d/1U6l8rgu_oq2b3tRKucBUTVG_b6g3-hYP/view?usp=sharing
https://drive.google.com/file/d/1__ip0K1QSKOCUIVhqEHhUGbc-yU3lucr/view?usp=sharing
https://drive.google.com/file/d/1NtSsUJCL0wcC2ceIResrocAPo5JnYGUN/view?usp=sharing
https://drive.google.com/file/d/1-hAtFJE7kW9CGeKyRA7h0Ea8tBbWx2gA/view?usp=sharing

I did two scans over a couple days for 2.4Ghz and 5Ghz, the issue is its not only on Wi-Fi but also when I am connect straigtht with ethernet?
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FurryNutz

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Re: DIR-885L Internet Speed is slower after setup
« Reply #11 on: December 24, 2017, 06:10:18 PM »

Is IPv6 set for Local Only on the DIR router?
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Cable:200mb/10Mb>Motorola MB7420>COVR3902>HP 24pt Gb Switch. 3xDGL-4500s,DIR-857,835,827,815,890L,880L,868L,865L,836L,810L,685,657,3x655s,645,628,601,DNR-202L,DNS-345,DCS-933L,936L and 960L.
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louij2

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Re: DIR-885L Internet Speed is slower after setup
« Reply #12 on: December 25, 2017, 03:32:03 AM »

Hi it was on auto, set it to local and still getting slow internet.
I even plugged in my old Apple Airport Extreme into one of the available gigabit ports and made a different network and I am getting much faster speeds on the Apple router, when the routers are sat right next to each other now.
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FurryNutz

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Re: DIR-885L Internet Speed is slower after setup
« Reply #13 on: December 25, 2017, 10:14:26 AM »

Lets try this, download same or prior version of FW to your PC.
Review this and send the FW .bin file to the router using the Recovery Mode:
Emergency Recovery Mode

Set up the router from scratch. Set IPv6 to Local only and try setting QoS to your ISP speeds UP and Down.
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Cable:200mb/10Mb>Motorola MB7420>COVR3902>HP 24pt Gb Switch. 3xDGL-4500s,DIR-857,835,827,815,890L,880L,868L,865L,836L,810L,685,657,3x655s,645,628,601,DNR-202L,DNS-345,DCS-933L,936L and 960L.
Go Here>Router Troubleshooting

louij2

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Re: DIR-885L Internet Speed is slower after setup
« Reply #14 on: December 26, 2017, 04:51:35 AM »

Okay so it is defo just the Wi-Fi that is having issues, ethernet is fine, I will have a go at what you told me to do now.
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