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[keenox]

Hello

I just bought a DIR-655 (rev. B1) router that came with 2.00 fw (European version I think). I have a Broadband (100mbps) PPPoE internet connection.

In the beginning I got 95-97 mbps on speedtest.net through the router - the same as with directly connecting my PC. It had all the default settings (SPI and QoS activated).

After I upgraded to 2.01 my speed seems limited to 10mbps (on the wired connection -tested on speedtest.net). I tried different firmwares 2.01NA, 2.03NA, 2.00NA. Yesterday I rolled back to 2.00NA and it seemed that the speed was back to normal. Today it was limited again to 10mbps. I deactivated SPI and QoS and it went back to ~100mbps. Then I flashed 2.03NA, deactivated SPI and QoS. At first I got ~100mbps, then the speed dropped again. I rolled back to 2.00NA, but that didn't solve anything. Now I'm on 2.03 NA with SPI and QoS disabled. I tried enabling and disabling it a few times, but no go. I even hard reset the router and the same. I tried everything suggested here.

Any suggestions?

P.S Does anyone have or know how to find the original 2.00 fw?

[FurryNutz]

What ISP Modem do you have? Stand Alone or built in router?
What ISP Modem make and model do you have?
If this modem has a built in router, it's best to bridge the modem. Having 2 routers on the same line can cause connection problems.

Ensure DNS IP addresses are being filled in under Setup/Internet/Manual?
Turn off ALL QoS options.
Turn off Advanced DNS Services if you have this option under Setup/Internet/Manual.
Turn on DNS Relay under Setup/Networking.
Setup DHCP reserved IP addresses for all devices on the router.
Ensure devices are set to auto obtain an IP address.
Set Firewall settings to Endpoint Independent for TCP and UDP.


Turn off all anti virus and firewall programs on PC while testing.
Turn off all devices accept for one wired PC while testing.

Also its not recommended to put NA firmware on a EU unit. There are differences between them. Specially for wireless.

[keenox]

@FurryNutz Hey there, thanks for the quick answer. I've already tried what you suggested (i said that in the original post).
I have no ISP modem. I have an PPPoE connection, so I connect directly the cable to the network card or the router in my case.
I switched back to EU firmware 2.01 but it's the same.

Here are my QoS settings:

[FurryNutz]

Need to remove the 3 grayed out check marks under QoS engine as well to be sure.
Ensure DNS IP addresses are being filled in under Setup/Internet/Manual?
Turn off ALL QoS options.
Turn off Advanced DNS Services if you have this option under Setup/Internet/Manual.
Turn on DNS Relay under Setup/Networking.
Setup DHCP reserved IP addresses for all devices on the router.
Ensure devices are set to auto obtain an IP address.
Set Firewall settings to Endpoint Independent for TCP and UDP.

[keenox]

I just did all that and still the same. It's weird. I'm under the impression that QoS isn't really disabled.

[FurryNutz]

It should be if ALL check marks are removed.

I would leave automatic uplink speed enabled if you can. What is the speed up and down that your paying for?

This PPPoE connection give you a private IP address on the WAN side or a public address?
Private would be anything starting with 10, 172 or 192, public starts with a 2 digit number for the WAN ip address.

check cable between Modem and Router, swap out to be sure. Cat6 or 5e recommended.

[keenox]

Nevermind, it's the cable. It's weird though. It's a 15m long Cat 5e shielded cable with shielded jacks. It works flawlessly (100mbps connection) if I connect the PC network adapter directly through it, but it seems routers have a problem with it. The D-link only connects at 10mbps through this cable and my Asus WL-500W doesn't connect at all through it.

Do you know what the problem could be?

[FurryNutz]

I would get a different cable then. CAT6 man, it's cheap and the best.

[keenox]

Yeah, I will do that. The problem is that it isn't such a common type of cable as cat5e. I temporarily solved the problem by moving the router to the other end of the cable and using a switch as a repeater between the router and the PC.

[FurryNutz]

Kewl, let us know if you get a new cable and if it works. Possible that one cable is not wired right or has a bad connection.

[Hard Harry]

Probably a Auto neg. issue. Try manually setting the duplex?

Advanced > Advanced Network > WAN Port Speed > Set to 100Mbps unless it can handle 1Gbps.

[keenox]

@FurryNutz The cable is in perfect state. Right now my PC is connected with the same cable directly and I get 100mbps LAN connection (95mbps on speedtest.net).

@Hard Harry No, it's not an Auto-negotiate issue. I've tried them all and I can only get a connection at 10mbps. When the router is near the PC, I can get 10mbps max on the WAN connection and when the router is at the other end I can get 10mbps max on the PC-router connection.

Here is the setup I want.



When I connect the PC directly (no router) -> 100mbps.
When I connect the router like in the image -> PC-router - 1Gbps and router-wan - 10mbps
When I connect the router near the socket -> PC-router - 10mbps and router-wan - 100mbps

It's weird that only routers have a problem with this cable. My Asus WL-500W didn't want to connect at all through this cable (I got PADO packets timeout).

[FurryNutz]

if other routers have had issues with this cable I would try a different one. 

[Hard Harry]

Wall socket? But what is before that? ONT? Some kind of school network?

[keenox]

Firstly, it's 25m cable, I took a better look today, but it shouldn't make a difference.

Before the wall socket there's a 10m FTP cable I think that goes into a hub or something like that. I don't know what the ISP uses, but I know it's fiber past that box. It might be an ONT (had to look that one up )