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[ghostdlr]

I have a PPPOE Cable connection . 
There are no issues when I connect the cable it directly to my computer.  But when I use the router , it randomly disconnects from the internet, at least 1 time each 10 minutes .

Also, I have a gigabit connection but the router limits it to 100 MB for some reason .  If I manually set the WAN Port Speed to 1000 Mbps , it doesn't connect to the internet anymore .
I have the latest firmware installed .

[FurryNutz]

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?

Internet Service Provider and Modem Configurations

• What ISP Service do you have? Cable or DSL?
• What ISP Modem Mfr. and model # do you have?
• Is ISP Modem/Service using Dynamic or Static WAN IP addressing?
• What ISP Modem service link speeds UP and Down do you have? Link> Speed Testing Sites
• Check cable between Modem and Router, 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.
  Example of a D-Link router configured for PPPoE with ISP Modem bridged: PPPoE Configuration on a Router

[ghostdlr]

Model: Dir 636LA1
Current Firmware Version:   1.05   Date:   2015/02/24
I'm in Europe, Romania

I have cable, no modem.
My connection was suppose to be gigabit but the router is limiting it to 100 mb most of the time . If I connect the cable directly to my PC, I usually get over 50 MB/s download speeds . (I have 1 GB internet connection)
The router doesn't allow me to set 1500 MTU .
The are no issues with the cable .
I have PPPOE and Always on is enabled .

[FurryNutz]

Are you having problems with wireless disconnects?

[ghostdlr]

I don't think the wireless gets disconnected . 

The router just drops the PPPOE connection :
Cable Status :     Disconnected
It reconnects after 20-40 seconds .

Also, it has a really slow boot time ... sometimes the power led doesn't light up for minutes  . I noticed this since I bought it but I didn't had any internet connection problems until a month ago .

[FurryNutz]

Possible cabling issue or compatibility issue between the WAN port on this router and your ISP service coming thru cable in the wall.
You would need to check with your ISP to see what they support as a connection rate coming from there router/switch in your building to your cable in the wall.

[ghostdlr]

I already called them 2 times . They couldn't find any issues .

If I connect the cable directly to my computer, it doesn't disconnect from the internet a single time .

[FurryNutz]

What is the connection rate you see on your PC when you connect to the ISP service with out the router being connected?

[ghostdlr]

When I connect the cable to my PC, I get 1000 MB connection .

But the biggest problems are the random disconnects . It happens at least 1-2 times in 10 minutes. 

The router sometimes has 1GB link and there are no disconnect issues (it doesn't happen too often).
Most of the times the internet link is 100 MB and it keeps disconnecting . The guys from the Internet provider told me they are seeing my connection as 100 MB and I don't get more than 11 MB/sec download .

[FurryNutz]

Maybe a connection issue between the router and there service.
Can you test the router at a different location, like a friend for families place or a neighbor to see if the problem follows?

[ghostdlr]

When I called the internet provider, a guy came over and he said the router was causing this .

I could test it somewhere else or try with another router , but I'm not sure when i can do it .   
Meanwhile, do you have any idea for a potential fix ?

[FurryNutz]

Only thing I would try is a new LAN cable between the router and wall out let.

Or manually reload the FW file again and set up from scratch with out loading a saved config from file.
Follow this: Link> >FW Update Process

IF after this is doesn't and if you try it at a different location and the problem follows, the router maybe faulty.

[ghostdlr]

I updated the firmware today . 

The problem started a month ago .   I used a firmware from 2012 until today .

[Hard Harry]

What are you connecting the router to? What is the ISP device?

[ghostdlr]

It's cable .... no device .