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D-Link DSL Modem/Routers => Other DSL modem/routers => Topic started by: coolinx on November 28, 2012, 09:12:36 AM

Title: ppp oE authentication failure FIXED on DSL-2750u
Post by: coolinx on November 28, 2012, 09:12:36 AM

I was about to open a new topic for this problem but got it resolved now after hours and hours of trying.

I setup the DSL-2750U to replace my old modem from TDM adsl here in Mozambique.

Entered all details like username/password, etc. Also used the telnet console to change the mac address into the one from the old modem (the `macaddr`  command). TDM expects a certain mac address.

I kept getting authentication failures while I knew for sure that the username/password was 100% correct. Tried everything... Tried even bridge mode using a dd-wrt device for the ppp part. That worked fine.

I found out that the mac address that the 2750 is using for the ppp authentication towards the ISP is not the local lan address. It is the local lan address +2!

So I subtracted 2 from the mac address I need to send to the ISP and ran the macaddr command with that. Connection is up now.

Hope this helps others.

Title: Re: ppp oE authentication failure FIXED on DSL-2750u
Post by: FurryNutz on November 28, 2012, 09:23:39 AM

Thanks for sharing the good info.  ;)

Enjoy.

Title: Re: ppp oE authentication failure FIXED on DSL-2750u
Post by: specialstevie8 on February 28, 2014, 09:33:49 AM

Facing exactly the same problem ....

Couldn't understand the solution proposed by .. Coolinx here ..

Can anyone help me please ?

Title: Re: ppp oE authentication failure FIXED on DSL-2750u
Post by: FurryNutz on February 28, 2014, 09:54:25 AM

I recommend that you phone contact your regional D-Link support office and get immediate help and information on this.

Good Luck.

Quote from: specialstevie8 on February 28, 2014, 09:33:49 AM

Facing exactly the same problem ....

Couldn't understand the solution proposed by .. Coolinx here ..

Can anyone help me please ?

Title: Re: ppp oE authentication failure FIXED on DSL-2750u
Post by: coolinx on March 21, 2014, 07:22:03 AM

Hi there, Ill explain once more:

You need to change the mac-address on the dlink to the same mac-address as the old modem. You can do that by loging into the dlink command line interface with telnet and use the macaddr command.

The problem I had was that the mac-address that the DSL interface gets is a value of 2 more than what you entered with the macaddr command. To fix this you take the mac-address from the old modem, subtract 2 and enter that value in the macaddr command via the command line interface.

Hope it is a bit more clear now.

Title: Re: ppp oE authentication failure FIXED on DSL-2750u
Post by: FurryNutz on March 21, 2014, 07:35:17 AM

Any status on this?  ???

Quote from: specialstevie8 on February 28, 2014, 09:33:49 AM

Facing exactly the same problem ....

Couldn't understand the solution proposed by .. Coolinx here ..

Can anyone help me please ?