3 Replies Latest reply on Nov 13, 2012 5:58 PM by mmarkwood

    ADSL / PPPOE Configuration Help

    mmarkwood New Member

      Hello,

       

      I am replacing an old Cisco router at a customer site and since I've never configured ADSL on an AdTran product I need a little assistance. I'll be using a NetVanta 3458 with an ADSL NIM

       

      Related part of existing Cisco Config:

       

      interface ATM1/0

      no ip address

      no atm ilmi-keepalive

      bundle-enable

      dsl operating-mode auto

      pvc 0/35

        pppoe-client dial-pool-number 1

      !

      !

      interface Dialer1

      description ---------------------------------- ppoe dialer for ADSL connection

      ip address negotiated

      ip mtu 1490

      encapsulation ppp

      ip tcp adjust-mss 1452

      dialer pool 1

      dialer remote-name redback

      dialer-group 1

      no cdp enable

      ppp authentication pap chap callin

      ppp chap hostname dsluser

      ppp chap password 7 encrypteddslpass

      ppp pap sent-username dsluser password 7 encrypteddslpass

       

      What I think I need to do in the NetVanta:

       

      interface adsl 2/1

        no shutdown

      !

      !      

      interface atm 1 point-to-point

        no shutdown

        cross-connect 2 adsl 2/1 atm 1

      !

      interface atm 1.1 point-to-point

        no shutdown

        pvc 0/35

        no ip address

      !

      interface ppp 1

        ip address negotiated

        ip access-policy all-selfprotect

        ppp authentication chap

        no fair-queue

        ppp chap hostname dsluser

        ppp chap password encrypted encrypteddslpass

        no shutdown

        cross-connect 3 atm 1.1 ppp 1 pppoe-client

       

       

      Any help is greatly appreciated.

        • Re: ADSL / PPPOE Configuration Help
          Employee

          @mmarkwood - Your sample NetVanta configuration looks correct. The ADSL interface will cross-connect with the ATM interface and the ATM sub-interface will cross-connect with the PPP interface, as you have already configured.

           

          The following guides provide more details on how to set up ADSL and PPPoE connections:

          Configuring ADSL Internet Access in AOS

          Configuring PPP and PPPoE over ATM in AOS Quick Start Guide

           

          If you are experiencing issues bringing the connection up, it would be helpful to see the following:

           

          1. Output to "show interface".

          2. Output to "debug ppp verbose" as the PPP connection negotiates.

          **Note: I would recommend logging the output of this debug

           

          Please do not hesitate to let us know if you have any questions.

           

          Thanks,

          Noor

          3. A copy of the configuration. Please remember to remove any information that may be sensitive to your network.

            • Re: ADSL / PPPOE Configuration Help
              Employee

              mmarkwood - I believe you opened a support ticket with Adtran Technical Support where it was determined that the PPPoE connection was unable to come up due to the mismatch PPP negotiation settings between the NetVanta and the Cisco router it was negotiating with.

               

              The Cisco router was set to negotiate the PPP connection using CHAP. This means that the NetVanta would need to send a username and password through CHAP to the Cisco to authenticate the VPN connection. The NetVanta configuration settings based on your configuration above would need to look something like this:

               

              interface ppp 1

                ip address negotiated

                ip access-policy all-selfprotect

                no fair-queue

                ppp chap hostname dsluser

                ppp chap password encrypted encrypteddslpass

                no shutdown

                cross-connect 3 atm 1.1 ppp 1 pppoe-client

               

              Note that the ppp authentication chap command was removed from the configuration you provided. This command will actually require the Cisco to authenticate to the NetVanta, which will cause issues if the Cisco is not sending a CHAP username and password.

               

              Are you having any additional issues with your setup? Please let us know if you have any further questions.

               

              Thanks,

              Noor