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Forum Replies

  1. For non-static clients' IPs we can use local pools or dhcp:

    ! ------ R2 Client
    interface Dialer0
     ip address dhcp
    ! or
    !ip address negotiated
    ! ------ R1 Server
    ip dhcp excluded-address
    ip dhcp pool PPPoE 
    ! or
    ! ip local pool PPPoE
    interface Virtual-Template1
     peer ip address forced 
     peer default ip address dhcp-pool PPPoE
    ! or
    !peer ip address forced
    !peer default ip address pool PPPoE

    The local pools differ from the DHCP in assigning /32 to the clients.
    The OSPF RFC says that OSPF ignores subnet mask on point-to-point links, however we won’t be able to have adjacency between /24 and /32, since the client finds itself in an isolated network.

  2. Hi Mike,

    Sure this is no problem, you can put ip helper on the virtual-template interface of the PPPoE server.


  3. Hello Ryan

    When creating Broadband Access Group profiles, you can create either a global group or multiple non-global groups. A global group is that which is created using the bba-group ppoe global command just like Rene did in the example. The non-global groups can be created using the command bba-group ppoe group-name where the group name can be whatever you name it. Whether one profile or the other will be used depends on the PPPoE sessions that are established and what Virtual Circuit (VC) classes are used. Those can be further defined in the configuration. You can find more information about these profiles and how to configure them here.

    As for the virtual templates, these can be considered the configuration that is inherited by the interface to which the client will connect. This is associated with the bba profile which will be used to connect. Finally, this is all tied together by applying the bba group to the physical interface to which the client will connect.

    I hope this has been helpful!


  4. This is helpful. One question more: can you/would you have a pppoe server-client configuration where both sides take the ip address of the underlying, directly-connected interface using ip unnumbered? EG: two routers connected on G1--G1, and both sides are ip unnumbered to their G1 interface?

    Thank you

  5. Hi,
    I think there is not enough coverage in CCNP ROUTE topics on on PPPoE vpdn and more for the exam topic. Can this be improved as per the exam guide lines

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