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Defining Access-Line-Identifier Interface Sets

 

To configure the router to create dynamic VLAN subscriber interfaces for DHCP and PPPoE subscribers based on an access-line identifier (ALI), you must create a dynamic ALI interface set.

To configure an ALI interface set in a dynamic profile:

  1. Access the dynamic profile that defines the ALI interface set.
  2. Configure the dynamic ALI interface set.

    Use the predefined variable $junos-interface-set-name to represent the name of the ALI interface set. It is replaced with the actual ALI interface set name generated by the router when the first subscriber from that household logs in.

  3. Include the underlying interfaces for the dynamic ALI interface set.

    Use the predefined variable $junos-interface-ifd-name to represent the name of the interface. The variable is replaced with the name of the interface on which the subscriber accesses the BNG.

    The unit statement is not required in the dynamic profile when you configure an ALI interface set.

  4. (Optional) For dynamic PPPoE subscriber interfaces, configure the maximum number of dynamic PPPoE sessions that the router can activate for the ALI interface set; that is, for the same household.
  5. (Optional) Apply attributes for CoS and interface filters to all subscriber interfaces belonging to the ALI interface set.

The following example shows the minimum dynamic profile required to define an ALI interface set named ali-vlan-set-profile. It uses predefined variables to represent the interface set and the underlying physical interface.