Configuring Dynamic PPPoE over Static PPPoE with Ethernet and VLAN Interface Columns

Figure 1 shows dynamic PPPoE subinterface columns and illustrates an alternative method for PPPoE to support multiple IP sessions over each VLAN.

Figure 1: Dynamic PPPoE over Static PPPoE with VLAN Interface Columns

To configure a VLAN subinterface to support a dynamic PPPoE subinterface:

1. Specify a Fast Ethernet, Gigabit Ethernet, or 10-Gigabit Ethernet interface.
   host1(config)#interface fastEthernet 4/1
2. Specify VLAN as the encapsulation method.
   host1(config-if)#encapsulation vlan

   This command adds the VLAN major interface.

3. Create a VLAN subinterface by adding a subinterface number to the interface identifier.
   host1(config-if)#interface fastEthernet 4/1.1
4. Assign a VLAN ID for the subinterface.
   host1(config-if)#vlan id 400
5. Set the encapsulation type to PPPoE.
   host1(config-subif)#encapsulation pppoe
6. Assign a profile.
   host1(config-subif)#pppoe profile pppoeProfile2

   The default encapsulation type, any, applies to any autoconfigured encapsulation that does not have a specific profile assignment.

7. Configure the interface to detect and accept dynamic PPPoE subinterfaces.
   host1(config-subif)#pppoe auto-configure