Configuring Dynamic Subscriber Interfaces over VLANs

To configure a dynamic subscriber interface in an IP over VLAN over Ethernet configuration by using DHCP events, perform the following steps:

1. Configure the DHCP server.

   For instructions, see Configuring the DHCP Local Server .

2. Specify a Fast Ethernet, Gigabit Ethernet, or 10-Gigabit Ethernet port.

   host1(config)#interface gigabitEthernet 1/0

3. Specify VLAN as the encapsulation method on the interface. This command creates the VLAN major interface.

   host1(config-if)#encapsulation vlan

4. Create a VLAN subinterface by adding a subinterface number to the interface identification command.

   host1(config-if)#interface gigabitEthernet 1/0.1

5. Assign a unique VLAN ID to the VLAN subinterface.

   host1(config-if)#vlan id 101

6. Create the primary IP interface by assigning an IP address and mask to the VLAN subinterface (or make it unnumbered).

   host1(config-if)#ip address 192.168.2.10 255.255.255.0

7. Configure the primary IP interface to enable dynamic creation of subscriber interfaces.

   host1(config-if)#ip auto-configure ip-subscriber

8. (Optional) Specify the source address of traffic that is destined for the primary IP interface.

   host1(config-if)#ip source-prefix 192.168.2.10 255.255.255.0

Figure 23 shows the interface stack built for this configuration.

Figure 23: IP over VLAN over Ethernet Dynamic Subscriber Interface Configuration

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