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Example: Configuring IPv6 Dynamic VLAN Demux Interfaces over an Aggregated Ethernet Underlying Interface with DHCP Local Server

This example shows how to configure the dynamic creation of IPv6 VLAN demux interfaces with aggregated Ethernet as the underlying interface. DHCP Local Server configuration enables the association of subscribers to the VLAN demux interface by listing the aggregated Ethernet interface in the DHCP local server configuration.


VLAN demux subscriber interfaces over aggregated Ethernet physical interfaces are supported only for MX Series routers that have only MPCs installed. If the router has other cards in addition to MPCs, the CLI accepts the configuration but errors are reported when the subscriber interfaces are brought up.

To configure dynamic subscribers on dynamic VLAN demux interfaces:

  1. Enable VLAN tagging and VLAN auto-configuration on the underlying aggregated Ethernet interface that you plan to use for dynamically created VLAN demux interfaces.

  2. Define the gigabit Ethernet interfaces that are part of the aggregated Ethernet interface.

  3. Define the loopback interface.

  4. Configure a dynamic profile for subscriber access.

  5. Configure a dynamic profile for VLAN demux interface creation.

  6. Configure the access method used to dynamically create the subscriber interfaces. The following stanza specifies the aggregated Ethernet interface (ae1.0) for use with the dynamically created subscriber interfaces.

    Instead of using the aggregated Ethernet interface, you can alternatively specify demux0 as the device to use with the subscriber interfaces as follows:


    Because the demux interfaces and unit values are created dynamically, the unit number is not specified for the demux0 interface.