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Example: Configuring Dynamic Subscriber Interfaces on IP Demux Interfaces

This example shows how to configure dynamic subscriber interfaces on IP demux interfaces. DHCP dynamically creates the demux interface when a subscriber logs in.

To configure subscribers on dynamic IP demux interfaces:

  1. Configure the static VLAN as the underlying interface.
    interfaces {ge-0/3/0 {vlan-tagging;unit 0 {vlan-id 0;demux-source inet;family inet {unnumbered-address lo0.0;}}}lo0 {unit 0 {family inet {address 90.1.1.1/24;}}}}
  2. Configure the creation of demux interfaces in the dynamic profile.
    dynamic-profiles {subscriber-profile {interfaces {demux0 {"$junos-interface-ifd-name" {unit "$junos-interface-unit" {demux-options {underlying-interface "$junos-underlying-interface";}family inet {demux-source {$junos-subscriber-ip-address;}filter {input ingressFilter;output egressFilter;}mac-validate loose;}}}}}}}
  3. Configure the access method to dynamically create the demux interface.

    DHCP relay is the access method used in this example.

    forwarding-options {dhcp-relay {traceoptions {flag all;}server-group {router {100.20.42.1;}dynamic-profile subscriber-profile;active-server-group erx;group one {interface ge-0/0/2.0 upto ge-0/0/2.4000;interface-client-limit 200}}}
  4. Configure the interface for DHCP.
    interfaces {traceoptions {flag all;}ge-0/0/2 {unit 0 {demux-source inet;family inet {unnumbered-address lo0.0;}}}lo0 {unit 0 {family inet {address 100.20.32.2/32;}}}}

Published: 2010-04-15

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