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Configuring Dynamic VLANs Based on Agent Circuit Identifier Information

On MX Series routers with Modular Port Concentrators/Modular Interface Cards (MPCs/MICs) that face the access side of the network, you can configure dynamic VLAN subscriber interfaces based on agent circuit identifier (ACI) information, also known as ACI-based dynamic VLANs, for DHCP and PPPoE subscribers. To do so, you create an ACI interface set, which is a logical collection of subscriber interfaces that originate at the same household or on the same access-loop port, and then reference the ACI interface set in the dynamic profile for a PPPoE or IP demultiplexing (IP demux) logical subscriber interface.

Grouping subscriber interfaces into ACI interface sets to create ACI-based dynamic VLANs facilitates application of subscriber-based services, such as class of service (CoS) and interface-shared filters, to all of the subscriber interfaces from the same household.

Before you begin:

  1. Configure the underlying physical interface for single-tag VLANs or stacked (dual-tag) VLANs.

    See the following topics:

  2. Create a dynamic profile that defines the logical subscriber interface.

    See the following topics:

To configure a dynamic VLAN subscriber interface based on ACI information:

  1. Create a dynamic profile that defines the dynamic ACI interface set.

    See Defining Agent Circuit Identifier Interface Sets.

  2. (Optional) Include attributes for PPPoE, CoS, and interface-shared filters in the dynamic profile for the ACI interface set.

    See Defining Agent Circuit Identifier Interface Sets.

  3. (Optional) In the dynamic profile for the ACI interface set, configure the router to use the Actual-Data-Rate-Downstream VSA [26-130] or Access-Loop-Encapsulation VSA [26-144] value in PPPoE control packets to adjust CoS shaping-rate and overhead-accounting attributes at a per-household level.

    See Adjusting the CoS Shaping Rate and Overhead Accounting Parameters for Agent Circuit Identifier-Based Dynamic VLANs.

  4. Dynamically or statically configure the underlying VLAN logical interface to enable dynamic subscriber interface creation based on ACI information.

  5. Associate the dynamic ACI interface set with the dynamic PPPoE or dynamic IP demux logical subscriber interface.

    See Configuring Dynamic VLAN Subscriber Interfaces Based on Agent Circuit Identifier Information.

  6. (Optional) In the dynamic profile for the PPPoE (pp0) subscriber interface, configure the router to use the Actual-Data-Rate-Downstream VSA [26-130] or Access-Loop-Encapsulation VSA [26-144] value in PPPoE control packets to adjust CoS shaping-rate and overhead-accounting attributes at a per-subscriber level.

    See Adjusting the CoS Shaping Rate and Overhead Accounting Parameters for Agent Circuit Identifier-Based Dynamic VLANs.

  7. (Optional) Verify the ACI-based dynamic VLAN subscriber interface configuration.

    See Verifying and Managing Agent Circuit Identifier-Based Dynamic VLAN Configuration.

  8. (Optional) Clear the ACI interface set from the router when the interface set no longer has any active subscriber sessions.

    See Clearing Agent Circuit Identifier Interface Sets.

 

Related Documentation

 

Published: 2013-07-31

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