Technical Documentation

Associating VLAN IDs to VLAN Demux Interfaces

The following sections describe how to configure VLAN demux interfaces to receive and forward VLAN-tagged frames:

Associating VLAN IDs to VLAN Demux Interfaces Overview

To configure a VLAN demux interface to receive and forward VLAN-tagged frames, you must associate a VLAN ID or dual tagged (stacked) VLAN ID to the interface. Table 1 shows the configuration statements you use to associate VLAN IDs to VLAN demux interfaces, depending on the VLAN tag framing you use:

Table 1: Configuration Statements Used to Associate VLAN IDs to VLAN Demux Interfaces

 Single-Tag FramingDual-Tag Framing
Statement Format

vlan-id vlan-id;

vlan-tags outer tpid.<vlan-id> inner tpidvlan-id;

You can include all of the statements at the following hierarchy levels:

  • [edit interfaces interface-name unit logical-unit-number]
  • [edit logical-systems logical-system-name interfaces interface-name unit logical-unit-number]
  • [edit interfaces demux0 unit logical-unit-number]

Associating a VLAN ID to a VLAN Demux Interface

A VLAN demux interface that you have associated to a particular VLAN ID receives and forwards incoming frames that contain a matching VLAN ID. You can associate a VLAN ID to a single-tag logical interface or to a dual-tagged (stacked) logical interface.

  1. Associating a VLAN ID to a Single-Tag VLAN Demux Interface
  2. Associating a VLAN ID to a Dual-Tag VLAN Demux Interface

Associating a VLAN ID to a Single-Tag VLAN Demux Interface

To associate a VLAN ID to a single-tag VLAN demux interface, include the vlan-id statement at the [edit interfaces demux0 unit logical-unit-number] hierarchy level:

vlan-id vlan-id;

To configure an interface to support single-tag logical interfaces, you must also include the vlan-tagging statement at the [edit interfaces interface-name] hierarchy level. To support mixed tagging, include the flexible-vlan-tagging statement instead.

Associating a VLAN ID to a Dual-Tag VLAN Demux Interface

To associate a VLAN ID to a dual-tag VLAN demux interface, include the vlan-tags statement at the [edit interfaces demux0 unit logical-unit-number] hierarchy level:

vlan-tags inner <tpid.>vlan-id outer <tpid.>vlan-id;

To configure an interface to support dual-tag logical interfaces, include the stacked-vlan-tagging statement at the [edit interfaces interface-name] hierarchy level. To support mixed tagging, include the flexible-vlan-tagging statement instead.


Published: 2010-04-20