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• underlying-interface  

• Related Topics
• Configuring Dynamic Subscriber Interfaces Using IP Demux Interfaces in Dynamic Profiles
• For information about static underlying interfaces, see the JUNOS Network Interfaces Configuration Guide

underlying-interface

Syntax

Hierarchy Level

Release Information

Statement introduced before JUNOS Release 7.4.

The [edit dynamic-profiles profile-name interfaces demux0] hierarchy added in JUNOS Release 9.3.
Support for aggregated Ethernet added in JUNOS Release 9.4.

Description

Configure the underlying interface on which the demultiplexing (demux) interface is running.

Options

underlying-interface-name—Either the specific name of the interface on which the DHCP discover packet arrives or the interface variable ($junos-underlying-interface). The variable is used to specify the underlying interface when a new demux interface is dynamically created. The variable is dynamically replaced with the underlying interface that DHCP supplies when the subscriber logs in.

Note: Logical demux interfaces are currently supported only on Gigabit Ethernet, Fast Ethernet, 10-Gigabit Ethernet, or aggregated Ethernet interfaces.

Required Privilege Level

interface—To view this statement in the configuration.

interface-control—To add this statement to the configuration.