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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 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.