Related Topics
“Configuring a Preferred Source Address for Unnumbered Ethernet Interfaces,” in JUNOS Network Interfaces Configuration Guide.
address
JUNOS System Basics Configuration Guide

preferred-source-address

Syntax



preferred-source-address address;

Hierarchy Level



[edit dynamic-profiles interfaces interface-name unit logical-unit-number family inet unnumbered-address interface-name],
[edit dynamic-profiles profile-name interfaces demux0 unit logical-unit-number family family],
[edit interfaces interface-name unit logical-unit-number family inet unnumbered-address interface-name],
[edit logical-systems logical-system-name interfaces interface-name unit logical-unit-number family inet unnumbered-address interface-name]

Release Information

Statement introduced in JUNOS Release 9.0.

The [edit dynamic-profiles profile-name interfaces interface-name unit logical-unit-number family inet unnumbered-address interface-name] hierarchy added in JUNOS Release 9.2.

Description

For unnumbered Ethernet interfaces configured with a loopback interface as the donor interface, specify one of the loopback interface’s secondary addresses as the preferred source address for the unnumbered Ethernet interface. Configuring the preferred source address enables you to use an IP address other than the primary IP address on some of the unnumbered Ethernet interfaces in your network.

Currently, configuration of a preferred source address for unnumbered Ethernet interfaces is supported only for the IPv4 address family.

Options

address—Secondary IP address of the donor loopback interface.

Required Privilege Level

interface—To view this statement in the configuration.

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