preferred-source-address
Syntax
preferred-source-address address;
Hierarchy Level
[edit dynamic-profiles interfaces interface-name unit logical-unit-number family family unnumbered-address interface-name], [edit dynamic-profiles profile-name interfaces demux0 unit logical-unit-number family family]
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.
To configure the preferred source address dynamically, instead of
using this statement, you must include the $junos-preferred-source-address predefined variable for IPv4 (family inet) addresses or the $junos-preferred-source-ipv6-address predefined variable for
IPv6 (family inet6) addresses.
Configuration of a preferred source address for unnumbered Ethernet interfaces is supported for IPv4 and IPv6 address families.
When you specify a static logical interface for the unnumbered
interface in a dynamic profile that includes the $junos-routing-instance predefined variable, you must not configure a preferred source address,
whether with the $junos-preferred-source-address predefined
variable, the $junos-preferred-source-ipv6-address predefined
variable, or the preferred-source-address statement. Configuring
the preferred source address in this circumstance causes a commit
failure.
Options
address—Secondary
IP address of the donor loopback interface. Alternatively, use the $junos-preferred-source-address or the $junos-preferred-source-ipv6-address predefined variable to dynamically apply a preferred source address
to the unnumbered Ethernet interface.
Required Privilege Level
interface—To view this statement in the configuration.
interface-control—To add this statement to the configuration.
Release Information
Statement introduced in Junos OS Release 9.2.
Support for the $junos-preferred-source-address and $junos-preferred-source-ipv6-address predefined variables introduced
in Junos OS Release 9.6.