Juniper ACX2000 Configuration Guide

policy (Aggregate and Generated Routes)
Syntax policy policy-name;
Hierarchy Level [edit logical-systems logical-system-name routing-instances routing-instance-name
routing-options (aggregate | generate) (defaults | route)],
[edit logical-systems logical-system-name routing-instances routing-instance-name
routing-options rib routing-table-name (aggregate | generate) (defaults | route)],
[edit logical-systems logical-system-name routing-options (aggregate | generate) (defaults |
route)],
[edit logical-systems logical-system-name routing-options rib routing-table-name (aggregate |
generate) (defaults | route)],
[edit routing-instances routing-instance-name routing-options (aggregate | generate)
(defaults | route)],
[edit routing-instances routing-instance-name routing-options rib routing-table-name
(aggregate | generate) (defaults | route)],
[edit routing-options (aggregate | generate) (defaults | route)],
[edit routing-options rib routing-table-name (aggregate | generate) (defaults | route)]
Release Information Statement introduced before Junos OS Release 7.4.
Statement introduced in Junos OS Release 9.0 for EX Series switches.
Statement introduced in Junos OS Release 11.3 for the QFX Series.
Statement introduced in Junos OS Release 12.3 for ACX Series routers.
Statement introduced in Junos OS Release 14.1X53-D20 for the OCX Series.
Description Associate a routing policy when configuring an aggregate or generated route’s destination
prefix in the routes part of the aggregate or generate statement. This provides the
equivalent of an import routing policy filter for the destination prefix. That is, each potential
contributor to an aggregate route, along with any aggregate options, is passed through
the policy filter. The policy then can accept or reject the route as a contributor to the
aggregate route.
If the contributor is accepted, the policy can modify the default preferences. The
contributor with the numerically smallest prefix becomes the most preferred, or primary,
contributor. A rejected contributor still can contribute to a less specific aggregate route.
If you do not specify a policy filter, all candidate routes contribute to an aggregate route.
The following algorithm is used to compare two generated contributing routes in order
to determine which one is the primary or preferred contributor:
1. Compare the protocol’s preference of the contributing routes. The lower the preference,
the better the route. This is similar to the comparison that is done while determining
the best route for the routing table.
2. Compare the protocol’s preference2 of the contributing routes. The lower preference2
value is better. If only one route has preference2, then this route is preferred.
3. The preference values are the same. Proceed with a numerical comparison of the
prefixes’ values.
a. The primary contributor is the numerically smallest prefix value.
1667Copyright © 2017, Juniper Networks, Inc.
Chapter 41: Configuration Statements

Juniper ACX2000 Specifications

General

Brand	Juniper
Model	ACX2000
Category	Network Router
Language	English