area-range

Syntax

area-range network/mask-length <restrict>;

Hierarchy Level

[edit protocols (ospf | ospf3) area area-id],
[edit protocols (ospf | ospf3) area area-id nssa],
[edit routing-instances routing-instance-name protocols (ospf | ospf3) area area-id],
[edit routing-instances routing-instance-name protocols (ospf | ospf3) area area-id nssa],
[edit logical-routers logical-router-name protocols (ospf | ospf3) area area-id],
[edit logical-routers logical-router-name protocols (ospf | ospf3) area area-id nssa],
[edit logical-routers logical-router-name routing-instances routing-instance-name
    protocols (ospf | ospf3) area area-id],
[edit logical-routers logical-router-name routing-instances routing-instance-name
    protocols (ospf | ospf3) area area-id nssa]

Description

(Area border routers only) For an area, summarize a range of IP addresses when sending summary link advertisements (within an area). To summarize multiple ranges, include multiple area-range statements.

For an NSSA, summarize a range of IP addresses when sending NSSA LSAs. The specified prefixes are used to aggregate external routes learned within the area when the routes are advertised to other area. To specify multiple prefixes, include multiple area-range statements. All external routes learned within the area that do not fall into one of the prefixes are advertised individually to other areas.

Default

By default, area border routers do not summarize routes being sent from one area to other areas, but rather send all routes explicitly.

Options

network—IP address. You can specify one or more IP addresses.

mask-length—Number of significant bits in the network mask.

restrict—(Optional) Do not advertise the configured summary. This has the effect of hiding all routes that are contained within the summary, effectively creating a route filter.

Usage Guidelines

See Configure Route Summarization and Configure a Not-So-Stubby Area.

Required Privilege Level

routing—To view this statement in the configuration.
routing-control—To add this statement to the configuration.