IP Routing Protocol-Independent Commands

distribute-list out

To suppress networks from being advertised in updates.  

For training, we want to redistribute only the Networks 10.0.5.2/32 and 10.0.9.3/32 (no restrictions from R2 to R1).

Video Demonstration

Explanation

from: IP Routing Protocol-Independent Commands

distribute-list out (IP)

To suppress networks from being advertised in updates, use the distribute-list out command in the appropriate configuration mode. To cancel this function, use the no form of this command.

distribute-list {access-list-number | access-list-name} out [interface-name | routing-process | as-number]

no distribute-list {access-list-number | access-list-name} out [interface-name | routing-process | as-number]

Syntax Description

access-list-number |access-list-name	Standard IP access list number or name. The list defines which networks are to be sent and which are to be suppressed in routing updates.
out	Applies the access list to outgoing routing updates.
interface-name	(Optional) Name of a particular interface. The interface-name argument cannot be used in address family configuration mode.
routing-process	(Optional) Name of a particular routing process, or the static or connected keyword.
as-number	(Optional) Autonomous system number.

Defaults

This command is disabled by default. Networks are advertised in updates.

Command Modes

Address family configuration (config-af)
Router address family topology configuration (config-router-af-topology)
Router configuration (config-router)

Command History

Release	Modification
10.0	This command was introduced.
11.2	The access-list-name argument was added.
12.0(7)T	Address family configuration mode was added.
12.2(33)SRA	This command was integrated into Cisco IOS Release 12.2(33)SRA.
12.2(33)SRB	This command was made available in router address family topology configuration mode.
12.2SX	This command is supported in the Cisco IOS Release 12.2SX train. Support in a specific 12.2SX release of this train depends on your feature set, platform, and platform hardware.

Usage Guidelines

When networks are redistributed, a routing process name can be specified as an optional trailing argument to the distribute-list command. Specifying this option causes the access list to be applied to only those routes derived from the specified routing process. After the process-specific access list is applied, any access list specified by a distribute-list command without a process name argument will be applied. Addresses not specified in thedistribute-list command will not be advertised in outgoing routing updates.

The interface-name argument cannot be used in address family configuration mode.

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Note To filter networks received in updates, use the distribute-list in command.

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Release 12.2(33)SRB

If you plan to configure the Multi-Topology Routing (MTR) feature, you need to enter the distribute-list out command in router address family topology configuration mode in order for this OSPF router configuration command to become topology-aware.