Cisco Systems 3560 Manual Do Utilizador

Use a network monitoring privileged EXEC command such as show ip ospf interface to verify the 
interfaces that you enabled as passive, or use the show ip interface privileged EXEC command to verify 
the interfaces that you enabled as active.

To re-enable the sending of routing updates, use the no passive-interface interface-id router 
configuration command. The default keyword sets all interfaces as passive by default. You can then 
configure individual interfaces where you want adjacencies by using the no passive-interface router 
configuration command. The default keyword is useful in Internet service provider and large enterprise 
networks where many of the distribution routers have more than 200 interfaces.

You can use the distribute-list router configuration command with access control lists to suppress routes 
from being advertised in routing updates and to prevent other routers from learning one or more routes. 
When used in OSPF, this feature applies to only external routes, and you cannot specify an interface 
name.

You can also use a distribute-list router configuration command to avoid processing certain routes listed 
in incoming updates. (This feature does not apply to OSPF.)

Beginning in privileged EXEC mode, follow these steps to control the advertising or processing of 
routing updates:

Use the no distribute-list in router configuration command to change or cancel a filter. To cancel 
suppression of network advertisements in updates, use the no distribute-list out router configuration 
command.

passive-interface interface-id

Suppress sending routing updates through the specified Layer 3 
interface.

(Optional) Set all interfaces as passive by default.

no passive-interface interface type

(Optional) Activate only those interfaces that need to have 
adjacencies sent.

network network-address

(Optional) Specify the list of networks for the routing process. The 
network-address is an IP address.

end 

Return to privileged EXEC mode.

(Optional) Save your entries in the configuration file.

Enter global configuration mode.

router {bgp | rip | eigrp}

Enter router configuration mode.

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

Permit or deny routes from being advertised in routing 
updates, depending upon the action listed in the access list.

distribute-list {access-list-number | 
access-list-name} in [type-number]

Suppress processing in routes listed in updates.

end 

Return to privileged EXEC mode.

(Optional) Save your entries in the configuration file.