Controlling Advertising and Processing in Routing Updates
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.)
Procedure
PurposeCommand or Action
Enters global configuration mode.configure terminal
Example:
Device# configure terminal
Step 1
Enters router configuration mode.router { rip | eigrp}
Example:
Device(config)# router eigrp 10
Step 2
Permits or denies routes from being
advertised in routing updates, depending
upon the action listed in the access list.
distribute-list {access-list-number |
access-list-name} out [interface-name | routing
process | autonomous-system-number]
Example:
Device(config-router)# distribute 120 out
gigabitethernet 1/0/7
Step 3
Suppresses processing in routes listed in
updates.
distribute-list {access-list-number |
access-list-name} in [type-number]
Example:
Device(config-router)# distribute-list 125
in
Step 4
Returns to privileged EXEC mode.end
Example:
Device(config-router)# end
Step 5
(Optional) Saves your entries in the
configuration file.
copy running-config startup-config
Example:
Device# copy running-config startup-config
Step 6
Routing Configuration Guide, Cisco IOS XE Everest 16.6.x (Catalyst 9500 Switches)
199
Configuring IP Unicast Routing
Filtering Routing Information
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