Cisco ASR 9000 Series

PurposeCommand or Action
Enables poison reverse processing of RIP router updates.poison-reverse
Example:
RP/0/RSP0/CPU0:router(config-rip-if)#
poison-reverse
Step 10
commit
Step 11
Control Routing Information
This task describes how to control or prevent routing update exchange and propagation.
Some reasons to control or prevent routing updates are:
• To slow or stop the update traffic on a WAN link—If you do not control update traffic on an on-demand
WAN link, the link remains up constantly. By default, RIP routing updates occur every 30 seconds.
• To prevent routing loops—If you have redundant paths or are redistributing routes into another routing
domain, you may want to filter the propagation of one of the paths.
• To filter network received in updates — If you do not want other routers from learning a particular
device’s interpretation of one or more routes, you can suppress that information.
• To prevent other routers from processing routes dynamically— If you do not want to process routing
updates entering the interface, you can suppress that information.
• To preserve bandwidth—You can ensure maximum bandwidth availability for data traffic by reducing
unnecessary routing update traffic.
SUMMARY STEPS
1.
configure
2.
router rip
3.
neighbor ip-address
4.
interface type interface-path-id
5.
passive-interface
6.
exit
7.
interface type interface-path-id
8.
route-policy { in | out }
9.
commit
Cisco ASR 9000 Series Aggregation Services Router Routing Configuration Guide, Release 5.1.x
OL-30423-03 453
Implementing RIP
Control Routing Information