Troubleshooting guide

BSR Troubleshooting Guide
6-100
Misconfigured Route Filtering
If route filtering is misconfigured, it prevents a RIP router from receiving routing
table updates or prevents a RIP router from transmitting routing table updates.
Follow these steps to discover and resolve misconfigured route filters:
1. Use the show running-config command to examine the suspect BSR.
2. See if any distribute-list in or distribute-list out command is configured in
Router Configuration mode on the BSR.
The distribute-list in command filters specific information in routing table
updates received by a router. The distribute-list out command prevents a router
from including specific information in routing table updates that it transmits. The
information that is filtered is specified with an access list.
3. To redefine the distribute-list as in or out for a specific access list, use the
distribute-list command in Router Configuration mode, as shown in the
following example:
RDN(config)#router rip
where protocol is the routing protocol used.
RDN(config-router)#distribute-list [extended | standard] | <list number> [in |
out]
where:
extended or standard is selected as the type of distribute list
list number is the access list number.
in has an impact only on the traffic attempting to come into the router through
the interface on which the access list is applied.
- or -
out has an impact only on the traffic attempting to leave the router through
the interface on which the access list is applied.