If traffic can get through, it is likely that an access list is blocking protocol traffic. Step 5 Make sure the access list does not filter traffic from ports that are used by the protocol in question. Configure explicit permit statements for traffic that you want the router to forward normally. Step 6 Enable the access list and verify that the protocol still functions correctly. If problems persist, continue isolating and analyzing access lists on all routers in the path from source to destination.
Observed symptoms range from poor performance to no communication at all.
Table 10-6 outlines the problems that might cause this symptom and describes solutions to those problems. The sequence numbers used in route-map router configuration commands determine the order in which conditions are tested. Misordered sequence numbers can cause redistribution problems. Step 1 Use the show running-config privileged EXEC command to display the router configuration. Look for route-map router configuration command entries.