Verifying and Troubleshooting Route Redistribution
Verifying and Troubleshooting Route
ou can use various commands to verify and troubleshoot route redis-
tribution. The best commands to use on your router are trace, show ip
, and show ip protocol. Let's take a closer look at each of these
This command is useful for verifying and troubleshooting route
redistribution. Using the trace command, you can determine over which
path your traffic is flowing and decide if the optimal path is being used.
show ip route
This command displays what routes the router has
learned and by which routing protocol it learned them. You can verify
that all the networks are in the routing table.
show ip protocols
This command displays the IP routing protocols
configured on the router and shows what each routing process is redis-
tributing. Let's look at an example:
Routing Protocol is "ospf 1"
Sending updates every 0 seconds
Invalid after 0 seconds, hold down 0, flushed after 0
Outgoing update filter list for all interfaces is not
Incoming update filter list for all interfaces is not
Default redistribution metric is 128
Redistributing: ospf 1, eigrp 10
In addition to the above listed commands, protocol-specific debug com-
mands may be useful. For example, if you are viewing RIP updates (by using
the debug ip rip command), you may see a network advertised as unreach-
able. An unreachable network will not show up in the routing table. This sit-
uation can occur when you forget to set a protocol's default metric.
Copyright ©2001 SYBEX , Inc., Alameda, CA