84 - 238 CCNA 2: Routers and Routing Basics v3.1 Instructor Guide – Module 7 Copyright © 2004, Cisco Systems, Inc.
command. The RIP version can also be changed with the version [1 | 2] router
configuration command. Other variations of this command may be placed on the interface to
specify which version of packets to send and receive.
7.2.5 Verifying RIP configuration
The show ip protocol and the show ip route commands can be used to verify the
configuration of RIP. The show ip protocol command displays information about all of the
IP routing protocols that are used on the router. This command can be used to verify that RIP
is configured, interfaces are correctly sending and receiving RIP updates, and that the router is
advertising the correct networks. The basic timers, filters, and version can also be verified with
the show ip protocol command. The show ip route command can be used to verify
that RIP routes are received. These routes will be identified by an “R”, which indicates that
they were learned through RIP.
7.2.6 Troubleshooting RIP update issues
Some common RIP configuration errors include incorrect network statements, discontiguous
subnets, and split horizons. These RIP update issues can be identified with some basic show
and debug commands. The debug ip rip command enables rip debugging and will display
all of the rip updates as they are sent and received. The following is an example of the output
of the debug ip rip command:
LAB-A#debug ip rip
RIP protocol debugging is on
LAB-A#
RIP: ignored v1 update from bad source 223.8.151.1 on Ethernet0
RIP: sending v1 update to 255.255.255.255 via Ethernet0
(192.5.5.1)
network 204.204.7.0, metric 3
network 223.8.151.0, metric 3
network 201.100.11.0, metric 1
network 219.17.100.0, metric 2
network 199.6.13.0, metric 2
network 205.7.5.0, metric 1
network 210.93.105.0, metric 4
RIP: sending v1 update to 255.255.255.255 via Ethernet1
(205.7.5.1)
network 204.204.7.0, metric 3
network 223.8.151.0, metric 3
network 201.100.11.0, metric 1
network 219.17.100.0, metric 2
network 192.5.5.0, metric 1
network 199.6.13.0, metric 2
network 210.93.105.0, metric 4
RIP: sending v1 update to 255.255.255.255 via Serial0
(201.100.11.1)
network 192.5.5.0, metric 1
network 205.7.5.0, metric 1
RIP: ignored v1 update from bad source 219.17.100.1 on Ethernet0
RIP: received v1 update from 201.100.11.2 on Serial0
204.204.7.0 in 2 hops
223.8.151.0 in 2 hops