990 CHAPTER 59: RIP CONFIGURATION[RouterB] rip 100[RouterB-rip-100] filter-policy 2000 export rip 200# Display the routing table on Router A.[RouterA] display ip routing-tableRouting Tables: PublicDestinations : 7 Routes : 7Destination/Mask Proto Pre Cost NextHop Interface1.1.1.0/24 Direct 0 0 1.1.1.1 Eth1/01.1.1.1/32 Direct 0 0 127.0.0.1 InLoop02.1.1.0/24 Direct 0 0 2.1.1.1 Eth1/12.1.1.1/32 Direct 0 0 127.0.0.1 InLoop05.1.1.0/24 RIP 100 4 1.1.1.2 Eth1/0127.0.0.0/8 Direct 0 0 127.0.0.1 InLoop0127.0.0.1/32 Direct 0 0 127.0.0.1 InLoop0Troubleshooting RIPConfigurationNo RIP Updates Received Symptom:No RIP updates are received when the links work well.Analysis:After enabling RIP, you must use the network command to enable correspondinginterfaces. Make sure no interfaces are disabled from handling RIP messages.If the peer is configured to send multicast messages, the same should beconfigured on the local end.Solution:■ Use the display current-configuration command to check RIP configuration■ Use the display rip command to check whether some interface is disabledRoute OscillationOccurredSymptom:When all links work well, route oscillation occurs on the RIP network. Afterdisplaying the routing table, you may find some routes appear and disappear inthe routing table intermittently.Analysis:In the RIP network, make sure all the same timers within the whole network areidentical and relationships between timers are reasonable. For example, thetimeout timer value should be larger than the update timer value.Solution:■ Use the display rip command to check the configuration of RIP timers■ Use the timers command to adjust timers properly.
