tailieunhanh - CCNA 1 and 2 Companion Guide, Revised (Cisco Networking Academy Program) part 78

Cisco Networking Academy Program CCNA 1 and 2 Companion Guide, Revised part 78 is the Cisco approved textbook to use alongside version of the Cisco Networking Academy Program CCNA 1 and CCNA 2 web-based courses. The topics covered provide you with the necessary knowledge to begin your preparation for the CCNA certification exam (640-801, or 640-821 and 640-811) and to enter the field of network administration. | Page 739 Tuesday May 27 2003 2 16 PM RIP Features 739 The router sends update information out the two RIP interfaces. The output shows the router is using RIP-1 and broadcasts the update address . The number in parentheses represents the source address encapsulated into the IP header of the RIP update. You can look for several problems in the debug ip rip output. A couple of the problems that you can diagnose are discontiguous subnetworks or duplicate networks. A symptom of these problems is a routing protocol s advertising a network route with a metric that is less than the metric received for that network. Example 16-8 shows the output of the debug ip rip command. Example 16-8 debug ip rip Command Output BMH debug ip rip RIP event debugging is on BHM 7w2d RIP received v1 update from on serial0 0 7w2d 1 hop 7w2d in 2 hops 7w2d RIP sending v1 update to via Serial0 0 7w2d network metric 1 7w2d RIP sending v1 update to via FastEthernet0 0 7w2d metric 1 7w2d metric 2 Additionally you can use the following commands to troubleshoot RIP show ip rip database Used to display the contents of the private database when triggered extensions to RIP are enabled. show ip protocols summary Used to display IP routing protocol information. show ip route Used to show the IP routing table on the router. debug ip rip events Used to display the RIP information the router is processing across the prompt for an administrator to see. show ip interface brief Lists a summary of an interface s IP information and status in privileged EXEC mode. The brief parameter is an option that displays a brief summary of IP status and configuration. Page 740 Tuesday May 27 2003 2 16 PM 740 Chapter 16 Distance Vector Routing Protocols All of these commands provide information that can be helpful when troubleshooting a router. Lab Activity .