IP Troubleshooting Small Group Exercise

Activity Overview:
This is a small group activity consisting of an IP troubleshooting exercise consisting of five scenario based questions. The exercise begins with a review of a recommend IP troubleshooting procedure and continues with five scenario based questions.

Simplified IP Troubleshooting Procedures:
Host:
* Verify layer-1 and layer-2 * Physical connectivity to the host to connected. Ethernet connection should indicate electrical connectivity with some type of LED indicator light. * Verify OS detecting network interface correctly by verifying drivers installed correctly and OS display the interface as “connected” * If you have access to switching infrastructure ensure that host is assigned to the proper VLAN with the correct interface switching type (access or trunk) * Verify layer-3 * Verify IP address assignment configuration with “ipconfig /all” command on MS Windows OSs * IP address and mask correctly assigned? * Default gateway; is the host on the same IP subnet as the default gateway? * Attempt to ping default gateway, * If successful host has layer-3 connectivity to directly connection network * If unsuccessful attempt to ping other host on directly connected IP subnet * If host is having issues with pinging hosts on directly connected network, verify ARP resolution by using the command ”arp –a” command. This command displays all the dynamic ARP resolutions. If no ARP entries present the host may have hidden layer-2 issues. * Verify IP connectivity to remote networks * Review IP default gateway and static routes * “ipconfig /all” for Windows hosts for default gateway * “netstat –rn” for Window host routing table * Unit 7 will expand the troubleshooting