Troubleshooting TCP/IP Configuration and Connectivity
When you initially set up TCP/IP, you should check the computer's TCP/IP configuration and to test its connectivity as follows:
- Open a command prompt window and run ipconfig to display the computer's current IP configuration. You can use ipconfig /all to display more detailed information.
- Use the ping command to ping the computer's loopback address: ping 127.0.0.1. This tests whether TCP/IP is correctly installed and bound to the network adapter card.
- Ping the IP address of the local computer to verify the uniqueness of the IP address on the network.
- Ping the IP address of the default gateway for the local subnet to check that the default gateway is up and running. This step also demonstrates whether the computer can successfully communicate over the local network segment.
- Ping the IP address of a computer located on a different network segment. This indicates whether the computer can send and receive network data packets through a router.
You can get further information about TCP/IP from the online version of the Windows XP Resource Kit.