Troubleshooting TCP/IP

The following diagnostic utilities included with Microsoft TCP/IP can be used to find solutions to TCP/IP networking problems.

Table 19.1 TCP/IP Diagnostic Utilities

Utility	Usage
arp	View the ARP (address resolution protocol) table on the local computer to detect invalid entries.
hostname	Print the name of the current host.
ipconfig	Display current TCP/IP network configuration values, and update or release TCP/IP network configuration values.
nbtstat	Check the state of current NetBIOS over TCP/IP connections, update the LMHOSTS cache, and determine the registered name and scope ID.
netstat	Display protocol statistics and the state of current TCP/IP connections.
ping	Verify whether TCP/IP is configured correctly and that a remote TCP/IP system is available.
tracert	Check the route to a remote system.

For complete details about the utilities included with Windows NT, see Appendix A, "TCP/IP Utilities Reference." See also the online Command Reference.

These other Windows NT tools can be used for TCP/IP troubleshooting:

Microsoft SNMP service, to supply statistical information to SNMP management systems, as described in Chapter 11, "Installing Microsoft TCP/IP and SNMP."
Event Viewer, to track errors and events, as described in the Event Viewer chapter in the System Guide.
Performance Monitor, to analyze TCP/IP, FTP, and WINS server performance, as described in Chapter 17, "Using Performance Monitor with TCP/IP Services." (Microsoft SNMP must be installed if you want to monitor TCP/IP.)
Registry Editor, to browse and edit Registry parameters, as described in README.WRI in your \systemroot directory.