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Overview of TCP/IP Troubleshooting Tools

Table 3.1 lists the diagnostic utilities included with Microsoft TCP/IP; they are described in more detail in the following pages. All are useful to identify and resolve TCP/IP networking problems.

Table 3.1 TCP/IP Diagnostic Utilities


Used to


View the ARP (Address Resolution Protocol) cache on the interface of the local computer to detect invalid entries.


Display the host name of the computer.


Display current TCP/IP network configuration values, and update or release Dynamic Host Configuration Protocol (DHCP) allocated leases, and display, register, or flush Domain Name System (DNS) names.


Check the state of current NetBIOS over TCP/IP connections, update the NetBIOS name cache, and determine the registered names and scope ID.


Display statistics for current TCP/IP connections.


Check all aspects of the network connection.


Check records, domain host aliases, domain host services, and operating system information by querying Internet domain name servers. Nslookup is discussed in detail in "Windows 2000 DNS" in this book.


Trace a path to a remote system and report packet losses at each router along the way.


Send ICMP Echo Requests to verify that TCP/IP is configured correctly and that a remote TCP/IP system is available.


Display the IP routing table, and add or delete IP routes.


Trace a path to a remote system.

For a quick reference chart of these TCP/IP tools, as well as remote administration tools, see the appendix "TCP/IP Remote Utilities" in this book.

In addition to the TCP/IP-specific tools, the following Microsoft® Windows® 2000 tools can also make TCP/IP troubleshooting easier:

  • Microsoft SNMP service — provides statistical information to SNMP management systems.

  • Event Viewer — tracks errors and events.

  • Microsoft Network Monitor—performs in-depth network traces. The full version is part of the Microsoft® Systems Management Server product, and a limited version is included with Windows 2000 Server.

  • System Monitor — analyzes TCP/IP network performance.

  • Registry editors— both Regedit.exe and Regedt32.exe allow viewing and editing of registry parameters.

These tools are discussed in their own chapters of the Windows   2000 Resource Kit .

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