How to use the Network Diagnostics Tool (Netdiag.exe) in Windows 2000 (321708)

SUMMARY

This article describes how to use the Network Diagnostics Tool (Netdiag.exe) on a computer that is running Microsoft Windows 2000. Netdiag.exe is a command-line tool that you can use to test the network connectivity of the computer. Netdiag.exe performs a series of tests to determine the state and functionality of your network client computer. You can use the results of these tests, and the network status information that is provided by Netdiag.exe, to isolate network and connectivity problems on your Windows 2000-based workstation or server.

Netdiag.exe is included with the Microsoft Windows 2000 Support Tools. To install the Windows 2000 Support Tools, you must run Setup.exe from the Support\Tools folder on the Windows 2000 CD-ROM. To download Netdiag.exe, visit the following Microsoft Web site: Note Before you use Netdiag.exe to test the network connectivity of the computer, TCP/IP must be bound to one or more network adaptors.
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Overview of Netdiag.exe

Netdiag.exe uses the following syntax: You can use the following parameters with Netdiag.exe:

• /q: Use this parameter to specify quiet output and display errors only.
• /v: Use this parameter to run Netdiag.exe in verbose mode and to display information about the actions that are performed.
• /l: Use this parameter to write output to the Netdiag.log file. The Netdiag.log file is created in the same folder in which you run Netdiag.exe.
• /debug: Use this parameter to run Netdiag.exe in debug mode. This parameter specifies a more verbose output than when you use the /v parameter.
• /d:domain_name: Use this parameter to locate a domain controller in the specified domain.
• /fix: Use this parameter to correct issues with Domain Name System (DNS), domain controller tests and other issues, such as the following:
  • DNS Test
    If the computer is a domain controller, Netdiag.exe verifies all the DNS entries in the Netlogon.dns file to determine whether they are correct. Additionally, Netdiag.exe updates the appropriate entries if there is a problem.
  • Domain Controller Tests
    If the domain GUID that is cached in a local computer which is on your primary domain is different from the domain GUID that is saved in a domain controller, Netdiag.exe will try to update the domain GUID that is cached on the local computer.
• /dcaccountenum: Use this parameter to enumerate the computer accounts of the domain controller.
• /test:test_name: Use this parameter to specify the test or tests that you want to run, where test_name can be any one of the following values:

  Autonet: Automatic Private IP Addressing (APIPA) address test
  Bindings: Bindings test
  Browser: Redir and Browser test
  DcList: Domain controller list test
  DefGw: Default gateway test
  DNS: Domain Name Service (DNS) test
  DsGetDc: Domain controller discovery test
  IpConfig: IP address configuration test
  IpLoopBk: IP address loopback ping test
  IPSec: Internet Protocol security (IPSec) security test
  IPX: Internetwork Packet Exchange (IPX) test
  Kerberos: Kerberos Test
  Ldap: Lightweight Directory Access Protocol (LDAP) test
  Member: Domain membership test
  Modem: Modem diagnostics test
  NbtNm: NetBIOS over TCP/IP (NetBT) name test
  Ndis: Netcard queries test
  NetBTTransports: NetBT transports test
  Netstat: Netstat information test
  NetWare: NetWare test
  Route: Routing table test
  Trust: Trust relationship test
  WAN: Wide Area Network (WAN) configuration test
  WINS: Windows Internet Naming Services (WINS) service test
  Winsock: Winsock test

  
  To specify two or more tests, separate each /test:test_name item with a space. Note that the tests that you cannot skip will still be run.
  
  
• /skip:test_name: Use this parameter to specify the test or tests that you do not want to run, where test_name can be any one of the tests listed earlier in the /test:test_name list.
  
  To specify two or more tests, separate each /skip:test_name item with a space.

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Examples

• To run Netdiag.exe in verbose mode, type the following line at the command prompt and then press ENTER:

  netdiag /v

• To use Netdiag.exe to display information about the domain controller that is in your domain, type the following line and then press ENTER:

  netdiag /v /l /test:dsgetdc

  
  
  Write the information about the domain controller that is in your domain to the Netdiag.log file. The Netdiag.log file is located in the folder in which Netdiag.exe is run.
• To use Netdiag.exe to display the currently active IPSec policy, type the following line and then press ENTER:

  netdiag /test:ipsec /debug

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