Troubleshooting LAN Manager for MS-DOS 2.2c and DHCP

• Microsoft LAN Manager for MS-DOS, version 2.2c

SUMMARY

This article provides basic troubleshooting tips for configuring the Dynamic Host Configuration Protocol (DHCP) with Microsoft LAN Manager for MS-DOS.

MORE INFORMATION

Troubleshooting Tips and Techniques

1. Clean boot your computer by removing terminate-and-stay-resident (TSR) programs, and third party utilities from your CONFIG.SYS and AUTOEXEC.BAT configuration files. Remove or minimize the use of memory managers. Add back functionality until you discover the utility or combination of utilities that is creating undesirable effects.

2. Verify that the client PROTCOL.INI and LANMAN.INI files reflect your configuration. For more information:

       - See the Microsoft LAN Manager Installation and Configuration Guide,
         Chapter 10.
   

       - See the Microsoft LAN Manager Administrator's Reference Guide,
         Appendix B.
   

       - Type NET HELP at the MS-DOS command prompt.
   

       - Check the on-line help available in SETUP.EXE. Use the F1 key to get
         clarification on a specific option.
   

       - Query in the Microsoft Knowledge Base for the name of your specific
         network interface card (NIC).
   

3. Force Microsoft LAN Manager for MS-DOS to recreate the hidden DHCP configuration file (DHCP.PRM):

   a. Use the ATTRIB command to remove the hidden and read-only file

         attributes.
   

   b. Delete the file.

   c. Quit and restart Microsoft LAN Manager for MS-DOS to allow the file

         to be recreated.
   

   The client automatically creates the DHCP.PRM (a hidden binary file) in the installation directory.

4. Verify the IP is functioning correctly by using PING, NET VIEW, NET CONFIG, and NET DIAG on the client.

       For more information see:
   

       - The on-line help available for each command by typing "/?" (without
         the quotation marks). For example:
   

            NET VIEW /?
   
         For PING help, type the command without any parameters.
   
       - The README.TXT file in the Microsoft LAN Manager for MS-DOS
         directory. Check the table of contents for sections that pertain to
         your specific installation.
   
   

Troubleshooting Utilities

You can run IPCONFIG on the client computer to check the client's IP configuration. For more information see:

• Section 21: IPCONFIG.EXE and Controlling DHCP Leases, of the README.TXT file in the Microsoft LAN Manager for MS-DOS directory.
• The following Knowledge Base Articles:

      -  Q94069: Microsoft TCP/IP Protocol Comparison and FAQ
      -  Q96681: Troubleshooting TCP/IP Utilities for LAN Manager
      - Q122363: LAN Manager Version 2.2c Client DHCP Setup Changes May Fail
      - Q123285: IPCONFIG Displays Invalid Results
      - Q123671: Not Able to Use DNS IP Address Assigned by DHCP
      - Q130538: DHCP-Enabled MS-DOS Clients Do Not Resolve Host Names
  

• The Microsoft Windows NT Server TCP/IP manual, Chapter 4, Installing and Configuring DHCP Servers.
• Knowledge Base article Q169289 titled "DHCP (Dynamic Host Configuration Protocol) Basics."

Troubleshooting Resources

• Check the Microsoft Windows NT Server Comprehensive Index for information on Clients.
• Review the README.TXT file in the Microsoft LAN Manager for MS-DOS installation directory.
• If Windows is installed, review the LM22_W3x.HLP help files (where x is 1 or 2). This file is located in the LAN Manager Client installation directory in the \NETPROG subdirectory.
• Additional information may be available in the Microsoft Knowledge Base. Query on the following words:

         DHCP and CLIENT and PRODTCP32 and 2.2C