RAS Clients Fail to Connect with IP Assigned via DHCP

• Microsoft Windows NT Server version 4.0
• Microsoft Routing and Remote Access Service Update for Windows NT Server 4.0

SYMPTOMS

Your Remote Access Service (RAS) clients may experience problems attempting to connect to your computer running Windows NT Server and running either RAS or Routing and Remote Access Service (RRAS). The RAS clients may receive one or more of the following error messages when they fail to connect:

• Dial-Up Networking could not negotiate a compatible set of network protocols you specified in the Server Type settings. Check your network configuration in the Control Panel then try the connection again.

  -or-

• TCP/IP CP reported error 733: the PPP control protocol for this network protocol is not available on the server.

CAUSE

This issue may be caused by the RAS or RRAS server failing to successfully obtain a complete set of IP address leases from the DHCP server.

RESOLUTION

WARNING: Using Registry Editor incorrectly can cause serious, system-wide problems that may require you to reinstall Windows NT to correct them. Microsoft cannot guarantee that any problems resulting from the use of Registry Editor can be solved. Use this tool at your own risk.

To resolve this issue, use one of the following methods:

• Change the configuration of the RAS or RRAS Server to use a static pool of IP addresses for its dial-up clients, using the following steps:

  1. Click Start, point to Settings, click Control Panel, and then

        double-click the Network icon.
  

  2. Click the Services tab, click Remote Access Service, and then click

        Properties.
  

        NOTE: For an RRAS server, click Routing and Remote Access Service
        instead of Remote Access Service.
  

  3. Click Network in the Remote Access Setup dialog box and click

        Configure for the TCP/IP Protocol in the Server Settings section
        in the Network Configuration dialog box.
  

  4. Click the Use Static Address Pool radio button and type a beginning

        and ending range of IP addresses to use for your RAS clients.
  

  5. Click OK twice, click Continue, click Close, and then restart your

        computer when prompted.
  

  -or-

• Obtain a new set of IP Addresses for your RAS pool by performing the following steps:

  1. Delete all active leases in DHCP manager for the RAS or RRAS

        Service by performing the following steps:
  

        a. Click Start, point to Programs, point to Administrative Tools,
           and then click DHCP Manager.
  
        b. Double-click the DHCP Scope.
  
        c. Select the active leases and click Delete.
  
     2. Delete the DHCPAddresses key from the registry by performing the
        following steps:
  
        a. Click Start, click Run, type "regedt32.exe" (without the
           quotes), and then click OK.
  
        b. Go to the following subkey:
  
           HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services
           \RemoteAccess\Parameters\IP\DHCPAddresses
  
        c. Click Delete on the Edit menu and click Yes in the Warning dialog
           box.
  
        d. Close Registry Editor and restart your computer.
  
     -or-
  
  

• Verify that your DHCP Server is operating correctly by trying to Renew the address of one of your Local Area Network (LAN) clients.

STATUS

Microsoft has confirmed this to be a problem in Windows NT version 4.0. We are researching this problem and will post new information here in the Microsoft Knowledge Base as it becomes available.

Keywords          : kbbug4.00 ntnetserv NTRAS ntrouter NTSrv kberrmsg kbnetwork
Version           : WinNT:4.0
Platform          : winnt
Issue type        : kbbug
Solution Type     : kbworkaround