Microsoft KB Archive/87130

= Netlogon Broadcast over IP Subnets =

Article ID: 87130

Article Last Modified on 9/30/2003

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APPLIES TO


 * Microsoft LAN Manager 2.1 Standard Edition

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This article was previously published under Q87130



SYMPTOMS
A router does not pass a netlogon broadcast from a client on one subnet to a server on another separate subnet separated by the router.

Netlogon requests are not seen by servers even though you can ping the server's IP address from the client workstation.

Transport protocol: TCP/IP

Network topology: A subnetworked TCP/IP network in which the servers and the clients are separated by a router and are not bridged.



CAUSE
The primary domain controller is not on the same IP subnet as the clients requesting netlogon.



RESOLUTION
Do one of the following:

 Move the primary domain controller (PDC) into the same IP subnet as the clients requesting the netlogon by performing these steps:

 Change the IP address of the PDC so that it is on the same subnet. Refer to page 270 in &quot;Internetworking with TCP/IP Volume I&quot; for a description of subnetting. Physically move the PDC to the same segment as that of the clients requesting the netlogon.

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 Do the following:

 Put a backup domain controller on the client's IP subnet requesting the netlogon.</li> Connect it through a dedicated link to the primary domain controller in that domain.</li> Use NetBEUI as the protocol on the dedicated link.</li></ol>

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</li> Bridge the client's IP subnet and the server's IP subnet. This allows all broadcasts on the IP subnet to be passed to the other subnets. This method is not recommended.</li></ul>

Notes: Microsoft did not ship a TCP/IP transport stack with LAN Manager version 2.0. Some customer sites might use a different TCP/IP transport stack (for example, stacks from Wollogong or Hewlett-Packard). If these transport stacks are not NDIS compliant, they will not work; if they are NDIS compliant, they are not guaranteed to work.

Additional query words: 2.00 2.2 2.1 2.10 HP

Keywords: KB87130

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