Extending DHCP Start Address (151696)

The information in this article applies to:

Microsoft Windows NT Server 3.5
Microsoft Windows NT Server 3.51
Microsoft Windows NT Server 4.0

This article was previously published under Q151696

SYMPTOMS

If you extend the start address of the Dynamic Host Configuration Protocol (DHCP) scope, you may receive one of the following error messages:

Windows NT Server 3.5

The parameter is incorrect

Windows NT Server 3.51 or later

The range is extended less than the specified backward extension. Extend the range in integral of 32 IP addresses.

CAUSE

The above error messages are a result of the DHCP Scope being extended in increments not equal to 32.

RESOLUTION

Configure the start address in increments of 32 IP addresses.

MORE INFORMATION

Below is an example of an invalid extended start address of a DHCP scope:

   DHCP Scope Start Address:  150.32.100.200
   Extended DHCP Scope Start Address: 150.32.100.167

Below are examples of a valid extended start address of a DHCP scope:

   DHCP Scope Start Address:  150.32.100.200
   Extended DHCP Scope Start Address: 150.32.100.168
   Extended DHCP Scope Start Address: 150.32.100.136
   Extended DHCP Scope Start Address: 150.32.100.104

Modification Type:	Major	Last Reviewed:	5/14/2003
Keywords:	kbbug kbenv kbnetwork KB151696