Knowledge Base

Extending DHCP Start Address

Article ID: 151696

Article Last Modified on 11/1/2006

Microsoft Windows NT Server 3.5
Microsoft Windows NT Server 3.51
Microsoft Windows NT Server 4.0 Standard Edition

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

Keywords: kbbug kbenv kbnetwork KB151696