DHCP Clients Receive Identical IP and Default Gateway Addresses (249003)


The information in this article applies to:

  • Microsoft Windows NT Server 4.0
  • Microsoft Windows 98
  • Microsoft Windows NT Workstation 4.0
This article was previously published under Q249003

SYMPTOMS

When you release or renew a DHCP client or when you lease an IP address during startup on a switched network, you may receive an IP address and default gateway address that are identical.

For example, if your computer is supposed to use the following IP addresses

IP address: 192.168.0.15
Default Gateway: 192.168.0.1


you may actually receive identical addresses:

IP address: 192.168.0.15
Default Gateway: 192.168.0.15

CAUSE

This issue can occur if the setting on the Auto Gateway Control or Auto Broadcast Control switch is turned on.

RESOLUTION

To resolve this issue, contact the manufacturer of your Ethernet switch.

MORE INFORMATION

If the settings on the Auto Gateway Control or Auto Broadcast Control switch are turned on, then the DHCPOFFER packet is stripped down, which changes the default gateway to the same address as the IP address.
Modification Type:MinorLast Reviewed:12/20/2004
Keywords:kbnetwork kbprb KB249003
©2004 Microsoft Corporation. All rights reserved.