Microsoft KB Archive/892193

= A BOOTP/DHCP REPLY packet is not processed by a Windows-based DHCP client computer =

Article ID: 892193

Article Last Modified on 1/28/2005

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APPLIES TO


 * Microsoft Windows Server 2003, Standard Edition (32-bit x86)
 * Microsoft Windows Server 2003, Enterprise Edition (32-bit x86)
 * Microsoft Windows Server 2003, Datacenter Edition (32-bit x86)
 * Microsoft Windows XP Professional
 * Microsoft Windows XP Service Pack 1a
 * Microsoft Windows XP Professional
 * Microsoft Windows XP Professional
 * Microsoft Windows XP Home Edition
 * Microsoft Windows XP Service Pack 1a
 * Microsoft Windows XP Home Edition
 * Microsoft Windows XP Home Edition
 * Microsoft Windows 2000 Datacenter Server
 * Microsoft Windows 2000 Service Pack 3
 * Microsoft Windows 2000 Service Pack 2
 * Microsoft Windows 2000 Datacenter Server
 * Microsoft Windows 2000 Advanced Server
 * Microsoft Windows 2000 Advanced Server
 * Microsoft Windows 2000 Advanced Server
 * Microsoft Windows 2000 Advanced Server
 * Microsoft Windows 2000 Advanced Server
 * Microsoft Windows 2000 Service Pack 4
 * Microsoft Windows 2000 Service Pack 3
 * Microsoft Windows 2000 Service Pack 2
 * Microsoft Windows 2000 Service Pack 1
 * Microsoft Windows 2000 Server
 * Microsoft Windows 2000 Professional Edition
 * Microsoft Windows 2000 Service Pack 3
 * Microsoft Windows 2000 Service Pack 2
 * Microsoft Windows 2000 Service Pack 1
 * Microsoft Windows 2000 Professional Edition

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INTRODUCTION
After a Microsoft Windows-based Dynamic Host Configuration Protocol (DHCP) client computer broadcasts a DHCP DISCOVER packet through a network segment, the computer ignores a BOOTP/DHCP REPLY packet that is sent in response by a Bootstrap Protocol (BOOTP) server in the same network segment. The BOOTP/DHCP REPLY packet is not processed.



MORE INFORMATION
After the DHCP client sends the DHCP DISCOVER packet, it waits for a DHCP OFFER packet in response. Other types of packets may not be processed.

According to Request for Comments (RFC) document 1534, a DHCP client computer must assume that an IP address that is returned in a message from a BOOTP server has an infinite lease. Also, a DHCP client computer must prefer a reply from a DHCP server to a reply from a BOOTP server. Therefore, even though the BOOTP/DHCP REPLY packet contains TCP/IP configuration information, this packet is considered unexpected and is not processed by the DHCP client computer.

For more information about how DHCP client computers and BOOTP servers operate together, visit the following non-Microsoft Web site:

ftp://ftp.rfc-editor.org/in-notes/rfc1534.txt

For more information about DHCP, visit the following non-Microsoft Web site:

ftp://ftp.rfc-editor.org/in-notes/rfc1531.txt

For more information about BOOTP, visit the following non-Microsoft Web site:

ftp://ftp.rfc-editor.org/in-notes/rfc951.txt

Keywords: kbhowto KB892193

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