Microsoft KB Archive/298869

= BUG: DHCP: ACK Packets Rejected If There Is No Subnet Mask in the OFFER Packet =

Article ID: 298869

Article Last Modified on 2/11/2004

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APPLIES TO


 * Microsoft Windows CE 2.12 for the Handheld PC
 * Microsoft Windows CE 3.0 for the Handheld PC

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This article was previously published under Q298869



SYMPTOMS
Windows CE fails to get IP address from Dynamic Host Configuration Protocol (DHCP) servers that don't send a subnet mask in the OFFER packet, and Windows CE rejects the packet in the ACK phase.



CAUSE
This behavior was introduced in QFE #2 for Windows CE 2.12 when a check was added to make sure that the OFFER and ACK responses from the DHCP server had consistent information. However, some DHCP servers do not send the subnet mask in the OFFER phase, and Windows CE incorrectly drops the ACK packet.



RESOLUTION
If the server allows the option to send subnet masks in the OFFER packet, turn that option on. There is no resolution yet available for situations in which the server does not allow this option.



STATUS
Microsoft has confirmed that this is a problem in the Microsoft products that are listed at the beginning of this article.

Keywords: kbbug kbpending KB298869

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