Microsoft KB Archive/177357

= DHCP Client Does Not Immediately Renew Address =

Article ID: 177357

Article Last Modified on 11/1/2006

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APPLIES TO


 * Microsoft Windows NT Workstation 3.5
 * Microsoft Windows NT Workstation 3.51
 * Microsoft Windows NT Workstation 4.0 Developer Edition
 * Microsoft Windows NT Server 3.5
 * Microsoft Windows NT Server 3.51
 * Microsoft Windows NT Server 4.0 Standard Edition

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This article was previously published under Q177357





SYMPTOMS
Dynamic host configuration protocol (DHCP) clients may lose their IP address information for up to five minutes after their DHCP lease has expired.



RESOLUTION
To resolve this problem, obtain the latest service pack for Windows NT 4.0. For additional information, click the following article number to view the article in the Microsoft Knowledge Base:

152734 How to Obtain the Latest Windows NT 4.0 Service Pack



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



MORE INFORMATION
The following is a small section of RFC 1541 that governs lease expiration behavior:

4.4.4 Reacquisition and expiration ...   In both RENEWING and REBINDING state, if the client receives no   response to its DHCPREQUEST message, the client should wait one-half the remaining time until the expiration of T1 (in RENEWING state) and T2 (in REBINDING state) down to a minimum of 60 seconds, before retransmitting the DHCPREQUEST message.

If the lease expires before the client receives a DHCPACK, the client moves to INIT state, MUST immediately stop any other network processing and requests network initialization parameters as if the client were uninitialized. If the client then receives a DHCPACK allocating that client its previous network address, the client SHOULD continue network processing. If the client is given a new network address, it MUST NOT continue using the previous network address and SHOULD notify the local users of the problem.

Additional query words: request comments

Keywords: kbhotfixserver kbqfe kbnetwork kbpending kbprb KB177357

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