Microsoft KB Archive/170062

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Advantages of DHCP Reservation over Static IP Assignment

Article ID: 170062

Article Last Modified on 2/23/2007


  • Microsoft Windows 2000 Server
  • Microsoft Windows 2000 Advanced Server
  • Microsoft Windows 2000 Professional Edition
  • 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

This article was previously published under Q170062


There are many advantages to using dynamic host configuration protocol (DHCP) reservations for Windows NT clients (Server or Workstation) over statically assigning the client with an IP address. The following describes two advantages:

  • If your client is configured for Windows Internet Name Service (WINS) and your WINS database becomes corrupt at any time, a simple "ipconfig /release", "ipconfig /renew" from an MS-DOS prompt will force the client to re-register with the primary WINS server.

  • Using DHCP reservations allows administrators to have a central point of reference for all IP allocations in the organization. When you use DHCP Administrator (Mappings/Show Reservations), a complete list of active reservations as well as active leases is available in one location. This is a major advantage, especially when you are tracking down particular clients or even reassigning new scopes.

NOTE: It is important to understand that using DHCP reservations has no basic functional difference from statically assigning a client an IP address. A client will not function any differently with basic WINS configurations (that is, expiration, release, re-registration, and so on), but will only be capable of re-registering itself on the fly when configured though DHCP (that is, ipconfig /renew). Hence, if you statically assign a server an IP address and need to refresh its WINS registration, you will need to execute a restart.

Keywords: kbnetwork KB170062