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Microsoft® Windows Server™ 2003 Inside Out by William R. Stanek

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Planning DHCP Implementations

Planning a new DHCP implementation or revamping your existing DHCP implementation requires a good understanding of how DHCP works. You need to know the following information:

  • How DHCP messages are sent and received

  • How DHCP relay agents are used

  • How multiple servers should be configured

DHCP Messages and Relay Agents

When a DHCP client is started, it uses network broadcasts to obtain or renew a lease from a DHCP server. These broadcasts are in the form of DHCP messages. A client obtains its initial lease as shown in Figure 25-1. Here, the client broadcasts a DHCP Discover message. All DHCP servers on the network respond to the broadcast with a DHCP Offer message, which offers the client an IP lease. The client accepts ...

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