Brief Introduction to DHCP Server Installation in Win System

We all know that DHCP can manage a large number of IP addresses and is an essential part of networking. As an administrator, we should better understand this knowledge. Next, we will explain how to configure the windows DHCP server.

Each DHCP server must have at least one address pool called a scope. These IP addresses are used for lease to clients. The scope of a DHCP server can include IP addresses of more than one subnet. Assume that the client broadcast in these subnets can reach the server. In this case, the DHCP server must have multiple addresses or a relay proxy to serve it. It also provides services to multiple subnets.

For a DHCP server, one scope can only contain one specific subnet, but one subnet can be divided into two or more DHCP servers to provide redundancy. Make sure that the same IP address does not exist in multiple servers, unless the address is a reserved address and will be followed by a reserved address ). DHCP servers do not share information with each other. Therefore, you must allocate addresses carefully to ensure that no non-reserved addresses in the address pool are duplicated. Figure 15-6 shows the scope of the two DHCP servers to provide redundancy in this way.

Consider DHCP server A on subnet 1 and DHCP server B on subnet 2. One of the scopes of server A and server B each has an IP address of subnet 1 and subnet 2 75%, while the other has an IP address of the remaining 25% of the remote subnet. Theoretically, server A processes all client requests on the local subnet 1 because it should respond to local requests faster than client B. If server A fails, server B will replace it. In this configuration, the specific division, such as 75/25 and 80/20, should be adjusted based on the observed rental rate, and some other factors should also be considered, for example, the relative network latency between the client and the two servers.

The interface that the DHCP server listens to is global for the server. You can configure this setting and conflict detection in the Properties window of the DHCP server.

1) Open the DHCP server management interface.

2) Move the focus to the server node, right-click it, and select "Properties ".

3) Select the "Advanced" tab.

4) use the Bindings button to access the binding dialog box.

5) configure the interface to be used by DHCP in the binding dialog box, and click "OK ".

6) If necessary, enter the number of attempts in the Advanced tab of the server Properties window to enable conflict detection.

7) Close the Properties window and click "OK" to save the modification.

On the Advanced tab, you should note that the log and DHCP database storage location can be configured. Conflict detection is a feature used by the DHCP server to determine that the IP address to be rented is not currently used by other machines. The specific implementation method is to try to communicate with the host using the IP address on the network. Conflict Detection obviously brings about a certain amount of overhead, which slows down the DHCP response to the client. in environments where strict control can be applied, this feature is unnecessary as a product setting, however, remember that this feature can be used to solve some problems.