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Fat AP and Cloud AP V200R008C00 CLI-based Configuration Guide

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Application Scenarios for DHCP

Application Scenarios for DHCP

Application Scenarios of the DHCP Server

For unified management and control over network hosts, a DHCP server can be deployed on a network to allocate network parameters including IP addresses to the hosts, as shown in Figure 7-72.
Figure 7-72  A device functioning as a DHCP server on a network
A DHCP server is often configured in the following scenarios:
  • Hosts in small-scale locations, such as a restaurant, internet café, or private company, connect to the Internet through an egress gateway.

    To allocate network parameters including IP addresses to the hosts, the egress gateway can be configured as a DHCP server. This facilitates host management and control.

  • Departments on a campus network are assigned different network segments.

    To allow hosts on each network segment to dynamically obtain network parameters including IP addresses, a DHCP server can be configured. If the DHCP server is not located on the same network segment as the clients, a DHCP relay agent must be deployed.

DHCP Relay Application

Figure 7-73 shows typical networking of DHCP relay.

Figure 7-73  Typical networking of DHCP relay

The earlier DHCP protocol applies to only the scenario that the DHCP client and DHCP server are on the same network segment. To dynamically assign IP addresses to hosts on network segments, the network administrator needs to configure a DHCP server on each network segment, which increases costs.

The DHCP relay function is introduced to solve this problem. A DHCP client can apply to the DHCP server on another network segment to obtain a valid IP address. In this manner, DHCP clients on multiple network segments can share one DHCP server. This reduces costs and facilitates centralized management.

Application Scenarios of the DHCP Client

As shown in Figure 7-74, to uniformly configure and manage IP addresses of multiple devices, devices can be configured as DHCP clients to obtain network parameters including IP addresses from a DHCP server, implementing remote management.

Figure 7-74  A device functioning as a DHCP client on a network
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Updated: 2019-01-11

Document ID: EDOC1000176006

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