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Configuration Guide - IP Service

CloudEngine 12800 and 12800E V200R005C00

This document describes the configurations of IP Service, including IP address, ARP, DHCP, DNS, IP performance optimization, IPv6, DHCPv6, and IPv6 DNS.

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Overview of DHCP

Overview of DHCP


Dynamic Host Configuration Protocol (DHCP) dynamically manages and configures clients in a centralized manner. It ensures proper IP address allocation and improves IP address utilization.


As the network scale and complexity of networks increase, the number of available IPv4 addresses is no longer sufficient. In addition, wireless networks and mobile devices mean that IPv4 addresses and client locations are liable to change. DHCP is introduced to automate the assignment of network parameters, including IPv4 addresses, to clients.

DHCP is based on the BOOTstrap Protocol (BOOTP), which runs on networks where each host has a fixed network connection. For each host using BOOTP, an administrator must configure a BOOTP parameter file that requires manual intervention to modify. DHCP improves on BOOTP by:

  • Dynamically allocating IP addresses and configuration parameters to hosts.
  • Enabling a host to dynamically obtain an IP address without specifying an IP address for each host.

DHCP ensures proper IP address allocation, which prevents IP address waste and improves IP address usage on the entire network.


Devices support DHCP snooping. For details about DHCP snooping, see the CloudEngine 12800 and 12800E Series Switches Configuration Guide -- Basic Configurations -- DHCP Snooping Configurations.

Updated: 2019-04-18

Document ID: EDOC1100039535

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