前言
当前VPP代码实现的DHCP功能是以插件的方式实现的DHCP功能，其代码路径为：src/plugin/dhcp 文件夹下。当前VPP在实现DHCP功能时，没有实现DHCP server功能。其按照接口方式使能和配置DHCP功能，其支持的配置如下所示
代码语言：javascript复制#按照接口使能DHCP客户端 ，以vpp 18.04为例子
功能：基于接口配置DHCP4 客户端
配置命令：set dhcp client [del] intfc <interface> [hostname <name>].
Declaration and implementation
Declaration: dhcp_client_set_command (src/vnet/dhcp/client.c line 1150)
Implementation: dhcp_client_set_command_fn.查询DHCP客户端的方法
代码语言：javascript复制命令：show dhcp client [intfc <intfc>][verbose].
Declaration and implementation
Declaration: show_dhcp_client_command (src/vnet/dhcp/client.c line 872)
Implementation: show_dhcp_client_command_fn.配置DHCP option 82的配置方法
代码语言：javascript复制set dhcp option-82 vss [del] table <table id> [oui <n> vpn-id <n> | vpn-ascii-id <text>].
Declaration and implementation
Declaration: dhcp_proxy_vss_command (src/vnet/dhcp/dhcp4_proxy_node.c line 985)
Implementation: dhcp_option_82_vss_fn.查看DHCP option-82的配置方法
代码语言：javascript复制查询DHCP option-82的配置
命令：show dhcp option-82-address interface <interface>.
Declaration and implementation
Declaration: dhcp_proxy_address_show_command (src/vnet/dhcp/dhcp4_proxy_node.c line 1051)
Implementation: dhcp_option_82_address_show_command_fn.设置DHCP proxy的方法
代码语言：javascript复制#配置方法
set dhcpv6 proxy [del] server <ipv6-addr> src-address <ipv6-addr> [server-fib-id <fib-id>] [rx-fib-id <fib-id>] .
Declaration and implementation
Declaration: dhcpv6_proxy_set_command (src/vnet/dhcp/dhcp6_proxy_node.c line 990)
Implementation: dhcpv6_proxy_set_command_fn.
#查询dhcp 代理配置
命令： show dhcp proxy
功能：Display dhcp proxy server info.
Declaration and implementation
Declaration: dhcp_proxy_show_command (src/vnet/dhcp/dhcp4_proxy_node.c line 934)
Implementation: dhcp4_proxy_show_command_fn.二、搭建DHCP4 server
该部分后续章节再介绍
三、配置dhcp 客户端
1、在接口上配置DHCP 客户端
代码语言：javascript复制set dhcp client [del] intfc <interface> [hostname <name>]2、创建举例
代码语言：javascript复制# 在虚拟机上 创建接口
create interface vmxnet3 0000:13:00.0 bind
#添加
set dhcp client intfc vmxnet3-0/13/0/0 hostname vppgate
#查看
show dhcp client intfc vmxnet3-0/13/0/0
#删除
set dhcp client del intfc vmxnet3-0/13/0/03、查询是否能够从服务端拿到IP地址
代码语言：javascript复制vpp# show int addr
local0 (dn):
vmxnet3-0/13/0/0 (up):
L3 10.241.100.11/16
vpp# show dhcp client
[0] vmxnet3-0/13/0/0 state DHCP_BOUND installed 1 addr 10.241.100.11/16 gw 10.241.255.254 server 10.241.4.6 dns 8.8.8.8 dns 4.4.4.4
四、DHCPv4 协议介绍
文档 rfc 2131 在后续章节中介绍；
写在最后
