DHCP Relay

Purpose ： solve DHCP How the server provides services for cross network segment access
requirement ：s C On different networks （ Network segment )
(1） Selection meets RFC 1542 Standard router , Can be DHCP Messages are forwarded to different networks
(2） Use DHCP Relay agent (DHCP Relay Agent), Have the ability to DHCP Forward the message to DHCP The function of the server

Premise

1、 Add two virtual networks VMnet1 and VMnet2, The type is host only mode , The subnet addresses are 192.168.10.0 and 192.168.20.0

2、 Prepare a virtual machine , The computer is named DNS1, Network adapter selection VMnet1, Turn off firewall ;

3、 Prepare a virtual machine , The computer is named （GW1）, And add a network adapter , Turn off firewall ;

4、 Prepare two computers , The computer names are Client1 and Client2,Client1 Your network adapter is VMnet1,Client2 Your network adapter is VMnet2.

One 、 Cross network DHCP The server （DNS1）

configure network

install DHCP


Create two scopes
Scope 1




Scope 2

Two 、 To configure DHCP Relay agent （GW1）

configure network



Add routing and remote access capabilities









Create a new routing protocol , choice DHCP Relay agent



Connection interface , Select no connection DNS The network card of the server , Namely dns1 yes DNS The server , He is vmnet0 Network card of , So we choose vmnet1 network card

3、 ... and 、 Verification and testing

To configure client1 The network card of is automatically obtained


hold client2 The network card of is set to obtain automatically