VLAN间的DHCP中继实验：结合Server2008DHCP服务器，为局域网的客户端跨vlan分配IP地址。
公司刚刚搬家，前期时间比较紧急，没时间把IP地址分配做好，利用“基于接口的DHCP”将就。可是后来问题就来了，出现了一些IP冲突的问题。于是就准备找一台windows作为局域网的DHCP服务器。于是乎就有了本次实验。
一、实验拓扑
cloud桥接一台server2008，server2008是安装在VM虚拟机里面的。
二、配置全网互通
AR1配置
[Huawei]sy AR1
[AR1]interface GigabitEthernet0/0/0
[AR1-GigabitEthernet0/0/0]
[AR1-GigabitEthernet0/0/0] ip address 192.168.30.1 255.255.255.0
[AR1-GigabitEthernet0/0/0]
##回执路由
ip route-static 192.168.0.0 255.255.0.0 192.168.30.254
SW1配置
interface GigabitEthernet0/0/1
port link-type trunk
port trunk allow-pass vlan all
interface GigabitEthernet0/0/2
port link-type trunk
port trunk allow-pass vlan all
interface GigabitEthernet0/0/3
port link-type trunk
port trunk allow-pass vlan all
vlan batch 10 20 30 60
interface Vlanif10
ip address 192.168.10.254 255.255.255.0
interface Vlanif20
ip address 192.168.20.254 255.255.255.0
interface Vlanif30
ip address 192.168.30.254 255.255.255.0
interface Vlanif60
ip address 192.168.60.254 255.255.255.0
SW2配置
vlan 10
q
interface GigabitEthernet0/0/1
port link-type trunk
port trunk allow-pass vlan all
interface Ethernet0/0/1
port link-type access
port default vlan 10
SW3配置
vlan 20
q
interface GigabitEthernet0/0/1
port link-type trunk
port trunk allow-pass vlan 2 to 4094
interface Ethernet0/0/1
port link-type access
port default vlan 20
SW5
interface GigabitEthernet0/0/1
port link-type trunk
port trunk allow-pass vlan all
interface Ethernet0/0/1
port link-type access
port default vlan 60
interface Ethernet0/0/2
port link-type access
port default vlan 60
三、接入DHCP服务器
利用cloud链接VM虚拟机
利用cloud链接VM虚拟机的server2008服务器，cloud增加两个端口1和2：
-
1用来链接交换机SW5
-
2用来桥接server2008
- Server2008单网卡，设置到vmnet1网络
- Server2008的IP地址设置为192.168.60.100/24，网关：192.168.60.254
搭建DHCP服务器
在server2008服务器上搭建DHCP服务：添加角色—勾选DHCP，下一步直到完成。
配置三个作用域：分别是vlan10、vlan20、vlan60(服务器)
这里如果搭建两台DHCP可以实现DHCP故障转移。
四、配置DHCP中继
在SW1上面配置DHCP中继
[SW1]dhcp enable
[SW1-Vlanif10] dhcp select relay
[SW1-Vlanif10] dhcp relay server-ip 192.168.60.100
[SW1-Vlanif10]q
[SW1]int vlan20
[SW1-Vlanif20] dhcp select relay
[SW1-Vlanif20] dhcp relay server-ip 192.168.60.100
[SW1-Vlanif20] q
[SW1]int vlan60
[SW1-Vlanif20] dhcp select relay
[SW1-Vlanif20] dhcp relay server-ip 192.168.60.100
[SW1-Vlanif20] q
五、验证结果
