用思科模拟器6.0配置DHCP，能使在同一网段的不同VLAN获取IP地址，请高人详细说明，谢谢

Question

如图举例配置第一个二层交换机

Answer 1

同一网段的不同VLAN？这个说法比较高级，事实上普通VLAN不能在同一网段，否则会无法路由。

特殊的VLAN可以做到同一网段不同VLAN，但思科模拟器是不可能做出来的。

不同网段不同VLAN的做法很简单，在每个VLAN中广播DHCP范围即可，需要建立int vlan

Answer 2

R5

enable
configure terminal
hostname R5
exit
vlan database
vlan 90 name jsb
vlan 100 name yfb
exit
conf t
ip dhcp pool vlan90
network 192.168.9.0 255.255.255.128
default-router 192.168.9.126
dns-server 202.103.224.68
exit
ip dhcp pool vlan100
network 192.168.9.128 255.255.255.128
default-router 192.168.9.254
dns-server 202.103.224.68
exit
interface f0/0
ip address 192.168.102.1 255.255.255.0
no shutdown
interface FastEthernet 1/0
shutdown
no ip address
exit
interface FastEthernet 1/0.1
encapsulation dot1Q 90
ip address 192.168.9.126 255.255.255.128
no shutdown
exit
interface FastEthernet 1/0.2
encapsulation dot1Q 100
ip address 192.168.9.254 255.255.255.128
no shutdown
exit
interface FastEthernet 1/0
no shutdown
exit
router ospf 1
router-id 5.5.5.5
network 192.168.102.0 0.0.0.255 area 0
network 192.168.9.0 0.0.0.255 area 0
end

——————————————————————
R5下的sw6

enable
conf t
hostname sw6
exit
vlan database
vlan 90 name jsb
vlan 100 name yfb
exit
conf t
interface FastEthernet0/24
switchport mode trunk
switchport trunk allowed vlan 90,100
exit
interface range FastEthernet0/1-10
switchport mode access
switchport access vlan 90
interface range FastEthernet0/11-20
switchport mode access
switchport access vlan 100
end