三层交换做DHCP服务，实现各PC自动获得ip，各vlan互通。



三层交换配置：

interface Vlan10
ip address 192.168.10.1 255.255.255.0
!
interface Vlan20
ip address 192.168.20.1 255.255.255.0
!
interface Vlan30
ip address 192.168.30.1 255.255.255.0
!
interface Vlan40
ip address 192.168.40.1 255.255.255.0
!
ip classless
!
!
!
ip dhcp excluded-address 192.168.10.1 192.168.10.10
ip dhcp excluded-address 192.168.20.1 192.168.20.10
ip dhcp excluded-address 192.168.30.1 192.168.30.10
ip dhcp excluded-address 192.168.40.1 192.168.40.10
!
ip dhcp pool vlan10
network 192.168.10.0 255.255.255.0
default-router 192.168.10.1
dns-server 10.1.1.1

ip dhcp pool vlan20
network 192.168.20.0 255.255.255.0
default-router 192.168.20.1
dns-server 10.1.1.1

ip dhcp pool vlan30
network 192.168.30.0 255.255.255.0
default-router 192.168.30.1
dns-server 10.1.1.1

ip dhcp pool vlan40
network 192.168.40.0 255.255.255.0
default-router 192.168.40.1
dns-server 10.1.1.1

二层交换配置：
vlan 10
vlan 20
int rang f0/1-8
sw acc vlan 10
int rang f0/9-16
sw acc  vlan 20
int f0/24
sw mode  trunk
另一个交换机亦如此

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