拓撲圖
三層交換機配置DHCP
步驟一、SW1配置VLAN
Switch>en
Switch#vl da
Switch(vlan)#vl 10
Switch(vlan)#vl 20
Switch(vlan)#vl 30
Switch(vlan)#exit
Switch#conf t
Switch(config)#in ra f0/1-10
Switch(config-if-range)#sw mo ac
Switch(config-if-range)#sw ac vl 10
Switch(config-if-range)#exit
Switch(config)#in ra f0/11-15
Switch(config-if-range)#sw mo ac
Switch(config-if-range)#sw ac vl 20
Switch(config-if-range)#exit
Switch(config)#in vl 30
Switch(config-if)#in ra f0/16-23
Switch(config-if-range)#sw mo ac
Switch(config-if-range)#sw ac vl 30
Switch(config-if-range)#exit
Switch(config)#ho SW1
SW1(config)#in f0/24
SW1(config-if)#sw mo tr
SW1(config)#end
SW1#sh vl br
步驟二、SW0配置VLAN
Switch>
Switch>en
Switch#vl da
Switch(vlan)#vl 10
Switch(vlan)#vl 20
Switch(vlan)#vl 30
Switch(vlan)#exit
Switch#conf t
Switch(config)#ho SW0
SW0(config)#ip routing
SW0(config)#in vl 10
SW0(config-if)#ip ad 192.168.10.1 255.255.255.0
SW0(config-if)#no sh
SW0(config-if)#exit
SW0(config)#in vl 20
SW0(config-if)#ip ad 192.168.20.1 255.255.255.0
SW0(config-if)#no sh
SW0(config-if)#exit
SW0(config)#in vl 30
SW0(config-if)#ip ad 192.168.30.1 255.255.255.0
SW0(config-if)#no sh
SW0(config-if)#exit
SW0(config)#in f0/23
SW0(config-if)#no sw
SW0(config-if)#ip ad 10.1.1.1 255.255.255.0
SW0(config-if)#no sh
SW0(config-if)#exit
SW0(config)#in f0/24
SW0(config-if)#sw tr al vl 10,20,30
SW0(config-if)#end
SW0#sh vl br
SW0#sh ru
步驟三、R1配置IP地址
Router>en
Router#conf t
Router(config)#ho R1
R1(config)#in f0/0
R1(config-if)#ip ad 10.1.1.2 255.255.255.0
R1(config-if)#no sh
R1(config-if)#exit
R1(config)#in f0/1
R1(config-if)#ip ad 100.1.1.1 255.255.255.0
R1(config-if)#no sh
R1(config-if)#end
R1#sh ru
步驟四、SW0和R1配置路由
SW0>en
SW0#conf t
SW0(config)#ip route 0.0.0.0 0.0.0.0 10.1.1.2
SW0(config)#end
SW0#sh ip ro
R1#conf t
R1(config)#ip route 192.168.10.0 255.255.255.0 10.1.1.1
R1(config)#ip route 192.168.20.0 255.255.255.0 10.1.1.1
R1(config)#ip route 192.168.30.0 255.255.255.0 10.1.1.1
R1(config)#end
R1#sh ip ro
步驟五、SW0配置DHCP
SW0(config)#ip dhcp excluded-address 192.168.10.1 //DHCP地址池做排除
SW0(config)#ip dhcp excluded-address 192.168.20.1 //DHCP地址池做排除
SW0(config)#ip dhcp excluded-address 192.168.30.1 //DHCP地址池做排除
SW0(config)#ip dhcp excluded-address 192.168.40.1 //DHCP地址池做排除
SW0(config)#in vl 10
SW0(config-if)#ip routing
SW0(config)#ip dhcp pool 10 //創建VLAN10的DHCP地址池10
SW0(dhcp-config)#network 192.168.10.0 255.255.255.0 //設置DHCP地址池網段
SW0(dhcp-config)#default-router 192.168.10.1 //設置默認網關地址
SW0(dhcp-config)#dns-server 202.100.192.68 //設置默認DNS地址
SW0(dhcp-config)#exit
SW0(config)#in vl 20
SW0(config-if)#ip routing
SW0(config)#ip dhcp pool 20
SW0(dhcp-config)#network 192.168.20.0 255.255.255.0
SW0(dhcp-config)#de
SW0(dhcp-config)#def 192.168.20.1
SW0(dhcp-config)#dns 202.100.192.68
SW0(dhcp-config)#exit
SW0(config)#in vl 30
SW0(config-if)#ip routing
SW0(config)#ip dhcp pool 30
SW0(dhcp-config)#network 192.168.30.0 255.255.255.0
SW0(dhcp-config)#de
SW0(dhcp-config)#def 192.168.30.1
SW0(dhcp-config)#dns 202.100.192.68
SW0(dhcp-config)#end
SW0#sh ru
步驟六、驗證DHCP可以分配IP地址、網關和DNS
將PC1，PC2，PC3的IP Configuration 設置成DHCP自動獲取
PC>ipconfig /release //釋放IP地址
IP Address......................: 0.0.0.0
Subnet Mask.....................: 0.0.0.0
Default Gateway.................: 0.0.0.0
DNS Server......................: 0.0.0.0
PC1>ipconfig /renew //獲取IP地址
IP Address......................: 192.168.10.2
Subnet Mask.....................: 255.255.255.0
Default Gateway.................: 192.168.10.1
DNS Server......................: 202.100.192.68
PC1>ping 100.1.1.2 //測試連通性
Pinging 100.1.1.2 with 32 bytes of data:
Reply from 100.1.1.2: bytes=32 time=1ms TTL=126
Reply from 100.1.1.2: bytes=32 time=0ms TTL=126
Reply from 100.1.1.2: bytes=32 time=0ms TTL=126
Reply from 100.1.1.2: bytes=32 time=0ms TTL=126
PC2和PC3同上