二、實驗拓撲圖
即：
三、實驗器材
拓撲圖挑選實驗器材如下：
1、 2台路由器2621XM
2、 1台交換機
3、 2台PC機
4、 一些相關連接線
四、實驗過程
1、按拓撲圖連接網絡中所有接點設備，寫出連接過程。
先將路由器R1的s0/0接口連接到路由器R2的s0/0接口，將路由器R1的f0/0接口連接到交換機的f0/1接口，將路由器R2的f0/0接口連接到交換機的f0/2，將交換機的f0/3端口連接到PC0，將交換機的f0/4端口連接到PC1
2、 配置路由器R1，寫出完整的配置命令。
Router>en
Router>config t
Router(config)#hostname R1
R1 (config)#
Router(config)#int s0/0
Router(config-if)#ip address 192.168.150.100 255.255.255.0
Router(config-if)#no shut
Router(config-if)#exit
Router(config)#int f0/0
Router(config-if)#ip address 192.168.100.100 255.255.255.0
Router(config-if)#no shut
Router(config-if)#exit
Router(config)#
Router(config)#
Router(config)#ip route 192.168.110.0 255.255.255.0 192.168.150.150
Router(config)#exit
Router#
%SYS-5-CONFIG_I: Configured from console by console
Router#show ip route
Codes: C - connected, S - static, I - IGRP, R - RIP, M - mobile, B - BGP
D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area
N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2
E1 - OSPF external type 1, E2 - OSPF external type 2, E - EGP
i - IS-IS, L1 - IS-IS level-1, L2 - IS-IS level-2, ia - IS-IS inter area
* - candidate default, U - per-user static route, o - ODR
P - periodic downloaded static route
Gateway of last resort is not set
C 192.168.100.0/24 is directly connected, FastEthernet0/0
S 192.168.110.0/24 [1/0] via 192.168.150.2
[1/0] via 192.168.150.150
C 192.168.150.0/24 is directly connected, Serial0/0
Router#
3、 配置路由器R2503-2，寫出完整的配置命令。
Router>en
Router>config t
Router(config)#hostname R2
R1 (config)#
Router(config)#int s0/0
Router(config-if)#ip address 192.168.150.150 255.255.255.0
Router(config-if)#no shut
Router(config-if)#exit
Router(config)#int f0/0
Router(config-if)#ip address 192.168.110.110 255.255.255.0
Router(config-if)#no shut
Router(config-if)#
Router(config-if)#ip route 192.168.100.0 255.255.255.0 192.168.150.100
Router(config)#exit
Router#
%SYS-5-CONFIG_I: Configured from console by console
Router#show ip route
Codes: C - connected, S - static, I - IGRP, R - RIP, M - mobile, B - BGP
D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area
N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2
E1 - OSPF external type 1, E2 - OSPF external type 2, E - EGP
i - IS-IS, L1 - IS-IS level-1, L2 - IS-IS level-2, ia - IS-IS inter area
* - candidate default, U - per-user static route, o - ODR
P - periodic downloaded static route
Gateway of last resort is not set
S 192.168.100.0/24 [1/0] via 192.168.150.1
[1/0] via 192.168.150.100
C 192.168.110.0/24 is directly connected, FastEthernet0/0
C 192.168.150.0/24 is directly connected, Serial0/0
Router#
4、 配置交換機S2950，寫出完整的配置命令。
Switch>
Switch>en
Switch#conf t
Enter configuration commands, one per line. End with CNTL/Z.
Switch(config)#vlan 110
Switch(config-vlan)#vlan 150
Switch(config-vlan)#exit
Switch(config)#int vlan 110
Switch(config-if)#
%LINK-5-CHANGED: Interface Vlan110, changed state to up
Switch(config-if)#ip address 192.168.100.0 255.255.255.0
Bad mask /24 for address 192.168.100.0
Switch(config-if)#ip address 192.168.100.1 255.255.255.0
Switch(config-if)#no shut
Switch(config-if)#exit
Switch(config)#int vlan 150
Switch(config-if)#
%LINK-5-CHANGED: Interface Vlan150, changed state to up
Switch(config-if)#ip address 192.168.150.1 255.255.255.0
Switch(config-if)#no shut
Switch(config-if)#exit
Switch(config)#
Switch(config)#
Switch(config)#int f0/1
Switch(config-if)#switchport mode access
Switch(config-if)#switchport access vlan 110
Switch(config-if)#exit
Switch(config)#int f0/2
Switch(config-if)#switchport mode access
Switch(config-if)#switchport access vlan 150
Switch(config-if)#exit
Switch(config)#int f0/3
Switch(config-if)#switchport mode access
Switch(config-if)#switchport access vlan 110
Switch(config-if)#exit
Switch(config)#int f0/4
Switch(config-if)#switchport mode access
Switch(config-if)#switchport access vlan 150
Switch(config-if)#exit
Switch(config)#
五、實驗測試
1、 Windows_pc1能否ping到192.168.100.100
2.pc1192.168.110.16能否ping通192.168.110.100
3.因為Windows_pc1與Windows_pc2是在不同的vlan里，要想使得Windows_pc1與Windows_pc2能連通，必須在R2503-1、R2503-2路由器中做路由。
路由命令如下：
Router1(config)#ip route 192.168.110.0 255.255.255.0 192.168.150.150
Router2(config-if)#ip route 192.168.100.0 255.255.255.0 192.168.150.100
怎樣查看路由？寫出命令。
六、實驗結論
兩台PC機可以跨網段ping通