单臂路由
环境：小凡模拟器
.
设备：
3
台路由器
(3640)
，
1
台交换机
(3640)
IOS:
C3640-JSX-M
.bin
介绍：
将其中两台路由器作
PC1
和
PC2
，记住一定要关闭路由功能，否则实验不成功。因为他们会查路由表，而路由表没有另一个
vlan
的路由，所以不能
ping
通！
PC1
#show ip route
Codes: C - connected, S - static, 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
i - IS-IS, su - IS-IS summary, 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
172.16.0.0/24 is subnetted, 1 subnets
C 172.16.20.0 is directly connected, FastEthernet0/0
(
如
:PC1
如果没有关闭路由功能，它有自已的路由表，所以不能
ping
通
PC2-172.16.30.254)
，因此
必须要关闭两台
PC
的路由功能！
Router
配置：
Ip routing
interface FastEthernet0/0
no ip address
no shutdown
!
interface FastEthernet0/0.20
encapsulation dot1Q 20
ip address 172.16.20.1 255.255.255.0
!
interface FastEthernet0/0.30
encapsulation dot1Q 30
ip address 172.16.30.1 255.255.255.0
=========================
Switch
配置
:
interface FastEthernet0/0
switchport mode trunk
no
shutdown
!
interface FastEthernet0/2
switchport access vlan 20
no
shutdown
!
interface FastEthernet0/3
switchport access vlan 30
no
shutdown
!
Vlan database
Vlan 20
Vlan 30
Exit
=========================
PC1
配置：
no ip routing
interface FastEthernet0/0
ip address 172.16.20.254 255.255.255.0
no
shutdown
!
Ip default-gateway 172.16.20.1
=========================
PC2
配置：
no ip routing
interface FastEthernet0/0
ip address 172.16.
3
0.254 255.255.255.0
no
shutdown
!
Ip default-gateway 172.16.30.1
=========================
验证：
PC
2#ping 172.16.30.254
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 172.16.30.254, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 92/136/248 ms
PC
3#ping 172.16.20.254
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 172.16.20.254, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 104/128/156 ms