思科跨路由器的单臂路由如何解决 思科跨路由器的单臂路由怎么

思科跨路由器的单臂路由如何解决 思科跨路由器的单臂路由怎么 　R1配置:

　　R1#conf t

　　R1(config)#int f0/0

　　R1(config-if)#no shutdown

　　R1(config-if)#int f0/0.2

　　R1(config-subif)#encapsulation dot1q 2

　　R1(config-subif)#ip address 192.168.2.254 255.255.255.0

　　R1(config-subif)#no shutdown

　　R1(config-subif)#exit

　　R1(config)#int f0/0.3

　　R1(config-subif)#encapsulation dot1q 3

　　R1(config-subif)#ip address 192.168.3.254 255.255.255.0

　　R1(config-subif)#no shutdown

　　R1(config-subif)#exit

　　R1(config)#int s1/0

　　R1(config-if)#ip address 1.1.1.1 255.255.255.0

　　R1(config-if)#no shutdown

　　R1(config-if)#end

　　R1#conf t

　　R1(config)#router ospf 1

　　R1(config-router)#network 192.168.2.0 0.0.0.255 area 0

　　R1(config-router)#network 192.168.3.0 0.0.0.255 are 0

　　R1(config-router)#network 1.1.1.0 0.0.0.255 area 0

　　R1(config-router)#end

　　R2配置:

　　R2#conf t

　　R2(config)#int s0/0

　　R2(config-if)#ip address 1.1.1.2 255.255.255.0

　　R2(config-if)#no shutdown

　　R2(config-if)#clock rate 64000

　　R2(config-if)#exit

　　R2(config)#int s0/1

　　R2(config-if)#ip address 2.1.1.1 255.255.255.0

　　R2(config-if)#no shutdown

　　R2(config-if)#clock rate 64000

　　R2(config-if)#end

　　R2#conf t

　　R2(config)#router ospf 2

　　R2(config-router)#network 2.1.1.0 0.0.0.255 area 0

　　R2(config-router)#network 1.1.1.0 0.0.0.255 area 0

　　R2(config-router)#end

　　R3配置:

　　R3#conf t

　　R3(config)#int s1/0

　　R3(config-if)#ip address 2.1.1.2 255.255.255.0

　　R3(config-if)#no shutdown

　　R3(config)#int f0/0

　　R3(config-if)#no shutdown

　　R3(config-if)#int f0/0.2

　　R3(config-subif)#encapsulation dot1q 2

　　R3(config-subif)#ip address 172.16.2.254 255.255.255.0

　　R3(config-subif)#no shutdown

　　R3(config-subif)#exit

　　R3(config)#int f0/0.3

　　R3(config-subif)#encapsulation dot1q 3

　　R3(config-subif)#ip address 172.16.3.254 255.255.255.0

　　R3(config-subif)#no shutdown

　　R3(config-subif)#end

　　R3(config)#router ospf 3

　　R3(config-router)#network 172.16.2.0 0.0.0.255 area 0

　　R3(config-router)#network 172.16.3.0 0.0.0.255 area 0

　　R3(config-router)#network 2.1.1.0 0.0.0.255 area 0

　　R3(config-router)#end

　　查看路由表：

　　R1#show ip route

　　Gateway of last resort is not set

　　1.0.0.0/24 is subnetted, 1 subnets

　　C 1.1.1.0 is directly connected, Serial1/0

　　2.0.0.0/24 is subnetted, 1 subnets

　　O 2.1.1.0 [110/128] via 1.1.1.2, 00:03:37, Serial1/0

　　172.16.0.0/24 is subnetted, 2 subnets

　　O 172.16.2.0 [110/129] via 1.1.1.2, 00:03:37, Serial1/0

　　O 172.16.3.0 [110/129] via 1.1.1.2, 00:03:37, Serial1/0

　　C 192.168.2.0/24 is directly connected, FastEthernet0/0.2

　　C 192.168.3.0/24 is directly connected, FastEthernet0/0.3

　　R2#show ip route

　　Gateway of last resort is not set

　　1.0.0.0/24 is subnetted, 1 subnets

　　C 1.1.1.0 is directly connected, Serial0/0

　　2.0.0.0/24 is subnetted, 1 subnets

　　C 2.1.1.0 is directly connected, Serial0/1

　　172.16.0.0/24 is subnetted, 2 subnets

　　O 172.16.2.0 [110/65] via 2.1.1.2, 00:03:37, Serial0/1

　　O 172.16.3.0 [110/65] via 2.1.1.2, 00:03:37, Serial0/1

　　O 192.168.2.0/24 [110/65] via 1.1.1.1, 00:03:37, Serial0/0

　　O 192.168.3.0/24 [110/65] via 1.1.1.1, 00:03:37, Serial0/0

　　R3#show ip route

　　Gateway of last resort is not set

　　1.0.0.0/24 is subnetted, 1 subnets

　　O 1.1.1.0 [110/128] via 2.1.1.1, 00:03:43, Serial1/0

　　2.0.0.0/24 is subnetted, 1 subnets

　　C 2.1.1.0 is directly connected, Serial1/0

　　172.16.0.0/24 is subnetted, 2 subnets

　　C 172.16.2.0 is directly connected, FastEthernet0/0.2

　　C 172.16.3.0 is directly connected, FastEthernet0/0.3

　　O 192.168.2.0/24 [110/129] via 2.1.1.1, 00:03:43, Serial1/0

　　O 192.168.3.0/24 [110/129] via 2.1.1.1, 00:03:43, Serial1/0

　　SW1配置:

　　SW1#vlan database

　　SW1(vlan)#vlan 2

　　SW1(vlan)#vlan 3

　　SW1(vlan)#exit

　　SW1#conf t

　　SW1(config)#int f0/15

　　SW1(config-if)#switchport mode trunk

　　SW1(config-if)#switchport trunk encapsulation dot1q

　　SW1(config-if)#exit

　　SW1(config)#int f0/2

　　SW1(config-if)#switchport mode access

　　SW1(config-if)#switchport access vlan 2

　　SW1(config-if)#exit

　　SW1(config)#int f0/3

　　SW1(config-if)#switchport mode access

　　SW1(config-if)#switchport access vlan 3

　　SW1(config-if)#end

　　SW2配置:

　　SW2#vlan database

　　SW2(vlan)#vlan 2

　　SW2(vlan)#vlan 3

　　SW2(vlan)#exit

　　SW2#conf t

　　SW2(config)#int f0/15

　　SW2(config-if)#switchport mode trunk

　　SW2(config-if)#switchport trunk encapsulation dot1q

　　SW2(config-if)#exit

　　SW2(config)#int f0/2

　　SW2(config-if)#switchport access vlan 2

　　SW2(config-if)#exit

　　SW2(config)#int f0/3

　　SW2(config-if)#switchport mode access

　　SW2(config-if)#switchport access vlan 3

　　SW2(config-if)#end

　　验证：

　　PC1:

　　PC1#ping 192.168.3.3

　　Type escape sequence to abort.

　　Sending 5, 100-byte ICMP Echos to 192.168.3.3, timeout is 2 seconds:

　　!!!!!

　　Success rate is 100 percent (5/5), round-trip min/avg/max = 188/246/300 ms

　　PC1#ping 172.16.2.2

　　Type escape sequence to abort.

　　Sending 5, 100-byte ICMP Echos to 172.16.2.2, timeout is 2 seconds:

　　!!!!!

　　Success rate is 100 percent (5/5), round-trip min/avg/max = 408/487/528 ms

　　PC1#ping 172.16.3.3

　　Type escape sequence to abort.

　　Sending 5, 100-byte ICMP Echos to 172.16.3.3, timeout is 2 seconds:

　　!!!!!

　　Success rate is 100 percent (5/5), round-trip min/avg/max = 384/441/492 ms

　　PC3:

　　PC3#ping 172.16.3.3

　　Type escape sequence to abort.

　　Sending 5, 100-byte ICMP Echos to 172.16.3.3, timeout is 2 seconds:

　　!!!!!

　　Success rate is 100 percent (5/5), round-trip min/avg/max = 168/258/348 ms

　　PC3#ping 192.168.2.2

　　Type escape sequence to abort.

　　Sending 5, 100-byte ICMP Echos to 192.168.2.2, timeout is 2 seconds:

　　!!!!!

　　Success rate is 100 percent (5/5), round-trip min/avg/max = 348/400/452 ms

　　PC3#ping 192.168.3.3

　　Type escape sequence to abort.

　　Sending 5, 100-byte ICMP Echos to 192.168.3.3, timeout is 2 seconds:

　　!!!!!

　　Success rate is 100 percent (5/5), round-trip min/avg/max = 312/396/516 ms