OSPF虚链路的实现

圣诞老人

今天我的同事在学习CCNP的知识，在学习到OSPF的时候，对其中的虚链路是如何实现的不是很明白，我将整个的实验过程给他演示了一遍，现在将=演示的配置结果列出来，与大家共享一下，请高手多多指教。
拓扑图：（四个路由器）
     R1(s1/0)----(s1/0)R2(s1/1)----(s1/1)R3(s1/0)----(s1/0)R4

配置内容：
R1：
R1#show running-config
Building configuration...
Current configuration : 1535 bytes
!
version 12.4
service timestamps debug datetime msec
service timestamps log datetime msec
no service password-encryption
!
hostname R1
!
boot-start-marker
boot-end-marker
!
no aaa new-model
!
resource policy
!
ip subnet-zero
!
ip cef
!
username cosco privilege 15 secret 5 $1$Ipth$dVhmF.Sp.WULRVwrVbitb0
!
!
interface Loopback0
ip address 192.168.2.1 255.255.255.0
!
interface FastEthernet0/0
no ip address
shutdown
duplex auto
speed auto
!
interface FastEthernet0/1
no ip address
shutdown
duplex auto
speed auto
!
interface Serial1/0
ip address 192.168.1.1 255.255.255.0
serial restart-delay 0
!
interface Serial1/1
no ip address
shutdown
serial restart-delay 0
!         
interface Serial1/2
no ip address
shutdown
serial restart-delay 0
!
interface Serial1/3
no ip address
shutdown
serial restart-delay 0
!
interface Serial3/0
no ip address
shutdown
serial restart-delay 0
!
interface Serial3/1
no ip address
shutdown
serial restart-delay 0
!
interface Serial3/2
no ip address
shutdown
serial restart-delay 0
!
interface Serial3/3
no ip address
shutdown
serial restart-delay 0
!
router ospf 100
log-adjacency-changes
network 192.168.1.0 0.0.0.255 area 0
network 192.168.2.0 0.0.0.255 area 0
!
ip classless
!
no ip http server
no ip http secure-server
!
control-plane
!
gatekeeper
shutdown
!
!
line con 0
logging synchronous
stopbits 1
line aux 0
stopbits 1
line vty 0 4
privilege level 15
login local
transport input telnet
!
!
end

R2：
R2#show running-config
Building configuration...
Current configuration : 1647 bytes
!
version 12.4
service timestamps debug datetime msec
service timestamps log datetime msec
no service password-encryption
!
hostname R2
!
boot-start-marker
boot-end-marker
!
!
no aaa new-model
!
resource policy
!
ip subnet-zero
!
!
ip cef
!
username cosco privilege 15 secret 5 $1$/Gls$I0OLSV7s4qexdXvxWa5BF/
!
interface Loopback0
ip address 172.16.2.1 255.255.255.0
!
interface FastEthernet0/0
no ip address
shutdown
duplex auto
speed auto
!
interface FastEthernet0/1
no ip address
shutdown
duplex auto
speed auto
!
interface Serial1/0
ip address 192.168.1.2 255.255.255.0
serial restart-delay 0
!
interface Serial1/1
ip address 172.16.1.1 255.255.255.0
serial restart-delay 0
!
interface Serial1/2
no ip address
shutdown
serial restart-delay 0
!
interface Serial1/3
no ip address
shutdown
serial restart-delay 0
!
interface Serial3/0
no ip address
shutdown
serial restart-delay 0
!
interface Serial3/1
no ip address
shutdown
serial restart-delay 0
!
interface Serial3/2
no ip address
shutdown
serial restart-delay 0
!
interface Serial3/3
no ip address
shutdown
serial restart-delay 0
!
router ospf 100
log-adjacency-changes
area 1 virtual-link 172.16.3.1
network 172.16.1.0 0.0.0.255 area 1
network 172.16.2.0 0.0.0.255 area 1
network 192.168.1.0 0.0.0.255 area 0
!
ip classless
!
no ip http server
no ip http secure-server
!   
control-plane
!
gatekeeper
shutdown
!
line con 0
privilege level 15
logging synchronous
login local
stopbits 1
line aux 0
stopbits 1
line vty 0 4
privilege level 15
login local
transport input telnet
!         
!
end

R3：
R3#show running-config
Building configuration...
Current configuration : 1613 bytes
!
version 12.4
service timestamps debug datetime msec
service timestamps log datetime msec
no service password-encryption
!
hostname R3
!
boot-start-marker
boot-end-marker
!
!
no aaa new-model
!
resource policy
!
ip subnet-zero
!
!
ip cef
!
username cosco privilege 15 secret 5 $1$yaI7$w0r5O.pF5rdaihVsCEaAp.
interface Loopback0
ip address 172.16.3.1 255.255.255.0
!
interface FastEthernet0/0
no ip address
shutdown
duplex auto
speed auto
!
interface FastEthernet0/1
no ip address
shutdown
duplex auto
speed auto
!
interface Serial1/0
ip address 10.10.10.10 255.255.255.0
serial restart-delay 0
!
interface Serial1/1
ip address 172.16.1.2 255.255.255.0
serial restart-delay 0
!
interface Serial1/2
no ip address
shutdown
serial restart-delay 0
!
interface Serial1/3
no ip address
shutdown
serial restart-delay 0
!
interface Serial3/0
no ip address
shutdown
serial restart-delay 0
!
interface Serial3/1
no ip address
shutdown
serial restart-delay 0
!
interface Serial3/2
no ip address
shutdown
serial restart-delay 0
!
interface Serial3/3
no ip address
shutdown
serial restart-delay 0
!
router ospf 100
log-adjacency-changes
area 1 virtual-link 172.16.2.1
network 10.10.10.0 0.0.0.255 area 2
network 172.16.1.0 0.0.0.255 area 1
network 172.16.3.0 0.0.0.255 area 1
!
ip classless
!
no ip http server
no ip http secure-server
!   
control-plane
!
gatekeeper
shutdown
!
line con 0
logging synchronous
stopbits 1
line aux 0
stopbits 1
line vty 0 4
privilege level 15
login local
transport input telnet
!
!
end

R4:
R4#show running-config
Building configuration...
Current configuration : 1532 bytes
!
version 12.4
service timestamps debug datetime msec
service timestamps log datetime msec
no service password-encryption
!
hostname R4
!
boot-start-marker
boot-end-marker
!
!
no aaa new-model
!
resource policy
!
ip subnet-zero
!
!
ip cef
!
username cosco privilege 15 secret 5 $1$nRci$HGraeeYUPkkoanbI5IOIf.
!
interface Loopback0
ip address 10.10.20.1 255.255.255.0
!
interface FastEthernet0/0
no ip address
shutdown
duplex auto
speed auto
!
interface FastEthernet0/1
no ip address
shutdown
duplex auto
speed auto
!
interface Serial1/0
ip address 10.10.10.20 255.255.255.0
serial restart-delay 0
!
interface Serial1/1
no ip address
shutdown
serial restart-delay 0
!         
interface Serial1/2
no ip address
shutdown
serial restart-delay 0
!
interface Serial1/3
no ip address
shutdown
serial restart-delay 0
!
interface Serial3/0
no ip address
shutdown
serial restart-delay 0
!
interface Serial3/1
no ip address
shutdown
serial restart-delay 0
!
interface Serial3/2
no ip address
shutdown
serial restart-delay 0
!
interface Serial3/3
no ip address
shutdown
serial restart-delay 0
!
router ospf 100
log-adjacency-changes
network 10.10.10.0 0.0.0.255 area 2
network 10.10.20.0 0.0.0.255 area 2
!
ip classless
!
no ip http server
no ip http secure-server
!
control-plane
!
gatekeeper
shutdown
!
line con 0
logging synchronous
stopbits 1
line aux 0
stopbits 1
line vty 0 4
privilege level 15
login local
transport input telnet
!
!
end

本文来自ChinaUnix博客，如果查看原文请点：http://blog.chinaunix.net/u/12297/showart_406750.html