实验拓扑图:
实验目的
在配置完OSPF协议以后,用show ip route 命令查看每个路由表都能学到各自的路由,
当在R3上先配置启用MD5认证以后,虽然R1上有到R3上的路由,但此时再到R1上来PING R3,你会发现是PING不通的,
只有在所有路由器上都启用了MD5认证以后彼此才能通信,这样就增加了路由的安全性.
1. 起用OSPF协议,进程号 100
2. 启用认证MD5
3. 启用R2做DR R3做BDR
4. 设R1的COST值为 40
实验命令
R1: |
R2: |
R3: |
En Conf t Int s0/1 Ip add 150.17.232.1 255.255.254 No shutdown Int loop 1 Ip add 1.1.1.1 255.255.255.0 Exit 启用OSPF协议 Conf t Router ospf 100 Net 150.17.232.0 0.0.1.255 area 0 Net 1.1.1.1 0.0.0.0 area 0 exit 启用MD5认证 Conf t Router ospf 100 Area 0 authentication message-digest Exit Int s0/1 Ip ospf message-digest-key 1 md5 allan 设置R1的cost值为 40 Conf t Int s0/1 ip ospf cost 40 |
En Conf t Int s0/0 Ip add 150.17.232.2 255.255.254 No shutdown Int s0/1 Ip add 192.168.2.1 255.255.255.0 Int loop 1 Ip add 2.2.2.2 255.255.255.0 Exit 启用OSPF协议 Conf t Router ospf 100 Net 150.17.232.0 0.0.1.255 area 0 Net 192.168.2.0 0.0.0.255 area 0 Net 2.2.2.2 0.0.0.0 area 0 exit 启用MD5认证 Conf t Router ospf 100 Area 0 authentication message-digest Exit Int s0/0 Ip ospf message-digest-key 1 md5 allan Int s0/1 Ip ospf message-digest-key 1 md5 allan 设置R2为DR Int s0/0 ip ospf priority 100 Exit |
En Conf t Int s0/0 Ip add 192.168.2.2 255.255.0 No shutdown Int loop 1 Ip add 3.3.3.3 255.255.255.0 Exit 启用OSPF协议 Conf t Router ospf 100 Net 192.168.2.0 0 0.0.0.255 area 0 Net 3.3.3.3 0.0.0.0 area 0 exit 启用MD5认证 Conf t Router ospf 100 Area 0 authentication message-digest Exit Int s0/0 Ip ospf message-digest-key 1 md5 allan 设置R3为BDR Conf t Int s0/0 Ip ospf priority 60 |
R1的配置:
R1#show run
Building configuration...
*Mar 1 01:18:13.415: %SYS-5-CONFIG_I: Configured from console by console
Current configuration : 1155 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
memory-size iomem 5
ip cef
!
interface Loopback1
ip address 1.1.1.1 255.255.255.0
interface Serial0/0
no ip address
shutdown
serial restart-delay 0
interface Serial0/1
ip address 150.17.232.1 255.255.254.0
ip ospf message-digest-key 1 md5 cisco
ip ospf cost 40
serial restart-delay 0
interface Serial0/2
no ip address
shutdown
serial restart-delay 0
router ospf 100
log-adjacency-changes
area 0 authentication message-digest
network 1.1.1.1 0.0.0.0 area 0
network 150.17.232.0 0.0.1.255 area 0
ip http server
no ip http secure-server!
control-plane
!
line con 0
exec-timeout 0 0
logging synchronous
line aux 0
line vty 0 4
!
End
R2的配置:
R2(config)#do show run
Building configuration...
Current configuration : 1385 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
memory-size iomem 5
!
ip cef
interface Loopback1
ip address 2.2.2.2 255.255.255.0
!
interface Serial0/0
ip address 150.17.232.2 255.255.254.0
ip virtual-reassembly
ip ospf message-digest-key 1 md5 cisco
ip ospf priority 100
serial restart-delay 0
!
interface Serial0/1
ip address 192.168.2.1 255.255.255.0
ip virtual-reassembly
ip ospf message-digest-key 1 md5 cisco
serial restart-delay 0
!
interface Serial0/2
no ip address
ip virtual-reassembly
serial restart-delay 0
!
router ospf 100
log-adjacency-changes
area 0 authentication message-digest
network 2.2.2.2 0.0.0.0 area 0
network 150.17.232.0 0.0.1.255 area 0
network 192.168.2.0 0.0.0.255 area 0
!
ip http server
no ip http secure-server
!
control-plane
!
line con 0
exec-timeout 0 0
logging synchronous
line aux 0
line vty 0 4
login
!
End
R3的配置:
R3#show run
Building configuration...
Current configuration : 1164 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
memory-size iomem 5
!
ip cef
!
interface Loopback1
ip address 3.3.3.3 255.255.255.0
!
interface Serial0/0
ip address 192.168.2.2 255.255.255.0
ip ospf message-digest-key 1 md5 cisco
ip ospf priority 60
serial restart-delay 0
!
interface Serial0/1
no ip address
shutdown
serial restart-delay 0
router ospf 100
log-adjacency-changes
area 0 authentication message-digest
network 3.3.3.3 0.0.0.0 area 0
network 192.168.2.0 0.0.0.255 area 0
!
ip http server
no ip http secure-server
control-plane
!
line con 0
exec-timeout 0 0
logging synchronous
line aux 0
line vty 0 4
login
!
end
本文转自allanhi 51CTO博客，原文链接：http://blog.51cto.com/allanfan/217554，如需转载请自行联系原作者
