OSPF实验

一、划分网段，配置IP、环回地址；配置指向r4的缺省路由

R1:   g0/0/0 172.16.3.2/24   lookback0 172.16.1.0/24

R2:   g0/0/0 172.16.3.3/24   lookback0 172.16.2.0/24

R3:   g0/0/0 172.16.3.1/24   s4/0/0 12.1.1.1/24    lookback0 172.16.4.0/24

         [R3]ip route-static 0.0.0.0 0.0.0.0 12.1.1.2

R4:   s3/0/0 12.1.1.2/24   s3/0/1 23.1.1.1/24   s4/0/1 45.1.1.1/24   s4/0/0 34.1.1.1/24

R5:   s4/0/0 23.1.1.2/24   lookback0 172.16.5.0/24   [R5]ip route-static 0.0.0.0 0.0.0.0 23.1.1.1

R6:   s4/0/0 34.1.1.2/24   g0/0/0 172.16.7.1/24   lookback0 172.16.6.0/24

         [R6]ip route-static 0.0.0.0 0.0.0.0 34.1.1.1

R7:   s4/0/0 45.1.1.2/24   g0/0/0 172.16.12.1/24   lookback0 172.16.11.0/24

        [R7]ip route-static 0.0.0.0 0.0.0.0 45.1.1.1

R8:   g0/0/0 172.16.12.2/24   g0/0/1 172.16.14.1/24   lookback0 172.16.13.0/24

R9:   g0/0/0 172.16.14.2/24   g0/0/1 172.16.16.1/24   lookback0 172.16.15.0/24

R10:   g0/0/0 172.16.16.2/24   g0/0/1 172.16.17.0/24

R11:   g0/0/0 172.16.7.2/24   g0/0/1 172.16.9.1/24   lookback0 172.16.18.0/24

R12:   g0/0/0 172.16.9.2/24   lookback0 172.16.10.0/24   lookback1 172.16.18.0/24
 

二、以R3为中心

R3

[R3]int Tunnel 0/0/0
[R3-Tunnel0/0/0]ip add 10.1.1.1 255.255.255.0
[R3-Tunnel0/0/0]tunnel-protocol gre p2mp
[R3-Tunnel0/0/0]source 12.1.1.1
[R3-Tunnel0/0/0]nhrp entry multicast dynamic
[R3-Tunnel0/0/0]nhrp network-id 100

R5

[R5]int Tunnel 0/0/0
[R5-Tunnel0/0/0]ip add 10.1.1.2 255.255.255.0
[R5-Tunnel0/0/0]tunnel-protocol gre p2mp
[R5-Tunnel0/0/0]source Serial 4/0/0
[R5-Tunnel0/0/0]nhrp network-id 100
[R5-Tunnel0/0/0]nhrp entry 10.1.1.1 12.1.1.1 register

R6

[R6]int Tunnel 0/0/0
[R6-Tunnel0/0/0]ip add 10.1.1.3 255.255.255.0
[R6-Tunnel0/0/0]tunnel-protocol gre p2mp
[R6-Tunnel0/0/0]source Serial 4/0/0
[R6-Tunnel0/0/0]nhrp network-id 100
[R6-Tunnel0/0/0]nhrp entry 10.1.1.1 12.1.1.1 register

R7

[R7]int Tunnel 0/0/0
[R7-Tunnel0/0/0]ip add 10.1.1.4 255.255.255.0
[R7-Tunnel0/0/0]tunnel-protocol gre p2mp
[R7-Tunnel0/0/0]source Serial 4/0/0
[R7-Tunnel0/0/0]nhrp network-id 100
[R7-Tunnel0/0/0]nhrp entry 10.1.1.1 12.1.1.1 register

三、宣告OSPF

[R1]ospf 1 router-id 172.16.1.1
[R1-ospf-1]area 1
[R1-ospf-1-area-0.0.0.1]network 172.16.1.1 0.0.0.0
[R1-ospf-1-area-0.0.0.1]network 172.16.3.2 0.0.0.0

[R2]ospf 1 router-id 172.16.2.1
[R2-ospf-1]area 1
[R2-ospf-1-area-0.0.0.1]network 172.16.2.1 0.0.0.0
[R2-ospf-1-area-0.0.0.1]network 172.16.3.3 0.0.0.0

[R3]ospf 1 router-id 172.16.4.1
[R3-ospf-1]area 1
[R3-ospf-1-area-0.0.0.1]network 172.16.3.1 0.0.0.0
[R3-ospf-1-area-0.0.0.1]network 172.16.4.1 0.0.0.0

[R5]ospf 1 router-id 172.16.5.1
[R5-ospf-1]area0
[R5-ospf-1-area-0.0.0.0]network 172.16.5.1 0.0.0.0

[R6]ospf 1 router-id 172.16.6.1
[R6-ospf-1]area 0
[R6-ospf-1-area-0.0.0.0]network 172.16.6.1 0.0.0.0
[R6]ospf 1
[R6-ospf-1]area 2
[R6-ospf-1-area-0.0.0.2]network 172.16.7.1 0.0.0.0

[R11]ospf 1 router-id 172.16.8.1
[R11-ospf-1]area 2
[R11-ospf-1-area-0.0.0.2]network 172.168.8.1 0.0.0.0
[R11-ospf-1-area-0.0.0.2]network 172.168.9.1 0.0.0.0
[R11-ospf-1-area-0.0.0.2]network 172.168.7.2 0.0.0.0

[R12]ospf 1 router-id 172.16.18.1
[R12-ospf-1]area 2
[R12-ospf-1-area-0.0.0.2]network 172.168.9.2 0.0.0.0

[R7]ospf 1 router-id 172.16.11.1
[R7-ospf-1]area 0
[R7-ospf-1-area-0.0.0.0]network 172.16.11.1 0.0.0.0
[R7-ospf-1]area 3
[R7-ospf-1-area-0.0.0.3]network 172.16.12.1 0.0.0.0

[R8]ospf 1 router-id 172.16.13.1
[R8-ospf-1]area 3
[R8-ospf-1-area-0.0.0.3]network 172.16.13.1 0.0.0.0
[R8-ospf-1-area-0.0.0.3]network 172.16.14.1 0.0.0.0
[R8-ospf-1-area-0.0.0.3]network 172.16.12.2 0.0.0.0

[R9]ospf 2 router-id 172.16.15.1
[R9-ospf-2]area 4
[R9-ospf-2-area-0.0.0.4]network 172.16.15.1 0.0.0.0
[R9-ospf-2-area-0.0.0.4]network 172.16.16.1 0.0.0.0

[R10]ospf 2 router-id 172.16.17.1
[R10-ospf-2]area 4
[R10-ospf-2-area-0.0.0.4]network 172.16.17.1 0.0.0.0
[R10-ospf-2-area-0.0.0.4]network 172.16.16.2 0.0.0.0
[R10-ospf-1]import-route ospf 2
[R10-ospf-1]q
[R10]ospf 2
[R10-ospf-2]import-route ospf 1

在ASBR路由器R12启动rip进程，将两条环回宣告进rip，再重发布 ，将不同协议产生的路由进行双向共享
[R12]rip
[R12-rip-1]version 2
[R12-rip-1]undo summary
[R12-rip-1]network 172.16.0.0
[R12-rip-1]q
[R12]ospf 1
[R12-ospf-1]import-route rip 1
[R12-ospf-1]q
[R12]rip
[R12-rip-1]import-route ospf 1

接下来优化网络，尽量减少LSA更新量
[R3]ospf 1
[R3-ospf-1]area 1
[R3-ospf-1-area-0.0.0.1]abr-summary 172.16.0.0 255.255.0.0

[R6]ospf 1
[R6-ospf-1]area 2
[R6-ospf-1-area-0.0.0.1]abr-summary 172.16.0.0 255.255.0.0

[R7]ospf 1
[R7-ospf-1]area 3
[R7-ospf-1-area-0.0.0.1]abr-summary 172.16.0.0 255.255.0.0

[R12]ospf 1
[R12-ospf-1]asbr-summary172.16.0.0 255.255.0.0

[R9]ospf 1
[R9-ospf-1]asbr-summary 172.16.0.0 255.255.0.0

将区域一设为末梢
[R1]ospf 1
[R1-ospf-1]area 1
[R1-ospf-1-area-0.0.0.1]stub

[R2]ospf 1
[R2-ospf-1]area 1
[R2-ospf-1-area-0.0.0.1]stub

[R3]ospf 1
[R3-ospf-1]area 1
[R3-ospf-1-area-0.0.0.1]stub
然后仅在R3上完全
[R3]ospf 1
[R3-ospf-1]area 1
[R3-ospf-1-area-0.0.0.1]stub no-summary
这就成了一个完全末梢区域

将区域2与区域3设置NSSA
[R6]ospf 1
[R6-ospf-1]area 2
[R6-ospf-1-area-0.0.0.1]nssa
[R11]ospf 1
[R11-ospf-1]area 2
[R11-ospf-1-area-0.0.0.1]nssa
[R12]ospf 1
[R12-ospf-1]area 2
[R12-ospf-1-area-0.0.0.1]nssa
然后仅在R6上完全NSSA
[R6]ospf 1
[R6-ospf-1]area 2
[R6-ospf-1-area-0.0.0.1]nssa no-summary