实验拓扑
实验目的
1、R4为ISP，其上只配置IP地址；R4与其他所直连设备间均使用公有IP；
2、R3-R5、R6、R7为MGRE环境，R3为中心站点；
3、整个OSPF环境IP基于172.16.0.0/16划分；除了R12有两个环回，其他路由器均有一个环回IP
4、所有设备均可访问R4的环回；
5、减少LSA的更新量，加快收敛，保障更新安全；
6、全网可达；
第一步：配置IP
R1
[R1-GigabitEthernet0/0/0]ip add 172.16.33.1 24
[R1-LoopBack0]ip add 172.16.34.1 24
R2
[R2-GigabitEthernet0/0/0]ip add 172.16.33.2 24
[R2-LoopBack0]ip add 172.16.35.1 24
R3
[R3-GigabitEthernet0/0/0]ip add 172.16.33.3 24
[R3-LoopBack0]ip add 172.16.36.1 24
[R3-LoopBack0]int s 4/0/0
[R3-Serial4/0/0]ip add 34.0.0.3 24
R4
[R4-Serial4/0/0]ip add 34.0.0.4 24
[R4-Serial3/0/0]ip add 40.0.0.4 24
[R4-Serial4/0/1]ip add 45.0.0.4 24
[R4-LoopBack0]ip add 172.16.2.1 24
[R4-GigabitEthernet0/0/1]ip add 47.0.0.4 24
R5
[R5-Serial4/0/0]ip add 45.0.0.5 24
[R5-LoopBack0]ip add 172.16.3.1 24
R6
[R6-GigabitEthernet0/0/0]ip add 172.16.65.6 30
[R6-LoopBack0]ip add 172.16.4.1 24
[R6-Serial4/0/0]ip add 40.0.0.6 24
R7
[R7-GigabitEthernet0/0/0]ip add 47.0.0.7 24
[R7-GigabitEthernet0/0/1]ip add 172.16.97.1 30
[R7-LoopBack0]ip add 172.16.5.1 24
R8
[R8-GigabitEthernet0/0/0]ip add 172.16.97.2 30
[R8-GigabitEthernet0/0/1]ip add 172.16.97.5 30
[R8-LoopBack0]ip add 172.16.98.1 24
R9
[R9-GigabitEthernet0/0/0]ip add 172.16.97.6 30
[R9-GigabitEthernet0/0/1]ip add 172.16.129.1 30
[R9-LoopBack0]ip add 172.16.130.1 24
R10
[R10-GigabitEthernet0/0/0]ip add 172.16.129.2 30
[R10-LoopBack0]ip add 172.16.131.1 24
R11
[R11-GigabitEthernet0/0/0]ip add 172.16.65.2 30
[R11-GigabitEthernet0/0/1]ip add 172.16.65.5 30
[R11-LoopBack0]ip add 172.16.66.1 24
R12
[R12-GigabitEthernet0/0/0]ip add 172.16.65.6 30
[R12-LoopBack0]ip add 172.16.160.1 24
[R12-LoopBack1]ip add 172.116.161.1 24
第二步：配置公网通和私网通
area0
R5：
[R5]ospf 1 router-id 5.5.5.5
[R5-ospf-1]area 0
[R5-ospf-1-area-0.0.0.0]network 172.16.3.0 0.0.0.255
R6
[R6]ospf 1
[R6-ospf-1]are
[R6-ospf-1]area 0
[R6-ospf-1-area-0.0.0.0]ne 172.16.4.0 0.0.0.255
R7
[R7]ospf 1
[R7-ospf-1]ar
[R7-ospf-1]are
[R7-ospf-1]area 0
[R7-ospf-1-area-0.0.0.0]ne 172.16.5.0 0.0.0.255
area 1
R1
[R1]ospf 1 rou
[R1]ospf 1 router-id 1.1.1.1
[R1-ospf-1]a 1
[R1-ospf-1-area-0.0.0.1]ne 172.16.33.1 0.0.0.0
[R1-ospf-1-area-0.0.0.1]ne 172.16.34.0 0.0.0.255
R2
[R2]ospf 1 router-id 2.2.2.2
[R2-ospf-1]a 1
[R2-ospf-1-area-0.0.0.1]ne 172.16.33.2 0.0.0.0
[R2-ospf-1-area-0.0.0.1]ne 172.16.35.0 0.0.0.255
R3
[R3]ospf 1 router-id 3.3.3.3
[R3-ospf-1]a 1
[R3-ospf-1-area-0.0.0.1]ne 172.16.33.3 0.0.0.0
[R3-ospf-1-area-0.0.0.1]ne 172.16.36.0 0.0.0.255
area2
R6
[R6]ospf 1 router-id 6.6.6.6
[R6-ospf-1-area-0.0.0.1]ne 172.16.65.1 0.0.0.0
R11
[R11]ospf 1 rou
[R11]ospf 1 router-id 11.11.11.11
[R11-ospf-1]a 1
[R11-ospf-1-area-0.0.0.1]ne 172.16.65.2 0.0.0.0
[R11-ospf-1-area-0.0.0.1]ne 172.16.65.5 0.0.0.0
[R11-ospf-1-area-0.0.0.1]ne 172.16.66.0 0.0.0.255
R12
[R12]ospf 1 rou
[R12]ospf 1 router-id 12.12.12.12
[R12-ospf-1]a 1
[R12-ospf-1-area-0.0.0.1]ne 172.16.65.6 0.0.0.0
rip
[R12]rip 1
[R12-rip-1]v 2
[R12-rip-1]undo summary
[R12-rip-1]ne 172.16.0.0
[R12]ospf 1
[R12-ospf-1]import-route rip
area3
R7
[R7]ospf 1 router-id 7.7.7.7
[R7-ospf-1-area-0.0.0.3]ne 172.16.97.1 0.0.0.0
R8
[R8]ospf 1 router-id 8.8.8.8
[R8-ospf-1]a 2
[R8-ospf-1-area-0.0.0.2]ne 172.16.97.2 0.0.0.0
[R8-ospf-1-area-0.0.0.2]ne 172.16.97.5 0.0.0.0
[R8-ospf-1-area-0.0.0.2]ne 172.16.98.0 0.0.0.255
R9
[R9]ospf 1 router-id 9.9.9.9
[R9-ospf-1-area-0.0.0.2]ne 172.16.97.6 0.0.0.0
area 4
R9
[R9-ospf-1-area-0.0.0.2]q
[R9-ospf-1]a 4
[R9-ospf-1-area-0.0.0.4]ne 172.16.129.1 0.0.0.0
[R9-ospf-1-area-0.0.0.4]ne 172.16.130.0 0.0.0.255
R10
[R10]ospf 1 router-id 10.10.10.10
[R10-ospf-1-area-0.0.0.4]ne 172.16.129.2 0.0.0.0
[R10-ospf-1-area-0.0.0.4]ne 172.16.131.0 0.0.0.255
R9
[R9-ospf-1]import-route ospf 2
[R9-ospf-2]import-route ospf 1
第三步：配置公网通
R3
[R3]ip route-static 0.0.0.0 0 34.0.0.4
[R3]ip route-static 0.0.0.0 0 45.0.0.4
[R3]ip route-static 0.0.0.0 0 46.0.0.4
[R3]ip route-static 0.0.0.0 0 47.0.0.4
搭建MGRE中心站点
[R3]int t 0/0/0
[R3-Tunnel0/0/0]ip add 172.16.6.3 24
[R3-Tunnel0/0/0]tunnel-protocol gre p2mp
[R3-Tunnel0/0/0]source Serial 4/0/0
[R3-Tunnel0/0/0]nhrp network-id 100
[R3-Tunnel0/0/0]nhrp entry multicast dynamic
分站点
R5
[R5-Tunnel0/0/0]ip add 172.16.6.5 24
[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 172.16.6.3 34.0.0.3 register
R6
[R6]int t 0/0/0
[R6-Tunnel0/0/0]ip add 172.16.6.6 24
[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 172.16.6.3 34.0.0.3 register
R7
[R7]int t 0/0/0
[R7-Tunnel0/0/0]ip add 172.16.6.7 24
[R7-Tunnel0/0/0]tunnel-protocol gre p2mp
[R7-Tunnel0/0/0]source g 0/0/0
[R7-Tunnel0/0/0]nhrp network-id 100
[R7-Tunnel0/0/0]nhrp entry 172.16.6.3 34.0.0.3 register
OSPF宣告隧道
[R3-ospf-1-area-0.0.0.0]ne 172.16.6.0 0.0.0.255
[R5-ospf-1-area-0.0.0.0]ne 172.16.6.0 0.0.0.255
[R6-ospf-1-area-0.0.0.1]ne 172.16.6.0 0.0.0.255
[R7-ospf-1-area-0.0.0.0]network 172.16.6.0 0.0.0.255
[R3-Tunnel0/0/0]ospf network-type broadcast
[R5-Tunnel0/0/0]ospf network-type broadcast
[R6-Tunnel0/0/0]ospf network-type broadcast
[R7-Tunnel0/0/0]ospf network-type broadcast
分支站点放弃选举
[R5-Tunnel0/0/0]ospf dr-priority 0
[R6-Tunnel0/0/0]ospf dr-priority 0
[R7-Tunnel0/0/0]ospf dr-priority 0
第四步：配置nat easy ip 访问R4环回
[R3]acl 2000
[R3-acl-basic-2000]rule permit source 172.16.0.0 0.0.255.255
[R3-Serial4/0/0]nat outbound 2000
[R5]acl 2000
[R5-acl-basic-2000]rule permit source 172.16.0.0 0.0.255.255
[R5]int s 4/0/0
[R5-Serial4/0/0]nat outbound 2000
[R6]acl 2000
[R6-acl-basic-2000]rule permit source 172.16.0.0 0.0.255.255
[R6-acl-basic-2000]int s 4/0/0
[R6-Serial4/0/0]nat outbound 2000
[R7]acl 2000
[R7-acl-basic-2000]rule permit source 172.16.0.0 0.0.255.255
[R7-acl-basic-2000]int g 0/0/0
[R7-GigabitEthernet0/0/0]nat outbound 2000
第五步：区域汇总
ABR汇总
[R3]ospf 1
[R3-ospf-1]a 1
[R3-ospf-1-area-0.0.0.1]abr-summary 172.16.32.0 255.255.224.0
[R6]ospf 1
[R6-ospf-1]a 2
[R6-ospf-1-area-0.0.0.2]abr-summary 172.16.64.0 255.255.224.0
[R7]ospf 1
[R7-ospf-1]a 3
[R7-ospf-1-area-0.0.0.3]abr-summary 172.16.96.0 255.255.254.0
ASBR汇总
[R12]ospf 1
[R12-ospf-1]asbr-summary 172.16.160.0 255.255.224.0
[R9]ospf 1
[R9-ospf-1]asbr-summary 172.16.128.0 255.255.224.0
第六步：配置特殊区域
[R3]ospf 1
[R3-ospf-1]a 1
[R3-ospf-1-area-0.0.0.1]stub no-summary
[R1]ospf 1
[R1-ospf-1]a 1
[R1-ospf-1-area-0.0.0.1]stub no-summary
[R2]ospf 1
[R2-ospf-1]a 1
[R2-ospf-1-area-0.0.0.1]stub no-summary
[R6]ospf 1
[R6-ospf-1]a 2
[R6-ospf-1-area-0.0.0.2]nssa no-summary
[R11]ospf 1
[R11-ospf-1]a 2
[R11-ospf-1-area-0.0.0.2]nssa no-summary
[R12]ospf 1
[R12-ospf-1]a 2
[R12-ospf-1-area-0.0.0.2]nssa no-summary
[R7]ospf 1
[R7-ospf-1]a 3
[R7-ospf-1-area-0.0.0.3]nssa no-summary
[R8]ospf 1
[R8-ospf-1]a 3
[R8-ospf-1-area-0.0.0.3]nssa no-summary
[R9]ospf 1
[R9-ospf-1]a 3
[R9-ospf-1-area-0.0.0.3]nssa no-summary
在R9给R10下发默认缺省让R10能够访问其他网段：
[R9]ospf 2
[R9-ospf-2]default-route-advertise
第七步:更改hello时间加快收敛
area 0:
[R3]int t 0/0/0
[R3-Tunnel0/0/0]ospf timer hello 5
[R5]int t 0/0/0
[R5-Tunnel0/0/0]ospf timer hello 5
[R6]int t 0/0/0
[R6-Tunnel0/0/0]ospf timer hello 5
[R7]int t 0/0/0
[R7-Tunnel0/0/0]ospf timer hello 5
area 1
[R1]int g 0/0/0
[R1-GigabitEthernet0/0/0]ospf timer hello 5
[R2]int g 0/0/0
[R2-GigabitEthernet0/0/0]ospf timer hello 5
[R3]int g 0/0/0
[R3-GigabitEthernet0/0/0]ospf timer hello 5
area 2
[R6]int g0/0/0
[R6-GigabitEthernet0/0/0]ospf timer hello 5
[R11]int g 0/0/1
[R11-GigabitEthernet0/0/1]ospf timer hello 5
[R11-GigabitEthernet0/0/1]int g 0/0/0
[R11-GigabitEthernet0/0/0]ospf timer hello 5
[R12]int g 0/0/0
[R12-GigabitEthernet0/0/0]ospf timer hello 5
area 3
[R7]int g 0/0/1
[R7-GigabitEthernet0/0/1]ospf timer hello 5
[R8]int g 0/0/0
[R8-GigabitEthernet0/0/0]ospf timer hello 5
[R8-GigabitEthernet0/0/0]int g 0/0/1
[R8-GigabitEthernet0/0/1]ospf timer hello 5
[R9]int g 0/0/0
[R9-GigabitEthernet0/0/0]ospf timer hello 5
area 4
[R9-GigabitEthernet0/0/0]int g 0/0/1
[R9-GigabitEthernet0/0/1]ospf timer hello 5
[R10]int g 0/0/0
[R10-GigabitEthernet0/0/0]ospf timer hello 5
第八步：保障更新安全
area 0
[R3]ospf 1
[R3-ospf-1]a 0
[R3-ospf-1-area-0.0.0.0]authentication-mode md5 1 cipher 123
[R5]ospf 1
[R5-ospf-1]a 0
[R5-ospf-1-area-0.0.0.0]authentication-mode md5 1 cipher 123
[R6]ospf 1
[R6-ospf-1]a 0
[R6-ospf-1-area-0.0.0.0]authentication-mode md5 1 cipher 123
[R7]ospf 1
[R7-ospf-1]a 0
[R7-ospf-1-area-0.0.0.0]authentication-mode md5 1 cipher 123
area1
[R1]ospf 1
[R1-ospf-1]a 1
[R1-ospf-1-area-0.0.0.1]authentication-mode md5 1 cipher 123
[R2-ospf-1-area-0.0.0.1]
[R2-ospf-1-area-0.0.0.1]authentication-mode md5 1 cipher 123
[R3]ospf 1
[R3-ospf-1]a 1
[R3-ospf-1-area-0.0.0.1]authentication-mode md5 1 cipher 123
area2
[R6]ospf 1
[R6-ospf-1]a 2
[R6-ospf-1-area-0.0.0.2]authentication-mode md5 1 cipher 123
[R11]ospf 1
[R11-ospf-1]a2
[R11-ospf-1-area-0.0.0.2]authentication-mode md5 1 cipher 123
[R12]ospf 1
[R12-ospf-1]a 2
[R12-ospf-1-area-0.0.0.2]authentication-mode md5 1 cipher 123
area 3
[R7]ospf 1
[R7-ospf-1]a 3
[R7-ospf-1-area-0.0.0.3]authentication-mode md5 1 cipher 123
[R8]ospf 1
[R8-ospf-1]a 3
[R8-ospf-1-area-0.0.0.3]authentication-mode md5 1 cipher 123
[R9]ospf 1
[R9-ospf-1]a 3
[R9-ospf-1-area-0.0.0.3]authentication-mode md5 1 cipher 123
area 4
[R9]ospf 1
[R9-ospf-1]a 4
[R9-ospf-1-area-0.0.0.4]authentication-mode md5 1 cipher 123
[R10]ospf 1
[R10-ospf-1]a 4
[R10-ospf-1-area-0.0.0.4]authentication-mode md5 1 cipher 123
