ospf综合实验

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；

实验思路：

1.划分IP地址

2.配置IP地址

3.配置内网通和公网通，搭建MGRE环境

4.配置nat easy ip能够访问R4的环回

5.ABR/ASBR汇总

6.设特殊区域

7.更改hello时间加快收敛

8.配置认证保证安全

实验步骤：

1.基于172.16.0.0/16划分网段

2.配置ip地址

[R1]int g0/0/0
[R1-GigabitEthernet0/0/0]ip add 172.16.33.1 24 
[R1-GigabitEthernet0/0/0]int l0
[R1-LoopBack0]ip add 172.16.34.1 24

[R2]int g 0/0/0
[R2-GigabitEthernet0/0/0]ip add 172.16.33.2 24
[R2-GigabitEthernet0/0/0]int l0
[R2-LoopBack0]ip add 172.16.35.2 24

[R3]int g0/0/0
[R3-GigabitEthernet0/0/0]ip add 172.16.33.3 24
[R3-GigabitEthernet0/0/0]int s 4/0/0
[R3-Serial4/0/0]ip add 34.0.0.3 24
[R3-Serial4/0/0]int l0
[R3-LoopBack0]ip add 172.16.36.3 24

[R4]int s 3/0/0
[R4-Serial3/0/0]ip add 34.0.0.4 24
[R4-Serial3/0/0]int s 3/0/1
[R4-Serial3/0/1]ip add 45.0.0.4 24
[R4-Serial3/0/1]int s 4/0/0
[R4-Serial4/0/0]ip add 46.0.0.4 24
[R4-Serial4/0/0]int g 0/0/0
[R4-GigabitEthernet0/0/0]ip add 47.0.0.4 24
[R4-GigabitEthernet0/0/0]int l0
[R4-LoopBack0]ip add 172.16.2.4 24

[R5]int s 4/0/0
[R5-Serial4/0/0]ip add 45.0.0.5 24
[R5-Serial4/0/0]int l0
[R5-LoopBack0]ip add 172.16.3.5 24

[R6-Serial4/0/0]ip add 46.0.0.6 24
[R6-Serial4/0/0]int g 0/0/0
[R6-GigabitEthernet0/0/0]ip add 172.16.65.1 30
[R6-GigabitEthernet0/0/0]int l0
[R6-LoopBack0]ip add 172.16.4.6 24

[R7]int g 0/0/0
[R7-GigabitEthernet0/0/0]ip add 47.0.0.7 24
[R7-GigabitEthernet0/0/0]int g 0/0/1
[R7-GigabitEthernet0/0/1]ip add 172.16.97.1 30
[R7-GigabitEthernet0/0/1]int l0
[R7-LoopBack0]ip add 172.16.5.7 24

[R8]int g0/0/0
[R8-GigabitEthernet0/0/0]ip add 172.16.97.2 30 
[R8-GigabitEthernet0/0/0]int g0/0/1
[R8-GigabitEthernet0/0/1]ip add 172.16.97.5 30
[R8-GigabitEthernet0/0/1]int l0
[R8-LoopBack0]ip add 172.16.98.8 24

[R9]int g0/0/0
[R9-GigabitEthernet0/0/0]ip add 172.16.97.6 30
[R9-GigabitEthernet0/0/0]int g0/0/1
[R9-GigabitEthernet0/0/1]ip add 172.16.129.1 30
[R9-GigabitEthernet0/0/1]int l0
[R9-LoopBack0]ip add 172.16.130.9 24

[R10]int g0/0/0
[R10-GigabitEthernet0/0/0]ip add 172.16.129.2 30
[R10-GigabitEthernet0/0/0]int l0
[R10-LoopBack0]ip add 172.16.131.10 24

[R11]int g 0/0/0
[R11-GigabitEthernet0/0/0]ip add 172.16.65.2 30
[R11-GigabitEthernet0/0/0]int g0/0/1
[R11-GigabitEthernet0/0/1]ip add 172.16.65.5 30
[R11-GigabitEthernet0/0/1]int l0
[R11-LoopBack0]ip add 172.16.66.11 24

[R12]int g0/0/0
[R12-GigabitEthernet0/0/0]ip add 172.16.65.6 30
[R12-GigabitEthernet0/0/0]int l0
[R12-LoopBack0]ip add 172.16.160.12 24
[R12-LoopBack0]int l1
[R12-LoopBack1]ip add 172.16.161.12 24

3.配置内网通和公网通

1.分区域配置私网通

area 0:

[R5]ospf 1 router-id 5.5.5.5
[R5-ospf-1]a 0
[R5-ospf-1-area-0.0.0.0]ne 172.16.3.0 0.0.0.255

[R6]ospf 1 router-id 6.6.6.6
[R6-ospf-1]a 0
[R6-ospf-1-area-0.0.0.0]ne 172.16.4.0 0.0.0.255

[R7]ospf 1 router-id 7.7.7.7
[R7-ospf-1]a 0
[R7-ospf-1-area-0.0.0.0]ne 172.16.5.0 0.0.0.255

area 1:

[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]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]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

area 2:

[R6-ospf-1]a 2
[R6-ospf-1-area-0.0.0.2]ne 172.16.65.1 0.0.0.0

[R11]ospf 1 router-id 11.11.11.11
[R11-ospf-1]a 2
[R11-ospf-1-area-0.0.0.2]ne 172.16.65.2 0.0.0.0
[R11-ospf-1-area-0.0.0.2]ne 172.16.65.5 0.0.0.0
[R11-ospf-1-area-0.0.0.2]ne 172.16.66.0 0.0.0.255

[R12]ospf 1 router-id 12.12.12.12
[R12-ospf-1]a 2
[R12-ospf-1-area-0.0.0.2]ne 172.16.65.6 0.0.0.0
配置R12上的RIP
[R12]rip 1
[R12-rip-1]v 2
[R12-rip-1]undo summary 
[R12-rip-1]ne 172.16.0.0
进入ospf进程下引入rip
[R12]ospf 1
[R12-ospf-1]import-route rip

area 3：

[R7]ospf 1 router-id 7.7.7.7
[R7-ospf-1]a 3
[R7-ospf-1-area-0.0.0.3]ne 172.16.97.1 0.0.0.0

[R8]ospf 1 router-id 8.8.8.8
[R8-ospf-1]a 3
[R8-ospf-1-area-0.0.0.3]ne 172.16.97.2 0.0.0.0
[R8-ospf-1-area-0.0.0.3]ne 172.16.97.5 0.0.0.0
[R8-ospf-1-area-0.0.0.3]ne 172.16.98.0 0.0.0.255

[R9]ospf 1 router-id 9.9.9.9
[R9-ospf-1]a 3
[R9-ospf-1-area-0.0.0.3]ne 172.16.97.6 0.0.0.0

area 4：（对于不规则区域，使用多进程双向重发布）

[R9]ospf 2
[R9-ospf-2]a 4
[R9-ospf-2-area-0.0.0.4]ne 172.16.129.1 0.0.0.0
[R9-ospf-2-area-0.0.0.4]ne 172.16.130.0 0.0.0.255

[R10]ospf 2 router-id 10.10.10.10
[R10-ospf-2]a 4
[R10-ospf-2-area-0.0.0.4]ne 172.16.129.2 0.0.0.0
[R10-ospf-2-area-0.0.0.4]ne 172.16.131.0 0.0.0.255

进入R9在ospf1、2进程下引入另一个进程
[R9]ospf 1
[R9-ospf-1]import-route ospf 2
[R9-ospf-1]q
[R9]ospf 2
[R9-ospf-2]import-route ospf 1

2.配置公网通，搭建MGRE环境

公网缺省配置：

[R3]ip route-static 0.0.0.0 0 34.0.0.4
[R5]ip route-static 0.0.0.0 0 45.0.0.4
[R6]ip route-static 0.0.0.0 0 46.0.0.4
[R7]ip route-static 0.0.0.0 0 47.0.0.4

搭建MGRE环境——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]int t 0/0/0
[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]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]int t0/0/0
[R7-Tunnel0/0/0]ip add 172.16.6.7 24
[R7-Tunnel0/0/0]tunnel-protocol gre p2mp
[R7-Tunnel0/0/0]source g0/0/0
[R7-Tunnel0/0/0]nhrp network-id 100
[R7-Tunnel0/0/0]nhrp entry 172.16.6.3 34.0.0.3 register

在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-0.0.0.0]ne 172.16.6.0 0.0.0.255
[R7-ospf-1-area-0.0.0.0]ne 172.16.6.0 0.0.0.255

修改隧道类型：

[R3]int t0/0/0
[R3-Tunnel0/0/0]ospf network-type broadcast 

[R5]int t0/0/0
[R5-Tunnel0/0/0]ospf network-type broadcast

[R6]int t0/0/0
[R6-Tunnel0/0/0]ospf network-type broadcast

[R7]int t0/0/0
[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

检查路由表（R3）：

ping通测试（R1pingR10的环回和RIP网段）：

4.配置nat easy ip能够访问R4的环回

[R3]acl 2000
[R3-acl-basic-2000]rule permit source 172.16.0.0 0.0.255.255
[R3]int s 4/0/0
[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]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]int g0/0/0
[R7-GigabitEthernet0/0/0]nat outbound 2000

（这里需要下发一条默认缺省让其他路由器能够访问公网口----在配置特殊区域后会自动下发默认缺省）

5.区域汇总

ABR汇总：

area 1
[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

area 2
[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

area 3
[R7]ospf 1
[R7-ospf-1]a 3
[R7-ospf-1-area-0.0.0.3]abr-summary 172.16.96.0 255.255.224.0

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

汇总后的路由表：

lsdb表：

6.配置特殊区域

area 1 ----- totally stub

[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

设置后的路由表和lsdb表：

area 2 ----- totally nssa

[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

area 3 ----- totally nssa

[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

其他路由通过缺省路由访问，R10无法学习到其他的路由

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

这里因为下发缺省后，easy ip的问题也能够解决了，ping通测试：

7.更改hello时间加快收敛

area 0：

[R3]int t0/0/0
[R3-Tunnel0/0/0]ospf timer hello 5

[R5]int t0/0/0
[R5-Tunnel0/0/0]ospf timer hello 5

[R6]int t0/0/0
[R6-Tunnel0/0/0]ospf timer hello 5

[R7]int t0/0/0
[R7-Tunnel0/0/0]ospf timer hello 5

area 1：

[R1]int g0/0/0
[R1-GigabitEthernet0/0/0]ospf timer hello 5

[R2]int g0/0/0
[R3-GigabitEthernet0/0/0]ospf timer hello 5

[R3]int g0/0/0
[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 g0/0/0
[R11-GigabitEthernet0/0/0]ospf timer hello 5
[R11]int g0/0/1
[R11-GigabitEthernet0/0/1]ospf timer hello 5

[R12]int g0/0/0
[R12-GigabitEthernet0/0/0]ospf timer hello 5

area 3：

[R7]int g0/0/1
[R7-GigabitEthernet0/0/1]ospf timer hello 5

[R8]int g0/0/0
[R8-GigabitEthernet0/0/0]ospf timer hello 5
[R8]int g0/0/1
[R8-GigabitEthernet0/0/1]ospf timer hello 5

[R9]int g0/0/0
[R9-GigabitEthernet0/0/0]ospf timer hello 5

area 4：

[R9]int g0/0/1
[R9-GigabitEthernet0/0/1]ospf timer hello 5

[R10]int g0/0/0
[R10-GigabitEthernet0/0/0]ospf timer hello 5

8.配置认证保证安全

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

[R7]ospf 1
[R7-ospf-1]a 0
[R7-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

area 1：

[R3]ospf 1
[R3-ospf-1]a 1
[R3-ospf-1-area-0.0.0.1]authentication-mode md5 1 cipher 123

[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
[R2-ospf-1]a 1
[R2-ospf-1-area-0.0.0.1]authentication-mode md5 1 cipher 123

area 2：

[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]a 2
[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 2
[R9-ospf-2]a 4
[R9-ospf-2-area-0.0.0.4]authentication-mode md5 1 cipher 123

[R10]ospf 2
[R10-ospf-2]a 4
[R10-ospf-2-area-0.0.0.4]authentication-mode md5 1 cipher 123