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OSPF接口网络类型实验

一，实验拓扑

初始拓扑：

最终拓扑：

二，实验要求及分析

要求：

1，R6为ISP只能配置IP地址，R1-R5的环回为私有网段
2，R1/R4/R5为全连的MGRE结构，R1/R2/R3为星型的拓扑结构，R1为中心站点
3，所有私有网段可以相互通讯，私有网段使用OSPF完成。

分析：

IP设置

环回接口网段：
192.168.1.0/24 -----> r1的环回192.168.1.1/24 ----> r1的环回接口地址
192.168.2.0/24 -----> r2的环回192.168.2.1/24 ----> r2的环回接口地址
192.168.3.0/24 -----> r3的环回192.168.3.1/24 ----> r3的环回接口地址
192.168.4.0/24 -----> r4的环回192.168.4.1/24 ----> r4的环回接口地址
192.168.5.0/24 -----> r5的环回192.168.5.1/24 ----> r5的环回接口地址
设备直连网段：
16.0.0.0/24 -----> r1到r6（上）
61.0.0.0/24 -----> r1到r6（下）
26.0.0.0/24 -----> r2到r6
36.0.0.0/24 -----> r3到r6
46.0.0.0/24 -----> r4到r6
56.0.0.0/24 -----> r5到r6
虚拟隧道网段：
1，R1/R4/R5为全连的MGRE结构网段：t0/0/0192.168.6.0/24192.168.6.1/24 ---> r1隧道0口地址192.168.6.2/24 ---> r4隧道0口地址192.168.6.3/24 ---> r5隧道0口地址
2，R1/R2/R3为星型的拓扑结构网段：t0/0/1192.168.7.0/24192.168.7.1/24 ---> r1隧道1口地址192.168.7.2/24 ---> r2隧道1口地址192.168.7.3/24 ---> r3隧道1口地址

三，实验配置

1，基础IP配置

R1

[r1]int g 0/0/0
[r1-GigabitEthernet0/0/0]ip add 16.0.0.1 24
[r1-GigabitEthernet0/0/0]int g 0/0/1
[r1-GigabitEthernet0/0/1]ip add 61.0.0.1 24
[r1-GigabitEthernet0/0/1]int l 0
[r1-LoopBack0]ip add 192.168.1.1 24

R2

[r2]int g 0/0/0
[r2-GigabitEthernet0/0/0]ip add 26.0.0.1 24
[r2-GigabitEthernet0/0/0]int l 0
[r2-LoopBack0]ip add 192.168.2.1 24

R3

[r3]int g 0/0/0
[r3-GigabitEthernet0/0/0]ip add 36.0.0.1 24
[r3-GigabitEthernet0/0/0]
[r3-GigabitEthernet0/0/0]int l 0
[r3-LoopBack0]ip add 192.168.3.1 24

R4

[r4]int g 0/0/0
[r4-GigabitEthernet0/0/0]ip add 46.0.0.1 24
[r4-GigabitEthernet0/0/0]int l 0 
[r4-LoopBack0]ip add 192.168.4.1 24

R5

[r5]int g 0/0/0
[r5-GigabitEthernet0/0/0]ip add 56.0.0.1 24
[r5-GigabitEthernet0/0/0]int l 0
[r5-LoopBack0]ip add 192.168.5.1 24

R6：因为R6是ISP设备，所以只需用配置各个接口的IP地址即可。

[isp]int g 0/0/0
[isp-GigabitEthernet0/0/0]ip add 16.0.0.2 24
[isp-GigabitEthernet0/0/0]int g 0/0/1
[isp-GigabitEthernet0/0/1]ip add 61.0.0.2 24
[isp-GigabitEthernet0/0/1]int g 0/0/2
[isp-GigabitEthernet0/0/2]ip add 56.0.0.2 24
[isp-GigabitEthernet0/0/2]int g 1/0/0
[isp-GigabitEthernet1/0/0]ip add 26.0.0.2 24
[isp-GigabitEthernet1/0/0]int g 2/0/0
[isp-GigabitEthernet2/0/0]ip add 36.0.0.2 24
[isp-GigabitEthernet2/0/0]int g 3/0/0
[isp-GigabitEthernet3/0/0]ip add 46.0.0.2 24 

2，路由配置

保证公网互通。

[r1]ip route-static 0.0.0.0 0 16.0.0.2
[r1]ip route-static 0.0.0.0 0 61.0.0.2
[r2]ip route-static 0.0.0.0 0 26.0.0.2
[r3]ip route-static 0.0.0.0 0 36.0.0.2
[r4]ip route-static 0.0.0.0 0 46.0.0.2
[r5]ip route-static 0.0.0.0 0 56.0.0.2

3，MGRE结构配置

R1

[r1]interface Tunnel 0/0/0
[r1-Tunnel0/0/0]ip add 192.168.6.1 24	
[r1-Tunnel0/0/0]tunnel-protocol gre p2mp 
[r1-Tunnel0/0/0]source 16.0.0.1
[r1-Tunnel0/0/0]nhrp entry 192.168.6.2 46.0.0.1 register 
[r1-Tunnel0/0/0]nhrp entry 192.168.6.3 56.0.0.1 register
[r1-Tunnel0/0/0]nhrp network-id 101  ---创建nhrp域

R4

[r4]int t 0/0/0
[r4-Tunnel0/0/0]ip add 192.168.6.2 24
[r4-Tunnel0/0/0]tunnel-protocol gre p2mp 
[r4-Tunnel0/0/0]source 46.0.0.1
[r4-Tunnel0/0/0]nhrp entry 192.168.6.3 56.0.0.1 register 
[r4-Tunnel0/0/0]nhrp entry multicast dynamic 
[r4-Tunnel0/0/0]nhrp network-id 101

R5

[r5]int t 0/0/0
[r5-Tunnel0/0/0]ip add 192.168.6.3 24
[r5-Tunnel0/0/0]tunnel-protocol gre p2mp
[r5-Tunnel0/0/0]source 56.0.0.1
[r5-Tunnel0/0/0]nhrp entry multicast dynamic 
[r5-Tunnel0/0/0]nhrp network-id 101

4，星型拓扑配置

R1–中心

[r1]int t 0/0/1
[r1-Tunnel0/0/1]ip add 192.168.7.1 24	
[r1-Tunnel0/0/1]tunnel-protocol gre p2mp 
[r1-Tunnel0/0/1]source 61.0.0.1	
[r1-Tunnel0/0/1]nhrp entry multicast dynamic 
[r1-Tunnel0/0/1]nhrp network-id 100

R2–分支节点1

[r2]int t 0/0/1
[r2-Tunnel0/0/1]ip add 192.168.7.2 24
[r2-Tunnel0/0/1]tunnel-protocol gre p2mp 
[r2-Tunnel0/0/1]source GigabitEthernet 0/0/0
[r2-Tunnel0/0/1]nhrp entry 192.168.7.1 61.0.0.1 register 
[r2-Tunnel0/0/1]nhrp network-id 100

R3–分直节点2

[r3]int t 0/0/1
[r3-Tunnel0/0/1]ip add 192.168.7.3 24
[r3-Tunnel0/0/1]tunnel-protocol gre p2mp 	
[r3-Tunnel0/0/1]source GigabitEthernet 0/0/0
[r3-Tunnel0/0/1]nhrp entry 192.168.7.1 61.0.0.1 register 	
[r3-Tunnel0/0/1]nhrp network-id 100

补充路由配置

[r1]ip route-static 192.168.2.0 24 192.168.7.2
[r1]ip route-static 192.168.3.0 24 192.168.7.3[r2]ip route-static 192.168.1.0 24 192.168.7.1
[r2]ip route-static 192.168.3.0 24 192.168.7.1[r3]ip route-static 192.168.1.0 24 192.168.7.1
[r3]ip route-static 192.168.2.0 24 192.168.7.1

5，OSPF配置

开启OSPF路由，R1为DR，R2、R3放弃选举，修改ospf接口类型为broadcast。

[r1]ospf 1 router-id 1.1.1.1
[r1-ospf-1]area 0
[r1-ospf-1-area-0.0.0.0]network 192.168.1.1 0.0.0.0
[r1-ospf-1-area-0.0.0.0]network 192.168.6.1 0.0.0.0
[r1-ospf-1-area-0.0.0.0]network 192.168.7.1 0.0.0.0[r2]ospf 1 router-id 2.2.2.2
[r2-ospf-1]area 0
[r2-ospf-1-area-0.0.0.0]network 192.168.2.1 0.0.0.0
[r2-ospf-1-area-0.0.0.0]network 192.168.7.2 0.0.0.0[r3]ospf 1 router-id 3.3.3.3
[r3-ospf-1]area 0
[r3-ospf-1-area-0.0.0.0]network 192.168.3.1 0.0.0.0
[r3-ospf-1-area-0.0.0.0]network 192.168.7.3 0.0.0.0[r4]ospf 1 router-id 4.4.4.4
[r4-ospf-1]area  0
[r4-ospf-1-area-0.0.0.0]network 192.168.4.1 0.0.0.0
[r4-ospf-1-area-0.0.0.0]network 192.168.6.2 0.0.0.0[r5]ospf 1 router-id 5.5.5.5
[r5-ospf-1]area 0
[r5-ospf-1-area-0.0.0.0]network 192.168.5.1 0.0.0.0
[r5-ospf-1-area-0.0.0.0]network 192.168.6.3 0.0.0.0

修改ospf接口类型为broadcast：

[r1-Tunnel0/0/1]ospf network-type broadcast
[r2-Tunnel0/0/1]ospf network-type broadcast
[r3-Tunnel0/0/1]ospf network-type broadcast
[r4-Tunnel0/0/0]ospf network-type broadcast
[r5-Tunnel0/0/0]ospf network-type broadcast

R2，R3放弃选举：

[r2-Tunnel0/0/1]ospf dr-priority 0
[r3-Tunnel0/0/1]ospf dr-priority 0

查看邻居表：（命令：display ospf peer brief ）

r1：OSPF Process 1 with Router ID 1.1.1.1Peer Statistic Information----------------------------------------------------------------------------Area Id          Interface                        Neighbor id      State    0.0.0.0          Tunnel0/0/0                      4.4.4.4          Full        0.0.0.0          Tunnel0/0/1                      2.2.2.2          Full        0.0.0.0          Tunnel0/0/1                      3.3.3.3          Full        ----------------------------------------------------------------------------
r2：OSPF Process 1 with Router ID 2.2.2.2Peer Statistic Information----------------------------------------------------------------------------Area Id          Interface                        Neighbor id      State    0.0.0.0          Tunnel0/0/1                      1.1.1.1          Full        ----------------------------------------------------------------------------
r3：OSPF Process 1 with Router ID 3.3.3.3Peer Statistic Information----------------------------------------------------------------------------Area Id          Interface                        Neighbor id      State    0.0.0.0          Tunnel0/0/1                      1.1.1.1          Full        ----------------------------------------------------------------------------
r4：OSPF Process 1 with Router ID 4.4.4.4Peer Statistic Information----------------------------------------------------------------------------Area Id          Interface                        Neighbor id      State    0.0.0.0          Tunnel0/0/0                      1.1.1.1          Full        0.0.0.0          Tunnel0/0/0                      5.5.5.5          Full        ----------------------------------------------------------------------------
r5：OSPF Process 1 with Router ID 5.5.5.5Peer Statistic Information----------------------------------------------------------------------------Area Id          Interface                        Neighbor id      State    0.0.0.0          Tunnel0/0/0                      1.1.1.1          Init        0.0.0.0          Tunnel0/0/0                      4.4.4.4          Full        ----------------------------------------------------------------------------

查看静态路由协议的路由表条目：（命令：display ip routing-table protocol static ）

R1

R2

R3

R4

R5

四，测试