实验要求
1.首先针对实验要求做基本配置
[r1]interface g0/0/0
[r1-GigabitEthernet0/0/0]ip address 192.168.5.1 24
[r1]interface LoopBack 0
[r1-LoopBack0]ip address 192.168.1.0 32[r2]interface g0/0/1
[r2-GigabitEthernet0/0/1]ip address 192.168.5.2 24
[r2-GigabitEthernet0/0/0]ip address 23.0.0.1 24
[r2-GigabitEthernet0/0/2]ip address 192.168.7.2 24
[r2-LoopBack0]ip address 2.2.2.2 32[r3]interface g0/0/0
[r3-GigabitEthernet0/0/0]ip address 34.0.0.1 24
[r3-GigabitEthernet0/0/1]ip address 23.0.0.2 24
[r3-LoopBack0]ip address 3.3.3.3 32[r4]interface g0/0/1
[r4-GigabitEthernet0/0/1]ip address 34.0.0.2 24
[r4-GigabitEthernet0/0/0]ip address 192.168.6.1 24
[r4-GigabitEthernet0/0/2]ip address 192.168.8.1 24
[r4-LoopBack0]ip address 4.4.4.4 32[r5]interface g0/0/0
[r5-GigabitEthernet0/0/0]ip address 192.168.6.2 24
[r5-LoopBack0]ip address 192.168.2.0 32[r6]int g0/0/0
[r6-GigabitEthernet0/0/0]ip address 192.168.7.1 24
[r6-LoopBack0]ip address 192.168.3.0 32
[r7-GigabitEthernet0/0/0]ip address 192.168.8.2 24
[r7-LoopBack0]ip address 192.168.4.0 32
2.开启isp之间的ospf协议
[r2]ospf 100 router-id 2.2.2.2
[r2-ospf-100]area 0
[r2-ospf-100-area-0.0.0.0]network 23.0.0.0 0.0.0.255
[r2-ospf-100-area-0.0.0.0]network 2.2.2.2 0.0.0.0[r3]ospf 100 router-id 3.3.3.3
[r3-ospf-100]area 0
[r3-ospf-100-area-0.0.0.0]network 23.0.0.0 0.0.0.255
[r3-ospf-100-area-0.0.0.0]network 34.0.0.0 0.0.0.255
[r3-ospf-100-area-0.0.0.0]network 3.3.3.3 0.0.0.0[r4]ospf 100 router-id 4.4