环路实验
1.环境准备
AR1
<Huawei>sys
[Huawei]user-interface console 0
[Huawei-ui-console0]authentication-mode aaa
[Huawei-aaa]local-user zhao password cipher 123456
[Huawei-aaa]local-user zhao privilege level 3
[Huawei-aaa]quit
[Huawei]interface GigabitEthernet 0/0/0
[Huawei-GigabitEthernet0/0/0]ip address 10.0.0.1 24
[Huawei-GigabitEthernet0/0/0]quit
[Huawei]interface GigabitEthernet 0/0/1
[Huawei-GigabitEthernet0/0/1]ip address 20.0.0.1 24
[Huawei-GigabitEthernet0/0/1]quit
[Huawei]ip route-static 0.0.0.0 0 20.0.0.2
[Huawei]return
<Huawei>save
AR2
<Huawei>
<Huawei>sys
[Huawei]user-interface console 0
[Huawei-ui-console0]authentication-mode aaa
[Huawei-ui-console0]aaa
[Huawei-aaa]local-user zhao password cipher 123456
[Huawei-aaa]local-user zhao privilege level 3
[Huawei-aaa]quit
[Huawei]interface GigabitEthernet 0/0/0
[Huawei-GigabitEthernet0/0/0]ip address 20.0.0.2 24
[Huawei-GigabitEthernet0/0/0]quit
[Huawei]interface GigabitEthernet 0/0/1
[Huawei-GigabitEthernet0/0/1]ip address 30.0.0.1 24
[Huawei-GigabitEthernet0/0/1]quit
[Huawei]ip route-static 0.0.0.0 0 20.0.0.1
[Huawei]return
<Huawei>save
2.测试
直接ping主机
ping 40.0.0.10(不存在)，抓包
形成环路
耗尽TTL
