版权声明：本文为GJHe原创文章，未经博主允许不得转载。 https://blog.csdn.net/qq_35428201/article/details/81878971
要求
1，根据图示配置正确的ip地址
2，根据图示配置ospf协议及所属的区域，使全网互通
3，AR1上有两个环回接口，为了减少路由表规模，需要配置区域汇总
4，AR3上引入了两个环回接口地址（通过引入直连可实现）import direct
5，AR3上对引入的路由汇总
6, 区域1希望降低路由计算、存储压力 ，同时考虑网络扩展，需要保留引入外部路由的功能。
7，区域3外来人员较多，采用较安全的方式保证路由交互的安全性
实验拓扑
1 配置IP地址
AR1
<Huawei>sys
Enter system view, return user view with Ctrl+Z.
[Huawei]sys AR1
[AR1]undo info-center enable
Info: Information center is disabled.
[AR1]interface g0/0/0
[AR1-GigabitEthernet0/0/0]ip addr 1.1.1.1 24
[AR1-GigabitEthernet0/0/0]inter l 1
[AR1-LoopBack1]ip add 192.168.1.1 24
[AR1-LoopBack1]inter l 2
[AR1-LoopBack2]ip add 192.168.2AR2
<Huawei>sys
Enter system view, return user view with Ctrl+Z.
[Huawei]sys AR2
[AR2]un in en
Info: Information center is disabled.
[AR2]inte g0/0/0
[AR2-GigabitEthernet0/0/0]ip add 1.1.1.2 24
[AR2-GigabitEthernet0/0/0]inte g0/0/1
[AR2-GigabitEthernet0/0/1]ip add 2.2.2.1 24AR3
<Huawei>sys
Enter system view, return user view with Ctrl+Z.
[Huawei]sys AR3
[AR3]un in en
Info: Information center is disabled.
[AR3]inter g0/0/0
[AR3-GigabitEthernet0/0/0]ip add 2.2.2.2 24
[AR3-GigabitEthernet0/0/0]inter g0/0/1
[AR3-GigabitEthernet0/0/1]ip add 3.3.3.1 24
[AR3-GigabitEthernet0/0/1]inter l 1
[AR3-LoopBack1]ip add 172.16.1.1 24
[AR3-LoopBack1]inter l 2
[AR3-LoopBack2]ip add 172.16.2.1 24AR4
<Huawei>sys
Enter system view, return user view with Ctrl+Z.
[Huawei]sys AR4
[AR4]un in en
Info: Information center is disabled.
[AR4]inter g0/0/0
[AR4-GigabitEthernet0/0/0]ip add 3.3.3.2 24
[AR4-GigabitEthernet0/0/0]inter g0/0/1
[AR4-GigabitEthernet0/0/1]ip add 4.4.4.1 24AR5
<Huawei>sys
Enter system view, return user view with Ctrl+Z.
[Huawei]sys AR5
[AR5]un in en
Info: Information center is disabled.
[AR5]inter g0/0/0
[AR5-GigabitEthernet0/0/0]ip add 4.4.4.2 24
[AR5-GigabitEthernet0/0/0]inter g0/0/1
[AR5-GigabitEthernet0/0/1]ip add 5.5.5.1 24AR6
<Huawei>sys
Enter system view, return user view with Ctrl+Z.
[Huawei]sys AR6
[AR6]un in en
Info: Information center is disabled.
[AR6]inter g0/0/0
[AR6-GigabitEthernet0/0/0]ip add 5.5.5.2 24配置OSPF
AR1
[AR1]router id 1.1.1.1 //手动指定全局Router ID
Info: Router ID has been modified, please reset the relative protocols manually
to update the Router ID.
[AR1]ospf
[AR1-ospf-1]are 1
[AR1-ospf-1-area-0.0.0.1]net 1.1.1.0 0.0.0.255AR2
[AR2]router id 1.1.1.2
Info: Router ID has been modified, please reset the relative protocols manually
to update the Router ID.
[AR2]ospf
[AR2-ospf-1]are 1
[AR2-ospf-1-area-0.0.0.1]net 1.1.1.0 0.0.0.255
[AR2-ospf-1-area-0.0.0.1]qu
[AR2-ospf-1]area 0
[AR2-ospf-1-area-0.0.0.0]net 2.2.2.0 0.0.0.255AR3
[AR3]router id 2.2.2.2
Info: Router ID has been modified, please reset the relative protocols manually
to update the Router ID.
[AR3]ospf
[AR3-ospf-1]area 0
[AR3-ospf-1-area-0.0.0.0]net 2.2.2.0 0.0.0.255
[AR3-ospf-1-area-0.0.0.0]net 3.3.3.0 0.0.0.255AR4
[AR4]router id 3.3.3.2
Info: Router ID has been modified, please reset the relative protocols manually
to update the Router ID.
[AR4]ospf
[AR4-ospf-1]are 0
[AR4-ospf-1-area-0.0.0.0]net 3.3.3.0 0.0.0.255
[AR4-ospf-1-area-0.0.0.0]qu
[AR4-ospf-1]area 2
[AR4-ospf-1-area-0.0.0.2]net 4.4.4.0 0.0.0.255AR5
[AR5]router id 4.4.4.2
Info: Router ID has been modified, please reset the relative protocols manually
to update the Router ID.
[AR5]ospf
[AR5-ospf-1]area 2
[AR5-ospf-1-area-0.0.0.2]net 4.4.4.0 0.0.0.255
[AR5-ospf-1-area-0.0.0.2]qu
[AR5-ospf-1]area 3
[AR5-ospf-1-area-0.0.0.3]net 5.5.5.0 0.0.0.255AR6
[AR6]router id 5.5.5.2
Info: Router ID has been modified, please reset the relative protocols manually
to update the Router ID.
[AR6]ospf
[AR6-ospf-1]are 3
[AR6-ospf-1-area-0.0.0.3]net 5.5.5.0 0.0.0.2552 ABR（AR4、AR5）路由器互指对方的Router id 实现虚连接
AR4
[AR4]ospf
[AR4-ospf-1]area 2
[AR4-ospf-1-area-0.0.0.2]vlink-peer 4.4.4.2AR5
[AR5]ospf
[AR5-ospf-1]area 2
[AR5-ospf-1-area-0.0.0.2]vlink-peer 3.3.3.24 AR3上引入了两个环回接口地址（通过引入直连可实现）import direct
[AR3]ospf
[AR3-ospf-1]import-route direct 
3 AR1环回接口配置及区域汇总
[AR1]ospf
[AR1-ospf-1]area 1
[AR1-ospf-1-area-0.0.0.1]net 1.1.1.0 0.0.0.255
[AR1-ospf-1-area-0.0.0.1]network 192.168.1.0 0.0.0.255
[AR1-ospf-1-area-0.0.0.1]network 192.168.2.0 0.0.0.255AR2（ABR）
[AR2]ospf
[AR2-ospf-1]area 1
[AR2-ospf-1-area-0.0.0.1]abr-summary 192.168.0.0 255.255.252.0
area 1 配置Stub
未配置之前查看routing
display ospf routing配置Stub需要在区域内所有路由器进行配置
AR1
[AR1]ospf
[AR1-ospf-1]area 1
[AR1-ospf-1-area-0.0.0.1]stub
AR2
[AR2]ospf
[AR2-ospf-1]area 1
[AR2-ospf-1-area-0.0.0.1]stub再看routing
6 area 1 配置完全Stub
AR2
[AR2-ospf-1-area-0.0.0.1]stub no-summary 
area 1配置NSSA
[AR1]ospf
[AR1-ospf-1]area 1
[AR1-ospf-1-area-0.0.0.1]nssa [AR2]ospf
[AR2-ospf-1]area 1
[AR2-ospf-1-area-0.0.0.1]nssa 
5 AR3上对引入的路由汇总
[AR3-ospf-1]asbr-summary 172.16.0.0 255.255.252.07 area 3配置认证
[AR5]ospf
[AR5-ospf-1]area 3
[AR5-ospf-1-area-0.0.0.3]authentication-mode hmac-md5 88 1234[AR6]ospf
[AR6-ospf-1]are 3
[AR6-ospf-1-area-0.0.0.3]authentication-mode hmac-md5 88 1234