1.拓扑图：
2、配置：
AR1:
ospf 10
area 0.0.0.1
network 1.1.1.1 0.0.0.0 network 10.1.1.0 0.0.0.3
AR2:
ospf 10
area 0.0.0.0
network 2.2.2.2 0.0.0.0 network 192.2.2.0 0.0.0.3 area 0.0.0.1
network 10.1.1.0 0.0.0.3
AR3:
ospf 10
area 0.0.0.0
network 192.2.2.0 0.0.0.3
network 3.3.3.3 0.0.0.0
area 0.0.0.2
network 10.2.2.0 0.0.0.3
AR4:
ospf 10
area 0.0.0.2
network 10.2.2.0 0.0.0.3
network 4.4.4.4 0.0.0.0
3.查看命令：
3.1 :display ip routing-table 查看路由表
3.2 display ip routing-table protocol ospf 查看路由表只运行OSPF
3.3 display IP routing-table protocol direct 查看路由关于直连
3.4 display ospf lsdb 查看OSPF数据库 3.5 display ospf routing 查看OSPF路由表 3.6 display ospf brief 查看OPSF总结信息 3. 7 display ospf peer 看对端的领接信息
