-------------------R2配置，属于AREA1区域，----------------------
Router>en
Router#config
Configuring from terminal, memory, or network [terminal]?
Enter configuration commands, one per line.   End with CNTL/Z.
Router(config)#ho R2
R2(config)#no ip domain-lo
R2(config)#line   c 0
R2(config-line)#exec-t 0 0
R2(config-line)#logg syn
R2(config-line)#exit
R2(config)#int ser0
R2(config-if)#ip add 10.0.0.2 255.255.255.252
R2(config-if)#clock rate 56000
R2(config-if)#no shut
R2(config-if)#exit
R2(config)#int ser1
R2(config-if)#ip add 10.0.0.5 255.255.255.252
R2(config-if)#clock rate 56000
R2(config-if)#no shut
R2(config-if)#exit
R2(config)#
R2(config)#int e0
R2(config-if)#ip add 10.1.1.2 255.255.255.252
R2(config-if)#no shut
R2(config-if)#exit
R2(config)#

R2(config)#router ospf 100
R2(config-router)#net 10.0.0.0 0.0.0.3 area 0
R2(config-router)#net 10.1.1.0 0.0.0.3 area 0
R3(config-router)#net 10.0.0.4 0.0.0.3 area 2(这里的S1与E0属于区域0，即在ABR上)
R3(config-router)#net 192.168.0.0 0.0.0.255 area 2
R3(config-router)#net 192.168.1.0 0.0.0.255 area 2
R3(config-router)#net 192.168.2.0 0.0.0.255 area 2
R3(config-router)#net 192.168.3.0 0.0.0.255 area 2
R3(config-router)#net 192.168.4.0 0.0.0.255 area 2
R3(config-router)#area 2 range 192.168.0.0 255.255.252.0(汇总模拟环回接口地址)
R2(config-router)#area 2 stub no-summary
R2(config-router)#area 0 authentication message-digest
R2(config-router)#area 2 authentication message-digest
R2(config-router)#exit
R2(config)#int ser1
R2(config-if)#ip ospf message-digest-key 1 md5 huawei
R2(config-if)#no shut
R2(config-if)#exit
R2(config)#
R2#
R2(config)#int ser0
R2(config-if)#ip ospf message-digest-key 1 md5 cisco
R2(config-if)#no shut
R2(config-if)#exit
R2(config)#