conf t
int f0/0
ip ospf priority 2 /改接口的优先级用来改变DR或者BDR
exit
clear ip ospf process? yes /改完接口的优先级必须要清理ospf的进程 必须要做的
R1
conf t
int lo 0 /router ID，环回接口
ip add 1.1.1.1 255.255.255.255
exit
int f0/1
ip add 172.16.20.1 255.255.255.0
exit
router ospf 100
network 1.1.1.1 0.0.0.0 area 0 /router ID，反掩码，区域
network 172.16.20.1 0.0.0.0 area 0
end
write
R2
conf t
int lo 0
ip add 2.2.2.2 255.255.255.255
exit
int f0/0
ip add 172.16.20.2 255.255.255.0
exit
int f0/1
ip add 172.16.30.1 255.255.255.0
exit
router ospf 100
network 2.2.2.2 0.0.0.0 areao
network 172.16.20.2 0.0.0.0 area 0
network 172.16.30.1 0.0.0.0 area 1
end
write
R3
conf t
int lo 0
ip add 3.3.3.3 255.255.255.255
exit
int f0/0
ip add 172.16.30.2
exit
router ospf 101
network 3.3.3.3 0.0.0.0 area 1
network 172.16.30.2 0.0.0.0 area 1
end
write
验证：R1 ping通3.3.3.3，也可以ping通172.16.30.2思科ospf实验-适合初学者
原文：http://blog.51cto.com/tudoubowen10/2065972
