ospf 末节区域和完全末节区域
ospf
末节区域和完全末节区域
一、
实验目的：
学习掌握
LSA
数据包的类型工作原理，掌握末节区域、完全末节区域、标准区域的区别、原理和使用方法。进一步了解
ospf
的工作原理！
二、
拓扑结构图：
三、
实验步骤：
1.
基本配置
测试：
sanjose3 ping 192.168.1.1
通
ping 192.168.208.2
通
结论：物理线路连接没有问题
2.
ospf
的配置
测试：
capetown(config-router)#do sh ip route
192.168.208.0/30 is subnetted, 1 subnets
C 192.168.208.0 is directly connected, Serial0/0
192.168.64.0/32 is subnetted, 1 subnets
O IA 192.168.64.1 [110/66] via 192.168.208.1, 00:00:15, Serial0/0
C 192.168.216.0/24 is directly connected, FastEthernet1/0
192.168.80.0/32 is subnetted, 1 subnets
O IA 192.168.80.1 [110/66] via 192.168.208.1, 00:00:15, Serial0/0
192.168.96.0/32 is subnetted, 1 subnets
O IA 192.168.96.1 [110/66] via 192.168.208.1, 00:00:15, Serial0/0
192.168.112.0/32 is subnetted, 1 subnets
O IA 192.168.112.1 [110/66] via 192.168.208.1, 00:00:15, Serial0/0
C 192.168.220.0/24 is directly connected, Loopback0
O IA 192.168.1.0/24 [110/65] via 192.168.208.1, 00:00:15, Serial0/0
3.
创建
ASBR
配置过程：
sanjose1(config)#int lo 5
sanjose1(config-if)#ip add 10.0.0.6 255.255.255.255
sanjose1(config-if)#no shut
sanjose1(config)#ip route 10.0.0.0 255.0.0.0 null0
sanjose1(config)#roueter ospf 1
sanjose1(config-router)#redistribute static
测试：
capetown#sh ip route
O E2 10.0.0.0/8 [110/20] via 192.168.208.1, 00:00:03, Serial0/0
4.
配置末节区域
配置过程：
sanjose3(config)#router ospf 1
sanjose3(config-router)#area 2 stub
capetown(config)#router ospf 1
capetown(config-router)#area 2 stub
测试效果：
a
）
capetown#sh ip ospf
Area 2
Number of interfaces in this area is 3 (1 loopback)
It is a stub area
b
）
capetown#sh ip route
192.168.208.0/30 is subnetted, 1 subnets
C 192.168.208.0 is directly connected, Serial0/0
192.168.64.0/32 is subnetted, 1 subnets
O IA 192.168.64.1 [110/66] via 192.168.208.1, 00:03:23, Serial0/0
C 192.168.216.0/24 is directly connected, FastEthernet1/0
192.168.80.0/32 is subnetted, 1 subnets
O IA 192.168.80.1 [110/66] via 192.168.208.1, 00:03:23, Serial0/0
192.168.96.0/32 is subnetted, 1 subnets
O IA 192.168.96.1 [110/66] via 192.168.208.1, 00:03:23, Serial0/0
192.168.112.0/32 is subnetted, 1 subnets
O IA 192.168.112.1 [110/66] via 192.168.208.1, 00:03:23, Serial0/0
C 192.168.220.0/24 is directly connected, Loopback0
O IA 192.168.1.0/24 [110/65] via 192.168.208.1, 00:03:23, Serial0/0
192.168.3.0/32 is subnetted, 1 subnets
O IA 192.168.3.1 [110/65] via 192.168.208.1, 00:03:29, Serial0/0
O*I A 0.0.0.0/0 [110/65] via 192.168.208.1, 00:03:29, Serial0/0
c
）分析：有数条区域间的路由，增大路由负载，在
capatown
中只需要一条到达
ABR
的路由就可以，可自动汇总。
5.
配置完全末节区域
a
）配置过程
sanjose3(config)#router ospf 1
sanjose3(config-router)#area 2 stub no-summary
capetown(config)#router ospf 1
capetown(config-router)#area 2 stub no-summary
b
）结论：
capetown#sho ip route
192.168.208.0/30 is subnetted, 1 subnets
C 192.168.208.0 is directly connected, Serial0/0
C 192.168.216.0/24 is directly connected, FastEthernet1/0
C 192.168.220.0/24 is directly connected, Loopback0
O*I A 0.0.0.0/0 [110/65] via 192.168.208.1, 00:00:24, Serial0/0
c
）总结：精简路由条目达到减少路由负担的目的。
测试
ping 192.168.64.1
通
ping 192.168.112.1
通
即减少路由条目又不影响使用！！
四、
实验总结
掌握末节区域与完全末节区域的配置、用法、以及其带来的效果。深入理解
ospf
的工作过程及
LSA
的分类和用法！