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OSPF配置末梢区域 满足以下四个条件的区域可以认定为Stub或者TotallyStub 区域 1、只有一个默认路由作为其区域的出口 2、区域不能作为虚链路的穿越区域 3、Stub 区域里无自治系统边界路由器ASBR 4、不是骨干区域area 0 OSPF不同区域的类型 允许的LSA类型 普通区域
Stub区域
Totally Stub 区域
NSSA区域 能学习到其他区域的路由，不能学习其他区域连接的外部路由，但可以注入本区域连接的外部路由 配置末梢区域的命令 Router（config-router）=area 区域号 stub 此命令需要在stub区域内的所有路由器上配置 1、配置路由器IP Router1配置 Router1(config)#interloopback 0 Router1(config-if)#ipadd 192.168.10.10 255.255.255.0 Router1(config-if)#noshut Router1(config-if)#exi Router1(config)# Router1(config)#interf0/0 Router1(config-if)#ipadd 192.168.1.1 255.255.255.0 Router1(config-if)#noshut Router2配置 Router2(config)#interf1/0 Router2(config-if)#ipadd 192.168.1.2 255.255.255.0 Router2(config-if)#noshut Router2(config)#interf0/0 Router2(config-if)#ipadd 192.168.2.1 255.255.255.0 Router2(config-if)#noshut Router2(config)#interf0/1 Router2(config-if)#ipadd 192.168.3.1 255.255.255.0 Router2(config-if)#noshut Router3配置 Router(config)#interloopback 0 Router(config-if)#ipadd 192.168.20.10 255.255.255.0 Router(config-if)#noshut Router(config)# Router(config)#interf0/0 Router(config-if)#ipadd 192.168.2.2 255.255.255.0 Router(config-if)#noshut Router4配置 Router(config)#interloopback 0 Router(config-if)#ipadd 192.168.30.10 255.255.255.0 Router(config-if)#noshut Router(config-if)#exi Router(config)#interf0/1 Router(config-if)#ipadd 192.168.3.2 255.255.255.0 Router(config-if)#noshut 2、配置各个路由器的OSPF Area 0 区域Router1 outer1(config)#routerospf 1 Router1(config-router)#net Router1(config-router)#network192.168.10.0 0.0.0.255 a Router1(config-router)#network192.168.10.0 0.0.0.255 area 0 Router1(config-router)#network192.168.1.0 0.0.0.255 area 0 Router1(config-router)# 区域边界路由器ASBR Router2 Router2(config)#routerospf 2 Router2(config-router)#network192.168.1.0 0.0.0.255 area 0 Router2(config-router)#network192.168.2.0 0.0.0.255 area 1 Router2(config-router)#network192.168.3.0 0.0.0.255 area 1 Router2(config-router)#area1 stub Router2(config-router)#exi Stub区域 Router3 和 Router4 Router3(config)#router ospf 3 Router3(config-router)#network 192.168.20.0 0.0.0.255area 1 Router3 (config-router)#network192.168.2.0 0.0.0.255 area 1 Router3 (config-router)#area1 stub Router3 (config-router)#exi Router3 (config)# Router4(config)#routeospf 4 Router4(config-router)#network192.168.30.0 0.0.0.255 area 1 Router4(config-router)#network192.168.3.0 0.0.0.255 area 1 Router4(config-router)#area1 stub Router4(config-router)#exi Router4(config)# 3、查看路由器路的路由表 Router2 Router2#show iproute Codes: C -connected, S - static, I - IGRP, R - RIP, M - mobile, B - BGP D - EIGRP, EX - EIGRP external, O - OSPF, IA- OSPF inter area N1 - OSPF NSSA external type 1, N2 -OSPF NSSA external type 2 E1 - OSPF external type 1, E2 - OSPFexternal type 2, E - EGP i - IS-IS, L1 - IS-IS level-1, L2 -IS-IS level-2, ia - IS-IS inter area * - candidate default, U - per-userstatic route, o - ODR P - periodic downloaded static route Gateway of lastresort is not set C 192.168.1.0/24 is directly connected,FastEthernet1/0 C 192.168.2.0/24 is directly connected,FastEthernet0/0 C 192.168.3.0/24 is directly connected,FastEthernet0/1 192.168.10.0/32 is subnetted, 1 subnets O 192.168.10.10 [110/2] via 192.168.1.1,00:05:03, FastEthernet1/0 192.168.20.0/32 is subnetted, 1 subnets O 192.168.20.10 [110/2] via 192.168.2.2,00:02:37, FastEthernet0/0 192.168.30.0/32 is subnetted, 1 subnets O 192.168.30.10 [110/2] via 192.168.3.2,00:00:54, FastEthernet0/1 | 
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