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1、、OSPF路由汇总优点:OSPF路由汇总可以减少路由表条目，减少类型3和类型5的LSA的洪泛，节约带宽资源和减轻路由器 CPU负载，还能够对拓扑的变化本地化。二、OSPF路由汇总的两种类型如下：(两种方式均会演示)l.inter-area(IA) route summarization:发生在 ABR 上2.external route summarization:发生在 ASBR 上三、实验1： OSPF区域间汇总，发生在ABR上，接口信息及IP地址规划，区域信息如拓扑所示。FO/O: 192j?16S. 1. 1/2:4LoopbacM: 10. 1. 1.1A24Loopbactl:10
2、.L.J J1/24LoopbacltS： 10. L.l/24步骤一：配置3台路由器，并且用OSPF。Rl:R1R1enR1#conf tR1(config)#interface f0/0R1(config-if)#ip address 192.168. 1.1 255.255.255.0R1(config-if)#no shR1(config-if)#exitR1(config)#interface loopback 0R1(config-if)#ip address 10.1.1.1 255.255.255.0R1(config-if)#int lo1R1(config-if)#ip a
3、ddress 10.1.2.1 255.255.255.0R1(config-if)#int lo2Rl(config-if)#exitRl(config)#router ospf 1/启用 OSPF 路由协议Rl(config-rou ter)#ne twork 10.1.1.1 0.0.0.0 area 1/发布网段R1(config-r out er)#ne twork 10.1.2.1 0.0.0.0 area 1R1(config-r out er)#ne twork 10.1.3.1 0.0.0.0 area 1R1(config-r out er)#ne twork 192.16
4、8.1.1 0.0.0.0 area 1 R1(config-router)#endR1#R2：R2enR2#conf tR2(config)#interface f0/0R2(config-if)#ip address 192.168. 1.2 255.255.255.0R2(config-if)#no shR2(config-router)#exitR2(config)#interface f0/1R2(config-if)#ip address 192.168. 2.2 255.255.255.0R2(config-if)#no shR2(config-if)#exitR2(config
5、)#router ospf 1/启用 OSPF 路由协议R2(config-rou ter)#ne twork 192.168.1.2 0.0.0.0 area 1/同上R2(config-rou ter)#ne twork 192.168.2.2 0.0.0.0 area 0 R2(config-router)#endR2#R3：R3R3enR3#conf tR3(config)#interface f0/1R3(config-if)#ip addR3(config-if)#ip address 192.168. 2.1 255.255.255.0R3(config-if)#no shR3(
6、config-if)#exitR3(config)#ro uter ospf 1/同上R3(config-rou ter)#ne twork 192.168.2.1 0.0.0.0 area 0R3(config-router)#endR3#査看R3路由表：已经学习到R1三条明细路由R3#sh ip routeCodes: C -connected,S - static, I - IGRP,R - RIP, M - mobile,B -BGPD -EIGRP, EX- EIGRPexternal, O -OSPF, IA - OSPF interareaN1 - OSPF NSSA exter
7、nal type 1, N2 - OSPF NSSA external type 2E1 - OSPF external type 1, E2 - OSPF external type 2, E - EGPi -ISTS, L1- IS-ISlevel-1, L2 -ISTS level-2, ia - ISTSinter area* candidatedefault,U per-userstatic route, o ODRP periodic downloaded static routeGateway of last resort is not set10.0.0.0/32 is sub
8、ne tt ed, 3 subne tsO IA10.1.1.1110/3via192.168.2.2,00:01:18,FastEthernet0/1O IA10.1.2.1110/3via192.168.2.2,00:01:18,FastEthernet0/1O IA10.1.3.1110/3via192.168.2.2,00:01:18,FastEthernet0/1O IA 192.168. 1.0/24 110/2 via 192.168. 2.2, 00:01:18, FastEthernet0/1C 192.168.2.0/24 is direc tly connec ted.
9、Fas tEt herne t0/1R3#步骤二：在R2 (ABR)上执行汇总，再次査看R3上路由表R2(config)#router ospf 1R2(config-r out er)#area 1 range 10.1.0.0 255.255.252.0/把3条明细路由汇总为掩码为/22的汇总路由.R2(config-router)#endR2#査看R3路由表：R3#sh ip routeCodes: C -connected,S - static, I - IGRP,R - RIP, M - mobile,B -BGPD -EIGRP, EX- EIGRP external, O -OS
10、PF, IA - OSPF interareaN1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2El - OSPF external type 1, E2 - OSPF external type 2, E - EGPi -ISTS, L1- IS-IS level-1, L2 -ISTS level-2, ia - ISTSinter area* candidatedefault, U per-userstatic route, o ODRP periodic downloaded static routeGatewa
11、y of last resort is not set10.0.0.0/22 is subne tt ed, 1 subne tsO IA 10.1.0.0 110/65 via 192.168. 2.2, 00:00:16, FastEthernet0/1/变为掩码为22的汇总路由C 192.168.2.0/24 is direc tly connec ted. Fas tEt herne t0/1R3#实验2： OSPF区域间汇总，发生在SSBR）上,拓扑如下,R1运行了 OSPF与RIP两种路由协议，所 以它为ASBR，IP地址与区域已规划好.2811281LR2EIF：L&opback
12、O:10.1. 1.1/Z4Loopbackl: 10. l.fel/4Loopback2: 10. l.:3: 1/Z4FO/D :牌 168. 1. 1/24FO/0:192. 1&8. 1.纣訊_.十資步骤一：在2台路由器上配置OSPF与RIP,并发布网段.R1：RouterRouterenRouter#conf tRouter(config)#hostname R1Rl(config)#interface f0/0R1(config-if)#ip address 192.168. 1.1 255.255.255.0R1(config-if)#no shR1(config)#interf
13、ace loopback 0R1(config-if)#ip address 10.1.1.1 255.255.255.0R1(config-if)#int lo1R1(config-if)#ip address 10.1.2.1 255.255.255.0R1(config-if)#int lo2R1(config-if)#ip address 10.1.3.1 255.255.255.0R1(config-if)#exitR1(config)#router ospf 1/启用 OSPF 路由协议R1(config-rou ter)#ne twork 192.168. 1.1 0.0.0.0
14、 area 0 R1(config-router)#exitR1(config)#router rip/启用 RIP 路由协议R1(config-router)#version 2/扌旨定版本 2R1(config-rou ter)#no aut o-summary /不要自动汇总R1(config-rou ter)#ne twork 10.1.1.0/发布网段R1(config-r out er)#ne twork 10.1.2.0R1(config-r out er)#ne twork 10.1.3.0R1(config-router)#exitR1(config)#endR1#R2:Ro
15、uterRouterenRouter#conf tRouter(config)#hostname R2R2(config)#interface f0/0R2(config-if)#ip address 192.168. 1.2 255.255.255.0R2(config-if)#no shR2(config-if)#exitR2(config)#ro uter ospf 1/同上R2(config-rou ter)#ne twork 192.168.1.2 0.0.0.0 area 0 R2(config-router)#endR2#步骤二：在R1上把RIP与OSPF互相重发布,并査看R2路由表.R1(config)#router ripR1(config-rou ter)#redis trib ute ospf 1 me trie 1/把
