实例解析EIGRP浮动汇总路由配置-

1、实例解析EIGRP浮动汇总路由配置EIGRP是增强网关内部路由线路协议。也翻译为加强型内部网关路由协议。EIGRP 是Cisco公司的私有协议。EIGRP协议继承了IGRP协议的最大的优点是矢量路由权。EIGRP协议在路由计算中要对网络带宽、网络时延、信道占用率和信道可信度等因素作全面的综合考虑,所以EIGRP的路由计算更为准确,更能反映网络的实际情况,下面让我们看一下EIGRP浮动汇总路由配置过程。EIGRP浮动汇总路由配置过程如下:EIGRP浮动汇总路由配置之拓扑图EIGRP浮动汇总路由配置之接口连接1Router1S0/0<->Router2S0/02Router2S0/1&

2、lt;->Router3S0/03Router1S0/1<->Router4S0/04Router3S0/1<->Router4S0/15VPCS V0/1<->Router1E1/06VPCS V0/2<->Router3E1/0EIGRP浮动汇总路由配置之原理在R1R2R3R4上均运行EIGRP路由协议。R4通过S0/1向R3通告一条0.0.0.00.0.0.0的汇总路由,并将这条浮动路由的管理距离设置为250,于是在网络连通的情况下R3上到达200.1.1.0/24网段的路由经过R2,而在R2与R3链路故障的时候,通过R3前往200.

3、1.1.0/24的数据包会通过R4(R3拓扑表中,默认路由由A变为PEIGRP浮动汇总路由配置之关键配置7R1:8interface Serial0/09ip address192.168.1.1255.255.255.010serial restart-delay011!12interface Serial0/113ip address192.168.3.1255.255.255.014serial restart-delay015!16interface Ethernet1/017ip address200.1.1.254255.255.255.018half-duplex19!20rou

4、ter eigrp10021network192.168.1.022network192.168.3.023network200.1.1.024no auto-summaryR2、R3略,参照R1进行接口IP和路由协议的配置,重点看下R4的配置25R4:26interface Serial0/027ip address192.168.3.2255.255.255.028serial restart-delay029!30interface Serial0/131ip address192.168.4.1255.255.255.032ip summary-address eigrp1000.0.

5、0.00.0.0.0250(向R3通过默认路由,管理距离高于EIGRP默认值!33router eigrp10034network192.168.3.035network192.168.4.036auto-summaryEIGRP浮动汇总路由配置之查看结果1.R2和R3之间链路正常时aR3的路由表:1R3#sh ip route2Codes:C-connected,S-static,I-IGRP,R-RIP,M-mobile,B-BGP3D-EIGRP,EX-EIGRP external,O-OSPF,IA-OSPF inter area4N1-OSPF NSSA external type1

6、,N2-OSPF NSSA external type25E1-OSPF external type1,E2-OSPF external type2,E-EGP6i-IS-IS,su-IS-IS summary,L1-IS-IS level-1,L2-IS-IS level-2 7ia-IS-IS inter area,*-candidate default,U-per-user static route8o-ODR,P-periodic downloaded static route9Gateway of last resort is192.168.4.1to network0.0.0.01

7、0D200.1.1.0/2490/2707456via192.168.2.1,00:00:02,Serial0/011C200.1.2.0/24is directly connected,Ethernet1/012C192.168.4.0/24is directly connected,Serial0/113D192.168.1.0/2490/2681856via192.168.2.1,00:00:02,Serial0/0 14C192.168.2.0/24is directly connected,Serial0/015D192.168.3.0/2490/3193856via192.168.

8、2.1,00:00:02,Serial0/0 16D*0.0.0.0/090/2681856via192.168.4.1,00:00:00,Serial0/1bR3的拓扑表:17R3#sh ip eigrp topology18IP-EIGRP Topology Table for AS(100/ID(200.1.2.25419Codes:P-Passive,A-Active,U-Update,Q-Query,R-Reply,20r-reply Status,s-sia Status21A0.0.0.0/0,1successors,FD is Inaccessible221replies,ac

9、tive00:00:00,query-origin:Successor Origin23Remaining replies:24via192.168.2.1,r,Serial0/025P192.168.1.0/24,1successors,FD is268185626via192.168.2.1(2681856/2169856,Serial0/027P192.168.2.0/24,1successors,FD is216985628via Connected,Serial0/029P192.168.3.0/24,1successors,FD is319385630via192.168.2.1(

10、3193856/2681856,Serial0/031P192.168.4.0/24,1successors,FD is216985632via Connected,Serial0/133P200.1.1.0/24,1successors,FD is270745634via192.168.2.1(2707456/2195456,Serial0/035P200.1.2.0/24,1successors,FD is28160036via Connected,Ethernet1/02.R2的S0/1设置为DOWN,观察R3路由表和拓扑表aR3路由表:37R3#sh ip route38Codes:C

11、-connected,S-static,I-IGRP,R-RIP,M-mobile,B-BGP39D-EIGRP,EX-EIGRP external,O-OSPF,IA-OSPF inter area40N1-OSPF NSSA external type1,N2-OSPF NSSA external type241E1-OSPF external type1,E2-OSPF external type2,E-EGP42i-IS-IS,su-IS-IS summary,L1-IS-IS level-1,L2-IS-IS level-2 43ia-IS-IS inter area,*-candi

12、date default,U-per-user static route44o-ODR,P-periodic downloaded static route45Gateway of last resort is192.168.4.1to network0.0.0.046C200.1.2.0/24is directly connected,Ethernet1/047C192.168.4.0/24is directly connected,Serial0/148C192.168.2.0/24is directly connected,Serial0/049D*0.0.0.0/090/2681856via192.168.4.1,00:00:05,Serial0/1bR3的拓扑表:50R3#sh ip eigrp topology51IP-EIGRP Topology Table for AS(100/ID(200.1.2.25452Codes:P-Passive,A-Active,U-Update,Q-Query,R-Reply,53r-reply Status,s-sia Status54P0.0.0.0/0,1successors,FD is268185655via192.168.4.1(2681856/2169856,Serial0/156P192.168.4.0/2