1、动态IGRP路由,IGRP协议,IGRP由于突破了15跳的限制，成为了当时大型CISCO网络的首选协议。（100-大型网络） RIP与IGRP的工作机制，均是从所有配置接口上定期发出路由更新。 但是，RIP是以跳数为度量单位；IGRP以多种因素来建立路由最佳路径；带宽，延迟，可靠性，最大传输单元，LOAD等因素。,什么是区域 ？,区域拓朴从区域外是看不见的 结果是路由业务的大量减少,Backbone Area #0,IGRP的配置：,2501(config)#router igrp 100 2501(config-router)#network 192.168.2.0 2501(config-
2、router)#exit 注意： 1）编号的有效范围为165535，编号用确定一组区域编号相同的路由器和接口 2）不同的编号的路由器不参与路由更新,IGRP的验证：,2501#show run（查看配置文件） 2501#show ip protocols（IP路由协议） 2501#show ip route(IP路由表) 2501#show ip route C - connected, 直接相连的网络； S - static, 静态路由 I - IGRP, R - RIP,B - BGP ， D - EIGRP, O - OSPF,路由配置修改：,1，路由删除： 2501(config)#n
3、o router igrp 100 2501(config)# 2，IP地址的删除 2501(config)#int s0 2501(config-if)#no ip add 2501(config-if)#no ip address 2501(config-if)#,router igrp 100 network 172.16.0.0 network 10.0.0.0,IGRP Configuration Example,router igrp 100 network 10.0.0.0,router igrp 100 network 192.168.1.0 network 10.0.0.0,
4、Autonomous System = 100,172.16.1.1,S2,E0,S3,192.168.1.1,10.1.1.1,10.2.2.2,10.1.1.2,S2,S3,10.2.2.3,172.16.1.0,A,B,C,192.168.1.0,E0,Verifying the Routing ProtocolIGRP,RouterA#sh ip protocols Routing Protocol is “igrp 100“Sending updates every 90 seconds, next due in 21 secondsInvalid after 270 seconds
5、, hold down 280, flushed after 630Outgoing update filter list for all interfaces isIncoming update filter list for all interfaces isDefault networks flagged in outgoing updatesDefault networks accepted from incoming updatesIGRP metric weight K1=1, K2=0, K3=1, K4=0, K5=0IGRP maximum hopcount 100IGRP
6、maximum metric variance 1Redistributing: igrp 100Routing for Networks:10.0.0.0172.16.0.0Routing Information Sources:Gateway Distance Last Update10.1.1.2 100 00:01:01Distance: (default is 100),172.16.1.1,S2,E0,S3,192.168.1.1,10.1.1.1,10.2.2.2,10.1.1.2,S2,S3,10.2.2.3,172.16.1.0,A,B,C,192.168.1.0,E0,Di
7、splaying the IP Routing Table,RouterA#sh ip route Codes: C - connected, S - static, I - IGRP, R - RIP, M - mobile, B - BGPD - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter areaN1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2E1 - OSPF external type 1, E2 - OSPF external type 2,
8、E - EGPi - IS-IS, L1 - IS-IS level-1, L2 - IS-IS level-2, * - candidate defaultU - per-user static route, o - ODRT - traffic engineered routeGateway of last resort is not set172.16.0.0/24 is subnetted, 1 subnets C 172.16.1.0 is directly connected, Ethernet010.0.0.0/24 is subnetted, 2 subnets I 10.2.
9、2.0 100/90956 via 10.1.1.2, 00:00:23, Serial2 C 10.1.1.0 is directly connected, Serial2 I 192.168.1.0/24 100/91056 via 10.1.1.2, 00:00:23, Serial2,172.16.1.1,S2,E0,S3,192.168.1.1,10.1.1.1,10.2.2.2,10.1.1.2,S2,S3,10.2.2.3,172.16.1.0,A,B,C,192.168.1.0,E0,SHOW IP ROUTE I 192.168.1.0/24 100/91056 via 10
10、.1.1.2, 00:00:23, Serial2I:表示由IGRP所引入的路由， 100：表示IGRP的管理距离； 91056:表示组合度量值；组合度量值越低，说明路由越好；组合度量是通过带宽和线路延迟计算出来的。,Updating Routing Information Example (cont.),RouterB#sh ip route Codes: C - connected, S - static, I - IGRP, R - RIP, M - mobile, B - BGPD - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF in
11、ter areaN1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2E1 - OSPF external type 1, E2 - OSPF external type 2, E - EGPi - IS-IS, L1 - IS-IS level-1, L2 - IS-IS level-2, * - candidate defaultU - per-user static route, o - ODRT - traffic engineered routeGateway of last resort is not setI
12、172.16.0.0/16 is possibly down, routing via 10.1.1.1, Serial210.0.0.0/24 is subnetted, 2 subnets C 10.1.1.0 is directly connected, Serial2 C 10.2.2.0 is directly connected, Serial3 I 192.168.1.0/24 100/89056 via 10.2.2.3, 00:00:14, Serial3 RouterB#ping 172.16.1.1Type escape sequence to abort. Sendin
13、g 5, 100-byte ICMP Echos to 172.16.1.1, timeout is 2 seconds: . Success rate is 0 percent (0/5) RouterB#,172.16.1.1,S2,E0,S3,192.168.1.1,10.1.1.1,10.2.2.2,10.1.1.2,S2,S3,10.2.2.3,172.16.1.0,A,B,C,192.168.1.0,E0,X,是否支持IP ROUTE,4000a(config)#no ip routing 4000a(config)#router rip IP routing not enabled 4000a(config)#router igrp 100 IP routing not enabled 4000a(config)#ip routing 4000a(config)#router igrp 100 4000a(config-router)#,思考：,什么情况下，用动态IP？ 什么情况下，用动态路由？,
