EIGRP路由协议的配置实例

1、EIGRP路由协议的配置实例EIGRP路由协议的配置拓扑图EIGRP路由协议的配置实例解析R1(config)#router eigrp 100R1(config-router)#no auto-summary /关闭自动汇总R1(config-router)#net 192.168.1.0 /宣告路由条目R1(config-router)#endR2(config)#router eigrp 100R2(config-router)#no auto-summaryR2(config-router)#net 192.168.1.0R2(config-router)#net 10.1.0.0 0

2、.0.255.255 /宣告路由条目R2(config-router)#endR3(config)#router eigrp 100R3(config-router)#no auto-summaryR3(config-router)#net 192.168.1.0R3(config-router)#net 172.16.0.0 0.0.255.255R3(config-router)#end检查：R1#show ip eigrp neighbors /查看eigrp 邻居表，发现并没有邻居IP-EIGRP neighbors for process 100R1#show ip eigrp to

3、pology /查看EIGRP 拓扑表，并没有学习到任何的路由IP-EIGRP Topology Table for AS(100)/ID(192.168.1.1)Codes: P Passive, A Active, U Update, Q Query, R Reply,r reply Status, s sia StatusP 192.168.1.0/24, 1 successors, FD is 2169856via Connected, Serial0/0因为帧中继默认为NBMA 模式，也就是非广播的多路访问模式，它会阻止广播数据和组播数据，我们在接口配置过程中，帧中继的DLCI 号和

4、IP 映射时也没有配置broadcast 参数，而EIGRP 路由协议通过组播地址224.0.0.10 来发送相应的路由信息(比如hello、update 等数据包)，所以R1 并没有发现任何的邻居路由器。为了能让EIGRP的路由信息通过帧中继传播，在没有配置broadcast 参数的情况下，我们可以通过单播的形式来发送EIGRP 数据包，我们对以上的配置进行改进：R1(config)#router eigrp 100R1(config-router)#neighbor 192.168.1.2 serial 0/0 /手工指定邻居，实现单播方式R1(config-router)#neighbo

5、r 192.168.1.3 serial 0/0R1(config-router)#endR2(config)#router eigrp 100R2(config-router)#neighbor 192.168.1.1 serial 0/0 /手工指定邻居，实现单播方式R2(config-router)#endR3(config)#router eigrp 100R3(config-router)#neighbor 192.168.1.1 serial 0/0 /手工指定邻居，实现单播方式R3(config-router)#end验证：*Mar 1 00:29:18.955: %DUAL-5

6、-NBRCHANGE: IP-EIGRP(0) 100: Neighbor 192.168.1.2 (Serial0/0) is up: new adjacency*Mar 1 00:29:19.115: %DUAL-5-NBRCHANGE: IP-EIGRP(0) 100: Neighbor 192.168.1.3 (Serial0/0) is up: new adjacencyR1#show ip eigrp neighborsIP-EIGRP neighbors for process 100H Address Interface Hold Uptime SRTT RTO Q Seq(s

7、ec) (ms) Cnt Num1 192.168.1.3 Se0/0 156 00:01:19 99 594 0 30 192.168.1.2 Se0/0 154 00:01:19 137 822 0 3R2#*Mar 1 00:29:18.979: %DUAL-5-NBRCHANGE: IP-EIGRP(0) 100: Neighbor 192.168.1.1 (Serial0/0) is up: new adjacencyR2#R2#show ip eigrp neighborIP-EIGRP neighbors for process 100H Address Interface Ho

8、ld Uptime SRTT RTO Q Seq(sec) (ms) Cnt Num0 192.168.1.1 Se0/0 138 00:02:31 171 1026 0 7R1#show ip route eigrp 100 /查看路由表，可以看到R1 能够学习到R2 和R3 相应的网络172.16.0.0/24 is subnetted, 4 subnetsD 172.16.0.0 90/2297856 via 192.168.1.3, 00:03:45, Serial0/0D 172.16.1.0 90/2297856 via 192.168.1.3, 00:03:45, Serial0

9、/0D 172.16.2.0 90/2297856 via 192.168.1.3, 00:03:45, Serial0/0D 172.16.3.0 90/2297856 via 192.168.1.3, 00:03:45, Serial0/010.0.0.0/24 is subnetted, 4 subnetsD 10.1.3.0 90/2297856 via 192.168.1.2, 00:03:45, Serial0/0D 10.1.2.0 90/2297856 via 192.168.1.2, 00:03:45, Serial0/0D 10.1.1.0 90/2297856 via 1

10、92.168.1.2, 00:03:45, Serial0/0D 10.1.0.0 90/2297856 via 192.168.1.2, 00:03:45, Serial0/0R1#ping 10.1.0.1 /验证是否可以访问R2 的网络Type escape sequence to abort.Sending 5, 100-byte ICMP Echos to 10.1.0.1, timeout is 2 seconds:!Success rate is 100 percent (5/5), round-trip min/avg/max = 20/56/104 msR1#ping 172

11、.16.0.1 /验证是否可以访问R3 的网络Type escape sequence to abort.Sending 5, 100-byte ICMP Echos to 172.16.0.1, timeout is 2 seconds:!Success rate is 100 percent (5/5), round-trip min/avg/max = 8/52/124 ms查看R2 的路由表：R2#show ip routeCodes: C connected, S static, R RIP, M mobile, B BGPD EIGRP, EX EIGRP external, O

12、OSPF, IA OSPF inter areaN1 OSPF NSSA external type 1, N2 OSPF NSSA external type 2E1 OSPF external type 1, E2 OSPF external type 2i IS-IS, su IS-IS summary, L1 IS-IS level-1, L2 IS-IS level-2ia IS-IS inter area, * candidate default, U per-user static routeo ODR, P periodic downloaded static routeGat

13、eway of last resort is not set10.0.0.0/24 is subnetted, 4 subnetsC 10.1.3.0 is directly connected, Loopback3C 10.1.2.0 is directly connected, Loopback2C 10.1.1.0 is directly connected, Loopback1C 10.1.0.0 is directly connected, Loopback0C 192.168.1.0/24 is directly connected, Serial0/0发现R2 并没有学习到R3

14、的172.16.0.0 网络， R1 通过S0/0 接口学习到R3 宣告的172.16.0.0网络，因为R1 s0/0 接口的水平分割机制导致R1 不会再由这个接口S0/0 发布出去，所以R2无法学习到R3 宣告的网络，同理，R3 也无法学习到R2 宣告的网络。对帧中继配置进行修正，使用broadcast 参数：R1(config)#router eigrp 100R1(config-router)#no neighbor 192.168.1.2 s0/0 /取消手工指定邻居*Mar 1 00:42:29.807: %DUAL-5-NBRCHANGE: IP-EIGRP(0) 100: Nei

15、ghbor 192.168.1.2 (Serial0/0) is down:R1(config-router)#no neighbor 192.168.1.3 s0/0*Mar 1 00:42:32.623: %DUAL-5-NBRCHANGE: IP-EIGRP(0) 100: Neighbor 192.168.1.3 (Serial0/0) is down:R1(config-router)#exitR1(config)#int s0/0R1(config-if)#no fram map ip 192.168.1.2 102 /取消之前不带broadcast 参数的静态映射R1(confi

16、g-if)#no fram map ip 192.168.1.3 103R1(config-if)#frame map ip 192.168.1.2 102 broadcastR1(config-if)#frame map ip 192.168.1.3 103 broadcastR1(config-if)#endR2(config)#router eigrp 100R2(config-router)#no neighbor 192.168.1.1 Serial0/0R2(config-router)#int s0/0R2(config-if)#no frame-relay map ip 192

17、.168.1.1 201R2(config-if)# frame-relay map ip 192.168.1.1 201 broadcastR3(config)#router eigrp 100R3(config-router)#no neighbor 192.168.1.1 Serial0/0R3(config-router)#int s0/0R3(config-if)#no*Mar 1 00:47:58.943: %DUAL-5-NBRCHANGE: IP-EIGRP(0) 100: Neighbor 192.168.1.1 (Serial0/0) is up: new adjacenc

18、yR3(config-if)#no frame-relay map ip 192.168.1.1 301R3(config-if)#frame-relay map ip 192.168.1.1 301 broadcastR3(config-if)#end验证结果：可以看到添加了broadcast 后，帧中继可以正常的传递组播数据了，R1 就可以和R2 和R3 建立邻居关系并正常学习到路由。R1#show ip eigrp neighborsIP-EIGRP neighbors for process 100H Address Interface Hold Uptime SRTT RTO Q S

19、eq(sec) (ms) Cnt Num1 192.168.1.3 Se0/0 178 00:00:03 906 5000 0 70 192.168.1.2 Se0/0 178 00:01:57 1040 5000 0 6R1#show ip route eigrp 100172.16.0.0/24 is subnetted, 4 subnetsD 172.16.0.0 90/2297856 via 192.168.1.3, 00:00:53, Serial0/0D 172.16.1.0 90/2297856 via 192.168.1.3, 00:00:53, Serial0/0D 172.

20、16.2.0 90/2297856 via 192.168.1.3, 00:00:53, Serial0/0D 172.16.3.0 90/2297856 via 192.168.1.3, 00:00:53, Serial0/010.0.0.0/24 is subnetted, 4 subnetsD 10.1.3.0 90/2297856 via 192.168.1.2, 00:02:46, Serial0/0D 10.1.2.0 90/2297856 via 192.168.1.2, 00:02:46, Serial0/0D 10.1.1.0 90/2297856 via 192.168.1

21、.2, 00:02:46, Serial0/0D 10.1.0.0 90/2297856 via 192.168.1.2, 00:02:46, Serial0/0查看R3 的路由表，发现R3 并没有学习到R2 的网络，这是因为R1 默认情况下接口有水平。R3#show ip routeCodes: C connected, S static, 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

22、 type 2E1 OSPF external type 1, E2 OSPF external type 2i IS-IS, su IS-IS summary, L1 IS-IS level-1, L2 IS-IS level-2ia IS-IS inter area, * candidate default, U per-user static routeo ODR, P periodic downloaded static routeGateway of last resort is not set172.16.0.0/24 is subnetted, 4 subnetsC 172.16

23、.0.0 is directly connected, Loopback0C 172.16.1.0 is directly connected, Loopback1C 172.16.2.0 is directly connected, Loopback2C 172.16.3.0 is directly connected, Loopback3C 192.168.1.0/24 is directly connected, Serial0/0将R1 接口的水平分割关闭：R1(config)#interface serial 0/0R1(config-if)#no ip split-horizon

24、eigrp 100R1(config-if)#end当R1 的水平分割关闭后，EIGRP 进程会出现相应提示：*Mar 1 00:52:25.055: %DUAL-5-NBRCHANGE: IP-EIGRP(0) 100: Neighbor 192.168.1.3 (Serial0/0) is resync: split horizon changed*Mar 1 00:52:25.055: %DUAL-5-NBRCHANGE: IP-EIGRP(0) 100: Neighbor 192.168.1.2 (Serial0/0) is resync: split horizon changed查看R1 接口S0/0 的情况：R1#show ip int s0/0 | include SplitSplit horizon is disabled查看R2 的路由表：R2#show ip route eigrp 100172.16.0.0/24 is subnetted, 4 subnetsD 172.16.0.0 90/2809856 via 192.168.1.1, 00:08:03, Serial0/0D 172.16.1.0 90/28098