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一、实验拓扑
二、设置路由器IP R1： R1(config)#int s0/0 R1(config-if)#ip add 12.12.12.1 255.255.255.0 R1(config-if)#no shut R2： R2(config)#int s0/0 R2(config-if)#ip add 12.12.12.2 255.255.255.0 R2(config-if)#no shut R2(config)#int s0/1 R2(config-if)#ip add 23.23.23.2 255.255.255.0 R2(config-if)#no shut R3： R3(config)#int s0/0 R3(config-if)#ip add 23.23.23.3 255.255.255.0 R3(config-if)#no shut 配置完成后测试直连网络的连通性 R1： R1#ping 12.12.12.2 Type escape sequence to abort. Sending 5, 100-byte ICMP Echos to 12.12.12.2, timeout is 2 seconds: !!!!! Success rate is 100 percent (5/5), round-trip min/avg/max = 3/4/6 ms R2： R2#ping 12.12.12.1 Type escape sequence to abort. Sending 5, 100-byte ICMP Echos to 12.12.12.1, timeout is 2 seconds: !!!!! Success rate is 100 percent (5/5), round-trip min/avg/max = 2/3/5 ms R2#ping 23.23.23.3 Type escape sequence to abort. Sending 5, 100-byte ICMP Echos to 23.23.23.3, timeout is 2 seconds: !!!!! Success rate is 100 percent (5/5), round-trip min/avg/max = 2/3/6 ms R3： R3#ping 23.23.23.2 Type escape sequence to abort. Sending 5, 100-byte ICMP Echos to 23.23.23.2, timeout is 2 seconds: !!!!! Success rate is 100 percent (5/5), round-trip min/avg/max = 3/4/6 ms 直连网络连接成功！ 三、配置EIGRP 1、在三台路由器上的开启换回接口 R1： R1(config)#int loopback 0 R1(config-if)# %LINK-5-CHANGED: Interface Loopback0, changed state to up %LINEPROTO-5-UPDOWN: Line protocol on Interface Loopback0, changed state to up R1(config-if)#ip add 1.1.1.1 255.255.255.0 R2： R2(config)#int loopback 0 %LINK-5-CHANGED: Interface Loopback0, changed state to up %LINEPROTO-5-UPDOWN: Line protocol on Interface Loopback0, changed state to up R2(config-if)# R2(config-if)#ip add 2.2.2.2 255.255.255.0 R3： R3(config)#int loopback 0 %LINK-5-CHANGED: Interface Loopback0, changed state to up %LINEPROTO-5-UPDOWN: Line protocol on Interface Loopback0, changed state to up R3(config-if)# R3(config-if)#ip add 3.3.3.3 255.255.255.0 2、配置EIGRP---------注意使用反掩码和不使用反掩码的区别 R1： R1(config)#router eigrp 100 R1(config-router)#network 12.12.12.0 0.0.0.255 R1(config-router)#network 1.0.0.0 R1(config-router)# R2： R2(config)#router eigrp 100 R2(config-router)#network 12.12.12.0 0.0.0.255 R2(config-router)# %DUAL-5-NBRCHANGE: IP-EIGRP 100: Neighbor 12.12.12.1 (Serial0/0) is up: new adjacency R2(config-router)#network 2.2.2.0 0.0.0.255 R2(config-router)#network 23.23.23.0 0.0.0.255 R3： R3(config)#router eigrp 100 R3(config-router)#network 23.23.23.0 255.255.255.0 R3(config-router)# %DUAL-5-NBRCHANGE: IP-EIGRP 100: Neighbor 23.23.23.2 (Serial0/0) is up: new adjacency R3(config-router)#network 3.3.3.0 0.0.0.255 EIGRP已经成功开启，下面使用show ip protocol 来查看下配置的正确性 R1： R1(config-router)#do show ip pro Routing Protocol is "eigrp 100 " Outgoing update filter list for all interfaces is not set Incoming update filter list for all interfaces is not set Default networks flagged in outgoing updates Default networks accepted from incoming updates EIGRP metric weight K1=1, K2=0, K3=1, K4=0, K5=0 EIGRP maximum hopcount 100 EIGRP maximum metric variance 1 Redistributing: eigrp 100 Automatic network summarization is in effect Automatic address summarization: 1.0.0.0/8 for Serial0/0 Summarizing with metric 128256 12.0.0.0/8 for Loopback0 Summarizing with metric 20512000 Maximum path: 4 Routing for Networks: 12.12.12.0/24 1.0.0.0 Routing Information Sources: Gateway Distance Last Update 12.12.12.2 90 1148582 Distance: internal 90 external 170 在三台路由器上使用show ip route 命令来查看路由表 R1： 1.0.0.0/8 is variably subnetted, 2 subnets, 2 masks D 1.0.0.0/8 is a summary, 00:09:45, Null0 C 1.1.1.0/24 is directly connected, Loopback0 D 2.0.0.0/8 [90/20640000] via 12.12.12.2, 00:07:50, Serial0/0 D 3.0.0.0/8 [90/21152000] via 12.12.12.2, 00:04:09, Serial0/0 12.0.0.0/8 is variably subnetted, 2 subnets, 2 masks D 12.0.0.0/8 is a summary, 00:09:45, Null0 C 12.12.12.0/24 is directly connected, Serial0/0 D 23.0.0.0/8 [90/21024000] via 12.12.12.2, 00:07:36, Serial0/0 由以上信息可以看出，EIGRP已经正确配置 3、关闭EIGRP自动汇总动能 R1(config-router)#no auto-summary R2(config-router)#no auto-summary R3(config-router)#no auto-summary 再次使用show ip route 命令查看路由表区别 1.0.0.0/24 is subnetted, 1 subnets C 1.1.1.0 is directly connected, Loopback0 2.0.0.0/24 is subnetted, 1 subnets D 2.2.2.0 [90/20640000] via 12.12.12.2, 00:01:37, Serial0/0 3.0.0.0/24 is subnetted, 1 subnets D 3.3.3.0 [90/21152000] via 12.12.12.2, 00:01:12, Serial0/0 12.0.0.0/24 is subnetted, 1 subnets C 12.12.12.0 is directly connected, Serial0/0 23.0.0.0/24 is subnetted, 1 subnets D 23.23.23.0 [90/21024000] via 12.12.12.2, 00:01:37, Serial0/0 可以看出已经取消了自动汇总 4、在R3上使用手动汇总 R3(config-if)#ip summary-address eigrp 100 3.3.0.0 255.255.0.0 在R1使用show ip route 来查看R3的路由表信息已经变化 R1： 1.0.0.0/24 is subnetted, 1 subnets C 1.1.1.0 is directly connected, Loopback0 2.0.0.0/24 is subnetted, 1 subnets D 2.2.2.0 [90/20640000] via 12.12.12.2, 00:05:41, Serial0/0 3.0.0.0/16 is subnetted, 1 subnets D 3.3.0.0 [90/21152000] via 12.12.12.2, 00:01:23, Serial0/0 12.0.0.0/24 is subnetted, 1 subnets C 12.12.12.0 is directly connected, Serial0/0 23.0.0.0/24 is subnetted, 1 subnets D 23.23.23.0 [90/21024000] via 12.12.12.2, 00:05:41, Serial0/0 R1(config-router)# 5、使用debug命令 先使用unbug all命令，方便以后可以快速关闭debug命令 R1#un all All possible debugging has been turned off R1#debug ip eigrp
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