一、实验目的掌握EIGRP的配置掌握EIGRP负载均衡的配置掌握EIGRP中地址的手工汇总二、实验内容与实验要求实验内容、原理分析及具体实验要求。
实现网络的互连互通，从而实现信息的共享和传递。
R1和R2之间连接的两条线路形成负载均衡关系；进行指定的地址手工汇总。
三、实验环境实验所使用的设备名称及规格、网络结构图。
路由器3台四、实验过程与分析根据具体实验，记录、整理相应命令、运行结果等。
详细记录在实验过程中发生的故障和问题，并进行故障分析，说明故障排除的过程及方法。
1.在所有路由器上进行IP地址基本配置，并测试直连链路的连通性。
R1：F0/0Router>ENRouter#conf tEnter configuration commands, one per line. End with CNTL/Z.Router(config)#interface F0/0Router(config-if)#ip address 21.21.21.1 255.255.255.0Router(config-if)#no shut%LINK-5-CHANGED: Interface FastEthernet0/0, changed state to up Router(config-if)#exitS0/2/0Router(config)#int s0/2/0Router(config-if)#ip address 12.12.12.1 255.255.255.0Router(config-if)#clock rate 64000Router(config-if)#no shut%LINK-5-CHANGED: Interface Serial0/2/0, changed state to downRouter(config-if)#exitLo1Router(config)#int lo1Router(config-if)#ip address 1.1.1.1 255.255.255.0Router(config-if)#no shutR2：F0/0Router>enRouter#conf tEnter configuration commands, one per line. End with CNTL/Z.Router(config)#int f0/0Router(config-if)#ip address 21.21.21.2 255.255.255.0Router(config-if)#no shut%LINK-5-CHANGED: Interface FastEthernet0/0, changed state to up%LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/0, changed state to upRouter(config-if)#exitS0/2/0Router(config)#int s0/2/0Router(config-if)#ip add 12.12.12.2 255.255.255.0Router(config-if)#no shut%LINK-5-CHANGED: Interface Serial0/2/0, changed state to upS0/2/1Router(config)#int s0/2/1Router(config-if)#ip add 23.23.23.2 255.255.255.0Router(config-if)#clock rate 64000Router(config-if)#no shut%LINK-5-CHANGED: Interface Serial0/2/1, changed state to upRouter(config-if)#%LINEPROTO-5-UPDOWN: Line protocol on Interface Serial0/2/1, changed state to upLo1Router(config)#int lo 1Router(config-if)#%LINK-5-CHANGED: Interface Loopback1, changed state to up%LINEPROTO-5-UPDOWN: Line protocol on Interface Loopback1, changed state to upRouter(config-if)#ip add 2.2.2.2 255.255.255.0Router(config-if)#no shutRouter(config-if)#exitR3：S0/2/0Router>enRouter#conf tEnter configuration commands, one per line. End with CNTL/Z.Router(config)#int s0/2/0Router(config-if)#ip address 23.23.23.3 255.255.255.0Router(config-if)#no shut%LINK-5-CHANGED: Interface Serial0/2/0, changed state to downRouter(config-if)#exitLo1Router(config)#int lo 1Router(config-if)#ip address 3.3.3.3 255.255.255.0Router(config-if)#no shutRouter(config-if)#exit测试连通性R1 ping R2Router>ping 12.12.12.2Type 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 = 3/5/6 ms Router>ping 21.21.21.2Type escape sequence to abort.Sending 5, 100-byte ICMP Echos to 21.21.21.2, timeout is 2 seconds: .!!!!Success rate is 80 percent (4/5), round-trip min/avg/max = 20/20/20 ms R3 ping R2Router>ping 23.23.23.2Type 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 = 20/21/26 ms 2.在各路由器上用eigrp进行配置R1:Router(config)#router eigrp 1Router(config-router)#network 12.12.12.0 0.0.0.255Router(config-router)#network 21.0.0.0Router(config-router)#network 1.0.0.0R2：Router(config)#router eigrp 1Router(config-router)#network 23.0.0.0Router(config-router)#network 12.0.0.0Router(config-router)#%DUAL-5-NBRCHANGE: IP-EIGRP 1: Neighbor 12.12.12.1 (Serial0/2/0) is up: new adjacencyRouter(config-router)#network 21.0.0.0Router(config-router)#%DUAL-5-NBRCHANGE: IP-EIGRP 1: Neighbor 21.21.21.1 (FastEthernet0/0) is up: new adjacencyRouter(config-router)#network 2.0.0.0R3：Router(config)#router eigrp 1Router(config-router)#network 3.0.0.0Router(config-router)#network 23.0.0.0Router(config-router)#%DUAL-5-NBRCHANGE: IP-EIGRP 1: Neighbor 23.23.23.2 (Serial0/2/0) is up: new adjacency3.用show ip route命令检查路由是否正确，查看关键信息R1R2R34.用show ip eigrp topology、show ip eigrp neighbor查看拓扑表和邻居表R1R2R35.关闭R1的f0/0，在R1上查看到达3.0.0.0/8的metric值，在R1上配置正确的variance值，以达到不等价负载平衡（可以在s0/0接口上调整bandwidth值）。
R1Router(config)#int f0/0Router(config-if)#shutdownRouter(config-if)#exit配置variance 值Router(config)#router eigrp 1Router(config-router)#variance 10Router(config-router)#exit6.在R2上关闭自动汇总，在R1、R2、R3上再次查看路由掩码的变化Router(config)#router eigrp 1Router(config-router)#no auto-summary%DUAL-5-NBRCHANGE: IP-EIGRP 1: Neighbor 21.21.21.1 (FastEthernet0/0) is up: new adjacency%DUAL-5-NBRCHANGE: IP-EIGRP 1: Neighbor 12.12.12.1 (Serial0/2/0) is up: new adjacency%DUAL-5-NBRCHANGE: IP-EIGRP 1: Neighbor 23.23.23.3 (Serial0/2/1) is up: new adjacency7.在R2上s0/2/1接口上进行手工汇总，汇总地址为：12.12.0.0 255.255.0.0，在R3上查看路由的变化。