1）底层配置：
R1#sh ip int b
Interface IP-Address OK? Method Status Protocol
FastEthernet0/0 14.0.0.1 YES manual up up
Serial2/1 12.0.0.1 YES manual up up
Serial2/2 15.0.0.1 YES manual up up
R2#sh ip int b
Interface IP-Address OK? Method Status Protocol
Serial2/1 12.0.0.2 YES manual up up
Serial2/2 23.0.0.2 YES manual up up
R3#sh ip int b
Interface IP-Address OK? Method Status Protocol
Serial2/1 23.0.0.3 YES manual up up
Serial2/2 34.0.0.3 YES manual up up
R4#sh ip int b
Interface IP-Address OK? Method Status Protocol
FastEthernet0/0 14.0.0.4 YES manual up up
Serial2/1 34.0.0.4 YES manual up up
R5#sh ip int b
Interface IP-Address OK? Method Status Protocol
Serial2/1 15.0.0.5 YES manual up up
Loopback0 5.5.5.5 YES manual up up
2）运行eigrp：
R1(config)#router ei 10
R1(config-router)#net 12.0.0.0
R1(config-router)#net 15.0.0.0
R1(config-router)#net 14.0.0.0
R2(config)#router ei 10
R2(config-router)#net 12.0.0.0
R2(config-router)#net 23.0.0.0
R3(config)#router ei 10
R3(config-router)#net 23.0.0.0
R3(config-router)#net 34.0.0.0
R4(config)#router ei 10
R4(config-router)#net 14.0.0.0
R4(config-router)#net 34.0.0.0
R5(config)#router ei 10
R5(config-router)#net 15.0.0.0
3)确保运行：
R5(config-router)#end
R5#ping
01:06:15: %SYS-5-CONFIG_I: Configured from console by console
R5#ping 3.3.3.3
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 3.3.3.3, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 172/293/484 ms
确保能ping通3.3.3.3
Traceroute看R5到3.3.3.3的路径：
R5# traceroute 3.3.3.3
Type escape sequence to abort.
Tracing the route to 3.3.3.3
1 15.0.0.1 468 msec 400 msec 136 msec
2 14.0.0.4 488 msec 472 msec 492 msec
3 34.0.0.3 880 msec 1236 msec 760 msec
路径： R1---R4—R3
给R1配置使之走R1--R2—R3而非走R1---R4—R3
R1(config)#access-list 1 permit 15.0.0.5
抓出15.0.0.5的路由
R1(config)#route-map PBR permit 10
命名route-map
R1(config-route-map)#match ip add 1
匹配访问控制列表
R1(config-route-map)#set ip next-hop 12.0.0.2
设置下一跳为12.0.0.2
R1(config-route-map)#exi
R1(config)#int s2/2
R1(config-if)#ip policy route-map PBR
接口匹配策略
再次查看R5到3.3.3.3的路径
R5#traceroute 3.3.3.3
Type escape sequence to abort.
Tracing the route to 3.3.3.3
1 15.0.0.1 136 msec 140 msec 108 msec
2 14.0.0.4 156 msec 312 msec 88 msec
3 34.0.0.3 248 msec * 352 msec
R5#traceroute 3.3.3.3
Type escape sequence to abort.
Tracing the route to 3.3.3.3
1 15.0.0.1 112 msec 108 msec 64 msec | 
