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EIGRP帶寬實例配置
EIGRP路由信息在默認情況下占用接口帶寬的50%，而串行接口默認的帶寬為T1(1.544M)，但在實際上串行接口的帶寬并不是默認值，這里我們按照需求修改接口的帶寬并修改EIGRP 占用帶寬的百分比例。拓撲圖如下：
修改帶寬占用比：
R1(config)# interface s0/0
R1(config-if)# bandwidth 128 //注意，這里的單位是KB/s
R1(config-if)# ip bandwidth-percent eigrp 100 40 //修改EIGRP 路由信息占用帶寬的百分比為40
R1(config-if)# end
R2(config)# interface s0/0
R2(config-if)# bandwidth 64 //注意，這里的單位是KB/s
R2(config-if)# end
R3(config)# interface s0/0
R3(config-if)# bandwidth 64 //注意，這里的單位是KB/s
R3(config-if)# end
驗證：
R1#show interfaces serial 0/0 | include BW
MTU 1500 bytes, BW 128 Kbit, DLY 20000 usec,
EIGRP 在幀中繼網絡中使用點對點子接口的方式。第4 步配置中，可以看到R2 和R3 想要通過R1 學習到對方宣告的網絡，必須將R1 的接口S0/0 水平分割關閉才可以。這里我們使用幀中繼網絡點對點子接口的方法來完成。
點對點子接口方式：
R1(config)#default interface Serial 0/0 //將接口的配置還原為默認值
Building configuration…
Interface Serial0/0 set to default configuration
R1(config)#
*Mar 1 01:45:30.363: %DUAL-5-NBRCHANGE: IP-EIGRP(0) 100: Neighbor 192.168.1.3 (Serial0/0) is resync: split horizon changed
*Mar 1 01:45:30.367: %DUAL-5-NBRCHANGE: IP-EIGRP(0) 100: Neighbor 192.168.1.2 (Serial0/0) is resync: split horizon changed
*Mar 1 01:45:30.779: %DUAL-5-NBRCHANGE: IP-EIGRP(0) 100: Neighbor 192.168.1.3 (Serial0/0) is down: interface down
*Mar 1 01:45:30.787: %DUAL-5-NBRCHANGE: IP-EIGRP(0) 100: Neighbor 192.168.1.2 (Serial0/0) is down: interface down
*Mar 1 01:45:31.483: %LINEPROTO-5-UPDOWN: Line protocol on Interface Serial0/0, changed state to down
*Mar 1 01:45:33.499: %LINEPROTO-5-UPDOWN: Line protocol on Interface Serial0/0, changed state to up
R1(config)#interface Serial 0/0
R1(config-if)#encapsulation fram //封裝為幀中繼模式
R1(config-if)#no fram inv //關閉自動獲取
R1(config-if)#no sh
R1(config-if)#ip split eigrp 100 //打開水平分割
R1(config-if)#int s0/0.1 point //設置點對點子接口
R1(config-subif)#ip add 192.168.1.1 255.255.255.252
R1(config-subif)#fram interface-dlci 102 //指定接口DLCI 號
R1(config-fr-dlci)#int s0/0.2 point //配置R1 和R3 之間的子接口
R1(config-subif)#ip add 192.168.1.5 255.255.255.252
R1(config-subif)#fram interface-dlci 103
*Mar 1 01:47:05.767: %DUAL-5-NBRCHANGE: IP-EIGRP(0) 100: Neighbor 192.168.1.2 (Serial0/0.1) is up: new adjacency
*Mar 1 01:47:06.651: IP-EIGRP(Default-IP-Routing-Table:100): Neighbor 192.168.1.3 not on common subnet for Serial0/0.2
R1(config-fr-dlci)#end
因為R1 和R2 相連的子接口IP 地址和子網掩碼有所變化必須修改
R2(config)#int s0/0
R2(config-if)#ip add 192.168.1.2 255.255.255.252
因為R1 和R3 相連的子接口IP 地址和子網掩碼有所變化必須修改
R3(config)#int s0/0
R3(config-if)#ip add 192.168.1.6 255.255.255.252
*Mar 1 01:47:51.331: %DUAL-5-NBRCHANGE: IP-EIGRP(0) 100: Neighbor 192.168.1.5 (Serial0/0) is down: address changed
*Mar 1 01:47:51.343: %DUAL-5-NBRCHANGE: IP-EIGRP(0) 100: Neighbor 192.168.1.1 (Serial0/0) is down: address changed
*Mar 1 01:47:52.463: %DUAL-5-NBRCHANGE: IP-EIGRP(0) 100: Neighbor 192.168.1.5 (Serial0/0) is up: new adjacency
R3(config-if)#no frame-relay map ip 192.168.1.1 301 broadcas //將之前配置的取消
R3(config-if)#fram map ip 192.168.1.5 301 br
驗證配置：
R1#show ip eigrp neighbors
IP-EIGRP neighbors for process 100
H Address Interface Hold Uptime SRTT RTO Q Seq
(sec) (ms) Cnt Num
1 192.168.1.6 Se0/0.2 173 00:06:53 117 1053 0 15
0 192.168.1.2 Se0/0.1 135 00:07:12 1055 5000 0 16
R3#ping 10.1.1.1
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 10.1.1.1, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 20/89/180 ms
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