CCNA实验之--EIGRP基本配置

呵呵，我又来了，今天来做一下Cisco私有的路由协议——EIGRP基本配置。

EIGRP用AS（自治系统）编号来指定拥有相同路由的路由器集合，凡是属于同一区域的网段，都要求拥有相同的AS号，范围是1-65535。AS号不同的路由器之间不能建立邻接关系，无法同一路由信息，除非做再发布。

实验环境：



R1基本配置：

Router>

Router>en

Router#conf t

Router1(config)#hostname R1

R1(config)#interface loopback 0

R1(config-if)#ip address 1.1.1.1 255.255.255.255

R1(config-if)#interface s1/0

R1(config-if)#ip address 12.12.12.1 255.255.255.0

R1(config-if)#no shutdown

R1(config-if)#int fa0/0

R1(config-if)#ip address 13.13.13.1 255.255.255.0

R1(config-if)#no shutdown

R2基本配置：

Router>

Router>en

Router(config)#hostname R2

R2(config)#interface loopback 0

R2(config-if)#ip address 2.2.2.2 255.255.255.255

R2(config-if)#int s1/0

R2(config-if)#ip address 12.12.12.2 255.255.255.0

R2(config-if)#clock rate 64000

R2(config-if)#no shutdown

R2(config-if)#int s1/1

R2(config-if)#ip address 23.23.23.1 255.255.255.0

R2(config-if)#clock rate 64000

R2(config-if)#no shutdown

R2(config-if)#exit

R3基本配置：

Router>

Router>en

Router#conf t

Router(config)#hostname R3

R3(config)#interface loopback 0

R3(config-if)#ip address 3.3.3.3 255.255.255.255

R3(config-if)#int s1/1

R3(config-if)#ip address 23.23.23.2 255.255.255.0

R3(config-if)#no shutdown

R3(config-if)#int fa0/0

R3(config-if)#ip address 13.13.13.2 255.255.255.0

R3(config-if)#no shutdown

R3(config-if)#exit

基本配置已近完成，下面在各路由器上起EIGRP协议，

R1(config-if)#exit

R1(config)#router eigrp 100

R1(config-router)#network 1.1.1.1 0.0.0.0

R1(config-router)#network 12.12.12.0 0.0.0.255

//宣告允许发布的直连网段，用通配符掩码定义范围

R1(config-router)#network 13.13.13.0 0.0.0.255

R1(config-router)#no auto-summary //关闭自动汇总

R1(config-router)#exit

R2(config)#router eigrp 100

R2(config-router)#no network 2.2.2.2 0.0.0.0

R2(config-router)#network 12.12.12.0 0.0.0.255

%DUAL-5-NBRCHANGE: IP-EIGRP 100: Neighbor 12.12.12.1 (Serial1/0) is up: new adjacenc

//提示邻居建立

R2(config-router)#network 23.23.23.0 0.0.0.255

R2(config-router)#no auto-summary

R2(config-router)#exit

R3(config)#router eigrp 100

R3(config-router)#network 3.3.3.3 0.0.0.0

R3(config-router)#network 23.23.23.0 0.0.0.255

%DUAL-5-NBRCHANGE: IP-EIGRP 100: Neighbor 23.23.23.1 (Serial1/1) is up: new adjacency

R3(config-router)#network 13.13.13.0 0.0.0.255

%DUAL-5-NBRCHANGE: IP-EIGRP 100: Neighbor 13.13.13.1 (FastEthernet0/0) is up: new adjacency

R3(config-router)#no auto-summary

R3(config-router)#exit

我们来查看EIGRP信息，

R1#show ip eigrp neighbors //查看R1的EIGRP邻居表

IP-EIGRP neighbors for process 100

H Address Interface Hold Uptime SRTT RTO Q Seq

(sec) (ms) Cnt Num

0 12.12.12.2 Ser1/0 12 00:12:06 40 1000 0 31

1 13.13.13.2 Fa0/0 12 00:08:28 40 1000 0 32

R1#show ip eigrp interfaces

IP-EIGRP interfaces for process 100

Xmit Queue Mean Pacing Time Multicast Pending

Interface Peers Un/Reliable SRTT Un/Reliable Flow Timer Routes

Lo0 0 0/0 1236 0/10 0 0

Ser1/0 1 0/0 1236 0/10 0 0

Fa0/0 1 0/0 1236 0/10 0 0

R1#show ip eigrp topology

IP-EIGRP Topology Table for AS 100

Codes: P - Passive, A - Active, U - Update, Q - Query, R - Reply,

r - Reply status

P 1.1.1.1/32, 1 successors, FD is 128256

via Connected, Loopback0

P 12.12.12.0/24, 1 successors, FD is 20512000

via Connected, Serial1/0

P 1.0.0.0/8, 1 successors, FD is 128256

via Summary (128256/0), Null0

P 12.0.0.0/8, 1 successors, FD is 20512000

via Summary (20512000/0), Null0

P 13.13.13.0/24, 1 successors, FD is 28160

via Connected, FastEthernet0/0

P 13.0.0.0/8, 1 successors, FD is 28160

via Summary (28160/0), Null0

P 2.2.2.2/32, 1 successors, FD is 20640000

via 12.12.12.2 (20640000/20640000), Serial1/0

via 13.13.13.2 (20642560/20640000), FastEthernet0/0

P 2.0.0.0/8, 1 successors, FD is 20640000

via 12.12.12.2 (20640000/128256), Serial1/0

via 13.13.13.2 (20642560/20640000), FastEthernet0/0

P 23.23.23.0/24, 1 successors, FD is 20514560

via 13.13.13.2 (20514560/20512000), FastEthernet0/0

via 12.12.12.2 (4294967295/20512000), Serial1/0

//去往23.23.23.0/24网段的可行继任者

P 23.0.0.0/8, 1 successors, FD is 20514560

via 13.13.13.2 (20514560/20512000), FastEthernet0/0

P 3.0.0.0/8, 1 successors, FD is 156160

via 13.13.13.2 (156160/128256), FastEthernet0/0

P 3.3.3.3/32, 1 successors, FD is 156160

via 13.13.13.2 (156160/128256), FastEthernet0/0

R1#show ip route eigrp

D 1.0.0.0/8 is a summary, 00:42:11, Null0

D 2.0.0.0/8 [90/20640000] via 12.12.12.2, 00:32:43, Serial1/0

D 2.2.2.2/32 [90/20640000] via 12.12.12.2, 00:04:53, Serial1/0

D 3.0.0.0/8 [90/156160] via 13.13.13.2, 00:29:08, FastEthernet0/0

D 3.3.3.3/32 [90/156160] via 13.13.13.2, 00:29:08, FastEthernet0/0

D 12.0.0.0/8 is a summary, 00:42:11, Null0

D 13.0.0.0/8 is a summary, 00:42:02, Null0

D 23.0.0.0/8 [90/20514560] via 13.13.13.2, 00:29:08, FastEthernet0/0

D 23.23.23.0/24 [90/20514560] via 13.13.13.2, 00:29:08, FastEthernet0/0

R1#show ip route

Codes: C - connected, S - static, I - IGRP, R - RIP, M - mobile, B - BGP

D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area

N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2

E1 - OSPF external type 1, E2 - OSPF external type 2, E - EGP

i - IS-IS, L1 - IS-IS level-1, L2 - IS-IS level-2, ia - IS-IS inter area

* - candidate default, U - per-user static route, o - ODR

P - periodic downloaded static route

Gateway of last resort is not set

1.0.0.0/8 is variably subnetted, 2 subnets, 2 masks

D 1.0.0.0/8 is a summary, 00:42:56, Null0

C 1.1.1.1/32 is directly connected, Loopback0

2.0.0.0/8 is variably subnetted, 2 subnets, 2 masks

D 2.0.0.0/8 [90/20640000] via 12.12.12.2, 00:33:29, Serial1/0

D 2.2.2.2/32 [90/20640000] via 12.12.12.2, 00:05:38, Serial1/0

3.0.0.0/8 is variably subnetted, 2 subnets, 2 masks

D 3.0.0.0/8 [90/156160] via 13.13.13.2, 00:29:53, FastEthernet0/0

D 3.3.3.3/32 [90/156160] via 13.13.13.2, 00:29:53, FastEthernet0/0

12.0.0.0/8 is variably subnetted, 2 subnets, 2 masks

D 12.0.0.0/8 is a summary, 00:42:56, Null0

C 12.12.12.0/24 is directly connected, Serial1/0

13.0.0.0/8 is variably subnetted, 2 subnets, 2 masks

D 13.0.0.0/8 is a summary, 00:42:47, Null0

C 13.13.13.0/24 is directly connected, FastEthernet0/0

23.0.0.0/8 is variably subnetted, 2 subnets, 2 masks

D 23.0.0.0/8 [90/20514560] via 13.13.13.2, 00:29:53, FastEthernet0/0

D 23.23.23.0/24 [90/20514560] via 13.13.13.2, 00:29:53, FastEthernet0/0

//路由表中没有可行继任者，只有继任者条目

下面我们做EIGRP路由汇总，

先在R3上激活4个loopback口，

R3(config)#interface loopback 1

R3(config-if)#ip address 192.168.0.1 255.255.255.0

R3(config)#interface loopback 2

R3(config-if)#ip address 192.168.1.1 255.255.255.0

R3(config)#interface loopback 3

R3(config-if)#ip address 192.168.2.1 255.255.255.0

R3(config)#interface loopback 4

R3(config-if)#ip address 192.168.3.1 255.255.255.0

在R3上宣告网段，

R3(config-router)#network 192.168.0.1 0.0.0.255

R3(config-router)#network 192.168.1.1 0.0.0.255

R3(config-router)#network 192.168.2.1 0.0.0.255

R3(config-router)#network 192.168.3.1 0.0.0.255

在R1上查看路由表，

R1# sh ip rou

Gateway of last resort is not set

1.0.0.0/8 is variably subnetted, 2 subnets, 2 masks

D 1.0.0.0/8 is a summary, 00:59:15, Null0

C 1.1.1.1/32 is directly connected, Loopback0

2.0.0.0/8 is variably subnetted, 2 subnets, 2 masks

D 2.0.0.0/8 [90/20640000] via 12.12.12.2, 00:05:46, Serial1/0

D 2.2.2.2/32 [90/20640000] via 12.12.12.2, 00:21:57, Serial1/0

3.0.0.0/8 is variably subnetted, 2 subnets, 2 masks

D 3.0.0.0/8 [90/156160] via 13.13.13.2, 00:05:47, FastEthernet0/0

D 3.3.3.3/32 [90/156160] via 13.13.13.2, 00:05:47, FastEthernet0/0

12.0.0.0/8 is variably subnetted, 2 subnets, 2 masks

D 12.0.0.0/8 is a summary, 00:59:15, Null0

C 12.12.12.0/24 is directly connected, Serial1/0

13.0.0.0/8 is variably subnetted, 2 subnets, 2 masks

D 13.0.0.0/8 is a summary, 00:59:06, Null0

C 13.13.13.0/24 is directly connected, FastEthernet0/0

23.0.0.0/8 is variably subnetted, 2 subnets, 2 masks

D 23.0.0.0/8 [90/20514560] via 13.13.13.2, 00:05:47, FastEthernet0/0

D 23.23.23.0/24 [90/20514560] via 13.13.13.2, 00:05:47, FastEthernet0/0

192.168.0.0/24 is variably subnetted, 2 subnets, 2 masks

D 192.168.0.0/22 [90/20514560] via 13.13.13.2, 00:05:47, FastEthernet0/0

D 192.168.0.0/24 [90/156160] via 13.13.13.2, 00:02:44, FastEthernet0/0

D 192.168.1.0/24 [90/156160] via 13.13.13.2, 00:02:17, FastEthernet0/0

D 192.168.2.0/24 [90/156160] via 13.13.13.2, 00:00:22, FastEthernet0/0

D 192.168.3.0/24 [90/156160] via 13.13.13.2, 00:01:34, FastEthernet0/0

D 192.168.4.0/24 [90/44765440] via 13.13.13.2, 00:03:53, FastEthernet0/0

//可见到4条详细的路由信息，都来自fa0/0

下面在R3接口上开启路由汇总，

R3(config-if)#int fa0/0

R3(config-if)#ip summary-address eigrp 100 192.168.0.0 255.255.252.0

%DUAL-5-NBRCHANGE: IP-EIGRP 100: Neighbor 13.13.13.1 (FastEthernet0/0) is up: new adjacency //这里会重新建立一次邻居

R3(config-if)#int s1/1

R3(config-if)#ip summary-address eigrp 100 192.168.0.0 255.255.252.0

再到R1上查看路由表，

R1#sh ip route

Gateway of last resort is not set

1.0.0.0/8 is variably subnetted, 2 subnets, 2 masks

D 1.0.0.0/8 is a summary, 01:03:54, Null0

C 1.1.1.1/32 is directly connected, Loopback0

2.0.0.0/8 is variably subnetted, 2 subnets, 2 masks

D 2.0.0.0/8 [90/20642560] via 13.13.13.2, 00:00:17, FastEthernet0/0

D 2.2.2.2/32 [90/20640000] via 12.12.12.2, 00:26:36, Serial1/0

3.0.0.0/8 is variably subnetted, 2 subnets, 2 masks

D 3.0.0.0/8 [90/156160] via 13.13.13.2, 00:00:17, FastEthernet0/0

D 3.3.3.3/32 [90/156160] via 13.13.13.2, 00:00:17, FastEthernet0/0

12.0.0.0/8 is variably subnetted, 2 subnets, 2 masks

D 12.0.0.0/8 is a summary, 01:03:54, Null0

C 12.12.12.0/24 is directly connected, Serial1/0

13.0.0.0/8 is variably subnetted, 2 subnets, 2 masks

D 13.0.0.0/8 is a summary, 01:03:45, Null0

C 13.13.13.0/24 is directly connected, FastEthernet0/0

23.0.0.0/8 is variably subnetted, 2 subnets, 2 masks

D 23.0.0.0/8 [90/20514560] via 13.13.13.2, 00:00:17, FastEthernet0/0

D 23.23.23.0/24 [90/20514560] via 13.13.13.2, 00:00:17, FastEthernet0/0

D 192.168.0.0/22 [90/30720] via 13.13.13.2, 00:00:17, FastEthernet0/0 //可见进行了路由汇总

再查看R3路由表，

R3#sh ip route

Gateway of last resort is not set

1.0.0.0/8 is variably subnetted, 2 subnets, 2 masks

D 1.0.0.0/8 is a summary, 00:52:20, Null0

D 1.1.1.1/32 [90/156160] via 13.13.13.1, 00:00:41, FastEthernet0/0

2.0.0.0/8 is variably subnetted, 2 subnets, 2 masks

D 2.0.0.0/8 is a summary, 00:52:20, Null0

D 2.2.2.2/32 [90/20640000] via 23.23.23.1, 00:00:42, Serial1/1

3.0.0.0/8 is variably subnetted, 2 subnets, 2 masks

D 3.0.0.0/8 is a summary, 00:52:36, Null0

C 3.3.3.3/32 is directly connected, Loopback0

12.0.0.0/8 is variably subnetted, 2 subnets, 2 masks

D 12.0.0.0/8 is a summary, 00:52:20, Null0

D 12.12.12.0/24 [90/20514560] via 13.13.13.1, 00:00:41, FastEthernet0/0

13.0.0.0/8 is variably subnetted, 2 subnets, 2 masks

D 13.0.0.0/8 is a summary, 00:52:20, Null0

C 13.13.13.0/24 is directly connected, FastEthernet0/0

23.0.0.0/8 is variably subnetted, 2 subnets, 2 masks

D 23.0.0.0/8 is a summary, 00:52:23, Null0

C 23.23.23.0/24 is directly connected, Serial1/1

192.168.0.0/24 is variably subnetted, 2 subnets, 2 masks

D 192.168.0.0/22 is a summary, 00:00:45, Null0

//由于路由汇总很容易产生环路，这里发布一条汇总指向null 0口，防止环路

C 192.168.0.0/24 is directly connected, Loopback1

C 192.168.1.0/24 is directly connected, Loopback2

C 192.168.2.0/24 is directly connected, Loopback3

C 192.168.3.0/24 is directly connected, Loopback4

实验结束。

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