EIGRP的基本配置

1、? 實驗目的：

通過本次的實驗，我們可以掌握如下技能：

1)??????? 在路由器上啟用EIGRP路由進程

2)??????? 啟用參與路由協議的借口，并且通告網絡

3)??????? EIGRP度量值的計算

4)??????? 可行距離（FD）、通告距離（RD）、以及可行性條件（FC）

5)??????? 臨界表、拓撲表及其路由表的含義

6)??????? 查看和調試EIGRP路由協議相關信息

2、? 實驗拓撲圖：

3、? 實驗步驟：

（1）?????? 根據網絡拓撲，配置各個接口地址

R1(config-if)#interface loopback 0

R1(config-if)#ip ad

R1(config-if)#ip address 1.1.1.1 255.255.255.0

R1(config-if)#no sh

R1(config-if)#no shutdown

R1(config-if)#exit

R1(config)#interface serial 2/0

R1(config-if)#ip ad

R1(config-if)#ip address 192.168.1.1 255.255.255.252

R1(config-if)#cl

R1(config-if)#clock r

R1(config-if)#clock rate 128000

R1(config-if)#no sh

R1(config-if)#no shutdown

R1(config-if)#exit

R1(config)#

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Router>en

Router#conf t

Enter configuration commands, one per line.? End with CNTL/Z.

Router(config)#hos

Router(config)#hostname R2

R2(config)#int

R2(config)#interface s

R2(config)#interface serial 2/0

R2(config-if)#ip ad

R2(config-if)#ip address 192.168.1.2 255.255.255.252

R2(config-if)#no sh

R2(config-if)#no shutdown

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%LINK-5-CHANGED: Interface Serial2/0, changed state to up

R2(config-if)#exit

R2(config)#int

R2(config)#interface se

R2(config)#interface serial 3/0

R2(config-if)#clock r

R2(config-if)#clock rate 128000

R2(config-if)#ip ad

R2(config-if)#ip address 192.168.2.1 255.255.255.252

R2(config-if)#no sh

R2(config-if)#no shutdown

R2(config-if)#exit

R2(config)#

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Router(config)#hostname R3

R3(config)#int

R3(config)#interface s

R3(config)#interface serial 3/0

R3(config-if)#ipa d

R3(config-if)#ip ad

R3(config-if)#ip address 192.168.2.2 255.255.255.252

R3(config-if)#no sh

R3(config-if)#no shutdown

R3(config)#interface s

R3(config)#interface serial 2/0

R3(config-if)#ip address 192.168.3.1 255.255.255.252

R3(config-if)#cl

R3(config-if)#clock r

R3(config-if)#clock rate 128000

R3(config-if)#no sh

R3(config-if)#no shutdown

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R3(config-if)#exit

R3(config)#

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R4(config-if)#interface loopback 0

R4(config-if)#ip ad

R4(config-if)#ip address 4.4.4.4 255.255.255.0

R4(config-if)#no sh

R4(config-if)#no shutdown

R4(config-if)#exit

R4(config)#inr

R4(config)#int

R4(config)#interface s

R4(config)#interface serial 2/0

R4(config-if)#ip ad

R4(config-if)#ip address 192.168.3.2 255.255.255.252

R4(config-if)#no shutdown

（2）?????? 啟用EIGRP路由協議，并將網絡發布出去

R1(config)#router eigrp 1

R1(config-router)#no au

R1(config-router)#no auto-summary

R1(config-router)#network 1.1.1.0 0.0.0.255

R1(config-router)#network 192.168.1.0

R1(config-router)#

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R2(config)#router eigrp 1

R2(config-router)#no auto-summary

R2(config-router)#network 192.168.1.0

R2(config-router)#network 192.168.2.0

R2(config-router)#

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R3(config)#router eigrp 1

R3(config-router)#no auto-summary

R3(config-router)#network 192.168.2.0

R3(config-router)#network 192.168.2.0

R3(config-router)#net

R3(config-router)#network 192.168.3.0

R3(config-router)#

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R4(config)#router eigrp 1

R4(config-router)#ne

R4(config-router)#network 4.4.4.0 0.0.0.255

R4(config-router)#network 192.168.3.0

R4(config-router)#

（3）?????? 測試網絡情況

查看路由表：

R2#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

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Gateway of last resort is not set

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???? 1.0.0.0/24 is subnetted, 1 subnets

D?????? 1.1.1.0 [90/20640000] via 192.168.1.1, 00:03:28, Serial2/0

D??? 4.0.0.0/8 [90/21152000] via 192.168.2.2, 00:01:56, Serial3/0

C??? 192.168.1.0/24 is directly connected, Serial2/0

C? ? 192.168.2.0/24 is directly connected, Serial3/0

D??? 192.168.3.0/24 [90/21024000] via 192.168.2.2, 00:02:33, Serial3/0

R2#

?? 以上的輸出可以看出，路由器R2通過EIGRP路由協議學習到了3條路由條目，管理距離是90。注意：EIGRP協議代碼用字母“D”表示。

對于EIGRP度量值的計算，不妨以“D?????? 1.1.1.0 [90/20640000] via 192.168.1.1, 00:03:28, Serial2/0”條目來說明。

EIGRP度量值的計算公式是[K1*Bandwidth+(K2*Bandwidth)/(256-load)+K3*delay]*[K5/(reliability+K4)]*256

在默認的情況下，K1=K3=1，K2=K4=K5=0

Band>所經由鏈路中的入口帶寬的最小值。

Delay=所經由鏈路中入口的延遲之和/10

所以本路由條目的度量值應該是[10^7/128+(5000+20000)/10]*256=2064000和路由器計算的結果是一樣的。

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查看路由協議

R2#show ip protocols

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Routing Protocol is "eigrp? 1 "

? 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

//顯示計算度量值所用的K值

? EIGRP maximum hopcount 100

//EIGRP支持的最大跳數

? EIGRP maximum metric variance 1

//variance默認值是1，即默認支持等價路徑的負載均衡

Redistributing: eigrp 1

? Automatic network summarization is not in effect?

//顯示自動匯總已經關閉，默認自動匯總的開啟的

? Maximum path: 4

? Routing for Networks:?

???? 192.168.1.0

???? 192.168.2.0

? Routing Information Sources:?

??? Gateway???????? Distance????? Last Update

??? 192.168.1.1???? 90??????????? 821438????

??? 192.168.2.2???? 90??????????? 867625????

? Distance: internal 90 external 170

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R2#

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查看EIGRP鄰居信息

R2#show ip eigrp neighbors

IP-EIGRP neighbors for process 1

H?? Address???????? Interface????? Hold Uptime??? SRTT?? RTO?? Q?? Seq

?????????? ??????????????????????? (sec)????????? (ms)??????? Cnt? Num

0?? 192.168.1.1???? Se2/0????????? 11?? 00:17:49? 40???? 1000? 0?? 7

1?? 192.168.2.2???? Se3/0????????? 11?? 00:17:03? 40???? 1000? 0?? 9

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R2#

以上可以顯示了鄰居的信息，有鄰居接口地址，從鄰接關系建立到目前的時間等信息。

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Show ip eigrp toplogy

R2#show ip eigrp topology

IP-EIGRP Topology Table for AS 1

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

?????? r - Reply status

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P 192.168.1.0/24, 1 successors, FD is 20512000

???????? via Connected, Serial2/0

P 1.1.1.0/24, 1 successors, FD is 20640000

???????? via 192.168.1.1 (20640000/128256), Serial2/0

P 192.168.2.0/24, 1 successors, FD is 20512000

???????? via Connected, Serial3/0

P 192.168.3.0/24, 1 successors, FD is 21024000

???????? via 192.168.2.2 (21024000/20512000), Serial3/0

P 4.0.0.0/8, 1 successors, FD is 21152000

???????? via 192.168.2.2 (21152000/20640000), Serial3/0

R2#

以上的輸出可以看出每條路由條碼的FD和RD的值。

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R1#show ip eigrp traffic

IP-EIGRP Traffic Statistics for process 1

? Hellos sent/received: 795/307

? Updates sent/received: 4/5

? Queries sent/received: 0/0

? Replies sent/received:? 0/0

? Acks sent/received:? 5/4

? Input queue high water mark 1, 0 drops

? SIA-Queries sent/received: 0/0

? SIA-Replies sent/received: 0/0

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R1#

以上可以看出EIRP發送和接收到的數據包的統計情況。

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（4）?????? 注入默認路由

在路由器R1上使用“IP default-network”可以向EIGRP網絡中注入一條默認路由，具體配置如下：

R1(config-if)#interface loopback 1

R1(config-if)#ip address 192.168.5.1 255.255.255.0

R1(config)#router eigrp 1

R1(config-router)#ne

R1(config-router)#network 192.168.5.0 0.0.0.255

R1(config-router)#exit

R1(config)#ip de

R1(config)#ip default-network 192.168.5.0

R1(config)#

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查看R2的路由條目

R2#show ip ro

R2#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

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Gateway of last resort is 192.168.1.1 to network 192.168.5.0

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???? 1.0.0.0/24 is subnetted, 1 subnets

D?????? 1.1.1.0 [90/20640000] via 192.168.1.1, 00:29:13, Serial2/0

D??? 4.0.0.0/8 [90/21152000] via 192.168.2.2, 00:27:41, Serial3/0

C??? 192.168.1.0/24 is directly connected, Serial2/0

C??? 192.168.2.0/24 is directly connected, Serial3/0

D??? 192.168.3.0/24 [90/21024000] via 192.168.2.2, 00:28:18, Serial3/0

D*?? 192.168.5.0/24 [90/20640000] via 192.168.1.1, 00:00:56, Serial2/0

R2#

以上的輸出表明R2已經收到了一條默認的路由，同樣R3和R4也同樣可以收到。。

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OK 實驗到此結束！！！！！！！

轉載于:https://blog.51cto.com/lorna8023/240460

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