十二、EIGRP的手動彙總

十二、EIGRP的手動彙總

實驗目的：1、學習EIGRP路由協議手動彙總的配置。

               2、學習EIGRP路由協議手動彙總的意義。

實驗拓撲：

1、ip地址表：

R1              LO/0                 192.168.10.33/29

R1              LO/1                  192.168.10.41/29
R1              S2/0                  192.168.10.49/30
R2              S2/0                  192.168.10.50/30
R2              FO/0                  192.168.20.1/24

 

2、

R1的配置：

R1(config)#interface loopback 0

%LINK-5-CHANGED: Interface Loopback0, changed state to up
%LINEPROTO-5-UPDOWN: Line protocol on Interface Loopback0, changed state to up

R1(config-if)#ip address 192.168.10.33 255.255.255.248
R1(config-if)#exit
R1(config)#interface loopback 1

%LINK-5-CHANGED: Interface Loopback1, changed state to up
%LINEPROTO-5-UPDOWN: Line protocol on Interface Loopback1, changed state to upR1(config-if)#ip address 192.168.10.41 255.255.255.248
R1(config-if)#no shutdown
R1(config-if)#exit
R1(config)#interface serial 2/0
R1(config-if)#ip address 192.168.10.49 255.255.255.252
R1(config-if)#clock rate 64000//DCE端設置時鐘頻率爲64000
R1(config-if)#no shutdown

%LINK-5-CHANGED: Interface Serial2/0, changed state to down
R1(config-if)#exit
R1(config)#route eigrp 10//啓用eigrp路由協議，自治號爲10
R1(config-router)#network 192.168.10.0//通告直連網絡

 

R2的配置：

R2(config)#interface loopback 0

%LINK-5-CHANGED: Interface Loopback0, changed state to up
%LINEPROTO-5-UPDOWN: Line protocol on Interface Loopback0, changed state to upR2(config-if)#ip address 192.168.20.1 255.255.255.0
R2(config-if)#exit
R2(config)#interface serial 2/0
R2(config-if)#ip address 192.168.10.50 255.255.255.252
R2(config-if)#no shutdown

%LINK-5-CHANGED: Interface Serial2/0, changed state to up
R2(config-if)#
%LINEPROTO-5-UPDOWN: Line protocol on Interface Serial2/0, changed state to up
R2(config-if)#exit
R2(config)#route eigrp 10//啓用eigrp路由協議，自治號爲10
R2(config-router)#network 192.168.10.0//通告直連網絡

R2(config-router)#network 192.168.20.0

 

驗證：R1和R2的路由表信息分別如下

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

     192.168.10.0/24 is variably subnetted, 3 subnets, 2 masks
C       192.168.10.32/29 is directly connected, Loopback0
C       192.168.10.40/29 is directly connected, Loopback1
C       192.168.10.48/30 is directly connected, Serial2/0
D    192.168.20.0/24 [90/20640000] via 192.168.10.50, 00:00:09, Serial2/0

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

Gateway of last resort is not set

     192.168.10.0/24 is variably subnetted, 4 subnets, 3 masks
D       192.168.10.0/24 is a summary, 00:01:02, Null0
D       192.168.10.32/29 [90/20640000] via 192.168.10.49, 00:04:10, Serial2/0
D       192.168.10.40/29 [90/20640000] via 192.168.10.49, 00:04:10, Serial2/0
C       192.168.10.48/30 is directly connected, Serial2/0
C    192.168.20.0/24 is directly connected, Loopback0

R1和R2路由表可見都學到了所有的路由信息，但R2上彙總了空接口，取消R2上彙總的空接口如下

-----------

R1(config)#route eigrp 10
R1(config-router)#no auto-summary

R2(config)#route eigrp 10
R2(config-router)#no auto-summary

-----------

 

R2(config)#interface serial 2/0
R2(config-if)#ip summary-address eigrp 10 192.168.10.32 255.255.255.240//eigrp的手動彙總

 

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

Gateway of last resort is not set

     192.168.10.0/24 is variably subnetted, 3 subnets, 2 masks
D       192.168.10.32/28 [90/20640000] via 192.168.10.49, 00:00:15, Serial2/0
C       192.168.10.48/30 is directly connected, Serial2/0
C    192.168.20.0/24 is directly connected, Loopback0

結論：

1、可見eigrp路由協議手動彙總配置成功；

2、對比上面R2的輸出，兩個/29的子網被彙總了一個/28的子網通告出去，目的使得路由表的尺寸變小，從而節省了搜索路由表的時間。