BSCI—1:配置EIGRP的手動彙總

 BSCI—1:配置EIGRP的手動彙總


 
 
手動彙總特色:
1. 減小路由條目。
2. 減小正常數據的延時,
3. 佔用內存和 CPU 資源的減小。
4. 減小帶寬的佔用。
 
拓撲以下:
 
 
 
實驗:將R1上LoopBack 0,1,2三個接口地址彙總成一條路由
 
 
 
 
步驟一:首先我在 R1R2之間作好基本配置並啓用EIGRP發佈網段
 
R1
 
Router>
Router>en
Router#conf t
Router(config)#hostname R1
R1(config)#interface f0/0
R1(config-if)#ip address 192.168.1.1 255.255.255.0
R1(config-if)#no sh
R1(config)#interface loopback 0
R1(config-if)#ip address 172.16.1.1 255.255.255.0
R1(config-if)#int lo1
R1(config-if)#ip address 172.16.2.1 255.255.255.0
R1(config-if)#int lo2
R1(config-if)#ip address 172.16.3.1 255.255.255.0
R1(config-if)#exit
R1(config)#router eigrp 1
R1(config-router)#no auto-summary
R1(config-router)#network 192.168.1.0 0.0.0.255
R1(config-router)#network 172.16.1.0 0.0.0.255
R1(config-router)#network 172.16.2.0 0.0.0.255
R1(config-router)#network 172.16.3.0 0.0.0.255
R1(config-router)#end
R1#
 
 
 
 
 
R2
 
Router>
Router>en
Router#conf t
Router(config)#hostname R2
R2(config)#interface f0/0
R2(config-if)#ip address 192.168.1.2 255.255.255.0
R2(config-if)#no sh
R2(config-if)#exit
R2(config)#router eigrp 1
R2(config-router)#network 192.168.1.0 0.0.0.255
R2(config-router)#end
R2#
 
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
 
Gateway of last resort is not set
 
     172.16.0.0/24 is subnetted, 3 subnets
D       172.16.1.0 [90/156160] via 192.168.1.1, 00:00:17, FastEthernet0/0
D       172.16.2.0 [90/156160] via 192.168.1.1, 00:00:17, FastEthernet0/0
D       172.16.3.0 [90/156160] via 192.168.1.1, 00:00:17, FastEthernet0/0
C    192.168.1.0/24 is directly connected, FastEthernet0/0
R2#
 
注: 在R2上面咱們能夠很清楚的看見從R1上面學到的3條明細路由.
 
 
 
 
 
 
步驟二:當咱們在 R1 接口下作手工總彙總以後的變化 .
 
 
R1
 
R1(config-if)#ip summary-address eigrp 1 172.16.0.0 255.255.252.0
// 這個時候我把以前 3 個不一樣網段的條目彙總爲掩碼爲: 255.255.252.0 的網段
R1(config-if)#end
R1#
 
 
注:如今咱們來看下R2的變化.  
 
 
 
 
 
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
 
     172.16.0.0/22 is subnetted, 1 subnets
D       172.16.0.0 [90/156160] via 192.168.1.1, 00:01:52, FastEthernet0/0
C    192.168.1.0/24 is directly connected, FastEthernet0/0
R2#
 
注:以以前相比能夠看到如今學過來的是在R1 上彙總以後的路由,它的掩碼長度爲/22 ,也就是我剛剛手動輸入的子網掩碼 .
 
 
總結:
 
這樣作在針對連續在子網,有很大的改善,經過減小路由表的條目來節約咱們的硬件資源以及網絡帶寬.
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