今天接着来

基本配置依旧以附件形式发上来

步骤1:全网配置EIGRP实现互通。

实现目的:R1可以看到22、33、77开头路由各7条,44开头路由15条144开头路由各16条。

R1:router eigrp 100
 redistribute static
 offset-list off in 10 Serial0/0
 network 1.1.1.1 0.0.0.0
 network 12.1.1.1 0.0.0.0
 network 14.1.1.1 0.0.0.0
 network 17.1.1.1 0.0.0.0
 no auto-summary

R2:router eigrp 100
 network 2.2.2.2 0.0.0.0
 network 12.1.1.2 0.0.0.0
 network 22.1.0.0 0.0.7.255
 network 23.1.1.2 0.0.0.0
 no auto-summary

R3:router eigrp 100
  network 3.3.3.3 0.0.0.0
 network 23.1.1.3 0.0.0.0
 network 33.1.0.0 0.0.7.255
 network 37.1.1.3 0.0.0.0
 no auto-summary
 

R4:router eigrp 100
 network 4.4.4.4 0.0.0.0
 network 14.1.1.4 0.0.0.0
 network 44.1.0.0 0.0.15.255
 network 144.1.16.0 0.0.15.255
 no auto-summary

R7:router eigrp 100
 network 7.7.7.7 0.0.0.0
 network 17.1.1.7 0.0.0.0
 network 37.1.1.7 0.0.0.0
 network 77.1.0.0 0.0.7.255
 no auto-summary

结果:

 

步骤2:在R2、3、4、7配置汇总,向邻居发送汇总路由,R2汇总时同时发送一条22.1.7.0/24的明细路由到邻居。

R2:

ip access-list standard leak
 permit 22.1.7.0 0.0.0.255 发送到邻居的明细路由

interface Serial0/0
 ip summary-address eigrp 100 22.1.0.0 255.255.248.0 5 leak-map leak 手工汇总
 interface Serial0/1
 ip summary-address eigrp 100 22.1.0.0 255.255.248.0 5 leak-map leak
 

R3:

interface Serial0/0
 ip summary-address eigrp 100 33.1.0.0 255.255.248.0 5

interface Serial0/1
 ip summary-address eigrp 100 33.1.0.0 255.255.248.0 5

R4:

interface FastEthernet0/0
 ip summary-address eigrp 100 144.1.16.0 255.255.240.0 

 ip summary-address eigrp 100 44.1.0.0 255.255.240.0

R7:

interface Serial0/1
 ip summary-address eigrp 100 77.1.0.0 255.255.248.0
 

步骤3:使用offset list实现路径控制。网络在正常情况下R7到达除了R3以外的网络,流量从链路1通过,R3到达除了R7以为的网络流量有链路2通过。

R3:

ip access-list standard off
 permit 4.4.4.4
 permit 0.0.0.0
 permit 1.1.1.1
 permit 44.1.0.0 0.0.15.255
 permit 144.1.16.0 0.0.15.255
 permit 14.1.1.0 0.0.0.255   

router eigrp 100

offset-list off in 100 Serial0/1

R2:

ip access-list standard off
permit 7.7.7.7
permit 77.1.0.0 0.0.7.255

router eigrp 100

offset-list off in 100 Serial0/1

R1:

ip access-list standard off
 permit 3.3.3.3
 permit 33.1.0.0 0.0.7.255

router eigrp 100
offset-list off in 10 Serial0/1

R7:

ip access-list standard off
 permit 2.2.2.2
 permit 22.1.0.0 0.0.7.255

router eigrp 100
offset-list off in 100 Serial0/1 

 

 

 

步骤4:

配置EIGRP自动分发默认路由

R1配置到R4lo口的默认路由,再配置EIGRP通告默认路由,保证R2、3、7有默认路由能ping通R4lo口,不允许默认路由通告给R4。

R1:

ip access-list standard norouter
 deny   0.0.0.0
 permit any                    

router eigrp 100

redistribute static

distribute-list norouter out FastEthernet0/0  

 

步骤5:配置R3、7作为eigrp stup路由器,只发生直连和汇总路由,当链路1或2任意一条失败都能与全网通信。

R3:

ip access-list standard tor2
 permit 7.7.7.7
 permit 77.1.0.0
ip access-list standard tor7
 permit any

route-map stub permit 10
 match ip address tor7
 set interface Serial0/0
route-map stub permit 20
 match ip address tor2
 set interface Serial0/1

router eigrp 100

eigrp stub connected summary leak-map stub

R7:

ip access-list standard tor1
 permit 3.3.3.3
 permit 33.1.0.0 0.0.7.255
ip access-list standard tor3
 permit any

route-map stub permit 10
 match ip address tor1
 set interface Serial0/0
!
route-map stub permit 20
 match ip address tor3
 set interface Serial0/1

router eigrp 100

eigrp stub connected summary leak-map stub