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解析EIGRP浮动路由配置

时间:2017-05-10 11:12:06 网络技术 我要投稿

解析EIGRP浮动汇总路由配置

  EIGRP协议在路由计算中要对网络带宽、网络时延、信道占用率和信道可信度等因素作全面的综合考虑,所以EIGRP的路由计算更为准确,更能反映网络的实际情况,下面跟小编看一下EIGRP浮动汇总路由配置过程。

  EIGRP浮动汇总路由配置过程如下:

  EIGRP浮动汇总路由配置之拓扑图

  实例解析EIGRP浮动汇总路由配置

  EIGRP浮动汇总路由配置之接口连接

  Router1 S0/0 <----> Router2 S0/0

  Router2 S0/1 <----> Router3 S0/0

  Router1 S0/1 <----> Router4 S0/0

  Router3 S0/1 <----> Router4 S0/1

  VPCS V0/1 <----> Router1 E1/0

  VPCS V0/2 <----> Router3 E1/0

  EIGRP浮动汇总路由配置之原理

  在R1\R2\R3\R4上均运行EIGRP路由协议。R4通过S0/1向R3通告一条0.0.0.0 0.0.0.0的汇总路由,并将这条浮动路由的管理距离设置为250,于是在网络连通的情况下R3上到达200.1.1.0/24网段的路由经过R2,而在R2与R3链路故障的时候,通过R3前往200.1.1.0/24的数据包会通过R4(R3拓扑表中,默认路由由A变为P)

  EIGRP浮动汇总路由配置之关键配置

  R1:

  interface Serial0/0

  ip address 192.168.1.1 255.255.255.0

  serial restart-delay 0

  !

  interface Serial0/1

  ip address 192.168.3.1 255.255.255.0

  serial restart-delay 0

  !

  interface Ethernet1/0

  ip address 200.1.1.254 255.255.255.0

  half-duplex

  !

  router eigrp 100

  network 192.168.1.0

  network 192.168.3.0

  network 200.1.1.0

  no auto-summary

  R2、R3略,参照R1进行接口IP和路由协议的配置,重点看下R4的配置

  R4:

  interface Serial0/0

  ip address 192.168.3.2 255.255.255.0

  serial restart-delay 0

  !

  interface Serial0/1

  ip address 192.168.4.1 255.255.255.0

  ip summary-address eigrp 100 0.0.0.0 0.0.0.0 250(向R3通过默认路由,管理距离高于EIGRP默认值)!

  router eigrp 100

  network 192.168.3.0

  network 192.168.4.0

  auto-summary

  EIGRP浮动汇总路由配置之查看结果

  1.R2和R3之间链路正常时

  a) R3的'路由表:

  R3#sh 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, su - IS-IS summary, 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 192.168.4.1 to network 0.0.0.0

  D 200.1.1.0/24 [90/2707456] via 192.168.2.1, 00:00:02, Serial0/0

  C 200.1.2.0/24 is directly connected, Ethernet1/0

  C 192.168.4.0/24 is directly connected, Serial0/1

  D 192.168.1.0/24 [90/2681856] via 192.168.2.1, 00:00:02, Serial0/0

  C 192.168.2.0/24 is directly connected, Serial0/0

  D 192.168.3.0/24 [90/3193856] via 192.168.2.1, 00:00:02, Serial0/0

  D* 0.0.0.0/0 [90/2681856] via 192.168.4.1, 00:00:00, Serial0/1

  b)R3的拓扑表:

  R3#sh ip eigrp topology

  IP-EIGRP Topology Table for AS(100)/ID(200.1.2.254)

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

  r - reply Status, s - sia Status

  A 0.0.0.0/0, 1 successors, FD is Inaccessible

  1 replies, active 00:00:00, query-origin: Successor Origin

  Remaining replies:

  via 192.168.2.1, r, Serial0/0

  P 192.168.1.0/24, 1 successors, FD is 2681856

  via 192.168.2.1 (2681856/2169856), Serial0/0

  P 192.168.2.0/24, 1 successors, FD is 2169856

  via Connected, Serial0/0

  P 192.168.3.0/24, 1 successors, FD is 3193856

  via 192.168.2.1 (3193856/2681856), Serial0/0

  P 192.168.4.0/24, 1 successors, FD is 2169856

  via Connected, Serial0/1

  P 200.1.1.0/24, 1 successors, FD is 2707456

  via 192.168.2.1 (2707456/2195456), Serial0/0

  P 200.1.2.0/24, 1 successors, FD is 281600

  via Connected, Ethernet1/0

  2.R2的S0/1设置为DOWN,观察R3路由表和拓扑表

  a)R3路由表:

  R3#sh 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, su - IS-IS summary, 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 192.168.4.1 to network 0.0.0.0

  C 200.1.2.0/24 is directly connected, Ethernet1/0

  C 192.168.4.0/24 is directly connected, Serial0/1

  C 192.168.2.0/24 is directly connected, Serial0/0

  D* 0.0.0.0/0 [90/2681856] via 192.168.4.1, 00:00:05, Serial0/1

  b)R3的拓扑表:

  R3#sh ip eigrp topology

  IP-EIGRP Topology Table for AS(100)/ID(200.1.2.254)

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

  r - reply Status, s - sia Status

  P 0.0.0.0/0, 1 successors, FD is 2681856

  via 192.168.4.1 (2681856/2169856), Serial0/1

  P 192.168.4.0/24, 1 successors, FD is 2169856

  via Connected, Serial0/1

  P 200.1.2.0/24, 1 successors, FD is 281600

  via Connected, Ethernet1/0

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