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  • 解析EIGRP浮動路由配置

    時間:2024-11-03 11:15:56 網絡技術 我要投稿
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    解析EIGRP浮動匯總路由配置

      EIGRP協議在路由計算中要對網絡帶寬、網絡時延、信道占用率和信道可信度等因素作全面的綜合考慮,所以EIGRP的路由計算更為準確,更能反映網絡的實際情況,下面跟小編看一下EIGRP浮動匯總路由配置過程。

      EIGRP浮動匯總路由配置過程如下:

      EIGRP浮動匯總路由配置之拓撲圖

      實例解析EIGRP浮動匯總路由配置

      EIGRP浮動匯總路由配置之接口連接

      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浮動匯總路由配置之原理

      在R1\R2\R3\R4上均運行EIGRP路由協議。R4通過S0/1向R3通告一條0.0.0.0 0.0.0.0的匯總路由,并將這條浮動路由的管理距離設置為250,于是在網絡連通的情況下R3上到達200.1.1.0/24網段的路由經過R2,而在R2與R3鏈路故障的時候,通過R3前往200.1.1.0/24的數據包會通過R4(R3拓撲表中,默認路由由A變為P)

      EIGRP浮動匯總路由配置之關鍵配置

      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,參照R1進行接口IP和路由協議的配置,重點看下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通過默認路由,管理距離高于EIGRP默認值)!

      router eigrp 100

      network 192.168.3.0

      network 192.168.4.0

      auto-summary

      EIGRP浮動匯總路由配置之查看結果

      1.R2和R3之間鏈路正常時

      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的拓撲表:

      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設置為DOWN,觀察R3路由表和拓撲表

      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的拓撲表:

      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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