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分类: 系统运维

2007-02-07 08:35:36

  ospf四种区域类型分析-total nssa
 

 

各路由器的配置如上图,外部路由均注入ospf

area23为普通区域时,R1R2R3的路由表中有所有网段的路由

Area23配置为total nssa区域时

R2router eigrp 50

 network 25.0.0.0

 auto-summary

!

router ospf 1

 router-id 2.2.2.2

 log-adjacency-changes

 area 23 nssa no-summary

 redistribute eigrp 50 subnets

 network 12.12.12.0 0.0.0.255 area 0

 network 23.23.23.0 0.0.0.255 area 23

R3router ospf 1

 router-id 3.3.3.3

 log-adjacency-changes

 area 23 nssa

 redistribute rip subnets

 network 23.23.23.0 0.0.0.255 area 23

!

router rip

 version 2

 passive-interface Serial1/2

 network 34.0.0.0

注意观察R1R2R3的路由表

R1     34.0.0.0/24 is subnetted, 1 subnets

O E2    34.34.34.0 [110/20] via 12.12.12.2, 00:01:41, Serial1/0 nssa产生类型7转换5通告路由

     1.0.0.0/32 is subnetted, 1 subnets

C       1.1.1.1 is directly connected, Loopback1

     50.0.0.0/32 is subnetted, 1 subnets

O E2    50.50.50.5 [110/20] via 12.12.12.2, 00:02:05, Serial1/0 nssa产生类型7转换5通告路由

              156.26.0.0/24 is subnetted, 2 subnets

O E2    156.26.32.0 [110/20] via 12.12.12.2, 00:01:41, Serial1/0 nssa产生类型7转换5通告路由

O E2    156.26.33.0 [110/20] via 12.12.12.2, 00:01:41, Serial1/0 nssa产生类型7转换5通告路由

              23.0.0.0/24 is subnetted, 1 subnets

O IA    23.23.23.0 [110/128] via 12.12.12.2, 00:07:03, Serial1/0区域间类型3LSA通告路由

              25.0.0.0/24 is subnetted, 1 subnets

O E2    25.25.25.0 [110/20] via 12.12.12.2, 00:02:05, Serial1/0 nssa产生类型7转换5通告路由

     12.0.0.0/24 is subnetted, 1 subnets

C       12.12.12.0 is directly connected, Serial1/0

----------------------------------------------------------------------------------------------------------------------------------

R2     34.0.0.0/24 is subnetted, 1 subnets

O N2    34.34.34.0 [110/20] via 23.23.23.3, 00:03:20, Serial1/0 nssa产生类型7通告路由

              1.0.0.0/32 is subnetted, 1 subnets

O E2    1.1.1.1 [110/20] via 12.12.12.1, 00:03:20, Serial1/2 AS外部类型5LSA通告路由

              50.0.0.0/32 is subnetted, 1 subnets

D       50.50.50.5 [90/156160] via 25.25.25.5, 00:59:47, FastEthernet0/0

              156.26.0.0/24 is subnetted, 2 subnets

O N2    156.26.32.0 [110/20] via 23.23.23.3, 00:03:20, Serial1/0 nssa产生类型7通告路由

O N2    156.26.33.0 [110/20] via 23.23.23.3, 00:03:20, Serial1/0 nssa产生类型7通告路由

              23.0.0.0/24 is subnetted, 1 subnets

C       23.23.23.0 is directly connected, Serial1/0

              25.0.0.0/24 is subnetted, 1 subnets

C       25.25.25.0 is directly connected, FastEthernet0/0

              12.0.0.0/24 is subnetted, 1 subnets

C       12.12.12.0 is directly connected, Serial1/2

----------------------------------------------------------------------------------------------------------------------------------

R3                   34.0.0.0/24 is subnetted, 1 subnets

C       34.34.34.0 is directly connected, Serial1/0

              50.0.0.0/32 is subnetted, 1 subnets

O N2    50.50.50.5 [110/20] via 23.23.23.2, 01:07:47, Serial1/2 nssa产生类型7通告路由

               156.26.0.0/24 is subnetted, 2 subnets

R       156.26.32.0 [120/1] via 34.34.34.4, 00:00:06, Serial1/0

R       156.26.33.0 [120/1] via 34.34.34.4, 00:00:06, Serial1/0

              23.0.0.0/24 is subnetted, 1 subnets

C       23.23.23.0 is directly connected, Serial1/2

              25.0.0.0/24 is subnetted, 1 subnets

O N2    25.25.25.0 [110/20] via 23.23.23.2, 01:07:47, Serial1/2 nssa产生类型7通告路由

O*IA 0.0.0.0/0 [110/65] via 23.23.23.2, 00:05:20, Serial1/2 total nssa区域默认产生类型3缺省路由

注意此时没有了到12.0.0.0/24的区域间路由

Total nssa中只有缺省路由

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