默认路由试验(三)

Ospf 

P1 R1:

P1R1(config)#ip route 0.0.0.0 0.0.0.0 s1/0  

P1R1(config-router)#default-information originate

 

P1r1 route table

 

P1R1#

*Mar  1 00:22:52.363: %SYS-5-CONFIG_I: Configured from console by console

P1R1#show ip route

Codes: C - connected, S - static, 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

       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 0.0.0.0 to network 0.0.0.0

 

     172.31.0.0/24 is subnetted, 1 subnets

C       172.31.1.0 is directly connected, Serial1/0

     10.0.0.0/24 is subnetted, 3 subnets

O       10.1.2.0 [110/65] via 10.1.0.2, 00:02:14, Serial1/1

C       10.1.1.0 is directly connected, FastEthernet0/0

C       10.1.0.0 is directly connected, Serial1/1

S*   0.0.0.0/0 is directly connected, Serial1/0

P1R1#

  

P1R2 route table

 

P1R2#show ip route

Codes: C - connected, S - static, 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

       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 10.1.0.1 to network 0.0.0.0

 

     172.31.0.0/24 is subnetted, 1 subnets

O       172.31.1.0 [110/128] via 10.1.0.1, 00:00:05, Serial1/1

     10.0.0.0/24 is subnetted, 3 subnets

C       10.1.2.0 is directly connected, FastEthernet0/0

O       10.1.1.0 [110/65] via 10.1.0.1, 00:00:05, Serial1/1

C       10.1.0.0 is directly connected, Serial1/1

O*E2 0.0.0.0/0 [110/1] via 10.1.0.1, 00:00:05, Serial1/1

P1R2#

现在其中一台ROUTE中通告一个默认路由

通过Default-information origiate传播到外地的路由表中！

 

 

 

P1R4

P1R4#show ip route

Codes: C - connected, S - static, 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

       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 10.1.2.2 to network 0.0.0.0

 

     172.31.0.0/24 is subnetted, 1 subnets

O       172.31.1.0 [110/129] via 10.1.2.2, 00:06:30, FastEthernet0/0

     10.0.0.0/24 is subnetted, 3 subnets

C       10.1.2.0 is directly connected, FastEthernet0/0

O       10.1.1.0 [110/66] via 10.1.2.2, 00:06:30, FastEthernet0/0

O       10.1.0.0 [110/65] via 10.1.2.2, 00:06:30, FastEthernet0/0

O*E2 0.0.0.0/0 [110/1] via 10.1.2.2, 00:06:30, FastEthernet0/0

P1R4#

 

Default metric 是1 而不是BSCI自学指南P212上说的 10  书的作者已经试验验证了！