R6(config-router)#redistribute static % Only classful networks will be redistributed   !!不加上subnets只重发布classful路由 记录如下： 拓扑： R4 s1/1-->s1/0 R5 s1/1 -->s1/0 R6 R6(config-router)#do sh run  Building configuration... Current configuration : 1335 bytes ! version 12.3 service timestamps debug datetime msec service timestamps log datetime msec no service password-encryption ! hostname R6 ! boot-start-marker boot-end-marker ! ! no aaa new-model ip subnet-zero ! ! ! ip cef ! ! ! !         ! ! ! ! ! ! ! ! ! ! ! interface FastEthernet0/0  no ip address  shutdown  duplex half ! interface Serial1/0  ip address 192.168.224.2 255.255.255.0  serial restart-delay 0 ! interface Serial1/1  no ip address  shutdown  serial restart-delay 0 ! interface Serial1/2  no ip address  shutdown  serial restart-delay 0 ! interface Serial1/3  no ip address  shutdown  serial restart-delay 0 ! interface Serial2/0  no ip address  shutdown  serial restart-delay 0 ! interface Serial2/1  no ip address  shutdown  serial restart-delay 0 ! interface Serial2/2  no ip address  shutdown  serial restart-delay 0 ! interface Serial2/3  no ip address  shutdown  serial restart-delay 0 ! router ospf 100  log-adjacency-changes  redistribute static    （默认情况下，OPPF使用E2类型的LSA，不计算AS内部路径所带来的COST值）  network 192.168.224.0 0.0.0.255 area 51 ! ip classless  （将静态路由指向空接口） ip route 192.168.240.0 255.255.255.0 Null0

ip route 192.168.244.0 255.255.255.0 Null0

ip route 192.168.248.0 255.255.255.0 Null0

ip route 192.168.252.0 255.255.255.0 Null0 no ip http server 邻居路由器所学到的路径信息如下： R5#sh 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 not set C    192.168.224.0/24 is directly connected, Serial1/1 O E2 192.168.240.0/24 [110/20] via 192.168.224.2, 00:05:55, Serial1/1 O E2 192.168.244.0/24 [110/20] via 192.168.224.2, 00:05:55, Serial1/1 O E2 192.168.248.0/24 [110/20] via 192.168.224.2, 00:05:55, Serial1/1 C    192.168.1.0/24 is directly connected, Serial1/0 O E2 192.168.252.0/24 [110/20] via 192.168.224.2, 00:05:55, Serial1/1 C    192.168.3.0/24 is directly connected, Loopback0 O IA 192.168.64.0/18 [110/65] via 192.168.1.1, 00:05:55, Serial1/0 R4#sh 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 not set O IA 192.168.224.0/24 [110/128] via 192.168.1.3, 00:11:52, Serial1/1 O E2 192.168.240.0/24 [110/20] via 192.168.1.3, 00:06:06, Serial1/1 O E2 192.168.244.0/24 [110/20] via 192.168.1.3, 00:06:06, Serial1/1 C    192.168.64.0/24 is directly connected, Loopback0      9.0.0.0/24 is subnetted, 1 subnets C       9.0.0.0 is directly connected, Loopback5 C    192.168.80.0/24 is directly connected, Loopback1 C    192.168.96.0/24 is directly connected, Loopback2 O E2 192.168.248.0/24 [110/20] via 192.168.1.3, 00:06:06, Serial1/1 C    192.168.112.0/24 is directly connected, Loopback3 C    192.168.1.0/24 is directly connected, Serial1/1 O E2 192.168.252.0/24 [110/20] via 192.168.1.3, 00:06:06, Serial1/1      192.168.3.0/32 is subnetted, 1 subnets O       192.168.3.1 [110/65] via 192.168.1.3, 00:11:53, Serial1/1 O    192.168.64.0/18 is a summary, 00:12:03, Null0 R6(config-router)#redistribute static metric-type 1 % Only classful networks will be redistributed R5#sh 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 not set C    192.168.224.0/24 is directly connected, Serial1/1 O E1 192.168.240.0/24 [110/84] via 192.168.224.2, 00:01:44, Serial1/1 O E1 192.168.244.0/24 [110/84] via 192.168.224.2, 00:01:44, Serial1/1 O E1 192.168.248.0/24 [110/84] via 192.168.224.2, 00:01:44, Serial1/1 C    192.168.1.0/24 is directly connected, Serial1/0 O E1 192.168.252.0/24 [110/84] via 192.168.224.2, 00:01:44, Serial1/1 C    192.168.3.0/24 is directly connected, Loopback0 O IA 192.168.64.0/18 [110/65] via 192.168.1.1, 00:08:19, Serial1/0 R4#sh 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 not set O IA 192.168.224.0/24 [110/128] via 192.168.1.3, 00:14:54, Serial1/1 O E1 192.168.240.0/24 [110/148] via 192.168.1.3, 00:02:37, Serial1/1 O E1 192.168.244.0/24 [110/148] via 192.168.1.3, 00:02:37, Serial1/1 C    192.168.64.0/24 is directly connected, Loopback0      9.0.0.0/24 is subnetted, 1 subnets C       9.0.0.0 is directly connected, Loopback5 C    192.168.80.0/24 is directly connected, Loopback1 C    192.168.96.0/24 is directly connected, Loopback2 O E1 192.168.248.0/24 [110/148] via 192.168.1.3, 00:02:37, Serial1/1 C    192.168.112.0/24 is directly connected, Loopback3 C    192.168.1.0/24 is directly connected, Serial1/1 O E1 192.168.252.0/24 [110/148] via 192.168.1.3, 00:02:37, Serial1/1      192.168.3.0/32 is subnetted, 1 subnets O       192.168.3.1 [110/65] via 192.168.1.3, 00:14:55, Serial1/1 O    192.168.64.0/18 is a summary, 00:15:05, Null0