54-高级路由：重分发特性：单点重分发路由反馈

Posted 2020-12-02

一、实验拓扑：

二、实验要求：
在R1上将EIGRP 90 重分发进OSPF 110，再将OSPF重分发进RIP，查看R2、R3、R4路由表将收到哪些路由条目？
三、命令部署：
R1(config)#router ospf 110
R1(config-router)#redistribute eigrp 90 subnets

R1(config)#router rip
R1(config-router)#redistribute ospf 110 metric 10

R1(config)#router eigrp 90
R1(config-router)#redistribute rip metric 100000 10 255 1 1500

四、验证：
结论：单点重分发不会有路由反馈
R2#show ip route
2.0.0.0/24 is subnetted, 1 subnets
C 2.2.2.0 is directly connected, Loopback0
R 4.0.0.0/8 [120/11] via 12.1.1.1, 00:00:07, FastEthernet0/0
12.0.0.0/24 is subnetted, 1 subnets
C 12.1.1.0 is directly connected, FastEthernet0/0
R 14.0.0.0/8 [120/11] via 12.1.1.1, 00:00:07, FastEthernet0/0
Note：只有OSPF重分发进来的路由，并且打了R标签。

R3#show ip route
D EX 2.0.0.0/8 [170/30720] via 13.1.1.1, 00:00:44, FastEthernet0/0
3.0.0.0/8 is variably subnetted, 2 subnets, 2 masks
C 3.3.3.0/24 is directly connected, Loopback0
D 3.0.0.0/8 is a summary, 00:02:21, Null0
12.0.0.0/24 is subnetted, 1 subnets
D EX 12.1.1.0 [170/30720] via 13.1.1.1, 00:00:44, FastEthernet0/0
13.0.0.0/8 is variably subnetted, 2 subnets, 2 masks
C 13.1.1.0/24 is directly connected, FastEthernet0/0
D 13.0.0.0/8 is a summary, 00:02:21, Null0
Note：只有RIP重分发进来的路由，并且打了D EX标签。

R4#show ip route
O E2 3.0.0.0/8 [110/20] via 14.1.1.1, 00:03:23, Serial2/0
4.0.0.0/24 is subnetted, 1 subnets
C 4.4.4.0 is directly connected, Loopback0
13.0.0.0/24 is subnetted, 1 subnets
O E2 13.1.1.0 [110/20] via 14.1.1.1, 00:03:23, Serial2/0
14.0.0.0/24 is subnetted, 1 subnets
C 14.1.1.0 is directly connected, Serial2/0
Note：只有EIGRP重分发进来的路由，并且打了O E2标签。