配置RIPv2(Enabling Rip v2)

步骤一：配置各路由器的IP地址，并使用ping命令确认直连接口相互可以ping通。

步骤二：配置各路由器的RIP协议。

步骤三：在R1使用PING 172.16.2.1结果是不通的。

步骤四：解决步骤三的问题。解决的方法是：启用RIP V2的协议

R1(config)#router rip
R1(config-router)#version 2
R1(config-router)#exit

R2(config)#router rip
R2(config-router)#version 2
R2(config-router)#exit

R3(config)#router rip
R3(config-router)#version 2
R3(config-router)#exit

步骤五：观察R2的路由表

R2#show 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 not set

     172.16.0.0/16 is variably subnetted, 3 subnets, 2 masks
R       172.16.1.0/24 [120/1] via 172.16.3.1, 00:00:00, Serial1/1
R       172.16.2.0/27 [120/1] via 172.16.3.1, 00:00:00, Serial1/1
C       172.16.3.0/24 is directly connected, Serial1/1
     10.0.0.0/8 is variably subnetted, 3 subnets, 2 masks
R       10.2.2.0/27 [120/1] via 10.3.3.1, 00:00:00, Serial1/0
R       10.1.1.0/24 [120/1] via 10.3.3.1, 00:00:00, Serial1/0
C       10.3.3.0/24 is directly connected, Serial1/0

步骤六：使用DEBUG观察RIPV2的通告

R3#
00:06:36: RIP: sending v2 update to 224.0.0.9 via Serial1/0 (172.16.3.1)
00:06:36: RIP: build update entries
00:06:36:       172.16.1.0/24 via 0.0.0.0, metric 1, tag 0
00:06:36:       172.16.2.0/27 via 0.0.0.0, metric 1, tag 0
00:06:36: RIP: sending v2 update to 224.0.0.9 via Loopback0 (172.16.1.1)
00:06:36: RIP: build update entries
00:06:36:       10.0.0.0/8 via 0.0.0.0, metric 2, tag 0
00:06:36:       172.16.2.0/27 via 0.0.0.0, metric 1, tag 0
00:06:36:       172.16.3.0/24 via 0.0.0.0, metric 1, tag 0
00:06:36: RIP: sending v2 update to 224.0.0.9 via Loopback1 (172.16.2.1)
00:06:36: RIP: build update entries
00:06:36:       10.0.0.0/8 via 0.0.0.0, metric 2, tag 0
00:06:36:       172.16.1.0/24 via 0.0.0.0, metric 1, tag 0
00:06:36:       172.16.3.0/24 via 0.0.0.0, metric 1, tag 0
00:06:36: RIP: ignored v2 packet from 172.16.1.1 (sourced from one of our addresses)
00:06:36: RIP: ignored v2 packet from 172.16.2.1 (sourced from one of our addresses)
00:06:37: RIP: received v2 update from 172.16.3.2 on Serial1/0
00:06:37:      10.0.0.0/8 via 0.0.0.0 in 1 hops
R3#

步骤七：观察R1的路由表

R1#show 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 not set

R    172.16.0.0/16 [120/1] via 10.3.3.2, 00:00:06, Serial1/1
     10.0.0.0/8 is variably subnetted, 3 subnets, 2 masks
C       10.2.2.0/27 is directly connected, Loopback1
C       10.1.1.0/24 is directly connected, Loopback0
C       10.3.3.0/24 is directly connected, Serial1/1
R1#

步骤八：在R2上关闭自动汇总

R2(config)#router rip
R2(config-router)#no auto-summary
R2(config-router)#exit

步骤九：再次到R1上查看路由表

R1#show 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 not set

     172.16.0.0/16 is variably subnetted, 3 subnets, 2 masks
R       172.16.1.0/24 [120/2] via 10.3.3.2, 00:00:00, Serial1/1
R       172.16.2.0/27 [120/2] via 10.3.3.2, 00:00:00, Serial1/1
R       172.16.3.0/24 [120/1] via 10.3.3.2, 00:00:00, Serial1/1
     10.0.0.0/8 is variably subnetted, 3 subnets, 2 masks
C       10.2.2.0/27 is directly connected, Loopback1
C       10.1.1.0/24 is directly connected, Loopback0
C       10.3.3.0/24 is directly connected, Serial1/1

步骤十：在R2上配置手工总结

R2(config)#interface serial 1/0
R2(config-if)#ip summary-address rip 172.16.0.0 255.255.0.0

步骤十一：再次回到R1上查看路由表

R1#show 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 not set

R    172.16.0.0/16 [120/1] via 10.3.3.2, 00:00:00, Serial1/1
     10.0.0.0/8 is variably subnetted, 3 subnets, 2 masks
C       10.2.2.0/27 is directly connected, Loopback1
C       10.1.1.0/24 is directly connected, Loopback0
C       10.3.3.0/24 is directly connected, Serial1/1
R1#