学习目的：
理解路由相互引入的意义
掌握从OSPF向RIP注入路由的方法
掌握从RIP向OSPF注入路由的方法
拓扑图：
场景
你是公司的网络管理员。当前公司网络使用了RIPv2和OSPF协议。为了实现RIP区域设备与OSPF区域设备之间的互通。你需要配置路由的相互引入操作。配置时需要注意不同路由协议度量值定义的标准。
学习任务
步骤一.基本配置与IP编址
[Huawei]sysname R1
[R1]interface s1/0/0
[R1-Serial1/0/0]ip add 10.0.12.1 24
[R1-Serial1/0/0]desc this port connect to R2-S1/0/0
[R1-Serial1/0/0]interface g0/0/0
[R1-GigabitEthernet0/0/0]ip add 10.0.13.1 24
[R1-GigabitEthernet0/0/0]desc this port connect toR3-G0/0/0
[R1-GigabitEthernet0/0/0]interface loopback0
[R1-LoopBack0]ip add 10.0.1.1 24
[R1-LoopBack0]q
R2、R3、IP编址参照R1配置
步骤二.OSPF协议配置及验证
R1与R2之间运行OSPF，配置属于Area0.
[R1]ospf 1 rout
[R1]ospf 1 router-id 10.0.1.1
[R1-ospf-1]area 0
[R1-ospf-1-area-0.0.0.0]network 10.0.12.0 0.0.0.255
[R1-ospf-1-area-0.0.0.0]
[R2]ospf 1 router-id 10.0.2.2
[R2-ospf-1]area 0
[R2-ospf-1-area-0.0.0.0]network 10.0.2.0 0.0.0.255
[R2-ospf-1-area-0.0.0.0]network 10.0.12.0 0.0.0.255
查看R1、R2的路由表、确认已通过OSPF学习其他网段的路由。
<R1>dis ip routing-table protocol ospf
Route Flags: R - relay, D - download to fib
------------------------------------------------------------------------------
Public routing table : OSPF
Destinations : 1 Routes :1
OSPF routing table status : <Active>
Destinations : 1 Routes : 1
Destination/Mask Proto Pre Cost Flags NextHop Interface
10.0.2.2/32 OSPF 10 48 D 10.0.12.2 Serial1/0/0
OSPF routing table status : <Inactive>
Destinations : 0 Routes : 0
<R2>dis ip routing-table protocol ospf
<R2>
OSPF区域的网络都与R2直连，所以R2未通过OSPF学到额外的路由信息。
步骤三.RIPv2协议配置及验证
在R1上开启RIP协议进程，配置实用版本号为2.将10.0.0.0网段通告进RIP路由进程。
[R1]rip 1
[R1-rip-1]version 2
[R1-rip-1]network 10.0.0.0
在R3上开启RIP协议进程，配置实用版本号为2，将172.16.0.0和10.0.0.0两个网段通告进RIP路由进程。
[R3]rip 1
[R3-rip-1]version 2
[R3-rip-1]network 10.0.0.0
[R3-rip-1]network 172.16.0.0
查看R1和R3的路由表，确认路由器已经通过RIP学习到相应的路由。
[R1]dis ip routing-table protocol rip
Route Flags: R - relay, D - download to fib
------------------------------------------------------------------------------
Public routing table : RIP
Destinations : 5 Routes :5
RIP routing table status : <Active>
Destinations : 5 Routes : 5
Destination/Mask Proto Pre Cost Flags NextHop Interface
10.0.3.0/24 RIP 100 1 D 10.0.13.3 GigabitEthernet0/0/0
172.16.0.0/24 RIP 100 1 D 10.0.13.3 GigabitEthernet0/0/0
172.16.1.0/24 RIP 100 1 D 10.0.13.3 GigabitEthernet0/0/0
172.16.2.0/24 RIP 100 1 D 10.0.13.3 GigabitEthernet0/0/0
172.16.3.0/24 RIP 100 1 D 10.0.13.3 GigabitEthernet0/0/0
RIP routing table status : <Inactive>
Destinations : 0 Routes : 0
[R3]disp ip routing-table protocol rip
Route Flags: R - relay, D - download to fib
------------------------------------------------------------------------------
Public routing table : RIP
Destinations : 2 Routes : 2
RIP routing table status : <Active>
Destinations : 2 Routes : 2
Destination/Mask Proto Pre Cost Flags NextHop Interface
10.0.1.0/24 RIP 100 1 D 10.0.13.1 GigabitEthernet0/0/0
10.0.12.0/24 RIP 100 1 D 10.0.13.1 GigabitEthernet0/0/0
RIP routing table status : <Inactive>
Destinations : 0 Routes : 0
步骤四.RIPv2和OSPF协议相互引入配置及验证
到目前为止，R2、R3未学到对方的路由信息，原因是他们不在同一种路由区域。在R1上将RIP学到的路由引入到OSPF路由表中。
[R1]ospf 1
[R1-ospf-1]impor
[R1-ospf-1]import-route rip 1 cost 100
在R1上执行将ospf路由引入到RIP路由域。
[R1]rip 1
[R1-rip-1]import-route ospf 1 cost 1
验证R1、R2、R3的路由表，确认学习到路由
[R1]display ip routing-table
Route Flags: R - relay, D - download to fib
------------------------------------------------------------------------------
Routing Tables: Public
Destinations : 20 Routes :20
Destination/Mask Proto Pre Cost Flags NextHop Interface
10.0.1.0/24 Direct 0 0 D 10.0.1.1 LoopBack0
10.0.1.1/32 Direct 0 0 D 127.0.0.1 LoopBack0
10.0.1.255/32 Direct 0 0 D 127.0.0.1 LoopBack0
10.0.2.2/32 OSPF 10 48 D 10.0.12.2 Serial1/0/0
10.0.3.0/24 RIP 100 1 D 10.0.13.3 GigabitEthernet0/0/0
10.0.12.0/24 Direct 0 0 D 10.0.12.1 Serial1/0/0
10.0.12.1/32 Direct 0 0 D 127.0.0.1 Serial1/0/0
10.0.12.2/32 Direct 0 0 D 10.0.12.2 Serial1/0/0
10.0.12.255/32 Direct 0 0 D 127.0.0.1 Serial1/0/0
10.0.13.0/24 Direct 0 0 D 10.0.13.1 GigabitEthernet0/0/0
10.0.13.1/32 Direct 0 0 D 127.0.0.1 GigabitEthernet0/0/0
10.0.13.255/32 Direct 0 0 D 127.0.0.1 GigabitEthernet0/0/0
127.0.0.0/8 Direct 0 0 D 127.0.0.1 InLoopBack0
127.0.0.1/32 Direct 0 0 D 127.0.0.1 InLoopBack0
127.255.255.255/32 Direct 0 0 D 127.0.0.1 InLoopBack0
172.16.0.0/24 RIP 100 1 D 10.0.13.3 GigabitEthernet0/0/0
172.16.1.0/24 RIP 100 1 D 10.0.13.3 GigabitEthernet0/0/0
172.16.2.0/24 RIP 100 1 D 10.0.13.3 GigabitEthernet0/0/0
172.16.3.0/24 RIP 100 1 D 10.0.13.3 GigabitEthernet0/0/0
255.255.255.255/32 Direct 0 0 D 127.0.0.1 InLoopBack0
R1的路由表之前比较无变化，原因是R1同时处于OSPF和RIP路由区域，在引入路由之前就已经学习到了所有的路由信息。
确认R2、R3的路由表已经学习到如下路由。
<R2>displ ip routing-table protocolospf
Route Flags: R - relay, D - download to fib
------------------------------------------------------------------------------
Public routing table : OSPF
Destinations : 7 Routes :7
OSPF routing table status : <Active>
Destinations : 7 Routes : 7
Destination/Mask Proto Pre Cost Flags NextHop Interface
10.0.1.0/24 O_ASE 150 100 D 10.0.12.1 Serial1/0/0
10.0.3.0/24 O_ASE 150 100 D 10.0.12.1 Serial1/0/0
10.0.13.0/24 O_ASE 150 100 D 10.0.12.1 Serial1/0/0
172.16.0.0/24 O_ASE 150 100 D 10.0.12.1 Serial1/0/0
172.16.1.0/24 O_ASE 150 100 D 10.0.12.1 Serial1/0/0
172.16.2.0/24 O_ASE 150 100 D 10.0.12.1 Serial1/0/0
172.16.3.0/24 O_ASE 150 100 D 10.0.12.1 Serial1/0/0
OSPF routing table status : <Inactive>
Destinations : 0 Routes : 0
<R3>disp ip routing-table protocol rip
Route Flags: R - relay, D - download to fib
------------------------------------------------------------------------------
Public routing table : RIP
Destinations : 3 Routes :3
RIP routing table status : <Active>
Destinations : 3 Routes : 3
Destination/Mask Proto Pre Cost Flags NextHop Interface
10.0.1.0/24 RIP 100 1 D 10.0.13.1 GigabitEthernet0/0/0
10.0.2.2/32 RIP 100 2 D 10.0.13.1 GigabitEthernet0/0/0
10.0.12.0/24 RIP 100 1 D 10.0.13.1 GigabitEthernet0/0/0
RIP routing table status : <Inactive>
Destinations : 0 Routes : 0
测试网络连通性。在R2上使用扩展ping命令，定义数据包的源地址，测试到达地址10.0.3.3的连通性。
<R2>ping -a 10.0.2.2 10.0.3.3
PING10.0.3.3: 56 data bytes, press CTRL_C tobreak
Request time out
Reply from 10.0.3.3: bytes=56 Sequence=2 ttl=254 time=30 ms
Reply from 10.0.3.3: bytes=56 Sequence=3 ttl=254 time=10 ms
Reply from 10.0.3.3: bytes=56 Sequence=4 ttl=254 time=20 ms
Reply from 10.0.3.3: bytes=56 Sequence=5 ttl=254 time=10 ms
---10.0.3.3 ping statistics ---
5packet(s) transmitted
4packet(s) received
20.00% packet loss
round-trip min/avg/max = 10/17/30 ms
<R2>ping -a 10.0.2.2 172.16.0.1
PING172.16.0.1: 56 data bytes, press CTRL_Cto break
Reply from 172.16.0.1: bytes=56 Sequence=1 ttl=254 time=30 ms
Reply from 172.16.0.1: bytes=56 Sequence=2 ttl=254 time=10 ms
Reply from 172.16.0.1: bytes=56 Sequence=3 ttl=254 time=20 ms
Reply from 172.16.0.1: bytes=56 Sequence=4 ttl=254 time=10 ms
Reply from 172.16.0.1: bytes=56 Sequence=5 ttl=254 time=10 ms
---172.16.0.1 ping statistics ---
5packet(s) transmitted
5 packet(s) received
0.00% packet loss
round-trip min/avg/max = 10/16/30 ms
在R3的接口G0/0/0上配置RIP手动路由汇总。
[R3]interface g0/0/0
[R3-GigabitEthernet0/0/0]rip summary
[R3-GigabitEthernet0/0/0]rip summary-address172.16.0.0 255.255.252.0
验证R1、R2的路由表、比较与步骤三中显示的路由表的区别。
<R1>displ ip routing-table
Route Flags: R - relay, D - download to fib
------------------------------------------------------------------------------
Routing Tables: Public
Destinations : 17 Routes :17
Destination/Mask Proto Pre Cost Flags NextHop Interface
10.0.1.0/24 Direct 0 0 D 10.0.1.1 LoopBack0
10.0.1.1/32 Direct 0 0 D 127.0.0.1 LoopBack0
10.0.1.255/32 Direct 0 0 D 127.0.0.1 LoopBack0
10.0.2.2/32 OSPF 10 48 D 10.0.12.2 Serial1/0/0
10.0.3.0/24 RIP 100 1 D 10.0.13.3 GigabitEthernet0/0/0
10.0.12.0/24 Direct 0 0 D 10.0.12.1 Serial1/0/0
10.0.12.1/32 Direct 0 0 D 127.0.0.1 Serial1/0/0
10.0.12.2/32 Direct 0 0 D 10.0.12.2 Serial1/0/0
10.0.12.255/32 Direct 0 0 D 127.0.0.1 Serial1/0/0
10.0.13.0/24 Direct 0 0 D 10.0.13.1 GigabitEthernet0/0/0
10.0.13.1/32 Direct 0 0 D 127.0.0.1 GigabitEthernet0/0/0
10.0.13.255/32 Direct 0 0 D 127.0.0.1 GigabitEthernet0/0/0
127.0.0.0/8 Direct 0 0 D 127.0.0.1 InLoopBack0
127.0.0.1/32 Direct 0 0 D 127.0.0.1 InLoopBack0
127.255.255.255/32 Direct 0 0 D 127.0.0.1 InLoopBack0
172.16.0.0/22 RIP 100 1 D 10.0.13.3 GigabitEthernet0/0/0
255.255.255.255/32 Direct 0 0 D 127.0.0.1 InLoopBack0
<R2>disp ip routing-table protocol ospf
Route Flags: R - relay, D - download to fib
------------------------------------------------------------------------------
Public routing table : OSPF
Destinations : 4 Routes :4
OSPF routing table status : <Active>
Destinations : 4 Routes : 4
Destination/Mask Proto Pre Cost Flags NextHop Interface
10.0.1.0/24 O_ASE 150 100 D 10.0.12.1 Serial1/0/0
10.0.3.0/24 O_ASE 150 100 D 10.0.12.1 Serial1/0/0
10.0.13.0/24 O_ASE 150 100 D 10.0.12.1 Serial1/0/0
172.16.0.0/22 O_ASE 150 100 D 10.0.12.1 Serial1/0/0
OSPF routing table status : <Inactive>
Destinations : 0 Routes : 0
此时R1、R2学到的路由是汇总路由172.16.0.0/22,而不是明细路由172.16.0.0/24等
本文转自 zhuxtqw 51CTO博客，原文链接：http://blog.51cto.com/1054054/1434968，如需转载请自行联系原作者
