1.配置地址
2.啓動ospf協議
3.啓動rip協議
4.將PC1 的路由引入OSPF中
[R1]ospf 1
[R1-ospf-1]import-route direct
5.將 PC2重發布到RIP中
[R4]rip
[R4-rip-1]import-route direct
![[外鏈圖片轉存失敗,源站可能有防盜鏈機制,建議將圖片保存下來直接上傳(img-l7z0pru0-1581815797915)(C:\Users\asus\AppData\Roaming\Typora\typora-user-images\1581768467443.png)]](https://pic1.xuehuaimg.com/proxy/csdn/https://img-blog.csdnimg.cn/20200216091739390.png?x-oss-process=image/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2NzZG4xMDA4NjExMA==,size_16,color_FFFFFF,t_70)
6.在R2 和R3上進行雙點雙向重發布
[R3]rip
[R3-rip-1]import-route ospf 1
[R3]ospf 1
[R3-ospf-1]import-route rip u
[R2]rip
[R2-rip-1]import-route ospf 1
[R2]ospf 1
[R2-ospf-1]import-route rip
R1路由表
![[外鏈圖片轉存失敗,源站可能有防盜鏈機制,建議將圖片保存下來直接上傳(img-jh2IpFCn-1581815797915)(C:\Users\asus\AppData\Roaming\Typora\typora-user-images\1581768529276.png)]](https://pic1.xuehuaimg.com/proxy/csdn/https://img-blog.csdnimg.cn/20200216091802408.png?x-oss-process=image/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2NzZG4xMDA4NjExMA==,size_16,color_FFFFFF,t_70)
7.在R3的路由表中 存在一個次優路由
![[外鏈圖片轉存失敗,源站可能有防盜鏈機制,建議將圖片保存下來直接上傳(img-AxO8SaGv-1581815797916)(C:\Users\asus\AppData\Roaming\Typora\typora-user-images\1581768589528.png)]](https://pic1.xuehuaimg.com/proxy/csdn/https://img-blog.csdnimg.cn/20200216091817631.png)
（1）第一種解決辦法
[R2]ip ip-prefix pc1 permit 10.1.1.0 24
[R2]route-policy pc1 permit node 10
Info: New Sequence of this List.
[R2-route-policy]if-match ip-prefix pc1
[R2-route-policy]apply preference 90
[R2-route-policy]qu
[R2]route-policy pc1 permit node 20
Info: New Sequence of this List.
[R2]ospf 1
[R2-ospf-1]preference route-policy pc1
[R2-ospf-1]qu
[R3]ip ip-prefix pc1 permit 10.1.1.0 24
[R3]route-policy pc1 permit node 10
Info: New Sequence of this List.
[R3-route-policy]if-match ip-prefix pc1
[R3-route-policy]apply preference 160
[R3-route-policy]qu
[R3]route-policy pc1 permit node 20
Info: New Sequence of this List.
[R3-route-policy]qu
[R3]rip 1
[R3-rip-1]preference route-policy pc1
反應較慢 可以通過shutdown 接口來查看
R2上配置是爲了以後R2故障後出現該次優路由
![[外鏈圖片轉存失敗,源站可能有防盜鏈機制,建議將圖片保存下來直接上傳(img-5MeZoLZm-1581815797917)(C:\Users\asus\AppData\Roaming\Typora\typora-user-images\1581769340752.png)]](https://pic1.xuehuaimg.com/proxy/csdn/https://img-blog.csdnimg.cn/20200216091833324.png)
第二種方法：
[R3]ip ip-prefix xwl deny 10.1.1.0 24
[R3]ip ip-prefix xwl permit 0.0.0.0 0 less-equal 32
[R3-rip-1]filter-policy ip-prefix xwl import GigabitEthernet 0/0/1 學習到該次優路由的接口
![[外鏈圖片轉存失敗,源站可能有防盜鏈機制,建議將圖片保存下來直接上傳(img-jXPnLWFw-1581815797917)(C:\Users\asus\AppData\Roaming\Typora\typora-user-images\1581769746331.png)]](https://pic1.xuehuaimg.com/proxy/csdn/https://img-blog.csdnimg.cn/20200216091844956.png)
第三種方法：
[R1]ospf 1
[R1-ospf-1]
[R1-ospf-1]import-route direct ？
cost Set cost
route-policy Route policy
tag Specify route tag
type Metric type of the imported external routes
Please press ENTER to execute command
[R1-ospf-1]import-route direct tag 111
然後在R2 和R3上根據需求採取第一或第二種辦法
[R3]route-policy tag permit node 10
Info: New Sequence of this List.
[R3-route-policy]if-match tag 111
[R3-route-policy]apply preference 90
[R3-route-policy]qu
[R3]route-policy pc1 permit node 20
Info: New Sequence of this List.
[R3-route-policy]qu
[R2]ospf 1
[R2-ospf-1]preference route-policy tag
[R2-ospf-1]qu
