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# System prepended metadata

title: Week11 Multi-Area OSPF

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Week11 Multi-Area OSPF
===

![](https://i.imgur.com/VL9yMF7.png)

* NYCU
    ![](https://i.imgur.com/UL1L2ge.png)
* CS-Core
    ![](https://i.imgur.com/J50GQ5a.png)
* CS-Aggre
    ![](https://i.imgur.com/AN3NNsL.png)
* EE-Core
    ![](https://i.imgur.com/clfr6O0.png)
* EE-Aggre
    ![](https://i.imgur.com/7vu4d04.png)
* Dorm-Core
    ![](https://i.imgur.com/ptK7VQ5.png)
* Dorm-Aggre
    ![](https://i.imgur.com/RIZczJ1.png)

* 設定 stub area
    * `area 1 stub`

* 檢查 OSPF route
    * `show ip route`
* 看 OSPF 鄰居
    * `show ip ospf neighbor`
* 看 routing information
    * `show ip protocols`
* 看知道的 network
    * `show ip ospf 10 database router`
* 看 DR 和其他 router 的連接情形
    * `show ip ospf 10 database network`
* 看 ABR 有關其他 area 的 network
    * `show ip ospf 10 database summary`
* 看 ABR 提供的 ASBR 資訊
    * `show ip ospf 10 database asbr-summary`
* 看 ASBR 提供的離開 AS 的路徑
    * `show ip ospf 10 database external`