配置案例：IP、OSPF与BGP在多设备间的协作-优快云博客

本文链接：https://blog.youkuaiyun.com/weixin_70790602/article/details/132267692

文章详细描述了在多个路由器R1至R8上配置IP地址、启动OSPF协议，设置BGP邻居关系，包括联盟配置、下一跳指定和条件性的IBGP水平分割，以及如何宣告BGP路由和防止环路的过程。

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题目要求：

一、配置IP以及环回

二、启动OSPF

三、修改用户网段工作方式

四、配置BGP

[r1]bgp 1
[r1-bgp]router-id 1.1.1.1
[r1-bgp]peer 12.1.1.2 as-number 2

[r2]bgp 64512
[r2-bgp]router-id 2.2.2.2
[r2-bgp]confederation id 2
[r2-bgp]confederation peer-as 64513
[r2-bgp]peer 12.1.1.1 as-number 1
[r2-bgp]peer 172.16.1.5 as-number 64512
[r2-bgp]peer 172.16.1.5 connect-interface LoopBack 1
[r2-bgp]peer 172.16.1.13 as-number 64513
[r2-bgp]peer 172.16.1.13 connect-interface LoopBack 1
[r2-bgp]peer 172.16.1.13 ebgp-max-hop 2

[r3]bgp 64512
[r3-bgp]router-id 3.3.3.3
[r3-bgp]confederation id 2
[r3-bgp]peer 172.16.1.1 as-number 64512
[r3-bgp]peer 172.16.1.1 connect-interface LoopBack 1
[r3-bgp]peer 172.16.1.9 as-number 64512
[r3-bgp]peer 172.16.1.9 connect-interface LoopBack 1

[r3]bgp 64512
[r3-bgp]router-id 3.3.3.3
[r3-bgp]confederation id 2
[r3-bgp]confederation peer-as 64513
[r3-bgp]peer 172.16.1.1 as-number 64512
[r3-bgp]peer 172.16.1.1 connect-interface LoopBack 1
[r3-bgp]peer 172.16.1.9 as-number 64512
[r3-bgp]peer 172.16.1.9 connect-interface LoopBack 1

[r4]bgp 64512
[r4-bgp]router-id 4.4.4.4
[r4-bgp]confederation id 2
[r4-bgp]confederation peer-as 64513
[r4-bgp]peer 172.16.1.5 as-number 64512
[r4-bgp]peer 172.16.1.5 connect-interface LoopBack 1
[r4-bgp]peer 172.16.1.21 as-number 64513
[r4-bgp]peer 172.16.1.21 connect-interface LoopBack 1
[r4-bgp]peer 172.16.1.21 ebgp-max-hop 2

[r5]bgp 64513
[r5-bgp]router-id 5.5.5.5
[r5-bgp]confederation id 2
[r5-bgp]confederation peer-as 64512
[r5-bgp]peer 172.16.1.17 as-number 64513
[r5-bgp]peer 172.16.1.17 connect-interface LoopBack 1
[r5-bgp]peer 172.16.1.1 as-number 64512
[r5-bgp]peer 172.16.1.1 connect-interface LoopBack 1
[r5-bgp]peer 172.16.1.1 ebgp-max-hop 2

[r6]bgp 64513
[r6-bgp]router-id 6.6.6.6
[r6-bgp]confederation id 2
[r6-bgp]peer 172.16.1.21 as-number 64513
[r6-bgp]peer 172.16.1.21 connect-interface LoopBack 1
[r6-bgp]peer 172.16.1.13 as-number 64513
[r6-bgp]peer 172.16.1.13 connect-interface LoopBack 1

[r7]bgp 64513
[r7-bgp]router-id 7.7.7.7
[r7-bgp]confederation id 2
[r7-bgp]confederation peer-as 64512
[r7-bgp]peer 172.16.1.17 as-number 64513
[r7-bgp]peer 172.16.1.17 connect-interface LoopBack 1
[r7-bgp]peer 172.16.1.9 as-number 64512
[r7-bgp]peer 172.16.1.9 connect-interface LoopBack 1
[r7-bgp]peer 172.16.1.9 ebgp-max-hop 2
[r7-bgp]peer 78.1.1.2 as-number 3

[r8]bgp 3
[r8-bgp]router-id 8.8.8.8
[r8-bgp]peer 78.1.1.1 as-number 2

五、宣告BGP