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BGP 第一次实验
2022-08-02 00:04:00 【Co_ml】

设计拓扑,配置ip ;
1--EBGP邻居关系建立:(r1-r2 r4-r5)
[r1]bgp 1
[r1-bgp]router-id 1.1.1.1
[r1-bgp]peer 12.1.1.2 as-number 2
[r2]bgp 2
[r2-bgp]router-id 2.2.2.2
[r2-bgp]peer 12.1.1.1 as-number 1
2--IBGP邻居关系建立: r2-r3-r4:
[r2]bgp 2
[r2-bgp]peer 3.3.3.3 as-number 2
[r2-bgp]peer 3.3.3.3 connect-interface LoopBack 0
3--EBGP存在多条物理链路 ,使用环回建邻:使用静态ip;
[Huawei]bgp 3
[Huawei-bgp]router-id 5.5.5.5
[Huawei-bgp]peer 4.4.4.4 as-number 2
[Huawei-bgp]peer 4.4.4.4 connect-interface LoopBack 0
4--建立ospf 宣告:
R1:
R2:

R3:

R4:

R5:

基于AS-BY-AS规则,条目在一个AS内部传递时将不修改条目属性;导致通过IBGP邻居学习到的BGP路由可能出现下一跳不可达;导致条目不优;
[r2-bgp]peer 3.3.3.3 next-hop-local
对各个环回宣告:
[r1-bgp]network 11.1.1.0 24
最终路由表:
R5ping R1

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