BGP基础配置实验

Nemophilistf.

于 2022-10-20 21:03:01 发布

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分类专栏： HCIP 文章标签：服务器运维网络协议

本文链接：https://blog.youkuaiyun.com/weixin_63781898/article/details/127434388

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实验拓扑

一、创建实验拓扑

二、配置规划并配置各个网段和环回的IP

[r1]int l0
[r1-LoopBack0]ip add 1.1.1.1 24
[r1-LoopBack0]int g0/0/0
[r1-GigabitEthernet0/0/0]ip add 12.0.0.1 24
 
[r2]int l0
[r2-LoopBack0]ip add 2.2.2.2 24
[r2-LoopBack0]int g0/0/0
[r2-GigabitEthernet0/0/0]ip add 12.0.0.2 24 
[r2-GigabitEthernet0/0/0]int g0/0/1
[r2-GigabitEthernet0/0/1]ip add 23.0.0.1 24
 
 
[r3-LoopBack0]ip add 3.3.3.3 24
[r3-LoopBack0]q
[r3]int g0/0/0
[r3-GigabitEthernet0/0/0]ip add 23.0.0.2 24
[r3-GigabitEthernet0/0/0]int g0/0/1
[r3-GigabitEthernet0/0/1]ip add 34.0.0.1 24
 
[r4-LoopBack0]ip add 4.4.4.4 24
[r4-LoopBack0]q
[r4]int g0/0/0
[r4-GigabitEthernet0/0/0]ip add 34.0.0.2 24
[r4-GigabitEthernet0/0/0]int g0/0/1
[r4-GigabitEthernet0/0/1]ip add 45.0.0.1 24
 
[r5]int l0
[r5-LoopBack0]ip add 5.5.5.5 24
[r5-LoopBack0]int l1
[r5-LoopBack1]ip add 6.6.6.6 24
[r5-LoopBack1]q
[r5]int g0/0/0
[r5-GigabitEthernet0/0/0]ip add 45.0.0.2 24

三、然后对AS2内部配置OSPF

R2：


[r2]ospf 1 router-id 2.2.2.2	
[r2-ospf-1]area 0	
[r2-ospf-1-area-0.0.0.0]network 2.2.2.2 0.0.0.0
[r2-ospf-1-area-0.0.0.0]network 23.0.0.0 0.0.0.255

R3：

[r3]ospf 1 router-id 3.3.3.3
[r3-ospf-1]area 0
[r3-ospf-1-area-0.0.0.0]network 3.3.3.3 0.0.0.0
[r3-ospf-1-area-0.0.0.0]network 23.0.0.0 0.0.0.255
[r3-ospf-1-area-0.0.0.0]network 34.0.0.0 0.0.0.255

R4：

[r4]ospf 1 router-id 4.4.4.4
[r4-ospf-1]area 0
[r4-ospf-1-area-0.0.0.0]network 4.4.4.4 0.0.0.0
[r4-ospf-1-area-0.0.0.0]network 34.0.0.0 0.0.0.255

四、接着配置BGP邻居

R1和R2之间建立直连邻居

配置如下

R1:

[r1]bgp 1
[r1-bgp]router-id 1.1.1.1
[r1-bgp]peer 12.0.0.2 as-number 2

R2:

[r2]bgp 2
[r2-bgp]router-id 2.2.2.2
[r2-bgp]peer 12.0.0.1 as-number 1

IBGP对等体之间环回接口建邻

R2：

[r2]bgp 2
[r2-bgp]router-id 2.2.2.2
[r2-bgp]peer 3.3.3.3 as-number 2
[r2-bgp]peer 4.4.4.4 as-number 2	
[r2-bgp]peer 3.3.3.3 connect-interface LoopBack 0
[r2-bgp]peer 4.4.4.4 connect-interface LoopBack 0
[r2-bgp]peer 3.3.3.3 next-hop-local
[r2-bgp]peer 4.4.4.4 next-hop-local

R3:

[r3]bgp 2
[r3-bgp]router-id 3.3.3.3
[r3-bgp]peer 2.2.2.2 as-number 2
[r3-bgp]peer 4.4.4.4 as-number 2
[r3-bgp]peer 2.2.2.2 connect-interface LoopBack 0
[r3-bgp]peer 4.4.4.4 connect-interface LoopBack 0 
[r3-bgp]peer 4.4.4.4 next-hop-local
[r3-bgp]peer 2.2.2.2 next-hop-local

R4:


[r4]bgp 2
[r4-bgp]router-id 4.4.4.4
[r4-bgp]peer 2.2.2.2 as-number 2	
[r4-bgp]peer 2.2.2.2 connect-interface LoopBack 0
[r4-bgp]peer 3.3.3.3 connect-interface LoopBack 0
[r4-bgp]peer 2.2.2.2 next-hop-local
[r4-bgp]peer 3.3.3.3 next-hop-local

R4和R5 EBGP对等体之间的非直连建邻

R4:

[r4-bgp]peer 5.5.5.5 as-number 3
[r4-bgp]peer 5.5.5.5 connect-interface LoopBack 0	
[r4-bgp]peer 5.5.5.5 ebgp-max-hop

R5:

[r5]bgp 3
[r5-bgp]router-id 5.5.5.5
[r5-bgp]peer 4.4.4.4 as-number 2
[r5-bgp]peer 4.4.4.4 connect-interface LoopBack 0
[r5-bgp]peer 4.4.4.4 ebgp-max-hop