BGP基础实验

最新推荐文章于 2024-08-05 14:56:15 发布

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最新推荐文章于 2024-08-05 14:56:15 发布

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本文链接：https://blog.youkuaiyun.com/weixin_72849082/article/details/127318187

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本文通过配置IP地址，详细介绍了如何在AS2内部使用OSPF进行宣告。实验涉及建立EBGP和IBGP对等体关系，其中EBGP通过直连，IBGP通过环回接口实现。此外，R1和R5的环回路由被宣告到BGP，并将下一跳设置为本地。

摘要生成于 C知道，由 DeepSeek-R1 满血版支持，前往体验 >

配置IP地址

[r1-GigabitEthernet0/0/0]ip address 12.1.1.1 24
[r1-LoopBack0]ip address 1.1.1.1 24
 
[r2-GigabitEthernet0/0/0]ip address 12.1.1.2 24
[r2-GigabitEthernet0/0/1]ip address 23.1.1.1 24
[r2-LoopBack0]ip address 2.2.2.2 24
 
[r3-GigabitEthernet0/0/0]ip address 23.1.1.2 24
[r3-GigabitEthernet0/0/1]ip address 34.1.1.1 24
[r3-LoopBack0]ip address 3.3.3.3 24
 
[r4-GigabitEthernet0/0/0]ip address 34.1.1.2 24	
[r4-GigabitEthernet0/0/1]ip address 45.1.1.1 24
[r4-LoopBack0]ip address 4.4.4.4 24
 
[r5-GigabitEthernet0/0/0]ip address 45.1.1.2 24	
[r5-LoopBack0]ip address 5.5.5.5 24

AS2内部是用OSPF宣告

[r2]ospf 1 router-id 2.2.2.2
[r2-ospf-1]area 0
[r2-ospf-1-area-0.0.0.0]network 23.1.1.1 0.0.0.0
[r2-ospf-1-area-0.0.0.0]network 2.2.2.2 0.0.0.0
 
[r3]ospf 1 router-id 3.3.3.3
[r3-ospf-1]area 0
[r3-ospf-1-area-0.0.0.0]network 23.1.1.2 0.0.0.0
[r3-ospf-1-area-0.0.0.0]network 34.1.1.1 0.0.0.0
[r3-ospf-1-area-0.0.0.0]network 3.3.3.3 0.0.0.0
 
 
[r4]ospf 1 router-id 4.4.4.4
[r4-ospf-1]area 0
[r4-ospf-1-area-0.0.0.0]network 34.1.1.2 0.0.0.0
[r4-ospf-1-area-0.0.0.0]network 4.4.4.4 0.0.0.0

建立BGP对等体关系,EBGP用直连，IBGP用环回接口，R2-R4也建立IBGP

[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	
[r2-bgp]peer 3.3.3.3 as-number 2	
[r2-bgp]peer 3.3.3.3 connect-interface LoopBack 0
 
[r3]bgp 2
[r3-bgp]router-id 3.3.3.3
[r3-bgp]peer 2.2.2.2 as-number 2		
[r3-bgp]peer 2.2.2.2 connect-interface LoopBack 0
[r3-bgp]peer 4.4.4.4 as-number 2		
[r3-bgp]peer 4.4.4.4 connect-interface LoopBack 0
 
 
[r4]bgp 2
[r4-bgp]router-id 4.4.4.4
[r4-bgp]peer 3.3.3.3 as-number 2	
[r4-bgp]peer 3.3.3.3 connect-interface LoopBack 0	
[r4-bgp]peer 45.1.1.2 as-number 3
 
[r5]bgp 3	
[r5-bgp]router-id 5.5.5.5	
[r5-bgp]peer 45.1.1.1 as-number 2
 
[r2-bgp]peer 4.4.4.4 as 2	
[r2-bgp]peer 4.4.4.4 connect-interface LoopBack 0
 
[r4-bgp]peer 2.2.2.2 as 2
[r4-bgp]peer 2.2.2.2 connect-interface LoopBack 0

BGP宣告R1,R5环回路由，BGP中将下一跳改为本地

[r1-bgp]network 1.1.1.0 24
 
[r2-bgp]peer 3.3.3.3 next-hop-local
[r2-bgp]peer 4.4.4.4 next-hop-local
 
[r5-bgp]network 5.5.5.0 24
 
[r4-bgp]peer 3.3.3.3 next-hop-local
[r4-bgp]peer 2.2.2.2 next-hop-local