【HCIP】BGP基础建邻和宣告实验

题目：

拓扑图：

配置

R1

//配置IP及环回

[r1]int l0
[r1-LoopBack0]ip add 1.1.1.1 24
[r1-LoopBack0]int g0/0/0
[r1-GigabitEthernet0/0/0]int g0/0/1
[r1-GigabitEthernet0/0/1]ip add 13.1.1.1 24
[r1-GigabitEthernet0/0/1]q

//建立BGP

[r1]bgp 1
[r1-bgp]router-id 1.1.1.1

[r1-bgp]peer 12.1.1.2 as-number 2
//宣告

[r1]bgp 1
[r1-bgp]network 1.1.1.1 24

R2

//配置IP及环回

[r2]int l0
[r2-LoopBack0]ip add 2.2.2.2 24
[r2-LoopBack0]int g0/0/1
[r2-GigabitEthernet0/0/1]ip add 12.1.1.2 24
[r2-GigabitEthernet0/0/1]int g0/0/0
[r2-GigabitEthernet0/0/0]ip add 24.1.1.1 24

//宣告ospf
[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 23.1.1.1 0.0.0.0

//建立BGP

[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 
[r2-bgp]peer 3.3.3.3 connect-interface LoopBack 0
[r2-bgp]peer 4.4.4.4 as-number 2
[r2-bgp]peer 4.4.4.4 connect-interface LoopBack 0
//宣告

[r2]bgp 2
[r2-bgp]peer 3.3.3.3 next-hop-local
[r2-bgp]network 2.2.2.2 24

R3

//配置IP及环回

[r3]int l0
[r3-LoopBack0]ip add 3.3.3.3 24
[r3-LoopBack0]int g0/0/1
[r3-GigabitEthernet0/0/1]ip add 23.1.1.2 24
[r3-GigabitEthernet0/0/1]int g0/0/0
[r3-GigabitEthernet0/0/0]ip add 34.1.1.1 24
//宣告ospf

[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 23.1.1.2 0.0.0.0
[r3-ospf-1-area-0.0.0.0]network 34.1.1.1 0.0.0.0
//建立BGP

[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
//宣告

[r3]bgp 2
[r3-bgp]network 3.3.3.3 24

R4

//配置IP及环回
[r4]int l0
[r4-LoopBack0]ip add 4.4.4.4 24
[r4-LoopBack0]int g0/0/1
[r4-GigabitEthernet0/0/1]ip add 34.1.1.2 24
[r4-GigabitEthernet0/0/1]int g0/0/0
[r4-GigabitEthernet0/0/0]ip add 45.1.1.1 24
[r4-GigabitEthernet0/0/0]int g0/0/2
[r4-GigabitEthernet0/0/2]ip add 54.1.1.1 24
//宣告ospf
[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

[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 2.2.2.2 as-number 2
[r4-bgp]peer 2.2.2.2 connect-interface LoopBack 0
[r4-bgp]q
[r4]ip route-static 5.5.5.5 32 45.1.1.2
[r4]ip route-static 5.5.5.5 32 54.1.1.2
[r4]bgp 2
[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 2
//宣告

[r4]bgp 2
[r4-bgp]peer 3.3.3.3 next-hop-local
[r4-bgp]peer 2.2.2.2 next-hop-local
[r4-bgp]network 4.4.4.4 24

R5

//配置IP及环回
[r5]int l0
[r5-LoopBack0]ip add 5.5.5.5 24
[r5-LoopBack0]int l1
[r5-LoopBack1]ip add 99.1.1.1 24
[r5-LoopBack1]int g0/0/1
[r5-GigabitEthernet0/0/1]ip add 45.1.1.2 24
[r5-GigabitEthernet0/0/1]int g0/0/0
[r5-GigabitEthernet0/0/0]ip add 54.1.1.2 24
//建立BGP
[r5]ip route-static 4.4.4.4 24 45.1.1.1
[r5]ip route-static 4.4.4.4 24 54.1.1.1
[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 2
//宣告

[r5]bgp 3
[r5-bgp]network 5.5.5.5 24
[r5-bgp]network 99.1.1.1 24

检验：

R1能ping通R5的两个环回

查看BGP表，每个环回都有

R1

 

R2

 

R3

R4

R5