BGP综合实验

1,配置IP地址

配置IP地址基于172.16.0.0/16划分网段:

建邻:

R1:172.16.0.1/32

R2:172.16.0.2/32

R3:172.16.0.3/32

R4:172.16.0.4/32

R5:172.16.0.5/32

R6:172.16.0.6/32

R7:172.16.0.7/32

R8:172.16.0.8/32

骨干链路:

172.16.1.0/30

172.16.1.4/30

172.16.1.8/30

172.16.1.12/30

172.16.1.16/30

172.16.1.20/30

业务网段:

R1:192.168.1.0/24

R3:172.16.3.0/24

R4:172.16.4.0/24

R5:172.16.5.0/24

R6:172.16.6.0/24

R7:172.16.7.0/24

R8:192.168.2.0/24
R1:
[r1]dis ip interface brief 
Interface                         IP Address/Mask      Physical   Protocol  
GigabitEthernet0/0/0              12.1.1.1/24          up         up             
LoopBack0                         172.16.0.1/32        up         up(s)     
LoopBack1                         192.168.1.1/24       up         up(s)     

R2:
[r2]dis ip interface brief 
Interface                         IP Address/Mask      Physical   Protocol  
GigabitEthernet0/0/0              12.1.1.2/24          up         up        
GigabitEthernet0/0/1              172.16.1.1/30        up         up        
GigabitEthernet0/0/2              172.16.1.21/30       up         up        
LoopBack0                         172.16.0.2/32        up         up(s)     

R3:
[r3]dis ip interface brief 
Interface                         IP Address/Mask      Physical   Protocol  
GigabitEthernet0/0/0              172.16.1.2/30        up         up        
GigabitEthernet0/0/1              172.16.1.5/30        up         up           
LoopBack0                         172.16.0.3/32        up         up(s)     
LoopBack1                         172.16.3.3/24        up         up(s)     

R4:
[r4]dis ip interface b
Interface                         IP Address/Mask      Physical   Protocol  
GigabitEthernet0/0/0              172.16.1.6/30        up         up        
GigabitEthernet0/0/1              172.16.1.9/30        up         up          
LoopBack0                         172.16.0.4/32        up         up(s)     
LoopBack1                         172.16.4.4/24        up         up(s)     

R5:
[r5]dis ip interface brief 
Interface                         IP Address/Mask      Physical   Protocol  
GigabitEthernet0/0/0              172.16.1.22/30       up         up        
GigabitEthernet0/0/1              172.16.1.17/30       up         up           
LoopBack0                         172.16.0.5/32        up         up(s)     
LoopBack1                         172.16.5.5/24        up         up(s)     

R6:
[r6]dis ip interface brief 
Interface                         IP Address/Mask      Physical   Protocol  
GigabitEthernet0/0/0              172.16.1.18/30       up         up        
GigabitEthernet0/0/1              172.16.1.13/30       up         up             
LoopBack0                         172.16.0.6/32        up         up(s)     
LoopBack1                         172.16.6.6/24        up         up(s)     

[r7]dis ip interface brief 
Interface                         IP Address/Mask      Physical   Protocol  
GigabitEthernet0/0/0              172.16.1.14/30       up         up        
GigabitEthernet0/0/1              172.16.1.10/30       up         up        
GigabitEthernet0/0/2              34.1.1.7/24          up         up        
LoopBack0                         172.16.0.7/32        up         up(s)     
LoopBack1                         172.16.7.7/24        up         up(s)     

[r8]dis ip interface brief 
Interface                         IP Address/Mask      Physical   Protocol  
GigabitEthernet0/0/0              34.1.1.8/24          up         up             
LoopBack0                         172.16.0.8/32        up         up(s)     
LoopBack1                         192.168.2.8/24       up         up(s)     

2,OSPF实现AS内部信息互通

R2:

[r2]ospf 1 router-id 2.2.2.2
[r2-ospf-1]a 0
[r2-ospf-1-area-0.0.0.0]network 172.16.0.0 0.0.255.255

……

R7:

[r7]ospf 1 router-id 7.7.7.7
[r7-ospf-1]a 0
[r7-ospf-1-area-0.0.0.0]network 172.16.0.0 0.0.255.255

3,使用bgp协议使得整个网络所有设备互通

a,配置bgp协议

R1:
[r1]bgp 1
[r1-bgp]peer 12.1.1.2 as-number 2

R2:
[r2]bgp 64512
[r2-bgp]confederation id 2
[r2-bgp]confederation peer-as 64513
[r2-bgp]peer 12.1.1.1 as 1

[r2-bgp]peer 172.16.0.3 as 64512
[r2-bgp]peer 172.16.0.3 connect-interface l0
[r2-bgp]peer 172.16.0.3 next-hop-local 

[r2-bgp]peer 172.16.1.22 as 64513

R3:
[r3]bgp 64512
[r3-bgp]confederation id 2
[r3-bgp]peer 172.16.0.2 as 64512	
[r3-bgp]peer 172.16.0.2 connect-interface l0

[r3-bgp]peer 172.16.0.4 as 64512
[r3-bgp]peer 172.16.0.4 connect-interface l0

R4:
[r4]bgp 64512	
[r4-bgp]confederation id 2
[r4-bgp]peer 172.16.0.3 as 64512
[r4-bgp]peer 172.16.0.3 connect-interface l0
	
[r4-bgp]confederation peer-as 64513
[r4-bgp]peer 172.16.1.10 as 64513
[r4-bgp]peer 172.16.1.10 next-hop-local

R5:
[r5]bgp 64513	
[r5-bgp]confederation id 2
[r5-bgp]confederation peer-as 64512
[r5-bgp]peer 172.16.1.21 as 64512

[r5-bgp]peer 172.16.0.6 as 64513
[r5-bgp]peer 172.16.0.6 connect-interface l0
[r5-bgp]peer 172.16.0.6 next-hop-local

R6:
[r6]bgp 64513
[r6-bgp]confederation id 2
[r6-bgp]peer 172.16.0.7 as 64513
[r6-bgp]peer 172.16.0.7 connect-interface l0
[r6-bgp]peer 172.16.0.7 next-hop-local

[r6-bgp]peer 172.16.0.5 as 64513
[r6-bgp]peer 172.16.0.5 connect-interface l0

R7:
[r7]bgp 64513
[r7-bgp]confederation id 2
[r7-bgp]confederation peer-as 64512
[r7-bgp]peer 172.16.1.9 as 64512

[r7-bgp]peer 172.16.0.6 as 64513
[r7-bgp]peer 172.16.0.6 connect-interface l0	
[r7-bgp]peer 172.16.0.6 next-hop-local 

[r7-bgp]peer 34.1.1.8 as-number 3

R8:
[r8]bgp 3	
[r8-bgp]peer 34.1.1.7 as-number 2

b,用反射器解决水平分割问题

R3,R6作为反射器

R3:
[r3]bgp 64512
[r3-bgp]peer 172.16.0.2 reflect-client 
[r3-bgp]peer 172.16.0.4 reflect-client
[r3-bgp]reflector cluster-id 2001

R6:
[r6]bgp 64513	
[r6-bgp]peer 172.16.0.5 reflect-client 	
[r6-bgp]peer 172.16.0.7 reflect-client
[r6-bgp]reflector cluster-id 2002

c,宣告环回网段到bgp


R1:
[r1]bgp 1
[r1-bgp]network 172.16.0.1 16


R2:
[r2]ip route-static 172.16.0.0 16 NULL 0
[r2]bgp 64512
[r2-bgp]network 172.16.0.0 16


R7:
[r7]ip route-static 172.16.0.0 16 NULL 0
[r7]bgp 64513
[r7-bgp]network 172.16.0.0 16

R8:
[r8]bgp 3
[r8-bgp]network 172.16.0.8 16

d,构建隧道使得R1和R8的业务网段能被访问

[r1]int t 0/0/0
[r1-Tunnel0/0/0]ip address 10.1.1.1 24
[r1-Tunnel0/0/0]tunnel-protocol gre
[r1-Tunnel0/0/0]source 172.16.0.1
[r1-Tunnel0/0/0]destination 172.16.0.8
[r1]ip route-static 192.168.2.0 24 10.1.1.2

[r8]int t 0/0/0
[r8-Tunnel0/0/0]ip address 10.1.1.2 24
[r8-Tunnel0/0/0]tunnel-protocol gre 
[r8-Tunnel0/0/0]source 172.16.0.8
[r8-Tunnel0/0/0]destination 172.16.0.1
[r8]ip route-static 192.168.1.0 24 10.1.1.1

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