BGP实验

第一步：配置IP

 

第二步：写ospf

在R2，R3，R4，R5，R6，R7上分别配置ospf

如：R2

[R2]ospf 1 router-id  2.2.2.2
[R2-ospf-1]area 0
[R2-ospf-1-area-0.0.0.0]network 172.16.0.0 0.0.255.255

R3

[R3]ospf 1 router-id 3.3.3.3
[R3-ospf-1]area 0
[R3-ospf-1-area-0.0.0.0]network 172.16.0.0 0.0.255.255 

R4

[R4]ospf 1 router-id 4.4.4.4
[R4-ospf-1]area 0 
[R4-ospf-1-area-0.0.0.0]network 172.16.0.0 0.0.255.255

R5

 [R5]ospf 1 router-id 5.5.5.5
[R5-ospf-1]area 0
[R5-ospf-1-area-0.0.0.0]network 172.16.0.0 0.0.255.255

R6

[R6]ospf 1 router-id 6.6.6.6
[R6-ospf-1]area 0
[R6-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]area 0
[R7-ospf-1-area-0.0.0.0]network 172.16.0.0 0.0.255.255

 第三步：进行BGP配置，并进行建邻操作

R1

[R1]bgp 100
[R1-bgp]route-select
[R1-bgp]router-id 1.1.1.1
[R1-bgp]peer 12.0.0.2 as-number 200

R2

[R2]bgp 64512
[R2-bgp]router-id 2.2.2.2
[R2-bgp]confederation id 200
[R2-bgp]peer 12.0.0.1 as-number 100

[R2-bgp]peer 12.0.0.1 ebgp-max-hop 2
[R2-bgp]peer 172.16.3.1 as-number 64512
[R2-bgp]peer 172.16.3.1 connect-interface l    
[R2-bgp]peer 172.16.3.1 connect-interface LoopBack 0

R3

[R3]bgp 64512
[R3-bgp]router-id 3.3.3.3
 [R3-bgp]peer 172.16.2.1 as-number 64512
[R3-bgp]peer 172.16.2.1 connect-interface LoopBack 0
[R3-bgp]peer 172.16.4.1 as-number 64512
[R3-bgp]peer 172.16.4.1 connect-interface LoopBack 0

R4

[R4]bgp 64512
[R4-bgp]confederation id 200
[R4-bgp]router-id 4.4.4.4
[R4-bgp]peer 172.16.3.1 as-number 64512
[R4-bgp]peer 172.16.3.1 connect-interface LoopBack 0 

R5

[R5]bgp 64513
[R5-bgp]confederation id 200
[R5-bgp]router-id 5.5.5.5
[R5-bgp]peer 172.16.6.1 as-number 64513 
[R5-bgp]peer 172.16.6.1 connect-interface LoopBack 0 

R6

[R6]bgp 64513
[R6-bgp]confederation id 200
[R6-bgp]router-id 6.6.6.6
[R6-bgp]peer 172.16.5.1 as-number 64513
[R6-bgp]peer 172.16.5.1 connect-interface LoopBack 0
[R6-bgp]peer 172.16.7.1 as-number 64513
[R6-bgp]peer 172.16.7.1 connect-interface LoopBack 0

R7

[R7]bgp 64513
[R7-bgp]confederation id 200
[R7-bgp]router-id 7.7.7.7
[R7-bgp]peer 78.0.0.2 as-number 300
[R7-bgp]peer 172.16.6.1 as-number 64513
[R7-bgp]peer 172.16.6.1 connect-interface LoopBack 0

R8

[R8]bgp 300
[R8-bgp]router-id 8.8.8.8
[R8-bgp]peer 78.0.0.1 as-number 200 

 第四步：AS2内部进行AS联邦配置

 R2

[R2]bgp 64512
[R2-bgp]confederation peer-as  64513
[R2-bgp]peer 172.16.5.1 as-number 64513
[R2-bgp]peer 172.16.5.1 connect-interface LoopBack 0
[R2-bgp]peer 172.16.5.1 ebgp-max-hop 2

R4

[R4]bgp 64512
[R4-bgp]confederation peer-as 64513
[R4-bgp]peer 172.16.7.1 as-number 64513
[R4-bgp]peer 172.16.7.1 connect-interface LoopBack 0
[R4-bgp]peer 172.16.7.1 ebgp-max-hop 2

R5

 [R5]bgp 64513
[R5-bgp]confederation peer-as 64512
[R5-bgp]peer 172.16.2.1 as-number 64512
[R5-bgp]peer 172.16.2.1 connect-interface LoopBack 0
[R5-bgp]peer 172.16.2.1 ebgp-max-hop 2 

R7

[R7]bgp 64513
[R7-bgp]confederation peer-as 64512
[R7-bgp]peer 172.16.4.1 as-number 64512
[R7-bgp]peer 172.16.4.1 connect-interface LoopBack 0
[R7-bgp]peer 172.16.4.1 ebgp-max-hop 2 

 第五步：宣告10.0.0.0/24和11.0.0.0/24网段，以及修改在R2和R7上传输给AS 2内部的对等体的下一跳属性，并指定为自己与对等体的连接地址

[R1]bgp 100 
[R1-bgp]network 10.0.0.0 24

[R8]bgp 300

[R8-bgp]network 11.0.0.0 24

[R2]bgp 64512
[R2-bgp]peer 172.16.3.1 next-hop-local
[R2-bgp]peer 172.16.5.1 next-hop-local

[R7]bgp 64513
[R7-bgp]peer 172.16.4.1 next-hop-local
[R7-bgp]peer 172.16.6.1 next-hop-local

第六步：指定R3和R6为路由反射器，并将R2和R7分别定为R3和R6的客户

R3

[R3]bgp 64512
[R3-bgp]peer 172.16.2.1 reflect-client

R6

[R6]bgp 64513
[R6-bgp]peer 172.16.7.1 reflect-client

第七步：对AS 2区域内的路由进行聚合，并配置空接口

​​​​​​​[R2]ip route-static 172.16.0.0 16 NULL 0

[R2-bgp]network 172.16.0.0 16

[R7]ip route-static 172.16.0.0 16 NULL 0

[R7]bgp 64513

[R7-bgp]network 172.16.0.0 16

第八步：在R2和R7上宣告其他AS区域的网段，使得全网可达 

[R2]bgp 64512
[R2-bgp]network 12.0.0.0 24

[R7]bgp 64513
[R7-bgp]network 78.0.0.0 24