HCIP——BGP小综合实验

一.实验要求

1.R2-R7每台路由器均存在一个环回接口用于建立邻居;同时还存在一个环回来代替连接用户接口;最终这些连接用户的接口网络需要可以和R1/8的环回通讯。

2.AS2网段地址172.16.0.0/16, 减少路由条目数量。 

二.实验拓扑 

HCIP——BGP小综合实验_第1张图片

 三.实验过程

1.IP地址规划 

172.16.0.0/16
172.16.0.0/24—骨干链路172.16.0.0/30
172.16.1.0/24—建立邻居的环回,172.16.1.1/24、172.16.1.2/24、172.16.1.3/24等
172.16.2.0/24
172.16.3.0/24
172.16.4.0/24
172.16.5.0/24
172.16.6.0/24
172.16.7.0/24
剩下这6个网段作为R2-7的业务网段。
 

2.配置IP地址

R1:

[R1]int g0/0/0
[R1-GigabitEthernet0/0/0]ip address 12.1.1.1 24
[R1]int LoopBack 0
[R1-LoopBack0]ip address 1.1.1.1 32

R2:

[R2]int g0/0/0	
[R2-GigabitEthernet0/0/0]ip address 12.1.1.1 24
[R2-GigabitEthernet0/0/0]int g0/0/1	
[R2-GigabitEthernet0/0/1]ip address 172.16.0.1 30
[R2-GigabitEthernet0/0/0]int g0/0/2	
[R2-GigabitEthernet0/0/2]ip address 172.16.0.9 30
[R2]int LoopBack 0
[R2-LoopBack0]ip address 172.16.1.2 32

R3:

[R3]int g0/0/0	
[R3-GigabitEthernet0/0/0]ip address 172.16.0.2 30
[R3-GigabitEthernet0/0/0]int g0/0/1	
[R3-GigabitEthernet0/0/1]ip address 172.16.0.5 30
[R3]int LoopBack 0
[R3-LoopBack0]ip address 172.16.1.3 32

R4:

[R4]int g0/0/0	
[R4-GigabitEthernet0/0/0]ip address 172.16.0.6 30
[R4-GigabitEthernet0/0/0]int g0/0/1	
[R4-GigabitEthernet0/0/1]ip address 172.16.0.21 30
[R4]int LoopBack 0
[R4-LoopBack0]ip address 172.16.1.3 32

R5:

[R5]int g0/0/0	
[R5-GigabitEthernet0/0/0]ip address 172.16.0.13 30
[R5-GigabitEthernet0/0/0]int g0/0/1	
[R5-GigabitEthernet0/0/1]ip address 172.16.0.10 30
[R5]int LoopBack 0
[R5-LoopBack0]ip address 172.16.1.5 32

R6:

[R6]int g0/0/0	
[R6-GigabitEthernet0/0/0]ip address 172.16.0.14 30
[R6-GigabitEthernet0/0/0]int g0/0/1	
[R6-GigabitEthernet0/0/1]ip address 172.16.0.17 30
[R6]int LoopBack 0
[R6-LoopBack0]ip address 172.16.1.6 32

R7:

[R7]int g0/0/0	
[R7-GigabitEthernet0/0/0]ip address 172.16.0.22 30
[R7-GigabitEthernet0/0/0]int g0/0/1	
[R7-GigabitEthernet0/0/1]ip address 172.16.0.18 30
[R7-GigabitEthernet0/0/0]int g0/0/2	
[R7-GigabitEthernet0/0/1]ip address 78.1.1.1.1 24
[R7]int LoopBack 0
[R7-LoopBack0]ip address 172.16.1.7 32

R8:

[R7]int g0/0/0
[R7-GigabitEthernet0/0/0]ip address 78.1.1.2 24
[R7]int LoopBack 0
[R7-LoopBack0]ip address 8.8.8.8 32

2.将AS2中的IGP协议启动并宣告

R2:

[R2]ospf 1
[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
[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
[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
[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
[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
[R7-ospf-1]area 0
[R7-ospf-1-area-0.0.0.0]network 172.16.0.0 0.0.255.255

4.启动BGP协议并建立邻居关系

R1:

[R1]bgp 1
[R1-bgp]router-id 1.1.1.1
[R1-bgp]peer 12.1.1.2 as-number 2

R2:

[R2]bgp 64512
[R2-bgp]router-id 172.16.1.2
[R2-bgp]confederation id 2
[R2-bgp]peer 12.1.1.1 as-number 1
[R2-bgp]peer 172.16.1.3 as-number 64512
[R2-bgp]peer 172.16.1.3 connect-interface LoopBack 0
[R2-bgp]confederation peer-as 64513
[R2-bgp]peer 172.16.1.5 as-number 64513
[R2-bgp]peer 172.16.1.5 ebgp-max-hop 2
[R2-bgp]peer 172.16.1.5 connect-interface LoopBack 0

R3:

[R3]bgp 64512
[R3-bgp]router-id 172.16.1.3
[R3-bgp]peer 172.16.1.2 as-number 64512
[R3-bgp]peer 172.16.1.2 connect-interface LoopBack 0
[R3-bgp]peer 172.16.1.4 as-number 64512
[R3-bgp]peer 172.16.1.4 connect-interface LoopBack 0

R4:

[R4]bgp 64512
[R4-bgp]router-id 172.16.1.4
[R4-bgp]confederation id 2
[R4-bgp]peer 172.16.1.3 as-number 64512
[R4-bgp]peer 172.16.1.3 connect-interface LoopBack 0
[R4-bgp]confederation peer-as 64513
[R4-bgp]peer 172.16.1.7 as-number 64513
[R4-bgp]peer 172.16.1.7 ebgp-max-hop 2
[R4-bgp]peer 172.16.1.7 connect-interface LoopBack 0

R5:

[R5]bgp 64513
[R5-bgp]router-id 172.16.1.5
[R5-bgp]confederation id 2
[R5-bgp]confederation peer-as 64512
[R5-bgp]peer 172.16.1.2 as-number 64512
[R5-bgp]peer 172.16.1.2 ebgp-max-hop 2
[R5-bgp]peer 172.16.1.2 connect-interface LoopBack 0
[R5-bgp]peer 172.16.1.6 as-number 64513
[R5-bgp]peer 172.16.1.6 connect-interface LoopBack 0

R6:

[R6]bgp 64513
[R6-bgp]router-id 172.16.1.6
[R6-bgp]confederation id 2
[R6-bgp]peer 172.16.1.5 as-number 64513
[R6-bgp]peer 172.16.1.5 connect-interface LoopBack 0
[R6-bgp]peer 172.16.1.7 as-number 64513
[R6-bgp]peer 172.16.1.7 connect-interface LoopBack 0

R7:

[R7]bgp 64513
[R7-bgp]router-id 172.16.1.7
[R7-bgp]peer 172.16.1.6 as-number 64513
[R7-bgp]peer 172.16.1.6 connect-interface LoopBack 0
[R7-bgp]confederation peer-as 64512
[R7-bgp]peer 172.16.1.4 as-number 64512
[R7-bgp]peer 172.16.1.4 ebgp-max-hop 2
[R7-bgp]peer 172.16.1.4 connect-interface LoopBack 0
[R7-bgp]peer 78.1.1.8 as-number 3


R8:

[R8]bgp 3
[R8-bgp]router-id 8.8.8.8
[R8-bgp]peer 78.1.1.7 as-number 2

5.宣告业务网段

R1:

[R1-bgp]network 10.1.1.0 24

在R2上查看BGP表发现学到R1的业务网段是优的,但是R3和R5上学到的却是不优的,所以需要修改下一跳IP地址;

R2:

[R2-bgp]peer 172.16.1.3 next-hop-local
[R2-bgp]peer 172.16.1.5 next-hop-local

在R3和R6上写反射器

R3:

[R3-bgp]peer 172.16.1.4 reflect-client

R6:

[R6-bgp]peer 172.16.1.7 reflect-client

宣告R8的业务网段,并在R7上修改下一跳

R8:

[R8-bgp]network 10.1.8.0 24

R7:

[R7-bgp]peer 172.16.1.4 next-hop-local
[R7-bgp]peer 172.16.1.6 next-hop-local

在R2,R7上宣告聚合后的用户接口网络

R2:

[R2]ip route-static 172.16.0.0 21 NULL 0
[R2]bgp 64512
[R2-bgp]network 172.16.0.0 21

R7:

[R7]ip route-static 172.16.0.0 21 NULL 0
[R7]bgp 64513
[R7-bgp]network 172.16.0.0 21

 四.实验结果

HCIP——BGP小综合实验_第2张图片

 HCIP——BGP小综合实验_第3张图片

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