BGP实验

一、实验拓扑

二、实验要求

1. r1~r8每台路由器的环回可以互相访问

三、实验步骤

1. 分配ip地址

r1

[r1]int lo0
[r1-LoopBack0]ip add 1.1.1.1 24
[r1-LoopBack0]int g0/0/1
[r1-GigabitEthernet0/0/1]ip add 12.1.1.1 24

r2

[r2]int g0/0/0
[r2-GigabitEthernet0/0/0]ip add 12.1.1.2 24
[r2]int lo0
[r2-LoopBack0]ip add 172.16.1.2 32
[r2]int g0/0/1
[r2-GigabitEthernet0/0/1]ip add 172.16.0.1 30
[r2-GigabitEthernet0/0/1]int g0/0/2
[r2-GigabitEthernet0/0/2]ip add 172.16.0.9 30

r3

[r3]int lo0
[r3-LoopBack0]ip add 172.16.1.3 32
[r3]int g0/0/0
[r3-GigabitEthernet0/0/0]ip add 172.16.0.2 30
[r3-GigabitEthernet0/0/0]int g0/0/1
[r3-GigabitEthernet0/0/1]ip add 172.16.0.5 30

r4

[r4]int lo0
[r4-LoopBack0]ip add 172.16.1.4 32
[r4]int g0/0/0 
[r4-GigabitEthernet0/0/0]ip add 172.16.0.6 30
[r4]int g0/0/2
[r4-GigabitEthernet0/0/2]ip add 172.16.0.21 30

r5

[r5]int lo0
[r5-LoopBack0]ip add 172.16.1.5 32
[r5]int lo0
[r5-LoopBack0]ip add 172.16.1.5 32
[r5]int g0/0/2 
[r5-GigabitEthernet0/0/2]ip add 172.16.0.10 30
[r5-GigabitEthernet0/0/2]int g0/0/1
[r5-GigabitEthernet0/0/1]ip add 172.13.0.13 30

r6

[r6]int lo0
[r6-LoopBack0]ip add 172.16.1.6 32
[r6]int g0/0/0
[r6-GigabitEthernet0/0/0]ip add 172.16.0.14 30
[r6-GigabitEthernet0/0/0]int g0/0/1
[r6-GigabitEthernet0/0/1]ip add 172.16.0.17 30

r7

[r7]int lo0
[r7-LoopBack0]ip add 172.16.1.7 32
[r7]int g0/0/1
[r7-GigabitEthernet0/0/1]ip add 78.1.1.1 24
[r7]int g0/0/0
[r7-GigabitEthernet0/0/0]ip add 172.16.0.18 30
[r7-GigabitEthernet0/0/0]int g0/0/2 
[r7-GigabitEthernet0/0/2]ip add 172.16.0.22 30

r8

[r8]int g0/0/0
[r8-GigabitEthernet0/0/0]ip add 78.1.1.2 24
[r8-GigabitEthernet0/0/0]int lo0
[r8-LoopBack0]ip add 8.8.8.8 24

2. 启OSPF协议

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]net 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

3.启 BGP协议

1）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 2.2.2.2
[r2-bgp]confederation id 2
[r2-bgp]confederation peer-as 64513
[r2-bgp]peer 12.1.1.1 as-number 1

r3

[r3]bgp 64512
[r3-bgp]router-id 3.3.3.3
[r3-bgp]confederation id 2
[r3-bgp]peer 172.16.1.2 as-number 64512
[r3-bgp]peer 172.16.1.2 connect-interface lo 0
[r3-bgp]peer 172.16.1.4 as-number 64512
[r3-bgp]peer 172.16.1.4 connect-interface lo 0

r4

[r4]bgp 64512
[r4-bgp]router-id 4.4.4.4
[r4-bgp]confederation id 2
[r4-bgp]peer 172.16.1.3 as-number 64512
[r4-bgp]peer 172.16.1.3 connect-interface lo0
[r4-bgp]peer 172.16.1.7 as-number 64512
[r4-bgp]peer 172.16.1.7 connect-interface lo0
[r4-bgp]peer 172.16.1.7 ebgp-max-hop 2

r5

[r5]bgp 64513
[r5-bgp]ro 
[r5-bgp]router-id 5.5.5.5
[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 connect-interface lo0
[r5-bgp]peer 172.16.1.2 ebgp-max-hop 2
[5-bgp]peer 172.16.1.6 as-number 64513
[r5-bgp]peer 172.16.1.6 connect-interface lo0

r6

[r6]bgp 64513
[r6-bgp]router-id 6.6.6.6
[r6-bgp]confederation id 2
[r6-bgp]peer 172.16.1.5 as-number 64513
[r6-bgp]peer 172.16.1.5 connect-interface lo0
[6-bgp]peer 172.16.1.7 as-number 64513
[r6-bgp]peer 172.16.1.7 connect-interface lo0

r7

[r7]bgp 64513
[r7-bgp]router-id 7.7.7.7
[r7-bgp]confederation id 2
[r7-bgp]confederation peer-as 64512
[r7-bgp]peer 172.16.1.6 as-number 64513
[r7-bgp]peer 172.16.1.6 connect-interface lo0
[r7-bgp]peer 172.16.1.4 as-number 64512
[r7-bgp]peer 172.16.1.4 connect-interface lo0
[r7-bgp]peer 172.16.1.4 ebgp-max-hop 2
[r7-bgp]peer 78.1.1.2 as-number 3

r8

[r8]bgp 3
[r8-bgp]router-id 8.8.8.8
[r8-bgp]peer 78.1.1.1 as-number 2

2）宣告r1和r8的环回

r1

[r1]bgp 1
[r1-bgp]network 1.1.1.0 24

r2上修改下一跳

[r2]bgp 64512
[r2-bgp]peer 172.16.1.3 next-hop-local
[r2-bgp]peer 172.16.1.5 next-hop-local

r3给r4做反射(配置bgp路由反射器)

[r3]bgp 64512
[r3-bgp]peer 172.16.1.4 reflect-client

r6给r7做反射(配置bgp路由反射器)
(备份)

[r6]bgp 64513
[r6-bgp]peer 172.16.1.7 reflect-client

此时所有路由器均学到了r1的环回

r8

[r8]bgp 3 
[r8-bgp]network 8.8.8.0 24

r7上修改下一跳

[r7]bgp 64513
[r7-bgp]peer 172.16.1.4 next-hop-local
[r7-bgp]peer 172.16.1.6 next-hop-local

此时所有路由器均学到r8的环回

3） r2和r7上做路由汇总再进行宣告

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

本文地址：https://blog.csdn.net/weixin_45756724/article/details/107290037