BGP基本配置

BGP个人实验记录

实验拓扑

按照拓扑图

R1-2-3为AS200，运行OSPF实现内网互通

R4为AS100,R5为AS300，使用环回口模拟业务网段，并宣告进bgp

R1配置

sys
sys R1

int g0/0/0
ip add 192.168.12.1 24
int g0/0/1
ip add 192.168.14.1 24

ospf 1 router-id 1.1.1.1
area 0
network 192.168.12.0 0.0.0.255
quit
quit   

bgp 200
router-id 1.1.1.1
peer 192.168.14.4 as 100
peer 192.168.23.3 as 200
peer 192.168.23.3 next-hop-local

peer 192.168.12.2 as 200
peer 192.168.12.2 next-hop-local
 

R2配置

sys
sys R2

int g0/0/0
ip add 192.168.12.2 24
int g0/0/1
ip add 192.168.23.2 24

ospf 1 router-id 2.2.2.2
area 0
network 192.168.12.0 0.0.0.255
network 192.168.23.0 0.0.0.255
quit

bgp 200
router-id 2.2.2.2
peer 192.168.12.1 as 200
peer 192.168.23.3 as 200

R3配置

sys
sys R3

int g0/0/0
ip add 192.168.23.3 24
int g0/0/1
ip add 192.168.35.3 24

ospf 1 router-id 3.3.3.3
area 0
network 192.168.23.0 0.0.0.255
quit
quit

bgp 200
router-id 3.3.3.3

peer 192.168.12.1 as 200    
peer 192.168.12.1 next-hop-local
peer 192.168.35.5 as 300  

peer 192.168.23.2 as 200
peer 192.168.23.2 next-hop-local 

R4配置

sys
sys R4

int g0/0/0
ip add 192.168.14.4 24
int lo0
ip add 10.10.4.4 32

bgp 100
router-id 4.4.4.4
peer 192.168.14.1 as 200    
network 10.10.4.4 32     
 

R5配置

sys
sys R5
int g0/0/0
ip add 192.168.35.5 24
int lo0
ip add 10.10.5.5 32
 
bgp 300
router-id 5.5.5.5
peer 192.168.35.3 as 200   
network 10.10.5.5 32

查看邻居情况,以R1为例

display bgp peer

显示Established说明邻居已建立

查看bgp路由表情况

display bgp routing-table

测试业务网段互通

由于BGP只传递了业务网段路由，直接ping不通，必须使用-a带源PING，才能测试是否连通