BGP 标准配置_原创文档.pdf

9.1.ConfiguringBGP

提问在网络中启用BGP/SPAN

回答

Route1在AS65500中

Router1#configureterminal

Enterconfigurationcommands,oneperline.EndwithCNTL/Z.

Router1(config)#interfaceSerial0

Router1(config-if)#ipaddress192.168.55.6255.255.255.252

Router1(config-if)#exit

Router1(config)#routerbgp65500

Router1(config-router)#network192.168.1.0

Router1(config-router)#neighbor192.168.55.5remote-as65501

Router1(config-router)#nosynchronization

Router1(config-router)#exit

Router1(config)#end

Router1#

Router2在AS65501中

Router2#configureterminal

Enterconfigurationcommands,oneperline.EndwithCNTL/Z.

Router2(config)#interfaceSerial0

Router2(config-if)#ipaddress192.168.55.5255.255.255.252

Router2(config-if)#exit

Router2(config)#routerbgp65501

Router2(config-router)#network172.25.17.0mask255.255.255.0

Router2(config-router)#neighbor192.168.55.6remote-as65500

Router2(config-router)#nosynchronization

Router2(config-router)#exit

Router2(config)#end

Router2#

注释在对BGP验证的时候比较有用的命令是

Router1#showipbgpsummary

BGProuteridentifier192.168.99.5,localASnumber65500

BGPtableversionis7,mainroutingtableversion7

4networkentriesand4pathsusing484bytesofmemory

2BGPpathattributeentriesusing196bytesofmemory

BGPactivity11/7prefixes,11/7paths

NeighborVASMsgRcvdMsgSentTblVerInQOutQ

Up/DownState/PfxRcd

192.168.55.54655011718700

00:12:382

172.25.2.246553152752600021:05:23

Active

Router1#

需要注意的是理想状态是State里面是数字，尽管是Active也不代表是配置正

常，反而是配置出现错误。通过neighbor172.20.1.2update-sourceLoopback0

命令来限制BGP数据包源地址为回环地址，但要确保此地址的连通性

9.2.使用eBGPMultihop

提问配置外部BGP，但是不是直连的路由器

回答

Router1#