002.-BGP基本配置.pptVIP

Objectives Upon completing this lesson, you will be able to: Describe basic Border Gateway Protocol operations(描述BGP配置) Identify Border Gateway Protocol neighbor states(识别BGP邻居状态.) Use Border Gateway Protocol show, debug, and clear commands (使用BGP查看,调试,重置命令) BGP Commands BGP neighbor Command BGP network Command 案例:在多个AS间配置BGP.(P293) 客户要求:配置BGP来与两家服务供应商交换路由信息;以实现较强的容错的能力. 方法: 1,保证路由器直连. 2,配置ISP1,ISP2路由器.(实际中不可操作) Router bgp 100 Neighbor 192.168.1.6 remote-as 24 Network 10.0.0.0 3,配置公司的边界路由器: Router bgp 24 Neighbor 192.168.1.5 remote-as 100 Neighbor 172.16.1.5 remote-as 200 Network 200.100.50.0 4,show ip bgp\\观察到什么情况?PING可达吗? 5,请在多台路由器上实现BGP的互联,看还需要什么条件? BGP Example Configuration BGP互连特性 Basic Border Gateway Protocol Operations ? 2003, Cisco Systems, Inc. All rights reserved. * router bgp autonomous-system(64512-65535) Router(config)# This command, with no subcommands, does not activate BGP.(还需要其他子命令配合.) Only one instance of BGP can be configured on the router at a single time.(仅一个BGP进程,边界是链路.) The autonomous system number identifies the autonomous system to which the router belongs. The autonomous system number in this command is compared to the autonomous system numbers listed in neighbor statements to determine if the neighbor is an internal or external neighbor.(确定邻居关系) neighbor {ip-address | peer-group-name} remote-as autonomous-system Router(config-router)# The neighbor command activates a BGP session with this neighbor.(只有指定邻居双方,才能建立会话.) The term remote-as shows what AS this neighbor is in. This AS number is used to determine if the neighbor is internal or external.(邻居AS号一样,为IBGP;不一样为EBGP.) This command is used for both external and internal neighbors. The IP address specified is the destination address of BGP packets going to this neighbor.(TCP连接或环回口地址.) This router must have an IP pathway to reach this neighbor before it can set up a BGP relationship. IBGP Peering Issue Example: BGP neighbor Command network network-number [mask network-mask] Router(c