Written By——Devin Liu BGP E-mail：devinliu1991@163.com
6.Adj_RIBs_Out .......................................................................................................................................................................................................... 34
三.路由本地注入 .................................................................................................................................................................................................................. 35
1.路由注入方式 ........................................................................................................................................................................................................... 35
2.BGP Auto-summary ............................................................................................................................................................................................. 35
3.BGP 路由注入 IGP 的限制 ..................................................................................................................................................................................... 36
四.BGP 路由通告与回收机制 ............................................................................................................................................................................................ 38
1.更新路由 .................................................................................................................................................................................................................... 38
2.更新路径 .................................................................................................................................................................................................................... 38
3.回收路由 .................................................................................................................................................................................................................... 39
五.Cisco BGP Table Version ........................................................................................................................................................................................... 40
1.意义 ............................................................................................................................................................................................................................ 40
2.Table Version 的类型 ............................................................................................................................................................................................ 40
3.实现 ............................................................................................................................................................................................................................ 40
4.查看命令 .................................................................................................................................................................................................................... 42
六.Peer Group .................................................................................................................................................................................................................... 43
1.Peer Group .............................................................................................................................................................................................................. 43
2.Cisco Peer Templates .......................................................................................................................................................................................... 45
七.BGP 策略实施 ................................................................................................................................................................................................................. 47
1.IGP 策略实施 ............................................................................................................................................................................................................ 47
2.BGP ............................................................................................................................................................................................................................ 47
【二】BGP Attributes ............................................................................................................................................................................................................... 49
一.概述 ................................................................................................................................................................................................................................... 49
1.BGP 属性的意义 ...................................................................................................................................................................................................... 49
2.BGP 属性的组成 ...................................................................................................................................................................................................... 49
二.ORIGIN ............................................................................................................................................................................................................................ 51
1.意义 ............................................................................................................................................................................................................................ 51
2.类型 ............................................................................................................................................................................................................................ 51
3.修改 ORIGIN Code ................................................................................................................................................................................................ 51
三.AS_PATH ......................................................................................................................................................................................................................... 53
1.意义 ............................................................................................................................................................................................................................ 53
2.作用 ............................................................................................................................................................................................................................ 53
3.IOS 支持的 AS_PATH 类型——Attributes Value .......................................................................................................................................... 53
4.实现 ............................................................................................................................................................................................................................ 53
5.修改 AS_PATH ......................................................................................................................................................................................................... 55
四.NEXT_HOP ..................................................................................................................................................................................................................... 59
1.意义 ............................................................................................................................................................................................................................ 59
2.下一跳判断机制 ....................................................................................................................................................................................................... 59
3.修改 NEXT_HOP ..................................................................................................................................................................................................... 60
五.MULTI_EXIT_DISC ........................................................................................................................................................................................................ 62
1.概述 ............................................................................................................................................................................................................................ 62
2.实现 ............................................................................................................................................................................................................................ 62
六.LOCAL_PREF .................................................................................................................................................................................................................. 65
1.概述 ............................................................................................................................................................................................................................ 65
2.实现 ............................................................................................................................................................................................................................ 65
七.ATOMIC_AGGREGATE ............................................................................................................................................................................................... 67
1.意义 ............................................................................................................................................................................................................................ 67
2.实现 ............................................................................................................................................................................................................................ 67
八.AGGREGATOR .............................................................................................................................................................................................................. 68
1.意义 ............................................................................................................................................................................................................................ 68
2.作用范围 .................................................................................................................................................................................................................... 68
八.COMMUNITY ................................................................................................................................................................................................................ 69
1.概述 ............................................................................................................................................................................................................................ 69
2.分类 ............................................................................................................................................................................................................................ 69
3.Well-known communities ................................................................................................................................................................................. 69
4.设置 Community .................................................................................................................................................................................................... 70
5.Community 的一般设置流程 ............................................................................................................................................................................... 73
【三】Decision Process ........................................................................................................................................................................................................... 74
一.基础 ................................................................................................................................................................................................................................... 74
