BGP聚合实验(1)
【理论准备】
aggregate命令用来在MBGP路由表中创建一条聚合路由。undo aggregate命令用来删除该条聚合路由。
detail-suppressed：仅通告聚合路由。
【实验拓扑及软件】
本文实验采用的交换机是H3C模拟器，下载地址如下：http://forum.h3c.com/forum.php? mod=viewthread&tid=109740&highlight=H3C%E6%A8%A1%E6%8B%9F%E5%99%A8 有兴趣的朋 友可以在论坛上去下载
【实验过程】
一、在R2没有配置聚合前，我们来看R1的BGP路由和路由表：
[R1]dis bgp ro
Total Number of Routes: 12
BGP Local router ID is 10.1.3.1
Status codes: * - valid, > - best, d - damped,
h - history, i - internal, s - suppressed, S - Stale
Origin : i - IGP, e - EGP, ? - incomplete
Network NextHop MED LocPrf PrefVal Path/Ogn
*> 10.1.1.1/32 0.0.0.0 1562 0 ?
*> 10.1.2.0/24 0.0.0.0 0 0 ?
*> 10.1.2.1/32 0.0.0.0 0 0 ?
*> 10.1.2.2/32 0.0.0.0 0 0 ?
*> 10.1.3.0/24 0.0.0.0 0 0 ?
* 10.1.3.2 0 0 200?
*> 10.1.3.1/32 0.0.0.0 0 0 ?
* 10.1.3.2 0 0 200?
*> 10.1.3.2/32 0.0.0.0 0 0 ?
*> 11.1.1.1/32 10.1.3.2 0 0 200?
*> 11.1.2.1/32 10.1.3.2 0 0 200?
*> 11.1.3.1/32 10.1.3.2 0 0 200?
[R1]
[R1]
[R1]dis ip ro
Routing Tables: Public
Destinations : 12 Routes : 12
Destination/Mask Proto Pre Cost NextHop Interface
10.1.1.1/32 OSPF 10 1562 10.1.2.1 S0/6/1
10.1.2.0/24 Direct 0 0 10.1.2.2 S0/6/1
10.1.2.1/32 Direct 0 0 10.1.2.1 S0/6/1
10.1.2.2/32 Direct 0 0 127.0.0.1 InLoop0
10.1.3.0/24 Direct 0 0 10.1.3.1 S0/6/0
10.1.3.1/32 Direct 0 0 127.0.0.1 InLoop0
10.1.3.2/32 Direct 0 0 10.1.3.2 S0/6/0
11.1.1.1/32 BGP 255 0 10.1.3.2 S0/6/0
11.1.2.1/32 BGP 255 0 10.1.3.2 S0/6/0
11.1.3.1/32 BGP 255 0 10.1.3.2 S0/6/0
127.0.0.0/8 Direct 0 0 127.0.0.1 InLoop0
127.0.0.1/32 Direct 0 0 127.0.0.1 InLoop0
二、R2配置聚合后看R1的BGP路由和路由表：
[R2-bgp]aggregate 11.1.0.0 255.255.0.0
[R1]
[R1]dis bgp ro
Total Number of Routes: 13
BGP Local router ID is 10.1.3.1
Status codes: * - valid, > - best, d - damped,
h - history, i - internal, s - suppressed, S - Stale
Origin : i - IGP, e - EGP, ? - incomplete
Network NextHop MED LocPrf PrefVal Path/Ogn
*> 10.1.1.1/32 0.0.0.0 1562 0 ?
*> 10.1.2.0/24 0.0.0.0 0 0 ?
*> 10.1.2.1/32 0.0.0.0 0 0 ?
*> 10.1.2.2/32 0.0.0.0 0 0 ?
*> 10.1.3.0/24 0.0.0.0 0 0 ?
* 10.1.3.2 0 0 200?
*> 10.1.3.1/32 0.0.0.0 0 0 ?
* 10.1.3.2 0 0 200?
*> 10.1.3.2/32 0.0.0.0 0 0 ?
*> 11.1.0.0/16 10.1.3.2 0 0 200?
*> 11.1.1.1/32 10.1.3.2 0 0 200?
*> 11.1.2.1/32 10.1.3.2 0 0 200?
*> 11.1.3.1/32 10.1.3.2 0 0 200?
[R1]
[R1]dis ip ro
Routing Tables: Public
Destinations : 13 Routes : 13
Destination/Mask Proto Pre Cost NextHop Interface
10.1.1.1/32 OSPF 10 1562 10.1.2.1 S0/6/1
10.1.2.0/24 Direct 0 0 10.1.2.2 S0/6/1
10.1.2.1/32 Direct 0 0 10.1.2.1 S0/6/1
10.1.2.2/32 Direct 0 0 127.0.0.1 InLoop0
10.1.3.0/24 Direct 0 0 10.1.3.1 S0/6/0
10.1.3.1/32 Direct 0 0 127.0.0.1 InLoop0
10.1.3.2/32 Direct 0 0 10.1.3.2 S0/6/0
11.1.0.0/16 BGP 255 0 10.1.3.2 S0/6/0
11.1.1.1/32 BGP 255 0 10.1.3.2 S0/6/0
11.1.2.1/32 BGP 255 0 10.1.3.2 S0/6/0
11.1.3.1/32 BGP 255 0 10.1.3.2 S0/6/0
127.0.0.0/8 Direct 0 0 127.0.0.1 InLoop0
127.0.0.1/32 Direct 0 0 127.0.0.1 InLoop0
R2配置聚合并加了detail-suppressed参数后 后看R1的BGP路由和路由表：
[R2-bgp]aggregate 11.1.0.0 255.255.0.0 detail-suppressed
[R1]
[R1]dis bgp ro
Total Number of Routes: 10
BGP Local router ID is 10.1.3.1
Status codes: * - valid, > - best, d - damped,
h - history, i - internal, s - suppressed, S - Stale
Origin : i - IGP, e - EGP, ? - incomplete
Network NextHop MED LocPrf PrefVal Path/Ogn
*> 10.1.1.1/32 0.0.0.0 1562 0 ?
*> 10.1.2.0/24 0.0.0.0 0 0 ?
*> 10.1.2.1/32 0.0.0.0 0 0 ?
*> 10.1.2.2/32 0.0.0.0 0 0 ?
*> 10.1.3.0/24 0.0.0.0 0 0 ?
* 10.1.3.2 0 0 200?
*> 10.1.3.1/32 0.0.0.0 0 0 ?
* 10.1.3.2 0 0 200?
*> 10.1.3.2/32 0.0.0.0 0 0 ?
*> 11.1.0.0/16 10.1.3.2 0 0 200?
[R1]
[R1]dis ip ro
Routing Tables: Public
Destinations : 10 Routes : 10
Destination/Mask Proto Pre Cost NextHop Interface
10.1.1.1/32 OSPF 10 1562 10.1.2.1 S0/6/1
10.1.2.0/24 Direct 0 0 10.1.2.2 S0/6/1
10.1.2.1/32 Direct 0 0 10.1.2.1 S0/6/1
10.1.2.2/32 Direct 0 0 127.0.0.1 InLoop0
10.1.3.0/24 Direct 0 0 10.1.3.1 S0/6/0
10.1.3.1/32 Direct 0 0 127.0.0.1 InLoop0
10.1.3.2/32 Direct 0 0 10.1.3.2 S0/6/0
11.1.0.0/16 BGP 255 0 10.1.3.2 S0/6/0
127.0.0.0/8 Direct 0 0 127.0.0.1 InLoop0
127.0.0.1/32 Direct 0 0 127.0.0.1 InLoop0
【配置文本】