BGP summary-only as-set
router bgp 200aggregate-address 192.1.24.0 255.255.252.0 as-set C# sh ip bgp*>i192.1.24.0 193.1.1.2 0 100 0 100 i
*>i192.1.24.0/22 193.1.1.2 0 100 0 {100,300}i //加后
*>i192.1.24.0/22 193.1.1.2 0 100 0 i //不加
*>i192.1.25.0 193.1.1.2 0 100 0 100 i
*>i192.1.26.0 193.1.1.2 0 100 0 300 i
*>i192.1.27.0 193.1.1.2 0 100 0 300 i
为了发送聚合而隐藏更具体的路由,可选参数summary-only可加到聚合命令上。当更具体的路由不能增加任何益处,如有利于转发流量的路由(如前面讨论的多宿主情况下),此参数被使用。 router bgp 200aggregate-address 192.1.24.0 255.255.252.0 summary-only
*> 197.68.0.0/19 0.0.0.0 32768 i //注意看这里
s> 197.68.1.0 10.10.5.5 0 100 0 (64512) 254 i
s 150.1.10.254 0 0 254 253 i
s> 197.68.4.0 10.10.5.5 0 100 0 (64512) 254 i
s 150.1.10.254 0 0 254 253 i
s> 197.68.5.0 10.10.5.5 0 100 0 (64512) 254 i
s 150.1.10.254 0 0 254 253 i
s> 197.68.21.0 10.10.5.5 0 100 0 (64512) 254 i
s 150.1.10.254 0 0 254 253 i
s> 197.68.22.0 10.10.5.5 0 100 0 (64512) 254 i
s 150.1.10.254 0 0 254 253 i
aggregate-address 192.1.24.0 255.255.252.0 summary-only as-set
Network Next Hop Metric LocPrf Weight Path
*> 197.68.0.0/19 0.0.0.0 100 32768 (64512) 254 i //注意看这里
s> 197.68.1.0 10.10.5.5 0 100 0 (64512) 254 i
s 150.1.10.254 0 0 254 253 i
s> 197.68.4.0 10.10.5.5 0 100 0 (64512) 254 i
s 150.1.10.254 0 0 254 253 i
s> 197.68.5.0 10.10.5.5 0 100 0 (64512) 254 i
s 150.1.10.254 0 0 254 253 i
s> 197.68.21.0 10.10.5.5 0 100 0 (64512) 254 i
s 150.1.10.254 0 0 254 253 i
s> 197.68.22.0 10.10.5.5 0 100 0 (64512) 254 i
s 150.1.10.254 0 0 254 253 i
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