BGP 团体属性过滤器/团体属性列表

 

LSW5转发给LSW6路由时，加上团体属性 no-advertise ，LSW6收到后，对LSW7的出方向应用路由策略，允许 no-advertise 的通过。那么LSW6到底会不会转发给LSW7 ?

 no-advertise    ：Do not advertise to any peer (well-known community attributes)

 

试验结果证明：LSW6没有转发给LSW7

LSW5

route-policy r1 permit node 10
 apply community no-advertise
#
interface LoopBack1
 ip address 1.1.1.1 255.255.255.255
#

bgp 100
 peer 10.1.1.2 as-number 100
 #
 ipv4-family unicast
  undo synchronization
  network 1.1.1.1 255.255.255.255
  peer 10.1.1.2 enable
  peer 10.1.1.2 route-policy r1 export
  peer 10.1.1.2 advertise-community
#

 

LSW6

ip community-filter 1 permit no-advertise

#
route-policy r2 permit node 10
 if-match community-filter 1
#

#
bgp 100
 peer 10.1.1.1 as-number 100
 peer 10.1.1.3 as-number 200
 #
 ipv4-family unicast
  undo synchronization
  peer 10.1.1.1 enable
  peer 10.1.1.3 enable
  peer 10.1.1.3 route-policy r2 export
#

 

LSW7

#
bgp 200
 peer 10.1.1.2 as-number 100
 #
 ipv4-family unicast
  undo synchronization
  peer 10.1.1.2 enable
#

 

 

 

 

 

 

团体属性中的 internet相当于路由策略中的any，用来匹配任何路由。