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 #
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