Routing – Route Filters
Chain:XXX-OUT
Prefix:这里可选填写目标IP段,如果不填写，每个peer都广播
Prefix Length:32
Aciton:accept
set distance:255
set type:blackhole
append bgp communities:xxx:xxx(社区参数)

广播/32 IP
Routing – BGP – Networks
加入x.x.x.x/32

验证:
命令行输入
/routing bgp advertisements print peer=XXX detail
查看是否广播成功