Perform the following operations on the receive end of the BGP route. The NE40E is used as an example:

bgp 100

peer 172.10.10.2 as-number 100

#

ipv4-family unicast

undo synchronization

preference route-policy 2 //Reference a route priority policy.

peer 172.10.10.2 enable

peer 172.10.10.2 route-policy 1 import //Community attribute (5000:200).

#

route-policy 1 permit node 1

apply community 5000:200

#

ip community-filter basic antiddos permit 5000:200 //Define the community attribute filtering policy.

#

route-policy 2 permit node 1

if-match community-filter antiddos //Match the community attribute.

apply preference 4 //Re-specify the route priority.

You can run the display bgp routing-table community command to view the community attributes that are used.