A. For a locally advertised route, configure a routing policy. The policy takes effect before the route is added to the BGP routing table.
B. The filtering relationship between the nodes of the Route-Policy is "OR", that is, the Route-Policy can be passed with a node filter only.
C. When receiving a route from a BGP peer, perform a routing policy to filter unwanted BGP routes. These routes are not added to the local BGP routing table.
D. In the same node of Route-Policy, the relationship of multiple if-match clauses for different attributes is "OR".
