Through Route Distinguisher (RD), the VPN instance implements the independency of address space and identifies the IPv4 and IPv6 prefixes of the same address space. The RD attribute filter specifies matching conditions for different RDs.
You can use an extended community filter when using the route target (RT) attribute to filter routes in a VPN scenario.
ip rd-filter rd-filter-number { deny | permit } route-distinguisher &<1-10>