Use route-maps to filter incoming updates from a BGP peer. In this example, a prefix list named myPrefixList on R1 is configured to deny entry of any routes with the IP address 3ffe:12::/32. To test the filter, R2 is configured to generate network prefixes 3ffe:11::/48 and 3ffe:12::/48. To verify, use the show bgp ipv6 command on R1; it displays R1 receiving only the 3ffe:11::/48 network prefix.