elceef@mx240# run show configuration logical-systems BGP policy-options
as-path as197262-path "65100*$";

elceef@mx240# run show configuration logical-systems BGP policy-options               
policy-statement as65100-allowed-prefixes {
    term as65100-routes {
        from {
            route-filter 172.16.0.0/22 exact { 
                local-preference 120;
            }
        }
        then accept;
    }
    term as65100-path {
        from as-path as65100-path;
        then accept;
    }
    then reject;
}

elceef@mx240# run show configuration logical-systems BGP protocols bgp group PEER-NET       
type external;
peer-as 65100;
neighbor 192.168.1.2 {
    import as65100-allowed-prefixes;
}