net186-config/lib/20-community-peer.conf

function is_peer_route() {
    if (LOCAL_ASN, 110, 0) ~ bgp_large_community then return false;
    if (LOCAL_ASN, 110, 10) ~ bgp_large_community then return false;
    if bgp_path ~ [ 7018, 3320, 3257, 6830, 3356, 2914, 5511, 3491, 1239, 6453, 6762, 1299, 12956, 701, 6461, 174, 6939] then {
        return false;
    }
    return true;
}

function direct_peer_import_filter(int ASN) {
    if !is_valid() then return false;
    if !is_peer_route() then return false;
    pub_add_communities(ASN, 0);
    pub_preprocess_communities();
    bgp_local_pref = 500 - bgp_path.len * 10;
    return true;
}

function direct_peer_export_filter(int ASN) {
    pub_process_path();
    if !is_valid() then return false;
    if !is_peer_route() then return false;
    pub_add_communities(ASN, 10);
    if pub_process_communities(ASN, 0) then return true;
    else return false;
}