$results_table->{$$group}}->{$$site_name} = {
                                                sysobjid => "unknown",
                                                snmp_status => "NOT OK",
                                            };

##</code><code>##

results_table->{$$group}}->{$$site_name}->{sysobjid}="unknown;
results_table->{$$group}}->{$$site_name}->{snmp_status}="NOT OK";