}
try {
vlan.destroy(conn);
Host host = Host.getByUuid(conn, _host.uuid);
host.forgetDataSourceArchives(conn, "pif_" + bridge + "_tx");
host.forgetDataSourceArchives(conn, "pif_" + bridge + "_rx");
host.forgetDataSourceArchives(conn, "pif_" + device + "." + vlannum + "_tx");
host.forgetDataSourceArchives(conn, "pif_" + device + "." + vlannum + "_rx");
} catch (XenAPIException e) {
s_logger.info("Catch " + e.getClass().getName() + ": failed to destory VLAN " + device + " on host " + _host.uuid
+ " due to " + e.toString());