diff --git a/xCAT-server-2.0/lib/xcat/plugins/DNSsn.pm b/xCAT-server-2.0/lib/xcat/plugins/DNSsn.pm
index 0a0f2a142..e44ad6edd 100644
--- a/xCAT-server-2.0/lib/xcat/plugins/DNSsn.pm
+++ b/xCAT-server-2.0/lib/xcat/plugins/DNSsn.pm
@@ -42,7 +42,7 @@ sub handled_commands
         {
 
             # service needed on this Service Node
-            $rc = &setup_DNS($nodename);                   # setup DNS
+            $rc = &setup_DNS();                            # setup DNS
             if ($rc == 0)
             {
                 xCAT::Utils->update_xCATSN($service);
@@ -86,127 +86,31 @@ sub process_request
 #-----------------------------------------------------------------------------
 sub setup_DNS
 {
-    my ($nodename) = @_;
 
-    # backup the original
-    if ((-e "/etc/named.conf") && (!(-e "/etc/named.conf.ORIG")))
+    # turn DNS on
+
+    $cmd = "chkconfig named on";
+    xCAT::Utils->runcmd($cmd, -1);
+    if ($::RUNCMD_RC != 0)
     {
-        `cp /etc/named.conf /etc/named.conf.ORIG`;
-    }
-
-    # read DB for nodeinfo
-    my $master;
-    my $os;
-    my $arch;
-    my $retdata = xCAT::Utils->readSNInfo($nodename);
-    if ($retdata->{'arch'})
-    {    # no error
-        $master = $retdata->{'master'};
-        $os     = $retdata->{'os'};
-        $arch   = $retdata->{'arch'};
-
-        # build the named.conf file
-        my $namedconfig = "/etc/named.conf";
-        my @nameconfigtemplate;
-        $nameconfigtemplate[0] = "options {directory \"/var/named\";\n";
-        $nameconfigtemplate[1] =
-          "     dump-file \"/var/named/data/cache_dump.db\";\n";
-        $nameconfigtemplate[2] =
-          "      statistics-file \"/var/named/data/named_stats.txt\";\n";
-        $nameconfigtemplate[3] = "     forward only;\n";
-        $nameconfigtemplate[4] = "     forwarders{$master;\n      };\n";
-        $nameconfigtemplate[5] = "};\n";
-        $nameconfigtemplate[6] = "\n";
-        $nameconfigtemplate[7] = "controls {\n";
-        $nameconfigtemplate[8] =
-          "    inet 127.0.0.1 allow { localhost; } keys { rndckey; };\n";
-        $nameconfigtemplate[9]  = "};\n";
-        $nameconfigtemplate[10] = "\n";
-        $nameconfigtemplate[11] = "zone \".\" IN {\n";
-        $nameconfigtemplate[12] = "   type hint;\n";
-        $nameconfigtemplate[13] = "   file \"named.ca\";\n";
-        $nameconfigtemplate[14] = "};\n\n";
-        $nameconfigtemplate[15] = "zone \"localdomain\" IN {\n";
-        $nameconfigtemplate[16] = "    type master;\n";
-        $nameconfigtemplate[17] = "    file \"localdomain.zone\";\n";
-        $nameconfigtemplate[18] = "    allow-update { none; };\n";
-        $nameconfigtemplate[19] = "};\n";
-        $nameconfigtemplate[20] = "\n";
-        $nameconfigtemplate[21] = "zone \"localhost\" IN {\n";
-        $nameconfigtemplate[22] = "    type master;\n";
-        $nameconfigtemplate[23] = "    file \"localhost.zone\";\n";
-        $nameconfigtemplate[24] = "    allow-update { none; };\n";
-        $nameconfigtemplate[25] = "};\n";
-        $nameconfigtemplate[26] = "\n";
-        $nameconfigtemplate[27] = "zone \"0.0.127.in-addr.arpa\" IN {\n";
-        $nameconfigtemplate[28] = "    type master;\n";
-        $nameconfigtemplate[29] = "    file \"named.local\";\n";
-        $nameconfigtemplate[30] = "    allow-update { none; };\n";
-        $nameconfigtemplate[31] = "};\n";
-        $nameconfigtemplate[32] = "\n";
-        $nameconfigtemplate[33] =
-          "zone \"0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.ip6.arpa\" IN { \n";
-        $nameconfigtemplate[34] = "    type master; \n";
-        $nameconfigtemplate[35] = "    file \"named.ip6.local\";\n";
-        $nameconfigtemplate[36] = "    allow-update { none; };\n";
-        $nameconfigtemplate[37] = "};\n";
-        $nameconfigtemplate[38] = "\n";
-        $nameconfigtemplate[39] = "zone \"255.in-addr.arpa\" IN {\n ";
-        $nameconfigtemplate[40] = "    type master; \n";
-        $nameconfigtemplate[41] = "    file \"named.broadcast\";\n";
-        $nameconfigtemplate[42] = "    allow-update { none; };\n";
-        $nameconfigtemplate[43] = "};\n";
-        $nameconfigtemplate[44] = "\n";
-        $nameconfigtemplate[45] = "zone \"0.in-addr.arpa\" IN {\n ";
-        $nameconfigtemplate[46] = "    type master;\n ";
-        $nameconfigtemplate[47] = "     file \"named.zero\";\n";
-        $nameconfigtemplate[48] = "    allow-update { none; };\n";
-        $nameconfigtemplate[49] = "};\n";
-        $nameconfigtemplate[50] = "\n";
-        $nameconfigtemplate[51] = "include \"/etc/rndc.key\";\n ";
-
-        open(DNSCFG, ">$namedconfig")
-          or xCAT::MsgUtils->message('S',
-                                    "Cannot open $named.conf for DNS setup \n");
-        print DNSCFG @nameconfigtemplate;
-        close DNSCFG;
-
-        # turn DNS on
-
-        $cmd = "cp /etc/named.conf /var/named/chroot/etc";
-        xCAT::Utils->runcmd($cmd, -1);
-        if ($::RUNCMD_RC != 0)
-        {
-            xCAT::MsgUtils->message("S", "Error from $cmd");
-            return 1;
-        }
-        $cmd = "chkconfig named on";
-        xCAT::Utils->runcmd($cmd, -1);
-        if ($::RUNCMD_RC != 0)
-        {
-            xCAT::MsgUtils->message("S", "Error from $cmd");
-            return 1;
-        }
-        $cmd = "service named stop";
-        xCAT::Utils->runcmd($cmd, -1);
-        if ($::RUNCMD_RC != 0)
-        {
-            xCAT::MsgUtils->message("S", "Error from $cmd");
-            return 1;
-        }
-        $cmd = "service named start";
-        xCAT::Utils->runcmd($cmd, -1);
-        if ($::RUNCMD_RC != 0)
-        {
-            xCAT::MsgUtils->message("S", "Error from $cmd");
-            return 1;
-        }
-
-    }
-    else
-    {    # error reading DB
+        xCAT::MsgUtils->message("S", "Error from $cmd");
         return 1;
     }
+    $cmd = "service named stop";
+    xCAT::Utils->runcmd($cmd, -1);
+    if ($::RUNCMD_RC != 0)
+    {
+        xCAT::MsgUtils->message("S", "Error from $cmd");
+        return 1;
+    }
+    $cmd = "service named start";
+    xCAT::Utils->runcmd($cmd, -1);
+    if ($::RUNCMD_RC != 0)
+    {
+        xCAT::MsgUtils->message("S", "Error from $cmd");
+        return 1;
+    }
+
     return 0;
 }
 1;