diff --git a/xCAT-server/lib/xcat/plugins/ddns.pm b/xCAT-server/lib/xcat/plugins/ddns.pm
index 8a7b83f08..09c0e12b6 100644
--- a/xCAT-server/lib/xcat/plugins/ddns.pm
+++ b/xCAT-server/lib/xcat/plugins/ddns.pm
@@ -422,12 +422,6 @@ sub process_request {
                 unlink $_;
             }
         }
-
-        if ($::XCATSITEVALS{useDNSonMN})
-        {
-            create_resolvconf_on_mn($ctx);
-        }
-        
         #We manipulate local namedconf
         $ctx->{dbdir} = get_dbdir();
         $ctx->{zonesdir} = get_zonesdir();
@@ -1016,72 +1010,4 @@ sub makedns_usage
     return 0;
 }
 
-sub create_resolvconf_on_mn
-{
-    my $ctx = shift;
-    
-    my $resolvlocation = "/etc/resolv.conf";
-    if ( -e $resolvlocation)
-    {
-       # backup the existing /etc/resolv.conf on mn if it's there
-       system("mv $resolvlocation $resolvlocation.xcatbak");
-       
-       # put the foreign nameserver in site.forwarders
-       
-       # get forwarders which are the nameserver entries in /etc/resolv.conf
-       # don't use if the address is this machine (Management Node)
-       my $forwarders;
-       # find out the names for the Management Node
-       my @MNnodeinfo   = xCAT::Utils->determinehostname;
-       my $MNnodename   = pop @MNnodeinfo;                  # hostname
-       my @MNnodeipaddr = @MNnodeinfo;                      # ipaddresses
-
-       my @names; 
-       my @tmpnames =
-       xCAT::Utils->runcmd("/bin/grep ^[^#]*nameserver $resolvlocation.xcatbak | awk '{print \$2}'", -1);
-       foreach my $ip (@tmpnames) 
-       {
-           if (!grep(/$ip/, @MNnodeipaddr))
-           {     # if not the MN
-               push @names,$ip;  # add it as a forwarder
-           }
-        }
-        if (@names)
-        {
-            if ($ctx->{forwarders})
-            {
-                my $curforwarders = join(',', @{$ctx->{forwarders}});
-
-                foreach my $name (@names)
-                {
-                    if (!grep(/$name/, $curforwarders))
-                    {
-                        $forwarders = $curforwarders . ",$name";
-                        push @{$ctx->{forwarders}}, $name;
-                    }
-                }
-            }
-            else
-            {
-                $forwarders = join(',', @names);
-                $ctx->{forwarders} = \@names;
-            }
-            system("$::XCATROOT/sbin/chtab key=forwarders site.value=$forwarders;");
-        }
-    }
-    # create the new /etc/resolv.conf pointing to mn itself
-    my @newresolv;
-    push @newresolv, "search $ctx->{domain}\n";
-    push @newresolv, "nameserver $::XCATSITEVALS{master}\n";
-    my $newresolvconf;
-    open($newresolvconf,">",$resolvlocation);
-    flock($newresolvconf,LOCK_EX);
-    seek($newresolvconf,0,0);
-    truncate($newresolvconf,0);
-    for my $l  (@newresolv) { print $newresolvconf $l; }
-    flock($newresolvconf,LOCK_UN);
-    close($newresolvconf);
-    return;
-}
-
 1;