diff --git a/perl-xCAT/xCAT/ProfiledNodeUtils.pm b/perl-xCAT/xCAT/ProfiledNodeUtils.pm
index aa6190970..3ce61b9d1 100644
--- a/perl-xCAT/xCAT/ProfiledNodeUtils.pm
+++ b/perl-xCAT/xCAT/ProfiledNodeUtils.pm
@@ -543,6 +543,29 @@ sub get_allnode_singleattrib_hash
 
 #-------------------------------------------------------------------------------
 
+=head3 get_db_swtichports
+      Description : Get all records of switch config from a table, then return a string list.
+      Arguments   : $tabname - the table name.
+      Returns     : Reference of the records hash.
+=cut
+
+#-------------------------------------------------------------------------------
+sub get_db_switchports
+{
+    my $class = shift;
+    my $table = xCAT::Table->new("switch");
+    my @attribs = ("switch", "port");
+    my @entries = $table->getAllAttribs(@attribs);
+    my %allrecords;
+    foreach (@entries) 
+    {
+        $allrecords{$_->{'switch'} . "_" . $_->{'port'}} = 0;
+    }
+    return \%allrecords;
+}
+
+#-------------------------------------------------------------------------------
+
 =head3 is_discover_started
       Description : Judge whether profiled nodes discovering is running or not.
       Arguments   : NA
diff --git a/xCAT-server/lib/xcat/plugins/profilednodes.pm b/xCAT-server/lib/xcat/plugins/profilednodes.pm
index fa5ee2d47..50309d5a0 100644
--- a/xCAT-server/lib/xcat/plugins/profilednodes.pm
+++ b/xCAT-server/lib/xcat/plugins/profilednodes.pm
@@ -37,6 +37,7 @@ my %allnicips;
 my %allracks;
 my %allchassis;
 my %allswitches;
+my %all_switchports;
 
 # The array of all chassis which is special CMM 
 my %allcmmchassis;
@@ -368,6 +369,10 @@ Usage:
     $recordsref = xCAT::ProfiledNodeUtils->get_allnode_singleattrib_hash('switches', 'switch');
     %allswitches = %$recordsref;
 
+    # Get all switches_switchport
+    $recordsref = xCAT::ProfiledNodeUtils->get_db_switchports();
+    %all_switchports = %$recordsref;
+
     # MAC records looks like: "01:02:03:04:05:0E!node5│01:02:03:05:0F!node6-eth1". We want to get the real mac addres.
     foreach (keys %allmacs){
         my @hostentries = split(/\|/, $_);
@@ -1965,6 +1970,14 @@ sub validate_node_entry{
             if (!($node_entry{$_} =~ /^\d+$/)){
                 $errmsg .= "Specified port $node_entry{$_} is invalid\n";
             }
+            # now, we need to check "swith_switchport" string list to avoid duplicate config
+            my $switch_port = $node_entry{'switch'} . "_" . $node_entry{$_};
+            if (exists $all_switchports{$switch_port}){
+                $errmsg .= "Specified switch port $node_entry{$_} already exists in the database or in the nodeinfo file. You must use a new switch port.\n";
+            }else{
+            # after checking, add this one into all_switchports 
+            $all_switchports{$switch_port} = 0;
+            }
         }elsif ($_ eq "rack"){
             if (! exists $allracks{$node_entry{$_}}){
                 $errmsg .= "Specified rack $node_entry{$_} is not defined\n";