diff --git a/xCAT-server/lib/xcat/plugins/setup.pm b/xCAT-server/lib/xcat/plugins/setup.pm
index ac38e6cd2..2227b320f 100644
--- a/xCAT-server/lib/xcat/plugins/setup.pm
+++ b/xCAT-server/lib/xcat/plugins/setup.pm
@@ -655,6 +655,7 @@ sub writechildren2 {
     my $cecend;
     if ($ntype =~ /bpa/) {
         for (my $ii = $framestart; $ii <= $frameend; $ii++) {
+            $ii = int($ii);
             $myip = $vlan1 . '.' . $ii . '.0.1';
             $sidehash{$myip}->{side} = 'A-0';
             push @ipgroup, $myip;