diff --git a/perl-xCAT/xCAT/NetworkUtils.pm b/perl-xCAT/xCAT/NetworkUtils.pm
index c17c785e6..b0d90ae3f 100755
--- a/perl-xCAT/xCAT/NetworkUtils.pm
+++ b/perl-xCAT/xCAT/NetworkUtils.pm
@@ -422,11 +422,6 @@ sub ishostinsubnet {
     if ($ip =~ /:/) {#ipv6
         $numbits=128;
     }
-    # IPv6 subnet with netmask postfix like /64
-    if ($subnet && ($subnet =~ /\//))
-    {
-        $subnet =~ s/\/.*$//;
-    }
     if ($mask) {
 	if ($mask =~ /\//) {
 	    $mask =~ s/^\///;
@@ -442,6 +437,10 @@ sub ishostinsubnet {
             die "ishostinsubnet must either be called with a netmask or CIDR /bits notation";
         }
     }
+    if ($subnet && ($subnet =~ /\//)) #remove CIDR suffix from subnet
+    {
+        $subnet =~ s/\/.*$//;
+    }
     $ip = getipaddr($ip,GetNumber=>1);
     $subnet = getipaddr($subnet,GetNumber=>1);
     $ip &= $mask;