diff --git a/xCAT-server/lib/xcat/plugins/dhcp.pm b/xCAT-server/lib/xcat/plugins/dhcp.pm
index 48cee2743..f0b952e05 100644
--- a/xCAT-server/lib/xcat/plugins/dhcp.pm
+++ b/xCAT-server/lib/xcat/plugins/dhcp.pm
@@ -432,7 +432,7 @@ sub process_request
     {    #Use netstat to determine activenics only when no site ent.
         foreach (@nrn)
         {
-            my @ent = split /\s+/;
+            my @ent = split /:/;
             my $firstoctet = $ent[0];
             $firstoctet =~ s/^(\d+)\..*/$1/;
             if ($ent[0] eq "169.254.0.0" or ($firstoctet >= 224 and $firstoctet <= 239) or $ent[0] eq "127.0.0.0")