diff --git a/ifupdownaddons/modulebase.py b/ifupdownaddons/modulebase.py
index 50a1e7c..f8cf7c0 100644
--- a/ifupdownaddons/modulebase.py
+++ b/ifupdownaddons/modulebase.py
@@ -4,6 +4,7 @@
 # Author: Roopa Prabhu, roopa@cumulusnetworks.com
 #
 
+import os
 import re
 import io
 import logging
@@ -324,11 +325,14 @@ class moduleBase(object):
     def _get_reserved_vlan_range(self):
         start = end = 0
         get_resvvlan = '/usr/share/python-ifupdown2/get_reserved_vlan_range.sh'
+        if not os.path.exists(get_resvvlan):
+            return (start, end)
         try:
             (s, e) = self.exec_command(get_resvvlan).strip('\n').split('-')
             start = int(s)
             end = int(e)
-        except:
+        except Exception, e:
+            self.logger.debug('%s failed (%s)' %(get_resvvlan, str(e)))
             # ignore errors
             pass
         return (start, end)