diff --git a/scripts/fdbshow b/scripts/fdbshow
index 1c06d5a27d..666f68e80f 100755
--- a/scripts/fdbshow
+++ b/scripts/fdbshow
@@ -85,6 +85,10 @@ class FdbShow(object):
             elif 'bvid' in fdb:
                 try:
                     vlan_id = port_util.get_vlan_id_from_bvid(self.db, fdb["bvid"])
+                    if vlan_id is None:
+                        # the situation could be faced if the system has an FDB entries,
+                        # which are linked to default Vlan(caused by untagged trafic)
+                        continue
                 except:
                     vlan_id = fdb["bvid"]
                     print "Failed to get Vlan id for bvid {}\n".format(fdb["bvid"])