Index: tools/gformat.py
===================================================================
--- tools/gformat.py	(revision 13434)
+++ tools/gformat.py	(revision 13435)
@@ -513,5 +513,5 @@
   dhcp_out = defaultdict(list)
   for iface_key in get_interface_keys(datadump):
-    ifname = datadump[iface_key]['autogen_ifname']
+    ifname = datadump[iface_key]['autogen_ifbase']
     if not datadump[iface_key].has_key('comment'):
       datadump[iface_key]['comment'] = None