Index: /tools/gformat.py
===================================================================
--- /tools/gformat.py	(revision 13646)
+++ /tools/gformat.py	(revision 13647)
@@ -1434,5 +1434,6 @@
     for iface_key in get_interface_keys(datadump):
       iface_name = iface_key.replace('_','-')
-      (ip, cidr) = datadump[iface_key]['ip'].split('/')
+      if 'ip' in datadump[iface_key]:
+        (ip, cidr) = datadump[iface_key]['ip'].split('/')
       try:
         (dhcp_start, dhcp_stop) = datadump[iface_key]['dhcp'].split('-')