diff --git a/bin/nova-manage b/bin/nova-manage
index a4d82020..0c39b662 100755
--- a/bin/nova-manage
+++ b/bin/nova-manage
@@ -518,11 +518,12 @@ class NetworkCommands(object):
                network_size=None, vlan_start=None,
                vpn_start=None, fixed_range_v6=None, label='public'):
         """Creates fixed ips for host by range
-        arguments: [fixed_range=FLAG], [num_networks=FLAG],
+        arguments: fixed_range=FLAG, [num_networks=FLAG],
                    [network_size=FLAG], [vlan_start=FLAG],
                    [vpn_start=FLAG], [fixed_range_v6=FLAG]"""
         if not fixed_range:
-            fixed_range = FLAGS.fixed_range
+            raise ValueError('Fixed range in the form of 10.0.0.0/8 is '
+                             'required to create networks.')
         if not num_networks:
             num_networks = FLAGS.num_networks
         if not network_size: