diff --git a/neutron/common/ipv6_utils.py b/neutron/common/ipv6_utils.py
index 6e57bfcfe6..fbe61e49bb 100644
--- a/neutron/common/ipv6_utils.py
+++ b/neutron/common/ipv6_utils.py
@@ -30,7 +30,7 @@ def get_ipv6_addr_by_EUI64(prefix, mac):
         eui64 = int(netaddr.EUI(mac).eui64())
         prefix = netaddr.IPNetwork(prefix)
         return netaddr.IPAddress(prefix.first + eui64 ^ (1 << 57))
-    except netaddr.AddrFormatError:
+    except (ValueError, netaddr.AddrFormatError):
         raise TypeError(_('Bad prefix or mac format for generating IPv6 '
                           'address by EUI-64: %(prefix)s, %(mac)s:')
                         % {'prefix': prefix, 'mac': mac})
diff --git a/neutron/plugins/cisco/n1kv/n1kv_client.py b/neutron/plugins/cisco/n1kv/n1kv_client.py
index 662199df3b..6164d96388 100644
--- a/neutron/plugins/cisco/n1kv/n1kv_client.py
+++ b/neutron/plugins/cisco/n1kv/n1kv_client.py
@@ -321,7 +321,7 @@ class Client(object):
                 ip = netaddr.IPNetwork(subnet['cidr'])
                 netmask = str(ip.netmask)
                 network_address = str(ip.network)
-            except netaddr.AddrFormatError:
+            except (ValueError, netaddr.AddrFormatError):
                 msg = _("Invalid input for CIDR")
                 raise n_exc.InvalidInput(error_message=msg)
         else: