diff --git a/neutron_lib/api/converters.py b/neutron_lib/api/converters.py
index e6fe33dce..c0d9daf91 100644
--- a/neutron_lib/api/converters.py
+++ b/neutron_lib/api/converters.py
@@ -218,7 +218,12 @@ def convert_ip_to_canonical_format(value):
         ip = netaddr.IPAddress(value)
         if ip.version == constants.IP_VERSION_6:
             return str(ip.format(dialect=netaddr.ipv6_compact))
-    except (netaddr.core.AddrFormatError, ValueError):
+    except Exception:  # nosec B110
+        # netaddr may raise all kinds of exceptions (ValueError,
+        # AttributeError...) if the input is not a valid IP address. Instead of
+        # catching them one by one, just catch all exceptions at once.
+        # Obviously, it would be better if netaddr raised a particular
+        # exception specific to the library. But we don't control it.
         pass
     return value
 
diff --git a/neutron_lib/tests/unit/api/test_converters.py b/neutron_lib/tests/unit/api/test_converters.py
index c7c25907b..c4da496de 100644
--- a/neutron_lib/tests/unit/api/test_converters.py
+++ b/neutron_lib/tests/unit/api/test_converters.py
@@ -209,6 +209,11 @@ class TestConvertIPv6AddrCanonicalFormat(base.BaseTestCase):
             '2001:db8:0:1:1:1:1:1/128')
         self.assertEqual('2001:db8:0:1:1:1:1:1/128', result)
 
+    def test_convert_subnetpools(self):
+        pools = [{'start': '1.1.1.1', 'end': '1.1.1.100'}]
+        result = converters.convert_ip_to_canonical_format(pools)
+        self.assertEqual(pools, result)
+
 
 class TestConvertAllocationPoolsCanonicalFormat(base.BaseTestCase):