fixes bugs in network filter for parsing ip address (#28404)

also adds parse_cli and parse_cli_textfsm to changelog

CHANGELOG.md

@@ -128,6 +128,10 @@ Ansible Changes By Release
 - profile_roles
 - stderr
 
+#### New Filters:
+- parse_cli
+- parse_cli_textfsm
+
 #### New Inventory Plugins:
 - advanced_host_list
 - constructed_groups

lib/ansible/module_utils/network_common.py

@@ -345,17 +345,22 @@ class Template:
         self.env = Environment()
         self.env.filters.update({'ternary': ternary})
 
-    def __call__(self, value, variables=None):
+    def __call__(self, value, variables=None, fail_on_undefined=True):
         variables = variables or {}
         if not self.contains_vars(value):
             return value
 
+        try:
             value = self.env.from_string(value).render(variables)
+        except UndefinedError:
+            if not fail_on_undefined:
+                return None
+            raise
 
         if value:
             try:
                 return ast.literal_eval(value)
-            except ValueError:
+            except:
                 return str(value)
         else:
             return None

lib/ansible/plugins/filter/network.py

@@ -131,7 +131,13 @@ def parse_cli(output, tmpl):
                         else:
                             items.append(None)
 
-                    objects.append(dict([(k, template(v, {'item': items})) for k, v in iteritems(value)]))
+                    obj = {}
+                    for k, v in iteritems(value):
+                        try:
+                            obj[k] = template(v, {'item': items}, fail_on_undefined=False)
+                        except:
+                            obj[k] = None
+                    objects.append(obj)
 
                 elif isinstance(value, Mapping):
                     items = list()