Cisco Priority "vlan 0" causing jobs to fail

[cmong-nextech]

Preface

I have discussed this relatively in depth with Scetron, JKala, and Shooks already.

Expected Behavior

Job runs and creates the expected interfaces, port-channels, and vlans.

Observed Behavior

The job fails with the following error:

Failed to assign untagged vlan to switch-corestack:Port-channel12, unable to locate a vlan with attributes [name: VLAN0000, vid: 0 location: switch location]
[2024-07-23 13:46:44,539: ERROR/ForkPoolWorker-1]
No object resulted from sync, will not process child objects.
Task nautobot.extras.jobs.run_job[c5f3e3b6-97a1-427f-b995-90822a1742da] raised unexpected: UnboundLocalError("cannot access local variable 'interface' where it is not associated with a value")
Traceback (most recent call last):
 File "/opt/nautobot/lib/python3.11/site-packages/celery/app/trace.py", line 477, in trace_task
   R = retval = fun(*args, **kwargs)
                ^^^^^^^^^^^^^^^^^^^^
 File "/opt/nautobot/lib/python3.11/site-packages/celery/app/trace.py", line 760, in __protected_call__
   return self.run(*args, **kwargs)
          ^^^^^^^^^^^^^^^^^^^^^^^^^
 File "/opt/nautobot/lib/python3.11/site-packages/nautobot/extras/jobs.py", line 1136, in run_job
   result = job(*args, **kwargs)
            ^^^^^^^^^^^^^^^^^^^^
 File "/opt/nautobot/lib/python3.11/site-packages/nautobot/extras/jobs.py", line 149, in __call__
   return self.run(*args, **deserialized_kwargs)
          ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
 File "/opt/nautobot/lib/python3.11/site-packages/nautobot_device_onboarding/jobs.py", line 691, in run
   super().run(dryrun, memory_profiling, *args, **kwargs)
 File "/opt/nautobot/lib/python3.11/site-packages/nautobot_ssot/jobs/base.py", line 317, in run
   self.sync_data(memory_profiling)
 File "/opt/nautobot/lib/python3.11/site-packages/nautobot_ssot/jobs/base.py", line 166, in sync_data
   self.execute_sync()
 File "/opt/nautobot/lib/python3.11/site-packages/nautobot_ssot/jobs/base.py", line 98, in execute_sync
   self.source_adapter.sync_to(self.target_adapter, flags=self.diffsync_flags)
 File "/opt/nautobot/lib/python3.11/site-packages/diffsync/__init__.py", line 601, in sync_to
   return target.sync_from(self, diff_class=diff_class, flags=flags, callback=callback, diff=diff)
          ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
 File "/opt/nautobot/lib/python3.11/site-packages/diffsync/__init__.py", line 573, in sync_from
   result = syncer.perform_sync()
            ^^^^^^^^^^^^^^^^^^^^^
 File "/opt/nautobot/lib/python3.11/site-packages/diffsync/helpers.py", line 329, in perform_sync
   changed |= self.sync_diff_element(element)
              ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
 File "/opt/nautobot/lib/python3.11/site-packages/diffsync/helpers.py", line 379, in sync_diff_element
   changed, modified_model = self.sync_model(src_model=src_model, dst_model=dst_model, ids=ids, attrs=attrs)
                             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
 File "/opt/nautobot/lib/python3.11/site-packages/diffsync/helpers.py", line 432, in sync_model
   dst_model = dst_model.update(attrs=attrs)
               ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
 File "/opt/nautobot/lib/python3.11/site-packages/nautobot_device_onboarding/diffsync/models/sync_network_data_models.py", line 447, in update
   name=attrs["lag__interface__name"], device=interface.device, type=InterfaceTypeChoices.TYPE_LAG
                                              ^^^^^^^^^
UnboundLocalError: cannot access local variable 'interface' where it is not associated with a value

How Can This Be Reproduced

Run the latest ssot style device discovery on a cisco device that uses a port-channel with the show switchport interfaces outputting Trunking Native Mode VLAN: 0 (Inactive)