Interfaces connected to single-termination circuits have broken path traces/connected_endpoint property

[ggidofalvy-tc]

Environment

• Python version: 3.7.3
• Nautobot version: 1.2.2
• nautobot-netbox-importer version: 1.4.0

Expected Behavior

After importing data from NetBox, all imported items, including single-termination circuits (e.g. transits, only one termination exists or is in use), to work and show up correctly

Observed Behavior

The path showed up as 'not reachable'. The 'connected_endpoint' of the interface and circuit termination was also null. The circuit trace functionality was also broken on the interface.

What did not help in resolving this:

• Delete extraneous circuit termination
• Update circuit termination in use
• Update circuit

What resolves the issue:

• Deleting unused side of the circuit termination
• AND
  -> Updating the cable connecting the circuit termination and interface
  -> Deleting and recreating the cable connecting the circuit termination and interface

Steps to Reproduce

1. Create a transit circuit in NetBox and connect it to an Interface of a Device
2. Export from NetBox
3. Import to Nautobot
4. Check Interface path trace/status and connected_endpoint of interface

[glennmatthews]

Thanks for the report! Can you confirm what version of NetBox the data was exported from?

[ggidofalvy-tc]

Hey, these were exported from 2.10.8.

An additional bit of info: the affected circuits that were exported from NetBox all had two circuit terminations, but only one of them was connected -- could this be the core of the issue?