Unable to trace Cables when single Interfaces are connected across multiple Circuits

[craized]

NetBox Edition

NetBox Community

NetBox Version

v4.4.1

Python Version

3.10

Steps to Reproduce

I created this setup in the NetBox demo instance in case anyone has a chance to look before it gets blown out. I'm just linking the originating interfaces since everything else is very easy to find from a cable trace

https://demo.netbox.dev/dcim/interfaces/2493/
https://demo.netbox.dev/dcim/interfaces/2438/

1. Create two Sites, SITEA and SITEB
2. Create two Devices, device1.sitea and device1.siteb (Example QFX5100-48T
3. Create two Circuits, SPAN1-SITEA-TX and SPAN1-SITEA-RX
4. Create Circuit Termination at SITEA and SITEB on each Circuit
5. Connect device1.sitea interface et-0/0/48 to Circuit Termination "A" for both Circuit SPAN1-SITEA-TX and SPAN1-SITEA-RX by
   • Selecting two Circuits, SPAN1-SITEA-TX and SPAN1-SITEA-RX
   • Selecting two Sides, SPAN1-SITEA-TX: Termination A and SPAN1-SITEA-RX: Termination A
6. Connect device1.siteb interface et-0/0/48 to Circuit Termination "Z" for both Circuit SPAN1-SITEA-TX and SPAN1-SITEA-RX by
   • Selecting two Circuits, SPAN1-SITEA-TX and SPAN1-SITEA-RX
   • Selecting two Sides, SPAN1-SITEA-TX: Termination B and SPAN1-SITEA-RX: Termination B
7. Attempt to trace interface

Expected Behavior

A cable trace that goes from one interface, splits to both Circuit Termination Zs, then collapses from both Circuit Termination As to the far end interface

Observed Behavior

Path split! is detected between the Circuit and Termination Zs

Initial trace:

Remaining trace after a split node is selected

[arthanson]

@DanSheps was not getting a reproduction on this, but the cabling wasn't being split so not sure if steps 4 and 5 are clear. Can you check if this is a valid scenario for the cabling tracing. Can be put into the backlog if so, a lower priority to fix.

[craized]

I edited the description to hopefully make it more clear. If it's still unclear I'll re-model in the demo environment and add screenshots of the cable creation. Thank you for starting investigation.