Cable trace will not work when rearports between devices are different number wise #1592

New Issue

MrUnknownDE · 2026-04-06T04:28:02+02:00

MrUnknownDE commented

2026-04-06 04:28:02 +02:00

Originally created by @cazure-n00b on 7/23/2025

Deployment Type

Self-hosted

NetBox Version

v4.2.6

Python Version

3.10

Steps to Reproduce

Create device#1 with 1 interface port.
Create device#2 with 8 front ports and 8 rear ports which are connected to each other.
Create device#3 with 24 front ports and 24 rear ports which are connected to each other.
Make sure that device#2 8 rear ports are connected to the rear ports 11-18 of device#3
Create device#4 with 24 interface ports
Now make the connection as follows;
device#1, interface port 1 >> device#2 front port 7
device#2, rear port 7 >> device#3 rear port 17
device#3, front port 17 >> device#4 interface port 17
Open device#1 and open Interface port 1, click on cable trace.
The cable trace will stop at the Rear port 17 of device#3
Open device#4 and select the cable trace of interface port 17
The cable trace will stop at the Rear port 17 of device#2

See image below where we start the cable trace from device#1

See image below where we start the cable trace from device#4

Expected Behavior

The below image is my expectation

Observed Behavior

If I would start the cable trace from IN_07, it will stop halfway (IN_01 > FP_07 x RP_07 > RP_17)
If I would start the cable trace from IN_17, it will stop halfway (RP_07 < RP_17 x FP_17 < IN_17)

But.. if I would change the connection to go through device#3 on Rear port and front port 07, then it will work. See image attached below;

*Originally created by @cazure-n00b on 7/23/2025* ### Deployment Type Self-hosted ### NetBox Version v4.2.6 ### Python Version 3.10 ### Steps to Reproduce 1. Create device#1 with 1 interface port. 2. Create device#2 with 8 front ports and 8 rear ports which are connected to each other. 3. Create device#3 with 24 front ports and 24 rear ports which are connected to each other. 4. Make sure that device#2 8 rear ports are connected to the rear ports 11-18 of device#3 5. Create device#4 with 24 interface ports 6. Now make the connection as follows; 7. device#1, interface port 1 >> device#2 front port 7 8. device#2, rear port 7 >> device#3 rear port 17 9. device#3, front port 17 >> device#4 interface port 17 10. Open device#1 and open Interface port 1, click on cable trace. 11. The cable trace will stop at the Rear port 17 of device#3 12. Open device#4 and select the cable trace of interface port 17 13. The cable trace will stop at the Rear port 17 of device#2 See image below where we start the cable trace from device#1 <img width="561" height="845" alt="Image" src="https://github.com/user-attachments/assets/7fa35610-b6e0-46ac-8a2e-146ac634532f" /> See image below where we start the cable trace from device#4 <img width="460" height="733" alt="Image" src="https://github.com/user-attachments/assets/f87df02d-a5bd-448b-bf02-d9483b4c4ab8" /> ### Expected Behavior The below image is my expectation <img width="467" height="1044" alt="Image" src="https://github.com/user-attachments/assets/b394c860-1747-448b-afa0-83476c46c538" /> ### Observed Behavior If I would start the cable trace from IN_07, it will stop halfway (IN_01 > FP_07 x RP_07 > **RP_17**) If I would start the cable trace from IN_17, it will stop halfway (**RP_07** < RP_17 x FP_17 < IN_17) But.. if I would change the connection to go through device#3 on Rear port and front port 07, then it will work. See image attached below; <img width="448" height="1047" alt="Image" src="https://github.com/user-attachments/assets/79da112d-834d-4b2d-8315-2e7dbc22a4c4" />

MrUnknownDE closed this issue

2026-04-06 04:28:02 +02:00

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Reference: github/netbox#1592