IPAM nesting bug - showing false positive #1481

New Issue

MrUnknownDE · 2026-04-06T02:15:55+02:00

MrUnknownDE commented

2026-04-06 02:15:55 +02:00

Originally created by @Jeffrey-FB on 8/11/2025

Deployment Type

Self-hosted

NetBox Version

v4.3.0

Python Version

3.11

Steps to Reproduce

create a IPAM prefix container for 10.100.0.0/15
Then a container 10.100.0.0/16
Then a container 10.100.241.0/24
Then create a vrf for 10.100.241.0/29
and 10.100.241.8/29

Expected Behavior

10.100.241.0/29 and 10.100.241.8/29 show show as stepped on the prefix page as a child of 10.100.241.0/24
e.g.
--10.100.241.0/24
---10.100.241.0/29
---10.100.241.8/29

The /29 should show as child prefixes in the /24 'Child Prefix' tab

Observed Behavior

the /29 do not step on the IPAM -> Prefix menu
But they do show in the 'Child Prefixes' in the tab of 10.100.241.0/24
the 10.100.241.0/24 container Utilization also shows 0.0% even though it say it has Child Prefixes
As per images attached.

I have tried changing the container /24 to active all this seems to do is remove all the child /29 from it.
And the same applies if i try change the status of the /29's they just remove themselves as a child prefix from the /24

Is there a way to fix this, can I gather some extra info to help resolve this for us?
Thanks

*Originally created by @Jeffrey-FB on 8/11/2025* ### Deployment Type Self-hosted ### NetBox Version v4.3.0 ### Python Version 3.11 ### Steps to Reproduce create a IPAM prefix container for 10.100.0.0/15 Then a container 10.100.0.0/16 Then a container 10.100.241.0/24 Then create a vrf for 10.100.241.0/29 and 10.100.241.8/29 ### Expected Behavior 10.100.241.0/29 and 10.100.241.8/29 show show as stepped on the prefix page as a child of 10.100.241.0/24 e.g. --10.100.241.0/24 ---10.100.241.0/29 ---10.100.241.8/29 The /29 should show as child prefixes in the /24 'Child Prefix' tab ### Observed Behavior the /29 do not step on the IPAM -> Prefix menu But they do show in the 'Child Prefixes' in the tab of 10.100.241.0/24 the 10.100.241.0/24 container Utilization also shows 0.0% even though it say it has Child Prefixes As per images attached. I have tried changing the container /24 to active all this seems to do is remove all the child /29 from it. And the same applies if i try change the status of the /29's they just remove themselves as a child prefix from the /24 Is there a way to fix this, can I gather some extra info to help resolve this for us? Thanks <img width="736" height="631" alt="Image" src="https://github.com/user-attachments/assets/8c637d54-bf56-4418-9991-fe8d0b5fe6a0" /> <img width="1107" height="637" alt="Image" src="https://github.com/user-attachments/assets/36c1063f-3877-47cf-83e3-95db3e3543cd" />

MrUnknownDE closed this issue

2026-04-06 02:15:55 +02:00

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Branches Tags

main

21455-sql-indexes-audit

21357-register-model-actions

feature

20924-plugin-ui-components

21766-improve-test-coverage-for-sortable-table-columns

21157-export-template-public-models

21025-pre-render-config-contexts

21364-swagger

feature-ip-prefix-link

20911-dropdown-3

fix_module_substitution

21160-filterset

20911-dropdown-2

20044-elevation-stuck-lightmode

7604-filter-modifiers-v3

20660-script-load

19724-graphql

14884-script

19720-macaddress-interface-generic-relation

fix-19669-api-image-download

7604-filter-modifiers

19275-fixes-interface-bulk-edit

fix-17794-get_field_value_return_list

11507-show-aggregate-and-rir-on-api

9583-add_column_specific_search_field_to_tables

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Reference: github/netbox#1481