IPAM - Available prefixes might list an existing prefix #4107

New Issue

adam · 2025-12-29T18:33:09+01:00

adam commented

2025-12-29 18:33:09 +01:00

Originally created by @mzbroch on GitHub (Sep 16, 2020).

Environment

Python version: 3.7.9
NetBox version: 2.9.2

Steps to Reproduce

Create a container Prefix object, and an active Prefix object with the same prefix value as container's.

>>> Prefix.objects.create(prefix='192.0.2.0/24', status='container')
<Prefix: 192.0.2.0/24>

>>> Prefix.objects.get(prefix='192.0.2.0/24').get_available_prefixes()
IPSet(['192.0.2.0/24'])

>>> Prefix.objects.create(prefix='192.0.2.0/24', status='active')
<Prefix: 192.0.2.0/24>

>>> Prefix.objects.get(prefix='192.0.2.0/24', status='container').get_available_prefixes()
IPSet(['192.0.2.0/24'])

Expected Behavior

NetBox should not list container's child prefix in get_available_prefixes for cases when a child is equal to the container (filter to be used contained or equal, instead of contained only)

Observed Behavior

NetBox lists existing child prefix (which is equal to the container prefix) as a result of method get_available_prefixes

Originally created by @mzbroch on GitHub (Sep 16, 2020). ### Environment * Python version: 3.7.9 * NetBox version: 2.9.2 ### Steps to Reproduce 1. Create a container Prefix object, and an active Prefix object with the same prefix value as container's. ``` >>> Prefix.objects.create(prefix='192.0.2.0/24', status='container') <Prefix: 192.0.2.0/24> >>> Prefix.objects.get(prefix='192.0.2.0/24').get_available_prefixes() IPSet(['192.0.2.0/24']) >>> Prefix.objects.create(prefix='192.0.2.0/24', status='active') <Prefix: 192.0.2.0/24> >>> Prefix.objects.get(prefix='192.0.2.0/24', status='container').get_available_prefixes() IPSet(['192.0.2.0/24']) ``` ### Expected Behavior NetBox should not list container's child prefix in `get_available_prefixes` for cases when a child is equal to the container (filter to be used contained or equal, instead of contained only) ### Observed Behavior NetBox lists existing child prefix (which is equal to the container prefix) as a result of method `get_available_prefixes`

adam closed this issue

2025-12-29 18:33:09 +01:00

adam commented

2025-12-29 18:33:09 +01:00

@jeremystretch commented on GitHub (Sep 23, 2020):

This is expected behavior: the second prefix is not a child of the first. You've created two parallel prefixes with different statuses (which is a valid condition). NetBox will report the set of IPs available within each independently.

@jeremystretch commented on GitHub (Sep 23, 2020): This is expected behavior: the second prefix is not a child of the first. You've created two parallel prefixes with different statuses (which _is_ a valid condition). NetBox will report the set of IPs available within each independently.

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Reference: starred/netbox#4107