Site edit page fails to load with a very large number of ASNs assigned #71

New Issue

MrUnknownDE · 2026-04-05T16:21:28+02:00

MrUnknownDE commented

2026-04-05 16:21:28 +02:00

Originally created by @jeremystretch on 3/26/2026

NetBox Edition

NetBox Community

NetBox Version

v4.5.5

Python Version

3.12

Steps to Reproduce

Create a RIR
Create a site named "Site 1"
Create 10,000 ASNs and assign them to this site:

rir = ipam.RIR.objects.first()
site = dcim.Site.objects.get(name='Site 1')
asns = [
    ipam.ASN(asn=i, rir=rir) for i in range(1, 10001)
]
ipam.ASN.objects.bulk_create(asns, batch_size=250)
site.asns.set(
    ipam.ASN.objects.all()
)

Attempt to edit the site in the NetBox UI

Expected Behavior

The site edit form should render normally.

Observed Behavior

The response times out (or takes exceedingly long). I believe this is due to the overhead required to render the sites multiple-choice form field with so many values pre-populated.

*Originally created by @jeremystretch on 3/26/2026* ### NetBox Edition NetBox Community ### NetBox Version v4.5.5 ### Python Version 3.12 ### Steps to Reproduce 1. Create a RIR 2. Create a site named "Site 1" 3. Create 10,000 ASNs and assign them to this site: ```python rir = ipam.RIR.objects.first() site = dcim.Site.objects.get(name='Site 1') asns = [ ipam.ASN(asn=i, rir=rir) for i in range(1, 10001) ] ipam.ASN.objects.bulk_create(asns, batch_size=250) site.asns.set( ipam.ASN.objects.all() ) ``` 4. Attempt to edit the site in the NetBox UI ### Expected Behavior The site edit form should render normally. ### Observed Behavior The response times out (or takes exceedingly long). I believe this is due to the overhead required to render the `sites` multiple-choice form field with so many values pre-populated.

MrUnknownDE closed this issue

2026-04-05 16:21:28 +02:00

MrUnknownDE added the severity: medium severity: medium status: accepted severity: medium severity: medium netbox status: accepted status: accepted type: bug status: accepted status: accepted status: accepted status: accepted status: accepted status: accepted status: accepted status: accepted status: accepted netbox netbox netbox netbox netbox netbox netbox netbox netbox netbox netbox netbox netbox netbox netbox netbox netbox netbox netbox netbox netbox netbox netbox netbox netbox netbox netbox netbox netbox netbox netbox type: bug type: bug type: bug type: bug type: bug type: bug type: bug type: bug type: bug type: bug type: bug type: bug type: bug type: bug type: bug type: bug labels 2026-04-05 16:21:29 +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

No Label netbox netbox netbox netbox netbox netbox netbox netbox netbox netbox netbox netbox netbox netbox netbox netbox netbox netbox netbox netbox netbox netbox netbox netbox netbox netbox netbox netbox netbox netbox netbox netbox severity: medium severity: medium severity: medium severity: medium status: accepted status: accepted status: accepted status: accepted status: accepted status: accepted status: accepted status: accepted status: accepted status: accepted status: accepted status: accepted type: bug type: bug type: bug type: bug type: bug type: bug type: bug type: bug type: bug type: bug type: bug type: bug type: bug type: bug type: bug type: bug type: bug

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Reference: github/netbox#71