Add support to designate dot1q vlan for L3 termination interface #1240

New Issue

MrUnknownDE · 2026-04-05T22:29:27+02:00

MrUnknownDE commented

2026-04-05 22:29:27 +02:00

Originally created by @dmulyalin on 9/16/2025

NetBox version

v4.3.7

Feature type

Data model extension

Proposed functionality

Add support to designate vlan dot1q tag for L3 sub-interface

Use case

Sub-interfaces on devices are common and used for vlans (L2 domains) L3 termination, currently in Netbox there is no way to tell that interface terminates given vlan on L3 apart from encoding vlan id in interface name e.g. et-0/0/0.100

Using "802.1Q" mode "Vlan tagged" to associate with interface meant for L2 trunk interfaces and not for L3 interfaces. Suggest to add these "802.1Q Mode" modes:

L3 Termination Access
L3 Termination Tagged
L3 Termination Q-in-Q

to account for most common scenarios of terminating layer 3 for the vlans.

Database changes

Not sure

External dependencies

Not sure

*Originally created by @dmulyalin on 9/16/2025* ### NetBox version v4.3.7 ### Feature type Data model extension ### Proposed functionality Add support to designate vlan dot1q tag for L3 sub-interface ### Use case Sub-interfaces on devices are common and used for vlans (L2 domains) L3 termination, currently in Netbox there is no way to tell that interface terminates given vlan on L3 apart from encoding vlan id in interface name e.g. et-0/0/0.100 Using "802.1Q" mode "Vlan tagged" to associate with interface meant for L2 trunk interfaces and not for L3 interfaces. Suggest to add these "802.1Q Mode" modes: 1. L3 Termination Access 2. L3 Termination Tagged 3. L3 Termination Q-in-Q to account for most common scenarios of terminating layer 3 for the vlans. ### Database changes Not sure ### External dependencies Not sure

MrUnknownDE closed this issue

2026-04-05 22:29:27 +02:00

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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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Notifications

Due Date

No due date set.

Dependencies

No dependencies set.

Reference: github/netbox#1240