netbox-circuit-prefix-link

A NetBox plugin that links Circuits to Prefixes.

• One Circuit can have many linked Prefixes.
• Each Prefix can be linked to at most one Circuit.
• The link is surfaced as a panel on Circuit, Prefix, and IPAddress detail pages.

Compatible with NetBox 4.5.x and NetBox 4.6.x. Requires Python 3.12+.

Install

pip install netbox-circuit-prefix-link

Then in your NetBox configuration.py:

PLUGINS = [
    'netbox_circuit_prefix_link',
]

Run migrations:

python manage.py migrate netbox_circuit_prefix_link

Configuration

You can control which columns appear in the Circuit and Prefix detail-page panels via PLUGINS_CONFIG in your NetBox configuration.py. Each panel takes a flat, ordered list of field names:

PLUGINS_CONFIG = {
    'netbox_circuit_prefix_link': {
        'circuit_panel': ['description', 'utilization'],   # columns in the "Linked Prefixes" table
        'prefix_panel':  ['provider', 'type'],             # rows in the "Circuit Link" panel
    },
}

Notes:

• Defaults (used when a key is omitted): circuit_panel → ['description', 'utilization']; prefix_panel → ['provider', 'type'].
• The identifying link is always shown first: the prefix on the Circuit panel, the Circuit on the Prefix panel — you do not list it.
• On the Circuit panel, the per-row edit/unlink actions are always shown last and are automatically hidden for users without change/delete permission.
• Unknown field names are ignored (and a warning is logged), so a typo won't break the page.
• Columns render in the order listed.

Available columns — Circuit panel (circuit_panel)

Each resolves from the linked Prefix:

Available columns — Prefix panel (prefix_panel)

Each resolves from the linked Circuit:

REST API

Endpoint: /api/plugins/circuit-prefix-link/circuit-prefixes/

Supports the standard NetBox CRUD plus filtering by circuit_id and prefix_id.

UI

• Circuit detail page — "Linked Prefixes" panel with an Add Prefix button.
• Prefix detail page — "Circuit Link" panel showing the associated Circuit (if any), with Link / Edit / Unlink buttons.
• IPAddress detail page — Read-only panel showing the Circuit of any parent Prefix that has a link.
• Circuits list view — opt-in "Linked Prefixes" column showing the linked prefixes as a comma-separated list of links. Enable it via the table configuration (gear icon) → add Linked Prefixes under Selected Columns.

Permissions

Standard Django/NetBox model permissions:

• netbox_circuit_prefix_link.view_circuitprefix
• netbox_circuit_prefix_link.add_circuitprefix
• netbox_circuit_prefix_link.change_circuitprefix
• netbox_circuit_prefix_link.delete_circuitprefix

Panel content is filtered with NetBox's object-permission restrict() — users only see Circuits and Prefixes they have view permission on.