option43.net

What is it

Option43.net is an online DHCP Option 43 calculator designed specifically for network engineers. It aims to replace the veteran Shimi calculator, which only supports two vendors and has limited functionality, helping ops personnel quickly generate the Option 43 hexadecimal configuration values required for wireless APs to locate controllers.

Core Dimension Analysis

• Features & Use Cases: The core function is batch calculating and generating DHCP Option 43 values for multi-vendor Wi-Fi APs. Supported mainstream vendors include Cisco Aironet, Aruba, Ruckus (SmartZone/ZoneDirector/SmartCellGateway), Ubiquiti, Fortinet (new/old versions and CAPWAP), and Cambium cnMaestro. Additionally, it supports generating configuration syntax adapted for two types of DHCP server devices: Native Cisco IOS and Juniper SRX.
• Open Source & Self-Hosting: This tool is a closed-source project, currently only offering an online web version, and does not support self-hosted deployment.
• API/SDK & Integration Ecosystem: As a lightweight single-page web tool, it does not provide any API/SDK access, nor does it have a third-party integration ecosystem; it is a purely ready-to-use tool.
• Documentation Quality: The project has almost no documentation; the page only provides form-filling hints and explicitly states that it is a "Work in Progress (WIP)", reminding users to double-check the calculation results.

Pricing

Completely free to use; the developer provides a "Buy me a coffee" donation channel for support.

Pros & Cons

Pros: Covers far more vendors than similar veteran tools; supports batch IP input and specific network device syntax output; minimalist interface, ready to use out of the box; completely free.
Cons: The project is in WIP status, so there is a risk of errors in the results, requiring manual double-checking; lacks usage documentation and configuration examples; no API support for automated ops.

Who is it for

Suitable for network engineers, IT ops personnel, and system integrators who frequently configure wireless network environments of different brands, especially when facing multi-vendor mixed deployment scenarios, as it can significantly reduce the time spent manually converting hexadecimal values.

Access from China & Alternatives

Access from China: The site is a lightweight static page and can be accessed directly without any barriers. Donations require accessing external platforms which may be restricted, but this does not affect the use of core functions.
Alternatives: Shimi's Option 43 Calculator (veteran but supports few vendors), official configuration guides from various vendors, manual hexadecimal conversion.