---
title: "Why does my cellular interface won't start even if I have my LAN(ext) port in DHCP mode?"
slug: "why-does-my-cellular-interface-not-start-even-if-i-have-my-lan-ext-port-in-dhcp"
updated: 2026-05-27T13:35:18Z
published: 2026-05-27T13:35:18Z
canonical: "docs.insys-icom.com/why-does-my-cellular-interface-not-start-even-if-i-have-my-lan-ext-port-in-dhcp"
---

> ## Documentation Index
> Fetch the complete documentation index at: https://docs.insys-icom.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Why does my cellular interface won't start even if I have my LAN(ext) port in DHCP mode?

With the **INSYS OS**, the cellular interface **cannot** be used while the LAN(ext) port is in **"DHCP"** or **"static"** mode. Please either turn the port **off**, or set it to **"bridging"** mode.