The new docs.trellix.com features a modernized UI and AI-powered conversational search. Content is currently available in English, with additional languages launching in early November 2026. We hope you enjoy the updated experience.

Common problems and solutions

Prev Next

This section lists some common installation problems and their solutions.

Problem

Possible Cause

Solution

Network or link problems

Improper cabling or port configuration

Ensure that the transmit and receive cables are properly connected to the fail-open switch.

The sensor LED is off.

The Sensor is turned off.

The Sensor port cable is disconnected.

Restore Sensor power.

Check the Sensor cable connections.

The sensor is operational but is not monitoring traffic.

Network device cables have been disconnected.

The Sensor ports have not been enabled in the Sensor.

Check the cables and ensure that they are properly connected to both the network devices and the fail-open switch.

Ports are disabled on a Sensor failure; they must be re-enabled in the Manager for the Sensor monitoring to resume.

Runts or giants errors on switches and routers

Improper cabling or port configuration

Ensure that the transmit and receive cables are properly connected to the fail-open switch.

The system fault “Switch absent” appears on the Operational Status page of the Manager.

Improper cabling

Ensure that the transmit and receive cables are properly connected to the fail-open switch.