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Troubleshooting the Sensor

This section provides the solution to some of the common installation problems.

Problem Possible Cause Solution

LED is off. The control cable has been

disconnected.

Check the control cable and ensure it is

properly connected to both the Sensor and

the Bypass Switch.

LED is off. The Sensor is powered off. Restore Sensor power.

LED is off. The Sensor port cable is

disconnected.

Check the Sensor cable connections.

Sensor is operational, but

is not monitoring traffic.

Network device cables have

been disconnected.

Check the cables and ensure they are

properly connected to both the network

devices and the Bypass Switch.

Sensor is operational, but

is not monitoring traffic.

The Sensor ports have not

been enabled in the

Manager.

The Sensor will not monitor traffic on the

ports unless the ports are enabled in the

Manager. Ports are disabled in a Sensor

failure; they must be re-enabled for Sensor

monitoring to resume.

Network or link

problems.

Improper cabling or port

configuration.

Ensure that the transmit and receive cables

are properly connected to the Bypass

Switch.

Runts or giants errors on

switch and routers.

Improper cabling or port

configuration.

Ensure that the transmit and receive cables

are properly connected to the Bypass

Switch.

The system fault "Switch

absent" appears in the

Manager Operational

Status window.

The control cable has been

disconnected.

Check the control cable and ensure it is

properly connected to both the Sensor and

the Bypass Switch.

McAfee

Network Security Platform M-2750 Sensor Product Guide

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