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Cisco IPS 4200 Series Sensors

Field Notice: FN - 28115 - Intrusion Detection System 4235 and 4250 Sensor Inductor Failure


Revised September 21, 2005

April 5, 2004

NOTICE:

THIS FIELD NOTICE IS PROVIDED ON AN "AS IS" BASIS AND DOES NOT IMPLY ANY KIND OF GUARANTEE OR WARRANTY, INCLUDING THE WARRANTY OF MERCHANTABILITY. YOUR USE OF THE INFORMATION ON THE FIELD NOTICE OR MATERIALS LINKED FROM THE FIELD NOTICE IS AT YOUR OWN RISK. CISCO RESERVES THE RIGHT TO CHANGE OR UPDATE THIS FIELD NOTICE AT ANY TIME.


Products Affected

Product

Comments

IDS-4235-K9

4235 Sensor(chassis, s/w, SSH, 10/100/1000BaseT w/RJ-45)

IDS-4250-TX-K9

4250 Sensor (chassis, s/w, SSH, 10/100/1000BaseT w/RJ-45)

IDS-4250-SX-K9

4250 Sensor (chassis, s/w, SSH, 1000BaseSX w/SC connector)

IDS-4250-XL-K9

IDS 4250 (chassis, s/w, IDS Accelerated 1000BaseSX w/ MT-RJ)

 

Serial Numbers

See the Serial Number spreadsheet.

Problem Description

An inductor on the motherboard of affected* 4235 and 4250 models of the Cisco Intrusion Detection System (IDS) fails, rendering the unit non functional. The affected units contain a defective inductor that may exhibit an electrical short on the motherboard after several months of use or longer. In some cases, the failure of the inductor is preceded by an audible "pop" and the visible release of smoke, prior to the system automatically shutting off. The failures that have been reported to Cisco are confined to the motherboard within the server enclosure. In some rare situations, smoke may be exhausted from the chassis when the inductor is burned. The final outcome of these events complies with the requirements in the Safety Standards UL60950/CSA C22.2 No. 60950/IEC60950/EN60950.

* Refer to the How To Identify Hardware Levels section for details on determining whether your IDS 4235 or 4250 is affected by this Field Notice.

Background

A Voltage Regulator Module (VRM) supplies five volts to the motherboard. Due to a faulty inductor assembly, components connected to the motherboard's five volt supply rail may experience a voltage surge up to 10 volts and may fail due to electrical over stress (EOS). During the EOS event, failing components may emit a small to moderate amount of visible smoke.

In all cases, the failure is contained to the chassis enclosure.

Problem Symptoms

When the failure occurs, the system automatically shuts off and becomes unresponsive. In some cases the problem is preceded by an audible "pop" and the visible release of smoke, prior to the system automatically shutting off.

Workaround/Solution

The only units that are affected by this problem are those with the Service Tag numbers (Serial Numbers) attached to this Field Notice under the Serial Numbers section. The unit's Service Tag number can be found on the back and the top of the chassis. If your IDS 4235 or IDS 4250's Service Tag number is on the list provided in this Field Notice, please open a service request with Cisco TAC to generate a return materials authorization (RMA) request.

How To Identify Hardware Levels

A sticker on the back and the top of the chassis has "service tag# xxxxxxx". Customers who have IDS 4235 or IDS 4250 should compare this Service Tag # with the List of Service Tag #s provided in this Field Notice to determine if your unit is affected by this problem.

If you receive a Cisco IDS 4235/4250 chassis via the return materials authorization (RMA) process and a green sticker has been applied to the back of the chassis, then the chassis was identified as an affected system and was already proactively repaired by Cisco. In these cases, no further action is needed by the customer.

Questions About This Field Notice

Send an email to ids-sensor-inquiry@cisco.com

For More Information

If you require further assistance, or if you have any further questions regarding this field notice, please contact the Cisco Systems Technical Assistance Center (TAC) by one of the following methods:

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