Field Notice: *Expired* FN - 15670 - New DC Power Supply Requires Minimum Version of Cisco IOS Software

Revised December 11, 2007

November 15, 2001

NOTICE:

THIS FIELD NOTICE HAS BEEN EXPIRED AND IS NO LONGER MAINTAINED OR UPDATED BY CISCO.

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

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Products Affected

Product	Top Assembly	Comments
	Part Number
PWR-7200-DC+=	34-1729-xx	CISCO 7200 DC (24V-60V) POWER SUPPLY OPTION

Problem Description

The new power supply for the Cisco 7200 (PWR-7200-DC+) is not recognized in versions of Cisco IOS® software released before the power supply.

Background

In order to recognize the type of power supply in a Cisco 7200 router, Cisco IOS software looks for an identification voltage from the power supply. It then compares that voltage with products it knows to exist. If the voltage is not recognized, Cisco IOS software will indicate that the power supply slot is empty.

Since the PWR-7200-DC+ was not known to Cisco IOS software versions prior to the product's release, it will report that the power supply slot is empty when a PWR-7200-DC+ is installed.

Problem Symptoms

The power supply slot will show empty when a show environment all command is issued.

Sample Output

Left#show environment all
Power Supplies:
   
  Power supply 1 is empty. ===> unrecognized
     Power supply 2 is empty. ===> unrecognized


Temperature readings:
     chassis inlet    measured at 28C/82F 
     chassis outlet 1 measured at 31C/87F 
     
chassis outlet 2 measured at 32C/89F 
     chassis outlet 3 measured at 32C/89F 

Voltage readings:

     +3.45 V  measured at +3.49 V 
     +5.15 V  measured at +5.25 V 
     +12.15 V measured at +12.29 V

     -11.95 V measured at -11.81 V

Envm stats saved 1 time(s) since reload

Workaround/Solution

In order to recognize the power supply, a minimum version of IOS is required. The minimum IOS versions are:

12.0(17)S

12.1(10)

12.1(8a)E

12.2(2)T

12.2(3)

12.2(2)DD

12.2(4)B

To follow the link below, you must be a registered user and you must be logged in.

To look up minimum software versions for hardware products, please go to the Hardware-Software Compatibility Matrix

DDTS

To follow the bug ID link below and see detailed bug information, you must be a registered user and you must be logged in.

DDTS	Description
CSCdt70808	Add new power supply ID

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:

• Open a service request on Cisco.com
• By email
• By telephone

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