Cisco IOS Software Releases 12.2 Special and Early Deployments

EoS/EoL Announcement For Cisco IOS Software Release 12.3B

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Cisco Systems ® announces the end-of-sale and end-of-life dates for the Cisco IOS ® Software Release 12.3B. The last day to order the Cisco IOS Software Release 12.3B is December 30, 2004. Customers with active service contracts will continue to receive support from the Cisco Technical Assistance Center (TAC) until December 30, 2009. Table 1 describes the end-of-life milestones, definitions, and dates for the Cisco IOS Software Release 12.3B.
Customers are encouraged to migrate to the Cisco IOS Software Release 12.3(7) T, which will offer feature parity of the B train, as well new features. Information about this product can be found at: Table 2 provides relevant information for migrating from the Cisco IOS Software Release 12.3B to the 12.3(7) T.

Table 1. End-of-Life Milestones and Dates for the Cisco IOS Software Release 12.3B




End-of-life announcement date

The date the document that announces the end of sale and end of life of a product is distributed to the general public.

June 30, 2004

End-of-sale date

The last date to order the product through Cisco point-of-sale mechanisms. The product is no longer for sale after this date.

December 30, 2004

Last shipment date

The last-possible ship date that can be requested of Cisco and/or its contract manufacturers. Actual ship date is dependent on lead time.

March 30, 2005

End of software maintenance releases date

The last date that Cisco Engineering may release any final software maintenance releases or bug fixes. After this date, Cisco Engineering will no longer develop, repair, maintain, or test the product software.

December 30, 2005

End of routine failure analysis date

The last-possible date a routine failure analysis may be performed to determine the cause of product failure or defect.

December 30, 2005

End of new service attachment date

For equipment and software that is not covered by a service-and-support contract, this is the last date to order a new service-and-support contract or add the equipment and/or software to an existing service-and-support contract.

December 30, 2005

End of service contract renewal date

The last date to extend or renew a service contract for the product. The extension or renewal period cannot extend beyond the last date of support.

December 30, 2008

Last date of support

The last date to receive service and support for the product. After this date, all support services for the product are unavailable, and the product becomes obsolete.

December 30, 2009

Table 2. Product Part Numbers Affected by This Announcement

End-of-Sale Product Part Number

Product Description

12.3(1a)B, 12.3(3)B, 12.3(3)B1, 12.3(5a)B, 12.3(5a)B1

The listed Cisco IOS Software release numbers are a comprehensive representation of maintenance releases derived from the 12.3B train. All images created from 12.3B releases, including subsequent posts, are included in this announcement.


The recommended replacement for the Cisco IOS Software Release 12.3B is Release 12.3(7) T. Cisco IOS Software Release 12.3(7) T delivers the functionality from 12.3B in addition to new features. For detailed information regarding the platforms and features that will be delivered in Release 12.3T, please visit: Cisco Feature Navigator:
Additional Information
For more information about Cisco products, please contact your Cisco account manager and/or Cisco Channel Partner.
For more information about the Cisco End-of-Life Policy, go to:
To subscribe to receive end-of-life/end-of-sale information please go to: