PRODUCT BULLETIN, NO. 2617
PRODUCT OVERVIEW
Cisco IOS® Software release train 12.3BC provides support for the ubr7100, ubr7200 and ubr10k (PRE1 and PRE2) platforms. New features, bug fixes, and software support for these platforms can be found through regular releases of the Cisco IOS Software 12.3BC train.
TRAIN PARENT AND MIGRATION GUIDE
Figure 1 below displays how Cisco IOS Software Release 12.3BC functions relative to the Cisco IOS Software Release 12.3 train. The Cisco IOS Software Release 12.3BC train is the migration path for the Cisco IOS Software Release 12.2BC train. This means that all features and bug fixes from the Cisco IOS Software Release 12.2BC train will be available in the Cisco IOS Software Release 12.3BC train. Also, all support from the Cisco IOS Software Release 12.2BC train is now provided in the Cisco IOS Software Release 12.3BC train.
The Cisco IOS Software Release 12.3BC train is based upon the Cisco IOS Software Release 12.3 train. This means that all bug fixes available in the Cisco IOS Software Release 12.3 train will be available in the Cisco IOS Software Release 12.3BC train.
New features released in the Cisco IOS Software Release 12.3BC train will migrate and be released in a future releases of Cisco IOS Software 12.2S. This migration path for future support beyond the Cisco IOS Software Release 12.3BC train will be detailed in an updated version of this product bulletin, once determined.
Figure 1. Cisco IOS Software Release 12.3BC Train Relationship

NEW FEATURES
New features will be available for the ubr7100, ubr7200 and ubr10k platforms in the many releases of Cisco IOS Software 12.3BC. For specific items available in each release, please see the Cisco IOS Software 12.3BC release notes, available at:
Table 1 contains details about product codes, feature sets, image names, and memory requirements for the Cisco IOS Software Release 12.3(9a)BC.
ORDERING INFORMATION
Table 1. Product Codes, Feature Sets, Image Names, and Memory Requirements for Cisco IOS Software Release 12.3(9a)BC
FOR MORE INFORMATION
For more information about the Cisco IOS Software Release 12.3BC train, visit http://www.cisco.com/en/US/products/sw/iosswrel/products_ios_cisco_ios_software_releases.html or contact your local account representative
Cisco IOS Release 12.3BC software is available on Cisco.com n the Software Image Library.
http://www.cisco.com/public/sw-center/sw-ios.shtml
Cisco IOS Software Release train 12.3BC follows the standard Cisco support policy as indicated in the following link.