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Joe Harris, CCIE No. 6200 (R&S, Security & SP) is a Systems Engineer with Cisco Systems® specializing in Security. In addition to authoring Cisco Network Security Little Black Book, Joe has also been a technical reviewer for several Cisco Press publications and written articles, white papers, and presentations on various security technologies. He also assists various Certification Partners by beta testing their newest CCIE certification workbooks and has been recognized by Cisco as an SE Wall of Fame award winner.

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Extended Support for Cisco IOS Software® Release 12.4(15)T

September 23rd, 2008 • Related • Filed Under

Cisco IOS Software Release 12.4(15)T will receive extended bug fix support through December 2010. In addition, Release 12.4(15)T8 (scheduled for release in the December 2008 timeframe) and subsequent rebuilds of Release 12.4(15)T will receive a Maintenance Deployment (MD) release designator. MD defines Cisco IOS Software releases providing bug fix support and ongoing software maintenance.

Cisco is taking this action to indicate that Release 12.4(15)T8 and subsequent Release 12.4(15)T maintenance rebuilds will be treated in a similar manner as Release 12.4 Mainline. Both undergo comprehensive testing and review cycles to continuously improve and increase reliability, quality, and stability. As per Cisco policies, no new technologies or features are added to either Release 12.4 Mainline or maintenance rebuilds of Release 12.4(15)T. Release 12.4(15)T provides significant software feature benefits and hardware support over Release 12.4 Mainline. For additional details please visit:

http://www.cisco.com/en/US/products/ps8258/index.html
http://www.cisco.com/en/US/products/ps6441/prod_release_notes_list.html

Release 12.4(15)T is the last Cisco IOS T release for several Cisco hardware platforms. Please refer to the following product bulletin for more information: http://www.cisco.com/en/US/prod/collateral/iosswrel/ps8802/ps6968/ps6441/product_bulletin_c25_466578.html

For More Information
Cisco IOS Software Releases
Cisco IOS Software Release Designators (Cisco.com login access required)
Cisco IOS Software Product Lifecycle Dates & Milestones (Product Bulletin #2214)
Cisco hardware end-of-sale and end-of-life announcements
Contact your Cisco account team or ios-release-pm@cisco.com for additional questions and support.

There Is 1 Response So Far. »

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    Comment by Nikolay Shopik on 30 September 2008:

    So they planning support it until November of 2010. Sound like we not see 12.5M until end 2009 at least.
    seems 12.4T longest lived train so far

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