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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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EoS/EoL Announcement for Cisco IOS Major Release 12.3

January 22nd, 2008 • Related • Filed Under

This is a reminder for the upcoming March 15, 2008 End of Software Maintenance (EoSW) milestone date for Cisco IOS Software Release 12.3 Mainline. The EoSW milestone denotes the last day Cisco Engineering will release any final software maintenance releases, rebuilds, or bug fixes for the Cisco IOS Release 12.3 Mainline. After this date, Cisco Engineering will no longer develop, repair, maintain, or test the product software.

Software maintenance and bug fix support beyond the March 15, 2008 End of Software Maintenance date for Cisco IOS Software Release 12.3 Mainline is provided via Release 12.4 Mainline or Cisco IOS Software Release 12.4T (see Release 12.3 Mainline Migration Options section below).

Product Bulletin EOL5061 on Cisco.com is the EoS/EoL announcement for Cisco IOS Software Release 12.3 Mainline:

Product Bulletin

Release 12.3 Mainline Migration Options

Customers should migrate to the latest release of Cisco IOS Software Release 12.4 Mainline or Release 12.4T:

  • Release 12.4 Mainline inherits Cisco IOS Software Release 12.3 Mainline functionality & features previously introduced in Cisco IOS Software Release 12.3T (and prior), and provides ongoing software maintenance http://www.cisco.com/en/US/products/ps6350/index.html.
  • Release 12.4T integrates the latest technology introductions & new hardware support, features previously introduced in Cisco IOS Software Release 12.3T (and prior), and provides ongoing software maintenance http://www.cisco.com/en/US/products/ps6441/index.html.

Note: The General Deployment (GD) program for Cisco IOS Software has been retired. GD will not be applied to any future Cisco IOS Software maintenance releases or rebuilds starting from Cisco IOS Software Release 12.4 Mainline. Refer to the GD retirement product bulletin announcement for more details:

Product Bulletin

Additional Information Product Bulletin 2214 on Cisco.com provides details on Cisco IOS Software Product Lifecycle Dates and Milestones:

Product Bulletin

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