Cisco IOS Software Releases 12.0 Mainline

GD Announcement for Cisco IOS Software Release 12.0, No. 1033

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Product Bulletin No. 1033

General Deployment (GD) Announcement for Cisco IOS Software Release 12.0

Last Updated: February 18, 2000

Cisco IOS Software Release 12.0 has achieved General Deployment beginning with Cisco IOS maintenance release 12.0(8).

A Major Release reaches General Deployment (GD) when its quality has been proven through: extensive market exposure in diverse networks, analysis of stability and bug trends, and customer satisfaction surveys.

Finding Information on Release 12.0


A single, comprehensive resource to assist you in deploying Cisco IOS Software Release 12.0 is available on Cisco Connection Online (CCO) at:

See the "What's Hot" section for field notice announcements on Release 12.0.

Features and Platforms Supported

A list of key features and platforms supported in Release 12.0 is available on CCO at:

New Features:

Ordering and Platform Support:

Release Notes

As always, customers are advised to do acceptance testing in their own test environments, and refer to the appropriate Release Notes and caveats, before deploying Cisco IOS software in production networks. Release Notes for 12.0 are available on CCO at:

In addition, for information on a specific software issue, the Cisco Bug Navigator is available at:

Please note that Cisco IOS Release 12.0 mainline does not support features, platforms or port adapters introduced in successive maintenance releases of 12.0-based early deployment releases. Cisco IOS 12.0 has concentrated more on integrating previous, time-proven Early Deployment releases (such as Cisco IOS 11.3T, 11.1CT, 11.1CC, 11.1CA) rather than the delivery of new leading-edge functionality. Customers requiring the latest IOS services should consider the parallel IOS 12.0T(Technology) release which includes all features in Cisco IOS Release 12.0 as well as the latest features and functionality. (Please note that 12.0T is an Early Deployment release and does not achieve GD.) Cisco has a tool available to help you determine the minimum supported software for each platform supporting Cisco IOS, at:


Posted: Fri Jun 30 22:02:20 PDT 2000

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