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Cisco IOS Software Releases 11.1

Cisco IOS Software Release 11.1

Document ID: 18852


Major Release Summary



Description

Cisco IOS® Software Release 11.1 is a non-general deployment (GD) release train and was released in March 1996. As of 1998, the Cisco IOS Software Release 11.1 base code has transitioned from the standard 7-week maintenance to a 13-week release model. This indicates that the code has reached a higher maturity level characterized by its quality, stability, and defect trend. For more information, see the following pages:

Target Market

Cisco Systems, Inc. released Cisco IOS Software Release 11.1 for all active platforms.

Product Support

Cisco IOS Software main releases support all active Cisco shipping products.

Related Cisco IOS Releases

Cisco IOS Software Release 11.1 has spawned several early deployment (ED) special releases including Cisco IOS Software Releases 11.1CA, Cisco IOS 11.1CC, Cisco IOS 11.1CT, and Cisco IOS 11.1IA. These early deployment releases regularly synchronize with Cisco IOS Software Release 11.1 to catch base code bug fixes.

Product/Feature Integration

New products and features were added to each subsequent maintenance release. For more information, see the following pages:

Maintenance Releases

Cisco IOS Software Release 11.1 uses a 13-week release model. A maintenance release is delivered once every 13 weeks. An interim build is executed once every three weeks.

Interim Builds

Interim builds are not recommended and are not fully tested. Customers will only be provided with interim builds when a critical defect renders the maintenance release unusable. For more information, see the Software Releases page.

7-week maintenance cycle: Prior to Cisco IOS Software Release 11.1(16).
13-week maintenance cycle: A maintenance release is delivered once every 13 weeks after Cisco IOS 11.1(17).

Maintenance Release Synchronization Points

Not applicable. For more information, see the Projected Release Dates for Cisco IOS Software Product Bulletin.

Recommended Migration

If currently using The recommended upgrade path is
Cisco IOS Software Release 11.1(x) Cisco IOS Software Release 11.2 or 12.0(x)
Cisco IOS Software Release 11.1CA Cisco IOS Software Release 12.0
Cisco IOS Software Release 11.1CC Cisco IOS Software Release 12.0S
Cisco IOS Software Release 11.1CT Cisco IOS Software Release 12.0ST
Cisco IOS Software Release 11.1IA Cisco IOS Software Release 12.0T

The migration path is the logical superseding software. The uniqueness of each network requires that customers verify support for hardware, features, and protocols prior to a massive network upgrade.

Year 2000 (Y2K) Compliant

Cisco IOS 11.1 is Y2K compliant.

General Deployment (GD) Plan

The Cisco IOS Software Release 11.1 train never achieved GD status.

Life Cycle

Cisco IOS Software Release 11.1 reached end of engineering (EOE) in January 1999. The release reached end of sale (EOS) status on October 12, 1998. EOE indicates that regularly scheduled maintenance releases will no longer occur. For more information, see the following pages:

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Updated: May 15, 2006 Document ID: 18852