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How to Update/Upgrade Cisco IOS Software

Update Cisco IOS Software

This refers to: Replacing one release with another without upgrading the feature set. Update to fix a bug or to replace a release that is no longer supported.

General Rules for Updating

  • Find a replacement release using the Software Table.
  • Check bugs on new release by performing a bug scrub with the Cisco Bug Toolkit. (requires Cisco.com login)
  • Download a release.

Upgrade Cisco IOS Software

This refers to: Replacing a release with one that has an upgraded feature set. Upgrade to add new features or technologies, or replace a release that is no longer supported. Upgrades are not free of charge.

Guidelines for Upgrades

Cisco IOS Auto-Upgrade Manager

Cisco IOS Auto-Upgrade Manager automates the process of updating or upgrading Cisco IOS Software versions on Cisco 1800, 2800, and 3800 Series Integrated Services Routers directly from the console with Cisco IOS 12.4(15)T or later versions.

Read Data Sheet

Subsystem In-Service Software Upgrades on the Cisco Catalyst 6500 Series with Cisco IOS Software Modularity

Read Product Bulletin