Cisco ios versions
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This document summarizes Cisco IOS version nomenclature and release lifecycles. It outlines the different types of IOS releases including mainline, T train, S train, and IOS XR releases. It also describes the stages a release goes through such as first customer shipment, end of sale, end of engineering support, and end of life. Finally, it provides information on IOS package trees, filenames, and commands to verify installed versions.
Cisco ios versions
- 1. CISCO IOS VERSIONS packetlife.net IOS Nomenclature Release Lifecycle Mainline 12.4(7a) EOS Notice Maintenance Release EOS Individual Release Numbered Version EOE T Train 12.4(9)T1 EOL 0 12 24 36 48 60 72 84 96 Maintenance Release Months Individual Release New Feature Identifier First Customer Shipment (FCS) Numbered Version The release is made available to Cisco customers on CCO EOS Notice Notification of upcoming EOS S Train 12.2(25)SEB4 End of Sale (EOS) Release The release is no longer orderable or included in Individual Release manufactured shipments Numbered Version End of Engineering (EOE) The last day for software fixes; only TAC assistance is offered from this point IOS XR 3.2.1 End of Life (EOL) Major Release The last day for TAC support; release becomes obsolete; Minor Release upgrade is only option for continued support Maintenance Release IOS Filename IOS Package Trees c3725-entbase-mz.124-6.T.bin Hardware Advanced Enterprise Services Feature Set Memory Location Advanced IP Services Enterprise Services Compression Format Maintenance Release Individual Release Advanced Enterprise T Designator SP Services Security Base Deployment Classifications IP Voice Early Deployment (ED) Offers new feature, platform, or interface support General Deployment (GD) IP Base A major release considered qualified for deployment on critical devices Limited Deployment (LD) Advanced Enterprise Services A major release prior to reaching its GD milestone Deferred (DF) Known defective images; should not be installed Advanced IP Services Enterprise Services IOS Version Verification IP Services show version dir <filesystem>: IP Base verify <filesystem>:<image> by Jeremy Stretch v2.0