Cisco IOS Versions

CISCO IOS VERSIONS packetlife.net IOS Nomenclature Release Lifecycle 12.4(7a) Mainline Maintenance Release Individu...

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CISCO IOS VERSIONS

packetlife.net

IOS Nomenclature

Release Lifecycle

12.4(7a)

Mainline Maintenance Release Individual Release Numbered Version

EOS Notice EOS EOE

12.4(9)T1

T Train

EOL 0

Maintenance Release Individual Release New Feature Identifier Numbered Version

12

36

48 Months

60

72

84

96

First Customer Shipment (FCS) The release is made available to Cisco customers on CCO

12.2(25)SEB4

S Train Release Individual Release Numbered Version

3.2.1

IOS XR Major Release Minor Release Maintenance Release

EOS Notice Notification of upcoming EOS End of Sale (EOS) The release is no longer orderable or included in manufactured shipments End of Engineering (EOE) The last day for software fixes; only TAC assistance is offered from this point End of Life (EOL) The last day for TAC support; release becomes obsolete; upgrade is only option for continued support IOS Filename

c3725-entbase-mz.124-6.T.bin

IOS Package Trees Advanced Enterprise Services

Advanced IP Services

Advanced Security

24

Enterprise Services

SP Services

Enterprise Base

Hardware Feature Set Memory Location Compression Format Maintenance Release Individual Release T Designator Deployment Classifications

IP Voice

Early Deployment (ED) Offers new feature, platform, or interface support

IP Base

General Deployment (GD) A major release considered qualified for deployment on critical devices

Advanced Enterprise Services

Advanced IP Services

Enterprise Services

Limited Deployment (LD) A major release prior to reaching its GD milestone Deferred (DF) Known defective images; should not be installed IOS Version Verification

IP Services

show version dir :

IP Base

by Jeremy Stretch

verify : v2.0