Cisco Cisco IOS Software Release 15.3(1)S プリント

 

 

Product Bulletin 

© 2014 Cisco and/or its affiliates. All rights reserved. This document is Cisco Public. 

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Cisco IOS Software Support Timeline Starting with 
Software Release 15.3(3)S 

Last updated: May 2014 

Introduction 

This product bulletin describes the support timeline and end-of-life guidelines for Cisco IOS

®

 15S Software. 

Cisco IOS 15S Software Release Model 

Cisco IOS 15S Software releases are time-based, each with a fixed release date. The schedule specifies three 

individual software releases per year at four month intervals. 

Figure 1.    Cisco IOS 15S Software Release Versioning 

IOS 15

.0(

1

)

S

1

 

Cisco IOS 15S Software Support 

● 

Each Cisco IOS 15S Software release is classified as either a Standard-Support or Extended-Support 

release 

● 

◦ 

18 months sustaining support from First Customer Shipment (FCS) with three scheduled rebuilds 

◦ 

Rebuilds are typically released at 3-, 3-, and 6-month intervals after FCS 

● 

◦ 

48 months sustaining from FCS with eight scheduled rebuilds. The timing of these rebuilds is typically 

released at 3-, 3-, 4-, 4-, 4-, 6-, 6-, and 6-month intervals after FCS 

● 

Cisco makes no commitment to introduce software fixes to the affected Cisco IOS 15S Software release 

after the final planned rebuild release 

● 

Optional Rebuilds: Software problems found after the final scheduled rebuild release will be fixed in a 

subsequent major Cisco IOS 15S Software release. An exception may arise to address mission-critical, 

high-severity software fixes and security vulnerabilities, possibly resulting in an additional rebuild release, 

after the final scheduled rebuild date (but before the end-of-software maintenance milestone), on an as-

needed basis at the discretion of Cisco. No software fixes will be introduced to the affected Cisco IOS 15S 

Software release after the end-of-vulnerability and security (EoVS) milestone. 

● 

After the EoVS milestone, the Cisco Technical Assistance Center (TAC) will provide customer support on 

the affected Cisco IOS 15S Software release, within the guidelines set by existing Cisco end-of-life policies, 

at the end-of-software-maintenance milestone.