IOS Version Breakdown

Unanswered Question
May 15th, 2009

PLease take a look at the sh version snippet.

1)What is the frequency of a IOS version being in this format? Particularly the second number in brackets (18a)

===========sh verion===========

Cisco Internetwork Operating System Software

IOS (tm) C5RSM Software (C5RSM-DSV-M), Version 12.0(10)W5(18a) RELEASE SOFTWARE

I have this problem too.
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Giuseppe Larosa Fri, 05/15/2009 - 08:46

Hello Sukesh,

I'm not sure to have understood,

This is an IOS image that runs on a RSM for Catalyst 5000.

IOS version is 12.0(10)W5

the final (18a) means it is a rebuild the 18th rebuild with a sub-rebuild a.

This is typical of end of sales devices where the policy is to freeze the major version and to make only minor changes rebuilds as needed.

Hope to help


skumar7193 Fri, 05/15/2009 - 09:58

Thanks that helps.

In your experience, how many devices in production will have this version all the way up to nth rebuild and sub-build


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