Leo Laohoo Thu, 06/25/2009 - 14:56
User Badges:
  • Super Gold, 25000 points or more
  • Hall of Fame,

    The Hall of Fame designation is a lifetime achievement award based on significant overall achievements in the community. 

  • Cisco Designated VIP,

    2017 LAN, Wireless

Hi George,


When it comes to IOS upgrades, we follow the old adage "If it ain't broke, don't fix it".


Every IOS has a potential for a bug. It depends on the features and fuctions you are currently employing.


The good thing about Cisco is that if a specific release is truely "buggy" Cisco takes necessary steps to pull it out of the download page.


Before you start downloading the IOS, read through the Release Notes to better warn you of the potential bugs you may encounter within your network.


If you have the opportunity, test the firmware until you are satisfied with the response.


Hope this helps.

Jon Marshall Thu, 06/25/2009 - 15:05
User Badges:
  • Super Blue, 32500 points or more
  • Hall of Fame,

    Founding Member

  • Cisco Designated VIP,

    2017 LAN, WAN

George


Just to add to Leo's post.


Apart from bugs the only other reason to look to upgrade is if you need new features that are not supported in your current IOS.


If this is the case then you usually know exactly which IOS you need to use.


Jon

Joseph W. Doherty Thu, 06/25/2009 - 16:50
User Badges:
  • Super Bronze, 10000 points or more

Find the version with the features you must have within the current offerings, e.g. 12.2.#-SE, where # is 35, 37, 40, 44, 46, 50, then latest within that version. In theory, later/latest releases within the same version, e.g. 12.2.44-SE, -SE1, -SE2, -SE3, -SE4, -SE5, -SE6, are bug fixes, so they should improve stability. However, within 12.2.44-SE, both SE4 and SE5 were deferred (pulled), so the theory doesn't always hold in practice.


[edit]

Release notes for latest: http://www.cisco.com/en/US/docs/switches/lan/catalyst3750/software/release/12.2_50_se/release/notes/OL18263.html Table 5 shows release IOS features.

George Thomas Thu, 06/25/2009 - 18:19
User Badges:
  • Blue, 1500 points or more

Hello All,


Thanks a lot for your responses but I am looking for a feature which was added in 12.2(35). Since that feature is still present in the successive releases, I am not quite sure if I need to stick to 12.2(35) or move to the later releases.


Thanks,

G

Leo Laohoo Thu, 06/25/2009 - 19:30
User Badges:
  • Super Gold, 25000 points or more
  • Hall of Fame,

    The Hall of Fame designation is a lifetime achievement award based on significant overall achievements in the community. 

  • Cisco Designated VIP,

    2017 LAN, Wireless

Hi George,

Thanks for the ratings.


If your current version supports the feature you need, would you mind sharing your hesitation to upgrade to later releases?

George Thomas Thu, 06/25/2009 - 19:43
User Badges:
  • Blue, 1500 points or more

Hello,


I don't have any hesitation on upgrading the Ios. I am looking for a stable version to upgrade to .


Thanks,

G

Joseph W. Doherty Fri, 06/26/2009 - 02:26
User Badges:
  • Super Bronze, 10000 points or more

If you don't need any features beyond those in 12.2(35), I would suggest, generally, only upgrading to the latest version of 12.2(35) unless there's a bug documented in that release that was only fixed in a later version release and this bug impacts your operations. The reason for this suggestion, any time code is changed, there's some chance of introducing new bugs. If the code is being changed only to fix other bugs, odds are there's a net improvement. If the code is being changed to provide new feature(s), odds aren't as good.

Actions

This Discussion