[cisco-voip] Preferred IOS 15 Version

[Nick Matthews]

I wouldn't go so far as to say you only run the BU special if you hit
a bug.  Engineering specials for IOS are generally one-off releases
for 1 customer.  Engineering specials for CUCM/Unity I believe are
simply interim images between minor releases.  Interim releases exist
for IOS, but they are rarely needed to give to customers, though they
are available.

As for BU specials, these same images existed in the 12.4 range:
12.4(15)XW, XY, XZ  as well as 12.4(22)YA and YB, etc.  It just allows
people who want the newer features sooner.  The BU gets more people to
test the code in essence, and you get a lot of the features earlier.
CME and CUBE are two of the things that regularly available in the BU
special before the main code is released.

-nick

On Tue, Feb 16, 2010 at 10:49 PM,  <lelio at uoguelph.ca> wrote:
> This is a great explanation. Thanks Nick.
>
> It looks like it's going the same route as ES's for Unity Connection.
> Basically they want everyone to start with the mainline and only upgrade to
> a BU special if they run into a particular bug.
>
> Lelio Fulgenzi, Senior Analyst
> Computing & Communications
> University of Guelph
> 519-824-4120 x56354
>
> ...sent from my iPod - please pardon my fat fingers ;)
>
> [XKJ2000]
>
> On 2010-02-16, at 6:44 PM, Nick Matthews <matthnick at gmail.com> wrote:
>
>> The new 15.0M structure is different than other codes.  In old
>> mainline code, there were possibly hundreds of bugs fixed between an
>> IOS like 12.4(3a) and 12.4(3g), or 12.4(6) and 12.4(10).
>>
>> People were tired of not knowing which code to go with, so in the
>> 15.0M the only bug fixes going into mainline are 'show stopping' bugs
>> that have serious problems or fully disable a feature of the router.
>> That being said, I believe there are only 3 bugs of that severity
>> between 15.0(1)M and 15.0(1)M1.
>>
>> This leaves two other choices - BU specials, and the T train.  The T
>> train is not released yet for the 15.1T train, so it's not an option.
>> The other option is 15.0(1)XA, which is the BU early adopter release
>> for the T train.  If you don't need the features for this train, I
>> would go with the mainline.  If you hit a bug, it's the other option
>> at this point.
>>
>> -nick
>>
>> On Tue, Feb 16, 2010 at 10:58 AM, Jason Shearer <jshearer at amedisys.com>
>> wrote:
>>>
>>> I think your options are going to be pretty limited at this point.  Only
>>> two
>>> version for the 3945 look to be 15.0(1)M1 or 15.1(1)XB.
>>>
>>> Jason
>>>
>>>
>>>
>>> From: cisco-voip-bounces at puck.nether.net
>>> [mailto:cisco-voip-bounces at puck.nether.net] On Behalf Of STEVEN CASPER
>>> Sent: Tuesday, February 16, 2010 9:50 AM
>>> To: cisco-voip at puck.nether.net
>>> Subject: [cisco-voip] Preferred IOS 15 Version
>>>
>>>
>>>
>>> Getting ready to install a 3945 router to be used as a voice gateway as a
>>> replacement device for a CMM.  It shipped with:
>>>
>>>
>>>
>>>  C3900 Software (C3900-UNIVERSALK9-M), Version 15.0(1)M1, RELEASE
>>> SOFTWARE
>>> (fc1)
>>>
>>>
>>>
>>> does anyone done any testing and have a preferred IOS version for 15?
>>>
>>>
>>>
>>> Thanks,
>>>
>>> Steve
>>>
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