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  1. #1
    Join Date
    Nov 2007
    Location
    Kwaj
    Posts
    325

    Default Cisco IOS Versions

    Just something I'm curious about...

    I just bought a 3550 48-port switch and it has the following IOS loaded:

    c3550-ipservicesk9-mz.122-44.SE6.bin

    I have access to a newer(?) version:

    c3550-ipservicesk9-mz.122-46.SE.bin

    I assume, of course, that it doesn't really matter for the CCNA studies, but I would still be interested in knowing what changed from '-44.se6' to '-46.SE'. Or, what's the difference?

    If we were talking about a production environment, would this be like an upgrade or a patch or just a different version that has a couple of different features and you just simply could have purchased either one.

    Does Cisco have anything 'easily useable' to compare the two?

    Thanks....

    Note: sho ver on the loaded IOS says, "Running Layer 2/3 Switching
    image". Since this was sold to me as a WS-3550-48-SMI, I wasn't sure that would be the case. I'm glad it is.
    I thought I was wrong once. But, of course, I was wrong.

  2. #2
    Join Date
    Mar 2008
    Posts
    2,888

    Default

    Here is your new best friend

    http://tools.cisco.com/ITDIT/CFN/jsp/index.jsp

    I have looked and it seem to be almost the same?
    Maddox Thomas-Clark 14/10/2008
    Bean Thomas-Clark 18/09/2007
    Big Evils Cisco World
    Linkedin

  3. #3
    Join Date
    Nov 2007
    Location
    Kwaj
    Posts
    325

    Default

    Hey, thanks, that does have a comparison feature. I put both of these versions in and it doesn't show any differences. Hmmm...
    I thought I was wrong once. But, of course, I was wrong.

  4. #4
    Join Date
    Mar 2008
    Posts
    2,888

    Default

    If i were to look at these two i would assume that they are the same here is why.

    122-44.SE6
    122-46.SE

    These are both S train releases the first has a numbered version 6, the second has no version number so we can assume it is the first release. As the second image is release 46 and the last image was SE6 - they have taken the last production image of .44 and started the new 46 image, hence why this is 46. If the last .44 was .44.SE5 you would have seen a 45.SE (there is no .45 image).

    This is just a guess, but when looking at other image numbering for the 3550 122 release - for example the 122.50 has SE, SE1, SE3, SE4, SE5. There is a 122.52SE and then it is a 122.55SE. The last individual release number is the same as the numbered version.

    But it is just a guess - in the crazy world of Cisco IOS who knows!!!!!!
    Maddox Thomas-Clark 14/10/2008
    Bean Thomas-Clark 18/09/2007
    Big Evils Cisco World
    Linkedin

  5. #5
    Join Date
    Nov 2007
    Location
    Kwaj
    Posts
    325

    Default

    Now i have a headache.

    I thought I was wrong once. But, of course, I was wrong.

  6. #6
    Join Date
    Mar 2008
    Posts
    2,888

    Default

    You need Crown!
    Maddox Thomas-Clark 14/10/2008
    Bean Thomas-Clark 18/09/2007
    Big Evils Cisco World
    Linkedin

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