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  1. Junior Member Registered Member
    Join Date
    Nov 2016
    Location
    Hawley, PA
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    1

    Certifications
    CCNA R&S
    #1

    Default CCNP Lab – IOS for 1841

    Hi all! This is my first forum post. I have 3x1841 routers in my home lab. The third was recently acquired, and has 2 IOS’s on the flash:

    c1841-adventerprisek9-mz.151-4.M8.bin
    c1841-adventerprisek9-mz.151-3.T3.bin

    I want to upgrade the other 2 routers, and would like to ask which would be better to use to upgrade. Any help would be appreciated.
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  3. Senior Member shortstop20's Avatar
    Join Date
    Dec 2006
    Location
    South Dakota
    Posts
    138

    Certifications
    CCNA R&S
    #2
    M releases are "extended maintenance" and typically more stable but that's not necessarily a concern in a lab.

    T releases commonly have new features that M releases don't yet have. I'd look at the release notes and see if the T release has any features you're looking for, probably not.
    Studying CCNP Route.

    CCNP Switch passed, 12/10/2015
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  4. Senior Member
    Join Date
    Sep 2014
    Location
    Minnesota
    Posts
    768

    Certifications
    CCNA:R&S, VCA6-DCV, Sec+
    #3
    it doesn't matter.
    Just be sure to make backups to your tftp server
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