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Excessive undersized/giant packets. error on HP devices

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  • 1.  Excessive undersized/giant packets. error on HP devices

    Posted Jul 23, 2015 11:26 AM

    Hi

    I have HP 2610 and 2530 POE switches to which I connect my aps (AP 135, AP 105, AP 205).

    Looking at the logs i see a lot of the following messages regarding the ports to which aps are connected:

     

     

    W 07/23/15 15:32:47 00327 FFI: port 4-Excessive undersized/giant packets. See help.
    W 07/23/15 15:32:27 00327 FFI: port 3-Excessive undersized/giant packets. See help.

     

     

    The MTU size is set to "" in SAP MTU, so it should be set automatically.

    Why I got those messages? 

    What can I do?


    #AP205


  • 2.  RE: Excessive undersized/giant packets. error on HP devices

    EMPLOYEE
    Posted Jul 23, 2015 11:27 AM


  • 3.  RE: Excessive undersized/giant packets. error on HP devices

    Posted Jul 23, 2015 11:53 AM

    Yes, I had read the article, but didn't read the link posted below

     

    http://community.arubanetworks.com/t5/ArubaOS-and-Controllers/Oversize-jumbo-frame-errors/m-p/5421/highlight/true#M1860

     

    so setting the MTU size to 1500 is in this case a best practice, did I understood it correctly?

     

     



  • 4.  RE: Excessive undersized/giant packets. error on HP devices
    Best Answer

    Posted Jul 23, 2015 12:05 PM

    Yes, if you set the AP MTU to 1500, it should solve the problem.

     

    Thanks,

    Massimo



  • 5.  RE: Excessive undersized/giant packets. error on HP devices

    Posted Feb 04, 2021 02:55 PM
    This is a little dated.  Is this still relevant with 8.x code?  I am seeing the same thing here on an HPE/Aruba switch with an Aruba AP attached to it.

    ------------------------------
    Jim Lucas
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  • 6.  RE: Excessive undersized/giant packets. error on HP devices

    EMPLOYEE
    Posted Feb 04, 2021 03:29 PM
    Yes.

    ------------------------------
    Any opinions expressed here are solely my own and not necessarily that of Hewlett Packard Enterprise or Aruba Networks.
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  • 7.  RE: Excessive undersized/giant packets. error on HP devices

    Posted Feb 05, 2021 09:52 AM
    Colin,

    I cannot access some of the articles linked from above.  Is this a problem or just an annoyance?  If nothing is broken, should I be concerned?

    Thanks,
    Jim

    ------------------------------
    Jim Lucas
    ------------------------------



  • 8.  RE: Excessive undersized/giant packets. error on HP devices

    EMPLOYEE
    Posted Feb 05, 2021 01:23 PM
    That link was before the forum was migrated.  The tl;dr is to set the MTU in the AP system profile to 1500 to stop the "giants".

    ------------------------------
    Any opinions expressed here are solely my own and not necessarily that of Hewlett Packard Enterprise or Aruba Networks.
    ------------------------------



  • 9.  RE: Excessive undersized/giant packets. error on HP devices

    Posted Aug 10, 2022 04:05 AM

    Hi.

    I cannot find any MTU settings in Aruba central? (Checked under Access point (tab) -> config -> System (tab) and wish "show advanced").

    Could you please provide a screenshot or a more exact description of where/how this setting is accessed/modified?


    (funny thing is I'm 99.9% sure I've seen MTU during setups lots of times so I'm wondering if it's been removed in newer versions of central)




  • 10.  RE: Excessive undersized/giant packets. error on HP devices

    EMPLOYEE
    Posted Aug 10, 2022 04:26 AM
    Unless you are tunneling traffic from an access point to a controller, this thread doesn't apply to Central-Based Instant access points.

    ------------------------------
    Any opinions expressed here are solely my own and not necessarily that of Hewlett Packard Enterprise or Aruba Networks.

    HPE Design and Deploy Guides: https://community.arubanetworks.com/support/migrated-knowledge-base?attachments=&communitykey=dcc83c62-1a3a-4dd8-94dc-92968ea6fff1&pageindex=0&pagesize=12&search=&sort=most_recent&viewtype=card
    ------------------------------



  • 11.  RE: Excessive undersized/giant packets. error on HP devices

    Posted Aug 10, 2022 05:09 AM
    Thank you for the quick answer.
    I see, but how then do I get rid of the "Excessive undersized/giant packets" warning (that also turn my overview map red as if switches are down 🙄) for certain switch ports that are connected to Aruba AP:s?


  • 12.  RE: Excessive undersized/giant packets. error on HP devices

    Posted 27 days ago
    Actually it does - managing IAPs and switches in Central applies as switch default MTU sizes are 1500 and IAP default MTU sizes are 1300. Executing a CLI command of "mtu 1500" will not change the SAP/RAP MTU sizes of your br0 bridge and it will not remedy your "Excessive undersized/giant packets" alerts.

    Unfortunately I have not yet found the fix-action.