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TI Home » TI E2E Community » Support Forums » Embedded Software » StarterWare » StarterWare forum » ethernet jumbo frames
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ethernet jumbo frames

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Chris Wilson
Posted by Chris Wilson
on Jun 07 2012 10:37 AM
Intellectual340 points

Hi

Has anyone done any work using Ethernet jumbo frames with the Starterware lwip on the EVM335x board?  Is it possible?  I can get the normal Ethernet frames working OK.  Thanks.

Regards

Chris

AM335x StarterWare lwIP am335x evm
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  • Sujith KV
    Posted by Sujith KV
    on Jun 19 2012 22:56 PM
    Intellectual2505 points

    Hi Chris,

    StarterWare currently implemented and tested just to support normal frames. But you can try jumbo frames by modifyin MTU definition in sitaraif.c and TCP_MSS in lwipopts.h file. Also, I think you also have to write RX_MAXLEN register in the sliver with the length of jumbo frame(including header length). Also, please take care of the pbuf length to be allocated to support jumbo frames. But we have not tried the same experiment.

    Cheers,

    Sujith.

     

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  • Chris Wilson
    Posted by Chris Wilson
    on Jul 16 2012 09:05 AM
    Intellectual340 points

    Hi Sujith

    Is it possible for you to let me know in which source file RX_MAXLEN resides and possibley indicate where the pbuf length needs to be changed?

    Thank you.

    Regards

    Chris

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  • Sujith KV
    Posted by Sujith KV
    on Jul 16 2012 23:08 PM
    Intellectual2505 points

    Hi Chris,

    I suggest you to wait for the next release of StarterWare which will happen by the end of July. This release will have some major changes in CPSW port implementation for lwIP and will have cache support etc. It would be more stable also. I feel its better you start experimenting on the next release.

    Cheers,

    Sujith.

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  • Chris Wilson
    Posted by Chris Wilson
    on Jul 18 2012 02:30 AM
    Verified Answer
    Verified by Chris Wilson
    Intellectual340 points

    Thanks.  I can wait until the end of July OK.

    Chris

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