ethernet jumbo frames

Chris Wilson

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

over 13 years ago

0 Sujith KV over 13 years ago

TI__Intellectual 2525 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.

0 Chris Wilson over 13 years ago in reply to Sujith KV

Intellectual 340 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

0 Sujith KV over 13 years ago in reply to Chris Wilson

TI__Intellectual 2525 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.

0 Chris Wilson over 13 years ago in reply to Sujith KV

Intellectual 340 points

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

Chris

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ethernet jumbo frames