DP83867CS: Jumbo Frame support

Kei Kuwahara

Expert 6090 points

Part Number: DP83867CS
Other Parts Discussed in Thread: DP83867IS

Hello team,

Does DP83867CS and DP83867IS support jumbo frame?

Best Regards,

Kei Kuwahara

over 1 year ago

0 Gokul Koraganji over 1 year ago

TI__Mastermind 19180 points

Hello Kei,

Can you please let me know what is the maximum size of jumbo frame you are looking for?

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Regards,
Gokul.

0 Kei Kuwahara over 1 year ago in reply to Gokul Koraganji

TI__Expert 6090 points

Hello Gokul-san,

The maximum size of jumbo frame is 10kByte.

Does all DP83867 device support jumbo frame up to 13.5kByte? It seems the thread below mentions it, but I am not sure.

https://e2e.ti.com/support/interface-group/interface/f/interface-forum/947674/dp83867ir-jumbo-frame/3502691?tisearch=e2e-sitesearch&keymatch=DP83867%20jumbo#3502691

Best Regards,

Kei Kuwahara

+1 Gokul Koraganji over 1 year ago in reply to Kei Kuwahara

TI__Mastermind 19180 points

Hello Kei,

All versions of DP83867 can support 10kByte jumbo frames.

The maximum frame size supported is directly proportional to clock frequency offset between the two link partners.
If you can minimize the offset of clocks to +/-50ppm, then DP83867 can support 10kByte by default.
If the clock offset is +/-100ppm, then we need to program a few registers to get 10kByte jumbo frame transmission working.

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Regards,
Gokul.

0 Kei Kuwahara over 1 year ago in reply to Gokul Koraganji

TI__Expert 6090 points

Hi Gokul-san,

Thank you for your answer!

Best Regards,

Kei Kuwahara

Interface

Interface forum

DP83867CS: Jumbo Frame support