AnsweredAssumed Answered

Maximum Size of Jumbo Frame

Question asked by Radek Raichel on Aug 17, 2017
Latest reply on Aug 20, 2017 by Pavel Chubakov

Hello NXP Community,

 

I have few questions regarding maximum size of Jumbo Frame by QorIQ/Layerscape ARMv8 platform.

 

There is a maximum size of L2 packet (MAXFRM) set to 9600. And there is also configuration point:

If I understand the hw implementation of eMAC correctly, Tx-Buffer is 10kB and Rx-Buffer is 2kB.

 

My questions:

1. how does match size of max l2 message (MAXFRM=9600) with rx-buffer?

2. can I change the size of MAXFRM to 15000, 20000, 50000, ...? and if yes, how?

3. optimization for jumbo frames cannot be done for LS1043, but why?

 

Thank you!

 

Best Regards,

Radek

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