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,