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J784S4XEVM: configuration of MTU=9000 on my ethernet interface.

brenand wilfrid
Prodigy 10 points
Part Number: J784S4XEVM


Tool/software:

Hello,

I am working with "Arago 2021.09" linux on ARMs A72 of the Jacinto SoC and for my software, i need to configure the ethernet link with a MTU = 9000.

I fisrt tried  to configure with the command "ip link set eth1 mtu 9000" but it doesn't work.

Then, i modified the *.network file of my ethernet interface but it didn't work either.

Is there a way to change this value?

with the command "ip -d link show ethx", i see maxmtu=1522, is it a hardware limitation ?

  • 0
    TI__Mastermind 40440 points

    Hi,

    CPSW has a limitation of 2020 byte packets from hardware. In linux, there is a known issue for mtu size above 1700. This is being looked into currently. But from hardware perspective itself, it can't go above 2020 bytes.

    Regards,
    Tanmay