Linux/AM3352: Is there any way to limit the throughput of CPSW?

Part Number:AM3352

Tool/software: Linux

Dear Champs,

Is there any way to limit the Ethernet throughput of CPSW?

My customer is developing VoIP using AM3352-600Mhz, and they failed in final throughput test with PC connected.

VoIP phone is connected between Ethernet and PC, and eth0 of AM3352 CPSW is connected to Ethernet and eth1 of AM3352 CPSW is connected to PC.

When they tried to call while 100Mbps throughput from PC, the CPU load was over 90% and voice was discontinued and key pads were not work.

So, my customer would like to limit Ethernet throughput of eth1 of AM3352 up to 50Mbps, but could not find solution yet.

They tried to use 'TC' command, but it was not work for 'uploading'.

Could you please help if there is any way to limit ethernet throughput of eth1 of CPSW?

And also, if there is any way to make higher priority for RTP packet as I questioned before, it also would be helpful.

https://e2e.ti.com/support/processors/f/791/t/554414?tisearch=e2e-sitesearch&keymatch=voip%20AND%20ethernet

Thanks and Best Regards,

SI.