I'm not sure this question needs much detail.
I have two Linux hosts connected to a switch with 10 ports. One host has a 10 GbE NIC and the other host has a 1 GbE NIC. Obviously I can flood the 1 GbE card with udp packets. I enable symmetric flow control on the switch for both ports and "as far as I know" have enabled it on the host NICs.
The question now is, when 1 GbE cannot keep up he sends a pause frame to the switch. From what I see, a pause frame can only go Mac-to-Mac.
Therefore, the switch does not forward the pause frame to the host that is pounding the network with traffic. Is that statement true?