Frankly, I doubt it will, but any information is useful in this context… what you really want to find out is where the sequence of events “occurrence of ICMP request packet in the PHY”-“copy of the packet from the RX DMA descriptor ring to an internal packet” - “processing of the packet in the +TCP SW” - “compute the response packet” - “schedule response packet to the TX DMA response ring” - “PHY puts the packet out onto the net” is broken.