dont know you are still looking for answer
he switching forwarding rate= ports number × corresponding packet forwarding rate of ports.
The packet forwarding rate for gigabit port=1,000,000,000bps/8bit/(64+8+12)byte=1,488,095ppsPps is short for packets per second. Because we use 64 bytes per packet as the test standard of packet forwarding rate, and the 8 bytes are for the frame header. The 12 bytes are for the frame interval.
So for the gigabit port, the packet forwarding rate is 1,488,095pps=1.488Mpps. And for the fast ethernet port, the packet forwarding rate is 0.1488Mpps.
On ES-4124, there are 24 fast ethernet ports and 4 gigabit ports.
The switching forwarding rate=0.1488Mpps*24+1.488Mpps*2=6.54Mpps
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Thanks
Arun