Hello Chi keung,
I found the following information after a search:
http://tools.ietf.org/html/rfc2285#section-3.6.1
"3.6.1
Forwarding rate (FR)
Definition:
The number of frames per second that a device can be observed to
successfully transmit to the correct destination interface in
response to a specified offered load."
http://tools.ietf.org/html/rfc1242#section-3.17
"3.17
Throughput
Definition:
The maximum rate at which none of the offered frames
are dropped by the device."
Follow the links for further details.
