Configures interface Rate Limit (Packet that can be transferred
on a port at a particular second).
This object's value will take effect on the interface speed. Based
on the operating speed of the port, the rate limit will be applied.
This value can also be affected by the metering. A value of zero(0)
disable rate limiting i.e. sets the port to full speed. The value can
be set between 64~100000(Kbits per second) in FE port, 64~1000000
(Kbits per second) in GE port.
(Note: The multiple of 1850 Kbits/sec will be set automatically because
the resolution of Giga-port Tx bandwidth control is 1850 Kbits/sec.)