[j-nsp] bursit size for OC-192

[Andrew Jimmy]

Calculating burst size for low interfaces is very simple which is ten times
the interface's MTU. For a high-speed interface, such as an OC-192, the
recommended burst size is the transmit rate of the interface times 3-5
milliseconds (AS per JNCIE book). Can someone write a real-time and
practical example that how you calculate this 3-5 milliseconds thing
exactly!