1. A method for implementing conditional packet alterations based upon a transmit port comprising the steps of: providing a selection mechanism for implementing the packet alterations; providing a hardware multiplexer, and an indirect data array for storing packet alteration data to implement said selection mechanism for implementing packet alterations; applying a sequence of frame alteration instructions and transmit port numbers associated with a packet being transmitted to said multiplexer of said selection mechanism; performing the alterations on said packet being transmitted responsive to said applied sequence of said frame alteration instructions and said port numbers associated with said packet being transmitted; and transmitting said packet from each respective transmit port for said transmit port numbers, responsive to performing the alterations.