An input port is described having an input policing unit that checks if a virtual lane has a sufficient number of credits to carry an input packet received by the input policing unit. The input port also has a request manager that generates a request for the packet to be switched by a switching core....http://www.google.de/patents/US6922749?utm_source=gb-gplus-sharePatent US6922749 - Apparatus and methodology for an input port of a switch that supports cut-through operation within the switch
