Generic Flow Control (GFC) provides flow control at the UNI levelVirtual Path Identifier (VPI) identifies the cell’s next VP to pass through a series of network. Virtual Channel Identifier (VCI) Identifies the cell’s next VC inside the VP.Payload Type (PT) The first bit indicates whether the cell contains user data (bit 0) or control data (bit 1). The second bit indicates congestion (0 = no congestion, 1 = congestion), and The third bit indicates whether the cell is the last in a series of cells (1 = last cells for the frame)Cell Loss Priority (CLP) Indication if the cell should be discarded if it encounters extreme congestions as it moves through the network (bit 1 = discarded in referenced to cells with CLP equal to 0)Header Error Control (HEC) Calculates checksum only on the first 4 bytes of the header. HEC can detect error and correct a single bit error in these bytes—thus preserving the cell rather than discarding it.
đang được dịch, vui lòng đợi..