Fibre Channel Data Constructs Ordered Sets and Primitives
Frame Delimiters
• SOF Start of Frame:
–SOFix –SOFnx
• EOF End of Frame:
–EOFn –EOFt –EOFa
SOFi3 EOFn SOFn3 EOFn SOFn3 EOFt
Class 3 Sequence
Frame delimiters:
• SOF is used to mark the beginning of a frame and also indicates whether this is the first frame in a sequence and which class of service is in operation.
• EOF is used to mark the end of a frame and also indicates whether this is the last frame in the sequence and which class of service is in operation. EOF has both negative disparity and positive disparity variants to ensure that every frame ends with negative running disparity.