Seagate Fibre Channel Interface - Manual (Page 404)

390 Fibre Channel Interface Manual, Rev. D
ULP
Upper layer protocol.
ULP
Upper Level Protocol.
ULP process
A function executing within an FC node which conforms to Upper Layer Protocol (ULP) defined protocols when
interacting with ULP processes residing in other FC nodes.
Uncategorized information category
One of the information categories indicated in the frame header.
Unrecognized ordered set
A transmission word containing a K28.5 in its first (leftmost) position but not defined to have meaning by FC-
PH.
Unsolicited control
One of the information categories indicated in the frame header.
Unsolicited data
One of the information categories indicated in the frame header.
Upper level
A level above FC-2.
Upper Level Protocol (ULP)
The protocol user of FC-4.
Valid
A validity control bit indicates if a field is valid, in which case, the value in the field shall be treated as valid. If a
validity control bit indicates that a field is invalid, the value in the field shall be treated as invalid (see meaning-
ful).
Valid data byte
A string of eight contiguous bits within FC-1 which represents a value with 0 to 255, inclusive.
Valid frame
A frame received with a valid Start_of_Frame (SOF), a valid End_of_Frame (EOF), valid data characters, and
proper cyclic redundancy check (CRC) of the frame header and data field.
VC
Virtual circuit.
VC_Credit
Virtual circuit credit.
VC_ID
Virtual circuit identifier.