Seagate Fibre Channel Interface - Manual (Page 405)

Fibre Channel Interface Manual, Rev. D 391
VC_RDY
Virtual circuit ready.
Vendor unique
Functions, code values, and bits not defined by FC-PH and set aside for private usage between parties using
FC-PH. Caution: different implementations of FC-PH may assign different meanings to these functions, code
values, and bits.
Virtual circuit (VC)
A unidirectional path between two communicating N_Ports that permits Class 4 service to be used. Two virtual
circuits are required to form a Class 4 circuit.
Virtual Circuit Credit (VC_Credit)
The number of receiver buffers allocated to a virtual circuit by an F_Port. It represents the maximum number of
frames that an N_Port may transmit without causing a buffer overrun condition at the F_Port receiver.
Virtual circuit credit limit
The maximum number of VC_Credits available for a virtual circuit. It represents the maximum number of
VC_Credits held by an N_Port on a given virtual circuit.
Virtual Circuit Identifier (VC_ID)
An identifier associated with either the originator (OVC_ID) or responder (RVC_ID) for a virtual circuit.
Virtual path
A fixed route through a fabric in support of a virtual circuit.
WAN
Wide area network.
Well-known addresses
A set of address identifiers defined in FC-PH to access global server functions such as a name server.
Word
A string of four contiguous bytes occurring on boundaries that are zero modulo 4 from a specified reference.
Worldwide_Name
A Name_Identifier which is worldwide unique, and represented by a 64-bit unsigned binary value.
WWN
Worldwide name.
X_ID
Exchange_Identifier.