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Glossary-8 SilkWorm 3800 Hardware Reference
ordered set
A transmission word that uses 8B/10B mapping and begins with the K28.5
character. Ordered sets occur outside of frames, and include the following items:
•
Frame delimiters: Mark frame boundaries and describe frame contents.
•
Primitive signals: Indicate events.
•
Primitive sequences: Indicate or initiate port states.
Ordered sets are used to differentiate fibre channel control information from data
frames and to manage the transport of frames.
packet
A set of information transmitted across a network. See also frame.
participating
mode
A mode in which an L_Port in a loop has a valid AL_PA and can arbitrate, send
frames, and retransmit received transmissions. See also L_Port, non-participating
mode.
path selection
The selection of a transmission path through the fabric. Brocade switches use the
FSPF protocol. See also FSPF.
phantom
address
An AL_PA value that is assigned to an device that is not physically in the loop.
Also known as phantom AL_PA.
phantom
device
A device that is not physically in an arbitrated loop but is logically included
through the use of a phantom address.
PLOGI
Port login. The port-to-port login process by which initiators establish sessions
with targets. See also FLOGI.
point-to-point
A fibre channel topology that employs direct links between each pair of
communicating entities. See also topology.
port cage
The metal casing extending out of the fibre channel port on the switch, and into
which a GBIC or SFP transceiver can be inserted. See also GBIC, SFP.
Port_Name
The unique identifier assigned to a fibre channel port. Communicated during
login and port discovery.
POST
Power on self-test. A series of tests run by a switch after it is powered on.
primary FCS
switch
Primary fabric configuration server switch. The switch that actively manages the
configuration and security parameters for all switches in the fabric. See also
backup FCS switch, FCS switch.
private device
A device that supports arbitrated loop protocol and can interpret 8-bit addresses,
but cannot log into the fabric.
private loop
An arbitrated loop that does not include a participating FL_Port.
private
NL_Port
An NL_Port that communicates only with other private NL_Ports in the same
loop and does not log into the fabric.
protocol
A defined method and set of standards for communication.
public device
A device that supports arbitrated loop protocol, can interpret 8-bit addresses, and
can log into the fabric.
public loop
An arbitrated loop that includes a participating FL_Port, and may contain both
public and private NL_Ports.
public NL_Port
An NL_Port that logs into the fabric, can function within either a public or a
private loop, and can communicate with either private or public NL_Ports.
quad
A group of four adjacent ports that share a common pool of frame buffers.