Fibre Channel primitive signals that include its
own identifying AL_PA.
Frame
All data is transferred in a packet of information
called a frame. A frame is limited to 2112 bytes.
Information that consists of more than 2112 bytes
is divided into multiple frames.
Node
The source and destination of a frame. A node
may be a computer system, redundant array of
independent disks (RAID) array controller, or a disk
device. Each node has a 64-bit unique node name
(worldwide name) that is built into the node when it
is manufactured.
N_Port
Each node must have at least one Fibre Channel
port from which to send or receive data. This
node port is called an N_Port. Each port has a
64-bit unique port name (worldwide name) that is
built into the node when it is manufactured. An
N_Port is connected directly to another N_Port in a
point-to-point topology. An N_Port is connected to an
F_Port in a fabric topology.
NL_Port
In an arbitrated loop topology, information is routed
around a loop. A node port that can operate on the
loop is called an NL_Port (node loop port). The
information is repeated by each NL_Port until it
reaches its destination. Each port has a 64-bit
unique port name (worldwide name) that is built
into the node when it is manufactured.
Fabric
A switch, or multiple interconnected switches,
that route frames between the originator node
(transmitter) and destination node (receiver).
Fabrics do not originate nor are they the final
recipient of frames; they pass frames on to the
destination.
F_Port
The ports within the fabric (fabric port). The port is
called an F_Port. Each F_Port has a 64-bit unique
port name (worldwide name) that is built into the
node when it is manufactured.
1–2 Fibre Channel Overview
