IBM TotalStorage DS300 Best Practices Manual page 652

Fibre Channel over IP Fibre Channel over IP is
defined as a tunneling protocol for connecting
geographically distributed Fibre Channel SANs
transparently over IP networks.
Fibre Channel Protocol
operations to Fibre Channel.
Fibre Channel Standard An ANSI standard for a
computer peripheral interface. The I/O interface
defines a protocol for communication over a serial
interface that configures attached units to a
communication fabric. Refer to ANSI X3.230-199x.
FICON An I/O interface based on the Fibre
Channel architecture. In this new interface, the
ESCON protocols have been mapped to the FC-4
layer, that is, the Upper Level Protocol layer, of the
Fibre Channel Architecture. It is used in the S/390
and z/Series environments.
File system An individual file system on a host.
This is the smallest unit that can monitor and extend.
Policy values defined at this level override those that
might be defined at higher levels.
FL_Port An F_Port is a fabric port that is loop
capable. It is used to connect NL_Ports to the switch
in a loop configuration.
field replaceable unit (FRU)
replaced in its entirety when any one of its required
components fails.
Full-Duplex A mode of communications allowing
simultaneous transmission and reception of frames.
G
Gateway In the SAN environment, a gateway
connects two or more different remote SANs with
each other. A gateway can also be a server on which
a gateway component runs.
Gigabit Interface Converter (GBIC) a transceiver
to convert the internal electrical communication
transport to fibre gigabit transport. For 1 Gbps fibre.
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IBM TotalStorage DS300 and DS400 Best Practices Guide
the mapping of SCSI-3
An assembly that is
Gigabit Link Module (GLM)
Channel transceiver unit that integrates the key
functions necessary for installation of a Fibre
channel media interface on most systems.
Gratuitous ARP Most hosts on a network will send
out a Gratuitous ARP when they are initializing their
IP stack. This Gratuitous ARP is an ARP request for
their own IP address and is used to check for a
duplicate IP address. If there is a duplicate IP
address, then the stack does not complete
initialization. See Address Resolution Protocol.
H
half duplex In data communication, pertaining to
transmission in only one direction at a time. Contrast
with duplex.
Hardware zoning Hardware zoning is based on
physical ports. The members of a zone are physical
ports on the fabric switch. It can be implemented in
the following configurations: one to one, one to
many, and many to many.
HBA See host bus adapter.
Host Any system that has at least one Internet
address associated with it. A host with multiple
network interfaces can have multiple Internet
addresses associated with it. This is also referred to
as a server.
Host bus adapter A Fibre Channel HBA
connection that allows a workstation to attach to the
SAN network. The function of an HBA is to convert
the parallel electrical signals from the host bus into a
serial signal to pass to the SAN.
Hub A Fibre Channel device that connects up to
126 nodes into a logical loop. All connected nodes
share the bandwidth of this one logical loop. Hubs
automatically recognize an active node and insert
the node into the loop. A node that fails or is powered
off is automatically removed from the loop.
I
- a generic Fibre