Qlogic QLA2 Series, User Manual

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SN0054614-00 K Glossary-3
SANsurfer FC/CNA HBA CLI User’s Guide
Command Line Interface for QLogic FC and FCoE Adapters
DCB
Data center bridging. Provides enhance-
ments to existing 802.1 bridge specifica-
tions to satisfy the requirements of
protocols and applications in the data
center. Because existing high-perfor-
mance data centers typically comprise
multiple application-specific networks that
run on different link layer technologies
(Fibre Channel for storage, InfiniBand for
high-performance computing, and
Ethernet for network management and
LAN connectivity), DCB will enable 802.1
bridges to be used for the deployment of a
converged network where all applications
can be run over a single physical infra-
structure.
DCBX
Data center bridging exchange protocol.
Used by DCB devices to exchange config-
uration information with directly connected
peers. The protocol may also be used for
misconfiguration detection and for configu-
ration of the peer.
device
A target, typically a disk drive. Hardware
such as a disk drive, tape drive, printer, or
keyboard that is installed in or connected
to a system. In FC, a
target device.
driver
The software that interfaces between the
file system and a physical data storage
device or network media.
E_Port
Expansion port. A port in an FC switch that
connects to another FC switch or bridge
device by an inter-switch link (
ISL ).
E_Ports are used to link FC switches to
form a multi-switch fabric.
echo diagnostic test
Transmits a received signal back to the
sender to verify the integrity of the device.
Enhanced Ethernet
Also called data center Ethernet or
converged enhanced Ethernet ) refers to
new enhancements to the existing
Ethernet standard that eliminate Ethernet’s
inherently lossy nature and make 10Gb
Ethernet a viable storage networking
transport.
enhanced transmission selection
See ETS .
Ethernet
The most widely used LAN technology that
transmits information between computers,
typically at speeds of 10 and 100 million
bits per second (Mbps).
ETS
Enhanced transmission selection (ETS)
provides a common management frame-
work for assignment of bandwidth to
802.1p CoS-based traffic classes.
expansion port
See E_Port .
F_Port
Fabric port. The “fabric” port in a FC fabric
switch provides a point-to-point link attach-
ment to a single N_Port. F_Ports are inter-
mediate ports in virtual point-to-point links
between end ports, for example N_Port to
F_Port to F_Port to N_Port using a single
FC fabric switch.
fabric
A fabric consists of cross-connected FC
devices and switches.