Hp Brocade 8Gb SAN Switch for HP BladeSystem c-Class User Manual download pdf (Page 60)

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 in to the fabric.

public device A device that supports arbitrated loop protocol, can interpret 8-bit addresses,

and can log in to the fabric. See also arbitrated loop.

public loop An arbitrated loop that includes a participating FL_Port and may contain both

public and private NL_Ports. See also arbitrated loop.

public NL_Port An NL_Port that logs in to the fabric, can function within a public or private loop,

and can communicate with private or public NL_Ports. See also private loop.

quad A group of four adjacent ports that share a common pool of frame buffers.

R_A_TOV Resource allocation time-out value. The maximum time a frame can be delayed

in the fabric and still be delivered.

RAID Redundant Array of Independent Disks. A collection of disk drives that appear

as a single volume to the server and are fault tolerant through mirroring or parity

checking.

request rate The rate at which requests arrive at a servicing entity.

route With respect to a fabric, the communication path between two switches. May

also apply to the specific path taken by an individual frame from source to

destination.

routing The assignment of frames to specific switch ports according to frame destination.

RR_TOV Resource recovery time-out value. The minimum time a target device in a loop

waits after a LIP before logging out a SCSI initiator.

RSCN Registered state change notification. A switch function that allows notification of

fabric changes to be sent from the switch to the specified nodes.

SAN Storage area network. A network of systems and storage devices that

communicate using FC protocols.

SDRAM Synchronous dynamic random access memory. The main memory for a switch.

See also switch.

sequence A group of related frames transmitted in the same direction between two N_ports.

service rate The rate at which an entity can service requests.

single mode The fiber optic cabling standard that corresponds to distances up to 10 km

between devices.

SNMP Simple Network Management Protocol. An Internet management protocol that

uses either IP for network-level functions and UDP for transport functions, or TCP/IP

for both. SNMP can be made available over other protocols (such as UDP/IP)

because it does not rely on the underlying communication protocols. See also

MIB, trap (SNMP).

Glossary60

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Hp Brocade 8Gb SAN Switch for HP BladeSystem c-Class User Manual Page 60