HP StorageWorks 2/8-EL quickloop fabric assist version 3.0.x user guide - Page 61

Disparity, Domain ID, E_D_TOV, E_Port, EE_Credit, EIA Rack, Enabled Zone Configuration - san switch manual

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Glossary Disparity The relationship of ones and zeros in an encoded character. "Neutral disparity" means an equal number of each, "positive disparity" means a majority of ones, and "negative disparity" means a majority of zeros. DLS Dynamic Load Sharing; dynamic distribution of traffic over available paths. Allows for recomputing of routes when an Fx_Port or E_Port changes status. Domain ID As applies to SAN switches, a unique number between 1 and 239 that identifies the switch to the fabric and is used in routing frames. Usually automatically assigned by the switch, but can be manually assigned. E_D_TOV Error Detect Time-out Value; the minimum amount of time a target waits for a sequence to complete before initiating recovery. Can also be defined as the maximum time allowed for a round-trip transmission before an error condition is declared. See also R_A_TOV, RR_TOV. E_Port Expansion Port; a type of switch port that can be connected to an E_Port on another switch to create an ISL. See also ISL. EE_Credit End-to-end Credit; the number of receive buffers allocated by a recipient port to an originating port. Used by Class 1 and 2 services to manage the exchange of frames across the fabric between source and destination. See also End-to-end Flow Control, BB_Credit. EIA Rack A storage rack that meets the standards set by the Electronics Industry Association. Enabled Zone Configuration The currently enabled configuration of zones. Only one configuration can be enabled at a time. See also Defined Configuration, Zone Configuration. End-to-end Flow Control Governs flow of class 1 and 2 frames between N_Ports. See also EE_Credit. Error As applies to Fibre Channel, a missing or corrupted frame, time-out, loss of synchronization, or loss of signal (link errors). See also Loop Failure. Exchange The highest level Fibre Channel mechanism used for communication between N_Ports. Composed of one or more related sequences, and can work in either one or both directions. Quickloop Fabric Assist User Guide 61

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Glossary
61
Quickloop Fabric Assist User Guide
Disparity
The relationship of ones and zeros in an encoded character. “Neutral disparity” means an
equal number of each, “positive disparity” means a majority of ones, and “negative
disparity” means a majority of zeros.
DLS
Dynamic Load Sharing; dynamic distribution of traffic over available paths. Allows for
recomputing of routes when an Fx_Port or E_Port changes status.
Domain ID
As applies to SAN switches, a unique number between 1 and 239 that identifies the switch
to the fabric and is used in routing frames. Usually automatically assigned by the switch,
but can be manually assigned.
E_D_TOV
Error Detect Time-out Value; the minimum amount of time a target waits for a sequence to
complete before initiating recovery. Can also be defined as the maximum time allowed for
a round-trip transmission before an error condition is declared. See also
R_A_TOV
,
RR_TOV
.
E_Port
Expansion Port; a type of switch port that can be connected to an E_Port on another switch
to create an ISL. See also
ISL
.
EE_Credit
End-to-end Credit; the number of receive buffers allocated by a recipient port to an
originating port. Used by Class 1 and 2 services to manage the exchange of frames across
the fabric between source and destination. See also
End-to-end Flow Control
,
BB_Credit
.
EIA Rack
A storage rack that meets the standards set by the Electronics Industry Association.
Enabled Zone Configuration
The currently enabled configuration of zones. Only one configuration can be enabled at a
time. See also
Defined Configuration
,
Zone Configuration
.
End-to-end Flow Control
Governs flow of class 1 and 2 frames between N_Ports. See also
EE_Credit
.
Error
As applies to Fibre Channel, a missing or corrupted frame, time-out, loss of
synchronization, or loss of signal (link errors). See also
Loop Failure
.
Exchange
The highest level Fibre Channel mechanism used for communication between N_Ports.
Composed of one or more related sequences, and can work in either one or both directions.