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Departmental Switch Model DS-16B2 Fabric OS Procedures Manual
Glossary
CRC Cyclic Redundancy Check; a check for transmission errors included
in every data frame.
Credit As applies to Fibre Channel, the number of receive buffers available
for transmission of frames between ports. See also BB_Credit and
EE_Credit.
Cut through A switching technique that allows the route for a frame to be selected
as soon as the destination address is received. See also Route.
D
Data Word Type of transmission word that occurs within frames. The frame
header, data field, and CRC all consist of data words. See also Frame,
Ordered set, and Transmission Word.
Defined Zone
Configuration
The set of all zone objects defined in the fabric. May include multiple
zone configurations. See also Enabled Configuration and Zone
Configuration.
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 Departmental 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
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
and 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.