Fabric OS Reference Manual

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Community (SNMP) Relationship between a group of SNMP managers and an SNMP agent, in
which authentication, access control, and proxy characteristics are defined.
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 Switching technique that allows selection of a transmission route for a frame
as soon as destination address is received. See also Route.
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,
Transmission word.
Defined
configuration
The complete set of all zone objects defined in the fabric; can include multiple
zone configurations. See also Enabled configuration, Zone configuration.
Disparity The relationship of ones and zeros in an encoded character. Neutral disparity
indicates an equal number of each, positive disparity a majority of ones, and
negative disparity a majority of zeros.
Distributed Fabrics The combined user’s guides for Extended Fabrics and Remote Switch. Not
a software product.
DLS Dynamic Load Sharing. Dynamic distribution of traffic over available paths.
Allows for redistribution when an Fx_Port or E_Port comes up or down.
Domain ID Unique identifier for the switch in a fabric. Usually automatically assigned
by the switch, but can also be assigned manually. Can be any value between
1 and 239.
E_D_TOV Error Detect Time-out Value. Time allowed for round-trip transmission
before recovery is initiated. Can also be defined as the minimum time an
L_Port waits for sequence completion before initiating recovery. See also
R_A_TOV.
E_Port Expansion Port. A switch port that has the ability to connect to a similar port
on another switch, allowing creation of an interswitch link. See also ISL.