Glossary
Hub A Fibre Channel wiring concentrator that collapses a loop topology into a physical star topology. Nodes are automatically added to the loop when active and removed when inactive.
I
Idle Continuous transmission of an ordered set over a Fibre Channel link when no data is being transmitted, to keep the link active and maintain bit, byte, and word synchronization.
Initiator A server or workstation on a Fibre Channel network that initiates
communications with storage devices. See also Target.
IOD In order Delivery; a parameter that, when set, guarantees that frames are either delivered in order or dropped.
ISL Interswitch Link; a Fibre Channel link from the E_Port of one switch to the E_Port of another. See also E_Port and Cascade.
ISL Trunking A Brocade feature that enables distribution of traffic over the combined bandwidth of up to four ISLs (between adjacent switches), while preserving in order delivery. A set of trunked ISLs is called a trunking group; each port employed in a trunking group is called a trunking port. See also Master Port.
Isolated An E_Port that is online but not operational due to overlapping
E_Port domain IDs or nonidentical parameters (such as E_D_TOVs). See also E_Port.
IU Information Unit; a set of information as defined by either upper level process protocol definition or upper level protocol mapping.
J
JBOD Just a Bunch Of Disks; indicates a number of disks connected in a
single chassis to one or more controllers. See also RAID.
K
K28.5 A special 10 bit character used to indicate the beginning of a transmission word that performs Fibre Channel control and signaling functions. The first seven bits of the character are the comma pattern. See also Comma.
Departmental Switch Model
