Technical data

Glossary-8
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
ICT Intracircuit test.
ID_ID Insistent domain ID. A parameter of the configure command in the Brocade Fabric OS.
Insistent
Domain ID
Mode
Sets the domain ID of a switch as insistent, so that it remains the same over reboots, power cycles,
failovers, and fabric reconfigurations. This mode is required to support FICON® traffic.
integrated
fabric
The fabric created by a Brocade SilkWorm 6400, consisting of six SilkWorm 2250 switches cabled
together and configured to handle traffic seamlessly as a group.
IOCTL I/O control.
iSCSI Internet Small Computer Systems Interface. A protocol that defines the processes for transferring block
storage applications over TCP/IP networks by encapsulating SCSI commands into TCP and
transporting them over the network via IP.
iSCSI Gateway
Service
The Brocade multiprotocol SAN routing service that maps the FCP protocol to the IP transport. This
service projects iSCSI hosts onto the backbone fabric of a gateway switch.
ISL Interswitch link. A Fibre Channel link from the E_Port of one switch to the E_Port of another. See also
cascade, E_Port.
ISP Internet service provider.
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.
jitter A deviation in timing for a bit stream as it flows through a physical medium.
K
key A string of data (usually a numeric value) shared between two entities and used to control a
cryptographic algorithm. Usually selected from a large pool of possible keys to make unauthorized
identification of the key difficult. See also key pair.
key pair In public key cryptography, a pair of keys consisting of an entity's public and private key. The public
key can be publicized, but the private key must be kept secret.