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BP1028 EqualLogic iSCSI for Fibre Channel Professionals 15
Appendix A Common terminology
The following terms are used throughout this paper:
DCB: Data Center Bridging – a set of enhancements to Ethernet Protocols to prioritize specific
types of traffic in data center environments.
E-port: Expansion-Port. A port on a FC switch that connects to another FC switch fabric.
Fabric: The switching hardware in a FC or iSCSI SAN
F-port: A port on a FC switch that connects to a node or end device.
HBA: Host Bus Adapter
ISL: Inter-Switch Link. Usually one or more links connecting switches. Similar to LAG.
LAG: Link Aggregation Group or a way to aggregate the bandwidth of two or more links and
appear as a single link. Similar to ISL.
LUN: Logical Unit Number – a method for addressing and identifying a unique device presented
by a SCSI target.
NIC: Network Interface Card
N-port: A FC port on a node – usually a host bus adapter or storage device.
Pool: A group of EqualLogic PS Series arrays in which a volume can be created. A Storage Group
can have up to 4 pools.
SAN: Storage Area Network – a network that is usually dedicated to providing connectivity
between storage and hosts.
Slice: The portion of a volume that is located on a single array, even though the volume is
distributed across multiple members.
Spanning Tree Protocol: A protocol that prevents loops in Ethernet networks.
Storage Group: A group of EqualLogic PS Series arrays that can be managed as a single entity.