Q-Logic FC0054607-00 A manual Point-to-point, Port instance, Port login

Fibre Channel and Converged Network Adapters for VMware ESX/ESXi 4.0 User’s Guide

This is important to the driver when selecting the proper method of failover notification. It can make a difference to the target device, which might have to take different actions when receiving retries of the request from another initiator or on a different port.

PLOGI

Port login. A port login occurs in a Fibre Channel SAN when two node ports estab- lish a connection between each other (typically a device such as a Fibre Channel Adapter connecting to a switch).

point-to-point

Also FC-P2P. Two Fibre Channel nodes directly connected (not in a loop).

port

Access points in a device where a link attaches. The most common port types are:

„N_Port—a Fibre Channel port that supports point-to-point topology.

„NL_Port—a Fibre Channel port that supports loop topology.

„F_Port—a port in a fabric where an N_Port can attach.

„FL_Port—a port in a fabric where an NL_Port can attach.

port instance

The number of the port in the system. Each adapter may have one or multiple ports, identified with regard to the adapter as port 0, port 1 and so forth. to avoid confusion when dealing with a system containing numerous ports, each port is assigned a port instance number when the system boots up. So Port 0 on an adapter might have a port instance number of, for example, 8 if it is the eighth port discov- ered by the system.

port login

See PLOGI.

reduced instruction set computer

See RISC.

registered state change notification

See RSCN.

RISC

Reduced instruction set computer. A computer microprocessor that performs fewer types of computer instructions, thereby operating at higher speeds.

RSCN

Registered state change notification (RSCN) is a Fibre Channel fabric notifica- tion sent to all specified nodes when any major fabric changes occur. This notifica- tion allows nodes to immediately gain knowledge about the fabric and react accordingly.

SAN

Storage area network. Multiple storage units (disk drives) and servers connected by networking topology.

SCSI

Small computer system interface. A high-speed interface used to connect devices—such as hard drives, CD drives, printers, and scanners— to a computer. The SCSI can connect many devices using a single controller. Each device is accessed by an individual identification number on the SCSI controller bus.

small computer system interface

See SCSI.

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