HP StorageWorks 4/16 Brocade SAN Glossary for Fabric OS v6.0.0 - Page 19

NL_Port Node Loop port. A port supporting the Arbitrated Loop protocol. Node A Fibre Channel device that supports one or more ports. Node count The number of nodes attached to the fabric. Node name A 64-bit unique identifier assigned to a Fibre Channel node. Non-OFC A category of laser transceiver that does not require open fiber control due to its low intensity. Nonparticipating mode Mode that is entered if there are more than 127 devices on a loop, and an AL_PA cannot be acquired. NOS Non-Operational Primitive Sequence. Used during link initialization between two N_Ports in the point-to-point topology, or an N_Port and F_Port in the fabric topology. It is sent to indicate that the transmitting port has detected a link failure or is offline. An OLS is the expected response. NPIV N_Port ID Virtualization. Allows a single FC_Port to appear as multiple, distinct ports providing separate port identification and security zoning with the fabric for each operating system image as if each one had its own physical port. NR_Port A port used as a source and destination address for frames traversing a backbone fabric. A normal E_Port (not an EX_Port) is used to connect a Multiprotocol Router to a backbone. An NR_Port appears to the rest of the backbone as a standard N_Port connected to the Multiprotocol Router domain. NSCAM Name Server Cache Manager. Updates the NS databases across switches as a background task. Nx_Port Node port that can operate as either an N_Port or NL_Port. O OFC OLS OLTP OPN Ordered set Originator Open Fiber Control. A method used to enable and disable laser signaling for higher-intensity laser transceivers. Offline Primitive Sequence. Used during link initialization between two N_Ports in a point-to-point topology or an F_Port and an N_Port in a fabric. It is sent to indicate that the transmitting port is attempting to initialize a link, has recognized the NOS primitive sequence, or is going offline. The expected response to an OLS is an LR. Online Transaction Processing. Open Primitive Signal. Applies only to Arbitrated Loop, and is sent by an L_Port that has won the arbitration process to open communication with one or more ports on the loop. A set of 4 characters beginning with a special character used to manage frame transport, initialization, and media access, and to distinguish Fibre Channel control information from data. The Nx_Port that originated an exchange. Brocade SAN Glossary 1/29/2008 Page 19 of 29