Brocade Communications Systems A7990A - StorageWorks SAN Director 4/16 Blade Switch Manual
Brocade glossary (53-1000040-03, november 2006)
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Also See for A7990A - StorageWorks SAN Director 4/16 Blade Switch:
- Command reference manual (824 pages) ,
- Administrator's manual (406 pages) ,
- Reference (292 pages)
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Summary of Contents for Brocade Communications Systems A7990A - StorageWorks SAN Director 4/16 Blade Switch
- Page 1 Glossary Supporting Fabric OS v5.2.0 Publication Number: 53-1000040-03 Publication Date: 9/29/2006...
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Page 2: All Rights Reserved
Copyright © 2006, Brocade Communications Systems, Incorporated. ALL RIGHTS RESERVED. Brocade, the Brocade B weave logo, Fabric OS, File Lifecycle Manager, MyView, Secure Fabric OS, SilkWorm, and StorageX are registered trademarks and Tapestry is a trademark of Brocade Communications Systems, Inc., in the United States and/or in other countries. -
Page 3: Document History
Document History The following table lists all versions of the Brocade Glossary. Document Title Publication Summary of Changes Publication Number Date Brocade Glossary v3.1 / 4.1 53-0000369-01 New document. April 2003 Brocade Glossary v4.1.2 53-0000369-02 ® October 2003 terms. Added FICON Brocade Glossary v5.1.0 53-1000040-01 Added Fibre Channel Routing... - Page 5 Glossary Accept link service reply. The normal reply to an Extended Link Service request (such as FLOGI), indicating that the request has been completed. (Access Control List) active copper A Fibre Channel connection that allows copper cabling up to 33 meters (36 yards) between devices. A special administrative domain.
- Page 6 Glossary AL_PA Arbitrated-loop physical address. A unique 8-bit value assigned during loop initialization to a port in an arbitrated loop. AL_TIME Arbitrated-loop timeout value. Twice the amount of time it would take for a transmission word to propagate around a worst-case loop. The default value is 15 milliseconds (ms). alias A logical grouping of elements in a fabric.
- Page 7 Glossary autocommit A feature of the firmwareDownload command. Enabled by default, autocommit commits new firmware to both the primary and secondary partitions of a CP. With autocommit disabled, the firmware is written only to the primary partition of a CP, enabling you to restore the previous firmware from the secondary partition.
- Page 8 Glossary Bit error rate. The rate at which bits are expected to be received in error. Expressed as the ratio of error bits to total bits transmitted. See also error. BISR Built-in self-repair. BIST Built-in self-test. The condition in which a receiver is delivering retimed serial data at the required bit error rate. synchroniza- tion blind-mate...
- Page 9 Glossary CHAP Challenge-Handshake Authentication Protocol. Allows remote servers and clients to securely exchange authentication credentials. Both the server and client are configured with the same shared secret. chassis On a SilkWorm director, the metal frame in which the switch and switch components are mounted. chassisConfig Chassis configuration mode.
- Page 10 Glossary compact flash Volatile flash memory used in a manner similar to hard disk storage. It is connected to a bridging component that connects to the PCI bus of the processor. Not visible in the processor's memory space. Condor A Brocade 4-Gbit/sec switch and director ASIC. controlled port A port that fulfils one of the following conditions: a) is a member of an Admin Domain, either explicitly assigned or part of AD0, or b) if the switch to which the port belongs is a member of an Admin Domain.
- Page 11 Glossary data migration (DMC) The graphical user interface to the DMM appliance. See also appliance. console Direct cable connection. DCC does not require network interface cards (NICs), making it relatively inexpensive and simple; however, it provides a limited connection between two PCs, and the data transfer rate is slower than with a true LAN.
- Page 12 Glossary Dynamic load-sharing or dynamic distribution of traffic over available paths. Allows for recomputing of routes when an Fx_Port or E_Port changes status. The device-based and exchange-based routing policies depend on the Fabric OS Dynamic Load Sharing feature (DLS) for dynamic routing path selection.
- Page 13 Glossary Extended link service. ELSs are sent to the destination N_Port to perform the requested function or service. ELS is a Fibre Channel standard that is sometimes referred to as “Fibre Channel Physical (FC_PH) ELS.” Environmental monitor. A daemon in the Fabric OS that monitors hardware components and FRUs and reports failures.
- Page 14 Glossary extended edge This format generates the same PID for a port on switches with 16 or fewer ports as would native PID format, but it also supports up to 256 ports per domain. It should be used only in cases where you cannot upgrade devices to dynamic PID binding and you must not reboot your servers.
- Page 15 Glossary fan-in The ratio of hosts to storage devices; the view of the SAN from the storage port's perspective. fan-out The ratio of storage devices to hosts; the view of the SAN from the host port's perspective. FastWrite A Fabric OS feature running on top of FCIP that accelerates Write operations from a host to a target device.
- Page 16 Glossary FDDI Fibre Distributed Data Interface. An ANSI architecture for a metropolitan area network (MAN); a network based on the use of fiber-optic cable to transmit data at 100 Mbit/sec. FDMI Fabric-Device Management Interface. FDMI is a database service provided by the fabric for Nx_Ports. The primary use is by HBA devices that register information about themselves and their ports.
- Page 17 Glossary flash Programmable nonvolatile RAM (NVRAM) memory that maintains its contents without power. FLOGI Fabric login. The process by which an N_Port determines whether a fabric is present, and if so, exchanges service parameters with it. See also PLOGI. FR4-18i An application processor blade with 16 x 4Gbit/sec FC ports and 2 x 1Gbit/sec Ethernet ports.This blade supports FCIP and Fibre Channel Routing Services and is available for the SilkWorm 48000 director in chassisConfig mode 5.
- Page 18 Glossary G_Port Generic port. A port that can operate as either an E_Port or an F_Port. A port is defined as a G_Port when it is not yet connected or has not yet assumed a specific function in the fabric. gateway Gateway hardware merges SANs into a single fabric by establishing point-to-point E_Port connectivity between two Fibre Channel switches separated by a network with a protocol such as IP or SONET.
- Page 19 Glossary header A Fibre Channel frame has a header and a payload. The header contains control and addressing information associated with the frame. See also payload. HiPPI High-Performance Parallel Interface. An 800 Mbit/sec interface normally used in supercomputer environments. hop count The number of ISLs a frame must traverse to get from its source to its destination.
- Page 20 Glossary implicit list In administrative domains, a list of all switches, ports, and devices that have not been explicitly declared in any AD (including AD0). The implicit list changes as other ADs are created and resources consumed by them. See also AD0, automatic member, and explicit...
- Page 21 Glossary iSCSI Internet SCSI (Small Computer System Interface), an Internet Protocol (IP)-based storage networking standard. By carrying SCSI commands over IP networks, iSCSI is used to facilitate data transfers over intranets and to manage storage over long distances. iSCSI PDU Protocol Data Unit.
- Page 22 Glossary LIFA Loop-initialization fabric-assigned frame. Contains a bitmap of all fabric-assigned AL_PAs and is the first frame transmitted in the loop initialization process after a temporary loop master has been selected. LIHA Loop-initialization hard-assigned frame. A hard-assigned AL_PA that is indicated by a bit set and is the third frame transmitted in the loop initialization process after a temporary loop master has been selected.
- Page 23 Glossary loop failure Loss of signal within a loop for any period of time, or loss of synchronization for longer than the timeout value. Loop_ID A hexadecimal value representing one of the 127 possible AL_PA values in an arbitrated loop. loop The logical procedure used by an L_Port to discover its environment.
- Page 24 Glossary Long wavelength. A type of fiber optic cabling that is based on 1310-mm lasers and supports link speeds of 1.0625, 2.125, and/or 4.25 Gbit/sec. Can also refer to the type of GBIC or SFP. See also SWL. MALLOC Memory allocation. Usually relates to buffer credits. Metropolitan area network.
- Page 25 Glossary MSRS Multiprotocol SAN Routing Services. An optionally licensed software bundle available on certain Brocade platforms, such as the SilkWorm Fabric AP7420, that includes the Fibre Channel Routing Service, the iSCSI Gateway Service, and the FCIP Tunneling Service. MTBF Mean time between failures. An expression of time, indicating the longevity of a device. multicast The transmission of data from a single source to multiple specified N_Ports (as opposed to all the ports on the network).
- Page 26 Glossary Not operational. The NOS primitive sequence is transmitted to indicate that the FC_Port transmitting the NOS has detected a link failure or is offline, waiting for the offline sequence (OLS) to be received. NPIV N_Port ID virtualization. Allows a single Fibre Channel port to appear as multiple, distinct ports providing separate port identification and security zoning within the fabric for each operating system image as if each operating system image had its own unique physical port.
- Page 27 Glossary OX_ID Originator ID or exchange ID. Refers to the exchange ID assigned by the originator port. packet A set of information transmitted across a network. See also frame. Programmable Array Logic. A relatively small FPD. parallel The simultaneous transmission of data bits over multiple lines. Participating A mode in which an L_Port in a loop has a valid AL_PA and can arbitrate, send frames, and retransmit mode...
- Page 28 Glossary Public key infrastructure. An infrastructure that is based on public key cryptography and CA (certificate authority) and that uses digital certificates. See also digital certificate public key cryptography. Public key infrastructure certification utility. A utility that makes it possible to collect certificate certification requests from switches and to load certificates to switches.
- Page 29 Glossary Ports on A licensed feature available on certain switches, such as the SilkWorm 200E. These switches are Demand shipped with some but not all of the physical ports on the switch activated. A POD license is used to activate the remaining ports on the switch. Usually more than one POD license is required to enable all the ports on the switch.
- Page 30 Glossary proxy device A virtual device present in a local fabric that represents a physical device connected to a different edge fabric. From the perspective of a local device that is physically connected to a fabric, a proxy device is said to be imported;...
- Page 31 Glossary R_T_TOV Receiver transmitter timeout value, used by receiver logic to detect loss of synchronization between transmitters and receivers. radius The greatest "distance" between any edge switch and the center of a fabric. A low-radius network is better than a high-radius network. RAID Redundant array of independent disks.
- Page 32 Glossary router Fibre Channel Routing Services. routing The assignment of frames to specific switch ports, according to frame destination. RR_TOV Resource recovery timeout value. The minimum time a target device in a loop waits after an LIP before logging out an SCSI initiator. See also E_D_TOV and R_A_TOV.
- Page 33 Glossary SC connector. An SC connector is a fiber-optic cable connector that uses a push-pull latching mechanism similar to common audio and video cables. For bidirectional transmissions, two fiber cables and two SC connectors (dual SC) are generally used. State change notification. Used for internal state change notifications, not external changes. This is the switch logging that the port is online or is an Fx_Port, not what is sent from the switch to the Nx_Ports.
- Page 34 Glossary Single mode The fiber-optic cabling standard for devices up to 10 km apart. S-Link Service Facilities used between an N_Port and the fabric, or between two N_Ports, for login, sequence/ exchange management, and maintaining connections. SLAP Switch Link Authentication Protocol. Service Location Protocol.
- Page 35 Glossary static route A static route is a route that is assigned to a specific path (using the uRouteConfig command), and will not change when a topology change occurs, unless the path used by the route becomes unavailable. A static route can be assigned only when the active routing policy is port-based. When device-based or exchange-based routing is active, you cannot assign static routes.
- Page 36 Glossary tenancy The time from when a port wins arbitration in a loop until the same port returns to the monitoring state. Also referred to as “loop tenancy.” throughput The rate of data flow achieved within a cable, link, or system. Usually measured in bps (bits per second or b/sec).
- Page 37 Glossary Transmit. See also RX. Typical zoning In EZSwitchSetup, an option that provides predefined zoning on the switch and supports single-switch fabrics only (appropriate for less experienced SAN administrators). See also Advanced zoning Custom zoning. U_Port Universal port. A switch port that can operate as a G_Port, E_Port, F_Port, or FL_Port. A port is defined as a U_Port when it is not connected or has not yet assumed a specific function in the fabric.
- Page 38 Glossary Wide area network. WAN_TOV Wide area network timeout value. well-known In Fibre Channel technology, a logical address defined by Fibre Channel standards as assigned to a address specific function and stored on the switch. workstation A computer used to access and manage the fabric. Also referred to as a “management station” or “host.” Write timeout value.