HP Surestore 6164 Zoning User's Guide (Version 3.0) - Page 34

BER 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. Block As applies to Fibre Channel, upper-level application data that is transferred in a single sequence. Broadcast The transmission of data from a single source to all devices in the fabric, regardless of zoning. See also Multicast, Unicast. Buffer-to-buffer Management of the frame transmission rate in either a point-to-point topology or Flow Control in an arbitrated loop. See also BB_Credit. Cascade Chassis Two or more interconnected Fibre Channel switches. For HP switches, a maximum of seven hops is recommended (no path longer than eight switches). See also Fabric, ISL. The metal frame in which the switch and switch components are mounted. Circuit Class 1 Class 2 Class 3 Class F Class of Service An established communication path between two ports. Consists of two virtual circuits capable of transmitting in opposite directions. See also Link. Service that provides a dedicated connection between two ports (also called connection-oriented service), with notification of delivery or nondelivery. Service that provides multiplex and connectionless frame switching service between two ports, with notification of delivery or nondelivery. Service that provides a connectionless frame switching service between two ports, without notification of delivery or nondelivery of data. Can also be used to provide a multicast connection between the originator and recipients, with notification of delivery or nondelivery. Connectionless service for control traffic between switches, with notification of delivery or nondelivery of data between the E_Ports. A specified set of delivery characteristics and attributes for frame delivery. Comma A unique pattern (either 1100000 or 0011111) used in 8B/10B encoding to specify character alignment within a data stream. See also K28.5. Community (SNMP) A relationship between a group of SNMP managers and an SNMP agent, in which authentication, access control, and proxy characteristics are defined. See also SNMP. CRC Cyclic Redundancy Check; a check for transmission errors included in every data frame. Credit As applies to Fibre Channel, the number of receive buffers available for transmission of frames between ports. See also BB_Credit, EE_Credit. Cut-through A switching technique that allows the route for a frame to be selected as soon as the destination address is received. See also Route. Data Word Type of transmission word that occurs within frames. The frame header, data field, and CRC all consist of data words. See also Frame, Ordered set, Transmission Word. Defined Zone The set of all zone objects defined in the fabric. May include multiple zone Configuration configurations. See also Enabled Configuration, Zone Configuration. Glossary-2 Zoning User's Guide