HP StorageWorks 2/16V Brocade Glossary (53-1000040-03, November 2006) - 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. See also FCIP Tunneling Service and Fibre Channel Routing Services. fractional The partial use of a link to send data back and forth, with a maximum of 254 Class 4 connections per bandwidth N_Port. frame The Fibre Channel structure used to transmit data between ports. Consists of a start-of-frame delimiter, header, optional headers, data payload, cyclic redundancy check (CRC), and end-of-frame delimiter. There are two types of frames: link control frames (transmission acknowledgements and so forth) and data frames. frame relay A protocol that uses logical channels, as used in X.25. Provides very little error-checking ability. Discards frames that arrive with errors. Allows a certain level of bandwidth between two locations (known as a "committed information rate" or CIR) to be guaranteed by service provider. If CIR is exceeded for short periods (known as "bursts"), the network accommodates the extra data, if spare capacity is available. Frame relay is therefore known as "bandwidth on demand." front domain A tier of virtual domains between the translation domains and the edge fabrics. This allows FSPF multipathing to work as desired. Current FC Routing Service uses one front domain per EX_Port, although future implementations might limit this to one per edge fabric. No FC-NAT devices are ever "hung off of" front domains: each IFL connection from a router to an edge fabric creates a front domain. FRU Field-replaceable unit, such as a fan assembly or power supply assembly. A component that can be replaced onsite, typically without powering off the switch or disconnecting the switch from the fabric. See also hot swappable. FSPF Fabric shortest path first. The IEEE T11 standard routing protocol for Fibre Channel switch, which was written by Brocade. FSS Fabric OS state synchronization. The FSS service is related to high availability (HA). The primary function of FSS is to deliver state update messages from active components to their peer standby components. FSS determines if fabric elements are synchronized (and thus FSS "compliant"). FTP File Transfer Protocol. full fabric The Brocade software license that allows multiple E_Ports on a switch, making it possible to create multiple ISL links. full fabric A loop device that has an entry in the Simple Name Server. citizenship full duplex A mode of communication that allows the same port to simultaneously transmit and receive frames. See also half duplex. Fx_Port A fabric port that can operate as either an F_Port or an FL_Port. See also F_Port, FL_Port. Brocade Glossary 13 Publication Number: 53-1000040-03