ANSI INCITS-324-1999 pdf download High-Performance Parallel Interface – 6400 Mbit/s Physical Switch Control (HIPPI-6400-SC)
3 Definitions and conventions
3.1 Definitions For the purposes of this standard, the following definitions apply.
3.1.1 Admin Element address: A 32-bit field uniquely identifying an Element.
3.1.2 Admin micropacket: A HIPPI-6400 micro- packet used for configuration and management.
3.1.3 administrator: A station management entity providing external management control.
3.1.4 alternate pathing: Capability to address a Message to select from a group of ports based upon defined criteria.
3.1.5 broadcast: The capability for a Source to send one Message that arrives at multiple Destina- tions.
3.1.6 Destination: The receiving end of a physical link.
3.1.7 Device: Any system level component (e.g. endpoint or switch) with a HIPPI-6400 port.
3.1.8 Element: Any component of a HIPPI-6400 system that is able to receive, process, and send Admin micropackets in a manner conforming to this standard.
3.1.9 endpoint: A Final Destination and/or an Orig- inating Source.
3.1.10 fabric: All of the switching equipment and re- sulting pathways connected together in a configuration.
3.1.11 Final Destination: The end device that receives, and operates on, the data payload portion of the micropackets. This is typically a host computer system, but may also be a translator, bridge, or router.
3.1.12 HIPPI-PH: High-Performance Parallel Inter face Mechanical, Electrical, and Signalling Protocol Specification (HIPPI-PH), ANSI X3.183-1991. Data is transmitted in parallel over copper twisted- pair cables at 800 or 1600 Mbits per second.
3.1.13 in-band: Switch control communications ac- complished over a HIPPI-6400 link, as opposed to using an alternative (non-HIPPI-6400) communica- tion channel.
3.1.14 link: A full-duplex connection between HIP- PI-6400-PH Devices. 3.1.15 link-end: A hardware device that terminates one end of a link.
3.1.16 log: The act of making a record of an event for later use. 3.1.17 Message: An ordered sequence of one or more micropackets which have the same VC, Originating Source, and Final Destination. Messages are the basic transfer unit between an Originating Source and a Final Destination. The first micro- packet of a Message is a Header micropacket. The last micropacket, which may also be the first micro- packet, has the TAIL bit set. 3.1.18 micropacket: The basic transfer unit con- sisting of 32 data bytes and 64 bits of control information.
3.1.19 optional: Characteristics that are not re- quired by HIPPI-6400-SC. However, if any optional characteristic is implemented, it shall be implemented as defined in HIPPI-6400-SC.
3.1.20 Originating Source: The end device that generates the data payload portion of the micropackets. This is typically a host computer system, but may also be a translator, bridge, or router.
3.1.21 Source: The sending end of a physical link.
3.1.22 switch: An equipment that provides connections between HIPPI-6400 links based on this standard.
3.1.23 Universal LAN MAC Address (ULA): A log- ical address stored in a Source or Destination field that uniquely identifies an Originating Source or Final Destination. The ULA conforms to the 48-bit MAC address specified by the IEEE 802 Overview Standard.