NonStop S-Series Hardware Installation and FastPath Guide (G06.25+)

Glossary
HP NonStop S-Series Hardware Installation and FastPath Guide—529443-001
Glossary-99
ServerNet router 2
ServerNet router 2. A model of ServerNet router that has a total of twelve input and twelve
output ports. See also ServerNet router 1.
ServerNet subdevice. An I/O device that sends and receives its information through a
controlling device that acts as the ServerNet device for routing purposes.
ServerNet subdevice ID. The low-order (least significant) bits of a ServerNet ID, used by a
ServerNet device to distribute incoming and outgoing information between itself and its
associated subdevices.
ServerNet switch. A point-to-point networking device that connects ServerNet nodes to a
single fabric (X or Y) of the ServerNet communications network. The ServerNet switch
routes ServerNet packets among these nodes.
ServerNet II Switch. A 12-port network switch that provides the physical junction point to
enable an HP NonStop™ server to connect to a ServerNet cluster. The ServerNet II
Switch is a component of the HP NonStop™ Cluster Switch (model 6770).
ServerNet switch board. Component in an IOAM. The ServerNet switch board provides
ServerNet connections to the I/O adapters in the IOAM. It also provides maintenance
functions for the modules in which they are installed.
ServerNet transaction. The bidirectional, successful transmission of a pair of ServerNet
packets between two ServerNet devices. The device that originates the transaction
sends a request packet, and the device that receives the request returns a response
packet. See also request packet and response packet.
ServerNet wide area network (SWAN) concentrator. (1) An HP data communications
peripheral that provides connectivity to an HP NonStop™ server. The SWAN
concentrator supports both synchronous and asynchronous data over RS-232,
RS-449, X.21, and V.35 electrical and physical interfaces. (2) A collective term for both
SWAN concentrators and SWAN 2 concentrators when a distinction between the two is
not required.
ServerNet wide area network (SWAN) 2 concentrator. An HP data communications
peripheral that provides connectivity to an HP NonStop™ server. The SWAN 2
concentrator supports both synchronous and asynchronous data over RS-232,
RS-449, X.21, and V.35 electrical and physical interfaces. The SWAN 2 concentrator is
the next-generation SWAN concentrator and has 12 WAN ports.
service connection. A connection between the Compaq TSM client software running on a
system console and the TSM server software running on an HP NonStop™ S-series
server. A service connection can be used to communicate with the server only when
the HP NonStop™ operating system is running. A service connection provides a
comprehensive service and maintenance picture of the server and is used to perform
most service management tasks. See also low-level link.