NonStop S-Series System Expansion and Reduction Guide

Table Of Contents
Glossary
G-Series Common Glossary
Glossary-91
ServerNet II
ServerNet II. The second-generation ServerNet network. ServerNet II architecture is
backward-compatible with ServerNet I architecture, and it features 125 (or 50)
megabytes/second speed, 12-port ServerNet routers, 8b/9b and 8b/10b (serializer
ready) encoding, and a 512-byte maximum packet size. See also ServerNet I
.
ServerNet adapter. A component that connects peripheral devices to the rest of the system
through a ServerNet bus interface (SBI). A ServerNet adapter is similar in function to
an I/O controller logic board (LB) and backplane interconnect card (BIC) in HP
NonStop™ K-series servers.
ServerNet address. A virtual memory address that, when translated to a physical address,
indicates where the memory access needed by a ServerNet transaction begins. In
some cases, the translation can point to some entity other than memory, such as a
register. The ServerNet address is included in all ServerNet read request and write
request packets.
ServerNet addressable controller (SAC). An I/O controller that is uniquely addressable by
a ServerNet ID in the ServerNet fabrics. A SAC is typically implemented on some
portion of a processor multifunction (PMF) customer-replaceable unit (CRU), an I/O
multifunction (IOMF) CRU, or a ServerNet adapter.
ServerNet buffer board (SBB). The board that provides the ServerNet connection to and
from the I/O multifunction (IOMF) customer-replaceable unit (CRU). This board
replaces the processor and memory board (PMB) in the IOMF CRU.
ServerNet bus interface (SBI). The I/O control and expansion packetizer application-
specific integrated circuit (ASIC).
ServerNet cable. A cable that provides ServerNet links between system enclosures.
ServerNet cluster. A network of servers (nodes) connected together using the ServerNet
protocol for interprocessor communication across a cluster and within its nodes. A
ServerNet cluster offers linear system expansion beyond the 8-processor or
16-processor limits of a single server, achieving comparable speeds for internal and
external ServerNet communication. See also cluster
and HP NonStop™ ServerNet
Cluster (ServerNet Cluster).
ServerNet Cluster. See HP NonStop™ ServerNet Cluster (ServerNet Cluster).
ServerNet cluster monitor process (SNETMON). A process pair with the process name
$ZZSCL that manages the state of the ServerNet cluster subsystem. Each node
(system) in a ServerNet cluster must have one SNETMON process pair running.
ServerNet cluster services. The functions necessary to allow a node to join, participate in,
or leave an HP NonStop™ ServerNet Cluster. These functions include monitoring and
control of the physical connections to the cluster, discovery of other nodes in the
cluster, and automatic recovery of failed connections.