NonStop System Glossary

routers, 8b/9b and 8b/10b (serializer ready) encoding, and a 512-byte maximum packet size.
See also ServerNet I and “ServerNet 3” (page 168).
ServerNet 3
Third-generation interconnect that is backward-compatible with ServerNet I and ServerNet II. Used
in Integrity NonStop NS-series servers, HP Integrity NonStop BladeSystems, and other products, it
features 250 (or 125 or 50) MB/s speed, 32-port routers, 8b/9b and 8b/10b (serializer ready)
encoding, and 512-byte maximum packet size. See also ServerNet I and “ServerNet II” (page 167).
ServerNet II Switch
A 12-port network switch that provides the physical junction point to enable a NonStop server to
connect to a ServerNet cluster. The ServerNet II Switch is a component of the HP NonStop Cluster
Switch (model 6770).
ServerNet adapter
A component that connects peripheral devices to the rest of the system through a ServerNet bus
interface (SBI).
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 Advanced Interface Logic (SAIL)
An application-specific integrated circuit (ASIC) that supports the ServerNet communications
protocol.
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 conducts ServerNet signals.
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).
168