director 2/64 installation guide

Glossary–16 director 2/64 installation guide
Glossary
segmented E_Port
E_Port that has ceased to function as an E_Port within a multi-switch fabric due to an
incompatibility between the fabrics that it joins.
See also expansion port.
SEL
System error light.
serial crossbar assembly
The serial crossbar assembly (SBAR) is responsible for Fibre Channel frame transmission
from any director port to any other director port. Connections are established without software
intervention.
SNMP
Simple network management protocol. Specifies a mechanism for network management that is
complete, yet simple. Information is exchanged between agents, which are the devices on the
network being managed, and managers, which are the devices on the network through which
the management is done.
SNMP community
Also known as SNMP community string. SNMP community is a cluster of managed products
(in SNMP terminology, hosts) to which the server or managed product running the SNMP
agent belongs.
SNMP community name
The name assigned to a given SNMP community. Queries from an SNMP management station
to a device running an SNMP agent will only elicit a response if those queries are addressed
with the correct SNMP community name.
SSP
See system services processor.
storage area network
A high-performance data communications environment that interconnects computing and
storage resources so that the resources can be effectively shared and consolidated.
subnet mask
Used by a computer to determine whether another computer with which it needs to
communicate is located on a local or remote network. The network mask depends upon the
class of networks to which the computer is connecting. The mask indicates which digits to
look at in a longer network address and allows the router to avoid handling the entire address.
switchover
Changing a backup FRU to the Active state, and the active FRU to the Backup state.