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Appendix A Glossary
Alias Server: A Fabric software facility that supports multicast group management.
Arbitrated Loop: The FC Arbitrated Loop (FC-AL) is a standard defined on top of the
FC-PH standard. It defines the arbitration on a loop where several FC nodes share a
common medium.
Community (SNMP): An SNMP community is a relationship between an SNMP agent and a
set of SNMP managers that defines authentication, access control, and proxy
characteristics.
Credit: Credit, applied to a switch, is a numeric value that represents the maximum number of
receive buffers provided by an F_Port or FL_Port to its attached N_Port or NL_Port
respectively such that the N_Port or NL_Port may transmit frames without over-running
the F_Port or NL_Port.
Class 2: In Class-2 service, the Fabric and destination N_Port provide connectionless service
with notification of delivery or nondelivery between the two N_Ports.
Class 3: Class-3 service provides a connectionless service without notification of delivery
between N_Ports. The transmission and routing of Class-3 frames is the same as for
Class-2 frames.
Domain_ID: The domain number uniquely identifies the switch in a Fabric. This switch
domain ID is normally automatically assigned by the switch and may be any value
between 0 and 31. This number may also be assigned manually.
E_Port: A port used as an interswitch expansion port to connect to the E_Port of another
switch to build a larger switch Fabric.
Error Detect Time Out Value (E_D_TOV): E_D_TOV defines the time the switch waits for
an expected response before declaring an error condition. The E_D_TOV is adjustable in
1ms increments from two seconds up to ten seconds.
Fabric: The name applied to a network resulting from the interconnection of switches and
devices comprised of high-speed fiber connections. A Fabric is an active, intelligent,
nonshared interconnect scheme for nodes.
FL_Port: The Fabric access port used to connect NL_Ports to the switch in a loop
configuration.
F_Port: The Fabric access port used to connect an N_Port.
FSPF: Fibre-Channel shortest path first.