Fibre Channel SAN Switch 2/16 Installation Guide
Glossary–3
Glossary
Circuit
An established communication path between two ports. Consists of two virtual circuits
capable of transmitting in opposite directions. See also Link.
Command Line
Interface that depends entirely on the use of commands, such as through telnet or SNMP, and
does not involve a GUI.
Community (SNMP)
A relationship between a group of SNMP managers and an SNMP agent, in which
authentication, access control, and proxy characteristics are defined. See also SNMP.
Connection Initiator
A port that has originated a Class 1 dedicated connection and received a response from the
recipient.
Connection Recipient
A port that has received a Class 1 dedicated connection request and transmitted a response to
the originator.
CRC
Cyclic Redundancy Check; a check for transmission errors included in every data frame.
Credit
As applies to Fibre Channel, the number of receive buffers available for transmission of
frames between ports. See also BB_Credit, EE_Credit.
Disparity
The relationship of ones and zeros in an encoded character. “Neutral disparity” means an
equal number of each, “positive disparity” means a majority of ones, and “negative disparity”
means a majority of zeros.
DLS
Dynamic Load Sharing; dynamic distribution of traffic over available paths. Allows for
recomputing of routes when an Fx_Port or E_Port changes status.
Domain ID
As applies to SAN switches, a unique number between 1 and 239 that identifies the switch to
the fabric and is used in routing frames. Usually automatically assigned by the switch, but can
be manually assigned.
