HP StorageWorks 2/32 - SAN Switch Installation Manual page 85

Glossary
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.
E_D_TOV
Error Detect Time-out Value; the minimum amount of time a target waits for a sequence to
complete before initiating recovery. Can also be defined as the maximum time allowed for
a round-trip transmission before an error condition is declared.
E_Port
Expansion Port; a type of switch port that can be connected to an E_Port on another switch
to create an ISL. See also ISL.
EE_Credit
End-to-end Credit; the number of receive buffers allocated by a recipient port to an
originating port. Used by Class 1 and 2 services to manage the exchange of frames across
the fabric between source and destination. See also End-to-end Flow Control, BB_Credit.
SAN Switch 2/32 Version 4.2.x Installation Guide 85