User Manual

246 Glossary
configuration
1. A set of parameters that can be modified to fine-tune the operation of a switch. Use the configshow command
to view the current configuration of your switch.
2. In HP Zoning, a zoning element that contains a set of zones. The configuration is the highest-level zoning element
and is used to enable or disable a set of zones on the fabric. See also zone configuration.
COS
Class of service.
CP
Control processor.
credit
As applied to Fibre Channel technology, the number of receive buffers available to transmit frames between ports.
See also BB_Credit.
D_ID
Destination identifier. A three-byte field in the frame header that indicates the address identifier of the N_Port to
which the frame is headed.
defined zone configuration
The set of all zone objects defined in the fabric. Can include multiple zone configurations. See also zone
configuration.
digital certificate
An electronic document issued by a certificate authority (CA) to an entity, containing the public key and identity of
the entity. Entities in a secure fabric are authenticated based on these certificates. See also authentication, CA,
public key.
disparity
The proportion of 1s and 0s in an encoded character. Neutral disparity means an equal number of each; positive
disparity means a majority of 1s; negative disparity means a majority of 0s.
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 controller
A domain controller (or embedded port) communicates with and gets updates from other switches' embedded ports.
The well-known address is fffcdd, where dd is the domain number).
domain ID
A unique identifier for all switches in a fabric, used in routing frames. Usually assigned by the principal switch but
can be assigned manually. The domain ID for an HP StorageWorks switch can be any integer from 1 through 239.
E_D_TOV
Error-detect time-out value. The minimum 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 is declared. See
also R_A_TOV, RR_TOV.