HP FC Switch Surestore 6164, Reference Manual

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Class 3 A connectionless frame switching service between two ports, without
notification of delivery or nondelivery. Can also be used to provide a
multicast connection between originator and recipients, with notification of
delivery or nondelivery.
Class 4 Connection-oriented service that provides a virtual circuit between two ports,
including notification of delivery or non-delivery. Allows fractional parts of
the bandwidth to be used in a virtual circuit.
Class 6 Connection-oriented service that provides a multicast connection between
the multicast originator and recipients, including notification of delivery or
non-delivery.
Class F A connectionless service for control traffic between switches, with
notification of delivery or nondelivery between the E_Ports.
Class of service A set of specific delivery characteristics and attributes for frame delivery.
CLS Close Primitive Signal. The protocol used by a port in an arbitrated loop to
close a circuit.
Code Balance The ratio of one bit to the total number of transmitted bits.
Comma Unique pattern (either 1100000 or 0011111) used in 8b/10b encoding to
specify character alignment within a data stream. See also K28.5.
Community (SNMP) Relationship between a group of SNMP managers and an SNMP agent, in
which authentication, access control, and proxy characteristics are defined.
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 and EE_Credit.
CT_HDR Common transport header. A header that conforms to the Fibre Channel
Common Transport (FC_CT) protocol.