Gus, I think that class of service for the director is referring to a subject near and dear to all the hearts of ANCR holders, that is old history now. These are the FC definitions. No one needs Class 1, but Iband suggests that ANCRs past class 1 pioneering was valuable after all? All the SAN FC biz is class 2/3
Class 1
CONTEXT [Fibre Channel]
A connection-oriented class of communication service in which the entire bandwidth of the link between two ports is dedicated for communication between the ports and not used for other purposes. Also known as dedicated connection service. Class 1 service is not widely implemented. cf. intermix
Class 2
CONTEXT [Fibre Channel]
A connectionless Fibre Channel communication service which multiplexes frames from one or more N_Ports or NL_Ports. Class 2 frames are explicitly acknowledged by the receiver, and notification of delivery failure is provided. This class of service includes end to end flow control.
Class 3
CONTEXT [Fibre Channel]
A connectionless Fibre Channel communication service which multiplexes frames to or from one or more N_Ports or NL_Ports. Class 3 frames are datagrams, that is they are not explicitly acknowledged, and delivery is on a "best effort" basis.
Class 4
CONTEXT [Fibre Channel]
A connection-oriented class of communication service in which a fraction of the bandwidth of the link between two ports is dedicated for communication between the ports. The remaining bandwidth may be used for other purposes. Class 4 service supports bounds on the maximum time to deliver a frame from sender to receiver. Also known as fractional service. Class 4 service is not widely implemented.
Class 6
CONTEXT [Fibre Channel]
A connection-oriented class of communication service between two Fibre Channel ports that provides dedicated unidirectional connections for reliable multicast. Also known as uni-directional dedicated connection service. Class 6 service is not widely implemented.
class of service
CONTEXT [Networking] [Fibre Channel]
A mechanism for managing traffic in a network by specifying message or packet priority.
The characteristics and guarantees of the transport layer of a Fibre Channel circuit. Fibre Channel classes of service include: connection services (Classes 1), guaranteed frame delivery with end to end flow control (Class 2), packetized frame datagrams (Class 3), quality of service sub-channels (e.g., constant sub rate or constant latency) (Class 4). Different classes of service may simultaneously exist in a fabric. The form and reliability of delivery in Class 3 circuits may vary with the topology. Different classes of service may simultaneously exist in a fabric.
The identification and grouping of data packets based on a priority label (in the packet header) or via other mechanisms (such as "per hop behavior", defined by the IETF's Differentiated Services).
Notice that HWP qualified the HA ANCR products that have
The SANbox-16HA includes all the features of Ancor's standard 16-port switch, plus optional dual redundant power supplies.
The data center will want components that have lots of redundancy.
I watched the SUNW webcast on the T3. In our town we have a few streets in the historic part of town made of brick.
SUNW concept is similar in that they rolled out one of the little bricks and then at the end they showed a giant wall built of the same unit. I think they will sell them.
I don't agree with the storage arguments on SI that say So and so can't sell against company x. The market data suggests that both SUNW and EMC could take market share from lots of others, double their sales to current customers, thus growing for some years without coming face to face in the arena. The incumbents tend to remain in office a long time. Everyone supports switched fabric now except for IBM and it looks like they will limp out of the gate next month. |
