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3.4 LAN Message Class
3-6
protocol-specific errors and exceptions and retrying bus sequences
within the scope of an I/O operation. The system is also responsible for
maintaining a timer for SCSI I/O operations if this is required by the host
system. The host driver may use the provided SCSI Task Management
functions to terminate one or more I/O operations when a timeout occurs.
For more information regarding the SCSI Message Class, refer to the
LSI Logic Fusion-MPT specification.
The LSIFC929 provides a LAN message interface that supports the
system TCP or UDP network driver stack, providing MAC level
communication between FC ports.
The typical network driver stack in the system consists of a Socket Driver
with a Transport Driver Interface, supported by TCP or UDP and IP
drivers, and a Hardware Abstraction layer interface to the LSIFC929. The
TCP driver provides data buffer segmentation. The IP driver provides
MTU segmentation, adds a header and checksum to the TCP data, and
maps each Fibre Channel MAC port address to an IEEE standard
address. ACKs are required at the TCP driver to ensure all segments of
the data block are transmitted/received.
The LAN message interface may also be used by proprietary protocol
stacks in the host, as shown in
LSIFC929 transmits and receives data between FC nodes, without
regard to data content. For more information regarding the LAN Message
Class, refer to the LSI Logic Fusion-MPT specification.
LSIFC929 Overview
Copyright © 2000, 2001 by LSI Logic Corporation. All rights reserved.
Figure
3.3. In this environment, the
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