1–Product Overview
Features
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iSCSI
The Internet Engineering Task Force (IETF) has standardized iSCSI. SCSI is a
popular protocol that enables systems to communicate with storage devices,
using block-level transfer (address data stored on a storage device that is not a
whole file). iSCSI maps the SCSI request/response application protocols and its
standardized command set over TCP/IP networks.
Because iSCSI uses TCP as its sole transport protocol, it greatly benefits from
hardware acceleration of the TCP processing. However, iSCSI as a Layer 5
protocol has additional mechanisms beyond the TCP layer. iSCSI processing can
also be offloaded, thereby reducing CPU use even further.
Cavium 8400/3400 Series Adapters target best-system performance, maintain
system flexibility to changes, and support current and future OS convergence and
integration. Therefore, the adapters’ iSCSI offload architecture is unique because
of the split between hardware and host processing.
FCoE
FCoE allows Fibre Channel protocol to be transferred over Ethernet. FCoE
preserves existing Fibre Channel infrastructure and capital investments. The
following FCoE features are supported:
Full stateful hardware FCoE offload
Receiver classification of FCoE and Fibre Channel initialization protocol
(FIP) frames. FIP is the FCoE initialization protocol used to establish and
maintain connections.
Receiver CRC offload
Transmitter CRC offload
Dedicated queue set for Fibre Channel traffic
DCB provides lossless behavior with PFC
DCB allocates a share of link bandwidth to FCoE traffic with ETS
Power Management
Wake on LAN (WOL) is not supported. The QLE3442-RJ adapter supports Energy
Efficient Ethernet (EEE). For information on configuring EEE, see the
User’s
Guide: Comprehensive Configuration Management, QLogic 3400 and 8400
Series Adapters
(part number BC0054512-00).