Fcoe; Power Management; Adaptive Interrupt Frequency; Asic With Embedded Risc Processor - Qlogic FastLinQ 3400 Series User Manual

1–Product Overview
Features

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.

Adaptive Interrupt Frequency

The adapter driver intelligently adjusts host interrupt frequency based on traffic
conditions to increase overall application throughput. When traffic is light, the
adapter driver interrupts the host for each received packet, minimizing latency.
When traffic is heavy, the adapter issues one host interrupt for multiple,
back-to-back incoming packets, preserving host CPU cycles.

ASIC with Embedded RISC Processor

The core control for QLogic 8400/3400 Series adapters resides in a tightly
integrated, high-performance ASIC. The ASIC includes a RISC processor that
provides the flexibility to add new features to the card and adapt to future network
requirements through software downloads. In addition, the adapter drivers can
exploit the built-in host offload functions on the adapter as host operating systems
are enhanced to take advantage of these functions.
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