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Chapter 1: Introducing the AT-2973SX, AT-2973T, and AT-2973T/4 Adapters
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Functional Descriptions
The AT-2973SX, AT-2973T, and AT-2973T/4 Broadcom NetXtreme II
adapters are a new class of Gigabit Ethernet (GbE) converged network
interface controller (C-NIC) that can simultaneously perform accelerated
data networking and storage networking on a standard Ethernet network.
The C-NIC offers acceleration for all popular protocols used in the data
center, such as:
TCP Offload Engine (TOE) for accelerating TCP
Internet Small Computer Systems Interface (iSCSI) offload for
accelerating network storage access featuring centralized boot
functionality (iSCSI boot)
Enterprise networks that use multiple protocols and multiple network
fabrics benefit from the C-NICs ability to combine data communications,
storage, and clustering over a single Ethernet fabric by boosting server
CPU processing performance and memory utilization while alleviating I/O
bottlenecks.
The AT-2973SX adapter is set to a speed of 1000 Mbps in full duplex
mode automatically. You cannot change the speed or duplex mode of this
adapter.
The AT-2973T and AT-2973T/4 adapters include a 10/100/1000-Mbps
Ethernet MAC with both half-duplex and full-duplex capability and a 10/
100/1000-Mbps PHY. The transceiver is fully compatible with the IEEE
802.3 standard for auto-negotiation of speed.
As part of the company’s green range, all of three adapters are
engineered to reduce power consumption. They incorporate centralized
power management features that automatically place idle circuitry into a
lower power mode to save energy.
The following sections provide functional descriptions of the AT-2973SX,
AT-2973T, and AT-2973T/4 adapters:
“AT-2973SX Adapter” on page 17
“AT-2973T Adapter” on page 18
“AT-2973T/4 Adapter” on page 20