Chapter 4: Installing the Linux Drivers

modprobe bnx2i en_tcp_dack=0

Default: ENABLED

sq_size

Use the “Configure SQ size” parameter to select the send-queue size for off-loaded connections. The SQ size determines the maximum SCSI commands that can be queued. Also, SQ size has a bearing on the number of connections that can be off-loaded; as QP size increases, the number of connections supported decreases. With the default values, the AT-2872SX ExpressCard module can offload 28 connections.

Defaults: 128

Range: 32 to 128

Note

Broadcom validation is limited to a power of 2; for example, 32, 64, 128.

rq_size

Use the “Configure RQ size” parameter to choose the size of asynchronous buffer queue size per off-loaded connections. The RQ size is not required to be greater than 16 because it is used to place iSCSI ASYNC/NOP/REJECT messages and SCSI sense data.

Defaults: 16

Range: 16 to 32

Note

Broadcom validation is limited to a power of 2; for example, 16, 32.

event_coal_div

The Event Coalescing Divide Factor parameter is a performance tuning parameter used to moderate the rate of interrupt generation by the iscsi firmware.

Defaults: 1

Valid values: 1, 2, 4, 8

bnx2i_nopout_when_commands_active

The” iSCSI NOOP even when connection is not idle” parameter enables the offload initiator to send iSCSI NOP-OUT on wire even when the link is not truly idle. This parameter was introduced to avoid unnecessary

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Allied Telesis AT-2872SX manual Modprobe bnx2i entcpdack=0, Sqsize

AT-2872SX specifications

The Allied Telesis AT-2872SX is a high-performance, versatile networking switch designed specifically for the demands of modern network environments. With its compact form factor and robust feature set, it serves as an ideal solution for businesses looking to enhance their network infrastructure with reliability and efficiency.

One of the standout features of the AT-2872SX is its support for both Ethernet and Fast Ethernet technology, making it a flexible choice for organizations that require diverse network speeds. This switch is equipped with two 1000BASE-SX Fiber ports, allowing it to provide high-speed connectivity over fiber optics. This is particularly beneficial for applications that demand high bandwidth and low latency, such as video conferencing and large data transfers.

The AT-2872SX comes with a user-friendly interface that simplifies configuration and management. It supports standard Network Management Protocols such as SNMP, enabling remote management and monitoring of the switch. This feature is crucial for IT departments that aim to maintain optimal network performance without the need for constant physical oversight.

Another significant characteristic of the AT-2872SX is its Quality of Service (QoS) capabilities. This technology allows administrators to prioritize network traffic, ensuring that critical applications receive the bandwidth they need without interruption. This is essential in multi-service networks where voice, data, and video traffic coexist.

In terms of security, the AT-2872SX offers multiple features to safeguard network integrity. It supports IEEE 802.1X port-based authentication, ensuring that only authorized devices can connect to the network. Additionally, it features VLAN support which segments traffic and enhances security by isolating sensitive data streams.

The hardware design of the AT-2872SX ensures durability and reliability, making it suitable for deployment in various environmental conditions. Its fanless operation not only provides silent performance but also contributes to reduced energy consumption, aligning with goals for sustainability in network infrastructure.

In conclusion, the Allied Telesis AT-2872SX switch stands out as a leading choice for organizations looking to bolster their network capabilities. Its comprehensive feature set, including high-speed fiber connectivity, robust management options, traffic prioritization, and built-in security measures, make it a valuable asset in any enterprise networking environment. As businesses increasingly rely on efficient and reliable networking solutions, the AT-2872SX remains a strong contender in the market.