Flow Control Parameters

If all of the previous parameters are set to 1, autonegotiation will use the highest speed possible. If all of the previous parameters are set to 0, you will receive the following error message:

NOTICE: Last setting will leave vca0 with no link capabilities.

WARNING: vca0: Restoring previous setting.

Note –In the previous example, vca0 is the Sun Crypto Accelerator 4000 board device name where the string, vca, is used for every Sun Crypto Accelerator 4000 board. This string is always immediately followed by the device instance number of the board. Hence, the device instance number of the vca0 board is 0.

The vca device is capable of sourcing (transmitting) and terminating (receiving) pause frames conforming to the IEEE 802.3x Frame Based Link Level Flow Control Protocol. In response to received flow control frames, the vca device is capable of reducing its transmit rate. Alternately, the vca device is capable of sourcing flow control frames, requesting the link partner to reduce its transmit rate if the link partner supports this feature. By default, the driver advertises both transmit and receive pause capability during autonegotiation.

TABLE 3-3provides flow control keywords and describes their function.

TABLE 3-3Read-Write Flow Control Keyword Descriptions

Keyword	Description

adv-asmpause-capBoth the MMF and UTP adapters support asymmetric pause; hence, the vca device can pause only in one direction.

0=Off (default) 1=On

adv-pause-cap	This parameter has two meanings depending on the value of
	adv-asmpause-cap. (Default=0)
	Parameter Value	+	Parameter Value =	Description
	adv-asmpause-cap=		adv-pause-cap=
	1		1 or 0	adv-pause-capdetermines which
				direction pauses operate on.
	1		1	Pauses are received but are not
				transmitted.

Chapter 3 Configuring Driver Parameters 27

4000 specifications

Sun Microsystems, a pivotal player in the computing industry during the late 20th and early 21st centuries, was renowned for its innovative hardware and software solutions. Among its notable offerings were the Sun-6000, Sun-5000, and Sun-4000 series, powerful workstations and servers designed for a range of enterprise-level applications.

The Sun-6000 series, introduced in the early 1990s, marked a significant advancement in computing performance. These systems were built on the SPARC architecture, which facilitated high levels of processing power and multitasking capabilities. One of the main features of the 6000 series was its scalability, allowing organizations to increase their processing power by adding more modules. It also offered robust graphics performance, making it ideal for scientific visualization and complex data analysis.

Next in line was the Sun-5000 series. Launched shortly after the 6000 series, the 5000 line was celebrated for its reliability and ease of management. This series emphasized a balanced architecture, which combined processing capabilities with ample memory and storage options. Key characteristics included support for multiple processors, leading to improved performance for demanding applications. Additionally, the 5000 systems featured advanced input/output capabilities, ensuring fast data transfers—crucial for database applications and web servers.

Finally, the Sun-4000 series targeted businesses seeking affordable yet potent computing solutions. These servers boasted a modular design, allowing for easy upgrades and maintenance. The 4000 series was particularly notable for its support for various operating systems, including SunOS and Solaris. These systems were engineered to handle a range of workloads, from enterprise resource planning to web hosting, while still fitting into a value-driven budget.

Across all three series, Sun Microsystems prioritized compatibility and integration, ensuring that each system offered seamless connectivity with Sun's software solutions and third-party applications. Their commitment to open standards and interoperability set them apart in the competitive landscape of enterprise computing. Additionally, the use of high-quality components lent the systems durability, making them a wise investment for organizations looking to future-proof their IT infrastructure.

In summary, the Sun-6000, 5000, and 4000 series exemplified Sun Microsystems' ethos of innovation and reliability. These powerful systems catered to diverse business needs, setting benchmarks in performance and functionality that continue to influence modern computing.