When the local link is operating in autonegotiation mode for the speed and duplex parameters at 100 Mbps and below and both full and half duplexes, then the link partner uses either the 100 Mbps or 10 Mbps speeds with either duplex.

When the speed parameter is operating in forced mode, the value must match the speed value of the link-partner. If the duplex parameter does not match between the local link and the link partner, the link may come up; however, traffic collisions will occur.

When the local link speed parameter is set to autonegotiation and the link partner speed parameter is set to forced, the link may come up depending on whether the speed value can be negotiated between the local link and the link partner. The interface in autonegotiation mode will always try to establish a link (if there is a speed match) at half duplex by default. Because one of the two interfaces is not in autonegotiation mode, the interface in autonegotiation mode detects only the speed parameter; the duplex parameter is not detected. This method is called parallel- detection.

Caution –The establishment of a link with a duplex conflict always leads to traffic collisions.

For a local link parameter to operate in forced mode, the parameter must have a value other than auto. For example, to establish a forced mode link at 100 Mbps with half duplex, type the following at the OBP prompt:

ok boot net:speed=100,duplex=half

Note –In the examples in this section, net is an alias for the default, integrated network interface device path. You can configure other network devices by specifying a device path instead of using net.

To establish a forced mode link at 1000 Mbps with half duplex that is a clock master, type the following command at the OBP prompt:

ok boot net:speed=1000,duplex=half,link-clock=master

Note –The link-clockparameter must have a value that corresponds to the link-clockvalue of the link partner. For example, if the link-clockvalue on the local link is set to master, the link-clockvalue on the link partner must be set to slave.

42 Sun Crypto Accelerator 4000 Board Installation and User’s Guide • May 2003

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Sun Microsystems 4000 manual Ok boot netspeed=100,duplex=half, Ok boot netspeed=1000,duplex=half,link-clock=master
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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.
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