2.An AMP/SMP MAC frame with the A/C bit set B′0′ is seen. This indicates that there is only one station attached to this port and the address of that

station is one which is seen in the AMP/SMP MAC frame with the A/C bit set to B′0′. In this case, the AMP/SMP MAC frame sent by the upstream station

is copied by the station attached to this port. Then the station attached to

this port has issued its own AMP/SMP MAC frame which will pass this Ring Monitor with the A/C bit set to B′0′. The source address in this AMP/SMP

MAC frame is the address of the station attached to this port.

3.Several AMP/SMP MAC frames with the A/C bit set to B′1′ are seen followed by an AMP/SMP MAC frame with the A/C bit set B′0′.

This indicates that there are several stations attached to this port via a

fan-out device and the addresses of these stations are the source addresses in the AMP/SMP MAC frames.

In this case, the AMP/SMP MAC frame sent by the upstream station is copied by the station attached to the first port of the fan-out device and the AMP/SMP MAC frame issued by that station is subsequently copied by the station attached to the second port of the fan-out device and so on. The source addresses in all the AMP/SMP MAC frames with the A/C bit set to B′1′ plus the source address of the AMP/SMP MAC frame with the A/C bit set to B′0′ show addresses of the stations attached to this port (via the

fan-out device) and are used by the Ring Monitor to build the address-to-port map for this port.

Note

A fan-out device may support more than 8 stations which will result in the Ring Monitor seeing as many AMP/SMP frames as the number of stations. However, the Ring Monitor will only save the address of the first eight stations.

The AMP/SMP issued by the last (or the only) station on each port will pass the Ring Monitor function on that port and will immediately be seen by the Ring Monitor function on the next port downstream from this port. As soon as the Ring Monitor on the downstream port sees this AMP/SMP MAC frame with the A/C bit set to B′0′, it moves downstream of its associated port and will then signal the Ring Monitor on the upstream port which currently is situated downstream of its associated port to move to the upstream of its associated port to prepare for the next round of neighbor notification as well as assisting the Recovery ASIC with the beacon recovery process.

The above procedure will be repeated on all the ports helping the Recovery ASIC to build an accurate address-to-port map for all the ports on the module.

An example of the output for this command is shown in Figure 103 on page 166.

Chapter 8. 8260 Token-Ring Support 165

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Image 187
IBM 8260 manual Token-Ring Support

8260 specifications

The IBM 8260 is a significant entry in the realm of enterprise servers, recognized for its performance, scalability, and robust features designed to cater to demanding business environments. It primarily serves as a high-capacity server for large organizations, capable of handling extensive workloads and complex applications without compromising speed or efficiency.

One of the standout features of the IBM 8260 is its powerful processing capabilities. It typically comes equipped with multiple processor units based on the IBM POWER architecture, which is renowned for its high-performance computing. This architecture allows the server to execute numerous simultaneous tasks, making it ideal for environments that require multitasking and high throughput.

Memory capacity is another key characteristic of the IBM 8260. Depending on the specific configuration, it can support substantial amounts of RAM, ensuring that applications can run effectively without the bottlenecks often associated with data-intensive tasks. This is crucial for enterprises that rely on real-time data analytics, large database management, and resource-heavy applications.

In terms of storage, the IBM 8260 offers flexible options. It supports a variety of storage solutions, including solid-state drives (SSDs) and traditional hard drives, catering to different performance and capacity needs. This scalability in storage helps organizations manage their data effectively while ensuring quick access and retrieval times.

Connectivity is also a prominent feature of the IBM 8260. The server includes advanced networking capabilities, supporting various protocols and technologies that facilitate fast data transfer and communication between devices. This enhances overall network performance, essential for businesses that depend on cloud computing and distributed computing environments.

Additionally, the IBM 8260 is designed with a focus on reliability and availability. It incorporates redundant components, such as power supplies and cooling systems, minimizing the risk of downtime. This is critically important for enterprises that require continuous availability of services.

The server’s management features are also noteworthy. IBM provides a suite of management tools that allow IT administrators to monitor performance, configure hardware settings, and troubleshoot issues seamlessly. This ease of management is bolstered by automation capabilities, enabling organizations to enhance operational efficiency.

In conclusion, the IBM 8260 stands out in the competitive server landscape due to its high processing power, extensive memory and storage options, advanced connectivity, reliability features, and robust management tools. Such attributes make it a viable choice for organizations seeking to enhance their IT infrastructure and streamline their operations effectively.