An example of the output from this command is shown in Figure 8 on page 23.

￿

8260> show backplane_paths fddi

 

Physical Path

Logical Network

---------------

---------------

 

FDDI_PATH_8250_1

in use

 

FDDI_PATH_8250_2

in use

 

FDDI_PATH_8250_3

in use

 

FDDI_PATH_8250_4

in use

 

FDDI_PATH_8250_5

in use

 

FDDI_PATH_8250_6

in use

 

FDDI_PATH_8250_7

in use

 

FDDI_PATH_8250_8

available

￿

8260>

 

Figure 8. Backplane Path Display for FDDI Segments

The number of FDDI paths used by a single FDDI network on the Enhanced TriChannel equals the number of FDDI modules on that network.

￿

￿

The FDDI paths on the Enhanced TriChannel use the same pins on the backplane as are used by the Ethernet and/or token-ring segments. In Figure 8, the FDDI paths shown as ″in use″ are those backplane pins which are used by other segment types (that is, token-ring and/or Ethernet). Also, note that in this example, we had no FDDI modules installed in our 8260.

On the ShuntBus, in addition to the two dedicated Ethernet segments, there can be up to 4 FDDI segments. Unlike, the Enhanced TriChannel, there is no concept of FDDI paths on the ShuntBus. Instead, there are 4 FDDI networks, each using 14 pins. The FDDI segments on the ShuntBus use the same pins as the

token-ring segments.

2.5 Network Allocations on the 8260 Backplane

As we now have so many options of switching modules and ports between networks it is perhaps a good time to clarify the rules regarding those allocations.

∙8250 Ethernet ports or modules can be connected to parallel addressed segments (ethernet_1 thru 3 on the Enhanced TriChannel) only.

∙8250 Ethernet ports or modules cannot be connected to serially addressed segments (ethernet_4 thru 8) on either the TriChannel or ShuntBus.

∙8260 Ethernet ports or modules can be connected to any of the segments (ethernet_1 thru 8) on the TriChannel or ShuntBus. When connected to ethernet_1 thru 3, they use parallel addressing and when connected to ethernet_4 thru 8 they use serial addressing.

∙8250 token-ring or FDDI modules can only be connected to the segments on the Enhanced TriChannel. They cannot be connected to the segments on the ShuntBus.

∙8260 token-ring (or future 8260 FDDI) modules cannot be connected to any segment on the Enhanced TriChannel. They can only be connected to the segments on the ShuntBus.

Chapter 2. Backplane Architecture 23

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Image 45
IBM manual Network Allocations on the 8260 Backplane, An example of the output from this command is shown in on
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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.
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