Chapter 7. 8260 Ethernet Modules

This chapter will describe the Ethernet modules for the 8260 multiprotocol intelligent switching hub. Each module will be described along with its features and the necessary steps required to configure these modules. Where necessary, examples will be given of where the module would be used. Currently, the available 8260 Ethernet modules are:

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8260 Ethernet 24-Port 10Base-T Module

8260 Ethernet 10-Port 10Base-FB Module

8260 Ethernet 20-Port 10Base-T Module

8260 Ethernet 40-Port 10Base-T Module

8260 Ethernet Security Daughter Card

Also, note that you can install and use any 8250 Ethernet module in the 8260 multiprotocol intelligent switching hub. For information about the 8250 Ethernet modules please refer to IBM 8250 Intelligent Hub and IBM HUB Management Program/6000, (GG24-4033).

7.1 Ethernet LAN Overview

The following is a brief introduction to Ethernet. For further information about the Ethernet LAN architecture, please refer to LAN Concepts and Products, GG24-3178-03.

Though Ethernet V2 and 802.3 are not identical, the term Ethernet is widely used to describe LANs that use either protocol. As most of the information in this book applies equally to both Ethernet V2 and 802.3 LANs, the term Ethernet (802.3) will be used throughout this book. However, where there are differences, they will be indicated by using the appropriate terminology.

The Ethernet architecture uses Carrier Sense Multiple Access with Collision Detection (CSMA/CD) as the protocol to control the Ethernet bus operation. As the name implies, CSMA/CD permits multiple stations to access the Ethernet; however, only one station can occupy the bus at any time.

7.1.1 CSMA/CD

The CSMA/CD protocol is simple and straightforward:

∙When a station wants to transmit some data, it has to first listen to ascertain whether the bus is occupied or not.

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If the bus is free, the station starts transmitting immediately.

If the bus is busy, the station waits and continues to listen until no activity is detected on the bus. It starts to transmit its data only when the bus has been cleared of any traffic.

Occasionally, two stations can begin to transmit simultaneously. This results in a condition known as a collision. To resolve this condition, both stations stop transmitting, wait for a random interval, listen again and retransmit when the bus is free. If a station′s subsequent attempt results in another collision, its wait time will be doubled and the cycle is repeated. This cycle may be repeated up

© Copyright IBM Corp. 1995

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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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