Operating Modes for Bridging Ports, ∙ Time-to-Forget

To do this, each address in the database has an age assigned to it. When the address is learned, the age is set to zero. At subsequent time intervals this address is incremented. There are two system-wide timers which govern the length of the time the learned entries will be kept in the filtering database:

∙Time-to-Forget

If an address is already in the filtering database and no packets are received from this source by the Multiprotocol Interconnect module within the

time-to-forget interval, then the address is marked as forgotten. Forgotten entries are no longer used for filtering purposes. They remain in the filtering database for historical information, until the time-to-delete period expires.

∙Time-to-Delete

After an address is marked as forgotten, this parameter determines the length of the time the entry may remain in memory without being relearned. If this time expires before any packets are received from the module, the entry is deleted from the filtering database.

Time-to-forget and time-to-delete are system-wide parameters and can be set by the user using the Bridge System Parameters panel.

11.8.5.2 Operating Modes for Bridging Ports

Each port of the Multiprotocol Interconnect module which is configured for bridging (TB or SRT) can operate in one of the following two modes:

1.Normal Mode

In this mode the port can perform the following functions:

∙Can learn new addresses if Source Address Learning is enabled for that port

∙

Can forward/filter frames

Can communicate with network management software

Will participate in spanning tree protocol

2.Security Mode

In this mode the port can perform the following functions:

∙Can learn new addresses if Source Address Learning parameter for that port is enabled

∙

Can forward frame if destination address is permanent or static

Can communicate with network management software

Will participate in spanning tree protocol if STP is enabled

Note that the difference between normal and security mode is that in security mode, only the frames destined to stations with permanent entry will be bridged via the port. You can use the security mode to ensure that the stations attached to a secure port can communicate with specific stations on the other LANs through the Multiprotocol Interconnect module.

The mode for each port can be set independently from the other ports. The setting of the mode is done through the LMS on the Transparent Bridging Port Parameters panel.

Chapter 11. 8260 Multiprotocol Interconnect Module 273

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.

IBM 8260 Operating Modes for Bridging Ports, ∙ Time-to-Forget, ∙ Time-to-Delete, Normal Mode

Models: 8260