Chapter 3

Operation

The 9E428-12 and the 9E429-12 modules are 13 port devices. Twenty four front panel ST connectors support 12 10BASE-FL ports, each port being a separate collision domain with the first port connecting to INB-B. The 9E428-36 and the 9E429-36 modules are 37 port devices. Seventy two front panel ST connectors support 36 10BASE-FL ports, each port being a separate collision domain with the first port connecting to INB-B.

As shown in Figure 3-1, Ethernet Network Interface Blocks (ENIBs) convert data packets received from any of the 10BASE-FL ports into a canonical frame format before forwarding to the SmartSwitch ASIC, while the Internal Network Bus Network Interface Block (INB NIB) converts data packets received from the INB into a canonical format before forwarding to the SmartSwitch ASIC.

All data packets destined for a front panel port, the INB, or the i960 are converted into the canonical format before forwarding to the SmartSwitch ASIC. Network Interface Blocks (NIBS) check for valid data packets entering the system. If an errored data packet is found, the SmartSwitch ASIC flags the error and does not forward the errored data packet to any outbound ports. Once in this common format, the SmartSwitch ASIC decides from header information the port destination of data packets. Data packets are then converted from the canonical format to the proper format for the interface destination whether it is a front panel port, or connection to the INB.

3-1

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Cabletron Systems 12 manual Operation
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12 specifications

Cabletron Systems 12, widely regarded for its impact on networking technology in the late '80s and early '90s, has become a pivotal part of the history of data communications. This product marked a significant leap forward in the area of local area networking (LAN), blending reliability with advanced capabilities tailored for varied business needs.

One of the standout features of Cabletron Systems 12 is its ability to facilitate scalable networking solutions. It was designed with modularity in mind, allowing businesses to expand their network infrastructure as their needs evolved. This characteristic made it particularly appealing to organizations experiencing rapid growth, as it provided a cost-effective way to upgrade and add components without a complete system overhaul.

The architecture of Cabletron Systems 12 was based on a multi-layer switching technology. This approach enhanced the speed and efficiency of data transmission across the network. By employing a combination of hardware and software solutions, it minimized bottlenecks and ensured superior performance during high-traffic periods. Enhanced throughput made it suitable for a range of applications, from small businesses to enterprise-level networks.

Another significant feature was its support for a diverse set of network protocols, including Ethernet and Token Ring. This flexibility allowed organizations to integrate various networking technologies into a single cohesive system, thereby protecting their investment in existing infrastructure while still enabling new technology adoption.

The design of Cabletron Systems 12 also prioritized management and monitoring capabilities. With user-friendly interfaces and tools, network administrators could easily configure and manage their networks, enhancing overall operational efficiency. Real-time diagnostics and reporting features helped in troubleshooting and maintaining optimum network performance.

In addition to its performance-oriented features, Cabletron Systems 12 was also noted for its robust security protocols, which were crucial in an era where cyber threats were beginning to rise. Comprehensive security measures ensured that data integrity and privacy were maintained, providing peace of mind for organizations relying on digital communications.

Overall, Cabletron Systems 12 encapsulated the technological innovations of its time, offering a blend of speed, scalability, and security. Its ability to adapt to the changing landscape of networking set a precedent for future developments in the field, making it a noteworthy milestone in the evolution of communication technology.
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