Using the SEHI Hub View

Figure 2-11. The Port Source Address List

To view a port’s Source Address List:

1.Display the Port menu by clicking mouse button 3 in the appropriate Port Status box.

2.Drag down to Source Address List and release.

The Source Address List window displays addresses of all devices that have transmitted packets that were detected by the selected port within a time period less than the Source Address Table’s (SAT) defined ageing time (addresses that have not transmitted a packet during one complete cycle of the ageing timer will be purged). The Ageing Timer is user-configurable; see Setting the Ageing Time in the Source Address chapter, later in this manual. The List window can display about ten addresses at once; use the scroll bar to the right of the List window to view additional addresses, if necessary.

Since the SAT is constantly changing as old entries are aged out and new ones learned from the network, you should occasionally update a displayed list by

clicking mouse button 1 on the button. Once displayed, the list is static and will not reflect recent changes. The displayed number of Active Users is also

static; this field will also update when you click on .

Managing the Hub

In addition to the performance information described in the preceding sections, the Hub View also provides you with the tools you need to configure your HUBStack and keep it operating properly. Hub management functions include setting polling intervals, enabling ports at the module and port level, and disabling ports at the port level.

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Managing the Hub

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Cabletron Systems SEHI-32/34, SEHI-22/24 manual Managing the Hub
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SEHI-22/24, SEHI-32/34 specifications

Cabletron Systems was a notable player in the networking hardware market during the rise of local area networks (LANs) in the late 20th century. Among its innovative products were the SEHI-22/24 and SEHI-32/34 modules, which were designed to enhance network capabilities in enterprise environments.

The SEHI-22/24 and SEHI-32/34 were versatile high-performance Ethernet switch modules that offered significant advantages in network management and connectivity. These modules were designed to work with Cabletron's modular switching and routing architecture, allowing for scalable solutions tailored to specific network demands. A key feature of the SEHI series was its support for a range of Ethernet standards, ensuring compatibility with diverse networking environments.

One notable characteristic of the SEHI-22/24 was its ability to support both 10Base-T and 100Base-TX Ethernet technologies. This dual support enabled organizations to leverage existing 10 Mbps infrastructure while facilitating upgrades to 100 Mbps speeds without needing a complete overhaul of the network. Similarly, the SEHI-32/34 offered even greater connectivity options, accommodating more users and devices while maintaining high throughput and low latency.

In terms of management features, the SEHI series was equipped with extensive traffic management capabilities, including Quality of Service (QoS) features that prioritized bandwidth for critical applications. This ensured that essential services such as voice over IP (VoIP) and video conferencing could function optimally, even during heavy network loads.

Furthermore, both modules featured advanced diagnostics and monitoring tools that provided network administrators with critical insights into traffic patterns and potential bottlenecks. This functionality was essential for maintaining network health and optimizing performance, especially in dynamic business environments.

Security also played a crucial role in the design of the SEHI-22/24 and SEHI-32/34. The modules incorporated support for various authentication methods and access controls, ensuring that sensitive data remained protected within the corporate network.

In summary, Cabletron Systems’ SEHI-22/24 and SEHI-32/34 offered significant advancements in Ethernet switching technology, allowing organizations to build robust, scalable, and secure networks. With their impressive features, compatibility, and capacity for management and security, these modules were instrumental in shaping reliable networking solutions for enterprises navigating the rapidly evolving digital landscape.
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