Using the SEHI Hub View

Figure 2-12. SEHI Polling Intervals

Setting the Polling Intervals

To set the polling intervals used by SPMA and the SEHI:

1.Click on the Device button to display the Device menu.

2.Drag down to Polling Intervals, and release. The SEHI Polling Intervals window, Figure 2-12, will appear.

3.To activate the desired polling, click mouse button 1 on the selection box to the right of each polling type field.

4.To change a polling interval, highlight the value you would like to change, and enter a new value in seconds. Note that the Use Defaults option must not be selected, or values will revert back to default levels when you click on Apply, and your changes will be ignored.

5.If you wish to use your new polling interval settings as the default values that SPMA will use for each SEHI-controlled stack you are managing, use mouse button 1 to select the Save As Defaults option.

6.If you wish to replace existing values with the current set of default values, use mouse button 1 to select the Use Defaults option.

7.Click mouse button 1 on the Apply button once your changes are complete. Changes take effect after the current polling cycle is complete.

You can set the update intervals for the following:

Contact Status

This polling interval controls how often the SEHI is “pinged” to check SPMA’s ability to maintain a connection with the device.

Managing the Hub

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Cabletron Systems SEHI-22/24, SEHI-32/34 manual Setting the Polling Intervals, Contact Status
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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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