Using the SEHI Hub View

Device, Module, and Port status descriptions.

Device, Module, and Port statistics, which provide a complete breakdown of packet activity.

Device, Module, and Port-level pie charts, graphs and meters, for a graphic representation of the types and levels of traffic passing through the device. (For more information about pie charts, graphs and meters, see the Charts, Graphs and Meters chapter in the SPMA Tools Guide.).

Port Display Form

You can change the type of information displayed for each port in the device by using the Port Display Form option on the Device and Module menus. Changing the port display form via the Device menu will affect all ports in the SEHI- controlled stack; changing the display form via the Module menu will affect only those ports on the selected device.

To change the port display form:

1.Click on the Device button to display the Device menu, or on the Module Index box to display the Module menu.

2.Drag down to Port Display Form, then right as necessary to select one of the port display options. The current selection will be displayed in the Port Display Form field on the port display.

Port display form options are:

Load

Shows a percentage for each active port that represents that port’s portion of the theoretical maximum traffic level — for Ethernet networks, 10 megabits per second.

Collisions

Displays port traffic data in a collisions/second format. The SEHI counts both receive collisions — those collisions it detects while receiving a transmission — and transmit collisions — those it detects while transmitting (i.e., a port in the SEHI-managed stack transmitted one of the colliding packets); however, those counts are combined and a single total value is displayed.

Errors

Shows port traffic errors in an errors/second format. You can display any one of the following types of errors:

Total errors

Alignment errors

CRC (Cyclic Redundancy Check) errors

Runts

Giants

OOW (Out-of-Window) Collisions

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Monitoring Hub Performance

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Cabletron Systems SEHI-32/34, SEHI-22/24 manual Port Display Form, Load, Collisions, Errors

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.