Using the SEHI Hub View

To view device statistics at the Device, Module, or Port levels:

1.Display the Device, Module, or Port menu by clicking mouse button 3 in the appropriate area (refer to Figure 2-5, page 2-7).

2.Drag down to Statistics and then right to either General/Errors or Protocols/Frames and release.

The Hub View begins counting the selected statistics when you open the window; counts will be cumulative until you use the Reset button or close the window.

NOTE

When a device is reset, statistics windows and/or statistics displays in the Hub View may display very large numbers for one polling interval. This is due to the resetting of the counters.

Because the SEHI does not currently support Protocol counts, the Protocol fields in the Protocols/Frames window will remain blank.

Note that the module statistics windows include the module number in the window title; the port statistics windows include the module and port numbers in the window title.

General/Error Statistics

The General/Errors statistics windows display the following fields:

Received Bytes

The number of bytes of data received by this device, module, or port since the window was last opened or reset.

Total Packets

The number of packets of all types received by this device, module, or port since the window was last opened or reset.

Avg Packet Size

The number of bytes per packet received by this device, module, or port since the window was last opened or reset. The average packet size is calculated by dividing the number of bytes received by the number of packets received.

Broadcast Packets

The number of broadcast packets received by this device, module, or port since the window was last opened or reset. Broadcast packets have a single address recognized by each station on the net: this address is designated in IP form as 255.255.255.255, or in MAC hexadecimal form as FF-FF-FF-FF-FF-FF. The ARP and RARP requests sent by bridges and routers are broadcast packets.

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Monitoring Hub Performance

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Cabletron Systems SEHI-32/34, SEHI-22/24 manual Received Bytes, Total Packets, Avg Packet Size, Broadcast Packets

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.