Chapter 1: Introduction

The second mode of operation is using Cabletron Systems Inverse Multiplexer (IMUX) functionality to aggregate multiple DS1 connections into single higher bandwidth WAN connections. To operate in this mode, the user configures the appropriate IMUX groups containing the DS1 connections.

Along with the built-in management features (Network Tools) described in Chapter 4, the HSIM-W85 can be managed using SNMP. Statistical data can be accessed via SNMP by referencing the interface group defined in RFC 1213.

1.4DATA FLOW IN THE HSIM-W85

The T1 data streams are terminated by T1 framers, which provide an HDLC bit stream to the HDLC controller. The controller receives data packets from each of the bit streams and places them in a memory subsystem. The on board CPU examines the packet and notifies the host of its arrival. Finally, a Cabletron proprietary ASIC transfers the data to the host platform.

This process is followed in reverse when a packet is transmitted from the host platform out the T1 ports. The host platform notifies the HSIM-W85 when a packet is coming and transfers the packet to the memory. The HDLC format is applied to the data, then the data is framed to a T1 format, and passed to the framer. The T1 data is transmitted out through the T1 interface.

1.5FEATURES

The following are some of the highlights of the HSIM-W85 features:

Data Transfer Rates of 12 Mbps in full duplex, when running all eight T1s carrying continuous data traffic of 64-byte packets or larger.

High-level Data Link Control (HDLC) protocol

T1 Inverse Multiplexing (IMUX)

WAN IP Priority Queuing functionality

DS1 Alarm Thresholds

SNMP support

1-4

HSIM-W85 User’s Guide

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Cabletron Systems manual Data Flow in the HSIM-W85, Features

W85 specifications

Cabletron Systems W85 is a prominent networking solution that was developed to support the burgeoning demand for high-performance data communications in the enterprise environment. As an advanced multi-layer switch, the W85 effectively integrates various networking technologies, offering robust support for both wired and wireless connectivity, making it particularly suitable for complex network infrastructures.

One of the standout features of the W85 is its scalability. Designed to grow with the needs of a business, the W85 can accommodate an increasing number of users and devices without sacrificing performance. This is essential in today's digital workspace, where employees and equipment are continually being added to the network.

The W85 operates across multiple layers of the OSI model, offering Layer 2 and Layer 3 switching capabilities. Layer 2 functionalities enable efficient Ethernet switching and VLAN support, ensuring that data can move swiftly within local networks. Meanwhile, its Layer 3 capabilities facilitate dynamic routing, allowing for intelligent data distribution across different network segments. This dual functionality enhances the W85's versatility, making it suitable for both small and large-scale deployments.

Equipped with advanced security features, the Cabletron W85 places a strong emphasis on network integrity. It supports comprehensive security protocols that help to mitigate potential threats. Features such as Access Control Lists (ACLs) allow administrators to define and enforce security policies, ensuring that only authorized users have access to sensitive data. Furthermore, the device supports advanced encryption methods to protect data in transit, which is crucial for safeguarding information in modern enterprises.

The W85 is also notable for its management capabilities. It provides an intuitive web-based interface for system administrators, simplifying the configuration and monitoring processes. With support for SNMP (Simple Network Management Protocol), administrators can efficiently manage network devices and receive alerts for potential issues before they escalate into significant problems.

In terms of connectivity, the Cabletron W85 features multiple Gigabit Ethernet ports designed to handle high-speed data transfer. This allows for seamless integration with existing infrastructure while ensuring that performance remains high even under heavy loads. The device is also compatible with various network management protocols, positioning it as a streamlined component in any enterprise’s networking strategy.

The Cabletron Systems W85 embodies the future of enterprise networking with its combination of scalability, security features, and robust management tools, ensuring it remains a relevant choice for organizations looking to enhance their networking capabilities.