Nortel Networks 60-12T, 60-24T manual Port Partitioning

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Introduction

Port Functions

This section describes port partitioning and MDI/MDI-X modes. Partitioning is an automatic function of BayStack 60-12T/60-24T 10/100 Ethernet Hub ports. Certain ports can be configured to MDI/MDI-X mode with the MDI/MDI-X button.

Port Partitioning

A port is automatically disabled by the hub when a serious error occurs, such as continuous collisions on a single packet. This process is known as autopartitioning. A partitioned port indicates an overloaded network or a malfunctioning device on the network. When the port receives a valid packet from the connected device, or is able to transmit a packet from the port, it automatically releases the port so that it becomes active again.

•Partitioning occurs at a 100 Mb/s port when there are 61 consecutive collisions.

•Partitioning occurs at a 10 Mb/s port when there are 32 consecutive collisions, or when one collision lasting as long as 575.2us has occurred.

MDI/MDI-X Modes

Adapter cards in computers and workstations usually contain media-dependent interface (MDI) ports, also called uplink ports. Most hub ports are configured as media-dependent interfaces with built-in crossover ports, called MDI-X or normal ports. By default, all BayStack 60-12T/60-24T 10/100 Ethernet Hub ports are set to MDI-X, or normal, mode. You can connect your hub to computers and workstations in MDI-X mode using a standard straight-through cable.

You need a crossover cable to connect your hub to other hubs, switches and routers if you are using a hub port in normal, MDI-X, mode. You can use a straight-through cable to connect to these devices if you configure a port on your hub to the uplink mode.

You can configure port 1 on the BayStack 60-12T/60-24T 10/100 Ethernet Hub from normal to uplink mode with the MDI/MDI-X button.

Refer to “ Cable Types and MDI/MDI-X Modes” on page 3-3 for details regarding which cable or mode to use for specific devices.

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Contents Part No -A June Great America Parkway Santa Clara, CA Trademarks Copyright 1999 Nortel NetworksRestricted Rights Legend Statement of ConditionsIii Voluntary Control Council for Interference Vcci Statement Wichtige Sicherheitshinweise Nortel Networks NA Inc. Software License Agreement Vii Viii Contents Chapter Troubleshooting Figures Xii Tables Xiv Before You Begin PrefaceHow to Get Help Technical Solutions Center Telephone NumberHard-Copy Technical Manuals Chapter Introduction Product FeaturesProduct Description Autosense CapabilityFront Panel BayStack 60-12T Front Panel Color Activity Indication LED DescriptionsPort Partitioning Rear Panel Hardware and Environmental RequirementsMixed 10 Mb/s and 100 Mb/s Environment Chapter Typical ApplicationsExample of a Basic Mixed Network Basic Mixed NetworkExample of an Expanded Mixed Network Expanded Mixed NetworkDaisy-Chained Hubs BridgingPackage Contents Chapter InstallationMounting the Hub in a Standard 19 Equipment Rack Installing the HubConnecting the Hub To Other Devices Hub Port Connecting Device Mode Cable TypeCable Types and MDI/MDI-X Modes Connecting the Hub Through a RJ-45 Port Connecting the Hub Through the MDI Port Applying Power to the HubVerifying Port Status Port Status LED DescriptionsState Indication Verifying System Operations Chapter TroubleshootingDiagnosing Hub Indicators LED IndicatorsSymptom Cause Solution Appendix a Technical Specifications Table A-1 Product SpecificationsDescription Internal Switching Specifications Appendix B Cable and Connector Information Port AssignmentsRJ-45 Ports Table B-1 RJ-45 Pin Descriptions Cable AssignmentsIndex-1 IndexIndex-2

60-12T, 60-24T specifications

Nortel Networks 60-24T and 60-12T are both key components in the realm of networking, designed primarily for small to medium-sized businesses and institutions that require efficient and reliable telecommunications infrastructure. These products are part of Nortel’s broader suite of communication solutions and are known for their robust performance, ease of use, and flexible deployment options.

The Nortel 60-24T switch provides 24 Ethernet ports, allowing for the connection of multiple devices, such as computers, printers, and servers, all within a local area network. This model is particularly valued for its high-speed throughput and low latency, ensuring that data packets can be transmitted quickly and efficiently. With support for both 10/100 and gigabit Ethernet speeds, the 60-24T is adaptable to evolving network demands, making it a reliable choice for growing businesses.

On the other hand, the Nortel 60-12T model offers 12 Ethernet ports, tailored for smaller installations or as part of a larger network architecture. Its compact design does not compromise its performance, as it incorporates features like VLAN support, Quality of Service (QoS) capabilities, and advanced security protocols. These features aid in managing bandwidth allocation and protecting sensitive data, ensuring that critical business operations are maintained without interruption.

Both models utilize Nortel’s Intelligent Network architecture, which allows for simplified management and configuration of networking services. They support a variety of Ethernet standards, including IEEE 802.1Q for VLAN tagging, which enables users to segment their networks effectively, promoting better resource allocation and security.

Key characteristics include their fanless design in certain versions, ensuring quiet operation, along with energy-efficient capabilities that reduce overall power consumption. Additionally, they feature user-friendly interfaces that facilitate hassle-free setup and monitoring, making them suitable for IT teams with varying levels of expertise.

In summary, the Nortel Networks 60-24T and 60-12T switches stand out for their flexibility, robust feature set, and performance reliability. These attributes make them ideal solutions for any organization aiming to build or enhance their networking environment, addressing current needs while allowing for future growth.
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