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Chapter 1. An Overview of the IBM 8260 Hub
This chapter is an introduction to the IBM 8260 Multiprotocol Intelligent Switching
Hub. It is intended to provide the reader with an overview of the following:
•
Hardware description
•
Backplane architecture
•
Fault-tolerant power subsystem
•
Intelligent cooling subsystem
•
Distributed management architecture
•
Hot pluggability
•
Fault-tolerant controller module
•
Compatibility with the 8250 family
1.1 Introduction
The 8260 is an intelligent managed hub which provides the platform to build local
area networks using various types of cabling systems (such as STP, UTP, fiber
and coax) and different types of LAN protocols (such as token-ring, Ethernet, and
FDDI). Additionally, the 8260 provides platform for the implementation of
high-speed networks based on Asynchronous Transfer Mode (ATM) technology.
The 8260 is a rack-mountable hub and depending on the model it allows you to
install up to 17 payload
modules
. These modules can be a combination of media
and management modules providing you with the flexibility to design networks
addressing the individual needs of your organization.
Media and management modules can be installed or removed from the 8260,
while the hub is operational. This allows you to modify the configuration of the
network with minimal disruption to the users.
The 8260 provides the room to install up to two controller modules. The second
controller module will be used to provide backup for the primary controller
module.
In addition to a wide range of 8260 media and management modules which are
specifically designed to take advantage of the features offered by the new
chassis, the 8260 supports all of the media and management modules from the
8250 (but not its controller module). This provides you with the ability to protect
your investment in the 8250 modules.
Note: As the 8260 is taller than the 8250, an optional adapter kit is required to
install the 8250 modules in an 8260.
The 8260 is designed to be a stand-alone unit or to be mounted in a standard 19″
rack. The 8260 is shipped with a rack mounting kit, a rubber feet kit and a cable
tray assembly.
When you order the 8260, the following components will be included in the 8260
chassis which is shipped to you:
•
One controller module
Copyright IBM Corp. 1995 1