Справочник Пользователя для 3com 2000 TR

 

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VERVIEW

 

Increasingly, Token Ring users are deploying switches 
to segment their networks and to increase available 
bandwidth to their workgroups. This has resulted in a 
demand for more server bandwidth as well as 
high-speed aggregation and switching. Previously, 
those users wanting their Token Ring server band-
width increased beyond 32 Mbps faced limited 
options. They could add either FDDI or ATM down-
links to their Token Ring switches–options that proved 
costly and complex. The Token Ring-in-Fast Ethernet 
(TR-in-FE) system offers a new, simpler option at a 
much lower cost. TR-in-FE offers improvement in the 
following areas:

 

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Scalability

 

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TR switching

 

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High-speed technologies

 

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Wire-speed performance

 

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Flexibility

 

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High-speed flexibility (choice of D/L technology)

 

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Desktop flexibility (TR, Ethernet)

 

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Common high-speed infrastructure

 

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Managability

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Simple to configure and administer

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Cost effective

TR-in-FE allows both Token Ring and Ethernet to 
share the same Fast Ethernet physical wiring infra-
structure and server base without impacting network 

performance. TR-in-FE accomplishes this by introduc-
ing routing or Source-Route to Transparent transla-
tional bridging.

Fast Ethernet is relatively well understood and easy to 
configure. The TR-in-FE operates in both copper or 
fiber optic environments. Additionally, many tools 
exist to manage and administer Fast Ethernet due to 
its wide acceptance in the industry and its similarity to 
Ethernet.

TR-in-FE benefits those MIS managers most interested 
in:

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Preserving existing investments in TR infrastructure

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Seeking low-cost, high-speed connectivity

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Combining Ethernet and Token Ring for common 
server access

Fast Ethernet is less expensive than other options, 
such as FDDI and ATM. Using FE, the price per port 
for server attachment is 20% that of ATM and FDDI.

TR switching allows the install base of TR equipment 
and its configuration to remain intact and operational 
while allowing for an upgrade to higher performance 
through microsegmentation and interfaces to higher 
speed technologies. TR-in-FE represents one option 
for integrating Fast Ethernet into the TR switched 
environment.