3Com SUPERSTACK II 2000 TR, Manual

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HAPTER
1: O
VERVIEW
TR-in-FE Benefits
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:
■
Scalability
■
TR switching
■
High-speed technologies
■
Wire-speed performance
■
Flexibility
■
High-speed flexibility (choice of D/L technology)
■
Desktop flexibility (TR, Ethernet)
■
Common high-speed infrastructure
■
Managability
■
Simple to configure and administer
■
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:
■
Preserving existing investments in TR infrastructure
■
Seeking low-cost, high-speed connectivity
■
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.