Fddi Configurations; Corebuilder 2500 System Connection To An Fddi Dual Ring - 3Com CoreBuilder 2500 Getting Started Manual

FDDI Configurations
You can install your system into many FDDI
configurations. Figures in this section present logical
diagrams that illustrate the flexibility of the two
FDDI modules available for the CoreBuilder 2500
system. Only the most common configurations are
presented. Your configuration may have many more
devices than shown in the following examples.
Three node types are used to describe FDDI station
configurations and topologies. These node types
and their abbreviations are given in
Table 4-2 provides the abbreviations for the port
types used in the FDDI illustrations. See your
CoreBuilder 2500 Operation Guide for more
information about FDDI station configurations.
Table 4-1 Node Types and Abbreviations
Node Type
Single MAC-Dual Attachment Station SM-DAS
Dual MAC-Dual Attachment Station
Single Attachment Station
Table 4-2 Port Types and Abbreviations
Port Type
A port
B port
Master port
Slave port
Table 4-1.
Abbreviation
DM-DAS
SAS
Abbreviation
A
B
M
S
CoreBuilder 2500 System Connection to an FDDI
Dual Ring
Figure 4-20 shows CoreBuilder 2500 systems
attached to the FDDI dual ring. The connection to
the dual ring is made by the A and B ports on the
FDDI module. FDDI DAS modules, excluding
concentrators, may be attached to the dual ring, as
shown. Each CoreBuilder 2500 system shown has a
second FDDI module installed to enable additional
FDDI connections to servers and other CoreBuilder
systems.
3Com recommends that you connect equipment
that can be powered on and off, such as
workstations, only through concentrators. For
intermediate systems that are seldom powered off,
such as bridges and routers, connect them to the
FDDI dual ring only if they are equipped with an
optical bypass switch. These precautions protect the
integrity of the dual ring.
FDDI Modules 4-19