INTRODUCTION
1-5
Speed Fault Protection
If a station attempts to inserting into the ring at a ring speed (4 or 16
mbits) different from what is set on the TRMIM, that port is
automatically bypassed to prevent the ring from beaconing. The
PEN
LED flashes indicating the port with the speed fault is
bypassed.
Multiple Concentrator Modules
Several concentrator modules can be installed into a single MMAC
and configured as independent rings or linked together into a
single ring network thru the FNB. Configuration guidelines can be
found in Chapter 3, Installing the Concentrator Module.
Multiple MMACs in a Ring Network
Several MMACs can be connected into the same ring network by
installing token ring concentrators (TRMIM-10R/20R with
externally accessible Ring-In/Ring-Out ports) or token ring
repeaters (TRRMIM-A/2A/4A). The choice between using
concentrators or repeaters depends on specific network
configurations. Refer to Cabletron Systems
TRMIM-10R/20R
Installation Guide
or
TRRMIM-A/2A/4A Installation Guide
for
more information on the use of these products or contact Cabletron
Systems Technical Support.
A variety of network management tools can be used to control and
monitor TRMIMs, including Cabletron Systems Local
Management, Remote LANVIEW/Windows™, and
SPECTRUM™.
Multi-Ring Out Capability
With this feature any port of the concentrator module may be set as
a ring-out port through the MMAC management module. In this
configuration a stand-alone passive concentrator (such as an IBM
8228) may be added to the ring as shown in Figure 1-2. This allows
