Troubleshooting Checklist - Cabletron Systems MicroMMAC-24E Installation Manual

5.2 TROUBLESHOOTING CHECKLIST

If your MicroMMAC is not operating properly, Table 5-1 describes some
of the problems that may occur, possible causes for the problem, and
suggestions for resolving the problem.
Problem
No LEDs on.
Cannot contact the
MicroMMAC from
in-band
management.
User-entered
parameters (IP
address,
Community Names,
etc.) are lost when
device is powered
down.
No power to an
external
transceiver
connected to an
EPIM-A.
High Number of
collisions on EPIM
ports.
MicroMMAC Installation Guide
Table 5-1 Troubleshooting Checklist
Possible Causes
Loss of Power.
Improper
Community Names
table.
MicroMMAC does
not have an IP
address.
No link to device.
NVRAM reset
switch has been
toggled and
user-entered
parameters have
been reset to the
factory default.
AUI cable may be
defective.
Transceiver may be
defective.
EPIM is defective.
External
transceiver has
SQE enabled.
Troubleshooting Checklist
Recommended Action
Check that the MicroMMAC
has adequate power.
Refer to the MicroMMAC Local
Management User's Guide for
Community Names Table setup
and IP address assignment
procedures.
Check the link to the
MicroMMAC.
See Chapter 2 for proper use of
the NVRAM switch.
If NVRAM is defective, call
Cabletron Systems Technical
Support.
Replace AUI cable.
Replace transceiver.
Replace EPIM.
Disable SQE.
Page 5-3