Cabletron Systems NBR-420 User Manual
Page 46
Troubleshooting Checklist
NBR-SERIES Installation Guide
Page 4-5
User parameters (IP
address, Device and
Module name, etc.) are
lost when device is
powered down.
NVRAM reset switch
has been toggled and
user-entered
parameters have been
reset to factory default.
NVRAM may be
defective.
See Chapter 3 for
proper use of the
NVRAM switch.
If NVRAM is defective,
call Cabletron Systems
Technical Support.
No power to an external
transceiver connected
to an EPIM-A.
AUI cable may be
defective.
Transceiver may be
defective.
EPIM is defective.
Replace AUI cable.
Replace transceiver.
Replace EPIM.
High number of
collisions on EPIM port.
External transceiver
has SQE enabled.
Disable SQE.
Port(s) go into standby
for no apparent reason.
Configurations where
devices connect across
NBR channels can
cause the NBR to
detect a looped
condition.
Discuss these
configurations with
Cabletron Systems
Technical Support
before implementing
them into your network.
Table 4-2
Troubleshooting Checklist (Continued)
Problem
Possible Causes
Recommended
Action