Cabletron Systems NBR-220 Troubleshooting Checklist, NBR-SERIES Installation Guide, Page, Problem

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

NBR-SERIES Installation Guide Page 4-5