Cabletron Systems NBR-220 Troubleshooting, Page, NBR-SERIES Installation Guide, 1 LANVIEW LEDs

Chapter 4: Troubleshooting

Table 4-1 LANVIEW LEDs

LED	Color	Description	Error Condition/
			Recommended Action
PWR	Green	Indicates that the	If OFF, check the input power
		NBR is receiving	source (circuit breaker, fuse,
		power.	etc.).
CPU	Multi-	Flashing Green,	If OFF, Red, or Yellow the
	Color	indicates that the	board has a problem.
		NBR is operating
	Green	properly.	Press the RESET button on
			the NBR front panel to
	Yellow		re-initialize the board. If the
			board does not re-initialize,
	Red		it has probably failed. Call
			Cabletron Systems Technical
			Support.
RECEIVE	Yellow	Light flashes to	If none of the receive LEDs
A, B, C, D		indicate that a	are flashing, the NBR is not
		segment is	receiving frames on any of
		receiving a frame.	the segments.
			Ensure that all connected
			ports are enabled.
TRANSMIT	Green	Light flashes to	If none of the transmit LEDs
A, B, C, D		indicate that a	are flashing, the NBR is not
		segment is	transmitting frames on any of
		transmitting a	the segments.
		frame.
		If not connected to	Contact Cabletron Systems
		the LAN, the LED	Technical Support for
		flashes every two	assistance.
		seconds to indicate
		it is transmitting
		BPDU frames.

Page 4-2 NBR-SERIES Installation Guide