Cabletron Systems NBR-420 - Manual (Page 43)

Chapter 4: Troubleshooting
Page 4-2 NBR-SERIES Installation Guide
Table 4-1 LANVIEW LEDs
LED Color Description
Error Condition/
Recommended Action
PWR Green Indicates that the
NBR is receiving
power. If OFF, check the input power
source (circuit breaker, fuse,
etc.).
CPU Multi-
Color
Green
Yellow
Red
Flashing Green,
indicates that the
NBR is operating
properly. If OFF, Red, or Yellow the
board has a problem.
Press the RESET button on
the NBR front panel to
re-initialize the board. If the
board does not re-initialize,
it has probably failed. Call
Cabletron Systems Technical
Support.
RECEIVE
A, B, C, D Yellow Light flashes to
indicate that a
segment is
receiving a frame. If none of the receive LEDs
are flashing, the NBR is not
receiving frames on any of
the segments.
Ensure that all connected
ports are enabled.
TRANSMIT
A, B, C, D Green Light flashes to
indicate that a
segment is
transmitting a
frame.
If not connected to
the LAN, the LED
flashes every two
seconds to indicate
it is transmitting
BPDU frames.
If none of the transmit LEDs
are flashing, the NBR is not
transmitting frames on any of
the segments.
Contact Cabletron Systems
Technical Support for
assistance.