Cabletron Systems SEH-22 - Manual (Page 42)

CHAPTER 5: TROUBLESHOOTING
5-2 SEH USER’S GUIDE
2. If the remote station is ready and the LNK LED is on, but no data
passes through the port, one of two conditions may exist:
• Network management has disabled the port.
• The port is segmented either because the collision detector was on
for more than 110
µ
s or the SEH detected more than 32
consecutive collisions on the attached segment. The affected port
remains segmented until a good packet is transmitted/received
without collisions.
If the LNK LED is still not on, contact Cabletron Systems Technical
Support.
5.2 USING LANVIEW
The SEH incorporates the Cabletron Systems LANVIEW Status
Monitoring and Diagnostics System. LANVIEW LEDs help diagnose
problems such as a power failure or a cable fault. The SEH includes the
following LANVIEW LEDs:
• PWR, for power status
• MGMT, for management status
• RCV (Receive), LNK (Link), and CLN (Collision) for Ethernet
status.
Figure 5-1 provides a quick reference chart of LED locations and
definitions. This chapter also includes a detailed description of each LED.
SEH Book Page 2 Tuesday, March 19, 1996 4:12 PM