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This chapter describes how to use the front panel LANVIEW LEDs to
troubleshoot physical layer network problems.
5.1 USING LANVIEW
LANVIEW is Cabletron Systems built-in visual diagnostic and status
monitoring system. You can quickly scan the LANVIEW LEDs to
observe network status or diagnose network problems, and determine
which node or segment is faulty. Figure 5-1 shows the location and
provides a brief definition of each LED. A detailed description of each
LED follows Figure 5-1.
MicroMMAC-24E
DISPLAY
LED NAME
PWR
(Power)
CPU
(Central Processing Unit)
CLN
(Collision)
RCV
(Receive)
LNK
(Link)
MicroMMAC Installation Guide
CHAPTER 5
TROUBLESHOOTING
10BASE-T HUB
RESET
COM 2
COM 1
LED COLOR
Off
Green (Solid)
Off
Green (Flashing)
Green (Blinking)
Red (Solid)
Orange (Blinking)
Red
Off
Yellow (Flashing)
Off
Green
Off
Figure 5-1 LANVIEW LEDs
LANVIEW
R
WITH
RCV
LNK
21 20
24 23
22
PWR
RCV
CPU
CLN
LNK
12
11 10
9
DEFINITION
No Power
Power
CPU in BOOT Process
CPU Initializing
CPU Functioning
CPU Not Functioning
Ethernet Interface in stand-by condition
Collision
No Collision
MicroMMAC is Receiving Data
No Activity
Link Established
No Link
19 18 17
16 15 14
13
8
7
3
2
1
6
5
4
090817
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2
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Troubleshooting
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