5 – Diagnostics/Troubleshooting
Power-On Self Test Diagnostics
59096-04 A 5-7
A
5.2.2
Logged-In LED Indications
Port diagnostics are indicated by the Logged-In LED for each port as shown in
Figure 5-2.
Figure 5-2. Logged-In LED
The Logged-In LED has three indications:
Continuous illumination: A device is logged in to the port.
Flashing once per second: A device is logging in to the port, or the port is in
the diagnostics state.
Flashing twice per second: The port is down, offline, or an error has
occurred.
If a Logged-In LED is flashing twice per second, review the event browser for
alarm messages regarding the affected port. You can also inspect the alarm log
using the Show Alarm command. If there is an error, alarm messages may point to
one or more of the following conditions:
E_Port Isolation
Excessive Port Errors
AL A L AL
ALA
L
A
L
A
LA LALA
LA
LA LA
LA
LA
0
1
2
3
4
5
6 7 8 9 10 11 13 14 15
16
L
A
17
L
A
18
L
A
19
L
A
LA
12
Logged-In LED
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