EMC DS-4900B User Manual

Interpreting LED activity
3-5
Operating the DS-4900B
Port Status No light No signal or light carrier (media or
cable) detected.
Check transceiver and cable.
Slow flashing green
(flashing in 2-second
intervals)
Port is online but segmented because of
a loopback cable or incompatible switch
connection.
No action required.
Fast flashing green
(flashing in
half-second
intervals)
Port is online and an internal loopback
diagnostic test is running.
No action required.
Flickering green
(steady with random
flashes)
Port is online and frames are flowing
through the port.
No action required.
Steady green Port is online, but has no traffic. No action required.
Slow flashing amber
(flashing in 2-second
intervals)
Port is disabled (because of diagnostics
or the portDisable command).
Verify that the diagnostic tests are not
running. Reenable the port using the
portEnable command.
Fast flashing amber
(flashing in
half-second
intervals)
Port is faulty. Check the management interface and
the error log for details on the cause of
status.
Contact your EMC Customer Service
Representative.
Steady amber (for
more than 5
seconds)
Port is receiving light or signal carrier at
4 Gbit/sec; but is not yet online.
No action required.
Table 3-1 Port side LED patterns during normal operation (continued)
LED name LED color Status of hardware Recommended action

EMC DS-4900B Specifications

General

Brand	EMC
Model	DS-4900B
Category	Switch
Language	English