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Quick Install Guide 11
C613-04031-01 REV B
Switch Controller LEDs
The following LEDs will operate if the switch controller is receiving power.
The SwitchBlade Hardware Reference has further troubleshooting information,
including information on line card and power supply unit LEDs.
Table 1: LEDs on the AT-SB4211 Switch Controller.
LED State Function
Power Green The switch controller is receiving power
Master Amber The switch controller is the master controller
Off The switch controller is the slave controller
Fault Red The switch controller or management software is
malfunctioning
2 Flashes A fan-tray fan has failed
3 Flashes A PSU or PSU fan is malfunctioning
5 flashes The fan tray has been removed for more than 20
seconds
6 Flashes The switch’s internal temperature has exceeded
the alarm threshold
Slow flashing at
startup
The SDRAM (DIMM) has not been detected
Rapid flashing at
startup
The SDRAM (DIMM) is not compatible with the
switch
L/A
(Link/Activity)
Green A 100 Mbps management port link is open
Amber A 10 Mbps management port link is open
Flashing green 100 Mbps activity is occurring through the
management port
Flashing amber 10 Mbps activity is occurring through the
management port
D/C
(Duplex/
Collision)
Green The management port is operating at full-duplex
Amber The management port is operating at half-duplex
Flashing Collisions are occurring on the management port
link