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Hardware Reference 27
C613-03087-00 Rev E
AR770S LEDs and what they mean
The following table shows the functions of the AR770S LEDs. Additional LEDs
may be present if a PIC is installed. Functions of PIC LEDs are described in the
Port Interface Card Hardware Reference.
LED State Function
Status PWR Green The router is receiving power and is switched ON.
Status SYS Off Normal operation.
Amber Lit briefly during router startup, or when the router
system is malfunctioning.
Flashing
1 flash
3 flashes
6 flashes
There is a fault. To check the router’s fan speed,
temperature, and internal voltages, use the show
system command.
The router fan has failed.
There is an internal power supply fault in the router.
The router temperature is too high or too low. Put the
router in a location that will maintain an ambient
temperature range of 0 ºC to 50 ºC (32 ºF to 122 ºF),
with adequate airflow around the router and its vents.
Ethernet
SFP 0..1
L/A
Green The SFP Eth port has a 1000 Mbps link.
Green flashing Data is being transmitted or received.
Amber There is an SFP installed, but there is no link.
Amber flashing There is a transmission fault at this SFP port.
Ethernet
10/100/1000
0..1
L/A
Green The Eth port has a 1000 Mbps link.
Amber The Eth port has a 10 or 100 Mbps link.
Flashing Data is being transmitted or received.
Ethernet
10/100/1000
0..1
D/C
Green The Eth port is operating at full duplex.
Amber The Eth port is operating at half duplex.
Amber flashing There is a collision on the Eth port.
Switch Ports
10/100/1000
1..4
L/A
Green The switch port has a 1000 Mbps link.
Amber The switch port has a 10 or 100 Mbps link.
Flashing Data is being transmitted or received
Switch Ports
10/100/1000
1..4
D/C
Green The switch port is operating at full duplex.
Amber The switch port is operating at half duplex.
Amber flashing There is a collision.
PIC 0..1 Green A port interface card (PIC) is correctly installed and has
been detected by the router.