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Hardware Reference 15
C613-03087-00 Rev E
AR745 LEDs and what they mean
Functions of the AR745’s LEDs are shown in the following table. Additional
rear panel LEDs may be present if a PIC or NSM is installed. Functions of PIC
and NSM LEDs are described in their respective Hardware References.
1. AT-AR021 (S) BRI-S/T, AT-AR021 (U) BRI-U, AT-AR022 ETH, AT-AR023 SYN, and AT-AR026 4ETH PICs can be hot swapped.
The AT-AR745 router automatically monitors its own power supply and fan,
and has the option of a redundant power supply. If a redundant power supply
(RPS) is attached, the AT-AR745 software can detect the presence of the RPS
and the state of its output voltages and fan. RPS monitoring, turned off by
default, can be turned on or off using the command:
set system rpsmonitor={on|off}
LED Function
Front panel Rear panel
ETH
These LEDs give indications about the Ethernet interfaces.
LNK/ACT Lit green when the Ethernet interface is connected to a device (e.g., a hub) which is
generating link pulses. Lit yellow indicates transmission or reception activity.
100M Lit when the Ethernet interface is in 100 Mbps mode.
PIC0/PIC1 Lit when a PIC is inserted in either PIC bay 0 or PIC bay 1 (one LED for each PIC).
BASE
These LEDs indicate the state of the main router unit.
Power PWR Lit when power is supplied and the router is switched on.
Run RUN Lit when the internal processor is executing code. If the processor stops for any reason
(a fault condition), then the LED will not be lit.
System SYS Lit when the router or management software is malfunctioning. Flashes to indicate fan,
PSU, and RPS faults.
1 Flash: A router fan has failed.
2 Flashes: If an RPS is connected and RPS monitoring is enabled, an RPS fan has failed.
3 Flashes: If an RPS is connected, the router’s PSU (Power Supply Unit) has failed.
4 Flashes: If RPS monitoring is enabled, the RPS PSU has failed.
5 Flashes: If RPS monitoring is enabled, an RPS is not connected or is not operational
Security SEC Lit when a user is logged in with SECURITY OFFICER privilege and the router is in
SECURITY MODE.
Activity
(Compact Flash)
Lit when the compact flash card is accessed.
Do not remove the compact flash card when the LED is lit.
ENGINE
These LEDs give indications about a PCI Accelerator Card (PAC), which can be installed
for encryption and/or compression purposes.
ACT Lit when a PAC is installed in the PAC slot.
DAT Lit when data is transferred to or from the PAC.
ERR Lit when there is an error in the data transmission to or from the PAC.
Clear CLR Lit when a secure router has enabled PPP interfaces or Frame Relay circuits that are
configured to send clear text.
NSM
These LEDs give indications about an NSM installed in the router.
Swap Lit when the NSM and its PICs are powered down and can be hot swapped. Only lights
if the Hot Swap button has been pressed and the software version supports hot
swapping
1.
In Use Lit when an NSM is correctly installed. If the software version supports hot swapping,
it indicates that the NSM and its PICs are powered up and may not be swapped.