Allied Telesis AT-8126XL - Manual (Page 38)

Troubleshooting
3-4
How the Switch Reports Problems
The switch detects and processes errors as follows:
" The LEDs indicate problems with the port and power.
Table 3-1 describes the switch LEDs.
" In a TCP/IP environment, if you have configured the software
correctly, the management software triggers an SNMP trap
message. As a result, the software then sends traps to alert the
network manager when a trigger occurs. This type of software
configuration allows the network administrator to pro-
actively monitor their network.
Table 3-1 lists and describes the switch LEDs.
Table 3-1 Switch LEDs
LED Color State Description
Power (system) Green On The switch is receiving power, voltage is within
the acceptable range, and the power supply is
working.
Off No power.
Fault (system) Red On The switch or management software is
malfunctioning.
Flashing The switch is booting, running diagnostics,
writing images to FLASH, or transferring files via
XMODEM.
Off Normal operation.
Link/Receive
(port, top row) Green On There is a physical link with a device.
Flashing The port is receiving packets.
Off No link.
100 M
(port, bottom row) Amber On The port is operating at 100 Mbps.
Off The port is operating at 10 Mbps.