Black Box LR5100A-T - Manual (Page 19)

Applications
11
Identify the Status LEDs
The four three colour Light Emitting Diodes (LEDs) on the front of the router are depicted
in Figure 1-1. The meanings of these LEDs are found in the following chart.
Off Bridge/Router is powered down
Green Bridge/Router is running and has passed power-up diagnostics
Green (flashing) Bridge/Router is in BOOT mode and is programming the flash
Red Bridge/Router is powered up but has failed power-up diagnostics
Yellow (flashing) Bridge/Router is in BOOT mode
POWER
Off Module is not installed
Green Module is connected and forwarding
Yellow
LAN is connected and NOT forwarding:
i.e. Listening, Learning, or Blocking
Red Bridge/Router is NOT connected to the LAN
LAN
Off Module is not installed or is configured to be down: Disabled.
Green Connection is up* / LAN 2 connected and forwarding
Yellow
LINK is negotiating in ISDN. LINK is auto-learning LMI type
in Frame Relay. Not used in Leased Line or LAN mode
Red
Software failure (if WAN module installed)
LAN 2 not connected (if LAN2 module installed)
LINK 1/LAN 2
Off Module is not installed or is configured to be down: Disabled.
Green Connection is up*
Yellow
LINK is negotiating in ISDN. LINK is auto-learning LMI type
in Frame Relay. Not used in Leased Line mode
Red Software failure
LINK 2
*If the module is an ISDN BRI interface, a connection on either B-channel will display a
green LED.