What To Do When A Lit Amber Led Is Detected; Hierarchy Of Leds And Sounds - Nortel Passport 15000 Hardware Description

What to do when a lit amber LED is detected

When a lit amber LED is detected on a card, there is no traffic running on it.
After powering up a card, amber indicates a startup mode. Wait for the LED
on the card to change from amber to green or red. For a card that was
previously operating normally (the LED was solid green), amber indicates the
card has received new software. Either the software is invalid for that card, or
the card is must be replaced with a compatible type or version of card.
See the appropriate replacement procedure for the type of card.

Hierarchy of LEDs and sounds

A lit red LED or an audible alarm always indicates a critical problem. A part
with a lit red LED must always be addressed before a part with a lit amber
LED. When more than one critical problem occurs, some parts must be
addressed before others so that the impact of out-of-service parts is
minimized and further problems are prevented. The sequence of fixing
depends on:
• how the ambient temperature of the room affects the capability of the
remaining fans to keep the switch nominally cool
• whether the switch has an in-service redundant spare to back up the failed
part (for example, a fabric, a CP, an FP, a PIM, a BIM)
• whether the replacement part is readily available for the switch
For example, in a hypothetical scenario with a Passport 15000 or 20000 that
is redundantly configured when there is a relatively simultaneous failure of a
load-sharing fabric, the active CP, an unspared FP, and a fan fail in a room at
35 degrees Celsius (95 Fahrenheit), the sequence of repair is:
1 the fan, because determining whether the failure is the fan or its
controller and replace it is the longest maintenance task; meanwhile the
ambient temperature inside the switch will rise towards the point when
another part can fail or have service degradation
2 the fabric, because although its failure triggered an automatic takeover of
its load by the mate fabric thereby maintaining service, losing a fabric
while there is no backup effectively causes the entire switch to be out of
service
Chapter 7 Using status indicator LEDs and sounds 345
Passport 15000, 20000 Hardware Description 5.2S2