HP 2920 Installation And Getting Started Manual page 18

Introducing the HP 2920 Switches
Fronts of the Switches
Switch LEDs State
LED Mode For switches in a stack, the LED mode indications are the same as for standalone switches (see Table
indicator 1-3), but all the switches in the stack are coordinated and all show the same LED mode. See the Stacking
(green) Note under "LED Mode Select Button and Indicator LEDs" on page 1-11.
Mdl (Module On
Status,
green/
orange)
Blink
orange*
Fast blink
orange**
†
Off
Stacking Cmd on
Status
(green/
Cmd blink
orange)
green
†
Cmd off
Stk on
Stk blink
green
Stk blink
orange*
†
Stk off
* The blinking behavior is an on/off cycle once every 1.6 seconds, approximately.
** The fast blinking behavior is an on/off cycle once every 0.5 seconds, approximately.
†
If the Save Power LED feature is configured for the switch (savepower led command), then all LEDs except the Power
LED may be off.
1-10
Table 1-4. Stacking-Related Switch and Port LED Behavior
Meaning
A Stacking Module and/or one or more 10G Expansion Modules is installed into the
expansion slots in the back of the switch and is operating correctly.
A Stacking Module or 10G Expansion Module is plugged into a module slot but has
experienced a fault (including port or transceiver faults), or the stacking cable is not
connected correctly or has experienced a fault (if using the Stacking Module).
The Stacking Module or a 10G Expansion Module has been installed while the switch
was powered on (hot swapped) and the switch needs to be rebooted to support the
module.
No modules are installed into the module slots in the back of the switch.
This switch is a Commander of a stack.
This switch is becoming a Commander of a stack, or if Usr LED mode is selected,
indicates which switch is the Standby in the stack.
The switch is not the Commander of the stack.
The switch is a member of a stack.
The switch is joining a stack.
A stacking cable is disconnected or faulty, or is connected to a failed or powered off
switch. The Mdl LED may also be blinking orange simultaneously.
Stacking has been disabled.