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Cisco Catalyst Blade Switch 3120 for HP Hardware Installation Guide
OL-12246-01
Chapter 1 Product Overview
Other Features
Stack Master LED
The Stack Master LED (MSTR) shows the stack master status. Table 1-3 lists the LED colors and their
meanings.
Stack Member LED
The Stack Member LED (MMBR) shows the switch stack membership number, which ranges
from
1 to 9. The Stack Member LED blinks a number of times equal to the membership number of the
switch, pauses, and then repeats the process until you turn off stack mode or until stack mode times out.
Table 1-4 lists the LED colors and their meanings when stack mode is on. When stack mode is off, the
Member LED is off.
UID and Health LEDs
The UID and Health LEDs are controlled by the blade enclosure software (Onboard Administrator). The
UID LED is on when the switch module is identified by the blade enclosure. The Health LED is green
during normal operation; it is amber when a failure is detected.
RJ-45 Uplink Port LEDs
The external 10/100/1000BASE-T copper Gigabit Ethernet uplink port LEDs display link and activity
information about each individual port. These LEDs are on the top left and right, respectively, of each
RJ-45 port (see item 9 in
Figure 1-1 on page 1-2). Table 1-5 describes the port link LED colors and their
meanings.
Table 1-3 Stack Master LED
Color Description
Off Switch is not the stack master.
Green Switch is the stack master or a standalone switch.
Amber An error occurred during stack master election or another type of stack error occurred.
Table 1-4 Member LED With Stack Mode On
Color Description
Off Pause between blinking stack membership number. Duration is 5 seconds. After
pause, LED changes to blinking green.
Blinking green A total of n on-off cycles with n = switch stack membership number in range 1 to 9.
After n on-off cycles, blinking stops, and LED turns off.
Table 1-5 Meaning of Port Link LED Colors
LED Color Meaning
Off No link established.
Solid green Link established, no activity.
Blinking green Traffic on an established link.