Label or Type Color/State Meaning
SECURE Steady blue Authentication complete
Very slow blinking blue
(0.25Hz)
Bypass authentication (debug only)
Fast blinking blue (4Hz) Authentication failed
Slow blinking blue (1Hz) Authenticating or updating images
Off Authentication begin or fault
RJ-45 Management Port LEDs
The 10/100/1000Base-T RJ-45 Management port includes two LEDs that are both amber
and green. The LEDs are located on each side of the RJ-45 port. The LED on the right
side is labeled Speed and the LED on the left side is labeled Link/Activity. The following
table describes the meaning of the colors and states for the LEDs.
Table 13: 10/100/1000Base-T RJ-45 Management Port LEDs
LED Color/State Description
Speed Off The port is operating at 10
Mbps.
Green The port is operating at 100
Mbps.
Amber The port is operating at
1000 Mbps.
Link/Activity Green The port has established
a link. There is no data
activity.
Blinking green The port has established
a link and there is data
activity.
Off The port has not
established a link.
QSFP28 Port LEDs
Each QSFP28 port has four??? green??? LEDs. The following table describes the states
for the LEDs.
Table 14: Front Panel System LEDs
Label or Type Color/State Meaning
PSU1, PSU2
(Power Supplies)
Steady green PSU is installed and providing power
Steady amber PSU is installed but input power is
disconnected or unit fault detected
Off PSU is not installed
RJ-45 Management Port LEDs Monitor the Switch
78 Extreme 7720 Hardware Installation Guide
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