Front Panel Leds - Cisco ESW2 Series Quick Start Manual

• Some SFP interfaces are shared with one other RJ-45 port, called a
combo port. When the SFP is active, the adjacent RJ-45 port is
disabled. Combo ports are indicated by the presence of a bar on the
panel that connects them, as shown in the following example:
• The LEDs of the shared RJ-45 port light to respond to the SFP interface
traffic.

Front Panel LEDs

Master (550 Series only)—(Green) Lights steady when this switch is a stack
master.
Fan—(Green) Lights steady when the cooling fan is operational, blinks
green if there is a failure.
System LED—(Green) Lights steady when the switch is powered on, and
flashes when booting, performing self tests, and acquiring an IP address. If
the LED flashes Amber, the switch has detected a hardware failure.
Stack ID (550 Series only)—(Green) Lights steady when this switch is
stacked and the corresponding number indicates its stack ID.
LINK/ACT LED—(Green) Located on the left of each port. The light is
steady when a link between the corresponding port and another device is
detected. Flashes when the port is passing traffic.
Gigabit LED (if present)—(Green) Located on the right of a GE port. Lights
steady when another device is connected to the port, is powered on, and a
1000 Mbps link is established between the devices. When the LED is off,
the connection speed is under 1000 Mbps or nothing is cabled to the port.
SFP (if present)—(Green) Located on the right of a GE port. Lights steady
when a connection is made through the shared port. Flashes when the port
is passing traffic.
Cisco ESW2 Series Advanced Switches 17