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• For a combination port, the LEDs of the shared RJ-45 port light to
respond to SFP+ port traffic.
OOB (if present)—If present, the Out of Band (OOB) port is a CPU's
Ethernet port that can be used only as a management interface. Bridging
between the OOB port and the in-band Layer 2 interface is not supported.
Front Panel LEDs
RPS—(Green) Lights steady when the switch is ready and applicable for
power backup through the Cisco Redundant Power System 2300
(RPS2300), blinking when the power backing up is in process. If the LED
flashes Amber, the Cisco RPS2300 is used for other switch.
Fan—(Green) Lights steady when the cooling fan is operational. Flashes
Amber when both two fans have failures.
Master—(Green) Lights steady when the switch is a stack master.
System—(Green) Lights steady when the switch is powered on, and
flashes when booting, performing self-tests, or acquiring an IP address. If
the LED flashes Amber, the switch has detected a hardware failure, a
firmware failure, and/or a configuration file error.
Stack ID—(Green) Lights steady when the switch is stacked and the
corresponding number indicates its Stack ID. When a switch has a Stack ID
greater than 4, a combination of the LEDs will light up to add up to the
Stack ID. For example, Stack ID #5 is LED#1 and LED#4, Stack ID #8 will
show LED#1, LED#3 and LED#4.
LINK/ACT—(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.
XG—(Green) Located on the right of a 10G port. Lights steady when
another device is connected to the port, is powered on, and a 10 Gbps link
is established between the devices. When the LED is off, the connection
speed is under 10 Gbps or nothing is cabled to the port.
Gigabit—(Green) Located on the right of a Gigabit port or the OOB 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 10G port. Lights
steady when a connection is made through the shared port. Flashes when
the port is passing traffic.
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Cisco 550X Series Stackable Managed Switches Quick Start Guide
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