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Cisco Network Modules Hardware Installation Guide
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Chapter 18 Connecting Cisco EtherSwitch Service Modules
Cisco EtherSwitch Services Modules
Port LEDs in Stack Mode
The port LEDs in Stack mode show the stack member number of the Cisco StackWise EtherSwitch
service modules in the stack. Up to nine service modules or switches can be members of a stack.
Therefore, only the first nine port LEDs are used in Stack mode to reflect stack membership.
For example, you have a stack of three EtherSwitch service modules. Their stack member numbers are
3, 4, and 8. If you select the Stack mode on member number 8, then port 8x flashes green. Ports 3x and
4x display continuous green, showing you have two other stack members whose member numbers 3 and
4. All other LEDs are off since there are no other members in the stack. (See
Figure 18-7
.)
LINE PWR
Off
PoE mode is not selected. None of the 10/100 or 10/100/1000 ports
have been denied power or are in a fault condition.
Green
PoE mode is selected, and the PoE status is shown on the port LEDs.
Blinking
amber
PoE mode is not selected. At least one of the 10/100 or 10/100/1000
ports has been denied power, or at least one of the 10/100 or
10/100/1000 ports has a PoE fault.
Table 18-8 Port LED on the Cisco EtherSwitch Service Modules (Excluding the Cisco StackWise
EtherSwitch Service Module)
Port LED Color
Description
Off
No link, or the port was administratively shut down.
On PoE ports, no inline powered device (PD) detected, or the port is not
connected.
Green
A link is present. The port or system is functioning normally.
On PoE ports, the Cisco EtherSwitch service module is providing power to a PD.
Flashing green
Activity is occurring. The port is transmitting or receiving data. Module POST is
in progress.
Alternating
green-amber
Link fault.
On PoE ports, the Cisco EtherSwitch service module is denying power to a PD,
or is experiencing a power delivery fault.
Amber
The port is blocked by the Spanning-Tree Protocol (STP) and is not forwarding
data.
Note
After a port is reconfigured, the port LED can remain amber for up to
30 seconds.
On a PoE port, indicates that the port is denied power and that the port is
administratively disabled.
The system is receiving power but is not functioning properly.
Flashing amber
The port is blocked by STP and is transmitting or receiving packets.
On a PoE port, indicates an inline power delivery fault.
Table 18-7 Port LEDs on the Cisco StackWise EtherSwitch Service Module (continued)
Port Mode
Port LED
Color
Meaning