18-11
Cisco Network Modules Hardware Installation Guide
OL-2485-20
Chapter 18 Connecting Cisco EtherSwitch Service Modules
Cisco EtherSwitch Services Modules
Port LEDs
Each port has a port LED. These port LEDs, as a group or individually, display information about the
module and about the individual ports.
Table 18-7
explains how to interpret the port LED colors in different port modes on the Cisco StackWise
EtherSwitch service module.
Table 18-8
explains how to interpret the port LED colors for link status on the Cisco EtherSwitch service
modules.
Table 18-7 Port LEDs on the Cisco StackWise EtherSwitch Service Module
Port Mode
Port LED
Color
Meaning
STAT
(default mode)
Off
No link, or the port was administratively shut down.
Green
A link is present.
Flashing
green
Activity is occurring. The port is transmitting or receiving data.
Alternating
green-amber
Link fault. Error frames can affect connectivity, and errors such as
excessive collisions, Cyclic Redundancy Check (CRC) errors, and
alignment and jabber errors are monitored for a link 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 while STP checks the Cisco StackWise
EtherSwitch service module for possible loops.
Flashing
amber
The port is blocked by STP and is transmitting or receiving packets.
DUPLX
Off
The port is operating in half-duplex mode.
Green
The port is operating in full-duplex mode.
SPEED
10/100 and 10/100/1000 ports
Off
The port is operating at 10 Mbps.
Green
The port is operating at 100 Mbps.
Flashing
green
The port is operating at 1000 Mbps.
SFP ports
Off
The port is not operating.
Green
The port is operating at 1000 Mbps.
STACK
Off
No stack member corresponds to that member number.
Flashing
green
Member number of the selected Cisco EtherSwitch service module.
Green
Member number of other stack member Cisco EtherSwitch service
modules.