18 Publication 1783-UM002C-EN-P - April 2009
Chapter 1
Expansion Module Status Indicators
State Description
Off No link.
Solid green Link present.
Flashing green Activity. Port is sending or receiving data.
Flashing amber A link blocked by spanning tree is sending or receiving data.
Alternating
green/amber
Link fault. Error frames can affect connectivity, and errors such as excessive collisions, CRC errors, and alignment and
jabber errors are monitored for a link-fault indication (RJ45 connection only).
Solid amber Port is not forwarding. Port was disabled by management, an address violation, or spanning tree violation.
After a port is reconfigured, the port status indicator can remain amber for up to 30 seconds while spanning tree checks
the network for possible loops.
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