The port may be
Use the switch console to see if the port is part of a dynamic trunk (through the LACP
feature) or to see if Spanning Tree is enabled on the switch, and to see if the port may
have been put into a "blocking" state by those features. The show lacp command displays
the port may be in
the port status for the LACP feature; the show spanning-tree command displays the port
status for Spanning Tree.
state by the
Also check the Port Status screen using the show interfaces command to see if the port
has been configured as "disabled".
of the Spanning
Other switch features that may affect the port operation include VLANs and IGMP. Use
Tree, LACP, or
the switch console to see how the port is configured for these features.
For software troubleshooting tips, see the chapter "Troubleshooting" in the Management
and Configuration Guide, which is on the Documentation CD-ROM that came with your
Make sure also, that the device at the other end of the connection is indicating a good
link to the switch. If it is not, the problem may be with the cabling between the devices or
the connectors on the cable.
Diagnosing with the LEDs