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FORE Systems ES-2810 Ethernet Switch User's Manual
Console Port Use and Troubleshooting
7.7.3 Communication Problems
7.7.3.1 The Most Common Problems are Cable Problems
A high percentage of faults are caused by cable faults such as loose connections or inappropri-
ately wired cables.
7.7.3.2 Spanning Tree Topology Changes
When a change is detected in the Spanning Tree network, the devices forming the Spanning
Tree go into a learning state to determine the optimal routes between network segments. Dur-
ing this learning state, the switch will not forward data traffic.
This is a normal occurrence for Spanning tree devices and no remedial action is required.
However, if the switch goes into the learning state too frequently, the Spanning Tree may be
unstable and should be examined and possibly reconfigured.
7.7.3.3 To Troubleshoot Communications Problems
If the POWER LED and the STATUS LED are both on, but one or more of the port STATUS LEDs
are off, then:
1. Reset the switch using the Reset button.
2. Check the STATUS LED for each switch port to which a cable is attached.
7.7.3.4 VLANs
The use of VLAN policies can lead to unexpected communication problems. If the policies are
not designed with care, ports are not able to reach network services. Check your VLAN poli-
cies and use the VLAN monitoring to review the VLAN membership for that port or address.
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