Intel Express 510T, User Manual

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681872.bok : 68187207 85 Mon Apr 20 15:35:05 1998
Typical Problems and Causes
Troubleshooting
85
Performance Problems
One or more workstations cannot communicate with a server or other device through the
switch
Explanation:
This symptom might be noticed on one or more seg-
ments connected to the switch, and could be caused by cable faults,
inappropriate configuration or faulty installation.
Action:
: Check all connections and verify your configuration.
The 100Mbps ports are not working, or work very poorly
Explanation:
This is probably due to incorrect configuration of the
auto-negotiation duplex settings and link speeds.
Action:
Check the negotiated settings in the switch and compare
them to the expected values.
I have poor performance and high numbers of 2nd port drops
Explanation:
There may be a loop in the network and Spanning
Tree is not enabled.
Action:
Either enable STP on all the ports (using
Device Setup
)
or specific ports (using
Port Setup
).
Communication Problems
The most common
problems are cable
problems
A high percentage of faults are caused by cable faults such as loose
connections or inappropriately wired cables. Cable faults are easily
remedied but can be awkward to track down, so you need a disci-
plined and methodical approach.
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. During this learning state,
the switch will not forward data traffic.
This is a normal occurrence for Spanning tree devices and no reme-
dial action is required. However, if the switch goes into the learning
state too frequently, the Spanning Tree maybe unstable and should be
examined and possibly reconfigured.