HP 620 - Manual (Page 25)

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Troubleshooting
This chapter describes how to troubleshoot the 620 RPS/EPS.
This chapter describes the following:
■ basic troubleshooting tips ( page 3-1 )
■ diagnosing with the LEDs ( page 3-2 )
■ diagnostic tests ( page 3-5 )
■ HP customer support services ( page 3-6 )
Basic Troubleshooting Tips
Most problems are caused by the following situations. Check for these items
first when starting your troubleshooting:
■ Faulty or loose cables. Look for loose or obviously faulty connections.
If the cables appear to be OK, make sure the connections are secure. If
that does not correct the problem, try a different cable.
■ Connection topologies. It is important to make sure you have a valid
connection topology. The 620 RPS/EPS can support two ProCurve PoE
devices on its EPS ports and two ProCurve switches can be connected to
RPS ports. Sample topologies are shown at the end of chapter two
page
2-11 in this book.
■ Power limitations . Be sure to understand the power limitations of the
620 RPS/EPS when connecting switches. An overload condition on a port
causes the port to be shut down.
N o t e Use caution when power cycling the 620 RPS/EPS as this may affect devices
receiving operating power from the unit.