Non-Standard Cables; Topology; Unusual Network Activity - HP AdvanceStack J2610B Installation And Reference Manual

Troubleshooting

Non-standard Cables

Mis-wired cables may cause numerous network collisions, and can seriously
impair network performance. Before connecting cables into your network,
you should verify that they comply with the applicable standards. For a list
of compatible cables and a description of the pinouts for each port on the
hub (which can be used to confirm the compatibility of unlisted cables), see
appendix A, "Cables and Connectors".

Topology

It is important to make sure you have a valid network topology. Common
topology faults include excessive cable length and excessive repeater delays
between nodes. If you have trouble after recent changes to a network,
switch back to the previous topology. If you no longer have any trouble, the
new topology is probably at fault. Refer to the guide entitled Designing
HP AdvanceStack Networks for topology configuration guidelines. Contact
your HP-authorized LAN dealer or local HP sales office to get a copy of this
guide.

Unusual Network Activity

Network activity that exceeds accepted norms often indicates a hardware
problem with one or more of the network components, possibly including
the hub. Unusual network activity is usually indicated by the LEDs on the
front of the hub or measured with one of the diagnostic tools in the ASCII
console. Refer to "Diagnosing with LEDs" earlier in this chapter for
information on using LEDs to identify unusual network activity.
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