Topology; Unusual Network Activity; Ip Configuration Errors - HP AdvanceStack 10Base-T Hub-12 Installation And Reference Manual

Troubleshooting

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 Workgroup 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,
including, possibly, 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 HP Stack Manager. Refer to "Diagnosing with
LEDs" earlier in this chapter for information on using LEDs to identify
unusual network activity.

IP Configuration Errors

If you are using IP communications, make sure your IP configuration
parameters are set properly. Use the HP Stack Manager's IP
Configuration function. (This function is available only on hubs that
have an installed HP Ethernet SNMP Module.) Incorrect IP
configuration on the hub will prevent it from communicating with the
network management station, and may cause other network problems.
In particular, make sure you provide the hub with a unique IP address,
and that you use the correct subnet mask for your network. See
appendix D, "Network Addressing", for more information.
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