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The network is experiencing one or more of the following failure symptoms: The whole network is operating slowly; a specific network application is operating slowly; or logon failures are occurring.

First, set up the protocol analyzer or network monitoring tool to monitor the network bandwidth utilization at an overall baseline view.

Is the overall network baseline within normal operating levels of a previously established baseline for your network?

If you do not have a previously established baseline for your network, attempt to identify that a reasonable portion of the available maximum bandwidth is still available for use.

Vector back to the Protocol Analysis Menu and follow the subsections of this complete section. (That is, examine the low-layer frame communication processes, check for specific Ethernet errors on the network and examine the high-layer network frame communication processes.)

Check the overall baseline network bandwidth as to individual Ethernet station nodes and all other network components' level usage. Attempt to locate a particular Ethernet station node or other network component that may be absorbing abnormal bandwidth.

Can you locate any particular Ethernet station nodes or other network components that may be absorbing abnormal bandwidth?

If you have not troubleshot the high-level communication process on the segment, thoroughly troubleshoot the high-level communication process for any NOS or application communication processes that may be absorbing abnormal bandwidth . After analyzing the high-layer communication process, come back to this page and remeasure the baseline network bandwidth. If you have troubleshot the high-level communication processes, go to the next step.

Even though you cannot specifically locate any particular Ethernet station nodes or other network components that may be absorbing abnormal bandwidth, still check any Ethernet station nodes or network components that are suspect by going to the procedures for that particular specific network component (for example, Ethernet Station Node , Network Peripheral , File Server and so on).

If you are not completely sure that a specific network component is related to the failure symptom, go to the Ethernet Segment Problem Menu and troubleshoot the respective segment areas on the Ethernet internetwork associated with high bandwidth usage. If after going to the respective fault domain, network area or network component you find a problem, resolve the problem and retest the segment by going back to the Protocol Analysis Menu ; then come back to this page. Rerun another baseline bandwidth test session to reexamine the segment for bandwidth usage.

If everything appears normal, record the problem in the network maintenance and service log. If the problem is still present, contact your NOS and software support channel for assistance with troubleshooting any suspected network bandwidth issues.

If you have benchmarked the network bandwidth utilization and overall baseline view and usage of the individual Ethernet station nodes and other network components, and you still have a bandwidth problem that you cannot locate, contact your NOS and software support channel for assistance with troubleshooting any suspected bandwidth problem.

November 15, 1996