SMC Networks 8606SX - annexe 2 User Manual page 89

U RMON
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Adding or Editing an Entry in the Control Table
Click on the Add (Edit) button in the History Control Table to add (edit) an index entry as shown
on the preceding page. Each interface equates to a physical media on the device being monitored.
This information can be found under MIB2 (see page 6-5). The number of buckets indicates the
number of samples to record. You should always be able to record the default of 50 buckets
without overflowing the agent's memory. However, if more than 50 buckets are requested, the
number actually granted will depend on the amount of memory currently available. Once all the
buckets are filled, older data will be discarded. You also need to specify the interval at which to
take samples. For example, using a 30 second interval with 120 buckets will provide one hour of
historical samples.
Viewing History
The RMON Manager collects historical information on bandwidth utilization, packet types, errors and
collisions, as well as the distribution of packet sizes for each entry you define. Each sample shows
the interval's start time. The information collected during the interval is displayed in both numeric
and graphic format for easy interpretation.
To display the history for a specific entry, highlight that entry in the Control Table and click on the
View button. The various history screens are shown below. The scale for the graphic displays are
automatically adjusted to present the best view possible. If necessary, you can reduce the polling
interval to focus in a specific problem, or increase it to reduce overall management traffic running
on the network.
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