Creating RMON history characteristics using EDM

You can use RMON to collect statistics at intervals. For example, if you want to gather RMON statistics over the weekend, you must configure enough buckets to cover two days. To do this, set the history to gather one bucket each hour, covering the 48-hour period. After you set history characteristics, you cannot modify them; you must delete the history and create another one.

Perform this procedure to establish a history for a port and set the bucket interval.

Procedure steps


Step Action

1

From the navigation tree, double-click Rmon.

2

In the RMON tree, double-click Control.

3

In the work area, click Insert to open the Insert History dialog.

4

Type the port number or click the ellipsis to select a port from the list.

5

In the Buckets Requested box, type the number of buckets, or click the ellipsis to select a value from the list. The default value is 50.

6

In the Interval box, type the length of the interval or click the ellipsis to select a value from the list. The default value is 1800.

7

In the Owner box, type the owner— the network management system that created this entry.

8

Click Insert to add the entry to the list and return to the History tab.

RMON collects statistics using the index, port, bucket, and interval that you specified.


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Variable definitions

Use the data in the following table to help you create the RMON history characteristics.

Variable Value
Index A unique value assigned to each interface. An index identifies an entry in a table.
Port Any Ethernet interface on the device.
BucketsRequested Specifies the requested number of discrete time intervals over which data is to be saved in the part of the media-specific table associated with this entry.
BucketsGranted Indicates the number of discrete sampling intervals over which data is saved in the part of the media-specific table associated with this entry. The actual number of buckets associated with this entry can be less than the value of this object. In this case, at the end of each sampling interval, a new bucket is added to the media-specific table.
Interval Specifies the interval in seconds over which the data is sampled for each bucket in the part of the media-specific table associated with this entry. You can set this interval to any number of seconds between 1 and 3600 (1 hour). Because the counters in a bucket can overflow at their maximum value with no indication, note the possibility of overflow in any of the associated counters. Consider the minimum time in which any counter could overflow on a particular media type and set the historyControlInterval object to a value less than this interval. This minimum time is typically most important for the octets counter in any media-specific table. For example, on an Ethernet network, the etherHistoryOctets counter could overflow in about 1 hour at the maximum utilization of the Ethernet.
Owner Specifies the network management system that created this entry.