RMON Group 2, History
You can enter this window from:
1. Main Menu Bar (under "Monitor")
2. From some devices menu bar windows.
Information presented in the window:
History Control Table (upper part). The table presents control entries for RMON Group 2 (History).
Every interface may have several corresponding entries in this table (usually two entries per interface) . This table may contain entries for all the device interfaces , but may be empty as well.
If this table is empty , it may mean:
a) RMON Group 2 is not supported for this device.
b) RMON Group 2 is supported but there are no control entries. You may create an entry for
any interface by clicking on the Create button. The "Add RMON Group 2 ......" Window will be opened. You will be required to enter some information which describes how to collect statistics history :
1. Desired interface number.
2. Owner String : just a string to Identify the entry owner (usually not important)
3. Number of Buckets : The requested number of discrete time interval over which data will be collected . It is actually number of samples. It is not recommended to be more than 50. When the number of buckets reaches the value , the oldest bucket will be deleted so that the new bucket will be added.
4. Interval : The interval in seconds over which the data is sampled for each bucket. This interval can be set to any number of seconds between 1 and 3600 (1 hour)
Press OK in the "Add RMON Group 2 ..." Window. If Create operation fails, it may mean that RMON Group 2 is not supported for this device (see a))
Click on the Delete button will delete the selected control entry .
History Table (lower part). The table contains History information for one interface. This information corresponds to the currently selected entry in the Control Table (see above) . In order to change entry or/and interface , just click on the desired entry in the Control Table. After data retrieving, History Table will be filled with the corresponding information. Every History Table line corresponds to one sample (bucket) and includes:
1. Time : Start Time of the interval over which the sample was measured.
2. Octets: The total number of octets received by the interface over the interval.
3. Packets: The total number of packets received by the interface over the interval.
5. Utilization: The Utilization of the interface, in percents.
6. Errors: The total number of error packets received by the interface over the interval.
Two Trend Graph Windows will be opened to reflect History Table Information graphically:
1. Interface Utilization per interval in %.
2. Interface Errors per interval.
You may change Y-axe range for the Errors graph by clicking Optn button.
You may change current monitoring device via Device Name Combo-Box (bottom right corner).
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