Device Manager - Online Help

Viewing history

Ethernet History records periodic statistical samples from a network. A sample is called a history and is gathered in time intervals referred to as "buckets." Histories establish a time-dependent method for gathering RMON statistics on a port. The value of these history records reflects what will be created if you use JDM to create new history control records. Control records and buckets are stored on the unit with the port they are monitoring. The default values for history are:

• Buckets are gathered for each port at 30-second and at 30-minute intervals.
• Number of buckets gathered is 6, 3 for each 30 second, and 3 for each 30 minute interval.

The BayStack 450 limits the number of history control records per unit to 85 and the number of actual stored buckets per unit to 255.

Both the time interval and the number of buckets is configurable. However, when the last bucket is reached, bucket 1 is dumped and "recycled" to hold a new bucket of statistics. Then bucket 2 is dumped, and so forth.

• Working with RMON information
• Rmon Ethernet statistics tab
• RmonControl dialog box
• Rmon Ether Stats tab
• Disabling Ethernet statistics gathering