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92 Chapter 6 Configuring RMON using Device Manager
RMON 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 default values for history are:
•
Buckets are gathered at 30-minute intervals.
• Number of buckets gathered is 50.
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.
Creating a history
You can use RMON to collect statistics at intervals. For example, if you
want RMON statistics to be gathered over the weekend, you require
enough buckets to cover two days. To do this, set the history to gather one
bucket each hour, thus covering a 48-hour period. After you set history
characteristics, you cannot modify them; you must delete the history and
create another one.
To establish a history for a port and set the bucket interval:
Step Action
1
From the Device Manager main menu, choose Rmon > Control.
The RmonControl dialog box opens with the History tab displayed
Figure 33 "History tab" (page 92).
Figure 33
History tab
2
Click Insert.
The RmonControl, Insert History dialog box opens (Figure 34
"RmonControl, Insert History dialog box" (page 93)).
Nortel Ethernet Switch 460/470
Configuration — System Monitoring
NN47210-503 01.01 Standard
3.7 22 February 2007
Copyright © 2005-2007, Nortel Networks Nortel Networks Confidential
.