HP 445946-001 - Manual (Page 158)

Remote monitoring
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3. Enable RMON on the port.
4. Click Submit.
5. Apply, verify, and save the configuration.
RMON group 2—history
The RMON History group allows you to sample and archive Ethernet statistics for a specific interface
during a specific time interval.
NOTE: RMON port statistics must be enabled for the port before an RMON history group can
monitor the port.
Data is stored in buckets, which store data gathered during discreet sampling intervals. At each
configured interval, the history instance takes a sample of the current Ethernet statistics, and places them
into a bucket. History data buckets reside in dynamic memory. When the switch is re-booted, the buckets
are emptied.