H3C Technologies H3C MSR 5600 - Manual (Page 135)

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Sample types for the alarm group and the private alarm group
The RMON agent supports the following sample types:
• absolute—RMON compares the value of the monitored variable with the rising and falling
thresholds at the end of the sampling interval.
• delta—RMON subtracts the value of the monitored variable at the previous sample from the current
value, and then compares the difference with the rising and falling thresholds.
Protocols and standards
• RFC 4502, Remote Network Monitoring Management Information Base Version 2
• RFC 2819, Remote Network Monitoring Management Information Base Status of this Memo
Configuring the RMON statistics function
RMON implements the statistics function through the Ethernet statistics group and the history group.
The Ethernet statistics group provides the cumulative statistic for a variable from the time the statistics entry
is created to the current time. For more information about the configuration, see " Creating an RMON
Ethernet statistics entry ."
The history group provides statistics that are sampled for a variable for each sampling interval. The
history group uses the history control table to control sampling, and it stores samples in the history table.
For more information about the configuration, see " Creating an RMON history control entry ."
Creating an RMON Ethernet statistics entry
Step Command Remarks
1. Enter system view. system-view N/A
2. Enter Ethernet
interface view. interface interface-type
interface-number
N/A
3. Create an entry for
the interface in the
RMON statistics
table.
rmon statistics entry-number [ owner
text ]
By default, the RMON statistics table does
not contain entries.
You can create one statistics entry for
each Ethernet interface, and up to 100
statistics entries on the device. After the
entry limit is reached, you cannot add
new entries.
Creating an RMON history control entry
You can configure multiple history control entries for one interface, but you must make sure their entry
numbers and sampling intervals are different.
You can create a history control entry successfully even if the specified bucket size exceeds the available
history table size. RMON will set the bucket size as closely to the expected bucket size as is possible.