Configuring RMON 943
■ Compares the result with the defined threshold and generates an appropriate
event.
n
If the count result overpasses the same threshold multiple times, only the first one
can cause an alarm event. That is, the rising alarm and falling alarm are alternate.
History group
The history group controls the periodic statistical sampling of data, such as
bandwidth utilization, number of errors, and total number of packets.
Note that each value provided by the group is a cumulative sum during a sampling
period.
Ethernet statistics group
The statistics group monitors port utilization. It provides statistics about network
collisions, CRC alignment errors, undersize/oversize packets, broadcasts,
multicasts, bytes received, packets received, and so on.
After the creation of a valid event entry on a specified interface, the Ethernet
statistics group counts the number of packets received on the current interface.
The result of the statistics is a cumulative sum.
Configuring RMON
Configuration
Prerequisites
Before configuring RMON, configure the SNMP agent as described in “SNMP
Configuration” on page 931.
Configuration Procedure Follow these steps to configure RMON:
To do… Use the command… Remarks
Enter system view system-view -
Create an event entry in the
event table
rmon event entry-number
[ description string ] { log | log-trap
log-trapcommunity | none | trap
trap-community } [ owner text ]
Optional
Enter Ethernet interface view interface interface-type
interface-number
-
Create an entry in the history
table
rmon history entry-number buckets
number interval sampling-interval
[ owner text ]
Optional
Create an entry in the
statistics table
rmon statistics entry-number
[ owner text ]
Optional
Exit Ethernet interface view quit -
Create an entry in the alarm
table
rmon alarm entry-number
alarm-variable sampling-interval
{ absolute | delta } rising-threshold
threshold-value1 event-entry1
falling-threshold threshold-value2
event-entry2 [ owner text ]
Optional
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