3Com 4210G Series, Configuration Manual, Page: 959 / 1133

18-3
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 periodically collects statistics on data at interfaces and saves the statistics in the
history record table for query convenience. The statistics data includes bandwidth utilization, number
of error packets, and total number of packets.
Once you successfully create a history entry in the specified interface, the history group starts to
periodically collect statistics on packet at the specified interface. Each statistical value is a cumulative
sum of packets sent/received on the interface 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,
bytes sent, packets sent, and so on.
After the creation of a statistics entry on an interface, the statistics group starts to collect traffic
statistics 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
in the
System Volume
.
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
—