Commonly Used Rmon Groups - H3C S3100-52P Operation Manual

Operation Manual – SNMP-RMON
H3C S3100-52P Ethernet switch
Embedding RMON agents into network devices (such as routers, switches and
hubs) directly to make the latter capable of RMON probe functions. When an
RMON system operates in this way, the NMS collects network management
information by exchanging information with the SNMP agents using the basic
SNMP commands. However, this way depends on device resources heavily and
an NMS operating in this way can only obtain the information about these four
groups (instead of all the information in the RMON MIB): alarm group, event group,
history group, and statistics group.
An H3C S3100-52P Ethernet switch implements RMON in the second way. With an
RMON agent embedded in, an S3100-52P Ethernet switch can serve as a network
device with the RMON probe function. Through the RMON-capable SNMP agents
running on the Ethernet switch, an NMS can obtain the information about the total traffic,
error statistics and performance statistics of the network segments to which the ports of
the managed network devices are connected. Thus, the NMS can further manage the
networks.

2.1.2 Commonly Used RMON Groups

I. Event group
Event group is used to define the indexes of events and the processing methods of the
events. The events defined in an event group are mainly used by entries in the alarm
group and extended alarm group to trigger alarms.
You can specify a network device to act in one of the following ways in response to an
event:
Logging the event
Sending traps to the NMS
Logging the event and sending traps to the NMS
No processing
II. Alarm group
RMON alarm management enables monitoring on specific alarm variables (such as the
statistics of a port). When the value of a monitored variable exceeds the threshold, an
alarm event is generated, which then triggers the network device to act in the way
defined in the events. Events are defined in event groups.
With an alarm entry defined in an alarm group, a network device performs the following
operations accordingly:
Sampling the defined alarm variables periodically
Comparing the samples with the threshold and triggering the corresponding
events if the former exceed the latter
2-2
Chapter 2 RMON Configuration