34
RMON C
ONFIGURATION
Introduction to RMON
Remote monitoring (RMON) is a kind of management information base (MIB) defined
by Internet Engineering Task Force (IETF) and is a most important enhancement made
to MIB II standards. RMON is mainly used to monitor the data traffic across a network
segment or even the entire network, and is currently a commonly used network
management standard.
An RMON system comprises of two parts: the network management station (NMS)
and the agents running on each network device. RMON agents operate on network
monitors or network probes to collect and keep track of the statistics of the traffic
across the network segments to which their ports connect such as the total number
of the packets on a network segment in a specific period of time and the total
number of packets that are sent to a specific host successfully.
RMON is fully based on simple network management protocol (SNMP) architecture. It
is compatible with the current SNMP, so that you can implement RMON without
modifying SNMP. RMON enables SNMP to monitor remote network devices more
effectively and actively, thus providing a satisfactory means of monitoring the
operation of the subnet. With RMON, the communication traffic between NMS and
agents is reduced, thus facilitating the management of large-scale internets.
Working Mechanism of
RMON
RMON allows multiple monitors. It collects data in one of the following two ways:
■
Using the dedicated RMON probe. When an ROM system operates in this way, the
NMS directly obtains management information from the RMON probes and
controls the network resources. In this case, all information in the RMON MIB can
be obtained.
■
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 four groups of information (instead of
all the information in the RMON MIB). The four groups are alarm group, event
group, history group and statistics group.
An S3100 series switch implements RMON in the second way. Through the
RMON-capable SNMP agents running on the network monitors, 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.
Commonly Used RMON
Groups
Event group
The 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 in alarm group
and extended alarm group to trigger alarms.
Summary of Contents for 4200G 12-Port
Page 10: ...8 CONTENTS...
Page 14: ...4 ABOUT THIS GUIDE...
Page 46: ...32 CHAPTER 5 LOGGING IN THROUGH WEB BASED NETWORK MANAGEMENT SYSTEM...
Page 48: ...34 CHAPTER 6 LOGGING IN THROUGH NMS...
Page 60: ...46 CHAPTER 9 VLAN CONFIGURATION...
Page 64: ...50 CHAPTER 10 MANAGEMENT VLAN CONFIGURATION...
Page 80: ...66 CHAPTER 13 GVRP CONFIGURATION...
Page 98: ...84 CHAPTER 15 LINK AGGREGATION CONFIGURATION...
Page 112: ...98 CHAPTER 18 MAC ADDRESS TABLE MANAGEMENT...
Page 126: ...112 CHAPTER 19 LOGGING IN THROUGH TELNET...
Page 162: ...148 CHAPTER 20 MSTP CONFIGURATION...
Page 274: ...260 CHAPTER 29 IGMP SNOOPING CONFIGURATION...
Page 276: ...262 CHAPTER 30 ROUTING PORT JOIN TO MULTICAST GROUP CONFIGURATION...
Page 298: ...284 CHAPTER 33 SNMP CONFIGURATION...
Page 304: ...290 CHAPTER 34 RMON CONFIGURATION...
Page 338: ...324 CHAPTER 36 SSH TERMINAL SERVICES...
Page 356: ...342 CHAPTER 38 FTP AND TFTP CONFIGURATION...
Page 365: ...Information Center Configuration Example 351 S4200G terminal logging...
Page 366: ...352 CHAPTER 39 INFORMATION CENTER...
Page 378: ...364 CHAPTER 40 BOOTROM AND HOST SOFTWARE LOADING...
Page 384: ...370 CHAPTER 41 Basic System Configuration and Debugging...
Page 388: ...374 CHAPTER 43 NETWORK CONNECTIVITY TEST...
Page 406: ...392 CHAPTER 45 CONFIGURATION OF NEWLY ADDED CLUSTER FUNCTIONS...