Siemens S323 User Manual

UMN:CLI                                                                                                                                                              User  Manual 

SURPASS hiD 6615 S223/S323 R1.5 

126                                                                         A50010-Y3-C150-2-7619 

Remote Monitoring (RMON) is a function to monitor communication status of devices 
connected to Ethernet at remote place. While SNMP can give information only about the 
device mounted SNMP agent, RMON gives information about overall segments including 
devices. Thus, user can manage network more effectively. For instance, in case of SNMP 
it is possible to be informed traffic about certain ports but through RMON you can monitor 
traffics occurred in overall network, traffics of each host connected to segment and cur-
rent status of traffic between hosts. 

Since RMON processes quite lots of data, its processor share is very high. Therefore, 
administrator should take intensive care to prevent performance degradation and not to 
overload network transmission caused by RMON. There are nine defined RMON MIB 
groups in RFC 1757: Statistics, History, Alarm, Host, Host Top N, Matrix, Filter, Packet 
Capture and Event. The system supports two MIB groups of them, most basic ones: Sta-
tistics (only for uplink ports) and History. 

 

RMON history is periodical sample inquiry of statistical data about each traffic occurred in 
Ethernet port. Statistical data of all ports are pre-configured to be monitored at 30-minute 
interval, and 50 statistical data stored in one port. It also allows you to configure the time 
interval to take the sample and the number of samples you want to save. 

The following is an example of displaying the default configuration of RMON history. 

SWITCH(config)# show rmon-history config 5 

RMON History configuration: 

=========================== 

history index 

: 5 

data source 

: 0/1 (1) 

buckets requested  : 50 

buckets granted 

: 50 

interval time (s)  : 1800 

owner : 

none 

status 

: under create 

SWITCH(config)# 

 

To open RMON-history mode, use the following command. 

 <1-65535> 

Global 

Opens RMON-history Configuration mode. 
1-65535: index number 

 

The following is an example of opening RMON-history Configuration mode with index 
number 5. 

SWITCH(config)# rmon-history 5 

SWITCH(config-rmonhistory[5])# 

 

Input a question mark <?> at the system prompt on RMON Configuration mode if you