Chapter 4: Web configuration 
NS3552-8P-2S-V2 User Manual  285 
This page includes the following fields: 
 
Object  Description 
Port  The port number of the logical port. 
Action  The currently configured port action. 
Transmit  The currently configured port transmit mode. 
Loops  The number of loops detected on this port. 
Status  The current loop protection status of the port. 
Loop  Indicates if a loop is currently detected on the port. 
Time of Last Loop  The time of the last loop event detected. 
Buttons 
•  Click Auto-refresh to refresh the page automatically. Automatic refresh occurs 
every three seconds. 
•  Click Refresh to refresh the page immediately. 
RMON 
RMON is an expansion of standard SNMP. RMON is a set of MIB definitions used to 
define standard network monitor functions and interfaces, enabling communication 
between SNMP management terminals and remote monitors. RMON provides a highly 
efficient method to monitor actions inside the subnets.  
The MID of RMON consists of 10 groups. The switch supports the most frequently used 
groups:  
•  Statistics: Maintain basic usage and error statistics for each subnet monitored by 
the agent.  
•  History: Record periodical statistic samples.  
•  Alarm: Allow management console users to set any count or integer for sample 
intervals and alert thresholds for RMON agent records.  
•  Event: A list of all events generated by the RMON agent.  
Alarm depends on the implementation of an event. Statistics and History display 
current or history subnet statistics. Alarm and Event provide a method to monitor any 
integer data change in the network, and provide some alerts upon abnormal events 
(sending Trap or record in logs). 
RMON alarm configuration 
Configure RMON alarm table on the RMON Alarm Configuration page. The entry index 
key is ID.