SICOM3004/SICOM3006 User’s Manual 201105
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the delay time from blocking to forwarding in the port in order to resume the network
communication ASAP.
ACL
ACL (Access Control List) use protocols to define the access rules by the source or target MAC
addresses. It can limit the network traffic, enhance network performance and control the
communication flow. ACL is the basic security method to network access.
Alarm
Output
This function is significant for the real time transmission of device alarms. Alarm function
includes port alarm and ring alarm which can be enabled by management software. The alarm
information is displayed on the network management interface.
SNMP
SNMP
（
Simple
Network
Management
Protocol
）
offers a frame structure for low level
network management. SNMP protocol is used widely. Many kinds of networking devices, software
and system adopt it because it is easy to be realized, free, and can be used to control various
devices.
RMON
RMON is a standard monitoring regulation, used to switch the network monitoring data between
network monitors and console system. It offers more selections for network operators to choose
the suitable console and network monitor for special requirements. It is a supplementation to
SNMP function and is especially useful for monitoring and managing LAN. The purpose of
developing RMON is to provide statistic result of information flow and analyze network
parameters so as to work out a comprehensive network diagnoses, plan and regulation.
By RMON, users can do operation among SNMP management stations and monitoring agents.
Furthermore, it can offer a standard for a group of MIB to collect the network statistics which is
not available via SNMP. RMON realizes early network diagnoses by using powerful Alarm Group,
which allows to set thresholds for key network parameters so as to automatically send alarm
signal to central management console.
