ZyXEL Communications ONU-2024 Series, User Manual

Page: 200 / 268

Chapter 27 Access Control
ONU User’s Guide
200
27.2 The Access Control Main Screen
Click Management > Access Control in the navigation panel to display the main screen.
Figure 111 Management > Access Control
27.3 SNMP
Simple Network Management Protocol (SNMP) is an application layer protocol used to
manage and monitor TCP/IP-based devices. SNMP is used to exchange management
information between the network management system (NMS) and a network element (NE). A
manager station can manage and monitor the ONU through the network via SNMP version
one (SNMPv1), SNMP version 2c or SNMP version 3. The next figure illustrates an SNMP
management operation. SNMP is only available if TCP/IP is configured.
Figure 112 SNMP Management Model
An SNMP managed network consists of two main components: agents and a manager.
An agent is a management software module that resides in a managed ONU (the ONU). An
agent translates the local management information from the managed ONU into a form
compatible with SNMP. The manager is the console through which network administrators
perform network management functions. It executes applications that control and monitor
managed devices.
The managed devices contain object variables/managed objects that define each piece of
information to be collected about a ONU. Examples of variables include number of packets
received, node port status and so on. A Management Information Base (MIB) is a collection of
managed objects. SNMP allows a manager and agents to communicate for the purpose of
accessing these objects.