ZyXEL Communications Dimension GS-3012, Руководство пользователя, Страница: 166 / 259

GS-3012/GS-3012F User’s Guide
24-2 Access Control
Figure 24-2 Console Port Priority
24.3 About SNMP
Simple Network Management Protocol is a protocol used for exchanging management information between
network switches. SNMP is a member of TCP/IP protocol suite. A manager station can manage and monitor the
switch through the network via SNMP version one (SNMPv1) and/or SNMP version 2c. The next figure illustrates
an SNMP management operation. SNMP is only available if TCP/IP is configured.
Figure 24-3 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 switch (the GS). An agent translates the local
management information from the managed switch 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 switch. Examples of variables include such as number of packets received, node port status etc. 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.
“Local administrator is configuring this device now!!!
Connection to host lost.”