Communication
11.2 PROFINET
S7-1200 Programmable controller
964 System Manual, V4.2, 09/2016, A5E02486680-AK
Simple Network Management Protocol (SNMP) is an Internet-standard protocol for collecting
and organizing information about managed devices on IP networks and for modifying that
information to change device behavior. Devices that typically support SNMP include routers,
switches, servers, workstations, printers, modem racks, and more.
SNMP is widely used in network management systems to monitor network-attached devices
for conditions that warrant administrative attention. SNMP uses various services and tools
for detection and diagnostics of the network topology. Information about the properties of
devices capable of SNMP is contained in Management Information Base (MIB) files for
which the user needs to have the appropriate rights. SNMP exposes management data in
the form of variables on the managed systems, which describe the system configuration.
These variables can then be queried (and sometimes set) by managing applications.
SNMP uses the UDP transport protocol and has two network components:
● SNMP manager: Monitors the network nodes
● SNMP client: Collects the various network-specific information in the individual network
nodes and stores it in a structured form in the Management Information Base (MIB). With
this data, detailed network diagnostics can be performed.
Under certain conditions, your application may require you to disable SNMP. Examples of
these conditions include the following:
● The security settings in your network do not allow the use of SNMP.
● You use your own SNMP solution (for example, with your own communications
instructions).
If you disable SNMP for a device, you no longer have some options for diagnostics of the
network topology (for example, using the PRONETA tool or the web server of the CPU).
To Next Page
Loading...
