Siemens SIMATIC NET SCALANCE S615 Configuration Manual page 27

The management station sends data packets of the following type:
● GET
Request for a data record from the agent
● GETNEXT
Calls up the next data record.
● GETBULK (available as of SNMPv2)
Requests multiple data records at one time, for example several rows of a table.
● SET
Contains parameter assignment data for the relevant device.
The SNMP agent sends data packets of the following type:
● RESPONSE
The agent returns the data requested by the manager.
● TRAP
If a certain event occurs, the SNMP agent itself sends traps.
SNMPv1/v2/v3 use UDP (User Datagram Protocol) and use the UDP ports 161 and 162. The
data is described in a Management Information Base (MIB).
SNMPv3
Compared with the previous versions SNMPv1 and SNMPv2. SNMPv3 introduces an
extensive security concept.
SNMPv3 supports:
● Fully encrypted user authentication
● Encryption of the entire data traffic
● Access control of the MIB objects at the user/group level
SCALANCE S615 Web Based Management
Configuration Manual, 05/2015, C79000-G8976-C388-02
Technical basics
2.4 SNMP
27