Technical basics
3.7 SNMP
SCALANCE W780/W740 to IEEE 802.11n Web Based Management
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Configuration Manual, 03/2015, C79000-G8976-C267-08
The management station sends data packets of the following type:
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GET
Request for a data record from the agent
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GETNEXT
Calls up the next data record.
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GETBULK (available as of SNMPv2)
Requests multiple data records at one time, for example several rows of a table.
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SET
Contains parameter assignment data for the relevant device.
The SNMP agent sends data packets of the following type:
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RESPONSE
The agent returns the data requested by the manager.
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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:
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Fully encrypted user authentication
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Encryption of the entire data traffic
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Access control of the MIB objects at the user/group level