Schneider Electric 890USE17700 - Manual (Page 104)

STB NIP 2212 Web Server
104 890USE17700 April 2004
SNMP Protocol
Data Units
(PDUs) Protocol Data Units (PDUs) within SNMP carry requests and responses between the
manager and the STB NIP 2212 agent. The following PDUs are used:
z GetRequest—An SNMP manager uses the "Get" PDU to read the value of one
or more management information base (MIB) (See Management Information
Base (MIB), p. 107) objects from the STB NIP 2212 agent.
z SetRequest—An SNMP manager uses the "Set" PDU to write a value to one or
more objects resident on the STB NIP 2212 agent.
These PDUs are used in conjunction with MIB objects to get and set information
contained in an Object Identifier (OID).
SNMP PDU
Structure An SNMP message is the innermost part of a typical network transmission frame, as
shown in the following illustration:
Version &
Community
Identifiers The STB NIP 2212 is configured with SNMP, Version 1.0. When setting up the
SNMP agent function for your STB NIP 2212 (See Configure SNMP Web Page,
p. 105), you should configure private community name(s) for GetRequest and
SetRequest.
The community name is an identifier that you assign to your SNMP network when
you set up the SNMP manager. Community names for the SNMP manager and
agent must agree before SNMP processing can occur.
MAC
header
local IP
network
header
UDP
header SNMP message
local
network
trailer
Version Community GetRequest or SetRequest
PDU
Note: If you do not configure private community names for GetRequest and
SetRequest, any SNMP manager can read the MIB objects for your STB NIP 2212.