Device Management
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Get operation: SNMP administrator uses the operation to inquire the values of one or
more objects of the SNMP agent;
Set operation: SNMP administrator uses the operation to reset the values of one or
more object inside the MIB base;
Trap operation: SNMP agent uses the operation to aggressively send a warning
message to the SNMP administrator (for example: rebooting of a managed device).
SNMP protocol version
The switch is compatible with the versions such as SNMP v1 and SNMP v2c and allows
group name authentication. SNMP group name is used to define the relationship between
SNMP NMS and SNMP administrator. If the group name carried by SNMP message is not
approved by the device, the message will be discarded. The group name functions as a
password, and is used to restrict the SNMP administrator to access the SNMP agent.
SNMP v2c not only is compatible with SNMP v1, but also has expanded the functions of
SNMP v1: It provides more operation types (GetBulk and InformRequest); supports more
data types (such as Counter64); and provides richer error codes for even more meticulous
error discrimination.
Brief introduction to the MIB base
MIB is organized with a tree topology. Each tree node indicates a managed object, which
can be uniquely identified by a numeral string starting from root and indicating the path; the
numeral string is referred to as OID (Object Identifier). The structure of MIB is shown in the
figure. As shown in Figure, OID of A is (1.3.6.1.2.1.1), while OID of B is (1.3.6.1.2.1.2).
