Mib Overview; Configuring Snmp - HP 5820X Switch Configuration Manual

• SNMPv3 offers an authentication mechanism that is implemented based on the User-based Security
Model (USM). You can set the authentication and privacy functions. The former authenticates the
validity of the sending end of the authentication packets, preventing access of unauthorized users;
the latter encrypts packets between the NMS and agents, preventing the packets from being
intercepted. USM ensures a more secure communication between SNMP NMS and SNMP agent by
authentication with privacy, authentication without privacy, or no authentication no privacy.
Successful interaction between an NMS and the agents requires consistency of SNMP versions configured
on them.

MIB overview

Any managed resource can be identified as an object, which is the managed object. MIB is a collection
of all managed objects. It defines the hierarchy of the objects and a set of characteristics associated with
the managed objects, such as the OID, access right and data type. Each agent has its own MIB. An NMS
can read or write the managed objects in the MIB.
Figure 35 Relationship between an NMS, agent and MIB
A MIB stores data by using a tree structure. Each node of the tree represents a managed object that can
be uniquely identified by a path starting from the root node. As illustrated in
object B can be uniquely identified by a string of numbers {1.2.1.1}. This string is the OID of the managed
object B.
Figure 36 MIB tree
1
1
1
B
5
A

Configuring SNMP

Because SNMPv3 configurations differ from SNMPv1 and SNMPv2c configurations, their SNMP
functionalities are introduced separately.
2
1 2
2
6
97
Figure 36, the managed