SNMP (MIB, Polling/Trap, Message)

SNMP (MIB: Management Information Base)

 Network devices that support SNMP have a database that stores management information about network devices called MIB (Management Information Base).

 Each piece of management information stored in the MIB is called an object, and each object has a unique OID (Object Identifier) ​​to uniquely identify the management information.

MIB objects are managed in a hierarchical structure as shown below.

OIDs are expressed as numbers separated by periods.

 For example, sysDescr, which means a description string about the device, is ".", and sysContact, which means the information of the node administrator, is ".". express.

 The agent notifies MIB information in response to a request from the manager, and no