The two parameters are used to set the number of GetNext operations to be included in one GetBulk operation. Non repeaters/Max repetitions: A GetBulk operation is equal to consecutive GetNext operations.It is used to match a request and the corresponding response. Request ID: specifies the unique ID of each request.When SNMP set operations are performed, the write community name is used for authentication. When SNMP get operations are performed, the read community name is used for authentication. The value is a user-defined string of characters. Community name: is used for authentication between the SNMP agent and NMS.The value is 0 for SNMPv1 or 1 for SNMPv2c. The fields in SNMPv1 and SNMPv2c get packets are as follows: SNMPv3 supports the same operations as SNMPv2c.įigure 1-4 Format of SNMPv1 and SNMPv2c get packets SNMPv3 enhances security, and provides authentication and encryption based on the user-based security module (USM) as well as access control based on the view-based access control model (VACM).Compared with SNMPv1, SNMPv2c has enhancements to standard error codes, data types (Counter64 and Counter32), and operations including GetBulk and Inform. SNMPv2c also provides authentication based on community names.In addition, a limited number of error codes are returned in packets. SNMPv1 provides authentication based on community names, causing low security.
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