Understanding SNMP implementation in Data ONTAP

SNMP process

If SNMP is enabled in Data ONTAP, SNMP managers might query the SNMP agent for information (specified in the Network Appliance custom MIB or the MIB-II specification) from time to time. In response, the SNMP agent gathers information and forwards it to the SNMP managers using the SNMP protocol. The SNMP agent also generates traps whenever specific events occur and sends these traps to the SNMP managers. The SNMP managers might then carry out actions based on information received in the trap notifications.

SNMP agent and MIB groups supported

For diagnostic and other network management services, Data ONTAP supports an SNMP version 1 compatible agent. This agent provides support for the MIB-II specification and a Network Appliance custom MIB. The following MIB-II groups are supported:

System
Interfaces
Address translation
IP
ICMP
TCP
UDP
SNMP
Note
Transmission and EGP MIB-II groups are not supported.

The Network Appliance custom MIB is discussed in Contents of the Network Appliance custom MIB.

SNMP limitations in Data ONTAP

Data ONTAP imposes the following SNMP limitations:

Up to eight communities are allowed.
Trap notifications are sent to a maximum of eight network management stations.