SNMP Basic Commands

Managed devices are monitored and controlled using four basic SNMP commands: read, write, trap and traversal operations.

• The read command is used by an NMS to monitor managed devices. the NMS examines different variable that are maintained by managed devices.

• The write command is used by an NMS to control managed devices. The NMS changes the values of variable stored within managed devices.

• The trap command is used by managed devices to asynchronously report events to the NMS. When certain types of events occur, a managed device sends a trap to the NMS.

• Traversal operations are used by the NMS to determine which variables a managed device supports and to sequentially gather information in variable tables, such as a routing table.