Basic SNMP operation

Every Extreme device carries an agent and management information base (MIB). The agent accesses information about a device and makes it available to an SNMP network management station.

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SNMP structure

When active, the management station can “get” information or “set” information when it queries an agent. SNMP commands, such as get, set, getnext, and getbulk, are sent from the management station, and the agent replies immediately and send traps/notifications on any asynchronous events on the device. Agents use variables to report such data as the number of bytes and packets in and out of the device, or the number of broadcast messages sent and received. These variables are also known as managed objects. All managed objects are contained in the MIB.

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SNMP query

The management station can also receive traps, unsolicited messages from the switch agent, if an unusual event occurs.

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SNMP trap

The agent can receive queries from one or more management stations and can send traps to up to six management stations.