What is SNMP protocol
What is SNMP protocol? How is SNMP work with NMS and EMS?
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SNMP is based on manager or the agent model consisting of an SNMP manager, an SNMP agent, as well as a database of management detail, managed SNMP devices and the network protocol.
The SNMP manager gives the interface among the human network manager and management system. The SNMP agent gives the interface among manager as well as physical device(s) being managed.
The SNMP manager and agent employ an SNMP Management Information Base (or MIB) and a comparatively small set of commands to swap information. The SNMP MIB is planned in a tree structure with individual variables, like description or point status, being represented as leaves on branches. A long numerical tag or object identifier (or OID) is employed to differentiate every variable exclusively in the SNMP and in MIB messages. SNMP employs five essential messages (GET, GET-NEXT, SET, GET-RESPONSE, and TRAP) to communicate among SNMP manager and SNMP agent. The GET-NEXT and GET messages gives the manager to request information for a particular variable.
The agent, on receiving a GET-NEXT or GET message, will issue a GET-RESPONSE message to the SNMP manager through moreover the information requested or a fault indication as to why the request can’t be processed. A SET message gives the SNMP manager to request alter be made to the value of a particular variable in the case of an alarm remote which will operate a communicate. The SNMP agent will then respond by a GET-RESPONSE message indicating alter has been made or a fault indication as to why the change can’t be made. The SNMP TRAP message gives the agent to spontaneously notify the SNMP manager of an ‘important’ event.
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