The predecessor of SNMP was the Simple Gateway Monitoring Protocol (SGMP), which was used to manage communication lines. Subsequently, people have made a lot of changes to SGMP, especially the SMI and MIB architectures that conform to the Internet definition. The improved protocol is the famous SNMP. The goal of SNMP is to manage the hardware and software platforms produced by many vendors on the Internet. Therefore, SNMP is also heavily influenced by the Internet standard network management framework. Now SNMP has come out to the third version of the protocol, and its functions have been greatly enhanced and improved. The SNMP architecture is designed around four concepts and objectives: (1) Keep the software cost of the management agent as low as possible; (2) Maximize the function of remote management to make full use of the network resources of the Internet; (3) The architecture must have room for expansion; (4) Maintain SNMP independence, independent of specific computer, gateway and network transport protocols. In recent improvements, the goal of ensuring the security of the SNMP system itself has been added. 1) get-request operation: Extract one or more parameter values ​​from the agent process. 2) get-next-request operation: Extract the next parameter value of one or more parameters from the agent process. 3) set-request operation: Set one or more parameter values ​​of the agent process. 4) response operation: one or more parameter values ​​returned. This operation is issued by the agent process. It is the response operation of the previous three operations. 5) trap operation: The agent actively sends out a message to notify the management process that something has happened. The request identifier field is used to correspond to the Response message; it is used to determine which Get operation the Response is for. 1. Install the SNMP service 1) Open the "Windows Components Wizard". 2) In Components, click Manage and Monitor Tools (but do not select or clear its check box), and then click Details. 3) Select the "Simple Network Management Protocol" checkbox and click "OK". 4) Click "Next". Configuring proxy properties 1) Open "Computer Management". 2) In the console tree, click Services. position 1) Services and applications/services 2) In the details pane, click SNMP Service. 3) On the Actions menu, click Properties. 4) On the Proxy tab, in Contacts, type the name of the user or administrator of this computer. 5) In Location, type the physical location of your computer or contact. 6) Under "Services", select the corresponding check box for the computer and click "OK". Configuration trap 1) Open "Computer Management". 2) In the console tree, click Services. position 1) Services and applications/services 2) In the details pane, click SNMP Service. 3) On the Actions menu, click Properties. 4) On the Trap tab, under Community Name, type the target community name (case sensitive) for the trap message sent by this computer, and then click "Add to list." 5) In the "Trap Target", click "Add". 6) In Host Name, IP or IPX Address, type the host information and click Add. 7) Repeat steps 5 through 7 until all required community and trap targets have been added. Configuring SNMP security attributes 1) Open "Computer Management". 2) In the console tree, click Services. position 1) Services and applications/services 2) In the details pane, click SNMP Service. 3) On the Actions menu, click Properties. 4) If you want to send a trap message when authentication fails, check Send Authentication Trap on the Security tab. 5) Under "Accept community name", click "Add". 6) Under Group Rights, select a privilege level to allow this host to process SNMP requests from the selected community. 7) In Community Name, type the community name (case sensitive) and click Add. 8) Specify whether to accept SNMP packets from a host: To accept SNMP requests from any host on the network regardless of their identity, click Accept SNMP packets from any host. To accept SNMP packets with restrictions, click Accept SNMP packets from these hosts, then click Add, type the appropriate host name, IP address, or IPX address, and then click Add again. Start or stop the SNMP service 1) Open "Computer Management". 2) In the console tree, click Services. position Services and applications/services 3) In the details pane, click SNMP Service. 4) On the Actions menu, click Start, Stop, or Restart. Configuring trap converter events 1) Open the "Command Prompt". 2) At the command prompt, type evntcmd /? To understand the syntax and options of the evntcmd command.
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I. SNMP overview