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What Does SNMP Mean?

What you need to know about the SNMP protocol

SNMP stands for Simple Network Management Protocol. It is a client-server protocol that network administrators use to gather information about network switches, printers, phones, and other networked devices (also known as SNMP agents).

SNMP is not enabled by default in Windows 10. Microsoft recommends that administrators use the Common Information Model (CIM).

What does network SNMP mean?

SNMP is a client-server protocol. This means that network administrators must install and configure an SNMP server, known as an administrator, that constantly collects detailed information about SNMP devices on the network.

SNMP servers collect and store information about all SNMP agents. This network management protocol makes it easy to collect real-time information about these devices without generating excessive network traffic.

SNMP agents are networked devices that support SNMP network monitoring. Typical SNMP agents include:

  • computers
  • printers
  • network switches
  • wireless access points
  • VoIP phones
  • IP hours

Hero Pictures / Getty Images

How does SNMP work?

Each SNMP agent, depending on the manufacturer, has a list of objects that network administrators can collect information about using SNMP commands to access information. The data is organized in a tree structure on the SNMP server as follows:

  • Management Information Base (MIB): This is the top-level group that keeps certain types of devices (such as printers or computers) organized.
  • also: Within each MIB, there are separate nodes that represent individual devices in the network.
  • Object Identifier (OID): This is the private address that network administrators use to access individual nodes within the MIB. OID allows administrators to issue commands to request information about a node.

To monitor a device with an SNMP server, the only requirement is that the device supports the SNMP protocol. Many devices, such as VoIP phones and printers, usually have SNMP enabled by default. Other devices, such as Windows 10 computers, need to enable it manually. See the device manual for instructions on how to enable SNMP.

What is an SNMP trap?

The main benefit of the SNMP protocol is that it consumes very little network bandwidth. It does this through what is known as a trap.

In a typical client-server system, a server may request or request information from many devices on a network when it needs to update a central database. However, since most networks have a large number of devices providing a large amount of information, it would be impractical for the server to poll all these devices continuously. This severely degrades network performance.

Instead, every SNMP device on the network automatically captures the information and sends it to the SNMP manager without being prompted. In an SNMP client-server model, communication typically goes like this:

  • SNMP agents capture events and send unsolicited updates to the SNMP manager.
  • SNMP administrators can automatically respond to trap events with automatic follow-up requests for additional information.
  • Network administrators can use the SNMP manager to manually poll devices for troubleshooting or management.

This approach enables large amounts of information to be monitored and managed without adversely affecting the network.

To enable an SNMP trap in Windows 10 Definitions and go Apps and Features > Optional features > add sourcecall later Simple Network Management Protocol (SNMP).

Basic SNMP commands

After an SNMP server is configured and agents are available on the network, network administrators select a set of commands as part of their network monitoring toolkit. Below are some of the most commonly used SNMP commands:

  • RECEIVE: Get one or more tracked values.
  • NEXT LATE: Get the next OID in the device’s MIB tree.
  • COLLECTIVE GAINS: Pull a large collection of data values.
  • TO DEFINE: Assigns a value to a variable in the device.

There are also device-specific SNMP commands, depending on the device being monitored. For example, when monitoring a network switch, administrators can access the following commands:

  • Configure Terminal: Put the command prompt in global configuration mode.
  • Show running config: Provides a list that confirms all configuration entries.
  • Copy Running Configuration Startup Configuration: Save the currently running configuration to ensure that the same configuration is used when the switch is rebooted.

Device manufacturers provide a library of available SNMP commands and documentation on how to use the commands, so check the user guide on the manufacturer’s website.


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What Does SNMP Mean?

What you need to know about the SNMP protocol

SNMP means Simple Network Management Protocol. It’s a client-server protocol that network administrators use to gather information about network switches, printers, phones, and other devices connected to the network (also known as SNMP agents).

SNMP is not enabled by default in Windows 10. Microsoft recommends that administrators instead use the Common Information Model (CIM).
What Does SNMP Mean in Networking?

SNMP is a client-server protocol. This means that network administrators need to install and configure an SNMP server, known as a manager, which constantly collects detailed information about SNMP devices on the network.

SNMP servers gather and store information about all the SNMP agents. This network management protocol makes it easy to collect real-time information about those devices without creating excessive network traffic.

SNMP agents are devices connected to the network that supports SNMP network monitoring. Typical SNMP agents include:

Computers
Printers
Network switches
Wireless access points
VoIP phones
IP time clocks

Hero Images / Getty Images How SNMP Works

Each SNMP agent, depending on the manufacturer, has a list of objects that network administrators can gather information about using SNMP commands to access the information. The data is organized in a tree structure in the SNMP server as follows:

Management Information Base (MIB): This is the top-level group that keeps specific types of devices (like printers or computers) organized.
Node: Inside each MIB, there are individual nodes that represent individual devices on the network.
Object Identifier (OID): This is the specific address network administrators use to access individual nodes inside the MIB. The OID lets administrators issue commands to request information about a node.

The only requirement for monitoring a device with an SNMP server is that the device is compatible with the SNMP protocol. Many devices, like VoIP phones and printers, usually have SNMP enabled by default. Other devices, like Windows 10 computers, need to have it enabled manually. Check the device manual for instructions on how to enable SNMP.

What Is an SNMP Trap?

The main benefit of the SNMP protocol is that it consumes little network bandwidth. It does this through what’s known as a trap.

In a typical client-server system, a server may poll, or request, information from many devices on a network every time it needs to update a central database. However, because most networks have a large number of devices providing a large volume of information, it wouldn’t be practical for the server to poll all those devices continually. Doing so would severely hamper network performance.

Instead, every SNMP device on the network automatically traps information and sends it to the SNMP manager without being asked. Here’s how communication typically takes place in an SNMP client-server model:

SNMP agents trap events and send unsolicited updates to the SNMP manager.
SNMP managers may automatically respond to trap events with automatic follow-up requests for additional information.
Network administrators can use the SNMP manager to manually poll devices for troubleshooting or management.

This approach allows for the monitoring and management of a large volume of information without negatively impacting the network.

To enable an SNMP trap on Windows 10, open Settings and go to Apps & Features > Optional features > Add a feature, then look for Simple Network Management Protocol (SNMP).
Basic SNMP Commands

Once an SNMP server is configured and agents are present on the network, network administrators choose from a set of commands as part of their network monitoring toolset. The following are some of the most commonly used SNMP commands:

GET: Retrieve one or more monitored values.
GET NEXT: Retrieve the value of the next OID in the device MIB tree.
GET BULK: Pull a large collection of data values.
SET: Assign a value to a variable on the device.

There are also device-specific SNMP commands depending on the device being monitored. For example, when monitoring a network switch, administrators have access to the following commands:

Configure Terminal: Place the command prompt into global configuration mode.
Show Running-Config: Provide a list confirming all configuration entries.
Copy Running-Config Startup-Config: Save the currently running configuration to ensure the same configuration is used when the switch restarts.
Device manufacturers provide documentation for the library of available SNMP commands and how to use the commands, so check the user manual on the manufacturer’s website.

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