What is SNMP Protocol in Networking? – SNMP (Simple Network Management Protocol) is a network device management protocol running on the application layer of the OSI model.
What is SNMP Protocol in Networking?
What is SNMP Protocol in Networking?
The SNMP protocol allows management and monitoring of network devices. With the SNMP protocol, management of network devices such as Router, Switch, Hub, Bridge, Server, Printer, Modem on the network can be easily controlled. And even a UPS device with a network card can be managed and monitored.
The SNMP protocol is officially described in the IETF. In a large network, managing all network devices is not an easy task. With the SNMP protocol, we can easily manage the devices by remotely accessing them. For example, a monitoring method for the CPU usage of A Router can be created.
The SNMP protocol uses the UDP 161 port for generic messages and the UDP 162 port for Trap messages.
What Does SNMP Do?
If we answer the question of what is SNMP protocol, we briefly talked about SNMP. The entire network can be easily monitored and controlled via SNMP protocol. With the SNMP protocol, the bandwidth utilization of the Internet connection, the CPU temperature of the computer, and the heavy traffic in the network can be monitored.
Therefore, the performance of a network that can be monitored and managed can be improved. Bandwidth can be tested by monitoring a Web Server on the network and abnormal traffic can also be monitored during attacks on your Web Server.
Any network device with a network card and an IP address can be managed and monitored with the SNMP protocol. There are components that SNMP uses to accomplish so many tasks. After explaining what is SNMP protocol and what it does, let’s look at the SNMP components.
SNMP components are divided into 4 groups. These;
1. Management Station
The computer that the manager uses to monitor and manage the network and that has SNMP software installed.
2. Management Agent
SNMP agent software integrated with the device managed by the SNMP protocol.
3. Management Information Base (MIB)
All information collected by the management agent is stored in the MIB database. The Management Station obtains the necessary information using the MIB database. In addition, the information in the Databases can be checked by changing.
4. Network Management Protocol
The network management protocol is used to establish communication between the management station and the management agent.
SNMP versions are explained in 3 groups. Let’s look at the SNMP versions.
SNMPv1: It is the first version of the SNMP protocol and is defined in RFC 1157.
SNMPv2: In SNMP version 2, error handling and efficiency improvements have developed. It is described in detail in RFC 1901.
SNMPv3: This version has improved for security and privacy.SNMPv3 version is defined in RFC 3410.
How SNMP Protocol Works?
Now let’s answer how SNMP works. The SNMP management station sends a request to gather information from the network devices in the network. The information to be collected is collected and evaluated by the request management representative. As a result, information collection is completed by submitting requests to the request management station.
In the SNMP information collection phase, a method called Trap is available. What is Trap?: Trap is used to generate an alarm. This alarm occurs when a certain condition is met.
Management agents can be made more efficient by configuring with Trap. For example; If it is desired to check traffic conditions that can be accessed by a specific interface of a network device, a trap is generated for it and configured with trap rules. The controlled interface sends a report to the management station at a specified rule.
By creating Traps with SNMP 3rd party software, we can reduce the request for management station information collection. As a result, we reduce network usage to a minimum.
We have mentioned above that how SNMP protocol works at the application layer. You can easily find SNMP software on the Internet. To give an example of SNMP software;
1. HP OpenView
HP OpenView SNMP software is the most widely used management and monitoring software.
CiscoWorks SNMP software, developed by Cisco, is also used by many administrators. It would be more logical to use it with Cisco brand devices.
SolarWinds SNMP software is very successful in this regard. But the only disadvantage is that it is paid.
4. PowerSNMP Free Manager
PowerSNMP software is free and useful. Using PowerSNMP Free Manager is quite simple. You can send reports to your Email address by creating traps.
You can find a lot SNMP software on the Internet…
What is SNMP Protocol in Networking? – In this article, we have discussed Simple Network Management Protocol. After mentioning what is SNMP protocol in networking and what it is useful for, we have mentioned SNMP Softwares.
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