In large-scale network management, the headache of network administrators is how to understand the health status of network devices that are not present in real time. It is obviously not very realistic to look at the operation status of network devices one by one. In the actual network, the SNMP protocol is the most widely used method to automatically help administrators collect network health status. In this way, network administrators only need to sit in their place and know the health of network equipment across the company.
With the in-depth development of digitalization and networking, more and more products need to be connected to the Ethernet network through the standard SNMP protocol in the power supply and distribution system of modern data center computer rooms, and the equipment such as UPS (uninterruptible power supply), air conditioner, diesel engine, power distribution cabinet and cabinet PDU can be managed by NMS (network management system) to significantly improve development efficiency, reduce access and debugging costs, and flexibly and conveniently manage and adjust related equipment.
SNMP, like RS485, is a communication protocol used in industrial sites. The difference is that RS485 is a serial communication protocol, which is suitable for LAN or short-distance communication, with high reliability and stability. SNMP is a network management protocol based on the TCP IP protocol, which can realize the monitoring and control of network devices, and has Internet-level scalability and cross-domain functionsSecondly, RS485 is mainly used for real-time data collection and transmission, while SNMP is mainly used for remote monitoring and management, such as centralized data centers, operator network equipment management, etc.
An SNMP management network consists of three key components: NMS (Network Management System), managed devices, and agents, which specify a standardized management framework for monitoring and managing devices in the network environment, a common language for communication, and corresponding security and access control mechanisms. Network administrators can use the SNMP function to query device information, modify device parameter values, monitor device status, automatically find faults, and generate reports
1) Based on the standard protocol of TCP IP Internet, the transport layer protocol generally adopts UDP;
2) Automated network management. Network administrators can use the SNMP platform to retrieve information, modify information, find faults, complete fault diagnosis, perform capacity planning, and generate reports on nodes on the network
3) Shield the physical differences of different equipment and realize the automatic management of products from different manufacturers. SNMP provides only the most basic set of functions, making the management task relatively independent of the physical characteristics and actual network type of the managed device, so as to realize the management of devices from different vendors
4) A combination of simple request-reply mode and active notification mode, and there is a timeout and retransmission mechanism
5) There are few types of packets, and the format of packets is simple, easy to parse, and easy to implement
6) SNMP v3 provides authentication and encryption security mechanisms, as well as user- and view-based access control functions to enhance security. 
TOWE TCP IP and SNMP protocol intelligent power remote manager are intelligent cabinet PDU products that have been developed by TOWE Technology Co., Ltd. (TOWE) for many years in the field of electrical connection and protection of terminal equipment. This series of products conforms to the development trend of future power distribution monitoring and management technology in the future world, adopts the latest core technology with completely independent intellectual property rights, integrates network communication, power distribution, power metering and other technologies, and meets the needs of high-end computer rooms and data center software intelligent power distribution and environmental monitoring systems.
The same technology (TOWE) SNMP protocol intelligent PDU, there are a variety of products with different control modes of total monitoring and sub-monitoring, intelligent monitoring and display of PVU voltage, total current, electric energy, power, power factors and other parameters when working, with temperature and humidity interface, cascade interface, support hot-swap function, can be customized on demand, and can also be accessed to TOWE cloud platform management operation for free, which can run independently on an IP network, or can be networked to form a centralized management of remote power distribution, Environmental monitoring system.
towe snmpProtocol-intelligent Smart PDUssetting
丨Communication:RS485, TCP IP, Web access, SNMP setting function, Telnet SSH setting function, etc
丨Configuration:Sprayed plastic shell, standard cabinet horizontally, support cascade (10), hot swap, horizontal and vertical screen switching, software remote upgrade log export, etc.;
丨Product features
(1) Control function:The product is highly integrated with measurement, digital communication, etc., and can complete power measurement, acquisition, transmission, branch control and measurement, support remote control of each port switch, and view output socket parameters.
(2) Setting function:The upper and lower limits of the PDU load current can be set, and the upper and lower values of ambient temperature and humidity can be setAddress settings for email alarms and HTTP network servicesSNMP settings;Network parameter settings (IP, gateway, mask, DNS).
(3) Alarm function:When the load current, ambient temperature and humidity exceed the rated value, the alarm will automatically alarm, and the alarm type is buzzer beep;The LCD value flashes;Automatically send e-mail to the system administratorSNMP sends a trap alert status messageThe serial port communication background sends alarm status information
(4) Management function:Username and password login settings
(5) Cascade function:It has RJ45 network port, which can be connected through TCP IP or RS485 network, and can be cascaded to other devices through network port.
Access to the Towe SNMP intelligent Smart PDU
(1) HTTP access:Check the IP address of the device, view the IPv4 address, IPv4 subnet mask, and IPv4 default gateway of the device through the LCD display, and modify the IPv4 address, IPv4 subnet mask, and IPv4 default gateway of the local computer to make the device and the local computer on the same LAN: ahttp login page, bOpen a browser and enter the IP address of the device in the address bar. (2) SNMP protocol:i-PDU supports SNMP secondary development protocol and supports V1, V2C, and V3 versionsYou can configure the configuration according to the SNMP configuration pageIn the secondary development, please refer to the SNMP OID documentation for the description of the corresponding OID. (3) Telnet UDP access:TOWE I-PDU provides a Telnet UDP secondary development interface, Telnet UDP uses a simple command line mode, which can be quickly operated and mastered, and during the secondary development process, you can view the Telnet UDP command line detailed documentation. (4) Modbus access:The TOWE I-PDU provides serial interface access and supports Modbus access, see Modbus-RTU protocol for details. 
The SNMP protocol intelligent smart PDU completely breaks the constraints of interval and region, and the security and reliability of the computer room as the basic carrier of information services are becoming more and more important. Due to the large number of computer room systems and complex management, through intelligent management, it can meet the needs of intelligent power distribution and environmental monitoring systems for high-end computer rooms and data center software, realize centralized management, reduce the management pressure of operation and maintenance personnel, and achieve cost reduction and efficiency increase.