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Designing the Switch/Router
Published in James Aweya, Designing Switch/Routers, 2023
As described in Chapter 2 of this volume, SNMP is an Application Layer protocol for transferring information about managed network devices in an IP network. SNMP operates over UDP as also discussed in Chapter 3 of Volume 1. A network administrator can use SNMP to access information about a managed device such as network packet error rates. This allows the administrator to have a better view of network performance and also carry out troubleshooting/debugging tasks when network problems occur. As discussed in Chapters 5 of Volume 1 and Chapter 2 of Volume 2, an SNMP system consists of three main parts, the SNMP manager, the SNMP agent, and the MIB. The SNMP agent resides on a network device such as a switch, router, or switch/router, while the SNMP manager runs software that is typically implemented as part of a network management system (NMS).
Troubleshooting
Published in Steve Church, Skip Pizzi, Audio Over IP, 2012
On some switches, Simple Network Management Protocol (SNMP) can offer a yet deeper look. SNMP and remote monitoring (RMON) are part of the TCP/IP Internet suite. (RMON is built on SNMP, so they are closely related.) They offer a way to probe and monitor network equipment operation in a vendor-independent way. For example, an Ethernet port has a standard way of communicating its status that is supposed to be used by all products with these ports. Almost all sophisticated Ethernet switches offer these, and they are useful tools to monitor traffic, check operation, etc. To use SNMP and RMON, you will need a software application that presents the information. Hewlett-Packard's OpenView, for example, can do this. (H-P ships a simpler version called TopTools with many of its switches.) The Management Information Base (MIB) is used to organize information within SNMP.
A Survey on Distributed Denial of Service Attack Detection
Published in Amit Kumar Tyagi, Ajith Abraham, A. Kaklauskas, N. Sreenath, Gillala Rekha, Shaveta Malik, Security and Privacy-Preserving Techniques in Wireless Robotics, 2022
SNMP stands for Simple Network Management Protocol, and is used to monitor or manage the network-connected devices. SNMP has two major components: one is manager and another is an agent. Management of network is the interaction between the manager and host. A manager is a host that controls and monitors the agent such as the router. In the application layer the manager can monitor and control different agents, i.e., few managers handle sets of agents. In general, management with SNMP has basic three components: 1. The manager checks the behavior of the agent by requesting information; 2. Resetting the values on the agent database and forcing the agent to evaluate certain functions; 3. The manager gets a warning from the agent about the unusual condition.
Virtualised Environment for Learning SDN-based Networking
Published in IETE Journal of Education, 2020
Oscar Polanco, Fabio G. Guerrero
The functionality of the control plane in the layers two and three of the OSI (Open System Interconnection) model determines the treatment given to packets on their path from their origin to destination. This task is performed, for instance, by the STP (Spanning Tree Protocol) in layer 2 and by routing protocols such as OSPF (Open Shortest Path First) and BGP (Border Gateway Protocol) in layer 3, which works on the principle of distributed control. In a majority of networking equipment, high level management policies are traditionally programmed through low-level commands, and are specific to each manufacturer. While the SNMP (Simple Network Management Protocol) protocol is helpful in monitoring and configuring equipment using this traditional method, it is neither possible nor easy to flexibly handle high-level routing policies.
Smart building energy management based on network occupancy sensing
Published in Journal of International Council on Electrical Engineering, 2018
Xianing Jin, Guanqun Wang, Yi Song, Chongbo Sun
Type II sensor includes the addition of software to existing infrastructure to make existing occupancy related data available. The most widely used type II sensor is Wi-Fi devices. Wi-Fi can be used to locate occupants in a building where software on user hosts report all the available APs and their respective signal strengths. Another indication of occupancy is keyboard and mouse use. Operating systems provide functions to detect input activity but additional software is needed to collect this activity and make it available remotely. This information is made available remotely using the Simple Network Management Protocol (SNMP). SNMP provides a standard way to centrally gather the information recorded by the PC Activity Monitor on various computers. Since employees always spend most of their time in their private office where their PCs are located, monitoring computer activity would be a good predictor of total building occupancy.
A Comprehensive Review on Level 2 Charging System for Electric Vehicles
Published in Smart Science, 2018
Saadullah Khan, Samir Shariff, Aqueel Ahmad, Mohammad Saad Alam
The EVs are showcased as distributed and mobile storage devices especially in the V2G environment. Their optimal placement and selection in power exchange market (e.g. bilateral, day ahead and DISCOM) is explained in [127]. To incorporate the irregular pattern of EVs penetrating in the distribution system, the battery status of each EV should be supervised and controlled in real time by smart grid itself. At present, the battery status of each EV is only maintained by the controller area network (CAN) technology of the on-board battery management system (BMS) [128]. The Simple Network Management Protocol (SNMP) is an essential protocol in several CAN applications.