“With the advancement of IP technology, data communication networks have developed rapidly. In the NGN/3G era, the status of the IP bearer network is very important, so how to effectively manage the data communication network is an important topic that must be studied in the operation and maintenance work.
With the advancement of IP technology, data communication networks have developed rapidly. In the NGN/3G era, the status of the IP bearer network is very important, so how to effectively manage the data communication network is an important topic that must be studied in the operation and maintenance work.
The Tietong data communication network uses NE80, S8016, MA5200, S8505 and other equipment. In addition to the traditional maintenance methods of logging in equipment, effective tools must be used to improve operation and maintenance efficiency.
This article introduces the operation and maintenance management of the data communication network from seven aspects: network element management, topology management, fault management, resource management, performance management, network flow collection and analysis, and network service management.
1. Network element management
The network element is the basic management element in the telecommunication management network (TMN) architecture. In the data communication network, it generally refers to equipment such as routers and switches.
The network element network management is the most “simple” network management, providing the basic functions of remote device management. Maintenance personnel can view the device panel, port status, and some protocol data through it, and can perform basic operations such as VLan configuration, interface shutdown, and undo shutdown. Some network element network management software also provides short-period performance monitoring functions, which can monitor equipment, interfaces, etc., and the monitoring results are output in the form of histograms, broken line graphs, etc. Maintenance personnel can understand the status of IP, TCP, UDP, ICMP and other messages, and can grasp the interface bandwidth utilization rate, received packet error rate and other information.
It should be noted that although this type of performance monitoring can be output in real time, its overall monitoring cycle is relatively short and cannot meet the requirements of large-scale network performance management.
2. Topology management
With the development of the network scale and the increasingly complex network structure, maintenance personnel need a topology management system to accurately grasp the network topology.
Topology management is used to construct and manage the topological structure of the entire network. Maintenance personnel can understand the operation of the entire network in real time by browsing the network topology view.
Constructing a topological graph in a small network can view the overall picture of the network, but the network structure is extremely complicated after a large number of network devices increase, and it is no longer practical to use a topological graph to view the network. In this case, multiple regions need to be divided for topology management, such as dividing devices into different submaps according to different regions.
Huawei’s Data Management System (DMS) not only provides a physical view of the network divided by region, but also provides an IP view of the network divided by IP network segments. The physical view and the IP view are two relatively independent topology views, which provide different perspectives for the management network.
According to different management requirements, the use of topology view zoom, topology view automatic layout, topology filtering and other functions can simplify network maintenance.
3. Fault management
Dealing with emergency network failures is an important task for network operation and maintenance personnel, and timely detection of failures is a prerequisite for ensuring the effective development of this work. The application of DMS can effectively sense faults. And assist in fault location.
DMS fault management includes two parts: alarm management and SysLog management.
3.1 Alarm management
Ordinary alarm management is when the network management receives a trap message from the device to generate an alarm, but in the case of packet loss on the network or the device’s uplink interface is down, the network management server may not receive the trap message. If this happens, it will cause maintenance personnel to delay the best time to recover from the fault because they cannot receive the alarm in time.
In response to this situation, DMS combines the topology function with the alarm function, and provides the snmp round-robin and ping round-robin working methods, which can ensure that the source of the fault can be found in time when the Trap message is not received.
The main functions of alarm management include: real-time monitoring of alarm information and operating information, query of equipment historical alarm information and operating information, query and configuration of equipment alarm information, etc.
3.2 SysLog management
SysLog management provides a way to view SysLog information through the network management, simple and convenient. It can save device log information for a long time to avoid the loss of important log information due to insufficient device buffer size.
4. Resource management
In a large-scale IP network, the network structure is complex and the number of devices is huge. Network operation and maintenance personnel need to master the basic information of the resources of the equipment (such as equipment, boards, subcards, ports, interfaces, links, etc.) in the network, as well as abnormal resource information in the network. The resource management function of the network management system can help complete the work, and can directly export the resource data in the network into html, txt, csv format files, which is convenient for maintenance and management of network resources.
5. Network performance management
To better manage and improve the operation of the network, network operation and maintenance personnel also need to master network traffic and some other performance indicators, and be able to monitor and analyze the indicators for a long time, so as to prevent them in advance and take precautions. Professional network performance management tools can assist in this.
DMS-IP Network Performance Manager and TrafficView are tools commonly used by network operation and maintenance personnel. TrafficView is relatively simple and will not be introduced here.
DMS-IP Network Performance Manager can monitor the performance of large-scale IP networks. It mainly realizes the collection of the performance indicators of the CPU occupancy rate and memory occupancy rate of devices and boards, the collection of performance indicators of the inbound/outbound traffic of links and interfaces, and the inbound/outbound bandwidth utilization performance indicators, as well as the delay between devices. Collection of performance indicators for jitter and packet loss rate. The related collection information can be output through the report system.
Operation and maintenance personnel can deploy multiple mesh, star or even point-to-point test points (network performance collection and test benchmark points, generally a piece of equipment) on the network to collect and analyze performance data, as shown in Figure 1. Shown.
Figure 1 Schematic diagram of network performance manager
Through IP network performance management, operation and maintenance personnel can understand the operation of the network by viewing performance data, images, etc. In addition, thresholds for performance data can be set. When the performance data exceeds the limit, maintenance personnel can be reminded to check the network status and make adjustments in time. To avoid problems.
6. Network traffic collection and analysis tool
In network operation and maintenance, sometimes it is necessary to know which users visit external networks frequently, which network segments frequently visit each other, which websites provide a large number of external data services, and certain types of traffic abnormalities. You can use the network Stream collection and analysis tools realize this function.
The so-called NetStream is a one-way packet sequence from a specific source device to a specific destination device. It is composed of a series of IP data packets identified by several keywords. The keywords include source address, destination address, source port, destination port, protocol type, etc. These keywords are the basis for network traffic analysis. For example, the typical characteristics of the NetStream streaming data of the oscillating virus are: the destination port 445, the protocol type TCP, and the number of bytes 48.
Through the collection and analysis of network flow, it can provide support for traffic engineering analysis, network design optimization, and network security monitoring in operation and maintenance.
7. Network business management
The development of IP network technology is changing with each passing day. MPLS VPN technology has increasingly become the new darling of the times, which also puts forward higher requirements for operation and maintenance.
The network maintenance of MPLS VPN involves customer management, VPN business management, network management and other tasks. Traditional manual management is easy to cause configuration errors. Once a configuration error occurs, it is difficult to detect, and it is difficult to perform business monitoring and fault location. Can not effectively manage VPN customers, management efficiency is low, can not meet the growing business needs.
Huawei VPN Manager service management system can realize the whole process from MPLS VPN service planning to service deployment, service audit, service guarantee, and service dismantling, effectively reducing the complexity of MPLS VPN service management and improving the efficiency of operation and maintenance.
All in all, data communication network operation and maintenance does not require a very advanced theoretical knowledge background. As long as you adopt appropriate methods and effective network management tools, you can grasp network resources, network abnormalities, network performance, network flow conditions, and business deployment in time. Such practical information can greatly improve the efficiency of network management through this information.