CN1536849A - A method for realizing network clock synchronization in the whole network of network management - Google Patents

Abstract

The invention refers to network managing field, which solves the clock synchronization problem between the managing device and the managed device in the system. The invention is a clock synchronization realizing method in the whole network, the external network includes network managing server and the managed devices, the network managing server has a network managing proxy working station, the character lies in: a. the network managing server acquires the standard time from the parent clock source; b. the network managing working station acquires the standard time from the network managing server timely, and sets the time at local; c. the managed devices acquire time from clock source board, and report to the network managing proxy working station timely, and the network managing proxy working station examines and reports the time and carries on process. The invention solves the clock synchronization problem, eliminates the data distortion phenomenon, and upgrades the accuracy of the system synchronization time.

Description

A method for realizing network clock synchronization in the whole network of network management

technical field

The invention relates to the field of network management, in particular to the problem of time synchronization between managed equipment and the network management system in the network management system.

technical background

The managed equipment and the operation and maintenance center (OMC) and the network management system belong to different networks and have different time sources. The current solutions are mainly as follows:

1. There is no synchronization time at all;

2. Synchronize the managed device with the time of the network management server;

3. Synchronize the whole network time with CKS;

analyse as below:

1. If there is no synchronization, the network management operation data will be distorted, mainly due to the distortion of time-related data, such as traffic statistics, alarm information, etc., and the data between multiple managed devices that are not synchronized in time is not comparable (because the network management needs to collect data from multiple managed devices); this situation is more common.

2. The network management server exists in the form of a high-performance SUN workstation or minicomputer in practical applications, but it is difficult to ensure the accuracy of time without an external clock source.

3. The CKS clock is synchronized with the superior clock source, but the absolute time is not accurate. In practical applications, there is a phenomenon of CKS time jump.

In practical applications, the network management system and the managed equipment adopt their own time systems. The managed equipment generally adopts the CKS time, while the network management system uses the time of its own server. This creates a problem: a network has two sets of time sources. However, the data source of the network management system is the mainframe and the OMC background system, which causes the time of operation or query on the network management system to be different from the time when the data is actually generated, which makes the data "distorted".

Contents of the invention

The purpose of the present invention is to solve the problem that the time of the network management server and the time of the managed equipment are not synchronized in the network management system, and propose a method to solve the problem of unification of two time sources and guarantee accuracy.

A network management network-wide clock synchronization implementation method, the external network environment includes a network management server and managed equipment, the network management server is equipped with a network management agent workstation, characterized in that:

a. The network management server obtains the standard time through the superior clock source;

b. The network management agent workstation regularly obtains the standard time from the network management server and sets it locally;

c. The managed device obtains the time from the clock board (CKS ClocK Source board), and regularly reports to the network management agent workstation, which checks and processes the reported time.

In the described step a, the superior clock source of the network management server is the GPS global positioning system, and the GPS sends the standard time to the network management server through the UTC Universal Time Coordinated (UTC Universal Time Coordinated) program.

In the step a, the upper-level clock source of the network management server is the upper-level network management server, and after obtaining the standard time information, the upper-level network management server sends it to the network management server.

In the step c, the content to be processed is:

The network management agent workstation checks the reported time and compares it with the local time. If it exceeds the set threshold, the internal protocol is used to correct the internal time of the managed device.

The method for implementing network-wide clock synchronization of the network management system further includes correcting the CKS time by the bottom module of the managed device if the set threshold is exceeded.

The method for realizing clock synchronization of the entire network of the network management also includes that the bottom module of the managed device regularly obtains the CKS time, and compares it with the local time. Workstation time prevails.

The managed device is a switch.

In the described step b, the network management agent workstation regularly obtains the standard time from the network management server, which is accomplished through the Simple Network Time Protocol (SNTP Simple Net Time Protocol).

The transfer of information between the managed device and the network management agent workstation is accomplished through the Transmission Control Protocol (TCP Transfer Control Protocol) protocol.

Due to the adoption of the time synchronization method of regularly collecting and modifying the time information between the network management system time and the managed equipment of the present invention, the problem of time asynchrony between the network management system and the managed equipment is solved, and the data "distortion" is relatively completely eliminated. " phenomenon, simultaneously because adopt GPS time as standard time in the scheme of the present invention, have improved the precision and the accuracy of system synchronous time greatly.

Description of drawings

Fig. 1 is the network structural diagram of network management system of the present invention;

Fig. 2 is a network structure diagram of a network management system adopted by the present invention;

Fig. 3 is a network structure diagram of another network management system adopted by the present invention.

Detailed ways

The specific implementation manners of the present invention will be described below in conjunction with the accompanying drawings.

As shown in Figure 1, a network structure diagram that the present invention adopts, as shown in the figure, a network management server needs to manage multiple types of network element equipment, such as switches, routers, etc., and connects several network management agent workstations through a local area network. In the example, it is specifically the background management module (BAM, Back AdministrationModule). A time synchronization process is stored in the BAM as a resident process, and is started to run. Server synchronization time; BAM and network management server use SNTP time synchronization protocol for time synchronization. The data transmission between the managed device and the managed device is completed through the TCP protocol. The network management server is connected to the upper-level clock source. According to the networking form, the upper-level clock source can be the GPS system or the upper-level network management server.

If GPS is used as the upper-level clock source, as shown in Figure 2, the following scheme is adopted:

The GPS receiving card receives satellite signals through the antenna and separates them to obtain date and time information. The UTC Universal Time Coordinated software obtains the standard date and time through the interface commands of the GPS receiving card to set the time of the network management server. UTC is a general purpose here. The software reads data regularly from the hardware card (GPS card) and parses it into time; a time synchronization server process is needed here, which is also a simple program. The time synchronization server process is a service process that processes external time Synchronization request, send the machine time to the requester in the format of SNTP protocol. In the prior art, there are many such programs, which will not be described in detail here.

The BAM in Figure 1 belongs to the category of OMC, which is equivalent to the agent process of the network management. It is responsible for data loading, data collection, management and forwarding of the managed devices. The time synchronization process is started as a resident process of the BAM. It uses the SNTP protocol to time Obtain the time from the network management server and set the time of the BAM machine. The managed device reports the time to BAM regularly after obtaining the time from the clock board (CKS ClocK Source board). BAM checks the reported time. If it exceeds a certain amount of local time, it immediately adopts the internal protocol to set the internal time of the managed device. The underlying module (generally an operating system OS, such as a switch OS) immediately corrects the CKS time.

As an improved solution of the present invention, the underlying module OS of the managed device is also designed to obtain the CKS time regularly. If the difference between the time of the CKS and the local time exceeds a specified value, for example, the threshold can be set to 2 minutes. When the detected If the CKS time and the local time exceed 2 minutes, it is considered that the CKS has jumped, so the BAM time shall prevail immediately.

Although the managed device usually takes the CKS time as the standard, but when it jumps or the time is far from the BAM time, the BAM time is still the standard.

In order to save costs, if a network management server in the network has been connected to the GPS system, it can directly synchronize with the upper-level network management server. The networking form is shown in Figure 3.

The host time is usually based on the CKS time to avoid frequent time adjustments, and it is also conducive to better implementation of the solution, because the host generally uses the CKS time as the standard in practical applications.

Due to the importance of the network management server, the network between the BAM and the network management server must remain connected, otherwise an alarm must be generated to remind the user to restore.

Looking at the whole process, GPS time ---> network management server time ---> BAM time ---> managed device time ---> CKS time, GPS time becomes the unified time of the whole network.

Due to the adoption of the time synchronization method of regularly collecting and modifying the time information between the network management system time and the managed equipment of the present invention, the problem of time asynchrony between the network management system and the managed equipment is solved, and the data "distortion" is relatively completely eliminated. " phenomenon, simultaneously because adopt GPS time as standard time in the scheme of the present invention, have improved the precision and the accuracy of system synchronous time greatly.

The above is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed in the present invention can easily think of changes or Replacement should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention should be determined by the protection scope of the claims.

Claims (9)

1, a kind of network management whole network clock synchronization realization method, external network environment comprises network management server and managed equipment, and this network management server has network management agent workstation, it is characterized in that: a. The network management server obtains the standard time through the superior clock source; b. The network management agent workstation regularly obtains the standard time from the network management server and sets it locally; c. The managed device obtains the time from the clock board (CKS ClocK Source board), and regularly reports to the network management agent workstation, which checks and processes the reported time. 2, the method for realizing clock synchronization of the whole network of network management as claimed in claim 1 is characterized in that in the described step a, the superior clock source of the network management server is the GPS global positioning system, and GPS passes UTC (UTC Universal Time Coordinated) The program sends the standard time to the network management server. 3. The method for realizing clock synchronization in the entire network of network management as claimed in claim 1, wherein in said step a, the upper-level clock source of the network management server is the upper-level network management server, and after the upper-level network management server obtains the standard time information, it sends it to the network management server. 4, as claimed in claim 1, 2 or 3 described network management whole network clock synchronization implementation method, it is characterized in that in the described step c, the content of processing is: The network management agent workstation checks the reported time and compares it with the local time. If it exceeds the set threshold, the internal protocol is used to correct the internal time of the managed device. 5. The method for achieving clock synchronization across the network management network as claimed in claim 4, characterized in that if the set threshold is exceeded, the bottom layer module of the managed device corrects the CKS time. 6. The method for implementing clock synchronization of the network management network as claimed in claim 1, 2 or 3, characterized in that it also includes that the bottom module of the managed device regularly obtains the CKS time and compares it with the local time, if the time of the CKS is detected If the difference with the local time exceeds the set threshold, the time of the network management agent workstation shall prevail. 7. The method for realizing clock synchronization of the network management network as claimed in claim 1, 2 or 3, characterized in that the managed device is a switch. 8, as claimed in claim 1, 2 or 3 described network management whole network clock synchronization implementation method, it is characterized in that in the described step b, network management agent workstation regularly obtains standard time from network management server, is to pass Simple Network Time Protocol (SNTP Simple Net Time Protocol) to complete. 9. The network management network clock synchronization implementation method according to claim 1, 2 or 3, characterized in that the transfer of information between the managed device and the network management agent workstation is through the transmission control protocol (TCPTransfer Control Protocol) agreement to complete.

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