CN100438454C - Method for detecting continuity of ethernet network operation and maintenance - Google Patents

Abstract

The present invention discloses a method for detecting the continuity of Ethernet network operation and maintenance. When a destination end detects that a path between a source maintenance associated end point and a destination maintenance associated end point is changed, the destination end reports a 'path change ' alarm to network manager. After the destination end reports the 'path change' alarm to the network manager, when the destination end detects that the path between the source maintenance associated end point and the destination maintenance associated point is recovered, the destination end reports the recovery of 'path change'alarm to the network manager, wherein the detection of the path change is determined based on three continuous detected results different from a detection standard, and the recover of the path change is determined based on three continuous results identical to the detection standard. The method for detecting the continuity of the Ethernet network operation and the maintenance solves the problem that the path between the source maintenance associated end point and the destination associated point is updated but the destination end dose not report the alarm.

Description

A Method for Detection of Ethernet Operation and Maintenance Continuity

technical field

The invention relates to an Ethernet operation and maintenance continuity detection mechanism, and more specifically relates to a new Ethernet operation and maintenance continuity detection method.

Background technique

The existing Ethernet operation and maintenance continuity detection mechanism is mainly to regularly send unresponsive continuity detection packets through the source end maintenance associated endpoint, and the sink end maintenance associated endpoint regularly detects whether the source end continuity detection packet is received. Determine whether the entire path is faulty. If the sink end does not receive the continuity detection message within three consecutive time periods, the sink end reports an alarm to the network management system. The standard stipulates that the time interval for the source to send a continuity check can be selected from 1 millisecond to 60 seconds.

Figure 1 is a schematic diagram of continuity detection. As shown in Figure 1, when a link fails, the sink-side maintenance association endpoint will not receive the continuity detection message, thus triggering an alarm.

Figure 2 is a defect map of the existing method. As shown in Figure 2, there are four maintenance association endpoints, and the time interval for sending continuity detection is assumed to be greater than 500 milliseconds. Assume that according to the spanning tree algorithm, the management status of links AB and EF is on, and the management status of link CD is off. Then under normal circumstances, the path from MEP1 to MEP2 is H—I—K—J—A—B—M—N.

Consider MEP1 as the source end and MEP2 as the sink end. If link AB fails, MEP2 will not report an alarm to the NMS. The reason is that the rapid spanning tree algorithm will set the management state of CD to open within seconds, so the message sent by MEP1 will pass the path H——I——K——J——C—— within the specified time D—F—E—M—N arrives at MEP2, of course, one or two continuity detection packets may be lost.

The occurrence of the above-mentioned problem of "the path between the source and sink maintenance associated endpoints has been updated, but the sink has not reported an alarm" is relatively serious. On the one hand, for MEP1, MEP2, MEP3, and MEP4, the AB path is preferred. When the AB path fails, the continuity detection mechanism will not report an alarm to the network management system. On the other hand, even if an alarm is reported to the network management by other mechanisms, such as links, spanning trees, etc., it is impossible to accurately know the affected maintenance association endpoints. For example, in the above example, there is no impact between MEP1, MEP2, and MEP3.

The Institute of Electrical and Electronics Engineers' latest draft standard does not mention the handling of the above issues, which should be a relatively large defect.

Contents of the invention

The technical problem to be solved by the present invention is to provide a new Ethernet operation and maintenance continuous sexual detection method.

The technical solution adopted by the present invention to solve the technical problems is: a method for detecting continuity of Ethernet operation and maintenance, characterized in that, comprising the following steps:

S1) The sink compares the maintenance association intermediate point information contained in the received continuity detection message with the detection standard, so as to detect whether there is a path change between the source and sink maintenance association endpoints;

S2) If the maintenance association intermediate point information contained in the first number of continuity detection messages received continuously is different from the detection standard, indicating that there is a path change between the source and sink maintenance association endpoints, then the sink end reports to the network management "Path change" alarm, otherwise, return to step S1) until the end of the detection message;

S3) If the sink end has reported the "path change" alarm to the network management, the sink end detects whether the path between the source and sink maintenance associated endpoints is restored;

S4) If the sink detects that the path between the source and sink maintenance associated endpoints has been restored, it will report the "path change" alarm to the network management and recover.

In the Ethernet operation and maintenance continuity detection method of the present invention, said S3) includes the following steps: after the sink reports the "path change" alarm to the network management, if the continuous detection receives the first number of the above-mentioned The continuity detection message whose information of the maintenance association node is the same as the above detection standard indicates that the path recovery between the source and sink maintenance association endpoints is detected.

In the Ethernet operation and maintenance continuity detection method of the present invention, the following steps for forming the detection standard are also included:

S51) After receiving the first continuity detection message of a specific maintenance-related endpoint, the sink-side maintenance-related endpoint stores the address information and port number information of the maintenance-related intermediate points recorded along the way into the database of the above-mentioned sink-side maintenance-related endpoint ,

S52) If the corresponding information of the maintenance-related intermediate points recorded in the first number of consecutive continuity detection messages in the above database is all the same, record the same information as the detection standard.

In the Ethernet operation and maintenance continuity detection method of the present invention, the above address information is an access control address or a maintenance associated point identifier.

In the Ethernet operation and maintenance continuity detection method according to the present invention, the first number is three.

In the Ethernet operation and maintenance continuity detection method described in the present invention, the following steps are also included: at the maintenance association intermediate point between the source and sink maintenance association endpoints, when transmitting the above-mentioned continuity detection message to the downstream, an additional This maintenance association intermediate point corresponds to the address information and the type length value composed of the port number.

In the Ethernet operation and maintenance continuity detection method of the present invention, when the above-mentioned type length value exceeds a certain value, the received continuity detection message is discarded, and the continuity detection message is not sent downstream.

In the Ethernet operation and maintenance continuity detection method of the present invention, it also includes the step of configuring corresponding information interfaces for the maintenance-related intermediate points along the way.

In the Ethernet operation and maintenance continuity detection method of the present invention, the address information is an access control address or a maintenance associated point identifier.

The implementation of the Ethernet operation and maintenance continuity detection method of the present invention has the following beneficial effects: the problem of "the path between the source and sink maintenance associated endpoints has been updated, but the sink has not reported an alarm" is solved.

Description of drawings

The present invention will be further described below in conjunction with accompanying drawing and embodiment, in the accompanying drawing:

Fig. 1 is the schematic diagram of continuity detection;

Fig. 2 is the defect map of existing method;

Fig. 3 is a state transition diagram of the Ethernet operation and maintenance continuity detection method of the present invention;

Fig. 4 is a database of maintenance associated endpoints, and a diagram providing a detection standard for configuring the latest received along-way maintenance associated intermediate point information;

Fig. 5 is the view of the continuity detection message of the present invention;

Detailed ways

Fig. 3 is the state transition diagram of Ethernet operation and maintenance continuity detection method of the present invention, and S represents to receive the continuity detection message that contains the information of the maintenance correlation intermediate point and detection standard identical; D represents to receive the maintenance that contains The information of the associated intermediate point and the continuity detection message with different detection standards. As shown in Figure 3, first in the alarm recovery state 301, the sink receives a continuity detection message, and compares the maintenance association intermediate point information contained in it with the maintenance association end point database record, if the maintenance association intermediate point information and If the records in the maintenance association endpoint database are different, enter the intermediate state 302; if they are the same, maintain the alarm recovery state. If it is in the intermediate state 302, the sink receives another continuity detection message, and compares the maintenance association intermediate point information contained in it with the maintenance association end point database record, if the maintenance association intermediate point information and the maintenance association end point database record are not If they are the same, enter the intermediate state 303; if they are the same, return to the alarm recovery state. If it is in the intermediate state 303, the sink receives another continuity detection message, and compares the maintenance association intermediate point information contained in it with the maintenance association end point database record. If the maintenance association intermediate point information and the maintenance association end point database record are not If they are the same, enter the "path change" alarm state 304; if they are the same, return to the alarm recovery state.

If it is in the "route change" alarm state 304, the sink receives another continuity detection message, and compares the maintenance association intermediate point information contained in it with the maintenance association end point database record. If the maintenance association intermediate point information and the maintenance association If the endpoint database records are the same, enter the intermediate state 305; if not, maintain the "route change" alarm state. If it is in the intermediate state 305, the sink receives another continuity detection message, and compares the maintenance association intermediate point information contained in it with the maintenance association end point database record, if the maintenance association intermediate point information and the maintenance association end point database record are the same , then enter the intermediate state 306; if not the same, return to the "route change" alarm state. If it is in the intermediate state 305, the sink receives another continuity detection message, and compares the maintenance association intermediate point information contained in it with the maintenance association end point database record, if the maintenance association intermediate point information and the maintenance association end point database record are the same , then enter the alarm recovery state; if not, return to the "route change" alarm state.

Fig. 4 is a maintenance correlation end point database and a diagram providing a detection standard for configuring the latest received along-way maintenance correlation intermediate point information. As shown in Figure 4, starting from receiving the first continuity detection message of a specific maintenance association endpoint identifier, the sink maintenance association endpoint needs to store the address information of the maintenance association intermediate point plus the port number information recorded along the way into the In the maintenance association endpoint database 401 , if the corresponding information of the maintenance association intermediate points recorded along the way of three consecutive continuity detection messages is the same, record the corresponding information of the maintenance association intermediate points as the subsequent detection standard 402 . The above address information is a media access control address or a maintenance association point identifier.

Due to various reasons, the intermediate points of the maintenance association along the route may change. In this case, an interface for configuring the information of the intermediate points of the maintenance association along the route is provided.

Fig. 5 is a view of the continuity detection message of the present invention. As shown in Figure 5, when the maintenance association intermediate point transmits the above-mentioned continuity detection message downstream, it adds the type length value 501 formed by the media access control address of the maintenance association intermediate point plus the port number; continue to transmit downstream Add Type Length Value 502, Type Length Value 503, Type Length Value 504, Type Length Value 505. Maintaining the association intermediate point needs to detect the received continuity detection message. If the number of type and length values exceeds a certain value, the received continuity detection message will be discarded and the continuity detection message will not be sent downstream.

Claims (9)

1, a kind of ethernet operation and maintaining continuous detection method is characterized in that, may further comprise the steps:

S1) the continuity detection messages of Su Duan to receiving compares its maintenance association interim point information and examination criteria that comprises, and has or not path change thereby detect between source, the place maintenance association end points;

S2) if the maintenance association interim point information that first quantity of receiving a continuously continuity detection messages comprises all is different from described examination criteria, show between source, the place maintenance association end points path change is arranged, then the Su Duanxiang webmaster reports " path change " alarm, otherwise, return step S1) finish up to detection messages;

S3) if Su Duan reports " path change " alarm to webmaster, whether recover in the path between place end detection resources, the place maintenance association end points;

S4) recovered then reported " path change " alarm clearing if Su Duan detects between source, the place maintenance association end points path to webmaster.

2, ethernet operation according to claim 1 and maintaining continuous detection method, it is characterized in that, described S3) may further comprise the steps: Su Duan is after reporting " path change " alarm to webmaster, if continuous detecting is received first a quantity above-mentioned maintenance association nodal information continuity detection messages the same with above-mentioned examination criteria that comprises, represent that then recover in the path between the above-mentioned source that detects, the place maintenance association end points.

3, ethernet operation according to claim 2 and maintaining continuous detection method is characterized in that, also comprise the following steps that are used to form described examination criteria:

S51) place end maintenance association end points begins in first continuity detection messages of receiving the certain maintenance associated end points, deposits address information, the port number information of maintenance association intermediate point of record on the way the database of above-mentioned place end maintenance association end points in,

S52) if the relevant intermediate point corresponding informance of maintenance of continuous first quantity of an above-mentioned lane database continuity detection messages record is all identical, then writing down these identical information is examination criteria.

4, ethernet operation according to claim 3 and maintaining continuous detection method is characterized in that, above-mentioned address information is accessing to control address or maintenance association dot mark symbol.

According to any one described ethernet operation and maintaining continuous detection method among the claim 1-4, it is characterized in that 5, described first quantity is 3.

6, according to any one described ethernet operation and maintaining continuous detection method among the claim 1-4, it is characterized in that, further comprising the steps of: as to be in the maintenance association intermediate point between source, the place maintenance association end points, when transmitting above-mentioned continuity detection messages downstream, the type lengths values that additional this maintenance association intermediate point corresponding address information and port numbers are formed.

7, ethernet operation according to claim 6 and maintaining continuous detection method is characterized in that, when above-mentioned type lengths values outnumbers certain value, then abandon the continuity detection messages of receiving, no longer transmit the continuity detection messages toward the downstream.

8, ethernet operation according to claim 6 and maintaining continuous detection method is characterized in that, also are included as the step of safeguarding relevant intermediate point configuration corresponding informance interface on the way.

9, ethernet operation according to claim 6 and maintaining continuous detection method is characterized in that, described address information is accessing to control address or maintenance association dot mark symbol.

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