WO2017031858A1 - Method and apparatus for detecting time delay state information, and network architecture - Google Patents

Abstract

Disclosed is a method for detecting time delay state information. The method comprises: storing a data table on a source node in advance, wherein the data table contains a correlation between planned detection flow information and link information; generating a flow table on a controller according to the data table, wherein the flow table contains matched detection flow information and action information for processing the detection flow, and the action information is forwarded from a certain interface of a network device; according to the action information for processing the detection flow in the flow table, instructing an intermediate node to forward the detection flow carrying a first time stamp and sent by the source node to a destination node, and determining a second time stamp; and according to the first time stamp and the second time stamp, determining time delay state information about the link information corresponding to the detection flow. By means of the embodiments of the present application, time delay state information between any two nodes in a network architecture can be detected, and a link segment in a time delay state is detected rapidly and accurately, thereby improving the detection efficiency of the time delay state information.

Description

Method and device for detecting delay state information, network architecture

Cross-reference to related applications

The present application claims priority to Chinese Patent Application No. 201510537128.6, filed on Aug. 27, 2015, the entire content of

Technical field

The present invention relates to the field of computer technology, and in particular, to the technical field of detecting delay state information, and in particular, to a method and device for detecting delay state information, and a network architecture.

Background technique

Network quality is one of the most important indicators for Internet companies and operators to measure their own service quality. At present, most network quality monitoring focuses on whether the link is interrupted, and network quality problems caused by line degradation and traffic congestion become monitoring. Blind zone. In addition, in order to make full use of bandwidth, operators and large Internet companies usually adopt a multi-level load balancing network architecture. However, while benefiting from load balancing, it also increases the difficulty of network link quality monitoring covering the entire link, such as services. Traffic is hit on the problem link, but traffic that is monitored or troubled is on the normal link, making troubleshooting difficult.

In the prior art, network devices of various vendors mainly implement load balancing by using a hash algorithm, and specifically, detecting a flow by continuously transforming hash parameters to detect all links. The link information corresponding to the hash parameter is recorded, and the probe stream is re-simulated according to the hash parameter, and the corresponding link information is reproduced, and the delay of the link is obtained by subtracting the time stamps of the servers at both ends.

However, in the prior art, due to the consistency of the hash parameters, the probe data packets consisting of the random transform hash parameters will gradually converge on some links, resulting in the same result returned by a large number of probes, and ultimately cannot be completely covered. Link; when the link changes (for example, bandwidth expansion, link migration), the relationship between the hash parameter and the link is no longer matched, and the relationship between the hash parameter and the link needs to be recalculated. The prior art is based on three layers of hash If the multiple links share an IP address (such as the link bundling technology), each link cannot be detected at this time, and the link in the delay state cannot be detected quickly and accurately.

Summary of the invention

The purpose of the present application is to provide a method and device for detecting delay state information and a network architecture, so as to solve the problem that the link in the delay state cannot be detected quickly and accurately in the prior art.

To achieve the above objectives, the present application provides the following solutions:

In a first aspect, the present application provides a method for detecting delay state information, where the method includes: pre-storing a data table on a source node, where the data table includes a corresponding relationship between planned probe flow information and link information. Generating a flow table on the controller according to the data table, the flow table includes matching probe flow information and action information for processing the probe flow, the action information being forwarded from an interface of the network device; The action information of the probe flow in the flow table, instructing the intermediate node to forward the probe flow that is sent by the source node and carries the first timestamp to the destination node, and determine a second timestamp; A timestamp, and the second timestamp, determining delay state information of link information corresponding to the probe stream.

In some embodiments, after determining the delay state information of the link information corresponding to the probe flow, the method further includes: adding the delay state information to the probe flow in the data table The correspondence between the information and the link information; wherein the data table includes a plurality of entries, each entry records the probe flow information, link information corresponding to the probe flow, and correspondence of the delay state information relationship.

In some embodiments, the link information includes a plurality of link segments, each link segment being a link between two intermediate nodes; the link information is used to instruct the intermediate node to forward the The path of the probe stream.

In some embodiments, the method further includes: receiving delay state information of the plurality of link information corresponding to the plurality of probe flows, wherein the plurality of link information are both the source node and the destination node Link information between the multiple links according to the plurality of probe streams The delay state information of the road information determines a delay link segment between the source node and the destination node.

In some embodiments, the determining the delayed link segment between the source node and the destination node includes: setting a delay threshold; and excluding the chain in which the delay state information is smaller than the delay threshold. Road information; counting a plurality of link segments in the remaining link information to determine the delay link segment.

In some embodiments, the probe stream information is a quad. The quad group includes: a network protocol IP address of the source node, an IP address of the destination node, the source node port, and the destination. Node port.

In some embodiments, the method further includes: receiving a probe stream carrying the first timestamp; determining a second timestamp, the second timestamp being a current time when receiving the probe stream carrying the first timestamp Calculating the delay state information of the link information corresponding to the probe flow according to the first timestamp and the second timestamp; determining the delay state information of the link information corresponding to the multiple probe flows, Delay link segment.

In some embodiments, the method further includes: pre-storing a data table, where the data table includes a correspondence between the probe stream information and the link information; adding the first timestamp to the probe stream, and transmitting the first The timestamp is probed to the switch, and the data table is sent to the controller, so that the controller generates a flow table according to the data table.

In some embodiments, the method further includes: receiving, by the controller, a flow table, where the flow table includes matching probe flow information and action information of the switch processing the probe flow, and the switch performs processing according to the flow table. The action information of the probe stream forwards the probe stream.

In some embodiments, the switch receives the number of flow tables sent by the controller that is greater than the number of ports of the switch.

In a second aspect, the present application provides a device for detecting delay state information, the device comprising: a storage unit, configured to store a data table on a source node in advance, where the data table includes planned probe flow information and a chain Corresponding relationship of the road information; a generating unit, configured to generate a flow table on the controller according to the data table, where the flow table includes matching probe stream information and action information for processing the probe stream, and the action information is a slave network And forwarding, by the forwarding unit, the forwarding unit, configured to: according to the action information of the processing flow in the flow table, instructing the intermediate node to forward the detection flow that is sent by the source node and carries the first timestamp Determining, by the destination node, a second timestamp; determining unit, configured to determine delay state information of the link information corresponding to the probe flow according to the first timestamp and the second timestamp.

In a third aspect, the application provides a network architecture, where the network architecture includes: a source server, configured to pre-store a data table, where the data table includes a corresponding relationship between the probe flow information and the link information; a stamp is added to the probe stream, and the probe stream carrying the first timestamp is sent, and the data table is sent, the first timestamp is a current time when the probe stream is sent, and a controller is configured to receive the The data table sent by the source server, the flow table is generated according to the data table, and the switch is configured to receive the probe flow sent by the source server, and receive the flow table delivered by the controller, where the flow The table includes the matching probe flow information and the action information of the switch processing the probe flow, and the action flow of the probe flow is processed according to the action information in the flow table, and the probe flow carrying the first timestamp is forwarded; a server, configured to determine a second timestamp when the probe stream carrying the first timestamp is received, and calculate the probe according to the first timestamp and the second timestamp Delay state information corresponding to the link information.

In some embodiments, the destination server specifically includes: a receiving unit, configured to receive a probe flow carrying a first timestamp; a determining unit, configured to determine a second timestamp, where the second timestamp is the received The current time when the flow is detected by the first timestamp; the calculation unit is configured to calculate delay state information of the link information corresponding to the probe flow according to the first timestamp and the second timestamp; And a unit, configured to determine a delay link segment according to the delay state information of the link information corresponding to the multiple probe flows.

According to a specific embodiment provided by the present application, the present application discloses the following technical effects:

With the embodiment of the present application, the delay state information between any two nodes in the network architecture can be detected, and the link segment in the delay state is quickly and accurately detected, and the detection efficiency of the delay state information is improved.

Of course, implementing any of the products of the present application does not necessarily require all of the advantages described above to be achieved at the same time.

DRAWINGS

Other features, objects, and advantages of the present application will become more apparent from the detailed description of the accompanying drawings.

1 is a schematic diagram of a network architecture according to the present application;

2 is a flowchart of a method for detecting delay state information according to Embodiment 1 of the present application;

3 is a schematic diagram of detection of delay state information according to the present application;

4 is a flowchart of a method for detecting delay state information according to Embodiment 2 of the present application;

5 is a flowchart of a method for detecting delay state information according to Embodiment 3 of the present application;

Figure 6 is a schematic diagram of a detecting apparatus for delay state information according to the present application.

detailed description

The present application will be further described in detail below with reference to the accompanying drawings and embodiments. It is understood that the specific embodiments described herein are merely illustrative of the invention, rather than the invention. It is also to be noted that, for the convenience of description, only the parts related to the related invention are shown in the drawings.

It should be noted that the embodiments in the present application and the features in the embodiments may be combined with each other without conflict. The present application will be described in detail below with reference to the accompanying drawings.

The embodiment of the present application provides a method and device for detecting delay state information, and a network architecture, which can provide data support for network server measurement load balancing. As shown in FIG. 1 , the network architecture 100 in the embodiment of the present application includes: a source server 101, a controller 102, a switch 103, and a destination server 104, and forwards the probe stream sent by the source server to the destination server through the switch. Determining whether the time when the probe stream reaches the destination server from the source server is delayed, and finding the delay link segment according to the delay state of the multiple link information between the source server and the destination server.

Embodiment 1

FIG. 2 is a flowchart of a method for detecting delay state information according to an embodiment of the present disclosure; FIG. 3 is a schematic diagram of detecting delay state information according to an embodiment of the present application. The execution body of the embodiment may be a network architecture. Referring to FIG. 2 and FIG. 3, the detection of the delay state information specifically includes the following steps:

Step 201: Store a data table on the source node in advance, where the data table includes a correspondence between the planned probe flow information and the link information.

The probe stream information is a quad group, and the quad group includes: a network protocol IP address of the source node, an IP address of the destination node, the source node port, and the destination node port. The quaternion represents a unique probe stream, ensuring that the number of links between the source servers can be detected with enough different probe streams.

The link information includes a plurality of link segments, each link segment being a link between two intermediate nodes; the link information is used to indicate that the intermediate node forwards the path of the probe flow.

Referring to Figure 3, S represents the protocol (English: Internet Protocol, IP for short) address of the network between the source servers; M represents the IP address of the destination server; a, b, c, d, e, and f respectively represent the path corresponding The interface IP address of the switch; the link information abc indicates the interface from the interface whose IP address of switch A is a to the interface whose IP address of switch B is b, and then the IP address of switch C is c.

The data table, for example, Table 1, includes at least the corresponding relationship between the planned probe stream information (t1) and the link information (abc). For example, the entry 1 in Table 1 indicates that the link information of the probe stream t1 from the source server S to the destination server M is abc, that is, the S sends the probe stream t1 to the port a of the switch A, and forwards the probe stream t1 to the switch B. At port b, switch B forwards probe stream t1 to port c of switch C, and switch C forwards t1 to M.

Table I

entry	Source node	Probe flow information	Link information
1	SM	T1	Abc
2	SM	T2	Abf
3	SM	T3	Dbf
......	......	......	......

Step 202: Generate a flow table on the controller according to the data table, where the flow table includes matched probe flow information and action information for processing the probe flow, where the action information is forwarded from an interface of the network device;

In this embodiment, the network device may be a switch, and the action information is used to indicate After the switch receives the probe stream, it should process it. The action information is divided into mandatory actions and optional actions. The mandatory action needs to be supported by the switch by default, and the optional action needs to be notified by the switch. The type of action it can support. For example, the controller generates a flow table and sends the flow table to switch A. The probe flow t1 is forwarded from port a1 of switch A to port b of switch B.

The number of flow tables sent by the controller to the switch is greater than the number of ports on the switch to cover all link information.

Step 203: The action information of the probe flow is processed according to the process in the flow table, and the intermediate node is instructed to forward the probe flow that is sent by the source node and carries the first timestamp to the destination node, and determine the second time. stamp;

Before step 203, the source node adds a first timestamp to the probe stream, and the first timestamp is the current time when the probe stream is sent. The second timestamp is the current time when the probe stream carrying the first timestamp is received. In a specific implementation, the current time of the system where the network architecture is located may be captured when forwarding to the destination node, as the second time. stamp. Similarly, when the probe stream is sent from the source node, the current time of the system where the network architecture is located is captured, and as the first timestamp, the first timestamp is added to the probe stream for transmission.

Step 204: Determine delay state information of link information corresponding to the probe flow according to the first timestamp and the second timestamp.

As described above, it is assumed that the first timestamp carried by the probe stream t1 is 8:30, 1 millisecond, and the second timestamp is 8:32. 2 milliseconds, and the delay state of the link information corresponding to the probe stream t1 is determined. The information is 1 millisecond.

Optionally, after determining the delay state information of the link information corresponding to the probe flow, adding the delay state information to the corresponding relationship between the probe flow information and the link information in the data table The data table includes a plurality of entries, each of which records a correspondence relationship between the probe flow information, link information corresponding to the probe flow, and the delay state information. See Table 2, Table 2 is the data table after adding the delay status information.

Table II

entry	Source node	Probe flow information	Link information	Delay status information
1	SM	T1	Abc	1 millisecond
2	SM	T2		Abf	100 milliseconds

3	SM	T3		Dbf	100 milliseconds
4	SM	T4	Dbc	2 milliseconds
......	......	......	......	......

Optionally, the delay link segment is determined according to the delay state information of the link information corresponding to the multiple probe flows.

Specifically, receiving the delay state information of the multiple link information corresponding to the multiple probe flows, where the multiple link information is link information between the source node and the destination node; Determining delay state information of the plurality of link information corresponding to the plurality of probe streams, and determining a delay link segment between the source node and the destination node.

As shown in the foregoing Table 2, the delay state information of the plurality of link information corresponding to the plurality of probe streams (t1, t2, t3, t4), wherein the plurality of link information are between the SM nodes Link information; according to the entry 2-4, the delay status of the link information abf and the link information dbf are timed out, and the delay status of the link information abc and dbc does not time out, and the delay chain between the SM nodes is determined. The link is bf.

The determining the delay link segment between the source node and the destination node may be: setting a delay threshold; and excluding the link information that the delay state information is smaller than the delay threshold; A plurality of link segments in the remaining link information are counted to determine the delayed link segment.

Therefore, the embodiment of the present application can detect the delay state information between any two nodes in the network architecture, quickly and accurately detect the link segment in the delay state, and improve the detection efficiency of the delay state information.

Embodiment 2

In the foregoing first embodiment, the method for detecting the delay state information is mainly introduced from the perspective of the network architecture. In the second embodiment corresponding to the first embodiment, the detection of the delay state information is mainly from the perspective of the destination server. The method is introduced. FIG. 4 is a flowchart of a method for detecting delay state information according to an embodiment of the present application. The execution body of this embodiment may be a destination server, and the method may include the following steps:

Step 401: Receive a probe flow carrying a first timestamp.

Step 402: Determine a second timestamp, where the second timestamp is a current time when the probe stream carrying the first timestamp is received.

Step 403: Calculate delay state information of link information corresponding to the probe flow according to the first timestamp and the second timestamp.

Step 404: Determine a delay link segment according to the delay state information of the link information corresponding to the multiple probe flows.

The implementation details in the steps in the second embodiment are described in the first embodiment, and only the description angles are different, and the reference is performed, and details are not described herein again.

Embodiment 3

This embodiment mainly introduces a method for detecting delay state information from the perspective of a source server. FIG. 5 is a flowchart of a method for detecting delay state information according to an embodiment of the present disclosure, where the method may include the following steps:

Step 501: Pre-stored a data table, where the data table includes a corresponding relationship between the probe flow information and the link information.

Step 502: Add a first timestamp to the probe flow, and send the probe flow carrying the first timestamp to the switch, and send the data table to the controller, so that the controller generates a flow table according to the data table.

The details of the implementation in each step of the third embodiment are described in the first embodiment, and the reference may be performed. The description is only different, and details are not described herein again.

Embodiment 4

This embodiment describes the method for detecting the delay state information from the perspective of the switch. The method may include:

And receiving, by the controller, a flow table, where the flow table includes matching probe flow information and action information of the switch processing the probe flow, and the switch forwards the probe flow according to the action information in the flow table that processes the probe flow.

The implementation details in the various steps in the fourth embodiment are described in the first embodiment, and only the description angles are different, and the reference is performed, and details are not described herein again.

Embodiment 5

Corresponding to the method for detecting the delay state information provided in the first embodiment of the present application, the embodiment of the present application further provides a device for detecting delay state information, which is mainly from the perspective of network architecture, and is shown in FIG. A schematic diagram of a device for detecting delay state information, the device specifically includes: a storage unit 601, a generating unit 602, a forwarding unit 603, and a determining unit 604.

The storage unit 601 is configured to store, in advance, a data table on the source node, where the data table includes a corresponding relationship between the planned probe flow information and the link information;

The generating unit 602 is configured to generate, according to the data table, a flow table on the controller, where the flow table includes matched probe flow information and action information for processing the probe flow, where the action information is an interface of the slave network device. Forward

The forwarding unit 603 is configured to: according to the action information of processing the probe flow in the flow table, instruct the intermediate node to forward the probe flow that is sent by the source node and that carries the first timestamp to the destination node, and determine Second timestamp;

The determining unit 604 is configured to determine delay state information of the link information corresponding to the probe flow according to the first timestamp and the second timestamp.

Since the embodiment is the corresponding device in the first embodiment, the implementation details in the respective steps are described in the first embodiment, and the reference is performed, and details are not described herein again.

Embodiment 6

The method for detecting the delay state information provided in the first embodiment of the present application, the embodiment of the present application further provides a network architecture. Referring to the network architecture diagram shown in FIG. 1, the network architecture may specifically include: the source server 101. The controller 102, the switch 103, and the destination server 104.

The source server 101 is configured to pre-store a data table, where the data table includes a corresponding relationship between the probe stream information and the link information, add the first timestamp to the probe stream, and send the probe stream carrying the first timestamp. And sending the data table, where the first timestamp is a current time when the probe stream is sent;

The controller 102 is configured to receive the data table sent by the source server, and generate a flow table according to the data table;

The switch 103 is configured to receive the probe flow sent by the source server, and receive the flow table that is sent by the controller, where the flow table includes matching probe flow information and action information of the switch processing the probe flow. And processing, according to the action information of the probe flow in the flow table, forwarding the probe flow carrying the first timestamp;

The destination server 104 is configured to determine the second timestamp when the probe stream carrying the first timestamp is received, and calculate the probe stream corresponding to the first timestamp and the second timestamp. Delay state information of the link information.

Optionally, the destination server specifically includes:

a receiving unit, configured to receive a probe flow carrying a first timestamp;

a determining unit, configured to determine a second timestamp, where the second timestamp is a current time when receiving the probe stream carrying the first timestamp;

a calculating unit, configured to calculate delay state information of the link information corresponding to the probe flow according to the first timestamp and the second timestamp;

The processing unit is configured to determine the delay link segment according to the delay state information of the link information corresponding to the multiple probe flows.

Since the embodiment is the corresponding device in the first embodiment, the implementation details in the respective steps are described in the first embodiment, and the reference is performed, and details are not described herein again.

The modules involved in the embodiments of the present application may be implemented by software or by hardware. The described modules may also be provided in the processor, for example, as a processor comprising a receiving module, a determining module and a control module. The names of these modules do not constitute a limitation on the module itself under certain circumstances. For example, the receiving module may also be described as "a module configured to receive a connection establishment request from a surrounding device."

In another aspect, the present application further provides a computer readable storage medium, which may be a computer readable storage medium included in the apparatus described in the foregoing embodiment, or may exist separately, not A computer readable storage medium that is assembled into a terminal. The computer readable storage medium stores one or more programs that are used by one or more processors to perform the method of operation of the microprojection device described herein.

The above description is only the preferred embodiment of the present application and the principle of the applied technology. Bright. It should be understood by those skilled in the art that the scope of the invention referred to in the present application is not limited to the specific combination of the above technical features, and should also be covered by the above technical features without departing from the inventive concept. Other technical solutions formed by any combination of their equivalent features. For example, the above features are combined with the technical features disclosed in the present application, but are not limited to the technical features having similar functions.

Claims (15)

1. A method for detecting delay state information, characterized in that the method comprises:

   Pre-storing a data table on the source node, where the data table includes a corresponding relationship between the planned probe flow information and the link information;

   And generating, according to the data table, a flow table, where the flow table includes matching probe flow information and action information for processing the probe flow, where the action information is forwarded from an interface of the network device;

   And processing the action information of the probe flow according to the process in the flow table, instructing the intermediate node to forward the probe flow that is sent by the source node and carrying the first timestamp to the destination node, and determine a second timestamp;

   Determining, according to the first timestamp, and the second timestamp, delay state information of link information corresponding to the probe flow.
2. The method according to claim 1, wherein after the determining the delay state information of the link information corresponding to the probe stream, the method further includes:

   Adding the delay state information to a correspondence relationship between the probe flow information and link information in the data table; wherein the data table includes a plurality of entries, each entry recording the probe flow information Corresponding relationship between the link information corresponding to the probe flow and the delay state information.
3. The method of claim 1 wherein

   The link information includes multiple link segments, each link segment being a link between two intermediate nodes;

   The link information is used to indicate that the intermediate node forwards the path of the probe flow.
4. The method of claim 1 further comprising:

   Receiving delay state information of the plurality of link information corresponding to the plurality of probe flows, wherein the plurality of link information are link information between the source node and the destination node;

   Determining, according to the delay state information of the multiple link information corresponding to the multiple probe flows A delay link segment between the source node and the destination node.
5. The method according to claim 4, wherein the determining the delay link segment between the source node and the destination node comprises:

   Set a delay threshold;

   Excluding the link information that the delay state information is smaller than the delay threshold;

   A plurality of link segments in the remaining link information are counted to determine the delayed link segment.
6. The method according to claim 1, wherein the probe stream information is a quad group, the quad group comprising: a network protocol IP address of the source node, an IP address of the destination node, the Source node port, the destination node port.
7. The method of claim 1 further comprising:

   Receiving a probe stream carrying a first timestamp;

   Determining a second timestamp, where the second timestamp is the current time when receiving the probe stream carrying the first timestamp;

   Calculating delay state information of the link information corresponding to the probe flow according to the first timestamp and the second timestamp;

   The delay link segment is determined according to the delay state information of the link information corresponding to the multiple probe flows.
8. The method of claim 1 further comprising:

   Pre-stored with a data table, the data table includes a correspondence relationship between the probe flow information and the link information;

   Adding a first timestamp to the probe stream, and sending the probe stream carrying the first timestamp to the switch, and sending the data table to the controller, so that the controller generates a flow table according to the data table.
9. The method according to claim 1, wherein the method further comprises: the switch receiving the flow table sent by the controller, the flow table including the matched probe flow information and the intersection The switch processes the action information of the probe flow, and the switch forwards the probe flow according to the action information in the flow table that processes the probe flow.
10. The method according to claim 9, wherein the switch receives the number of flow tables sent by the controller that is greater than the number of ports of the switch.
11. A device for detecting delay state information, characterized in that the device comprises:

    a storage unit, configured to pre-store a data table on the source node, where the data table includes a corresponding relationship between the planned probe flow information and the link information;

    a generating unit, configured to generate, according to the data table, a flow table on the controller, where the flow table includes matching probe flow information and action information for processing the probe flow, where the action information is forwarded from an interface of the network device ;

    a forwarding unit, configured to: according to the action information of the processing flow in the flow table, instruct the intermediate node to forward the probe flow that is sent by the source node and that carries the first timestamp to the destination node, and determine Two timestamps;

    a determining unit, configured to determine delay state information of the link information corresponding to the probe flow according to the first timestamp and the second timestamp.
12. A network architecture, characterized in that the network architecture comprises:

    a source server, configured to pre-store a data table, where the data table includes a corresponding relationship between the probe flow information and the link information; adding a first timestamp to the probe flow, and sending the probe flow carrying the first timestamp, and Sending the data table, where the first timestamp is a current time when the probe stream is sent;

    a controller, configured to receive the data table sent by the source server, and generate a flow table according to the data table;

    a switch, configured to receive the probe flow sent by the source server, and receive the flow table sent by the controller, where the flow table includes matching probe flow information and action information of the switch processing the probe flow, according to The action information of the probe flow in the flow table is forwarded, and the probe flow carrying the first time stamp is forwarded;

    a destination server, when receiving the probe stream carrying the first timestamp, The second timestamp is determined, and the delay state information of the link information corresponding to the probe flow is calculated according to the first timestamp and the second timestamp.
13. The network architecture according to claim 12, wherein the destination server specifically includes:

    a receiving unit, configured to receive a probe flow carrying a first timestamp;

    a determining unit, configured to determine a second timestamp, where the second timestamp is a current time when receiving the probe stream carrying the first timestamp;

    a calculating unit, configured to calculate delay state information of the link information corresponding to the probe flow according to the first timestamp and the second timestamp;

    The processing unit is configured to determine the delay link segment according to the delay state information of the link information corresponding to the multiple probe flows.
14. A device that includes:

    Processor; and

    Memory,

    The memory stores computer readable instructions executable by the processor, the processor executing the method of any one of claims 1 to 10 when the computer readable instructions are executed.
15. A non-volatile computer storage medium storing computer readable instructions executable by a processor, the processor executing claim 1 to when the computer readable instructions are executed by a processor The method of any of ten.

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