WO2016095710A1

WO2016095710A1 - Method and device for adjusting srlg

Info

Publication number: WO2016095710A1
Application number: PCT/CN2015/096352
Authority: WO
Inventors: 任明艳; 牛小兵; 刘芳; 吕文祥
Original assignee: 中兴通讯股份有限公司
Priority date: 2014-12-15
Filing date: 2015-12-03
Publication date: 2016-06-23
Also published as: CN105763344A

Abstract

Published are a method and device for dynamically adjusting a shared risk link group. The method comprises: an analysis unit receiving a failure reason as to why a network node has failed reported by a monitoring unit; the analysis unit computing failure rates corresponding to the failure reason of the network node within each pre-set cycle of a first pre-set time according to the reported failure reason; and when the analysis unit judges that the failure rates obtained by computation are all greater than or equal to a pre-set threshold value and judges that it has not saved SRLG information corresponding to the failure reason, the analysis unit generating the SRLG information corresponding to the failure reason, saving a correlation between the failure reason and the generated SRLG information, and sending the generated SRLG information to a routing computation unit.

Description

Method and device for adjusting SRLG

Technical field

This application relates to, but is not limited to, transport network technology.

Background technique

FIG. 1 is a schematic diagram of a working path and a protection path network scenario of the related art. As shown in FIG. 1 , in a transmission network, it is often necessary to complete a constraint path calculation of path diversity. When there is a risk of failure, in order to reduce the probability of simultaneous failure of the working path and the protection path, the shared risk link group (SRLG) needs to be separated from the working path and the protection path when calculating the working path and the protection path. , do not share the risk of failure, thus effectively improving the survivability of the network.

Related Art The method for obtaining the SRLG generally includes: artificially estimating the SRLG corresponding to each risk factor in advance.

Because there are many risk factors in the network, some risk factors are long-term stable, and some risk factors are sudden and exist only for a period of time (for example: sudden floods, earthquakes, explosions, power supply instability, equipment temperature Too high, cable breakage and other issues). The related art method can only perform SRLG separation for long-term stable risk factors.

Summary of the invention

The following is an overview of the topics detailed in this document. This Summary is not intended to limit the scope of the claims.

For sudden risk factors, because the risk factors exist only for a period of time, if there is no SRLL separation, the probability of the work path and the protection path sharing the failure risk is greater when a sudden failure occurs. However, an effective method for dynamically adjusting the SRLG is not given in the related art.

This paper proposes a method and device for dynamically adjusting SRLG, which can reduce the probability of the working path and the protection path sharing the risk of failure in the event of a sudden failure.

A method for adjusting a shared risk link group SRLG includes:

The analyzing unit receives the fault cause of the failure of the network node reported by the monitoring unit;

The analyzing unit calculates, according to the reported fault cause, a failure rate corresponding to the fault cause of the network node in each preset period of the first preset time;

When the analyzing unit determines that the fault rate corresponding to the fault cause is greater than or equal to the preset threshold in each preset period of the first preset time, and determines that the information of the SRLG corresponding to the fault cause is not saved by itself, The analyzing unit generates the information of the SRLG corresponding to the cause of the failure, and stores the correspondence between the cause of the failure and the generated information of the SRLG, and transmits the generated information of the SRLG to the route calculation unit.

Optionally, before the analyzing unit receives the fault cause of the fault of the network node reported by the monitoring unit, the method further includes:

The monitoring unit determines that the network node is faulty, analyzes the cause of the failure of the network node, and reports the analysis of the fault cause to the analysis unit.

Optionally, the analyzing unit determines that the fault rate corresponding to the fault cause is greater than or equal to a preset threshold in the preset period of the first preset time, and determines that the network node has When the information of the SRLG corresponding to the fault reason is saved, the method further includes:

The analyzing unit adds the newly added fault link information to the information of the SRLG corresponding to the fault cause, and notifies the route calculation unit to add the information of the SRLG after the added fault link information.

Optionally, when the analyzing unit determines that one or more links in the saved SRLG have not failed within a second preset time, the method further includes:

The analyzing unit deletes the link that has not failed in the second preset time in the information of the saved SRLG, and notifies the information of the SRLG deleted by the route calculation unit.

Optionally, when the analyzing unit determines that all links in the information of the SRLG have not failed within a second preset time, the method further includes:

The analyzing unit deletes the correspondence between the information of the SRLG and the cause of the failure, and notifies the information of the SRLG deleted by the route calculation unit.

Optionally, the monitoring unit analyzes a fault condition of the network node that is faulty, including:

The monitoring unit monitors one or more of the network nodes or the network node The factor of the associated link instability determines the cause of the failure of the network node according to the detected detection value of the factor causing the network node or the link associated with the network node to be unstable.

Optionally, the fault rate corresponding to the fault cause is a ratio between a sum of the number of times the link fails due to the fault cause and the first preset time in the first preset time.

An apparatus for adjusting a shared risk link group SRLG, comprising: an analyzing unit, where the analyzing unit includes:

The receiving module is configured to: receive a fault cause of a fault of the network node reported by the monitoring unit;

The calculation module is configured to: calculate, according to the reported fault cause, a failure rate corresponding to the fault cause of the network node in each preset period of the first preset time;

The information generating module of the SRLG is configured to: when it is determined that the fault rate corresponding to the fault cause is greater than or equal to a preset threshold in each preset period of the first preset time, and determine that the analyzing unit is not When the information of the SRLG corresponding to the cause of the failure is stored, the information of the SRLG corresponding to the cause of the failure is generated, and the correspondence between the cause of the failure and the generated information of the SRLG is stored;

The sending module is configured to: send the generated information of the SRLG to the route calculation unit.

Optionally, the device further includes: a monitoring unit, where the monitoring unit includes: a determining module, configured to: determine that the network node is faulty;

Analyze the fault cause module, set to: analyze the cause of the fault of the network node failure;

The reporting module is configured to report the cause of the failure to the analysis unit.

Optionally, the determining module is configured to:

Monitoring one or more factors that cause the network node or a link associated with the network node to be unstable, based on the detected factors that cause the network node or a link associated with the network node to be unstable The detected value determines the cause of the failure of the network node.

Optionally, the analyzing unit further includes an information update module of the SRLG,

The information update module of the SRLG is configured to: determine that the network node has a failure rate corresponding to the fault cause greater than or equal to a preset threshold in each preset period of the first preset time, and determine the The information of the SRLG corresponding to the cause of the fault has been saved, according to the fault that will be added. Link information is added to the information of the SRLG corresponding to the fault cause;

The sending module is further configured to: notify the route calculation unit to add the information of the SRLG after the added fault link information.

Optionally, the analyzing unit further includes an information deletion module of the SRLG,

The information deletion module of the SRLG is configured to: determine that one or more links in the saved SRLG information have not failed within a second preset time, and delete the saved SRLG in the second preset. a link that has not failed within the time;

The sending module is further configured to: notify the information that the route calculation unit deletes the SRLG.

Optionally, the information deletion module of the SRLG is further configured to:

Determining that all the links in the information of the SRLG have not failed within the second preset time, and deleting the correspondence between the information of the SRLG and the cause of the fault;

The sending module is further configured to: notify the information of the SRLG deleted by the route calculation unit.

A computer readable storage medium storing computer executable instructions for performing the method of any of the above.

Compared with the related art, the embodiment of the present invention includes: the analyzing unit receives the fault cause of the network node that is reported by the monitoring unit, and the analyzing unit calculates the network node in each preset period of the first preset time according to the reported fault reason. The fault rate corresponding to the fault cause; when the analyzing unit determines that the fault rate corresponding to the fault cause is greater than or equal to the preset threshold in each preset period of the first preset time, and determines that the fault is not saved by itself When the information of the SRLG corresponding to the cause is generated, the analyzing unit generates the information of the shared risk link group SRLG corresponding to the fault cause, and stores the correspondence between the fault cause and the generated SRLG information, and sends the generated SRLG information to the route calculation. unit. With the solution of the embodiment of the present invention, when a network node fails, the information of the SRLG is generated (further updated or deleted) according to the failure rate corresponding to the fault cause, and the SRLG of the (further updated, or deleted) is generated. The information is generated to the routing calculation unit, so that when a sudden failure occurs, the probability that the working path and the protection path share the failure risk is greatly reduced. Other aspects will be apparent upon reading and understanding the drawings and detailed description.

BRIEF abstract

1 is a schematic diagram of a related art working path and a protection path network scenario;

2 is a flowchart of a method for dynamically adjusting an SRLG according to an embodiment of the present invention;

3 is a schematic diagram of an interface relationship according to an embodiment of the present invention;

4 is a schematic structural diagram of an apparatus for adjusting an SRLG according to an embodiment of the present invention;

FIG. 5 is a schematic structural diagram of a transmission network in the first embodiment; FIG.

Fig. 6 is a block diagram showing the structure of a transport network in the second embodiment.

Embodiments of the invention

Embodiments of the present invention will be described below with reference to the accompanying drawings. It should be noted that the embodiments in the present application and the various manners in the embodiments may be combined with each other without conflict.

Referring to FIG. 2, an embodiment of the present invention provides a method for adjusting an SRLG, including:

Step 200: The analyzing unit receives a fault cause of a fault of the network node reported by the monitoring unit.

Before the step, the implementation may further include: the monitoring unit determines that the network node is faulty, analyzes the fault cause of the network node failure, and reports the analyzed fault cause to the analyzing unit.

The monitoring unit may pre-monitor one or more factors that may cause the network node or the link associated with the network node to be unstable (such as the temperature, humidity, voltage, etc. of the network node), and the node is unstable according to the detection. The detected value of the factor determines the cause of the failure of the network node.

For example, the monitoring unit detects the temperature, humidity, and voltage of the network node in advance. When the network node fails, the monitoring unit determines that the detected temperature value is greater than or equal to a first preset threshold, and the humidity value is less than a second preset threshold. If the voltage value is less than the third preset threshold, the monitoring unit may determine that the fault of the network node is caused by the temperature value of the network node being too high.

FIG. 3 is a schematic diagram of an interface relationship according to an embodiment of the present invention. As shown in FIG. 3, the network management system 303 can initialize the monitoring unit 301 through the second interface, thereby ensuring that the monitoring unit 301 operates normally. The monitoring unit 301 can report the analyzed fault cause to the analyzing unit 302 through the third interface.

Step 201: The analyzing unit calculates, according to the reported fault cause, a failure rate corresponding to the fault cause in each preset period of the first preset time of the network node.

In this step, the fault rate corresponding to the fault cause may be a ratio between the sum of the number of times the link fails due to the fault cause and the first preset time in the first preset time.

In this step, as shown in FIG. 3, the network management system 303 can initialize the analyzing unit 302 through the first interface, thereby ensuring that the analyzing unit 302 works normally.

In this step, for example, the first preset time may be 24 hours, and the preset period may be 6 hours, then the first preset time includes four preset periods, and each preset period refers to four preset periods. Each preset period in the preset period.

Step 202: When the analyzing unit determines that the network node is in the preset time period of the first preset time, the fault rate corresponding to the fault cause is greater than or equal to the preset threshold, and determines that the SRLG corresponding to the fault reason is not saved. In the information, the analysis unit generates the information of the SRLG corresponding to the cause of the failure, and stores the correspondence between the cause of the failure and the generated information of the SRLG, and transmits the generated information of the SRLG to the route calculation unit.

In this step, when the analyzing unit determines that the failure rate corresponding to the fault reason is greater than or equal to the preset threshold in the preset period of the first preset time, the network node determines that the fault reason is saved. When the information of the SRLG is used, the analysis unit adds the newly added fault link information to the information of the SRLG corresponding to the fault cause, and notifies the route calculation unit of the added (ie, updated) information of the SRLG.

In this step, the SRLG refers to a group of shared risk links if a group of links share a resource and the failure of such resources may affect all of the links.

The information of the SRLG can be represented by the name of the node. The analysis unit can generate the information of the SRLG according to the network topology of the transport network.

In this step, the route calculation unit calculates the working path and the protection path by using the information of the SRLG sent by the analyzing unit as a constraint condition. The route calculation unit may be a unit in the controller or a unit of other devices.

In this step, as shown in FIG. 3, the analyzing unit 302 can send the SRLG letter through the fourth interface. The information is sent to the route calculation unit.

When it is determined that one or more links in the saved SRLG information do not fail within the second preset time, the method further includes:

The link of the saved SRLG that has not failed within the second preset time is deleted, and the route calculation unit is notified to delete the information of the SRLG after (ie, updated).

When the analyzing unit does not receive the alarm of the network node within the second preset time, it is determined that the network node does not fail within the second preset time. When all network nodes on one or more links do not fail within the second preset time, it is determined that the link does not fail within the second preset time.

When the analyzing unit determines that all the links in the information of the SRLG have not failed within the second preset time, the method further includes:

The analysis unit deletes the correspondence between the information of the SRLG and the cause of the failure, and notifies the information of the SRLG deleted by the route calculation unit.

In the method of the embodiment of the present invention, the newly added fault link information is added to the information of the SRLG corresponding to the fault cause, and the link that has not failed in the second preset time in the information of the saved SRLG is deleted. Both methods belong to the process of updating the information of the SRLG.

In the solution of the embodiment of the present invention, in order to cope with the risk caused by the sudden failure, when the network node fails, the SRLG information is generated according to the failure rate corresponding to the failure reason, and the generated SRLG information is sent to the route calculation. The unit, and thus the route calculation unit does not need to use the information of the SRLG corresponding to the cause of the fault for a long time as a constraint for the path calculation, thereby improving resource utilization.

As shown in FIG. 4, an embodiment of the present invention further provides an apparatus for adjusting an SRLG, including:

The analyzing unit 302, the analyzing unit 302 includes:

The receiving module 3021 is configured to: receive a fault cause of a network node that is reported by the monitoring unit 301 to be faulty;

The calculation module 3022 is configured to: calculate, according to the reported fault cause, a failure rate corresponding to the fault cause in each preset period of the first preset time of the network node;

The information generating module 3023 of the SRLG is configured to: when determining that the network node is in the first preset When the failure rate corresponding to the cause of the failure is greater than or equal to the preset threshold in each preset period, and it is determined that the analysis unit does not save the information of the SRLG corresponding to the fault cause, the SRLG corresponding to the fault cause is generated. Information, the correspondence between the cause of the failure and the information of the generated SRLG is saved;

The sending module 3024 is configured to: send the generated information of the SRLG to the route calculation unit.

The device may further include: a monitoring unit 301, the monitoring unit 301 comprising:

The determining module 3011 is configured to: determine that the network node is faulty;

The fault cause module 3012 is configured to: analyze a fault cause of a network node failure;

The reporting module 3013 is configured to report the analysis of the cause of the failure to the analysis unit 302.

In the apparatus of the embodiment of the present invention, the determining module 3011 is configured to:

Monitoring one or more factors that cause the network node or the link associated with the network node to be unstable, and determining that the network node is faulty based on the detected detection value of the factor causing the network node or the link associated with the network node to be unstable The cause of the failure.

In the apparatus of the embodiment of the present invention, the analyzing unit 302 further includes an information updating module 3025 of the SRLG,

The information update module 3025 of the SRLG is configured to: determine that the fault rate corresponding to the fault cause is greater than or equal to a preset threshold, and determine that the fault has been saved by the network node in each preset period of the first preset time. The information of the SRLG corresponding to the cause adds the newly added fault link information to the information of the SRLG corresponding to the fault cause;

The sending module 3024 is further configured to: notify the routing calculation unit to add information about the SRLG after the faulty link information is added.

In the apparatus of the embodiment of the present invention, the analyzing unit 302 further includes an information deletion module 3026 of the SRLG,

The information deletion module 3026 of the SRLG is configured to: determine that one or more links in the saved SRLG information have not failed within a second preset time, and delete the information of the saved SRLG in the second pre- a link that has not failed within the set time;

The sending module 3024 is further configured to: notify the route computing unit to delete the letter of the SRLG interest.

In the device of the embodiment of the present invention, the information deletion module 3026 of the SRLG is further configured to: determine that all links in the information of the SRLG have not failed within the second preset time, delete the information of the SRLG and the cause of the failure. Correspondence between

The sending module 3024 is further configured to: notify the information of the SRLG deleted by the route calculation unit.

The method of the embodiment of the present invention will be described in detail below by way of examples.

In the first embodiment, the monitoring units are respectively built in each network node, and the analysis unit is built in the network management device.

When a certain area is constructed for a certain period of time, the link L(a,d) (the link between the network node A and the network node D) and the link L (a, c) as shown in FIG. 5 are caused. ) (the link between network node A and network node C) often breaks. Each time the link is interrupted, the nodes A, C, and D report the alarm (OPENFLOW message) to the SDN controller. Because the monitoring unit is added to each network node, the node also needs to report the cause of the alarm to the network management (for example, Link broken).

The analysis unit in the network management system counts the faulty network node and calculates the failure rate corresponding to the fault cause. The analysis unit calculates the failure rate due to the same failure cause for each network node whose number of failures is not 0 every 6 hours (ie, the preset period described above), that is, the failure rate=N/T.

N is the number of times the network node fails due to the same fault condition. T is 6 hours. The time unit is hour. The value of T and the unit of T can be set by the network administrator. In this scenario, the initial value of N is 0. When the failure rate is continuous for 24 hours (that is, the first preset time described above) is greater than 2 (that is, the preset threshold value described above) (the preset thresholds of the monitoring time and the failure rate can be adjusted by the network management), analysis The unit counts the nodes that have failed due to the same fault, and then counts the links of the same fault cause fault and generates SRLG information. When the failure rate of the SRLG of all the nodes in the SRLG generated for 24 hours (that is, the second preset time described above) (this value can be set by the network management) is less than 1, the information of the SRLG is deleted.

According to the above analysis principle, it is analyzed that the link failure rate of nodes A, C, and D is 24 hours longer than 2, and the link L(a, d) and link L(a, c) are counted as shared risk chains. The path group SRLG1, and sends the analysis result to the SDN controller, while analyzing the unit local storage generated Correspondence between the information of the SRLG and the cause of the failure.

During this period, when the SDN controller calculates the working path and protection path of the domain for a user, the problem that the link L(a, d) and the link L(a, c) belong to the shared risk link group will be considered. The calculated working path and protection path are separated by SRLG1 as shown in Figure 3.

The construction of the project was completed in two months. After the project is completed, the link interruption alarm does not occur frequently in this area for one week. The analysis unit in the network management device collects the alarm cause data collection and the failure rate analysis, and finds that the link L(a, d) and the link L(a, c) no longer share the risk of the link being easily interrupted. The information of the SRLG1 is sent to the SDN controller, and the analysis unit deletes the locally stored information of the SRLG, and the corresponding N on each network node is cleared. The SDN controller no longer uses SRLG1 as a constraint for the calculation.

In the second embodiment, as shown in FIG. 5, the monitoring units of the network nodes A, B, C, D, E, and F are separated from the network nodes, and the monitoring units are used to detect the stability of the power supply system power of the device. The monitoring unit has its own independent power supply device. When the power grid fails, the monitoring unit automatically switches to its own small power supply system, so that the monitoring unit will not be affected by the grid fault.

The analysis unit is an independent device, and can communicate with the network management system and the controller: the network management system configures and initializes the analysis unit, and the analysis unit sends the analysis result (generating, releasing, or updating the information of the SRLG) to the SDN controller. The analysis unit calculates the failure rate due to the same fault every hour (ie, the preset period described above), that is, the failure rate = N/T.

N is the number of times a network node fails due to the same fault. T is the time of the statistics. The time unit is hour. The units of T and T can be set by the network administrator. In this scenario, the initial value of N is 0. When the failure rate is 5 hours (this value can be set by the network management) is greater than 2, the analysis unit generates SRLG. When the failure rate is less than 1 for 10 consecutive hours (this value can be set by the network management), the SRLG is deleted and N is cleared.

In this scenario, the analysis unit frequently receives the alarm of unstable voltage from the monitoring unit of node C and node D in the near future, which causes node C and node D to fail to work normally, and the two nodes have a failure rate of more than 2 for 5 consecutive hours. Therefore, it is analyzed that the link L (A, D) and the link L (A, C) belong to the shared risk link group SRLG1, and the link L (D, E) and the link L (C, E) belong to the shared risk chain. Road group SRLG2. The analysis unit sends the newly added SRLG information to the SDN controller, and the analysis unit locally stores the newly added SRLG information.

When the SDN controller calculates the working path and protection path of the domain for a user, it will consider that the link L (A, D) and the link L (A, C) belong to SRLG1, link L (D, E) and link. L(C, E) belongs to the problem of SRLG2. The calculated working path and protection path are separated as shown in Figure 4 by SRLG1 and SRLG2.

After a period of time, the monitoring unit of the network node F also frequently sends an alarm of voltage instability to the analysis unit, and the node has a failure rate greater than 2 for 5 consecutive hours, and the analysis unit adds a link L (A, F) to the SRLG1. The link L(F, E) is added to SRLG2. The analyzing unit transmits the changed SRLG information to the SDN controller, and changes the information of the SRLG stored locally by the analyzing unit.

It can be seen from the above two embodiments that, by using the technical solution implemented by the present invention, the information of the SRLG can be dynamically generated, changed, and deleted, and the working path and the protection path calculated by the SDN controller can be avoided in the same SRLG. Reduce the possibility that the working and protective paths will not work at the same time.

One of ordinary skill in the art will appreciate that all or a portion of the steps of the above-described embodiments can be implemented using a computer program flow, which can be stored in a computer readable storage medium, such as on a corresponding hardware platform (eg, The system, device, device, device, etc. are executed, and when executed, include one or a combination of the steps of the method embodiments.

Alternatively, all or part of the steps of the above embodiments may also be implemented by using an integrated circuit. These steps may be separately fabricated into individual integrated circuit modules, or multiple modules or steps may be fabricated into a single integrated circuit module. achieve.

The devices/function modules/functional units in the above embodiments may be implemented by a general-purpose computing device, which may be centralized on a single computing device or distributed over a network of multiple computing devices.

When the device/function module/functional unit in the above embodiment is implemented in the form of a software function module and sold or used as a stand-alone product, it can be stored in a computer readable storage medium. The above mentioned computer readable storage medium may be a read only memory, a magnetic disk or an optical disk or the like.

Industrial applicability

Through the solution of the embodiment of the present invention, when a network node fails, the SRLG information is generated (or updated, deleted) according to the failure rate corresponding to the fault cause, and the generated (or updated, deleted) SRLG information is generated to the route. The calculation unit, in the event of a sudden failure, greatly reduces the probability that the working path and the protection path share the risk of failure.

Claims

A method for adjusting a shared risk link group SRLG includes:

The analyzing unit receives the fault cause of the failure of the network node reported by the monitoring unit;

The analyzing unit calculates, according to the reported fault cause, a failure rate corresponding to the fault cause of the network node in each preset period of the first preset time;

When the analyzing unit determines that the fault rate corresponding to the fault cause is greater than or equal to the preset threshold in each preset period of the first preset time, and determines that the information of the SRLG corresponding to the fault cause is not saved by itself, The analyzing unit generates the information of the SRLG corresponding to the cause of the failure, and stores the correspondence between the cause of the failure and the generated information of the SRLG, and transmits the generated information of the SRLG to the route calculation unit.
The method according to claim 1, wherein before the analyzing unit receives the failure cause of the failure of the network node reported by the monitoring unit, the method further includes:

The monitoring unit determines that the network node is faulty, analyzes the cause of the failure of the network node, and reports the analysis of the fault cause to the analysis unit.
The method according to claim 1 or 2, wherein the analyzing unit determines that the failure rate corresponding to the fault cause is greater than or equal to the fault rate of the network node in each preset period of the first preset time When the threshold value is preset and the information about the SRLG corresponding to the fault reason is saved, the method further includes:

The analyzing unit adds the newly added fault link information to the information of the SRLG corresponding to the fault cause, and notifies the route calculation unit to add the information of the SRLG after the added fault link information.
The method according to claim 1 or 2, wherein when the analyzing unit determines that one or more links of the saved SRLGs have not failed within a second predetermined time, the method further includes:

The analyzing unit deletes the link that has not failed in the second preset time in the information of the saved SRLG, and notifies the information of the SRLG deleted by the route calculation unit.
The method of claim 4, wherein said analyzing unit determines said said When all the links in the SRLG information have not failed within the second preset time, the method further includes:

The analyzing unit deletes the correspondence between the information of the SRLG and the cause of the failure, and notifies the information of the SRLG deleted by the route calculation unit.
The method according to claim 2, wherein the monitoring unit analyzes the cause of the failure of the network node to fail:

The monitoring unit monitors one or more factors that cause the network node or a link associated with the network node to be unstable, resulting in the network node or a link associated with the network node based on the detection. The detected value of the unstable factor determines the cause of the failure of the network node.
The method according to claim 1 or 2, wherein the failure rate corresponding to the fault cause is the sum of the number of times the link fails due to the fault cause in the first preset time and the first preset time The ratio between the two.
An apparatus for adjusting a shared risk link group SRLG, comprising an analyzing unit, where the analyzing unit includes:

The receiving module is configured to: receive a fault cause of a fault of the network node reported by the monitoring unit;

The calculation module is configured to: calculate, according to the reported fault cause, a failure rate corresponding to the fault cause of the network node in each preset period of the first preset time;

The information generating module of the SRLG is configured to: when it is determined that the fault rate corresponding to the fault cause is greater than or equal to a preset threshold in each preset period of the first preset time, and determine that the analyzing unit is not When the information of the SRLG corresponding to the cause of the failure is stored, the information of the SRLG corresponding to the cause of the failure is generated, and the correspondence between the cause of the failure and the generated information of the SRLG is stored;

The sending module is configured to: send the generated information of the SRLG to the route calculation unit.
The apparatus of claim 8 further comprising: a monitoring unit, said monitoring unit comprising:

The determining module is configured to: determine that the network node is faulty;

Analyze the fault cause module, set to: analyze the cause of the fault of the network node failure;

The reporting module is configured to report the cause of the failure to the analysis unit.
The apparatus of claim 9 wherein said determining module is configured to:

Monitoring one or more factors that cause the network node or a link associated with the network node to be unstable, based on the detected factors that cause the network node or a link associated with the network node to be unstable The detected value determines the cause of the failure of the network node.
The apparatus according to claim 8, wherein said analyzing unit further comprises an information update module of the SRLG,

The information update module of the SRLG is configured to: determine that the network node has a failure rate corresponding to the fault cause greater than or equal to a preset threshold in each preset period of the first preset time, and determine the The information of the SRLG corresponding to the fault cause is saved, and the newly added fault link information is added to the information of the SRLG corresponding to the fault cause;

The sending module is further configured to: notify the route calculation unit to add the information of the SRLG after the added fault link information.
The apparatus according to claim 8, wherein said analyzing unit further comprises an information deletion module of the SRLG,

The information deletion module of the SRLG is configured to: determine that one or more links in the saved SRLG information have not failed within a second preset time, and delete the saved SRLG in the second preset. a link that has not failed within the time;

The sending module is further configured to: notify the information that the route calculation unit deletes the SRLG.
The device according to claim 12, wherein the information deletion module of the SRLG is further configured to: determine that all links in the information of the SRLG have not failed within a second preset time, and delete the SRLG. Correspondence between the information and the cause of the failure;

The sending module is further configured to: notify the information of the SRLG deleted by the route calculation unit.
A computer readable storage medium storing computer executable instructions for performing the method of any of claims 1-7.