CN107819680A - A kind of method of service switchover, the network equipment - Google Patents

Abstract

The present application provides a method for switching services and a network device. The first interface of the network device includes a plurality of interior gateway protocol (IGP) neighbors, and the link between the network device and each IGP neighbor in the plurality of IGP neighbors corresponds to a link The cost value, the method includes: when the first link fails, the network device switches the transmission of service data from the first link to the second link, and the first link is the first link between the network device and the multiple IGP neighbors. The link of an IGP neighbor, the second link is the link from the network device to the first IGP neighbor through the second IGP neighbor; the first link is restored and before the label distribution protocol LDP of the first link converges, the network device The link overhead value on the first link is adjusted to the first link overhead threshold, so as to prevent the transmission of service data from being switched from the second link to the first link. The service switching method in the embodiment of the present application helps to prevent service packet loss and base station drop.

Description

A method and network equipment for switching services

technical field

The present application relates to the communication field, and more specifically, relates to a service switching method and network equipment.

Background technique

An important issue in Multi-Protocol Label Switching (MPLS) networks is the linkage between Interior Gateway Protocol (IGP) and Label Distribution Protocol (Label Distribution Protocol, LDP). Since the convergence speed of LDP depends on the IGP The convergence of routes, that is, the convergence speed of LDP is slower than that of IGP. Therefore, IGP-LDP linkage mainly solves the following problems: when the primary link fails, both IGP routes and LSPs are switched to the backup link. When recovering from a fault, the IGP neighbor recovers first, but the LDP has not yet fully converged. This is because if IGP-LDP linkage is not deployed, the service data will be switched back immediately. Since the LDP is not fully converged, the tunnel is not established successfully, resulting in service packet loss. .

In the prior art, IGP-LDP linkage is mainly used when a cell site gateway (CSG) on the base station side and neighbors of multiple service aggregation gateway devices (Aggregation Service Gateway, ASG) are established on different interfaces. If the outgoing interface of the IGP neighbor of an ASG is the same interface, that is, if there are multiple IGP neighbors under the same interface of the CSG, when the primary link fails and recovers, the IGP-LDP association will fail, resulting in service packet loss.

Contents of the invention

This application provides a method for switching services and a network device. When there are multiple IGP neighbors under the same interface of the network device, by changing the corresponding relationship between the link overhead value and the interface, it is helpful to prevent the service data from being advanced before LDP converges. Switch back to prevent service packet loss.

In a first aspect, a method for switching services is provided, the method is executed by a network device, the first interface of the network device includes a plurality of interior gateway protocol IGP neighbors, and the network device connects to each IGP in the plurality of IGP neighbors The neighbor link corresponds to a link overhead value, and the method includes: when the first link fails, the network device switches the transmission of service data from the first link to the second link, and the first link is The link from the network device to the first IGP neighbor among the plurality of IGP neighbors, the second link is the link from the network device to the first IGP neighbor through the second IGP neighbor, the second IGP neighbor is the IGP neighbors other than the first IGP neighbor among the multiple IGP neighbors; the first link recovers and before the label distribution protocol LDP of the first link converges, the network device The path overhead value is adjusted to the first link overhead threshold, so as to prevent the transmission of the service data from being switched from the second link to the first link.

In the method for switching services in the embodiment of the present application, when there are multiple IGP neighbors under the same interface of the network device, by changing the one-to-one correspondence between the link cost value and the interface, the <interface, cost> is extended to <interface, The three-dimensional structure of igp peer, cost> solves the problem of service packet loss caused by IGP-LDP linkage failure after the main link fails when there are multiple neighbors under one interface, which is more convenient for network planning and flexible deployment.

With reference to the first aspect, in some implementation manners of the first aspect, the method further includes: the network device assigning a link cost value to each IGP neighbor from the network device to the IGP neighbor.

With reference to the first aspect, in some implementation manners of the first aspect, the network device assigning a link overhead value to each of the multiple IGP neighbors includes: the network device assigning a link cost value to each of the multiple IGP neighbors Each IGP neighbor is assigned a different link cost value.

With reference to the first aspect, in some implementation manners of the first aspect, the network device adjusting the link overhead value on the first link to the first link overhead threshold includes: the network device adjusting the first link overhead value The link cost value on the link is adjusted to the maximum value.

In some possible implementations, this maximum value is 65535.

With reference to the first aspect, in some implementation manners of the first aspect, after the label distribution protocol LDP of the first link converges, the method further includes: the network device adjusting the link overhead value on the first link is the second link overhead threshold; the network device switches the transmission of the service data from the second link to the first link; wherein, the second link overhead threshold is smaller than the first link overhead threshold.

This application implements the method of switching services in the example. When there are multiple IGP neighbors under the same interface of the network device, by changing the corresponding relationship between the link overhead value and the interface, it helps to prevent the service data from being switched back in advance before LDP converges. In this way, service packet loss is prevented.

In a second aspect, a network device is provided, the first interface of the network device includes a plurality of interior gateway protocol IGP neighbors, and the link of the network device to each IGP neighbor in the plurality of IGP neighbors has a link cost value , the network device includes: a transceiver module, configured to send service data to a first IGP neighbor on a first link, where the first link is a link from the network device to a first IGP neighbor among the plurality of IGP neighbors ; A processing module, configured to switch the transmission of service data from the first link to a second link by the network device when the first link fails, and the second link is the network device through the second IGP A link from a neighbor to the first IGP neighbor, where the second IGP neighbor is an IGP neighbor other than the first IGP neighbor among the plurality of IGP neighbors; the processing module is also used to restore the first link and Before the label distribution protocol LDP of the first link converges, the network device adjusts the link overhead value on the first link to the first link overhead threshold, so as to prevent the transmission of the service data from the second link Switch to the first link.

With reference to the second aspect, in some implementation manners of the second aspect, the processing module is further configured to assign a link cost value to each IGP neighbor among the IGP neighbors from the network device.

With reference to the second aspect, in some implementation manners of the second aspect, the processing module is specifically configured to: the network device allocates a different link cost value to each of the multiple IGP neighbors.

With reference to the second aspect, in some implementation manners of the second aspect, the processing module is specifically configured to: the network device adjusts the link overhead value on the first link to a maximum value.

With reference to the second aspect, in some implementations of the second aspect, the processing module is further configured to adjust the link overhead value on the first link to a second link overhead threshold; The second link is switched to the first link; wherein, the second link overhead threshold is smaller than the first link overhead threshold.

With reference to the second aspect, in some implementation manners of the second aspect, the network device is a base station side gateway device, and the multiple IGP neighbors are multiple service aggregation gateway devices.

The network device for switching services in the implementation example of this application, when there are multiple IGP neighbors under the same interface of the network device, by changing the corresponding relationship between the link overhead value and the interface, it helps to prevent the service data from being switched back in advance before LDP converges. , so as to prevent service packet loss.

In a third aspect, a network device is provided. The network device includes a memory and a processor, the memory is used to store instructions, and the processor is used to call the instructions in the memory to perform any of the above-mentioned first aspect or the first aspect. Operations in methods in one possible implementation.

In a fourth aspect, a computer-readable storage medium is provided, and instructions are stored in the computer-readable storage medium. When the computer-readable storage medium is run on a computer, the computer can execute any one of the above-mentioned first aspect or the first aspect. method in the implementation of .

In a fifth aspect, a system chip is provided, the system chip includes an input and output interface, at least one processor, at least one memory and a bus, the at least one memory is used to store instructions, and the at least one processor is used to call the at least one memory instructions, so as to perform operations in the method in the above first aspect or any possible implementation manner of the first aspect.

Description of drawings

Fig. 1 is an application scenario of the technical solution of the embodiment of the present application.

Fig. 2 is a schematic flowchart of a method for switching services according to an embodiment of the present application.

Fig. 3 is a schematic block diagram of a network device according to an embodiment of the present application.

Fig. 4 is another schematic block diagram of a network device according to an embodiment of the present application.

Detailed ways

The technical solution in this application will be described below with reference to the accompanying drawings.

Figure 1 shows an application scenario of the technical solution of the embodiment of the present application. As shown in Figure 1, the service aggregation gateway device and the base station side gateway device pass through the two-layer network L2Network (actually another operator's virtual Private LAN service (Virtual Private LAN Service, VPLS)) is limited to a virtual switching instance (Virtual Switch Instance, VSI) and virtual local area network (Virtual Local Area Network, VLAN) provided by this operator, and the base station side gateway device and the first A service aggregation gateway device ASG1 and a second service aggregation gateway device ASG2 are logically directly connected to the same network segment, that is, a sub-interface of the gateway device on the base station side establishes an Intermediate System to Intermediate System (ISIS) with two neighbors. ) neighbors, when ASG1 and ASG2 cannot communicate through the Layer 2 network (the operator's VPLS network is used for isolation).

As shown in Figure 1, the base station gateway device has two IGP neighbors through a sub-interface (Eth-trunk 1) behind the Layer 2 network. ASG1 and ASG2 are connected through the interface (Eth-trunk 0), and the base station gateway device sends ASG1 To send business data with ASG2, the route reflector (Router Reflector, RR) provides a state-wide connection problem in the Border Gateway Protocol (Border Gateway Protocol, BGP). The main function of the route reflector RR is to reflect the BGP route of ASG to The radio side gateway device (Radio Site Gateway, RSG) may reflect the BGP route of the RSG to the ASG, and the radio network controller (Radio Network Controller, RNC) is mainly used to maintain the stability of radio propagation and the quality of service of the radio connection and control the radio Bearer establishment, maintenance and release.

FIG. 2 shows a schematic flowchart of a method 100 for switching services according to an embodiment of the present application. The method 100 can be executed by the CSG in FIG. 1 , the first interface of the network device includes a plurality of interior gateway protocol IGP neighbors, The network device corresponds to a link overhead value (Cost) to the link of each IGP neighbor in the plurality of IGP neighbors, as shown in Figure 2, the method 100 includes:

S110. When the first link fails, the network device switches the transmission of service data from the first link to the second link, where the first link is the first link between the network device and the plurality of IGP neighbors. A link of an IGP neighbor, where the second link is a link from the network device to the first IGP neighbor through a second IGP neighbor, where the second IGP neighbor is one of the multiple IGP neighbors except the first IGP neighbor IGP neighbors;

S120. Before the first link recovers and before the label distribution protocol LDP of the first link converges, the network device adjusts the link overhead value on the first link to the first link overhead threshold, so as to prevent the The transmission of service data is switched from the second link to the first link.

Specifically, there are multiple IGP neighbors under one sub-interface of the network device, the multiple IGP neighbors include a first IGP neighbor and a second IGP neighbor, and the network device connects to each IGP neighbor in the multiple IGP neighbors The link corresponds to a link cost value, the link from the network device to the first IGP neighbor is the first link, the link from the network device to the first IGP neighbor through the second IGP neighbor is the second link, the The second IGP neighbor is an IGP neighbor in the multiple IGP neighbors except the first IGP neighbor. When the first link fails, the network device switches the transmission of service data from the first link to the second link; when the first link recovers and before the LDP of the first link converges, the network The device adjusts the line overhead value on the first link to the first link overhead value, thereby preventing service data from being switched to the first link for transmission before the LDP converges.

Optionally, the first link overhead value is the maximum link overhead value.

Optionally, the maximum value is 65535.

For example, as shown in Figure 1, when CSG and ASG1 fail, the IGP-LDP between CSG and ASG1 can converge to CSG-ASG2-ASG1; when the fault recovers, the IGP neighbor recovers first, but the LDP has not yet fully converged. This is because if IGP-LDP linkage is not deployed, the service will be switched back immediately. Since LDP is not fully converged, the tunnel will not be established successfully, resulting in service packet loss; IGP-LDP linkage is deployed to make LDP converge on CSG-ASG1 Publish the maximum link overhead value. IGP releases the normal link overhead value after LDP converges to ensure that services are switched back to the CSG-ASG1 link only after LDP converges, thereby preventing service packet loss.

It should be understood that in the prior art, IGP-LDP linkage is mainly applied when the base CSG and neighbors of multiple ASGs are established on different interfaces. However, in some scenarios (Vodafone Hutchison Australia, VHA) , because the outbound interface of the neighbors of CSG and ASG1 and ASG2 is the same interface, that is, there are two IGP neighbors under the same interface of CSG. Since the neighbors of CSG and ASG2 have never been disconnected, the link cost value will not be adjusted. As a result, the linkage between IGP and LDP fails. After the ISIS neighbors of CSG and ASG1 become neighbors and the IGP converges, the service will be switched to CSG-ASG1 immediately. However, because LDP has not fully converged at this time, service packets will be lost.

The above-mentioned problem of service packet loss is mainly because the IGP link cost value under the interface corresponds to an interface, that is, the corresponding relationship of the link cost value is <interface, cost>. In the embodiment of this application, the first The interface includes a plurality of interior gateway protocol IGP neighbors, and the link from the network device to each IGP neighbor in the plurality of IGP neighbors has a link cost value (Cost), that is, the corresponding relationship of the link cost value becomes <interface, igp peer, cost>.

In the method for switching services in the embodiment of the present application, when there are multiple IGP neighbors under the same interface of the network device, by changing the one-to-one correspondence between the link cost value and the interface, the <interface, cost> is extended to <interface, The three-dimensional structure of igp peer, cost> solves the problem of service packet loss caused by IGP-LDP linkage failure after the main link fails when there are multiple neighbors under one interface, which is more convenient for network planning and flexible deployment.

Optionally, as shown in FIG. 2, the method 100 also includes:

S101. The network device assigns a link cost value to each IGP neighbor in the IGP neighbor from the network device.

Specifically, before the first link fails, the network device allocates link cost values to multiple IGP neighbors under the same interface, and the link cost values can be configured uniformly or separately. When configured uniformly, the network device has the same link cost to each IGP neighbor; when configured separately, each IGP neighbor can correspond to a different link cost.

For example, CSG configures both CSG-ASG1 and CSG-ASG2 with an initial link cost of 100, or, CSG configures an initial link cost of 50 for CSG-ASG1 and an initial link cost of CSG-ASG2 for 100.

It should be understood that the above method is described by taking the same interface of the CSG including 2 IGP neighbors as an example, and there may be 3 or more IGP neighbors on the interface, and the present application is not limited thereto.

Specifically, if CSG configures both CSG-ASG1 and CSG-ASG2 with an initial link overhead value of 100, when CSG-ASG1 fails, the transmission of service data is switched from CSG-ASG1 to CSG-ASG2-ASG1; When the fault of CSG-ASG1 recovers, CSG-ASG1 enters IGP-LDP linkage. Before LDP converges, CSG advertises the maximum link cost value on the link from CSG to ASG1, and the link cost value of CSG-ASG2 remains unchanged. , so as to prevent the transmission of service data from switching from CSG-ASG2-ASG1 to CSG-ASG1, thereby preventing service packet loss and base station drop.

Optionally, after the label distribution protocol LDP of the first link converges, the method further includes:

The network device adjusts the link overhead value on the first link to a second link overhead threshold;

switching the transmission of the service data from the second link to the first link by the network device;

Wherein, the second link overhead threshold is smaller than the first link overhead threshold.

Specifically, after the failure of the first link recovers and LDP converges, CSG adjusts the link overhead value of CSG-ASG1 back to the normal value (100), and the transmission of service data is switched from CSG-ASG2-ASG1 to CSG-ASG1 , so that the switchback does not lose packets.

This application implements the method of switching services in the example. When there are multiple IGP neighbors under the same interface of the network device, by changing the corresponding relationship between the link overhead value and the interface, it helps to prevent the service data from being switched back in advance before LDP converges. In this way, service packet loss is prevented.

The method for switching services according to the embodiment of the present application is described in detail above in conjunction with FIG. 1 and FIG. 2 . The network device according to the embodiment of the present application is described in detail below in conjunction with FIG. 3 and FIG. 4 .

Fig. 3 shows a schematic block diagram of a network device 200 according to an embodiment of the present application. As shown in Fig. 3 , the first interface of the network device includes a plurality of interior gateway protocol IGP neighbors, and the network device connects to the plurality of IGP neighbors The link of each IGP neighbor in has a link cost value, and the network device 200 includes:

A transceiver module 210, configured to send service data to a first IGP neighbor on a first link, where the first link is a link from the network device to a first IGP neighbor among the plurality of IGP neighbors;

The processing module 220 is configured to switch the transmission of service data from the first link to a second link by the network device when the first link fails, and the second link is for the network device through the second IGP A link from a neighbor to the first IGP neighbor, where the second IGP neighbor is an IGP neighbor other than the first IGP neighbor among the plurality of IGP neighbors;

The processing module 220 is further configured to, before the first link recovers and before the label distribution protocol LDP of the first link converges, the network device adjusts the link overhead value on the first link to the first link The overhead threshold is used to prevent the transmission of the service data from being switched from the second link to the first link.

Optionally, the processing module 220 is further configured to assign a link overhead value from the network device to each IGP neighbor in the IGP neighbor.

Optionally, the processing module 220 is specifically configured to:

The network device allocates a different link cost value to each of the multiple IGP neighbors.

Optionally, the processing module 220 is specifically configured to:

The network device adjusts the link overhead value on the first link to the maximum value.

Optionally, the processing module 220 is further configured to adjust the link overhead value on the first link to a second link overhead threshold;

switching the transmission of the business data from the second link to the first link;

Wherein, the second link overhead threshold is smaller than the first link overhead threshold.

Optionally, the network device is a base station side gateway device, and the multiple IGP neighbors are multiple service aggregation gateway devices.

The network device for switching services in the implementation example of this application, when there are multiple IGP neighbors under the same interface of the network device, by changing the corresponding relationship between the link overhead value and the interface, it helps to prevent the service data from being switched back in advance before LDP converges. , so as to prevent service packet loss.

Fig. 4 is a schematic structural diagram of a network device 300 according to an embodiment of the present application. As shown in FIG. 4 , the network device 300 includes a processor 301 , a memory 302 , a receiver 303 and a transmitter 304 . Communication links between these components. The memory 302 is used to store instructions, and the processor 301 is used to execute the instructions stored in the memory 302, and control the receiver 303 to receive information and the transmitter 304 to send information.

Wherein, the processor 301 is used to execute the instructions stored in the memory 302, the processor 301 can be used to perform corresponding operations and/or functions of the processing module 220 in the network device 200, and the receiver 303 and the transmitter 304 can be used for Execute corresponding operations and/or functions of the transceiver module 210 in the network device 200 , for the sake of brevity, details are not described here.

The embodiment of the present application also provides a system chip, the system chip includes input and output interfaces, at least one processor, at least one memory and a bus, the at least one memory is used to store instructions, and the at least one processor is used to call the at least one Instructions of the memory to perform the operations of the methods of the various aspects described above.

In the embodiment of the present application, it should be noted that the foregoing method embodiments in the embodiment of the present application may be applied to or implemented by a processor. A processor may be an integrated circuit chip with signal processing capabilities. In the implementation process, each step of the above-mentioned method embodiments may be completed by an integrated logic circuit of hardware in a processor or instructions in the form of software. The above-mentioned processor may be a general-purpose processor, a digital signal processor (Digital Signal Processor, DSP), an application-specific integrated circuit (Application Specific Integrated Circuit, ASIC), an off-the-shelf programmable gate array (Field Programmable Gate Array, FPGA) or other programmable Logic devices, discrete gate or transistor logic devices, discrete hardware components. Various methods, steps, and logic block diagrams disclosed in the embodiments of the present application may be implemented or executed. A general-purpose processor may be a microprocessor, or the processor may be any conventional processor, or the like. The steps of the method disclosed in connection with the embodiments of the present application may be directly implemented by a hardware decoding processor, or implemented by a combination of hardware and software modules in the decoding processor. The software module can be located in a mature storage medium in the field such as random access memory, flash memory, read-only memory, programmable read-only memory or electrically erasable programmable memory, register. The storage medium is located in the memory, and the processor reads the information in the memory, and completes the steps of the above method in combination with its hardware.

It can be understood that the memory in the embodiments of the present application may be a volatile memory or a nonvolatile memory, or may include both volatile and nonvolatile memories. Wherein, the non-volatile memory may be a read-only memory (Read-Only Memory, ROM), a programmable read-only memory (Programmable ROM, PROM), an erasable programmable read-only memory (Erasable PROM, EPROM), an electronically programmable Erase Programmable Read-Only Memory (Electrically EPROM, EEPROM) or Flash. The volatile memory can be Random Access Memory (RAM), which acts as an external cache. By way of illustration and not limitation, many forms of RAM are available such as Static RAM (SRAM), Dynamic RAM (DRAM), Synchronous DRAM (Synchronous DRAM, SDRAM), double data rate synchronous dynamic random access memory (Double Data Rate SDRAM, DDR SDRAM), enhanced synchronous dynamic random access memory (Enhanced SDRAM, ESDRAM), synchronous connection dynamic random access memory (Synchlink DRAM, SLDRAM) And direct memory bus random access memory (DirectRambus RAM, DR RAM). It should be noted that the memory of the systems and methods described herein is intended to include, but not be limited to, these and any other suitable types of memory.

It should be understood that reference throughout the specification to "one embodiment" or "an embodiment" means that a particular feature, structure, or characteristic related to the embodiment is included in at least one embodiment of the present application. Thus, appearances of "in one embodiment" or "in an embodiment" in various places throughout the specification are not necessarily referring to the same embodiment. Furthermore, the particular features, structures or characteristics may be combined in any suitable manner in one or more embodiments. It should be understood that, in various embodiments of the present application, the sequence numbers of the above-mentioned processes do not mean the order of execution, and the execution order of the processes should be determined by their functions and internal logic, and should not be used in the embodiments of the present application. The implementation process constitutes any limitation.

Additionally, the terms "system" and "network" are often used herein interchangeably. The term "and/or" in this article is just an association relationship describing associated objects, which means that there can be three relationships, for example, A and/or B can mean: A exists alone, A and B exist simultaneously, and there exists alone B these three situations. In addition, the character "/" in this article generally indicates that the contextual objects are an "or" relationship.

It should be understood that in this embodiment of the present application, "B corresponding to A" means that B is associated with A, and B can be determined according to A. However, it should also be understood that determining B according to A does not mean determining B only according to A, and B may also be determined according to A and/or other information.

In the above embodiments, all or part may be implemented by software, hardware, firmware or any combination thereof. When implemented using software, it may be implemented in whole or in part in the form of a computer program product. The computer program product may comprise one or more computer instructions. When the computer program instructions are loaded and executed on the computer, the processes or functions according to the embodiments of the present application will be generated in whole or in part. The computer may be a general purpose computer, a special purpose computer, a computer network, or other programmable devices. The computer instructions may be stored in or transmitted from one computer-readable storage medium to another computer-readable storage medium, for example, the computer instructions may be transmitted from a website, computer, server or data center Transmission to another website site, computer, server, or data center by wired (eg, coaxial cable, fiber optic, digital subscriber line (DSL)) or wireless (eg, infrared, wireless, microwave, etc.) means. The computer-readable storage medium may be any available medium that can be accessed by a computer, or a data storage device such as a server or a data center integrated with one or more available media. The available media may be magnetic media (eg, floppy disk, hard disk, magnetic disk), optical media (eg, DVD), or semiconductor media (eg, Solid State Disk (SSD)).

Those skilled in the art can appreciate that the units and algorithm steps of the examples described in conjunction with the embodiments disclosed herein can be implemented by electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are executed by hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art may use different methods to implement the described functions for each specific application, but such implementation should not be regarded as exceeding the scope of the present application.

Those skilled in the art can clearly understand that for the convenience and brevity of the description, the specific working process of the above-described system, device and unit can refer to the corresponding process in the foregoing method embodiment, which will not be repeated here.

In the several embodiments provided in this application, it should be understood that the disclosed systems, devices and methods may be implemented in other ways. For example, the device embodiments described above are only illustrative. For example, the division of the units is only a logical function division. In actual implementation, there may be other division methods. For example, multiple units or components can be combined or May be integrated into another system, or some features may be ignored, or not implemented. In another point, the mutual coupling or direct coupling or communication connection shown or discussed may be through some interfaces, and the indirect coupling or communication connection of devices or units may be in electrical, mechanical or other forms.

The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place, or may be distributed to multiple network units. Part or all of the units can be selected according to actual needs to achieve the purpose of the solution of this embodiment.

In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, each unit may exist separately physically, or two or more units may be integrated into one unit.

If the functions described above are realized in the form of software function units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application is essentially or the part that contributes to the prior art or the part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including Several instructions are used to make a computer device (which may be a personal computer, a server, or a network device, etc.) execute all or part of the steps of the methods described in the various embodiments of the present application. The aforementioned storage medium includes: various media capable of storing program codes such as U disk, mobile hard disk, read-only memory, random access memory, magnetic disk or optical disk.

The above is only a specific implementation of the application, but the scope of protection of the application is not limited thereto. Anyone familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the application. Should be covered within the protection scope of this application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims (11)

1. A kind of 1. method of service switchover, it is characterised in that methods described is performed by the network equipment, and the first of the network equipment Interface includes multiple Interior Gateway Protocol IGP neighbours, each IGP neighbours in the network equipment to the multiple IGP neighbours Link pair answer a link cost value, methods described includes：

   When first link breaks down, the network equipment is by the transmission of business datum by first link switching to the second chain Road, first link be the network equipment to the first IGP neighbours in the multiple IGP neighbours link, described second Link is link of the network equipment by the 2nd IGP neighbours to the first IGP neighbours, and the 2nd IGP neighbours are institute State the IGP neighbours in addition to the first IGP neighbours in multiple IGP neighbours；

   First link-recovery and before the tag distribution protocol LDP convergences of first link, the network equipment will Link cost value on first link is adjusted to the first link overhead threshold value, to prevent the transmission of the business datum from institute The second link switching is stated to first link.
2. 2. according to the method for claim 1, it is characterised in that methods described also includes：

   The network equipment is that each IGP neighbours in the network equipment to the IGP neighbours distribute link cost value.
3. 3. according to the method for claim 1, it is characterised in that the network equipment is every in the multiple IGP neighbours Individual IGP neighbours distribute link cost value, including：

   The network equipment is that each IGP neighbours in the multiple IGP neighbours distribute different link cost values.
4. 4. according to the method in any one of claims 1 to 3, it is characterised in that the network equipment is by first chain Link cost value on road is adjusted to the first link overhead threshold value, including：

   Link cost value on first link is adjusted to maximum by the network equipment.
5. 5. method according to any one of claim 1 to 4, it is characterised in that the label distribution association of first link After discussing LDP convergences, methods described also includes：

   Link cost value on first link is adjusted to the second link overhead threshold value by the network equipment；

   The network equipment is by the transmission of the business datum by second link switching to first link；

   Wherein, the second link overhead threshold value is less than the first link overhead threshold value.
6. 6. a kind of network equipment, it is characterised in that it is adjacent that the first interface of the network equipment includes multiple Interior Gateway Protocol IGP Occupy, the link pair of each IGP neighbours in the network equipment to the multiple IGP neighbours answers a link cost value, described The network equipment includes：

   Transceiver module, for sending business datum to the first IGP neighbours on the first link, first link is the network Link of the equipment to the first IGP neighbours in the multiple IGP neighbours；

   Processing module, for when first link breaks down, the network equipment to be by the transmission of business datum by described First link switching to the second link, second link are that the network equipment passes through the 2nd IGP neighbours to the first IGP The link of neighbours, the 2nd IGP neighbours are the IGP neighbours in addition to the first IGP neighbours in the multiple IGP neighbours；

   The processing module is additionally operable to restrain in first link-recovery and in the tag distribution protocol LDP of first link Before, the link cost value on first link is adjusted to the first link overhead threshold value by the network equipment, to prevent The transmission of business datum is stated from second link switching to first link.
7. 7. the network equipment according to claim 6, it is characterised in that the processing module is additionally operable to as the network equipment Each IGP neighbours into the IGP neighbours distribute link cost value.
8. 8. the network equipment according to claim 7, it is characterised in that the processing module is specifically used for：

   The network equipment is that each IGP neighbours in the multiple IGP neighbours distribute different link cost values.
9. 9. the network equipment according to any one of claim 6 to 8, it is characterised in that the processing module is specifically used for：

   Link cost value on first link is adjusted to maximum by the network equipment.
10. 10. the network equipment according to any one of claim 6 to 9, it is characterised in that the processing module be additionally operable to by Link cost value on first link is adjusted to the second link overhead threshold value；

    By the transmission of the business datum by second link switching to first link；

    Wherein, the second link overhead threshold value is less than the first link overhead threshold value.
11. 11. the network equipment according to any one of claim 6 to 10, it is characterised in that the network equipment is base station Side gateway device, the multiple IGP neighbours are multiple service convergence gateway devices.