CN113766032A - Service protection method and system of VBRAS (visual basic service architecture) of transfer control separation framework - Google Patents

Service protection method and system of VBRAS (visual basic service architecture) of transfer control separation framework Download PDF

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CN113766032A
CN113766032A CN202111075852.3A CN202111075852A CN113766032A CN 113766032 A CN113766032 A CN 113766032A CN 202111075852 A CN202111075852 A CN 202111075852A CN 113766032 A CN113766032 A CN 113766032A
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forwarding plane
forwarding
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韩恩钊
艾滨
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Fiberhome Telecommunication Technologies Co Ltd
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    • H—ELECTRICITY
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    • H04L67/00—Network arrangements or protocols for supporting network services or applications
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    • H04L67/1001—Protocols in which an application is distributed across nodes in the network for accessing one among a plurality of replicated servers
    • H04L67/1004—Server selection for load balancing
    • H04L67/1008—Server selection for load balancing based on parameters of servers, e.g. available memory or workload
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L63/00—Network architectures or network communication protocols for network security
    • H04L63/08—Network architectures or network communication protocols for network security for authentication of entities
    • H04L63/0892—Network architectures or network communication protocols for network security for authentication of entities by using authentication-authorization-accounting [AAA] servers or protocols
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L67/00—Network arrangements or protocols for supporting network services or applications
    • H04L67/01—Protocols
    • H04L67/10—Protocols in which an application is distributed across nodes in the network
    • H04L67/1001—Protocols in which an application is distributed across nodes in the network for accessing one among a plurality of replicated servers
    • H04L67/1004—Server selection for load balancing
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L67/00—Network arrangements or protocols for supporting network services or applications
    • H04L67/01—Protocols
    • H04L67/10—Protocols in which an application is distributed across nodes in the network
    • H04L67/1001—Protocols in which an application is distributed across nodes in the network for accessing one among a plurality of replicated servers
    • H04L67/1029—Protocols in which an application is distributed across nodes in the network for accessing one among a plurality of replicated servers using data related to the state of servers by a load balancer
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L67/00—Network arrangements or protocols for supporting network services or applications
    • H04L67/01—Protocols
    • H04L67/10—Protocols in which an application is distributed across nodes in the network
    • H04L67/1001—Protocols in which an application is distributed across nodes in the network for accessing one among a plurality of replicated servers
    • H04L67/1034—Reaction to server failures by a load balancer

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Abstract

The invention discloses a service protection method and a system of a VBRAS (visual basic service area array) of a transfer control separation framework, wherein the method calculates the load value of each forwarding surface of the VBRAS of the transfer control separation framework according to a preset balance algorithm, and determines a target forwarding surface with the current lowest load value according to the load value; the target forwarding plane reports the first request authentication signaling to a control plane, and a user forwarding table is generated on the control plane and is sent to the target forwarding plane; the forwarding plane switching state of the target forwarding plane is obtained, the service corresponding to the user forwarding plane is protected according to the forwarding plane switching state, the logic is simple, the user information loss caused by the protection switching of the fault forwarding plane can be avoided to the maximum extent, the load balance of each forwarding plane is realized, the traditional entity BRAS under a high service density scene can be replaced, various scenes can be deployed, the performance is strong, the resource redundancy is avoided, and various service protection modes including an N:1 mode can be realized.

Description

Service protection method and system of VBRAS (visual basic service architecture) of transfer control separation framework
Technical Field
The invention relates to the technical field of communication, in particular to a method and a system for protecting a VBRAS service of a transfer control separation architecture.
Background
As an emerging Broadband Access Server (BRAS) device, a Virtual Broadband Access Server (VBRAS) mainly has two architectural modes: centralized and transfer control separated mode.
After the occurrence of the virtualized VBRAS, a new protection mode is generated, namely pooling protection is performed, in the protection mode, a group of VBRAS resource pools are formed by a plurality of VBRAS instances with consistent service capability, the user session control session service is equally distributed to each pooled VBRAS instance, but when a certain VBRAS instance fails, the service borne by the VBRAS instance is shared to other VBRAS instances in the pools; the method has the advantages that the protection scene of N:1 can be realized, the defect is that the method is only suitable for a VBRAS framework in a transfer control centralized mode and has certain limitation, and meanwhile, the load sharing and the balance among a plurality of VBRASs need to be participated by an external controller, so that the realization logic is complex.
Disclosure of Invention
The invention mainly aims to provide a service protection method and a service protection system of a shift control separation architecture (VBRAS), and aims to solve the technical problems that in the prior art, pooling protection needs an external controller to participate in load sharing and balancing among a plurality of VBRASs, the realization logic is complex, and the cost is high.
In a first aspect, the present invention provides a method for protecting a VBRAS service in a handover control split architecture, where the method for protecting the VBRAS service in the handover control split architecture includes the following steps:
calculating the load value of each forwarding surface of a switching control separation framework VBRAS according to a preset balance algorithm, and determining a target forwarding surface with the current lowest load value according to the load value;
the target forwarding plane reports the first request authentication signaling to a control plane, and a user forwarding table is generated on the control plane and is sent to the target forwarding plane;
and acquiring a forwarding plane switching state of the target forwarding plane, and protecting the service corresponding to the user forwarding table according to the forwarding plane switching state.
Optionally, the calculating a load value of each forwarding plane of the VBRAS according to a preset balancing algorithm, and determining a target forwarding plane with a current lowest load value according to the load value includes:
acquiring the number of user sessions, session bandwidth and forwarding plane resources of session control loads of each forwarding plane of a VBRAS (traffic basic service architecture);
acquiring a load value of a session control load of each forwarding plane by using a preset balance algorithm according to the number of user sessions, the session bandwidth and the forwarding plane resources;
and determining the current lowest load value from the load values, and taking a forwarding plane corresponding to the current lowest load value as a target forwarding plane.
Optionally, the obtaining a load value of a session control load of each forwarding plane according to the number of user sessions, the session bandwidth, and the forwarding plane resource by using a preset balancing algorithm includes:
obtaining the load value of the session control load of each forwarding plane according to the number of the user sessions, the session bandwidth and the forwarding plane resources through the following formula:
Figure BDA0003262227950000021
Tmax＝l(∑cpu+Mem)
wherein T is the load value of the session control load, UbFor the session bandwidth, NsFor said number of user sessions, TmaxAnd the maximum load value of the current forwarding plane is shown, wherein k, m and l are preset balance coefficients, and cpu and Mem are the resources of the forwarding plane.
Optionally, the reporting, by the target forwarding plane, the first request authentication signaling to a control plane, generating a user forwarding table on the control plane, and sending the user forwarding table to the target forwarding plane, includes:
the target forwarding plane receives a first request authentication signaling and sends the first request authentication signaling to a control plane;
the control surface creates a user session table according to the first request authentication signaling, performs account authority authentication on the first request authentication signaling, and generates a user forwarding table according to the user session table after the authentication is completed;
and the control plane sends the user forwarding table to the target forwarding plane.
Optionally, the obtaining a forwarding plane switching state of the target forwarding plane, and protecting a service corresponding to the user forwarding table according to the forwarding plane switching state includes:
acquiring a service port state, a link state, a control channel state between a forwarding plane and a control plane, and a program execution state of the forwarding plane of the new online session, and determining a forwarding plane switching state of the target forwarding plane according to the service port state, the link state, the control channel state, and the program execution state;
and protecting the service corresponding to the user forwarding table according to the forwarding table switching state.
Optionally, before protecting the service corresponding to the user forwarding table according to the forwarding plane switching state, the service protection method of the VBRAS of the forwarding control split architecture further includes:
and when the target forwarding plane is switched, the service flow in the switching time is saved, and after the switching is successful, the service flow is continuously forwarded through a new target forwarding plane until the user actively goes offline.
Optionally, the protecting the service corresponding to the user forwarding table according to the forwarding plane state includes:
when the forwarding plane switching state is an activated state, receiving an authentication request signaling of a user and adding a user forwarding table;
when the switching state of the forwarding plane is a maintaining state, a new session control request is not accepted, and the signaling monitoring function is closed;
and when the switching state of the forwarding plane is a closed state, the target forwarding plane does not work, the target forwarding plane is subjected to fault analysis, and the service corresponding to the user forwarding plane is protected according to the fault analysis result.
Optionally, when the forwarding plane switching state is the closed state, the target forwarding plane does not work, performs fault analysis on the target forwarding plane, and protects a service corresponding to the user forwarding table according to a fault analysis result, including:
when the switching state of the forwarding plane is a closed state, the target forwarding plane does not work, fault analysis is carried out on the target forwarding plane, and a fault analysis result is obtained;
when the fault analysis result indicates that the target forwarding plane is an undeployed forwarding plane, re-determining the forwarding plane with the lowest load value as a new target forwarding plane;
and when the fault analysis result shows that the target forwarding plane is the fault forwarding plane, acquiring preset time, setting the fault forwarding plane to be in a switching state within the preset time, and searching a new target forwarding plane to complete online, thereby protecting the service corresponding to the user forwarding plane.
Optionally, before calculating the load value of each forwarding plane of the VBRAS according to the preset balancing algorithm and determining the target forwarding plane with the current lowest load value according to the load value, the method for protecting the VBRAS service of the VBRAS further includes:
and distributing the preset configuration parameters to each forwarding plane of the VBRAS of the pooling type forwarding separation framework so that the user configurations on each forwarding plane are consistent and the signaling request for user session control can be received.
In a second aspect, the present invention further provides a system for protecting a VBRAS service in a handover control split architecture, where the system for protecting a VBRAS service in a handover control split architecture includes:
the forwarding plane load balancing module is used for calculating load values of all forwarding planes of the VBRAS according to a preset balancing algorithm and determining a target forwarding plane with the current lowest load value according to the load values;
the forwarding plane control module is used for the target forwarding plane to report the first request authentication signaling to the control plane, and a user forwarding table is generated on the control plane and is sent to the target forwarding plane;
and the protection module is used for acquiring the forwarding plane switching state of the target forwarding plane and protecting the service corresponding to the user forwarding table according to the forwarding plane switching state.
The invention provides a service protection method of a switching control separation framework VBRAS, which calculates the load value of each forwarding surface of the switching control separation framework VBRAS according to a preset balance algorithm, and determines the target forwarding surface with the current lowest load value according to the load value; the target forwarding plane reports the first request authentication signaling to a control plane, and a user forwarding table is generated on the control plane and is sent to the target forwarding plane; the forwarding plane switching state of the target forwarding plane is obtained, the service corresponding to the user forwarding plane is protected according to the forwarding plane switching state, the logic is simple, the user information loss caused by the protection switching of the fault forwarding plane can be avoided to the maximum extent, the load balance of each forwarding plane is realized, the traditional entity BRAS under a high service density scene can be replaced, various scenes can be deployed, the performance is strong, the resource redundancy is avoided, and various service protection modes including an N:1 mode can be realized.
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Fig. 1 is a schematic flow chart of a first embodiment of a traffic protection method of a transition control separation architecture VBRAS according to the present invention;
FIG. 2 is a flowchart illustrating a second embodiment of a traffic protection method for a VBRAS of the present invention;
fig. 3 is a deployment diagram of a VBRAS of a transition control split architecture in the service protection method of the transition control split architecture VBRAS of the present invention;
FIG. 4 is a flow chart of a third embodiment of a traffic protection method of a transition control separation architecture VBRAS according to the present invention;
fig. 5 is a diagram illustrating key modules of CP and UP in the traffic protection method of the transition control separation architecture VBRAS according to the present invention;
FIG. 6 is a schematic flow chart of a fourth embodiment of a traffic protection method for a relay separation architecture VBRAS according to the present invention;
FIG. 7 is a flow chart illustrating a fifth embodiment of a traffic protection method for a VBRAS of a transfer control separation architecture according to the present invention;
fig. 8 is a flowchart illustrating a sixth embodiment of a service protection method for VBRAS of a transition control separation architecture according to the present invention;
FIG. 9 is a functional block diagram of a first embodiment of a traffic protection system of a relay separation architecture VBRAS according to the present invention;
fig. 10 is a functional block diagram of a traffic protection system of a second embodiment of the diversion-control separation architecture VBRAS according to the present invention.
The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.
Detailed Description
It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
The solution of the embodiment of the invention is mainly as follows: calculating the load value of each forwarding surface of a switching control separation framework VBRAS according to a preset balancing algorithm, and determining a target forwarding surface with the current lowest load value according to the load value; the target forwarding plane reports the first request authentication signaling to a control plane, and a user forwarding table is generated on the control plane and is sent to the target forwarding plane; the method comprises the steps of obtaining a forwarding plane switching state of a target forwarding plane, protecting services corresponding to a user forwarding table according to the forwarding plane switching state, achieving simple logic, avoiding user information loss caused by fault forwarding plane protection switching to the maximum extent, achieving load balancing of each forwarding plane, replacing a traditional entity BRAS in a high-service-density scene, being capable of deploying various scenes, being powerful in performance, avoiding resource redundancy, achieving multiple service protection modes including an N:1 mode, and solving the technical problems that in the prior art, external controllers are needed to participate in achieving load sharing and balancing among a plurality of VBRASs in pooling protection, achieving complex logic and high cost.
Referring to fig. 1, fig. 1 is a flowchart illustrating a first embodiment of a traffic protection method of a transition control separation architecture VBRAS according to the present invention.
In a first embodiment, the traffic protection method of the steering separation architecture VBRAS includes the following steps:
and step S10, calculating the load value of each forwarding surface of the VBRAS according to a preset balance algorithm, and determining the target forwarding surface with the current lowest load value according to the load value.
It should be noted that the preset balancing algorithm is a preset balancing algorithm, and is configured to calculate each forwarding Plane, that is, a User session Control session load of a User Plane (UP), a load value of each forwarding Plane of the VBRAS may be obtained through the preset balancing algorithm, a lowest load value may be determined from the obtained load values, and a target forwarding Plane, that is, a target User Plane, corresponding to the lowest load value may be determined, and the preset balancing algorithm may generally be deployed in a Control Plane (CP), and may also be set in other devices or modules, which is not limited in this embodiment.
In specific implementation, the load value of each session control load corresponding to each forwarding plane can be calculated and obtained by calling the relevant parameters of each forwarding plane of the VBRAS (traffic control and separation architecture) and utilizing a preset balancing algorithm; and screening the load values, determining a corresponding load lowest value from the load values as a current lowest load value, and taking a forwarding plane corresponding to the current lowest load value as a target forwarding plane.
Step S20, the target forwarding plane reports the first request authentication signaling to the control plane, and generates a user forwarding table on the control plane and sends the user forwarding table to the target forwarding plane.
In this embodiment, the target forwarding plane receives the first request authentication signaling of the user and reports the first request authentication signaling to the control plane, so that a user forwarding table is generated on the control plane and sent to the target forwarding plane, thereby preparing for subsequent user internet access service.
Step S30, obtaining a forwarding plane switching state of the target forwarding plane, and protecting a service corresponding to the user forwarding table according to the forwarding plane switching state.
It should be understood that the forwarding plane switching state is a current working operation state of the target forwarding plane, different forwarding plane switching states correspond to different service protection policies, and different service protection policies are determined according to the forwarding plane switching state to perform targeted protection on services corresponding to the user forwarding table.
According to the scheme, the load value of each forwarding surface of the VBRAS is calculated according to the preset balance algorithm, and the target forwarding surface with the current lowest load value is determined according to the load value; the target forwarding plane reports the first request authentication signaling to a control plane, and a user forwarding table is generated on the control plane and is sent to the target forwarding plane; the forwarding plane switching state of the target forwarding plane is obtained, the service corresponding to the user forwarding plane is protected according to the forwarding plane switching state, the logic is simple, the user information loss caused by the protection switching of the fault forwarding plane can be avoided to the maximum extent, the load balance of each forwarding plane is realized, the traditional entity BRAS under a high service density scene can be replaced, various scenes can be deployed, the performance is strong, the resource redundancy is avoided, and various service protection modes including an N:1 mode can be realized.
Further, fig. 2 is a flowchart illustrating a second embodiment of the traffic protection method of the re-control split architecture VBRAS according to the present invention, and as shown in fig. 2, the second embodiment of the traffic protection method of the re-control split architecture VBRAS according to the present invention is proposed based on the first embodiment, and in this embodiment, the step S10 includes the following steps:
step S11, obtaining the number of user sessions, session bandwidth, and forwarding plane resources of the session control load of each forwarding plane of the VBRAS.
It should be noted that the number and bandwidth of session control session services of the user, that is, the number and bandwidth of the user sessions, and the session bandwidth and forwarding plane resources are combined to calculate and obtain the load value of each forwarding plane, where the forwarding plane resources are resources allocated by the forwarding plane, and generally include a CPU and a memory.
And step S12, obtaining the load value of the session control load of each forwarding plane by using a preset balance algorithm according to the user session number, the session bandwidth and the forwarding plane resources.
It can be understood that, by substituting the number of user sessions, the session bandwidth, and the forwarding plane resource into the preset balancing algorithm, the load proportion of a single forwarding plane, that is, the load value of the session control load of each forwarding plane, can be calculated.
Further, the step S12 specifically includes the following steps:
obtaining the load value of the session control load of each forwarding plane according to the number of the user sessions, the session bandwidth and the forwarding plane resources through the following formula:
Figure BDA0003262227950000071
Tmax＝l(∑cpu+Mem)
wherein T is the load value of the session control load, UbFor the session bandwidth, NsFor said number of user sessions, TmaxAnd k and m are preset balance coefficients for the maximum load value of the current forwarding plane, and cpu and Mem are the forwarding plane resources.
In a specific implementation, as shown in fig. 3, fig. 3 is a deployment diagram of a transition control separation architecture VBRAS in the method for protecting a service of a transition control separation architecture VBRAS of the present invention, referring to fig. 3, a control plane VBRAS-CP of a virtual broadband access server deployed in practice may control 3 virtual broadband access server user planes VBRAS-UP1, VBRAS-UP2, and VBRAS-UP3, that is, a current load level of 3 user planes UP is calculated by the VBRAS-CP, so that a load value T of 3 user planes UP is generally calculated according to the load level of the user plane as a basis for determining transition control separation quantization, thereby selecting active user planes UP, and a switching module SW may switch a state of the user plane.
It should be noted that the preset balance coefficient is a preset coefficient for performing service balance calculation, and there are various strategies and specific ways for ensuring service balance between forwarding planes, for example, service balance may be performed with reference to multiple angles such as signaling density, user traffic, and forwarding plane resources, and in this embodiment, the number of user sessions, the session bandwidth, and the forwarding plane resources are taken into comprehensive consideration to calculate a load value of a session control load of each forwarding plane, so as to calculate a real current load level according to a control plane CP of a actually deployed steering separation architecture VBRAS.
Step S13, determining a current lowest load value from the load values, and taking a forwarding plane corresponding to the current lowest load value as a target forwarding plane.
It should be understood that screening the load values enables determining a corresponding load lowest value from the load values as a current lowest load value, and using a forwarding plane corresponding to the current lowest load value as a target forwarding plane.
In this embodiment, by the above scheme, the number of user sessions, the session bandwidth, and the forwarding plane resources of the session control load of each forwarding plane of the VBRAS is obtained; acquiring a load value of a session control load of each forwarding plane by using a preset balance algorithm according to the number of user sessions, the session bandwidth and the forwarding plane resources; determining a current lowest load value from the load values, and taking a forwarding surface corresponding to the current lowest load value as a target forwarding surface; the load value of the session control load of each forwarding plane can be accurately obtained, and data support is provided for subsequently searching the lowest load forwarding plane.
Further, fig. 4 is a flowchart illustrating a third embodiment of the traffic protection method of the re-control split architecture VBRAS according to the present invention, and as shown in fig. 4, the third embodiment of the traffic protection method of the re-control split architecture VBRAS according to the present invention is proposed based on the first embodiment, and in this embodiment, the step S20 specifically includes the following steps:
step S21, the target forwarding plane receives the first authentication request signaling, and sends the first authentication request signaling to the control plane.
It should be noted that any forwarding plane may receive a signaling request for controlling a user session, where the user access authentication Protocol is a preset signaling message generation Protocol, that is, the signaling message conforms to the user access authentication Protocol, and the user access authentication Protocol may be a Point-to-Point Protocol Over Ethernet (PPPOE), an Ethernet IP Protocol (IP Over Ethernet, IPOE), or other protocols, which is not limited in this embodiment.
In this embodiment, it is further limited that the forwarding plane in the active (s _ active) state can receive the first broadcast request signaling (the PADI packet in the PPPOE mode and the DHCP discover packet in the IPOE mode) of the user, and the other forwarding planes in the maintenance state (s _ hold) discard the first access request signaling packet. Specifically, the load values of all forwarding planes are calculated in the user online process, and the forwarding plane with the lowest load (i.e. the target forwarding plane) is selected as the active forwarding plane. Based on this, only the target forwarding plane receives the first request authentication signaling, and then sends the first request authentication signaling to the control plane.
Step S22, the control plane creates a user session table according to the first request authentication signaling, performs account authority authentication on the first request authentication signaling, and generates a user forwarding table according to the user session table after authentication is completed.
It can be understood that, after the target forwarding plane sends the first request authentication signaling to the control plane, the control plane creates a user session table according to the first request authentication signaling, and the control plane further performs AAA authentication on the first request authentication signaling, that is, performs identity authentication, Authority authentication, and Account authentication Account, and after the authentication is passed, a user forwarding table can be generated according to the user session table created before.
In a specific implementation, as shown in fig. 5, fig. 5 is a diagram illustrating key modules of CP and UP in the service protection method of the VBRAS of the transition Control separation architecture of the present invention, and referring to fig. 5, a VBRAS-CP of a virtual broadband access Server Control plane is composed of a User Management Module (UM), a User plane Load balancing Module (ULBM), a User plane Control Module Server (UP Control Module Server, UPCM Server), and a User plane fault Detection Module (UP error Detection Module, UPED), where the ULBM is deployed in the CP Control plane, and the Module calculates User node Load of each UP according to a specific algorithm to obtain a Load value, and then finds the current lowest Load UP by traversing Load proportions of all UPs.
The UPCM Server is divided into client and Server, the UPCM Server is disposed on the CP side, the client is on the UP side, after the client and Server establish communication, the UPCM Server can control the working mode of UP, the UP working mode is divided into three states: activated, maintained and off states; the activation state is a normal working state, and can receive PPPOE and IPOE authentication request signaling of a user and add a user forwarding table; in the maintenance state, the UP does not accept the new user session control session request, and the signaling monitoring function is closed, but the user who has been on line in the UP is not affected, and the list item can be updated normally.
The UPED belongs to a sub-module of a UPCM client, detects the running health state of the UP, detects and reports the running state of the UP according to the set detection condition, and can inform the server of the state change found by the UPED, usually the fault UP or the undeployed UP does not work, the request of newly-added user session control session cannot be provided, and the existing on-line user session control session cannot be maintained.
The virtual broadband access server client VBRAS-UP is composed of a user plane control module client UPCM client and a Session forwarding Table Session forward Table.
Step S23, the control plane sends the user forwarding table to the target forwarding plane.
It should be understood that a user forwarding plane is generated after authentication is completed, and the control plane forwarding table is issued to the target forwarding plane, so that communication of user internet access services can be realized.
According to the scheme, the communication of the user internet access service of each forwarding plane can be rapidly realized, and the accuracy of the signaling message is ensured.
Further, fig. 6 is a flowchart illustrating a fourth embodiment of the traffic protection method of the re-control split architecture VBRAS according to the present invention, and as shown in fig. 6, the fourth embodiment of the traffic protection method of the re-control split architecture VBRAS according to the present invention is proposed based on the first embodiment, in this embodiment, the step S30 specifically includes the following steps:
step S31, obtaining a service port state, a link state, a control channel state between a forwarding plane and a control plane, and a program execution state of the forwarding plane of the new online session, and determining a forwarding plane switching state of the target forwarding plane according to the service port state, the link state, the control channel state, and the program execution state.
It should be noted that, in order to detect a failure of the forwarding plane, the operation state of the forwarding plane can be detected in real time, and the detected content may include a service port state, a link state, a control channel state between the forwarding plane and the control plane, a program execution state of the forwarding plane, and the like, and through these states, the forwarding plane switching state of the target forwarding plane can be determined, so as to determine whether the target forwarding plane fails.
Step S32, protecting the service corresponding to the user forwarding table according to the forwarding plane switching state.
It can be understood that different protection strategies can be formulated by analyzing the forwarding plane switching state, and different service protection strategies can be adopted to protect the service corresponding to the user forwarding table according to the difference of the forwarding plane switching state.
Further, before the step S32, the traffic protection method of the diversion separation architecture VBRAS further includes the following steps:
and when the target forwarding plane is switched, the service flow in the switching time is saved, and after the switching is successful, the service flow is continuously forwarded through a new target forwarding plane until the user actively goes offline.
It can be understood that when the target forwarding plane is switched, the service traffic in the switching process can be saved, and then after the switching is completed, the service traffic is forwarded through the new forwarding plane, and the new service traffic generated in the user using process is forwarded until the user actively goes offline.
In this embodiment, with the above scheme, by obtaining a service port state, a link state, a control channel state between a forwarding plane and a control plane, and a program execution state of the forwarding plane of the new online session, a forwarding plane switching state of the target forwarding plane is determined according to the service port state, the link state, the control channel state, and the program execution state; and protecting the service corresponding to the user forwarding table according to the switching state of the forwarding table, specifically protecting the service corresponding to the user forwarding table, and detecting the running state of the forwarding table in real time, so that the fault detection rate of the forwarding table is improved, and the normal operation of the service is ensured.
Further, fig. 7 is a flowchart illustrating a fifth embodiment of the traffic protection method of the re-control split architecture VBRAS according to the present invention, and as shown in fig. 7, the fifth embodiment of the traffic protection method of the re-control split architecture VBRAS according to the present invention is proposed based on the fourth embodiment, in this embodiment, the step S32 specifically includes the following steps:
step S321, when the forwarding plane switching state is the activated state, receiving the authentication request signaling of the user, and adding a user forwarding table.
It should be noted that, the activation state is a normal working state, and may receive an authentication request instruction of a user, which may generally be an authentication request signaling of a protocol such as PPPOE or IPOE, and add a new user forwarding table.
Step S322, when the switching state of the forwarding plane is the maintaining state, not accepting the new session control request, and closing the signaling monitoring function.
It should be understood that the forwarding plane in the maintained state does not accept a new session control session request and may relate to a signaling monitoring function, but a user who is already on line on the forwarding plane is not affected, and the entry may be updated normally.
In the specific implementation, the load values of all forwarding planes are calculated in the user online process, and then the forwarding plane with the lowest load is selected as an active forwarding plane, namely a target forwarding plane, and a forwarding table of a new online session control session is generated through the active forwarding plane, wherein initially, the load value of each forwarding plane is 0; one forwarding surface can be set as an active forwarding surface, and the other forwarding surfaces can be set as a maintenance state; the process of setting the state can be generally issued to a forwarding plane end through a forwarding plane control module, the forwarding plane in the activated state can receive a first broadcast request signaling of a user, the forwarding plane in the PPPOE mode is a PADI message, the forwarding plane in the IPOE mode is a DHCP discover message, and other forwarding planes in the maintained state can discard the first access request signaling message.
Step S323, when the forwarding plane switching state is the closed state, the target forwarding plane does not work, performs fault analysis on the target forwarding plane, and protects the service corresponding to the user forwarding table according to the fault analysis result.
It can be understood that the forwarding plane in the closed state does not work, and cannot provide a new session control request, nor can the existing online session be maintained, and generally, such forwarding plane is a failure forwarding plane or an undeployed forwarding plane, and at this time, the target forwarding plane may perform failure analysis, and protect the service corresponding to the user forwarding table according to the failure analysis result.
Further, the step S323 specifically includes the following steps:
when the switching state of the forwarding plane is a closed state, the target forwarding plane does not work, fault analysis is carried out on the target forwarding plane, and a fault analysis result is obtained;
when the fault analysis result indicates that the target forwarding plane is an undeployed forwarding plane, re-determining the forwarding plane with the lowest load value as a new target forwarding plane;
and when the fault analysis result shows that the target forwarding plane is the fault forwarding plane, acquiring preset time, setting the fault forwarding plane to be in a switching state within the preset time, and searching a new target forwarding plane to complete online, thereby protecting the service corresponding to the user forwarding plane.
It should be noted that the forwarding plane in the closed state does not work, and at this time, the target forwarding plane may be subjected to fault analysis, so as to obtain a corresponding fault analysis result; and when the target forwarding plane is an undeployed forwarding plane, returning to the previous step, re-determining a forwarding plane with the lowest load value as the target forwarding plane, and if corresponding sorting is performed before, sequentially selecting the next forwarding plane.
It can be understood that, when the target forwarding plane is a failure forwarding plane, the failure forwarding plane may be set to a switch state within a preset time, and the preset time may be adjusted according to an actual situation, for example, 5 minutes, for a user session belonging to the failure forwarding plane, the user session is set to the switch state within 5 minutes, so that traffic and statistical information of the user are retained, and as long as the user completes online on a new active forwarding plane within 5 minutes, the user does not need to delete the new active forwarding plane, and only needs to switch the user session from the switch state to a normal state; for the users with the failure forwarding plane for more than 5 minutes, the users can still be used as new session users to be online, so that the data of the failure forwarding plane can be retained to the maximum extent, the user information loss caused by the protection switching of the failure forwarding plane is avoided, and the upper-layer account authority authentication server cannot sense the data.
According to the scheme, when the forwarding plane switching state is the activated state, the authentication request signaling of the user is received, and a user forwarding table is added; when the switching state of the forwarding plane is a maintaining state, a new session control request is not accepted, and the signaling monitoring function is closed; when the forwarding plane switching state is a closed state, the target forwarding plane does not work, fault analysis is carried out on the target forwarding plane, services corresponding to the user forwarding table are protected according to a fault analysis result, the services corresponding to the user forwarding table can be protected according to the forwarding plane switching state, the implementation logic is simple, user information loss caused by fault forwarding plane protection switching can be avoided to the maximum extent, load balance of each forwarding plane is achieved, the traditional entity BRAS under a high service density scene can be replaced, various scenes can be deployed, the performance is strong, resource redundancy is avoided, and various service protection modes including an N:1 mode can be implemented.
Further, fig. 8 is a flowchart illustrating a sixth embodiment of the traffic protection method of the re-control split architecture VBRAS according to the present invention, and as shown in fig. 8, the sixth embodiment of the traffic protection method of the re-control split architecture VBRAS according to the present invention is proposed based on the first embodiment, in this embodiment, before the step S10, the traffic protection method of the re-control split architecture VBRAS further includes the following steps:
step S01, distributing the preset configuration parameters to each forwarding plane of the pooled switching control split architecture VBRAS, so that the user configurations on each forwarding plane are consistent and can receive the signaling request of user session control.
It should be noted that, under the control split architecture, the control plane manages all forwarding planes, and is generally deployed according to a pooling configuration manner, and can distribute the configuration to each pooled forwarding plane, that is, distribute preset configuration parameters to each forwarding plane of the pooled control split architecture VBRAS, so that the user configurations on each forwarding plane are consistent, and any forwarding plane can receive a signaling request for user session control.
In a specific implementation, all VBRAS are deployed in one two-layer broadcast domain, and a first broadcast signaling message (a PADI message in a PPPOE manner and a DHCP discover message in an IPOE manner) of a user can reach all forwarding plane devices.
In this embodiment, by the above scheme, the preset configuration parameters are distributed to each forwarding plane of the pooled forwarding separation architecture VBRAS, so that the user configurations on each forwarding plane are consistent, and all signaling requests for user session control can be received, the configurations of each forwarding plane can be unified, and all signaling requests for user session control can be received, thereby improving the efficiency of service protection.
Correspondingly, the invention further provides a business protection system of the transfer control separation architecture VBRAS.
Referring to fig. 9, fig. 9 is a functional block diagram of a first embodiment of a traffic protection system of a transition control separation architecture VBRAS according to the present invention.
In a first embodiment of a traffic protection system of a relay separation architecture VBRAS of the present invention, the traffic protection system of the relay separation architecture VBRAS comprises:
the forwarding plane load balancing module 10 is configured to calculate a load value of each forwarding plane of the VBRAS of the forwarding separation architecture according to a preset balancing algorithm, and determine a target forwarding plane with a current lowest load value according to the load value;
a forwarding plane control module 20, configured to report the first request authentication signaling to a control plane by the target forwarding plane, generate a user forwarding table on the control plane, and send the user forwarding table to the target forwarding plane;
the protection module 30 is configured to obtain a forwarding plane switching state of the target forwarding plane, and protect a service corresponding to the user forwarding table according to the forwarding plane switching state.
Further, in an embodiment, the forwarding plane load balancing module 10 is configured to:
acquiring the number of user sessions, session bandwidth and forwarding plane resources of session control loads of each forwarding plane of a VBRAS (traffic basic service architecture);
acquiring a load value of a session control load of each forwarding plane by using a preset balance algorithm according to the number of user sessions, the session bandwidth and the forwarding plane resources;
and determining the current lowest load value from the load values, and taking a forwarding plane corresponding to the current lowest load value as a target forwarding plane.
Further, in an embodiment, the forwarding plane load balancing module 10 is configured to:
obtaining the load value of the session control load of each forwarding plane according to the number of the user sessions, the session bandwidth and the forwarding plane resources through the following formula:
Figure BDA0003262227950000151
Tmax＝l(∑cpu+Mem)
wherein T is the load value of the session control load, UbFor the session bandwidth, NsFor said number of user sessions, TmaxAnd the maximum load value of the current forwarding plane is shown, wherein k, m and l are preset balance coefficients, and cpu and Mem are the resources of the forwarding plane.
Further, in an embodiment, the forwarding plane control module 20 is configured to:
the target forwarding plane receives a first request authentication signaling and sends the first request authentication signaling to a control plane;
the control surface creates a user session table according to the first request authentication signaling, performs account authority authentication on the first request authentication signaling, and generates a user forwarding table according to the user session table after the authentication is completed;
and the control plane sends the user forwarding table to the target forwarding plane.
Further, in an embodiment, the protection module 30 is configured to:
acquiring a service port state, a link state, a control channel state between a forwarding plane and a control plane, and a program execution state of the forwarding plane of the new online session, and determining a forwarding plane switching state of the target forwarding plane according to the service port state, the link state, the control channel state, and the program execution state;
and protecting the service corresponding to the user forwarding table according to the forwarding table switching state.
Further, in an embodiment, the protection module 30 is configured to:
and when the target forwarding plane is switched, the service flow in the switching time is saved, and after the switching is successful, the service flow is continuously forwarded through a new target forwarding plane until the user actively goes offline.
Further, in an embodiment, the protection module 30 is configured to:
when the forwarding plane switching state is an activated state, receiving an authentication request signaling of a user and adding a user forwarding table;
when the switching state of the forwarding plane is a maintaining state, a new session control request is not accepted, and the signaling monitoring function is closed;
and when the switching state of the forwarding plane is a closed state, the target forwarding plane does not work, the target forwarding plane is subjected to fault analysis, and the service corresponding to the user forwarding plane is protected according to the fault analysis result.
Further, in an embodiment, the protection module 30 is configured to:
when the switching state of the forwarding plane is a closed state, the target forwarding plane does not work, fault analysis is carried out on the target forwarding plane, and a fault analysis result is obtained;
when the fault analysis result indicates that the target forwarding plane is an undeployed forwarding plane, re-determining the forwarding plane with the lowest load value as a new target forwarding plane;
and when the fault analysis result shows that the target forwarding plane is the fault forwarding plane, acquiring preset time, setting the fault forwarding plane to be in a switching state within the preset time, and searching a new target forwarding plane to complete online, thereby protecting the service corresponding to the user forwarding plane.
Further, fig. 10 is a functional block diagram of a second embodiment of the traffic protection system of the transition control separation architecture VBRAS according to the present invention; as shown in fig. 10, a second embodiment of the traffic protection system of the re-control split-architecture VBRAS according to the present invention is proposed based on the first embodiment, and in this embodiment, the traffic protection system of the re-control split-architecture VBRAS further includes:
a forwarding plane configuration distribution module 00, configured to distribute preset configuration parameters to each forwarding plane of the pooled VBRAS in the split-control framework, so that the user configurations on each forwarding plane are consistent and can receive a signaling request for user session control.
It should be noted that, all forwarding planes managed by the control plane are deployed in a pooling configuration mode, and the forwarding plane configuration distribution module is responsible for distributing configurations to each pooled forwarding plane, so as to ensure that user configurations on each forwarding plane are consistent, and any forwarding plane can receive a signaling request for user session control; when the initial state of each forwarding surface is set, one forwarding surface can be set as an active forwarding surface, so that the states of other forwarding surfaces are in a maintaining state; the configuration of each forwarding plane can be unified, the signaling request for user session control can be received, and the service protection efficiency is improved.
The specific embodiment of the traffic protection system of the transition control split architecture VBRAS of the present invention is substantially the same as the above-mentioned embodiments of the traffic protection method of the transition control split architecture VBRAS of the present invention, and details thereof are not repeated herein.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or system that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or system. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or system that comprises the element.
The above-mentioned serial numbers of the embodiments of the present invention are merely for description and do not represent the merits of the embodiments.
The above description is only a preferred embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, which are made by using the contents of the present specification and the accompanying drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.

Claims (10)

1. A service protection method of a relay separation architecture VBRAS is characterized in that the service protection method of the relay separation architecture VBRAS comprises the following steps:
calculating the load value of each forwarding surface of a switching control separation framework VBRAS according to a preset balance algorithm, and determining a target forwarding surface with the current lowest load value according to the load value;
the target forwarding plane reports the first request authentication signaling to a control plane, and a user forwarding table is generated on the control plane and is sent to the target forwarding plane;
and acquiring a forwarding plane switching state of the target forwarding plane, and protecting the service corresponding to the user forwarding table according to the forwarding plane switching state.
2. The traffic protection method of VBRAS of a switching control split architecture according to claim 1, wherein the calculating a load value of each forwarding plane of the VBRAS according to a preset balancing algorithm and determining a target forwarding plane with a current lowest load value according to the load value comprises:
acquiring the number of user sessions, session bandwidth and forwarding plane resources of session control loads of each forwarding plane of a VBRAS (traffic basic service architecture);
acquiring a load value of a session control load of each forwarding plane by using a preset balance algorithm according to the number of user sessions, the session bandwidth and the forwarding plane resources;
and determining the current lowest load value from the load values, and taking a forwarding plane corresponding to the current lowest load value as a target forwarding plane.
3. The traffic protection method of VBRAS of a transfer control separation architecture of claim 2, wherein the obtaining the load value of the session control load of each forwarding plane by using a preset balancing algorithm according to the number of user sessions, the session bandwidth and the forwarding plane resources comprises:
obtaining the load value of the session control load of each forwarding plane according to the number of the user sessions, the session bandwidth and the forwarding plane resources through the following formula:
Figure FDA0003262227940000011
T max＝l(∑cpu+Mem)
wherein T is the load value of the session control load, UbFor the session bandwidth, NsFor said number of user sessions, TmaxAnd the maximum load value of the current forwarding plane is shown, wherein k, m and l are preset balance coefficients, and cpu and Mem are the resources of the forwarding plane.
4. The traffic protection method of VBRAS of a transfer control separation architecture of claim 1, wherein the target forwarding plane reports a first authentication request signaling to a control plane, generates a user forwarding table on the control plane and sends the user forwarding table to the target forwarding plane, and the method comprises:
the target forwarding plane receives a first request authentication signaling and sends the first request authentication signaling to a control plane;
the control surface creates a user session table according to the first request authentication signaling, performs account authority authentication on the first request authentication signaling, and generates a user forwarding table according to the user session table after the authentication is completed;
and the control plane sends the user forwarding table to the target forwarding plane.
5. The method for protecting services of a relay separation architecture VBRAS according to claim 1, wherein the obtaining of the forwarding plane switching state of the target forwarding plane and the protecting of the services corresponding to the user forwarding table according to the forwarding plane switching state comprise:
acquiring a service port state, a link state, a control channel state between a forwarding plane and a control plane, and a program execution state of the forwarding plane of the new online session, and determining a forwarding plane switching state of the target forwarding plane according to the service port state, the link state, the control channel state, and the program execution state;
and protecting the service corresponding to the user forwarding table according to the forwarding table switching state.
6. The traffic protection method of VBRAS of a transport control separation architecture of claim 5, wherein before protecting the traffic corresponding to the user forwarding table according to the forwarding plane switching state, the traffic protection method of VBRAS of a transport control separation architecture further comprises:
and when the target forwarding plane is switched, the service flow in the switching time is saved, and after the switching is successful, the service flow is continuously forwarded through a new target forwarding plane until the user actively goes offline.
7. The traffic protection method of VBRAS with a transfer control separation architecture of claim 5, wherein the protecting the traffic corresponding to the user forwarding table according to the forwarding plane status comprises:
when the forwarding plane switching state is an activated state, receiving an authentication request signaling of a user and adding a user forwarding table;
when the switching state of the forwarding plane is a maintaining state, a new session control request is not accepted, and the signaling monitoring function is closed;
and when the switching state of the forwarding plane is a closed state, the target forwarding plane does not work, the target forwarding plane is subjected to fault analysis, and the service corresponding to the user forwarding plane is protected according to the fault analysis result.
8. The method for protecting services of a relay separation architecture VBRAS according to claim 7, wherein when the switching state of the forwarding plane is an off state, the target forwarding plane does not operate, the target forwarding plane is subjected to failure analysis, and services corresponding to the user forwarding table are protected according to a failure analysis result, including:
when the switching state of the forwarding plane is a closed state, the target forwarding plane does not work, fault analysis is carried out on the target forwarding plane, and a fault analysis result is obtained;
when the fault analysis result indicates that the target forwarding plane is an undeployed forwarding plane, re-determining the forwarding plane with the lowest load value as a new target forwarding plane;
and when the fault analysis result shows that the target forwarding plane is the fault forwarding plane, acquiring preset time, setting the fault forwarding plane to be in a switching state within the preset time, and searching a new target forwarding plane to complete online, thereby protecting the service corresponding to the user forwarding plane.
9. The traffic protection method of VBRAS of any one of claims 1 to 8, wherein before calculating the load values of the forwarding planes of the VBRAS according to a preset balancing algorithm and determining the target forwarding plane with the current lowest load value according to the load values, the traffic protection method of VBRAS further comprises:
and distributing the preset configuration parameters to each forwarding plane of the VBRAS of the pooling type forwarding separation framework so that the user configurations on each forwarding plane are consistent and the signaling request for user session control can be received.
10. A traffic protection system of a relay separation architecture VBRAS is characterized in that the traffic protection system of the relay separation architecture VBRAS comprises:
the forwarding plane load balancing module is used for calculating load values of all forwarding planes of the VBRAS according to a preset balancing algorithm and determining a target forwarding plane with the current lowest load value according to the load values;
the forwarding plane control module is used for the target forwarding plane to report the first request authentication signaling to the control plane, and a user forwarding table is generated on the control plane and is sent to the target forwarding plane;
and the protection module is used for acquiring the forwarding plane switching state of the target forwarding plane and protecting the service corresponding to the user forwarding table according to the forwarding plane switching state.
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