CN111953571B

CN111953571B - vBRAS, server and storage medium

Info

Publication number: CN111953571B
Application number: CN202010743872.2A
Authority: CN
Inventors: 施鸿殊; 樊迟; 王伟
Original assignee: New H3C Technologies Co Ltd
Current assignee: New H3C Technologies Co Ltd
Priority date: 2020-07-29
Filing date: 2020-07-29
Publication date: 2022-10-21
Anticipated expiration: 2040-07-29
Also published as: CN111953571A

Abstract

The present specification provides a vbars, a server and a storage medium, the method comprising: the first sub CP is used for executing the management function and the message distribution function of the vBRAS, and the second sub CP is used for executing the access function of the UP. By the method, the vBRAS can realize automatic capacity expansion and reduction management function according to the user access condition.

Description

vBRAS, server and storage medium

Technical Field

The present disclosure relates to the field of communications technologies, and in particular, to a vbrs, a server, and a storage medium.

Background

BRAS (Broadband Remote Access Server) equipment is a product of metropolitan area network service evolution, metropolitan area network services are continuously developed, and users do not have authentication and authorization management under the condition that only Access equipment and a backbone router are provided, so that the BRAS equipment is not beneficial to operation management and long-term network development. After the BRAS equipment is introduced between the broadband access network and the backbone network, the BRAS equipment is used as an access gateway of network services, provides broadband access, authentication, authorization and charging for users, manages user bandwidth, converges user service flow, terminates user PPPOE connection, provides various service services and the like.

Meanwhile, with the development of virtualization, a transfer control separation vBRAS (virtual Broadband Remote Access Server) gradually becomes the mainstream of operator deployment, and a transfer control separation vBRAS system mainly comprises two parts, namely a control plane (BRAS-CP) and a forwarding plane (BRAS-UP):

the control plane (BRAS-CP) is positioned as a user control management component, and mainly comprises: user control management, user access control, user authentication authorization charging, address management and other functional modules;

the forwarding plane (BRAS-UP) is positioned as a three-layer network edge and user policy execution component, and mainly comprises pure forwarding plane functions such as traffic forwarding, qoS and traffic statistics, and pipeline control plane functions such as unicast routing protocol, multicast routing protocol and MPLS (LDP/TE).

Disclosure of Invention

The present specification provides a vbrs architecture, which can enable the vbrs to implement an automatic capacity expansion and reduction management function according to a user access condition.

An embodiment of the present specification provides a virtual broadband remote access server vbars, where the vbars includes a control plane CP and a forwarding plane UP, and the CP includes: a first sub CP and a second sub CP;

the first sub CP is used for executing the management function and the message distribution function of the vBRAS;

the second sub CP is used to perform an access function of the UP.

Optionally, the management function of the first sub CP specifically includes:

configuration management, address management, authority management, flexible scaling management and UP management of each sub CP.

Optionally, the message distribution function of the first sub CP specifically includes:

the first sub CP acquires a communication message between the UP and the second sub CP;

the first sub CP filters the communication message according to a preset message screening rule;

and distributing the filtered communication message to the UP or the second sub CP.

Optionally, the access function of the second sub CP specifically includes:

interface management, UP access management, access control and authorized charging.

Optionally, the vbars further includes:

the CP comprises at least one second sub CP;

the first sub CP manages the at least one second sub CP.

Optionally, the vbars further includes:

a communication channel is arranged between the first sub-CP and the second sub-CP, and the communication channel comprises: a control channel and/or a data channel.

It can be seen from the foregoing embodiments that the inventor proposes a new vbrs architecture, which creatively splits a CP, and sets a management module and a module for UP access in a first sub-CP and a second sub-CP respectively, so that the new vbrs architecture can more flexibly perform capacity expansion and reduction operations according to the number of UPs.

An embodiment of the present specification further provides a service processing method for a vbrs, where the vbrs includes a control plane CP and a forwarding plane UP, and the CP includes: a first sub-CP and a second sub-CP, wherein the first sub-CP is used for executing the management function and the message distribution function of the vrbras, and the second sub-CP is used for executing the access function of the UP, and the method includes:

when the second sub CP learns that the UP accessed to the second sub CP meets the capacity expansion and reduction condition, the second sub CP sends a capacity expansion and reduction request to the first sub CP through a communication channel between the second sub CP and the first sub CP;

and the first sub CP migrates part or all UP in the second sub CP into other second sub CPs according to the scaling request.

Optionally, the capacity expansion and reduction conditions include: the method comprises the steps of presetting a first threshold value and a second threshold value, wherein the second threshold value is larger than the first threshold value;

the method for the second CP to know that the UP of the second CP meets the capacity expansion condition comprises the following steps:

and when the second sub CP learns that the number of the UP accessed to the second sub CP is larger than or equal to the second threshold value, the capacity expansion condition is determined to be met, or when the number of the UP accessed to the second sub CP is smaller than or equal to the first threshold value, the capacity reduction condition is determined to be met.

Optionally, the migrating, by the first sub CP, part or all of UP in the second sub CP to other second sub CPs according to the capacity expansion and reduction request specifically includes:

the first sub CP selects other second sub CPs with the resource utilization rate lower than a third threshold value;

the first sub-CP informs the second sub-CP to migrate part or all UP in the second sub-CP to the other second sub-CPs so that the other second sub-CPs take over the migrated part or all UP.

The embodiment of the present specification further provides a server, where the server runs with a vbrs system, where the vbrs system includes a control plane CP and a forwarding plane UP, and the control plane CP specifically includes a first sub-CP and a second sub-CP;

the second sub CP is used to perform an access function of the UP.

The embodiment of the present specification further provides a server, where the server runs with a vbars system, and the system includes a control plane CP and a forwarding plane UP, where the CP includes: the first sub CP is used for executing the management function and the message distribution function of the vBRAS, and the second sub CP is used for executing the access function of the UP;

and the first sub CP transfers part or all UP in the second sub CP to other second sub CPs according to the scaling request.

An embodiment of the present specification further provides a server, where the server includes: a processor and a machine-readable storage medium:

the machine-readable storage medium stores machine-executable instructions executable by the processor to cause, by the processor, the processor to: implementing the functionality of any of the embodiments described above.

Embodiments of the present specification also provide a machine-readable storage medium storing machine-executable instructions that, when invoked and executed by a processor, cause the processor to: implementing the functionality of any of the embodiments described above.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present specification and together with the description, serve to explain the principles of the specification.

Fig. 1 is a schematic diagram of a vbars system according to an embodiment of the present disclosure;

fig. 2 is a schematic view of a VBRAS processing flow provided by an embodiment of the disclosure.

Detailed Description

Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. The following description refers to the accompanying drawings in which the same numbers in different drawings represent the same or similar elements unless otherwise indicated. The implementations described in the following exemplary examples do not represent all implementations consistent with this description. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the specification, as detailed in the claims that follow.

The terminology used in the description herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the description. As used in this specification and the appended claims, the singular forms "a", "an", and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It should also be understood that the term "and/or" as used herein refers to and encompasses any and all possible combinations of one or more of the associated listed items.

It should be understood that although the terms first, second, third, etc. may be used herein to describe various information, these information should not be limited to these terms. These terms are only used to distinguish one type of information from another. For example, the first information may also be referred to as second information, and similarly, the second information may also be referred to as first information, without departing from the scope of the present specification. The word "if" as used herein may be interpreted as "at" \8230; "or" when 8230; \8230; "or" in response to a determination ", depending on the context.

The existing vBRAS mainly comprises a control plane (BRAS-CP) and a forwarding plane (BRAS-UP), wherein the control plane (BRAS-CP) adopts a virtualization technology and runs on a server, and the forwarding plane (BRAS-UP) adopts traditional hardware BRAS or UP virtualized by a switch.

Although some existing technical solutions implement virtualization of the vbrs, functions such as traditional access authentication of the vbrs can be run on a virtual machine of a server, and separation of a control plane and a forwarding plane is implemented. However, the vbars function does not have a dynamic capacity expansion and reduction function, and the number of access users still has a fixed specification and cannot dynamically expand and reduce the capacity.

At present, in the face of the fact that operators do not have a vBRAS product with control separation for tens of millions of users, all manufacturers still explore with the operators, at present, a mature vBRAS architecture system does not exist, in order to use dynamic scaling capacity and meet the requirements of unified operation and maintenance management, all manufacturers explore, research and development, some systems are responsible for 5-6 role cooperative work, the system design is complex, and the operation, maintenance, management and robustness of the system are not checked.

In order to solve the above technical problem, an embodiment of the present specification provides a virtual broadband remote access server vbrs, where the vbrs includes a control plane CP and a forwarding plane UP, and the method is applied to a control plane CP device, where the CP includes: a first sub CP and a second sub CP;

the second sub CP is used to perform an access function of the UP.

In this embodiment, the CP may be composed of multiple VMs (Virtual machines) in the server, where the multiple VMs include VMs enabling a first sub CP and a second sub CP, and in an embodiment, the first sub CP may be configured to execute a management function and a message distribution function of the vbars by one VM (or may be configured by two VMs to implement a main standby function). In one embodiment, the CP includes one or more second sub-CPs, each of the second sub-CPs may carry an access function of the UP, and the one or more second sub-CPs are managed by the first sub-CP, as shown in fig. 1:

the CP includes 1 first sub-CP and 4 second sub-CPs, each second sub-CP carries an UP user, and the 4 second sub-CPs are managed by the first sub-CP, wherein the FWD-WM2 is used for executing a packet distribution function, and the function may be assumed by the first sub-CP or may be independently operated in other VMs.

In this embodiment, the VM performing the first CP function may be referred to as CTRL-VM, and the VM performing the second CP function may be referred to as BRAS-VM, where the CTRL-VM has a management function, and the management function includes: configuration management, address management, authority management, flexible scaling management and UP management of each sub CP (for the sub CP, the sub CP and/or the BRAS-VM and/or the FWD-WM); the BRAS-VM has an access function, and the access function specifically includes: interface management, UP access management, access control and authorized charging.

Specifically, the CTRL-VM management function is specifically as follows:

configuration management of each sub CP: the deployment of the BRAS-VM and the FWD-VM can be completed by running the configuration script, the master and standby identities of the BRAS-VM and the FWD-VM are controlled, and the configuration is distributed to the BRAS-VM and the FWD-VM.

Address management: and the system is responsible for the management of the local address pool of the whole CP pool, and allocates address segments according to UP, backup groups, interfaces and the like.

And (3) authority management: and the license of each BRAS-VM is applied and released.

Elastic expansion and contraction management: the capacity expansion and reduction of the BRAS-VM is supported according to the UP number, and the capacity expansion and reduction is supported according to the number of users of each BRAS-VM.

UP management: and maintaining the corresponding relation between the UP and the VBRAS-VM.

The BRAS-VM management function is specifically as follows:

interface management: apply for the address field to the CTRL-VM as a UP/backup set/interface and assign an address to each user.

UP access management: the user is managed based on the domain.

And (3) access control: the access of the user is controlled based on the interface.

And (3) authorized charging: and authenticating, authorizing and charging the user.

In this embodiment, the packet distribution function executed by the first sub CP specifically includes:

In practical application, the method can be responsible for communication and message distribution of BRAS-CP and UP. And processing the message transceiving of the BRAS-CP and an external system, such as Radius, WEB and the like.

In this embodiment, in order to implement data interworking between the sub-CPs, a communication channel is further disposed between the first sub-CP and the second sub-CP, and the communication channel may include a control channel and/or a data channel. (it should be noted that if the message distribution function in the first sub-CP is put into the VM alone, i.e. the FWD-VM, communication channels are arranged between the first sub-CP, the second sub-CP and the FWD-VM, respectively.)

It can be seen from the foregoing embodiments that, in the present embodiment, a new vbars architecture is presented, a CP in the prior art is split into modules for executing different functions, and the CP can be more flexibly scaled according to the number of access users.

An embodiment of the present specification further provides a service processing method of a vbrs, as shown in fig. 2, where the vbrs includes a control plane CP and a forwarding plane UP, and the CP includes: a first sub-CP and a second sub-CP, wherein the first sub-CP is used for executing a management function and a message distribution function of the vbars, and the second sub-CP is used for executing an access function of the UP, and the method includes:

s201, when the second sub CP learns that the UP of the second sub CP meets the capacity expansion and contraction condition, an expansion and contraction request is sent to the first sub CP through a communication channel between the second sub CP and the first sub CP;

s202, the first sub CP transfers part or all UP in the second sub CP to other second sub CPs according to the scaling request.

In this embodiment, the scaling condition may be a first threshold and a second threshold of preset access UP, where the second threshold is greater than the first threshold;

when the second sub CP finds that the UP number of the access itself is greater than or equal to the second threshold value through port monitoring, it indicates that the UP number of the access itself has reached the warning value, and at this time, it may be determined that the capacity expansion condition is satisfied.

Or, when the second sub CP finds that the UP number of itself is smaller than or equal to the first threshold through port monitoring, it indicates that the UP number of itself is too small, and at this time, it may be determined that the capacity reduction condition is satisfied.

For example, in one embodiment, UP1 to UP3 access BRAS-VM1 (first second partial CP), where UP1 and UP2 are the same backup group.

When the BRAS-VM1 finds that the number of users accessing itself is 3 by using a monitoring program, such as UCM (Universal communications Monitor), and is greater than or equal to a preset second threshold value 3, it may be determined that the BRAS-VM meets the capacity expansion condition, and at this time, a capacity expansion notification is sent to CTRL-VM (first branch CP).

After receiving the capacity expansion notification, the CTRL-VM determines whether there is a free resource in other BRAS-VMs accessed to the CTRL-VM (for example, using the number of users accessed as a screening condition), and selects the free other BRAS-VM (or enables a new BRAS-VM) as a second sub-CP, for example, selects BRAS-VM2 as the second sub-CP.

And the CTRL-VM migrates UP1 and UP2 of the same backup group into the BRAS-VM2 according to an algorithm, and concretely, the CTRL-VM informs the BRAS-VM1 to migrate UP1 and UP2, issues configuration to the BRAS-VM2 and indicates the BRAS-VM2 to migrate UP1 and UP2.

And updating the corresponding relation between the UP1 and the UP2 and the BRAS-VM2 by the CTRL-VM, and sending the corresponding relation to a transceiving module (such as the FWD-VM) so as to complete the capacity expansion step.

According to the embodiment, the CPs are layered, so that the CP can be flexibly expanded according to the number of the accessed users, additional new CPs do not need to be configured, labor cost is reduced, and expansion efficiency is improved.

In another embodiment, when the BRAS-VM1 finds that the number of users accessing itself is 1 and is equal to the preset first threshold 1 by using a monitoring program, for example, a UCM (Universal communications Monitor), it may be determined that the BRAS-VM satisfies the capacity reduction condition, and at this time, a capacity reduction notification is sent to the CTRL-VM (first sub-CP).

And after receiving the capacity reduction notice sent by the BRAS-VM1, the CTRL-VM obtains the UP information accessed in the BRAS-VM1, selects other BRAS-VMs, for example, selects the BRAS-VM3, informs the BRAS-VM1 to migrate out of the UP, and simultaneously informs the BRAS-VM3 to migrate into the UP, so that the UP in the BRAS-VM1 is completely migrated out.

According to the embodiment, the CP is layered, so that the CP can perform flexible capacity reduction according to the number of the accessed users, and resources of the server are saved.

The embodiment of the present specification further provides a server, where a vbrs system is operated in the server, and the vbrs system includes a control plane CP and a forwarding plane UP, where the control plane CP specifically includes a first sub-CP and a second sub-CP;

the second sub CP is used to perform an access function of the UP.

The embodiment of the present specification further provides a server, where a vbrs system runs in the server, and the system includes a control plane CP and a forwarding plane UP, where the CP includes: the system comprises a first sub CP and a second sub CP, wherein the first sub CP is used for executing the management function and the message distribution function of the vBRAS, and the second sub CP is used for executing the access function of the UP;

An embodiment of the present specification further provides a server, where the server includes: a processor and a machine-readable storage medium: the machine-readable storage medium stores machine-executable instructions executable by the processor, the processor being caused by the machine-executable instructions to: implementing the method or steps of any of the above embodiments.

Embodiments of the present specification also provide a machine-readable storage medium storing machine-executable instructions that, when invoked and executed by a processor, cause the processor to: implementing the method or steps of any of the above embodiments.

The foregoing description has been directed to specific embodiments of this disclosure. Other embodiments are within the scope of the following claims. In some cases, the actions or steps recited in the claims may be performed in a different order than in the embodiments and still achieve desirable results. In addition, the processes depicted in the accompanying figures do not necessarily require the particular order shown, or sequential order, to achieve desirable results. In some embodiments, multitasking and parallel processing may also be possible or may be advantageous.

Other embodiments of the present description will be apparent to those skilled in the art from consideration of the specification and practice of the invention disclosed herein. This specification is intended to cover any variations, uses, or adaptations of the specification following, in general, the principles of the specification and including such departures from the present disclosure as come within known or customary practice within the art to which the specification pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the specification being indicated by the following claims.

It will be understood that the present description is not limited to the precise arrangements described above and shown in the drawings, and that various modifications and changes may be made without departing from the scope thereof. The scope of the present description is limited only by the appended claims.

The above description is only a preferred embodiment of the present disclosure, and should not be taken as limiting the present disclosure, and any modifications, equivalents, improvements and the like made within the spirit and principle of the present disclosure should be included in the protection scope of the present disclosure.

Claims

1. A service processing method of a vBRAS is characterized in that the vBRAS comprises a Control Plane (CP) and a forwarding plane (UP), and the CP comprises: a first sub-CP and a second sub-CP, wherein the first sub-CP is used for executing the management function and the message distribution function of the vrbras, and the second sub-CP is used for executing the access function of the UP, and the method includes:

when the second sub CP learns that the UP accessed to the second sub CP meets the capacity expansion and contraction condition, an expansion and contraction request is sent to the first sub CP through a communication channel between the second sub CP and the first sub CP;

2. The method of claim 1, wherein the scalability conditions comprise: presetting a first threshold value and a second threshold value, wherein the second threshold value is larger than the first threshold value;

the method for the second sub CP to know that UP accessed to the second sub CP meets the expansion and contraction capacity condition comprises the following steps:

when the second sub CP learns that the number of UPs accessing itself is greater than or equal to the second threshold, it is determined that a capacity expansion condition is satisfied, or,

and when the second sub CP learns that the number of the UP accessing the second sub CP is less than or equal to a first threshold value, the capacity reduction condition is determined to be met.

3. The method according to claim 2, wherein the migrating, by the first sub-CP, part or all of the UPs in the second sub-CP to other second sub-CPs according to the capacity expansion and contraction request includes:

the first sub CP selects other second sub CPs of which the resource utilization rate is lower than a third threshold value;

the first sub-CP informs the second sub-CP to migrate part or all UP in the second sub-CP to the other second sub-CP, so that the other second sub-CP takes over the migrated part or all UP.

4. A server, characterized in that the server runs a vbars system, the system comprises a control plane CP and a forwarding plane UP, the CP comprises: the first sub CP is used for executing the management function and the message distribution function of the vBRAS, and the second sub CP is used for executing the access function of the UP;

5. A server, characterized in that the server comprises: a processor and a machine-readable storage medium:

the machine-readable storage medium stores machine-executable instructions executable by the processor, the processor being caused by the machine-executable instructions to: implementing the functionality of any of claims 1-3.

6. A machine-readable storage medium having stored thereon machine-executable instructions that, when invoked and executed by a processor, cause the processor to: implementing the functionality of any of claims 1-3.