WO2023124480A1

WO2023124480A1 - Route advertisement method and apparatus, device, and storage medium

Info

Publication number: WO2023124480A1
Application number: PCT/CN2022/127921
Authority: WO
Inventors: 龚霞; 黄灿灿; 杨冰; 朱永庆
Original assignee: 中国电信股份有限公司
Priority date: 2021-12-29
Filing date: 2022-10-27
Publication date: 2023-07-06
Also published as: CN114301823A; CN114301823B

Abstract

Embodiments of the present application disclose a route advertisement method and apparatus, an electronic device, and a storage medium. The method is applied to a control plane network element of a vBRAS, and comprises: establishing a neighbor relationship with network devices so as to become a route neighbor with the network devices; learning a network route advertised by a network device, so as to generate a route forwarding entry according to the network route; and synchronizing the route forwarding entry to each vBRAS forwarding device deployed by a forwarding plane network element of the vBRAS, so that the vBRAS forwarding device forwards a user packet to a corresponding network device according to the route forwarding entry.

Description

Route notification method, device, equipment and storage medium

Related Publication Cross-References

This disclosure is based on the disclosure of CN application number CN202111647326.X with the filing date of December 29, 2021, and claims its priority. The disclosure content of this CN publication is hereby incorporated into this disclosure as a whole.

technical field

The present disclosure relates to the technical field of communication, and in particular to a route notification method, device, equipment and computer-readable storage medium.

Background technique

The vBRAS (virtual broadband access server, Rirtualization Broadband Remote Access Server) technology is a hotspot in cloud-based deployment of metropolitan area networks. Among them, the separation of transfer and control vBRAS includes a control plane (CP, Control Plane) and a control plane (UP, User Plane), of which UP is divided into a dedicated hardware forwarding plane (pUP) and a virtualized forwarding plane (vUP). , using CP cloud-based centralized deployment, the control plane can manage multiple forwarding planes, and schedule users, traffic, and resources between multiple forwarding planes. Compared with a single machine, the utilization rate and reliability of equipment can be greatly improved.

Contents of the invention

According to the first aspect of the present disclosure, a route notification method is provided, which is applied to the control plane network element of the virtual broadband access server vBRAS, including: establishing a neighbor relationship with the network device to become a route neighbor with the network device; The network route notified by the network device, so as to generate a route forwarding entry according to the network route; and synchronize the route forwarding table item to each vBRAS forwarding device deployed on the forwarding plane network element of the vBRAS, so that the vBRAS forwards The device forwards the user packet to the corresponding network device according to the routing and forwarding entry.

In some embodiments, the method further includes: while learning the network route announced by the network device, notifying the user route to the network device according to the access user, so that the network device generates a second forwarding entry , and forward the corresponding second user packet to the corresponding vBRAS forwarding device according to the second forwarding entry, and the user route is used to describe the next-hop vBRAS forwarding device.

In some embodiments, the network device is a Leaf device of a metropolitan area leaf-spine Spine-Leaf network, and establishing a neighbor relationship with the network device to become a routing neighbor includes: communicating with the Spine-Leaf network through the Border Gateway Protocol BGP The leaf devices establish a neighbor relationship and become BGP neighbors.

In some embodiments, before establishing a neighbor relationship with the network device to become a routing neighbor with the network device, the method further includes: if it is determined that the vBRAS forwarding device has established a BGP neighbor relationship with the network device , then control the vBRAS forwarding device to disconnect from the network device.

In some embodiments, the synchronizing the routing and forwarding entries to each vBRAS forwarding device in the forwarding plane network element of the vBRAS includes: storing the routing and forwarding entries in a local database, and synchronizing the routing and forwarding entries based on the database The technology synchronizes the routing and forwarding entries in the local database to each vBRAS forwarding device in the forwarding plane network element of the vBRAS.

In some embodiments, the synchronization of the routing and forwarding entries in the local database to each vBRAS forwarding device in the forwarding plane network element of the vBRAS based on the database synchronization technology includes: separating the CUPS interface from the control plane and the user plane. The routing and forwarding entries in the database are synchronized to each vBRAS forwarding device in the forwarding plane network element of the vBRAS.

In some embodiments, after synchronizing the routing and forwarding entries to each vBRAS forwarding device in the forwarding plane network element of the vBRAS, includes: when the route is updated, the vBRAS control plane network element learns the network device Notified routing update information, so as to update the routing forwarding entry according to the routing updating information; and synchronize the updated routing forwarding entry to each vBRAS forwarding device in the forwarding plane network element of the vBRAS.

According to the second aspect of the present disclosure, there is provided a route notification device, which is configured in the control plane network element of the virtual broadband access server vBRAS, and includes: a relationship establishment module, which establishes a neighbor relationship with a network device, so as to become a neighbor relationship with the network device A route neighbor; a route learning module, learning the network route advertised by the network device, so as to generate a route forwarding table item according to the network route; a route synchronization module, synchronizing the route forwarding table item to the forwarding plane network element of the vBRAS Each vBRAS forwarding device is deployed, so that the vBRAS forwarding device forwards the user message to the corresponding network device according to the routing forwarding entry.

According to a third aspect of the present disclosure, there is provided an electronic device, the electronic device includes: one or more processors; a storage device for storing one or more programs, when the one or more programs are used by the one When executed by one or more processors, the electronic device implements the method as described above.

According to a fourth aspect of the present disclosure, there is provided a computer-readable storage medium having computer-readable instructions stored thereon, computer-readable instructions stored thereon, and when the computer-readable instructions are executed by a processor of a computer, The computer is caused to execute the method as described above.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure or related technologies, the following will briefly introduce the drawings that need to be used in the description of the embodiments or related technologies. Obviously, the drawings in the following description are only For some embodiments of the present disclosure, for those skilled in the art, other drawings can also be obtained according to these drawings on the premise of not paying creative efforts.

FIG. 1 is a schematic diagram of a network of a route notification system involved in the related art;

FIG. 2 is a schematic diagram of an implementation environment involved in the present disclosure;

Fig. 3 is a flowchart of a route advertisement method shown in some exemplary embodiments of the present disclosure;

FIG. 4 is a flowchart in an example after step S130 in the route advertisement method shown in FIG. 3;

Fig. 5 is a schematic diagram of a network of a route advertisement system shown in some exemplary embodiments of the present disclosure;

Fig. 6 is a flow chart of another route advertisement method shown in some exemplary embodiments of the present disclosure;

Fig. 7 is a schematic structural diagram of a route notification device shown in some exemplary embodiments of the present disclosure;

FIG. 8 shows a schematic structural diagram of an electronic device suitable for implementing the embodiments of the present disclosure.

Detailed ways

Reference will now be made in detail to exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, the same numerals in different drawings refer to the same or similar elements unless otherwise indicated. The implementations described in the following exemplary examples do not represent all implementations consistent with the present disclosure. Rather, they are merely examples of apparatuses and methods consistent with aspects of the present disclosure as recited in the appended claims.

The block diagrams shown in the drawings are merely functional entities and do not necessarily correspond to physically separate entities. That is, these functional entities may be implemented in software, or in one or more hardware modules or integrated circuits, or in different networks and/or processor devices and/or microcontroller devices entity.

The flow charts shown in the drawings are only exemplary illustrations, and do not necessarily include all contents and operations/steps, nor must they be performed in the order described. For example, some operations/steps can be decomposed, and some operations/steps can be combined or partly combined, so the actual order of execution may be changed according to the actual situation.

It should also be noted that: the "plurality" mentioned in the present disclosure refers to two or more. "And/or" describes the association relationship of associated objects, indicating that there may be three types of relationships. For example, A and/or B may indicate: A exists alone, A and B exist simultaneously, and B exists independently. The character "/" generally indicates that the contextual objects are an "or" relationship.

The present disclosure will be described more fully hereinafter with reference to the accompanying drawings, in which exemplary embodiments of the present disclosure are illustrated. The following will clearly and completely describe the technical solutions in the embodiments of the present disclosure with reference to the drawings in the embodiments of the present disclosure. Apparently, the described embodiments are only some of the embodiments of the present disclosure, not all of them. Based on the embodiments in the present disclosure, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present disclosure. The technical solution of the present disclosure will be described in various aspects in conjunction with various figures and embodiments below.

In the related technologies known to the inventor, the vBRAS route notification scheme is that the pUP supports routing-related functions. When the user goes online, each pUP completes the route notification. This method consumes a lot of equipment resources, high equipment costs, and slow route notification.

Please refer to Figure 1. Figure 1 is a schematic diagram of the network of the existing vBRAS route notification in the related art. The network element of the forwarding plane of the vBRAS forwarding pool is deployed with a pUP pool, and each pUP in the pUP pool establishes BGP routes with two Leaf devices respectively. Neighbors learn the same route respectively. When there is a route update, each pUP needs to learn the updated route separately and generate a forwarding entry. This method consumes a lot of device resources, and the route notification is slow; the pUP forwarding plane also needs to support routing-related functions, and the device cost is high.

In view of this, a technical problem to be solved in the present disclosure is to provide a route notification method, a route notification device, an electronic device, and a computer-readable storage medium, which realize efficient learning and synchronization of routing information and improve message forwarding efficiency; at the same time, Simplifies the functional requirements of forwarding equipment.

Please refer to FIG. 2 , which is a schematic diagram of an implementation environment involved in the present disclosure. The implementation environment includes the control plane network element 10 of the virtual broadband access server vBRAS, the network device 20 and the forwarding plane network element 30 of the vBRAS, wherein the forwarding plane network element of the vBRAS is deployed with multiple vBRAS forwarding devices pUP301, 302, 303, 304: The control plane network element 10 and the network device 20 communicate through a wired network, and the network device 20 and the vBRAS forwarding device pUP communicate through a wired network;

The control plane network element 10 is used to establish a neighbor relationship with the network device, so as to become a routing neighbor with the network device; learn the network route advertised by the network device, and generate a routing forwarding entry according to the network routing; the routing forwarding table is used to describe message forwarding path; synchronize the routing and forwarding entries to each vBRAS forwarding device in the forwarding plane network element of the vBRAS.

Each vBRAS forwarding device in the forwarding plane network element 30 of the vBRAS forwards the user message to the corresponding network device 20 according to the routing and forwarding entry.

Among them, the control plane network element of vBRAS is implemented by a general server, and the routing function needs to be deployed, and the forwarding plane network element of vBRAS is also implemented by a general server, which simplifies the deployment of the routing function; it can be an independent physical server, or it can be composed of multiple physical servers It can also provide cloud services, cloud databases, cloud computing, cloud functions, cloud storage, network services, cloud communications, middleware services, domain name services, security services, CDN (Content Delivery Network, content distribution network) and cloud servers, which are not limited here. The vBRAS forwarding device of the vBRAS forwarding plane NE is a dedicated hardware forwarding plane device.

Please refer to FIG. 3. FIG. 3 is a flowchart of a route advertisement method shown in some exemplary embodiments of the present disclosure. The route advertisement method is executed by the control plane network element 10 of the vBRAS shown in FIG. 2. The route advertisement method includes steps From S110 to step S130, the details are as follows:

S110. Establish a neighbor relationship with the network device, so as to become a routing neighbor with the network device.

In some embodiments of the present disclosure, the network element of the control plane establishes a neighbor relationship with the network device, where the network device refers to a device that can access the Internet and forward packets to the Internet. Optionally, the network element of the control plane and At least two network devices establish a neighbor relationship, and a communication connection is also established between at least two network devices.

After the neighbor relationship is established, the control plane NE and the network device become neighbors.

Optionally, the control plane network element may further establish an adjacency relationship with the network device, and the adjacency relationship refers to a neighbor relationship that can exchange link state information and routing information.

In some embodiments of the present disclosure, the network device is a Leaf device of a metropolitan Spine-Leaf (leaf-spine architecture, leaf-spine network architecture) network, and Spine-Leaf refers to a novel two-layer network connection structure; here The leaf (leaf) refers to the endpoint or edge layer network device; and the spine (spine) is the core and center layer network device, which is responsible for connecting with the leaf device. The vBRAS forwarding device can access the MAN through the spine-leaf network. At this time, establishing a neighbor relationship with the network device includes:

The vBRAS control plane network element establishes a neighbor relationship with the Leaf device of the spine-leaf network through BGP (Border Gateway Protocol) to become a BGP neighbor.

BGP is a core decentralized autonomous routing protocol on the Internet. It achieves reachability between autonomous systems (AS) by maintaining IP routing tables or prefix tables, and belongs to vector routing protocols.

The process of establishing a neighbor relationship with a Leaf device on a Spine-Leaf network through the BGP protocol includes: using the LOOPBACK interface (the loopback interface is a virtual interface of pure software nature) to send TCP (Transmission Control Protocol) messages and peers The peers establish BGP neighbor relationships, and BGP completes operations such as neighbor establishment and route update through message exchange. There are five message types: Open, Update, Notification, Keepalive, and Route-refresh.

Open message: It is the first message sent after a TCP connection is established, and is used to establish a connection relationship between BGP neighbors. After receiving the Open message and successfully negotiating, the leaf device on the spine-leaf network will send a Keepalive message to confirm and maintain the validity of the connection. After confirmation, the control plane NE and the leaf device on the spine-leaf network can exchange Update, Notification, Keepalive and Route-refresh messages. Update message: used to exchange routing information between BGP neighbors. The Update message can advertise multiple pieces of reachable routing information with the same attributes, and can also revoke multiple pieces of unreachable routing information. An Update message can advertise multiple reachable routes with the same route attribute, and these routes can share a set of route attributes. All routing attributes contained in a given Update message apply to all destinations (indicated by IP prefixes) in the NLRI (Network Layer Reachability Information) field in the Update message. One Update message can withdraw multiple unreachable routes. Each route through a destination (indicated by an IP prefix) clearly defines previously advertised routes between BGP routers. An Update message can only be used to withdraw the route, so there is no need to include path attributes or NLRI. On the contrary, it can also be used only to advertise reachable routes, and there is no need to carry revocation route information. Notification message: When an NE on the control plane or a leaf device in the spine-leaf network detects an error state, it sends a Notification message to the neighbor, and then the BGP connection is immediately interrupted. Keepalive packets: Control plane NEs or leaf devices in the spine-leaf network periodically send Keepalive packets to neighbors to keep the connection valid.

In some embodiments of the present disclosure, before establishing a neighbor relationship with the network device to become a routing neighbor with the network device, the route advertisement method further includes: if it is determined that the vBRAS forwarding device has established a BGP neighbor relationship with the network device, then controlling the vBRAS The forwarding device is disconnected from the network device.

It can be understood that the control plane network element can manage multiple vBRAS forwarding devices in the forwarding plane network element; therefore, in some embodiments of the present disclosure, the control plane network element can send a query message to each vBRAS forwarding device to query the vBRAS Whether the forwarding device has established a BGP neighbor relationship with the network device. After receiving the inquiry message, the vBRAS forwarding device can feed back a message to the control plane network element to inform whether it has established a BGP neighbor relationship with the network device, and then when the control plane notifies the feedback message When it is determined that a BGP neighbor relationship has been established between the vBRAS forwarding device and the network device, a disconnection message may be sent to the vBRAS forwarding device, so that the vBRAS forwarding device is disconnected from the network device.

For example, when the vBRAS forwarding device has established a BGP neighbor relationship with the network device, the control plane NE can control the vBRAS forwarding device to send Notification packets to the network device, or not send Keepalive packets to the network device within a specified time, so that the vBRAS forwards the device Disconnect the BGP connection with the network device.

When it is determined that the vBRAS forwarding device is disconnected from the network device, the network element on the control plane establishes a neighbor relationship with the network device, and the vBRAS forwarding device does not need to establish a neighbor relationship with the network device to transfer the routing control function from the vBRAS forwarding device on the forwarding plane To the network element of the control plane, the separation of transfer and control is truly realized.

S120. Learn the network route advertised by the network device, so as to generate a route forwarding entry according to the network route.

In some embodiments of the present disclosure, after the neighbor relationship is established, the network device may advertise the network route to the control plane network element, and the network route may be an external network route, for example, the first The third device generates the network route, the third device sends the network route to the leaf device, and the leaf device notifies the network element of the control plane. Certainly, the network route may also be generated by the Leaf device.

After the leaf device advertises the network route to the control plane NE, the control plane NE can learn the network route to generate a routing forwarding entry based on the network route. Wherein, the network routing includes the process of determining the network scope of the end-to-end path from the source to the destination; it can be understood that the network routing may include one or more routing information.

After learning the network route, the control plane network element can generate a routing forwarding entry according to multiple routing information of the network routing, and the routing forwarding entry is used to describe the network path for packet forwarding. Optionally, the route forwarding table entry includes multiple forwarding table entries, and each forwarding table entry specifies a destination to be reached, the outgoing interface to be passed and the next hop IP address, etc., for example, including routing, network segment, next hop, and outbound interface. That is, through the routing and forwarding entry, it will know how to transmit data to the other end.

In some embodiments of the present disclosure, network devices can also learn routes, and the route advertisement method provided in this embodiment also includes:

While learning the network route announced by the network device, notify the user route to the network device according to the access user, so that the network device generates a second forwarding entry, and forwards the corresponding user packet to the corresponding vBRAS forwarding device, user route is used to describe the vBRAS forwarding device of the next hop.

It should be noted that control plane network elements and network devices can learn routes from each other, and user routes are used to describe the vBRAS forwarding device whose next hop is the user online; for example, as shown in Figure 2, user routes are used to describe the next hop as The vBRAS forwarding device 301 that the user goes online further generates a second forwarding table entry that includes the vBRAS forwarding device 301 and the outbound interface of the Leaf device as the next hop.

Optionally, the network route is a BGP route. After the control plane NE establishes a BGP neighbor relationship with the network device, the network device notifies the control plane NE of the BGP route, and the control plane NE notifies the user route to the network device, and then the network device learns the user route. Routing, generating its own second forwarding table entry; when the network device receives a user message and needs to forward the user message to the vBRAS forwarding device, it determines the vBRAS forwarding device corresponding to the user message according to the second forwarding table item, and realizes Accurate forwarding of user packets.

S130. Synchronize the routing and forwarding entries to each vBRAS forwarding device deployed on the forwarding plane network element of the vBRAS, so that the vBRAS forwarding device forwards the user packet to the corresponding network device according to the routing and forwarding entry.

In some embodiments of the present disclosure, after the control plane network element generates the routing and forwarding table entry, it needs to synchronize the routing and forwarding table entry to each vBRAS forwarding device deployed by the forwarding plane network element of the vBRAS, which can realize efficient learning and synchronization of routing information, Improve packet forwarding efficiency. At the same time, it simplifies the functional requirements of pUP equipment, reduces the deployment cost of vBRAS equipment, and further promotes the cloudification and intelligence of the network based on the further decoupling of forwarding plane and control plane functions.

It should be noted that the vBRAS forwarding devices deployed on the forwarding plane network elements that synchronize the routing and forwarding entries to the vBRAS include:

The routing and forwarding table items are stored in the local database, and based on the database synchronization technology, the routing and forwarding table items in the local database are synchronized to each vBRAS forwarding device in the forwarding plane network element of the vBRAS.

In some embodiments of the present disclosure, the control plane network element is deployed with a database module, and the database module is used to provide a database for data storage; after generating the routing and forwarding entry, the control plane network element stores the routing and forwarding entry in In the database, the routing and forwarding entries in the database are synchronized to each vBRAS forwarding device through database synchronization technology. .

Optionally, the database synchronization technology may implement synchronization operations between databases in a publish-subscribe manner. There are two steps to publish and subscribe: 1. Publish. 2. Subscribe. First, publish the data to be synchronized on the control plane network element, and then subscribe to the above publication on the vBRAS forwarding device.

Database synchronization technology can also be implemented through SQL job or mysql database synchronization; it can also be through the CUPS (Control and User Plane Separation, control and user plane separation) interface to send routing forwarding table items to each vBRAS forwarding device, for example The Sx interface or N4 interface can meet the low-latency requirements of the network in milliseconds and realize fast synchronization.

When the route is updated, the routing and forwarding entries also need to be updated. As shown in FIG. Notification methods also include:

S140. When the route is updated, learn the route update information advertised by the network device, so as to update the route forwarding entry according to the route update information.

In some embodiments of the present disclosure, when there is a routing update, the network device will notify the routing update information, which may only include updated routing information, for example, when a router A is added to the network, the routing update information Including the updated routing information of router A; the control plane network element learns the routing update information advertised by the network device, and updates the routing forwarding entry according to the routing updating information. For example, a new route, network segment, next hop, and outbound interface are added to the updated routing and forwarding entry.

In some other embodiments, the routing update information may also be all updated routing information. For example, if the network device learns the routing information of the added router A, the original routers B, and C, the routing updating information may also include all the routing information of the routers. The routing information, and then when the control plane network element learns the routing update information, it can be compared with the original routing to ensure the accuracy of the routing information.

S150. Synchronize the updated routing forwarding entry to each vBRAS forwarding device in the forwarding plane network element of the vBRAS.

After the routing and forwarding table item is updated, the updated routing and forwarding table item is stored in the local database to replace the original routing and forwarding table item. Optionally, the updated routing and forwarding table item is synchronized to each In the vBRAS forwarding device, information interaction between the network device and each vBRAS forwarding device is reduced, and network management is simplified.

For ease of understanding, this embodiment uses a more specific application scenario to illustrate the route advertisement method, and the route advertisement method is implemented by a route advertisement system. The route notification system includes vBRAS and Leaf devices of the Spine-Leaf network. The network diagram is shown in Figure 5. Based on the route notification system, as shown in Figure 6, the route notification method includes:

S610. The system is initialized, and the vBRAS is deployed in a manner of separation of transfer and control.

CP cloudification and deployment of routing function modules and database modules, pUP into a pool and simplify routing functions;

S620. The CP establishes a BGP neighbor relationship with the leaf device on the spine-leaf network.

Optionally, the CP uses the LOOPBACK interface to send TCP packets to establish a BGP neighbor relationship with the Leaf device.

After the BGP neighbor relationship is established, the leaf device advertises the external BGP route to the CP, and the external BGP route is obtained by the leaf device learning the route advertised by the neighbor device;

The CP notifies the user route to the Leaf device. Specifically, when the user dials up and goes online, the CP allocates a network segment to the pUP, and the pUP generates the user route, and the CP notifies the Leaf device of the user route, that is, the next hop is the LOOPBACK address of the pUP.

S630, the CP will generate a routing forwarding entry based on the learned BGP route, and store it in the database;

When the CP learns multiple BGP routes (paths) to the same destination network, the CP loads these routes into the BGP routing table, and performs routing optimization among these entries according to the BGP routing optimization rules, and finally decides the optimal route. (Best) the route to the network, so as to determine the optimal multiple routes to different networks, and generate a routing forwarding entry, and store the routing forwarding entry in the database.

For example, the CP learns BGP route 1 from Leaf device 1 to Internet 1, learns BGP route 2 from Leaf device 2 to Internet 1, and selects the route to Internet 1 as BGP1, then generates routing forwarding entries based on BGP1. .

Of course, when the leaf device also learns the user routes advertised by the CP, it also generates route forwarding entries.

S640, the CP quickly synchronizes the routing and forwarding entry information to each pUP device through the CU separation interface;

The CP notifies the CU separation interface to quickly synchronize the routing and forwarding entries in the database to each pUP device.

S650. The pUP forwards the user message to the corresponding Leaf device according to the forwarding table.

pUP receives the user packet sent by the user. If the user packet needs to be sent to Internet 1, pUP forwards the user packet to Leaf device 1 according to the routing forwarding entry, and then Leaf device 1 forwards it to Internet 1. .

Of course, after the Leaf device generates the route forwarding entry, if it receives a user packet from the Internet, it forwards the user packet to the corresponding pUP device according to its own forwarding table.

S660. When there is a routing update, the leaf device and the CP notify the updated routing information.

When there is a routing update, for example, Leaf device 1 can still go to Internet 2, then Leaf device 1 notifies the CP of the added routing information Leaf device 1-Internet 2, and then the CP learns the added routing information and updates the routing forwarding entry , and then synchronize the updated routing and forwarding entries to each pUP device.

The route notification method provided by this embodiment is aimed at the problem that each pUP needs to establish a BGP neighbor with the external network, and learning the same route consumes network resources. The CP establishes a BGP neighbor with the external network and advertises the route to generate a route forwarding entry. , based on the database synchronization method, the routing and forwarding entry information is sent to each pUP device. There is no need for each pUP device to learn routes, and CP-based fast learning of routes and delivery of forwarding tables to pUP improves packet forwarding efficiency; at the same time, it simplifies the functional requirements of pUP devices, simplifies the route notification process, and improves packet forwarding efficiency; The functional requirements of the pUP device are reduced, and the cost of the device is reduced, which can solve the problem that each pUP and Leaf device in vBRAS establish BGP neighbors to learn the same route and consume device resources; at the same time, the routing control function is transferred from the pUP to the CP, and the separation of transfer and control is truly realized. , further enhance the programmability of the network, and promote the process of network cloudification and intelligence.

The following introduces device embodiments of the present disclosure, which can be used to implement the route advertisement method in the foregoing embodiments of the present disclosure. For the details not disclosed in the embodiment of the device disclosed in the present disclosure, please refer to the embodiment of the above-mentioned route advertisement method in the present disclosure.

As shown in FIG. 7, FIG. 7 is a schematic structural diagram of a route notification device according to some exemplary embodiments of the present disclosure. The route notification device is configured on the control plane network element of the virtual broadband access server vBRAS, including:

The relationship establishment module 710, establishes a neighbor relationship with the network device, so as to become a routing neighbor with the network device;

The route learning module 720 learns the network route advertised by the network device, so as to generate a route forwarding entry according to the network route;

The routing synchronization module 730 synchronizes the routing and forwarding entries to each vBRAS forwarding device deployed on the forwarding plane network element of the vBRAS, so that the vBRAS forwarding device forwards the user packet to the corresponding network device according to the routing and forwarding table.

In some embodiments of the present disclosure, based on the foregoing solution, the route notification device further includes a notification module, which is specifically configured to notify the user route to the network device according to the access user while learning the network route notified by the network device, so that The network device generates a second forwarding entry, and forwards the corresponding second user packet to the corresponding vBRAS forwarding device according to the second forwarding entry, and the user route is used to describe the next-hop vBRAS forwarding device.

In some embodiments of the present disclosure, based on the aforementioned solution, the network device is a Leaf device of a metropolitan area leaf-spine Spine-Leaf network, and the relationship establishing module 710 is specifically used to establish the relationship with the Leaf device of the Spine-Leaf network through Border Gateway Protocol BGP Neighbor relationship to become a BGP neighbor.

In some embodiments of the present disclosure, based on the aforementioned solution, the route notification device further includes a route control module. Before establishing a neighbor relationship with the network device to become a route neighbor with the network device, the route control module is used to determine whether the vBRAS forwarding device is connected to the When the network device has established a BGP neighbor relationship, control the vBRAS forwarding device to disconnect from the network device.

In some embodiments of the present disclosure, based on the aforementioned solution, the route synchronization module 730, specifically for synchronizing the route and forwarding entries to each forwarding device in the forwarding plane network element of the vBRAS, includes: storing the route and forwarding entries in a local database , and based on the database synchronization technology, the routing and forwarding entries in the local database are synchronized to each vBRAS forwarding device in the forwarding plane network element of the vBRAS.

In some embodiments of the present disclosure, based on the foregoing solution, the route synchronization module 730 is further configured to synchronize the route forwarding entries in the database to each vBRAS forwarding device in the forwarding plane network element of the vBRAS by separating the CUPS interface from the control plane and the user plane .

In some embodiments of the present disclosure, based on the foregoing solution, the route notification device further includes a route update module, which is used for vBRAS control plane network elements to learn the route update information advertised by the network device when the route is updated, so as to The update information updates the routing and forwarding table items; the updated routing and forwarding table items are synchronized to each vBRAS forwarding device in the forwarding plane network element of the vBRAS.

It should be noted that the device provided by the above embodiment and the method provided by the above embodiment belong to the same concept, and the specific way of performing operations of each module and unit has been described in detail in the method embodiment, and will not be repeated here. .

The device provided in this embodiment establishes a neighbor relationship between network elements on the control plane and network devices, learns routes from each other and stores the generated routing forwarding table in the database, and then sends the routing forwarding table items to each The vBRAS forwards the device to implement table entry synchronization. Rapidly learn routes based on network elements on the control plane and synchronously deliver routing forwarding tables to each vBRAS forwarding device, which can realize efficient learning and synchronization of routing information and improve packet forwarding efficiency. At the same time, it simplifies the functional requirements of vBRAS forwarding devices and reduces vBRAS Equipment deployment costs, and based on the further decoupling of the functions of the forwarding plane and the control plane, further promote the cloudification and intelligence of the network.

In some exemplary embodiments, an electronic device includes one or more processors; a storage device for storing one or more programs, and when one or more programs are executed by the one or more processors, the electronic device The device implements the method as before.

The electronic device may be installed on a control plane network element of the vBRAS. FIG. 8 is a schematic structural diagram of an electronic device according to some exemplary embodiments.

It should be noted that the electronic device is only an example adapted to the present disclosure, and should not be regarded as providing any limitation on the application scope of the present disclosure. Nor should the electronic device be construed as being dependent on or having to have one or more components in the exemplary electronic device shown in FIG. 8 .

As shown in FIG. 8 , in some exemplary embodiments, the electronic device includes a processing component 801 , a memory 802 , a power supply component 803 , a multimedia component 804 , an audio component 805 , a processor 806 , a sensor component 807 and a communication component 808 . Wherein, the above-mentioned components are not all necessary, and the electronic device may add other components or reduce certain components according to its own functional requirements, which is not limited in this embodiment.

The processing component 801 generally controls the overall operation of the electronic device, such as operations associated with display, data communication, and log data synchronization. The processing component 801 may include one or more processors 806 to execute instructions to complete all or part of the steps of the above operations. Additionally, processing component 801 may include one or more modules to facilitate interaction between processing component 801 and other components. For example, the processing component 801 may include a multimedia module to facilitate interaction between the multimedia component 804 and the processing component 801 .

The memory 802 is configured to store various types of data to support operations at the electronic device, examples of such data include instructions for any application or method operating on the electronic device. One or more modules are stored in the memory 802, and the one or more modules are configured to be executed by the one or more processors 806 to complete all or part of the steps in the methods described in the above embodiments.

The power supply component 803 provides power to various components of the electronic device. Power supply components 803 may include a power management system, one or more power supplies, and other components associated with generating, managing, and distributing power to electronic devices.

The multimedia component 804 includes a screen that provides an output interface between the electronic device and the user. In some embodiments, the screen may include TP (Touch Panel, touch panel) and LCD (Liquid Crystal Display, liquid crystal display). If the screen includes a touch panel, the screen may be implemented as a touch screen to receive input signals from a user. The touch panel includes one or more touch sensors to sense touches, swipes, and gestures on the touch panel. The touch sensor may not only sense a boundary of a touch or swipe action, but also detect duration and pressure associated with the touch or swipe action.

The audio component 805 is configured to output and/or input audio signals. For example, the audio component 805 includes a microphone configured to receive an external audio signal when the electronic device is in an operation mode, such as a call mode, a recording mode and a voice recognition mode. In some embodiments, the audio component 805 also includes a speaker for outputting audio signals.

Sensor component 807 includes one or more sensors for providing status assessments of various aspects of the electronic device. For example, the sensor component 807 can detect the on/off state of the electronic device, and can also detect the temperature change of the electronic device.

The communication component 808 is configured to facilitate wired or wireless communication between the electronic device and other devices. The electronic device may access a wireless network based on a communication standard, such as Wi-Fi (Wireless-Fidelity, wireless network).

It can be understood that the structure shown in FIG. 8 is only for illustration, and the electronic device may include more or less components than those shown in FIG. 8 , or have different components from those shown in FIG. 8 . Each component shown in FIG. 8 can be implemented by hardware, software or a combination thereof.

In some exemplary embodiments, a computer-readable storage medium stores a computer program thereon, and when the computer program is executed by a processor, the foregoing method is implemented. The computer-readable storage medium may be included in the electronic device described in the above embodiments, or may exist independently without being assembled into the electronic device.

It should be noted that the computer-readable storage medium shown in the embodiments of the present disclosure may be, for example, an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, device, or device, or any combination thereof. More specific examples of computer-readable storage media may include, but are not limited to, electrical connections with one or more wires, portable computer diskettes, hard disks, random access memory (RAM), read-only memory (ROM), erasable Programmable Read-Only Memory (Erasable Programmable Read Only Memory, EPROM), flash memory, optical fiber, portable compact disk read-only memory (Compact Disc Read-Only Memory, CD-ROM), optical storage device, magnetic storage device, or any suitable one of the above The combination. In the present disclosure, a computer-readable storage medium may be any tangible medium that contains or stores a program that can be used by or in conjunction with an instruction execution system, apparatus, or device.

In the route notification method, route notification device, electronic equipment, and computer-readable storage medium in the above-mentioned embodiments, the control plane network element of the virtual broadband access server vBRAS establishes a neighbor relationship with the network device, so as to become a route neighbor with the network device; learning network The network route advertised by the device to generate routing and forwarding entries based on the network routing; the routing and forwarding entries are synchronized to each vBRAS forwarding device deployed on the forwarding plane NE of the vBRAS, so that the vBRAS forwarding device forwards user packets according to the routing and forwarding entries Forward to the corresponding network device; quickly learn the route based on the control plane network element and synchronously deliver the route forwarding table to each vBRAS forwarding device, which can realize efficient learning and synchronization of routing information and improve the efficiency of packet forwarding; at the same time, it simplifies vBRAS forwarding Equipment function requirements reduce the deployment cost of vBRAS, and based on the further decoupling of forwarding plane and control plane functions, further promote network cloudification and intelligence.

Other embodiments of the present disclosure will be readily apparent to those skilled in the art from consideration of the specification and practice of the embodiments disclosed herein. The present disclosure is intended to cover any modification, use or adaptation of the present disclosure. These modifications, uses or adaptations follow the general principles of the present disclosure and include common knowledge or conventional technical means in the technical field not disclosed in the present disclosure. .

The description of the present disclosure has been presented for purposes of illustration and description, but is not intended to be exhaustive or limited to the disclosure in the form disclosed. Many modifications and changes will be apparent to those of ordinary skill in the art. The embodiment was chosen and described in order to better explain the principles and practical application of the disclosure, and to enable others of ordinary skill in the art to understand the disclosure and design various embodiments with various modifications as are suited to the particular use.

Claims

A route notification method applied to a control plane network element of a virtual broadband access server vBRAS, the method comprising:

Establish a neighbor relationship with the network device to become a routing neighbor with the network device;

Learning the network route advertised by the network device, so as to generate a routing forwarding entry according to the network route;

Synchronize the routing and forwarding entries to each vBRAS forwarding device deployed on the forwarding plane network element of the vBRAS, so that the vBRAS forwarding device forwards user packets to corresponding network devices according to the routing and forwarding entries.
The method according to claim 1, said method further comprising:

When learning the network route announced by the network device, notify the user route to the network device according to the access user, so that the network device generates a second forwarding entry, and according to the second forwarding entry, the corresponding The second user packet is forwarded to a corresponding vBRAS forwarding device, wherein the user route is used to describe a next-hop vBRAS forwarding device.
The method according to claim 1, wherein the network device is a Leaf device of a metropolitan area leaf-spine Spine-Leaf network, and establishing a neighbor relationship with the network device to become a routing neighbor includes:

Establish a neighbor relationship with the Leaf device of the spine-leaf network through the border gateway protocol BGP, so as to become a BGP neighbor.
The method according to claim 3, before establishing a neighbor relationship with the network device to become a routing neighbor with the network device, the method further includes:

If it is determined that the vBRAS forwarding device has established a BGP neighbor relationship with the network device, control the vBRAS forwarding device to disconnect from the network device.
According to the method according to claim 1, the vBRAS forwarding devices that synchronize the routing and forwarding entries to the forwarding plane network elements of the vBRAS include:

storing the routing and forwarding entries in a local database, and synchronizing the routing and forwarding entries in the local database to each vBRAS forwarding device in the forwarding plane network element of the vBRAS based on a database synchronization technology.
According to the method according to claim 5, the synchronization of the routing and forwarding entries in the local database to each vBRAS forwarding device in the forwarding plane network element of the vBRAS based on the database synchronization technology includes:

Synchronize the routing and forwarding entries in the local database to each vBRAS forwarding device in the forwarding plane network element of the vBRAS through the CUPS interface that separates the control from the user plane.
According to the method according to any one of claims 1-6, after synchronizing the routing forwarding entry to each vBRAS forwarding device in the forwarding plane network element of the vBRAS, includes:

When the route is updated, the vBRAS control plane network element learns the route update information advertised by the network device, so as to update the route forwarding entry according to the route update information;

Synchronize the updated routing and forwarding entries to each vBRAS forwarding device in the forwarding plane network element of the vBRAS.
A route notification device, the device shown is configured in the control plane network element of the virtual broadband access server vBRAS, including:

A relationship establishment module, which establishes a neighbor relationship with the network device, so as to become a routing neighbor with the network device;

A route learning module, learning the network route advertised by the network device, so as to generate a route forwarding entry according to the network route;

A route synchronization module, synchronizing the route forwarding entry to each vBRAS forwarding device deployed on the forwarding plane network element of the vBRAS, so that the vBRAS forwarding device forwards the user packet to the corresponding Internet equipment.
An electronic device comprising:

one or more processors;

A storage device for storing one or more programs, when the one or more programs are executed by the one or more processors, the electronic device implements the program described in any one of claims 1-7 method.
A computer-readable storage medium, which is characterized in that computer-readable instructions are stored thereon, and when the computer-readable instructions are executed by a processor of a computer, the computer is made to perform any one of claims 1-7. described method.