WO2022105931A1 - Multi-stage slice edge switching device and implementation method thereof - Google Patents

Abstract

Disclosed in the embodiments of the present invention are a multi-stage slice edge switching device and an implementation method thereof, the switching device comprising a plurality of forwarding modules, each forwarding module being connected to all of the network access devices, and each forwarding module being configured to: when data traffic sent by multiple types of network access device is received, on the basis of the features of the data packets, allocate high priority data traffic to a hard pipe for full-pipeline high priority forwarding, and allocate low priority data traffic to ordinary forwarding channels for forwarding; and/or when data traffic sent by the same type of network access device is received, on the basis of the features of the data packets, mapping the data traffic to multiple QoS priority queues. By means of using multi-layer network slice technology, the embodiments of the present invention increase network reliability whilst guaranteeing the priority of search and forwarding of high priority services in the full pipeline.

Description

Multi-level slice edge switching device and its realization method

The present invention claims the priority of the Chinese patent application filed on November 23, 2020 with the application number 202011322439.8 and the invention title "Multi-level slice edge switching device and its realization method", the entire contents of which are incorporated herein by reference invention.

technical field

The present invention relates to the technical field of networks, and in particular, to a multi-level slice edge switching device and an implementation method thereof.

Background technique

Edge industrial network access equipment, such as network switching equipment, as an important part of the industrial network, has certain requirements for reliability and traffic priority guarantee, and due to the variety and quantity of industrial equipment connected to the industrial network , the reliability and security of the industrial network also put forward corresponding requirements.

With the continuous development of the industry, the equipment connected to the industrial network is no longer industrial equipment, and more and more office equipment and management equipment are gradually added to the industrial network. To meet differentiated service requirements, network slicing technology is usually used to carry a variety of industrial network services without maintaining multiple dedicated network devices. However, the network slicing technology currently used in industrial networks has only one level, that is to say, only the QoS (Quality of Service, quality of service) queue priority of traditional network equipment is used to ensure slice isolation between business data streams. Because the network slicing used in the current industrial network is not hierarchical, the following problems are prone to occur: (1) Since the high-priority and low-priority services in the industrial network are processed in one network device, there is a risk of downtime and link interruption, and the network Reliability is unstable. (2) Due to the network slicing technology implemented by traditional network devices using QoS, only the priority of queue scheduling can be guaranteed, while the forwarding pipeline in the inbound direction and the forwarding pipeline in the outbound direction inside the network device cannot guarantee that high-priority services are searched in the full pipeline. and forwarding priority. The full pipeline here refers to the forwarding pipeline in the inbound direction, the forwarding pipeline in the outbound direction, and queue scheduling.

SUMMARY OF THE INVENTION

The purpose of the embodiments of the present invention is to overcome the defects of the prior art, and provide a multi-level slice edge switching device and an implementation method thereof, which can improve network reliability and ensure the priority of search and forwarding of high-priority services in the full pipeline.

In order to achieve the above object, the embodiment of the present invention proposes the following technical solutions: a multi-level slice edge switching device, the multi-level slice edge switching device includes a plurality of forwarding modules, and each forwarding module is connected to all network access devices, And each forwarding module is configured as:

When receiving data traffic sent by various types of network access devices, according to the characteristics of the data packet, the high-priority data traffic is allocated to the hard pipe for full-pipeline high-priority forwarding, and the low-priority data traffic is allocated. forwarding to a common forwarding channel; and/or

When receiving data traffic sent by a network access device of the same type, the data traffic is mapped to multiple QoS priority queues according to the characteristics of the data packets.

Optionally, when any one of the forwarding modules is faulty, the network access device connected to the faulty forwarding module forwards the data traffic to other normally working forwarding modules.

Optionally, the forwarding module forwards the high-priority data traffic according to the IP (Internet Protocol, Internet Protocol) priority of the message or the WLAN (Wireless Local Area Network, wireless local area network) priority or preamble or quintuple information. Allocate to hard pipes, and allocate low-priority data traffic to common forwarding channels.

Optionally, the forwarding module maps the data traffic to multiple QoS priority queues according to the packet source IP address or destination IP address or source MAC (Media Access Control, media access control layer) address or destination MAC address.

Optionally, multiple QoS priority queues are queued by using an SP (Strict Priority, strict priority) queue scheduling algorithm or a WRR (Weighted Round Robin, weighted round-robin scheduling algorithm) queue scheduling algorithm.

Optionally, if the data traffic sent by multiple network access devices is mapped to the same QoS priority queue, queue scheduling is performed through the WRR queue scheduling algorithm.

Optionally, if the data traffic sent by multiple network access devices is mapped to different QoS priority queues, queue scheduling is performed by using the SP queue scheduling algorithm.

The embodiment of the present invention also discloses a method for implementing a multi-level slice edge switching device, including setting up multiple forwarding modules, each forwarding module is connected to all access devices, and each forwarding module is configured as:

When receiving data traffic sent by various types of network access devices, according to the characteristics of the data packet, the high-priority data traffic is allocated to the hard pipe for full-pipeline high-priority forwarding, and the low-priority data traffic is allocated. forwarding to a common forwarding channel; and/or

When receiving data traffic sent by a network access device of the same type, the data traffic is mapped to multiple QoS priority queues according to the characteristics of the data packets.

Optionally, the forwarding module allocates high-priority data traffic to the hard pipe according to the IP priority or WLAN priority or preamble or quintuple information of the message, and allocates low-priority data traffic to ordinary data traffic. forwarding channel.

Optionally, the forwarding module maps the data traffic to multiple QoS priority queues according to the source IP address or the destination IP address or the source MAC address or the destination MAC address of the packet.

The beneficial effects of the embodiments of the present invention are:

The multi-level slicing edge switching device and the implementation method thereof described in the embodiments of the present invention are suitable for edge and industrial networks. By adopting a multi-level network slicing scheme, on the one hand, multi-level slicing guarantee is provided, wherein the first-level network slicing The solution not only provides physical-level network slicing, but also improves the reliability and fault protection capabilities of edge and industrial networks, which is very helpful for edge and industrial network O&M and fault recovery; the second-level network slicing solution can Features Flexible allocation of data traffic to different forwarding channels (hard pipes and common forwarding channels), high-priority hard pipes can ensure the priority forwarding of the entire pipeline; the third-level network slicing scheme can meet the differences of the same type of network access devices On the other hand, it provides multi-layered, finer and more reliable edge network slicing solutions for edge and industrial networks, laying a slicing technology foundation for large-scale edge and industrial network integration deployment.

Description of drawings

1 is a schematic structural block diagram of a multi-level slice edge switching device;

Fig. 2 is a schematic diagram of data traffic transmission of network access equipment;

Fig. 3 is a schematic diagram of data flow transmission of the network access device when the forwarding module in Fig. 2 fails;

4 is a schematic diagram of a second-level network slicing scheme;

FIG. 5 is a schematic diagram of data traffic transmission of a network access device when a forwarding module fails in a third-level network slicing scheme;

Fig. 6 is the schematic diagram of data traffic mapping QoS priority queue in the third-level network slicing scheme;

7 is a schematic diagram of a message structure;

8 is a schematic diagram of the structure of an IP packet header;

FIG. 9 is a schematic flowchart of a method for implementing a multi-level slice edge switching device.

Detailed ways

The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention.

The multi-level slicing edge switching device disclosed in the embodiment of the present invention adopts the multi-level network slicing technology, which can provide a multi-level, finer, and more reliable edge network slicing solution for edge and industrial access networks, and provides a large-scale network slicing solution. The converged deployment of edge and industrial networks has laid the foundation for network slicing technology.

As shown in FIG. 1, a multi-level slice edge switching device disclosed in an embodiment of the present invention includes a plurality of forwarding modules (forwarding module 1, forwarding module 2, forwarding module 3 to forwarding module n, where n is a positive Integer), each forwarding module is connected to all network access devices, and each forwarding module is configured as:

When receiving data traffic sent by various types of network access devices, according to the characteristics of the data packet, the high-priority data traffic is allocated to the hard pipe for full-pipeline high-priority forwarding, and the low-priority data traffic is allocated. forwarding to a common forwarding channel; and/or

When receiving data traffic sent by a network access device of the same type, the data traffic is mapped to multiple QoS priority queues according to the characteristics of the data packets.

For example, in edge and industrial networks, various types of network access devices coexist. Network access devices include industrial equipment, office equipment, management equipment, etc. Requirements (QoS) have differentiated requirements. For example, industrial equipment has the highest level of real-time and reliability requirements on the network, office equipment has the lowest QoS requirements, and management equipment has medium QoS requirements. Since the network slicing solution currently adopted by edge network switching devices is mainly implemented through QoS priority queues, the single-level network slicing solution cannot achieve physical-level resource isolation and cannot improve reliability. Therefore, the embodiments of the present invention disclose The edge switching equipment has designed a three-level network slicing scheme from the three levels of physical hardware, forwarding channel and QoS priority, which effectively solves the problems of low reliability, coarse slice granularity, and slicing level caused by the existing single-level slicing scheme. single problem.

As shown in FIG. 2 and FIG. 3 , the first-level network slicing solution adopted by the multi-level slicing edge switching device according to the embodiment of the present invention is the modularization of the edge network device, that is, multiple forwarding modules are set, and the forwarding modules are connected to the network access. The equipment performs multi-link connection, that is, each network access device is connected to each forwarding module. As shown in Figure 2, 4 forwarding modules are set. The network access devices are industrial equipment, management equipment and office equipment. Among them, The industrial equipment is connected with the four forwarding modules in one-to-one correspondence, the management equipment is connected with the four forwarding modules in one-to-one correspondence, and the office equipment is connected with the four forwarding modules in one-to-one correspondence. By setting up multiple forwarding modules, the data traffic sent by different types of network access devices can be sent to different forwarding modules, and a redundant solution is provided when any forwarding module fails, that is, the Connected network access devices can forward data traffic to other functioning forwarding modules.

The first-level network slicing solution adopted by the multi-level slicing edge switching device in the embodiment of the present invention can guarantee network resources and priorities from the physical device level. In the first forwarding module, all office equipment traffic is sent to the fourth forwarding module, thereby physically isolating and ensuring that high-priority traffic forwarding is not impacted by low-priority traffic, and on the other hand, it can improve forwarding from the physical level. The reliability of the module, that is, when any forwarding module fails, the network access device can switch the data traffic to other forwarding modules that work normally. As shown in Figure 3, when the first forwarding module fails (such as downtime) When the machine or link is interrupted), the connected industrial equipment can send the data traffic to the second forwarding module, thereby improving the reliability of the forwarding module from the physical level.

As shown in Figure 4, the second-level network slicing solution adopted by the multi-level slicing edge switching device is to configure the hard pipe technology in the forwarding module, so that the forwarding module can flexibly divide different forwarding channels according to the characteristics of service packets, that is, : Allocate high-priority data traffic to hard pipes to ensure priority forwarding, and allocate low-priority data traffic to common forwarding channels for forwarding. Hard pipe technology can ensure that high-priority data traffic is fully pipelined in the forwarding module. Priority forwarding. Specifically, as shown in FIG. 7 and FIG. 8 , when the data traffic (device service traffic) sent by different types of network access devices is processed by the same forwarding module, the forwarding module is based on the characteristics of the data packets, such as IP priority, WLAN priority, preamble, and packet quintuple information, etc., allocate data traffic to hard pipes (denoted as Pipe0) and common forwarding channels (denoted as Pipe1). When any one of the forwarding modules is faulty, the normally working forwarding module forwards the data traffic sent by the network access device connected to the faulty forwarding module according to the hard pipe technology. or link terminal), the service is switched to the second forwarding module that is working normally. At this time, the second forwarding module will simultaneously receive the high-priority data traffic sent by the industrial equipment and the medium-priority data traffic sent by the management device. Since the second forwarding module is configured with hard pipe technology, it can allocate high-priority data traffic sent by industrial equipment to the hard pipe Pipe0 according to data flow characteristics, such as preambles, and allocate medium-priority data traffic sent by management equipment to ordinary In the forwarding channel Pipe1, the second forwarding module will preferentially forward the data traffic sent by the industrial equipment in the high-priority hard pipe Pipe0. In this embodiment of the present invention, a hard pipe technology is configured in each forwarding module to implement a second-level network slicing scheme. On the one hand, the forwarding priority of the full pipeline can be guaranteed, and the full pipeline includes an inbound flow forwarding pipeline, an outbound forwarding pipeline and a queue. Scheduling, on the other hand, can be used in conjunction with the third-level network slicing scheme while strictly guaranteeing the forwarding priorities of different channels.

As shown in Figure 5 and Figure 6, the third-level network slicing solution adopted by the multi-level slicing edge switching device is to configure a QoS priority queue in the common forwarding channel of the forwarding module, which is aimed at multiple network accesses of the same type. When the data traffic of the device is processed by the same forwarding module, that is, in the common forwarding channel of the forwarding module, for multiple network access devices of the same type, the data traffic is mapped to multiple QoS priorities according to the characteristics of the packets In the queue, to meet the needs of differentiated network service quality of the same type of network access equipment, multiple QoS priority queues support SP (Strict Priority, strict priority), WRR (Weighted Round Robin, weighted round-robin scheduling algorithm) queue scheduling algorithm , if the priorities of multiple network access devices are the same, that is, the data traffic sent by multiple network access devices are mapped to the same QoS priority queue, the WRR queue scheduling algorithm is used for queue scheduling processing. If If the priorities of multiple network access devices are different, the SP queue scheduling algorithm is used to perform queue scheduling processing. As shown in FIG. 5 , the second forwarding module simultaneously accesses the service data traffic of multiple management devices. According to the characteristics of the packets, such as source IP address, destination IP address, source MAC address and destination MAC address, etc. Data traffic sent by multiple management devices is mapped into 8 QoS priority queues.

In this embodiment, the forwarding module maps the data flow to 8 QoS priority queues according to packet characteristics, such as packet quintuple information, IP priority, WLAN priority, and the like.

In this embodiment, the multi-level slicing edge switching device is described in detail by taking the multi-level slicing edge switching device adopting the three-layer network slicing technology as an example, and the three-layer network slicing technology here is only an example and not a limitation. Of course, in other embodiments, other levels of network slicing technology can be set according to actual needs. Alternatively, the above-mentioned first-level network slicing scheme and the third-level network slicing method may be combined, etc. Of course, only the second-level network slicing scheme and the third-level network slicing method may be combined.

As shown in FIG. 9 , an embodiment of the present invention further discloses a method for implementing a multi-level slice edge switching device, including:

Set up multiple forwarding modules, each forwarding module is connected to all access devices,

Configure forwarding modules, and each forwarding module is configured as:

When receiving data traffic sent by various types of network access devices, according to the characteristics of the data packet, the high-priority data traffic is allocated to the hard pipe for full-pipeline high-priority forwarding, and the low-priority data traffic is allocated. forwarding to the common forwarding channel;

When receiving data traffic sent by a network access device of the same type, the data traffic is mapped to multiple QoS priority queues according to the characteristics of the data packets.

For example, in order to realize multi-level network slicing on the edge switching device, multiple forwarding modules can be set in the original switching device, and each forwarding module is connected to the network access device, that is to say, the network access device that needs to be added to the network must be Each forwarding module is connected. In addition, each forwarding module is also configured to: when receiving data traffic sent by various types of network access devices, allocate high-priority data traffic to the hard pipe according to the characteristics of the data packet for full-pipeline high-priority and/or when receiving data traffic sent by a network access device of the same type, map the data traffic to multiple QoS priority queue. In this embodiment, the edge switching device can implement three-level network slicing. Of course, in other embodiments, two-level slicing and the like can be implemented according to actual needs, and selection can be made according to actual needs. For details on how the edge switching device implements multi-level network slicing, please refer to the above, and will not be repeated here.

The multi-level slicing edge switching device and the implementation method thereof described in the embodiments of the present invention are suitable for edge and industrial networks. By adopting a multi-level (preferably three-level) network slicing scheme, on the one hand, multi-level slicing guarantee is provided, wherein, The first-level network slicing solution not only provides physical-level network slicing, but also improves the reliability and fault protection capabilities of edge and industrial networks, which is very helpful for edge and industrial network O&M and fault recovery; second-level network slicing The solution can flexibly allocate data traffic to different forwarding channels (hard pipes and common forwarding channels) according to packet characteristics, and high-priority hard pipes can ensure the priority forwarding of the entire pipeline; the third-level network slicing scheme can meet the same type of The demand for differentiated network service quality of network access equipment, on the other hand, provides multi-layered, finer and more reliable edge network slicing solutions for edge and industrial networks, laying a slicing technology for large-scale edge and industrial network integration deployment Base.

The technical content and technical features of the present invention have been disclosed as above. However, those skilled in the art may still make various replacements and modifications based on the teaching and disclosure of the present invention without departing from the spirit of the present invention. Therefore, the protection scope of the present invention should not be limited to The contents disclosed in the embodiments should include various substitutions and modifications without departing from the present invention, and are covered by the claims of this patent application.

Claims (10)

1. A multi-level slicing edge switching device, the multi-level slicing edge switching device includes a plurality of forwarding modules, each forwarding module is connected to all network access devices, and each forwarding module is configured as:

   When receiving data traffic sent by various types of network access devices, according to the characteristics of the data packet, the high-priority data traffic is allocated to the hard pipe for full-pipeline high-priority forwarding, and the low-priority data traffic is allocated. forwarding to a common forwarding channel; and/or

   When receiving data traffic sent by a network access device of the same type, the data traffic is mapped to multiple QoS priority queues according to the characteristics of the data packets.
2. The apparatus of claim 1, wherein,

   When any one of the forwarding modules is faulty, the network access device connected to the faulty forwarding module forwards the data traffic to other normal working forwarding modules.
3. The apparatus of claim 1, wherein,

   The forwarding module allocates high-priority data traffic to the hard pipe according to the IP priority or WLAN priority or preamble or quintuple information of the message, and allocates low-priority data traffic to the common forwarding channel.
4. The apparatus of claim 1, wherein,

   The forwarding module maps the data traffic to multiple QoS priority queues according to the source IP address or the destination IP address or the source MAC address or the destination MAC address of the packet.
5. The apparatus of claim 1, wherein,

   If data traffic sent by multiple network access devices is mapped to the same QoS priority queue, queue scheduling is performed through the WRR queue scheduling algorithm.
6. The apparatus of claim 5, wherein,

   If the data traffic sent by multiple network access devices is mapped to the same QoS priority queue, queue scheduling is performed through the WRR queue scheduling algorithm.
7. The apparatus of claim 5, wherein,

   If the data traffic sent by multiple network access devices is mapped to different QoS priority queues, queue scheduling is performed through the SP queue scheduling algorithm.
8. The method for implementing a multi-level slice edge switching device according to any one of claims 1 to 7, wherein:

   Set up multiple forwarding modules, each forwarding module is connected to all access devices;

   Configure the forwarding modules, each of which is configured as:

   When receiving data traffic sent by various types of network access devices, according to the characteristics of the data packet, the high-priority data traffic is allocated to the hard pipe for full-pipeline high-priority forwarding, and the low-priority data traffic is allocated. forwarding to a common forwarding channel; and/or

   When receiving data traffic sent by a network access device of the same type, the data traffic is mapped to multiple QoS priority queues according to the characteristics of the data packets.
9. The method of claim 8, wherein,

   The forwarding module allocates high-priority data traffic to the hard pipe according to the IP priority or WLAN priority or preamble or quintuple information of the message, and allocates low-priority data traffic to the common forwarding channel.
10. The method of claim 8, wherein,

    The forwarding module maps the data traffic to multiple QoS priority queues according to the source IP address or the destination IP address or the source MAC address or the destination MAC address of the packet.

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