WO2022179224A1 - 业务流调度方法、集中控制器以及存储介质 - Google Patents

业务流调度方法、集中控制器以及存储介质 Download PDF

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WO2022179224A1
WO2022179224A1 PCT/CN2021/133449 CN2021133449W WO2022179224A1 WO 2022179224 A1 WO2022179224 A1 WO 2022179224A1 CN 2021133449 W CN2021133449 W CN 2021133449W WO 2022179224 A1 WO2022179224 A1 WO 2022179224A1
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queue
information
flowspec
extended community
community attribute
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PCT/CN2021/133449
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English (en)
French (fr)
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黄卓君
刘志华
马俊斌
卢泉
贾曼
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中国电信股份有限公司
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Publication of WO2022179224A1 publication Critical patent/WO2022179224A1/zh

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L47/00—Traffic control in data switching networks
    • H04L47/10—Flow control; Congestion control
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
    • H04L12/46—Interconnection of networks
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L47/00—Traffic control in data switching networks
    • H04L47/10—Flow control; Congestion control
    • H04L47/24—Traffic characterised by specific attributes, e.g. priority or QoS

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  • the present disclosure relates to the field of communication technologies, and in particular, to a service flow scheduling method, a centralized controller, and a storage medium.
  • a service flow scheduling method including: a centralized controller configures a flow specification queue field based on main queue or sub-queue information of a service flow, and configures a flow specification queue field based on information of a main queue or sub-queue of a service flow, and The corresponding execution action sets the extended community attribute value; the centralized controller generates FlowSpec routing information, and adds flow matching information, the flow specification queue field and the extended community attribute value to the FlowSpec routing information; the centralized controller The controller sends the FlowSpec routing information to the network routing device, so that the routing controller of the network routing device performs traffic regulation processing according to the FlowSpec routing information.
  • the information carried in the flow specification queue field includes: queue type information and queue ID information; wherein, the queue type information is used to indicate that the queue is a main queue or a sub-queue, the main queue and its Bundled subqueues have the same queue ID information.
  • the execution action includes: minimum bandwidth guarantee and congestion management; in the case that the execution action represented by the type of the extended community attribute is minimum bandwidth guarantee, the extended community attribute value is a bandwidth guarantee value ; When the execution action represented by the type of the extended community attribute is congestion management, the value of the extended community attribute is the queue type.
  • the executing action further includes: bandwidth rate limiting; in the case that the executing action represented by the type of the extended community attribute is bandwidth rate limiting, the extended community attribute value is a rate limiting bandwidth.
  • the centralized controller establishes a BGP FlowSpec neighbor relationship with the network routing device; the centralized controller sends first FlowSpec routing information to the network routing device; wherein the first FlowSpec routing information
  • the carried information includes: flow matching information for matching with the destination IP address, a flow specification queue field corresponding to the main queue, and an extended community attribute value, where the extended community attribute value is the first rate-limited bandwidth.
  • the centralized controller sends the second FlowSpec routing information to the network routing device; wherein, the information carried in the second FlowSpec routing information includes: for matching the source IP address or the DSCP value Flow matching information, a flow specification queue field corresponding to the sub-queue, and an extended community attribute value, where the extended community attribute value is the second rate-limited bandwidth, a bandwidth guarantee value, or a queue type.
  • the routing controller of the network routing device performs a traffic scheduling operation based on an instruction set; wherein, if the extended community attribute value corresponding to the subqueue is the second rate-limited bandwidth, the routing control The sum of the bandwidths of the sub-queues controlled by the controller is less than or equal to the first rate-limited bandwidth of the main queue.
  • a centralized controller comprising: an information configuration module, configured to configure a flow specification queue field based on main queue or sub-queue information of a service flow, and The execution action corresponding to the queue sets the extended community attribute value; the route generation module is used to generate FlowSpec routing information, and add flow matching information, the flow specification queue field and the extended community attribute value to the FlowSpec routing information; A route sending module, configured to send the FlowSpec routing information to a network routing device, so that the routing controller of the network routing device performs traffic regulation processing according to the FlowSpec routing information.
  • the information carried in the flow specification queue field includes: queue type information and queue ID information; wherein, the queue type information is used to indicate that the queue is a main queue or a sub-queue, the main queue and its Bundled subqueues have the same queue ID information.
  • the execution action includes: minimum bandwidth guarantee and congestion management; in the case that the execution action represented by the type of the extended community attribute is minimum bandwidth guarantee, the extended community attribute value is a bandwidth guarantee value ; When the execution action represented by the type of the extended community attribute is congestion management, the value of the extended community attribute is the queue type.
  • the executing action further includes: bandwidth rate limiting; in the case that the executing action represented by the type of the extended community attribute is bandwidth rate limiting, the extended community attribute value is a rate limiting bandwidth.
  • the route sending module is configured to establish a BGP FlowSpec neighbor relationship with the network routing device, and send first FlowSpec routing information to the network routing device; wherein the first FlowSpec routing information carries The information includes: flow matching information for matching with the destination IP address, a flow specification queue field corresponding to the main queue, and an extended community attribute value, where the extended community attribute value is the first rate-limited bandwidth.
  • the route sending module is configured to send the second FlowSpec routing information to the network routing device; wherein, the information carried by the second FlowSpec routing information includes: used to communicate with the source IP address or the DSCP value The matching flow matching information, the flow specification queue field corresponding to the sub-queue, and the extended community attribute value, where the extended community attribute value is the second rate-limited bandwidth, the bandwidth guarantee value or the queue type.
  • the routing controller of the network routing device performs a traffic scheduling operation based on an instruction set; wherein, if the extended community attribute value corresponding to the subqueue is the second rate-limited bandwidth, the routing control The sum of the bandwidths of the sub-queues controlled by the controller is less than or equal to the first rate-limited bandwidth of the main queue.
  • a centralized controller comprising: a memory; and a processor coupled to the memory, the processor configured to execute the above based on instructions stored in the memory method described.
  • a computer-readable storage medium storing computer instructions, the instructions being executed by a processor to execute the method as described above.
  • FIG. 1 is a schematic flowchart of some embodiments of a service flow scheduling method according to the present disclosure
  • Fig. 2A is a schematic diagram of the format of Flow-Spec NLRI
  • Fig. 2B is a schematic diagram of the format of FlowSpec-Queue
  • FIG. 3 is a schematic diagram of other embodiments of the service flow scheduling method according to the present disclosure.
  • FIG. 4 is a block diagram of some embodiments of a centralized controller according to the present disclosure.
  • FIG. 5 is a block diagram of other embodiments of the centralized controller according to the present disclosure.
  • the QoS technology can only be applied to the actually existing port (or its sub-interface), which has certain limitations.
  • a technical problem to be solved by the present disclosure is to provide a service flow scheduling method, a centralized controller and a storage medium.
  • the centralized controller can complete the Hierarchical QoS scheduling for flows has higher practicability; use BGP network layer reachable information type to transmit flow filtering information, which has good maintainability; provides rich filtering conditions and processing actions, which can be more targeted to traffic flow control.
  • FIG. 1 is a schematic flowchart of some embodiments of a service flow scheduling method according to the present disclosure, as shown in FIG. 1 :
  • Step 101 the centralized controller configures the flow specification queue field based on the main queue or sub-queue information of the service flow, and sets the extended community attribute value according to the execution action corresponding to the main queue or sub-queue.
  • Step 102 the centralized controller generates FlowSpec routing information, and adds flow matching information, flow specification queue fields and extended community attribute values to the FlowSpec routing information.
  • the flow matching information includes destination IP, destination port, DSCP, fragment type, ICMP code, ICMP type, packet length, source destination port number, protocol number, source IP, source port number, and TCP flag bits Multiple properties in etc. properties.
  • Step 103 the centralized controller sends the FlowSpec routing information to the network routing device, so that the routing controller of the network routing device performs traffic regulation processing according to the FlowSpec routing information.
  • the centralized controller can send the FlowSpec routing information to the network routing device by using various related methods.
  • the routing controller of the network routing device performs corresponding configuration processing according to the FlowSpec routing information, and uses a variety of related methods to perform hierarchical traffic control processing on service traffic packets and queues based on the configuration information.
  • QoS refers to a network's ability to provide better service for a given network communication. For example, when the network is overloaded or congested, QoS can ensure that important traffic is not delayed or dropped, while ensuring the efficient operation of the network.
  • the FlowSpec (Flow Specifications, flow specification) message is used to instruct the network element to match the traffic and control the matched traffic.
  • the BGP FlowSpec (BGP Flow Specifications, BGP Flow Specification, BGP, Border Gateway Protocol, Border Gateway Protocol) message is the NLRI (NetworkLayer Reachability Information, Network Layer Reachability Information) defined by BGP, and the BGP FlowSpec message can transmit flow specification information through NLRI.
  • the service flow scheduling method of the present disclosure improves the BGP FlowSpec protocol, expands the new BGP FlowSpec field, so that it can match the original twelve-tuple (destination IP, destination port, DSCP, fragment type, ICMP code, ICMP type,
  • the main queue/subqueue relationship can also be defined, and a new action for adding the extended community value is added.
  • the new action includes Minimum bandwidth guarantee and congestion management, etc.
  • Corresponding QoS queues can be generated for service traffic, and the queues can be implemented as stacks, maps, or lists. It can be in the form of a main queue and a sub-queue. For example, there can be multiple main queues for a certain customer, and each main queue can be associated with multiple sub-queues. Each sub-queue can correspond to a project group of the customer, and each project group can be has its own dedicated subqueue.
  • the centralized controller defines the BGP FlowSpec traffic classification based on the main queue or sub-queue of the service flow, and transmits the corresponding flow action by means of the extended community value to complete the scheduling method for realizing the QOS of complex service flows.
  • the information carried in the flow specification queue field includes: queue type information and queue ID information; the queue type information is used to indicate that the queue is a main queue or a sub-queue, and the main queue and its bundled sub-queues have the same queue ID information.
  • Actions performed include minimum bandwidth guarantee, congestion management, and the like.
  • the value of the extended community attribute is the bandwidth guarantee value; in the case where the execution action represented by the type of the extended community attribute is congestion management, the value of the extended community attribute is the bandwidth guarantee value. is the queue type.
  • the execution action further includes bandwidth rate limiting; when the execution action represented by the type of the extended community attribute is bandwidth rate limiting, the extended community attribute value is the rate limiting bandwidth.
  • the BGP FlowSpec extension header is newly defined:
  • FlowSpec-Queue occupies one byte to indicate the type and ID of the queue.
  • the specific meanings are as follows:
  • Queue-type occupies one bit. When the value is 0, it means that the queue is a sub-queue; when the value is 1, it means that the queue is the main queue.
  • Queue-ID occupies seven bits. The value is assigned by the centralized controller, the value range (1-127).
  • the main queue and its bundled sub-queues will be assigned the same Queue-ID, that is, the queues with the same Queue-ID.
  • a Queue-type value of 1 indicates that it is the main queue, and a Queue-type value of 0 indicates that it is a sub-queue.
  • the main queue and sub-queue with the same Queue-ID have a binding relationship.
  • Newly defined extended community value The newly added type values are 0x800A and 0x800B, which represent the minimum bandwidth guarantee and congestion management, respectively.
  • the types and encodings of Extended community are shown in Table 1 below:
  • Type 0x800A Minimum bandwidth guarantee allows to set the traffic to fast forwarding to obtain the minimum bandwidth guarantee, encoded as a 6-byte bandwidth guarantee value (unit: Kbit/s).
  • Type 0x800B Congestion management allows traffic to be set to the corresponding queue for packet forwarding through the queue scheduling algorithm, encoded as a 1-byte queue type (the upper five bits are not used, and the lower three bits are from 0 to 7 to represent the queue, respectively BE, AF1, AF2, AF3, AF4, EF, CS6 and CS7).
  • the centralized controller establishes a BGP FlowSpec neighbor relationship with the network routing device, and the centralized controller sends the first FlowSpec routing information to the network routing device; wherein, the information carried in the first FlowSpec routing information includes: The flow matching information that matches the address, the flow specification queue field corresponding to the main queue, and the extended community attribute value, where the extended community attribute value is the first rate-limited bandwidth.
  • the centralized controller sends the second FlowSpec routing information to the network routing device; wherein, the information carried in the second FlowSpec routing information includes: flow matching information used to match the source IP address or DSCP value, and flow specifications corresponding to the subqueues The queue field and the extended community attribute value.
  • the extended community attribute value is the second rate-limited bandwidth, bandwidth guarantee value, or queue type.
  • the routing controller of the network routing device performs traffic scheduling operations based on the instruction set; wherein, if the value of the extended community attribute corresponding to the sub-queue is the second rate-limited bandwidth, the routing controller controls the sum of the bandwidths of the sub-queues to be less than or equal to the main team The first rate-limited bandwidth in the column.
  • the centralized controller establishes BGP FlowSpec neighbors with the network core/aggregation device.
  • the centralized controller delivers the newly defined FlowSpec route to the neighbor to match the source or destination IP address.
  • the newly defined FlowSpec route also carries the extended community attribute to limit the traffic rate of the main queue.
  • the centralized controller delivers a newly defined FlowSpec route to neighbors to match the DSCP value or part of the user's IP address.
  • the newly defined FlowSpec route also carries the extended community attribute to limit the flow rate of subqueues, guarantee the minimum bandwidth or congestion control.
  • the main queue matches the overall traffic of users, and can be matched based on source or destination IP addresses (or can be matched based on any combination of FlowSpec 12-tuple), and execute rate-limit.
  • the sub-queue matches the partial traffic scheduling of the user, which can be identified, matched and classified based on the DSCP value or the partial IP address of the user. Actions can be performed: minimum bandwidth guarantee, congestion control, and rate-limit.
  • the hierarchical QoS scheduling for flows is completed through FlowSpec and the centralized controller.
  • the routing controller parses the hierarchical QOS processing instructions issued by the centralized controller, completes the corresponding traffic processing operations, and describes the scheduling of the corresponding QOS main and sub-queue parameters.
  • the provider edge device PE1 needs to access the customer terminal devices CPE1, CPE2 and CPE3.
  • the centralized controller establishes a BGP FlowSpec neighbor relationship with PE1.
  • the centralized controller delivers the FlowSpec routing information (main queue) to PE1 according to the requirements.
  • the FlowSpec routing information matches the destination addresses of CPE1, CPE2 and CPE3 respectively.
  • the FlowSpec routing information carries the extended community attribute of type 0x8006 and implements the bandwidth of the main queue.
  • Speed limit action the maximum speed limit bandwidth is X.
  • the centralized controller sends FlowSpec routing information (subqueues) to PE1 again according to the requirements.
  • the FlowSpec routing information matches the source IP address (or DSCP value, etc.) Traffic speed limit (or minimum bandwidth guarantee, congestion control, etc.), set the maximum bandwidth of multiple sub-queue speed limit to Y1, Y2, Y3...etc.
  • the traffic is classified by means of simple flow classification or complex flow classification, and the device associates the classified flow with a certain flow control or resource allocation action, provides services in a differentiated manner, and finally Applying the defined HQoS policy to a specific interface achieves the purpose of traffic control; the information for controlling traffic filtering and the routing information for forwarding traffic are mixed together, which is difficult to maintain. It is often necessary to manually modify the traffic filtering policy, and the policy must be applied to Only specific interfaces can take effect, which has certain limitations.
  • the flow is hierarchically classified according to the FlowSpec 12-tuple, and the flow action is defined by the extended community value to achieve the purpose of flow regulation; using BGP network layer reachable information type to transmit flow filtering information, routing information and traffic filtering information exist independently, and the maintainability is good. Provides rich filtering conditions and processing actions to control traffic in a more targeted manner.
  • a centralized controller 40 including: an information configuration module 41 , a route generation module 42 and a route transmission module 43 .
  • the information configuration module 41 configures the flow specification queue field based on the main queue or sub-queue information of the service flow, and sets the extended community attribute value according to the execution action corresponding to the main queue or sub-queue.
  • the route generation module 42 generates FlowSpec routing information, and adds flow matching information, flow specification queue fields and extended community attribute values to the FlowSpec routing information.
  • the route sending module 43 sends the FlowSpec routing information to the network routing device, so that the routing controller of the network routing device performs traffic regulation processing according to the FlowSpec routing information.
  • the route sending module 43 establishes a BGP FlowSpec neighbor relationship with a network routing device, and sends the first FlowSpec routing information to the network routing device; wherein, the information carried in the first FlowSpec routing information includes: used for matching with the destination IP address.
  • the route sending module 43 sends the second FlowSpec routing information to the network routing device; wherein, the information carried in the second FlowSpec routing information includes: flow matching information used to match the source IP address or DSCP value, flow corresponding to the subqueue The canonical queue field and the extended community attribute value, where the extended community attribute value is the second rate-limited bandwidth, bandwidth guarantee value, or queue type.
  • the routing controller of the network routing device performs traffic scheduling operations based on the instruction set; wherein, if the value of the extended community attribute corresponding to the sub-queue is the second rate-limited bandwidth, the routing controller controls the sum of the bandwidths of the sub-queues to be less than or equal to the main team The first rate-limited bandwidth in the column.
  • the apparatus may include a memory 51 , a processor 52 , a communication interface 53 and a bus 54 .
  • the memory 51 is used to store instructions
  • the processor 52 is coupled to the memory 51, and the processor 52 is configured to implement the above-mentioned service flow scheduling method based on the execution of the instructions stored in the memory 51.
  • the memory 51 may be a high-speed RAM memory, a non-volatile memory, or the like, and the memory 51 may also be a memory array.
  • the storage 51 may also be divided into blocks, and the blocks may be combined into virtual volumes according to certain rules.
  • the processor 52 may be a central processing unit (CPU), an application specific integrated circuit (ASIC), or one or more integrated circuits configured to implement the service flow scheduling method of the present disclosure.
  • the present disclosure provides a computer-readable storage medium storing computer instructions that, when executed by a processor, implement the method in any of the above-mentioned embodiments.
  • the centralized controller by extending the fields of the BGP FlowSpec protocol and adding actions corresponding to the extended community value, the centralized controller can complete the hierarchical QoS scheduling for flows, which is more practical.
  • BGP network layer reachable information type is used to transmit flow filtering information, routing information and traffic filtering information exist independently, and maintainability is good; rich filtering conditions and processing actions are provided, and traffic control can be more targeted .
  • embodiments of the present disclosure may be provided as a method, system, or computer program product. Accordingly, the present disclosure may take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present disclosure may take the form of a computer program product embodied on one or more computer-usable non-transitory storage media (including, but not limited to, disk storage, CD-ROM, optical storage, etc.) having computer-usable program code embodied therein .
  • computer-usable non-transitory storage media including, but not limited to, disk storage, CD-ROM, optical storage, etc.
  • These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory result in an article of manufacture comprising instruction means, the instructions
  • the apparatus implements the functions specified in the flow or flow of the flowcharts and/or the block or blocks of the block diagrams.
  • the methods and systems of the present disclosure may be implemented in many ways.
  • the methods and systems of the present disclosure may be implemented in software, hardware, firmware, or any combination of software, hardware, and firmware.
  • the above order of steps for the method is for illustration only, and the steps of the method of the present disclosure are not limited to the order specifically described above unless specifically stated otherwise.
  • the present disclosure can also be implemented as programs recorded in a recording medium, the programs including machine-readable instructions for implementing methods according to the present disclosure.
  • the present disclosure also covers a recording medium storing a program for executing the method according to the present disclosure.

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Abstract

本公开提供了一种业务流调度方法、集中控制器以及存储介质，其中的方法包括：集中控制器基于业务流的主队列或子队列信息配置流规范队列字段，设置扩展团体属性值；集中控制器生成FlowSpec路由信息，并在FlowSpec路由信息中添加流匹配信息、流规范队列字段和扩展团体属性值；集中控制器将FlowSpec路由信息发送给网络路由设备。本公开的方法、集中控制器以及存储介质，通过扩展BGP FlowSpec协议的字段、新增extended community值对应的动作，集中控制器能够完成针对流的层次化QoS调度，实用性更高，能够提供丰富的过滤条件和处理动作，可以更有针对性地实现对流量的控制。

Description

业务流调度方法、集中控制器以及存储介质
相关申请的交叉引用
本公开是以CN申请号为202110216640.6申请日为2021年2月26日的申请为基础，并主张其优先权，该CN申请的公开内容在此作为整体引入本公开中。
技术领域
本公开涉及通信技术领域，尤其涉及一种业务流调度方法、集中控制器以及存储介质。
背景技术
随着互联网的发展，业务流量增长迅猛，网络拥塞问题逐渐严重，导致数据包丢失、时延变高、传输顺序混乱及数据包出错等现象产生，对整个互联网造成了影响，由此出现了QoS(Quality of Service，服务质量)技术。
发明内容
根据本公开的第一方面，提供一种业务流调度方法，包括：集中控制器基于业务流的主队列或子队列信息配置流规范队列字段，并根据与所述主队列或所述子队列相对应的执行动作设置扩展团体属性值；所述集中控制器生成FlowSpec路由信息，并在所述FlowSpec路由信息中添加流匹配信息、所述流规范队列字段和所述扩展团体属性值；所述集中控制器将所述FlowSpec路由信息发送给网络路由设备，以使所述网络路由设备的路由控制器根据所述FlowSpec路由信息进行流量调控处理。
在一些实施例中，所述流规范队列字段携带的信息包括：队列类型信息和队列ID信息；其中，所述队列类型信息用于表征此队列是主队列或子队列，所述主队列和其捆绑的子队列具有相同的队列ID信息。
在一些实施例中，所述执行动作包括：最小带宽保障、拥塞管理；在所述扩展团体属性的类型所表征的执行动作为最小带宽保障的情况下，所述扩展团体属性值为带宽保障值；在所述扩展团体属性的类型所表征的执行动作为拥塞管理的情况下，所述扩展团体属性值为队列类型。
在一些实施例中，所述执行动作还包括：带宽限速；在所述扩展团体属性的类型所表征的执行动作为带宽限速的情况下，所述扩展团体属性值为限速带宽。
在一些实施例中，所述集中控制器与所述网络路由设备建立BGP FlowSpec邻居关系；所述集中控制器向所述网络路由设备发送第一FlowSpec路由信息；其中，所述第一FlowSpec路由信息携带的信息包括：用于与目的IP地址相匹配的流匹配信息、与所述主队列相对应的流规范队列字段和扩展团体属性值，此扩展团体属性值为第一限速带宽。
在一些实施例中，所述集中控制器向所述网络路由设备发送第二FlowSpec路由信息；其中，所述第二FlowSpec路由信息携带的信息包括：用于与源IP地址或DSCP数值相匹配的流匹配信息、与所述子队列相对应的流规范队列字段和扩展团体属性值，此扩展团体属性值为第二限速带宽、带宽保障值或队列类型。
在一些实施例中，所述网络路由设备的路由控制器基于指令集进行流量调度操作；其中，如果与所述子队列相对应的扩展团体属性值为第二限速带宽，则所述路由控制器控制子队列的带宽之和小于或等于主队列的第一限速带宽。
根据本公开的第二方面，提供一种集中控制器，包括：信息配置模块，用于基于业务流的主队列或子队列信息配置流规范队列字段，并根据与所述主队列或所述子队列相对应的执行动作设置扩展团体属性值；路由生成模块，用于生成FlowSpec路由信息，并在所述FlowSpec路由信息中添加流匹配信息、所述流规范队列字段和所述扩展团体属性值；路由发送模块，用于将所述FlowSpec路由信息发送给网络路由设备，以使所述网络路由设备的路由控制器根据所述FlowSpec路由信息进行流量调控处理。
在一些实施例中，所述流规范队列字段携带的信息包括：队列类型信息和队列ID信息；其中，所述队列类型信息用于表征此队列是主队列或子队列，所述主队列和其捆绑的子队列具有相同的队列ID信息。
在一些实施例中，所述执行动作包括：最小带宽保障、拥塞管理；在所述扩展团体属性的类型所表征的执行动作为最小带宽保障的情况下，所述扩展团体属性值为带宽保障值；在所述扩展团体属性的类型所表征的执行动作为拥塞管理的情况下，所述扩展团体属性值为队列类型。
在一些实施例中，所述执行动作还包括：带宽限速；在所述扩展团体属性的类型所表征的执行动作为带宽限速的情况下，所述扩展团体属性值为限速带宽。
在一些实施例中，所述路由发送模块，用于与所述网络路由设备建立BGP FlowSpec邻居关系，向所述网络路由设备发送第一FlowSpec路由信息；其中，所述第一FlowSpec路由信息携带的信息包括：用于与目的IP地址相匹配的流匹配信息、与所述主队列相对应的流规范队列字段和扩展团体属性值，此扩展团体属性值为第一限速带宽。
在一些实施例中，所述路由发送模块，用于向所述网络路由设备发送第二FlowSpec路由信息；其中，所述第二FlowSpec路由信息携带的信息包括：用于与源IP地址或DSCP数值相匹配的流匹配信息、与所述子队列相对应的流规范队列字段和扩展团体属性值，此扩展团体属性值为第二限速带宽、带宽保障值或队列类型。
在一些实施例中，所述网络路由设备的路由控制器基于指令集进行流量调度操作；其中，如果与所述子队列相对应的扩展团体属性值为第二限速带宽，则所述路由控制器控制子队列的带宽之和小于或等于主队列的第一限速带宽。
根据本公开的第三方面，提供一种集中控制器，包括：存储器；以及耦接至所述存储器的处理器，所述处理器被配置为基于存储在所述存储器中的指令，执行如上所述的方法。
根据本公开的第四方面，提供一种计算机可读存储介质，所述计算机可读存储介质存储有计算机指令，所述指令被处理器执行如上所述的方法。
附图说明
为了更清楚地说明本公开实施例或相关技术中的技术方案，下面将对实施例或相关技术描述中所需要使用的附图作一简单地介绍，显而易见地，下面描述中的附图仅仅是本公开的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动性的前提下，还可以根据这些附图获得其他的附图。
图1为根据本公开的业务流调度方法的一些实施例的流程示意图；
图2A为Flow-Spec NLRI的格式示意图；图2B为FlowSpec-Queue的格式示意图；
图3为根据本公开的业务流调度方法的另一些实施例的示意图；
图4为根据本公开的集中控制器的一些实施例的模块示意图；
图5为根据本公开的集中控制器的另一些实施例的模块示意图。
具体实施方式
下面参照附图对本公开进行更全面的描述，其中说明本公开的示例性实施例。下面将结合本公开实施例中的附图，对本公开实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅仅是本公开一部分实施例，而不是全部的实施例。基于本公开中的实施例，本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例，都属于本公开保护的范围。下面结合各个图和实施例对本公开的技术方案进行多方面的描述。
下文中的“第一”、“第二”等，仅用于描述上相区别，并没有其他特殊的含义。
在发明人所知晓的相关技术中，QoS技术只能应用于实际存在的端口(或其子接口)，具有一定的局限性。
有鉴于此，本公开要解决的一个技术问题是提供一种业务流调度方法、集中控制器以及存储介质，通过扩展BGP FlowSpec协议的字段、新增extended community值对应的动作，集中控制器能够完成针对流的层次化QoS调度，实用性更高；使用BGP网络层可达信息类型来传递流过滤信息，可维护性好；提供丰富的过滤条件和处理动作，可以更有针对性地实现对流量的控制。
图1为根据本公开的业务流调度方法的一些实施例的流程示意图，如图1所示：
步骤101，集中控制器基于业务流的主队列或子队列信息配置流规范队列字段，并根据与主队列或子队列相对应的执行动作设置扩展团体属性值。
步骤102，集中控制器生成FlowSpec路由信息，并在FlowSpec路由信息中添加流匹配信息、流规范队列字段和扩展团体属性值。
在一些实施例中，流匹配信息包括目的IP、目的端口、DSCP、分片类型、ICMP code、ICMP type、报文长度、源目端口号、协议号、源IP、源端口号、TCP标志位等属性中的多个属性。
步骤103,集中控制器将FlowSpec路由信息发送给网络路由设备，以使网络路由设备的路由控制器根据FlowSpec路由信息进行流量调控处理。
集中控制器可以采用相关的多种方法将FlowSpec路由信息发送给网络路由设备。网络路由设备的路由控制器根据FlowSpec路由信息进行相应的配置处理，基于配置信息并使用多种相关的方法对业务流量包以及队列进行层次化的流量调控处理。
在一些实施例中，QoS指一个网络能够为指定的网络通信提供更好的服务能力。例如，当网络过载或拥塞时，QoS能够确保重要业务量不受延迟或丢弃，同时保证网络的高效运行。FlowSpec(Flow Specifications，流规范)消息用于指示网元对流量进行匹配，并对匹配出的流量进行控制。BGP FlowSpec(BGP Flow Specifications，BGP流规范，BGP，Border Gateway Protocol，边界网关协议)消息为BGP定义的NLRI(NetworkLayer Reachability Information，网络层可达信息)，BGP FlowSpec消息可以通过NLRI传递流规范信息。
本公开的业务流调度方法改进了BGP FlowSpec协议，扩展了新的BGP FlowSpec字段，使其可以匹配原来的十二元组(目的IP、目的端口、DSCP、分片类型、ICMP code、ICMP type、报文长度、源目端口号、协议号、源IP、源端口号、TCP标志位)之外，还可定义主队列 /子队列关系，并且，新增extended community值的新动作，新动作包括最小带宽保障及拥塞管理等。
对于业务流量可以生成对应的QoS队列，该队列可以实现为栈、Map、或List等。可以采用主队列和子队列的形式，例如，对于某个客户可以存在多个主队列，每个主队列下又可以关联有多个子队列，每个子队列可以对应客户的一个项目组，各个项目组分别具有其专有的子队列。集中控制器通过基于业务流量的主队列或子队列的BGP FlowSpec流量分类定义，并通过extended community值的方式传递相应流动作，完成实现复杂业务流QOS的调度方法。
在一些实施例中，流规范队列字段携带的信息包括：队列类型信息和队列ID信息；队列类型信息用于表征此队列是主队列或子队列，主队列和其捆绑的子队列具有相同的队列ID信息。
执行动作包括最小带宽保障、拥塞管理等。在扩展团体属性的类型所表征的执行动作为最小带宽保障的情况下，扩展团体属性值为带宽保障值；在扩展团体属性的类型所表征的执行动作为拥塞管理的情况下，扩展团体属性值为队列类型。执行动作还包括带宽限速；在扩展团体属性的类型所表征的执行动作为带宽限速的情况下，扩展团体属性值为限速带宽。
在一些实施例中，新定义了BGP FlowSpec扩展头：
1、新定义flow-spec NLRI结构：在相关的flow-spec NLRI结构基础上，在报文头部新增一个FlowSpec-queue字段(流规范队列字段)，用以匹配12元组及区分主队列、子队列，如图2A所示。
FlowSpec-Queue字段的格式如图2B所示：FlowSpec-Queue占一个字节，用以表示该队列的类型及ID，具体含义如下：
Queue-type：占一个比特。当值为0时，表示该队列为子队列；当值为1时，表示该队列为主队列。
Queue-ID：占七个比特。由集中控制器分配取值，取值范围(1-127)。
主队列及其捆绑的子队列会分配同一个Queue-ID，即Queue-ID相同的队列，Queue-type值为1的表示是主队列，Queue-type值为0的表示是子队列。Queue-ID相同的主队列和子队列之间具有捆绑关系。
2、新定义extended community值：新增的type值为0x800A和0x800B，分别表示最小带宽保障及拥塞管理。Extended community的类型和编码如下表1所示：
Figure PCTCN2021133449-appb-000001
表1-Extended community的类型和编码表
如表1所示，Type为0x8006到0x8009的扩展团体属性在RFC5575文档中已经定义。type 0x800A：最小带宽保障允许将流量设置为快速转发以便获取最小带宽保障，编码为6字节的带宽保障值(单位：Kbit/s)。Type 0x800B：拥塞管理允许将流量设置为相应的队列以便通过队列调度算法进行报文转发，编码为1字节的队列类型(高五位不使用，低三位的值从0到7分别表示队列为BE、AF1、AF2、AF3、AF4、EF、CS6和CS7)。
在一些实施例中，集中控制器与网络路由设备建立BGP FlowSpec邻居关系，集中控制器向网络路由设备发送第一FlowSpec路由信息；其中，第一FlowSpec路由信息携带的信息包括：用于与目的IP地址相匹配的流匹配信息、与主队列相对应的流规范队列字段和扩展团体属性值，此扩展团体属性值为第一限速带宽。
集中控制器向网络路由设备发送第二FlowSpec路由信息；其中，第二FlowSpec路由信息携带的信息包括：用于与源IP地址或DSCP数值相匹配的流匹配信息、与子队列相对应的流规范队列字段和扩展团体属性值，此扩展团体属性值为第二限速带宽、带宽保障值或队列类型。
网络路由设备的路由控制器基于指令集进行流量调度操作；其中，如果与子队列相对应的扩展团体属性值为第二限速带宽，则路由控制器控制子队列的带宽之和小于或等于主队列的第一限速带宽。
在一些实施例中，集中控制器与网络核心/汇聚设备建立BGP FlowSpec邻居。对于主队列：集中控制器向邻居下发新定义的FlowSpec路由，用以匹配源或目的IP地址，新定义的FlowSpec路由同时携带扩展团体属性，进行主队列流量限速。对于子队列：集中控制器向邻居下发新定义的FlowSpec路由，用以匹配DSCP数值或者用户部分IP地址，新定义的FlowSpec路由同时携带扩展团体属性，进行子队列流量限速、最小带宽保障或拥 塞控制。
基于业务流量主/子队列的BGP FlowSpec流量分类定义及处理：主队列匹配用户的总体流量，可基于源或目的IP地址匹配(也可基于FlowSpec 12元组的任意组合方式进行匹配)，并执行限速rate-limit。子队列匹配用户部分流量调度，可以基于DSCP数值或者用户的部分IP地址进行识别匹配分类，可执行动作：最小bandwidth保障，拥塞控制，限速rate-limit。
通过FlowSpec及集中控制器完成针对流的层次化QoS调度，路由控制器解析集中控制器下发的层次化QOS处理指令，完成对应的流量处理操作，说明对应QOS主子队列参数的调度情况。
如图3所示，提供商边缘设备PE1需要访问客户终端设备CPE1、CPE2与CPE3。集中控制器与PE1建立BGP FlowSpec邻居关系。集中控制器根据需求，向PE1下发FlowSpec路由信息(主队列)，FlowSpec路由信息分别匹配CPE1、CPE2与CPE3的目的地址，同时该FlowSpec路由信息携带扩展团体属性的type为0x8006，执行主队列带宽限速动作，限速带宽最高为X。
集中控制器再次根据需求，向PE1下发FlowSpec路由信息(子队列)，FlowSpec路由信息分别匹配源IP地址(或DSCP值等)，同时FlowSpec路由信息携带扩展团体属性的type为0x8006，进行子队列流量限速(或最小带宽保障、拥塞控制等)，分别将多条子队列限速最高带宽设置为Y1、Y2、Y3…等。
PE1收到集中控制器发送的FlowSpec路由后，PE1中的路由器流量管理芯片(路由控制器)根据路由内容执行相应的指令集，完成对应的流量操作：子队列带宽之和必须小于等于主队列限速带宽，即Y1+Y2+Y3+…<＝X。
在相关技术的业务流调度方法中，通过简单流分类或复杂流分类等方式将流量分类，设备将分类后的流量与某种流量控制或资源分配动作相关联，有区别地提供服务，最后再将已定义好的HQoS策略应用于具体接口上达到流量调控的目的；控制流量过滤的信息和转发流量的路由信息混合在一起，维护工作难度大，经常需要手工修改流量过滤策略，策略必须应用于具体接口才可以生效，具有一定的局限性。
在本公开的业务流调度方法中，通过新增BGP FlowSpec TLV字段以及extended community值，根据FlowSpec 12元组对流量进行层次化分类，并通过extended community值定义流动作，达到流量调控的目的；使用BGP网络层可达信息类型来传递流过滤信息，路由信息和流量过滤信息独立存在，可维护性好。提供丰富的过滤条件和处理动作，可以 更有针对性地实现对流量的控制。
在一些实施例中，根据本公开提供一种集中控制器40，包括：信息配置模块41、路由生成模块42和路由发送模块43。信息配置模块41基于业务流的主队列或子队列信息配置流规范队列字段，并根据与主队列或子队列相对应的执行动作设置扩展团体属性值。路由生成模块42生成FlowSpec路由信息，并在FlowSpec路由信息中添加流匹配信息、流规范队列字段和扩展团体属性值。路由发送模块43将FlowSpec路由信息发送给网络路由设备，以使网络路由设备的路由控制器根据FlowSpec路由信息进行流量调控处理。
在一些实施例中，路由发送模块43与网络路由设备建立BGP FlowSpec邻居关系，向网络路由设备发送第一FlowSpec路由信息；其中，第一FlowSpec路由信息携带的信息包括：用于与目的IP地址相匹配的流匹配信息、与主队列相对应的流规范队列字段和扩展团体属性值，此扩展团体属性值为第一限速带宽。
路由发送模块43向网络路由设备发送第二FlowSpec路由信息；其中，第二FlowSpec路由信息携带的信息包括：用于与源IP地址或DSCP数值相匹配的流匹配信息、与子队列相对应的流规范队列字段和扩展团体属性值，此扩展团体属性值为第二限速带宽、带宽保障值或队列类型。
网络路由设备的路由控制器基于指令集进行流量调度操作；其中，如果与子队列相对应的扩展团体属性值为第二限速带宽，则路由控制器控制子队列的带宽之和小于或等于主队列的第一限速带宽。
图5为根据本公开的集中控制器的又一些实施例的模块示意图。如图5所示，该装置可包括存储器51、处理器52、通信接口53以及总线54。存储器51用于存储指令，处理器52耦合到存储器51，处理器52被配置为基于存储器51存储的指令执行实现上述的业务流调度方法。
存储器51可以为高速RAM存储器、非易失性存储器(non-volatile memory)等，存储器51也可以是存储器阵列。存储器51还可能被分块，并且块可按一定的规则组合成虚拟卷。处理器52可以为中央处理器CPU，或专用集成电路ASIC(Application Specific Integrated Circuit)，或者是被配置成实施本公开的业务流调度方法的一个或多个集成电路。
在一些实施例中，本公开提供一种计算机可读存储介质，计算机可读存储介质存储有计算机指令，指令被处理器执行时实现如上任一些实施例中的方法。
上述实施例中的业务流调度方法、集中控制器以及存储介质，通过扩展BGP FlowSpec 协议的字段、新增extended community值对应的动作，集中控制器能够完成针对流的层次化QoS调度，实用性更高；使用BGP网络层可达信息类型来传递流过滤信息，路由信息和流量过滤信息独立存在，可维护性好；提供丰富的过滤条件和处理动作，可以更有针对性地实现对流量的控制。
本领域内的技术人员应当明白，本公开的实施例可提供为方法、系统、或计算机程序产品。因此，本公开可采用完全硬件实施例、完全软件实施例、或结合软件和硬件方面的实施例的形式。而且，本公开可采用在一个或多个其中包含有计算机可用程序代码的计算机可用非瞬时性存储介质(包括但不限于磁盘存储器、CD-ROM、光学存储器等)上实施的计算机程序产品的形式。
本公开是参照根据本公开实施例的方法、设备(系统)和计算机程序产品的流程图和/或方框图来描述的。应理解可由计算机程序指令实现流程图和/或方框图中的每一流程和/或方框以及流程图和/或方框图中的流程和/或方框的结合。可提供这些计算机程序指令到通用计算机、专用计算机、嵌入式处理机或其他可编程数据处理设备的处理器以产生一个机器，使得通过计算机或其他可编程数据处理设备的处理器执行的指令产生用于实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能的装置。
这些计算机程序指令也可存储在能引导计算机或其他可编程数据处理设备以特定方式工作的计算机可读存储器中，使得存储在该计算机可读存储器中的指令产生包括指令装置的制造品，该指令装置实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能。
可能以许多方式来实现本公开的方法和系统。例如，可通过软件、硬件、固件或者软件、硬件、固件的任何组合来实现本公开的方法和系统。用于方法的步骤的上述顺序仅是为了进行说明，本公开的方法的步骤不限于以上具体描述的顺序，除非以其它方式特别说明。此外，在一些实施例中，还可将本公开实施为记录在记录介质中的程序，这些程序包括用于实现根据本公开的方法的机器可读指令。因而，本公开还覆盖存储用于执行根据本公开的方法的程序的记录介质。
本公开的描述是为了示例和描述起见而给出的，而并不是无遗漏的或者将本公开限于所公开的形式。很多修改和变化对于本领域的普通技术人员而言是显然的。选择和描述实施例是为了更好说明本公开的原理和实际应用，并且使本领域的普通技术人员能够理解本公开从而设计适于特定用途的带有各种修改的各种实施例。

Claims (16)

  1. 一种业务流调度方法，包括：
    集中控制器基于业务流的主队列或子队列信息配置流规范队列字段，并根据与所述主队列或所述子队列相对应的执行动作设置扩展团体属性值；
    所述集中控制器生成FlowSpec路由信息，并在所述FlowSpec路由信息中添加流匹配信息、所述流规范队列字段和所述扩展团体属性值；
    所述集中控制器将所述FlowSpec路由信息发送给网络路由设备，以使所述网络路由设备的路由控制器根据所述FlowSpec路由信息进行流量调控处理。
  2. 如权利要求1所述的方法，其中，
    所述流规范队列字段携带的信息包括：队列类型信息和队列ID信息；
    其中，所述队列类型信息用于表征此队列是主队列或子队列，所述主队列和其捆绑的子队列具有相同的队列ID信息。
  3. 如权利要求2所述的方法，其中，所述执行动作包括：最小带宽保障、拥塞管理；
    在所述扩展团体属性的类型所表征的执行动作为最小带宽保障的情况下，所述扩展团体属性值为带宽保障值；
    在所述扩展团体属性的类型所表征的执行动作为拥塞管理的情况下，所述扩展团体属性值为队列类型。
  4. 如权利要求2或3所述的方法，其中，所述执行动作还包括：带宽限速；
    在所述扩展团体属性的类型所表征的执行动作为带宽限速的情况下，所述扩展团体属性值为限速带宽。
  5. 如权利要求4所述的方法，还包括：
    所述集中控制器与所述网络路由设备建立BGP FlowSpec邻居关系；
    所述集中控制器向所述网络路由设备发送第一FlowSpec路由信息；
    其中，所述第一FlowSpec路由信息携带的信息包括：用于与目的IP地址相匹配的流匹配信息、与所述主队列相对应的流规范队列字段和扩展团体属性值，此扩展团体属性值为第一限速带宽。
  6. 如权利要求5所述的方法，还包括：
    所述集中控制器向所述网络路由设备发送第二FlowSpec路由信息；
    其中，所述第二FlowSpec路由信息携带的信息包括：用于与源IP地址或DSCP数值 相匹配的流匹配信息、与所述子队列相对应的流规范队列字段和扩展团体属性值，此扩展团体属性值为第二限速带宽、带宽保障值或队列类型。
  7. 如权利要求6所述的方法，其中，
    所述网络路由设备的路由控制器基于指令集进行流量调度操作；
    其中，如果与所述子队列相对应的扩展团体属性值为第二限速带宽，则所述路由控制器控制子队列的带宽之和小于或等于主队列的第一限速带宽。
  8. 一种集中控制器，包括：
    信息配置模块，用于基于业务流的主队列或子队列信息配置流规范队列字段，并根据与所述主队列或所述子队列相对应的执行动作设置扩展团体属性值；
    路由生成模块，用于生成FlowSpec路由信息，并在所述FlowSpec路由信息中添加流匹配信息、所述流规范队列字段和所述扩展团体属性值；
    路由发送模块，用于将所述FlowSpec路由信息发送给网络路由设备，以使所述网络路由设备的路由控制器根据所述FlowSpec路由信息进行流量调控处理。
  9. 如权利要求8所述的集中控制器，其中，
    所述流规范队列字段携带的信息包括：队列类型信息和队列ID信息；
    其中，所述队列类型信息用于表征此队列是主队列或子队列，所述主队列和其捆绑的子队列具有相同的队列ID信息。
  10. 如权利要求9所述的集中控制器，其中，所述执行动作包括：最小带宽保障、拥塞管理；
    在所述扩展团体属性的类型所表征的执行动作为最小带宽保障的情况下，所述扩展团体属性值为带宽保障值；
    在所述扩展团体属性的类型所表征的执行动作为拥塞管理的情况下，所述扩展团体属性值为队列类型。
  11. 如权利要求9或10所述的集中控制器，其中，所述执行动作还包括：带宽限速；
    在所述扩展团体属性的类型所表征的执行动作为带宽限速的情况下，所述扩展团体属性值为限速带宽。
  12. 如权利要求11所述的集中控制器，其中，
    所述路由发送模块，用于与所述网络路由设备建立BGP FlowSpec邻居关系，向所述网络路由设备发送第一FlowSpec路由信息；
    其中，所述第一FlowSpec路由信息携带的信息包括：用于与目的IP地址相匹配的流 匹配信息、与所述主队列相对应的流规范队列字段和扩展团体属性值，此扩展团体属性值为第一限速带宽。
  13. 如权利要求12所述的集中控制器，其中，
    所述路由发送模块，用于向所述网络路由设备发送第二FlowSpec路由信息；其中，所述第二FlowSpec路由信息携带的信息包括：用于与源IP地址或DSCP数值相匹配的流匹配信息、与所述子队列相对应的流规范队列字段和扩展团体属性值，此扩展团体属性值为第二限速带宽、带宽保障值或队列类型。
  14. 如权利要求13所述的集中控制器，其中，
    所述网络路由设备的路由控制器基于指令集进行流量调度操作；其中，如果与所述子队列相对应的扩展团体属性值为第二限速带宽，则所述路由控制器控制子队列的带宽之和小于或等于主队列的第一限速带宽。
  15. 一种集中控制器，包括：
    存储器；以及耦接至所述存储器的处理器，所述处理器被配置为基于存储在所述存储器中的指令，执行如权利要求1至7中任一项所述的方法。
  16. 一种计算机可读存储介质，所述计算机可读存储介质存储有计算机指令，所述指令被处理器执行如权利要求1至7中任一项所述的方法。
PCT/CN2021/133449 2021-02-26 2021-11-26 业务流调度方法、集中控制器以及存储介质 WO2022179224A1 (zh)

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CN106921572A (zh) * 2015-12-24 2017-07-04 华为技术有限公司 一种传播QoS策略的方法、装置及系统
CN107222449A (zh) * 2016-03-21 2017-09-29 华为技术有限公司 基于流规则协议的通信方法、设备和系统
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CN108270690A (zh) * 2016-12-30 2018-07-10 北京华为数字技术有限公司 控制报文流量的方法和装置

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