WO2009000196A1 - Procédé et dispositif destinés à la convergence d'un chemin - Google Patents

Procédé et dispositif destinés à la convergence d'un chemin Download PDF

Info

Publication number
WO2009000196A1
WO2009000196A1 PCT/CN2008/071398 CN2008071398W WO2009000196A1 WO 2009000196 A1 WO2009000196 A1 WO 2009000196A1 CN 2008071398 W CN2008071398 W CN 2008071398W WO 2009000196 A1 WO2009000196 A1 WO 2009000196A1
Authority
WO
WIPO (PCT)
Prior art keywords
route
priority
traffic
convergence
preset
Prior art date
Application number
PCT/CN2008/071398
Other languages
English (en)
Chinese (zh)
Inventor
Yi Li
Original Assignee
Huawei Technologies Co., Ltd.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Huawei Technologies Co., Ltd. filed Critical Huawei Technologies Co., Ltd.
Publication of WO2009000196A1 publication Critical patent/WO2009000196A1/fr

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L45/00—Routing or path finding of packets in data switching networks
    • H04L45/02—Topology update or discovery

Definitions

  • the present invention relates to the field of communications, and in particular, to a route convergence method and device.
  • the generalized concept of network convergence refers to all routes in the routing table and FIB (Forwarding Information Base).
  • the process of updating the status is completed in the table. Therefore, the convergence time should include the fault detection time, the convergence time of the routing layer, and the time when the routing table information is sent to the FIB table. That is to say, the convergence speed depends on the fault detection process, the route calculation and update process, and the process of routing table information to the FIB table. Therefore, improving the convergence performance of the route is usually achieved by optimizing the above three processes.
  • the prior art has the following three convergence methods:
  • the control layer protocol is used to support the fast fault detection, and the medium and the protocol layer are detected in real time, and the fault detection time required for the route convergence is minimized, such as BFD (Bidirectional Forwarding Detection).
  • BFD Bidirectional Forwarding Detection
  • This method only optimizes the fault detection process.
  • the scale of the existing network route prefix is increasing, and the fault detection time required for route convergence can be limited.
  • the optimization effect achieved by this technology is difficult to be achieved and the scale of the route prefix is increased. The proportion increases.
  • route calculation including real-time flooding of IGP (Interior Gateway Protocol), ie flooding, post-calculation; incremental SPF (shortest path first) calculation (i_SPF), ie in SPF tree A tree trunk changes (down/up), only some trees affected by the changed trunk are calculated, and no complete rerouting calculation is required.
  • Local route calculation PRC, Partial Route Calculation: In the SPF tree, if only leaves occur For changes, only the leaf portion is calculated, and there is no need to completely recalculate the route.
  • the main method is to optimize the generation of routing update packets, such as BGP (Border Gateway Protocol) packet queue optimization and dynamic update peer group.
  • BGP Border Gateway Protocol
  • the third type Optimize the speed of the FIB table. After improving the route level convergence from the perspective of hardware and software
  • the embodiment of the present invention provides a route convergence method and device.
  • the technical solution is as follows:
  • a route convergence method includes:
  • the routing table and forwarding information base are updated in the order of priority of each route from high to low.
  • the embodiment of the invention further provides a route convergence device, where the device includes:
  • a priority acquisition module configured to pre-acquire the priority of each route
  • the routing processing module is configured to perform status update on the routing table and the forwarding information base in descending order of priority of each route in the obtaining module.
  • FIG. 1 is a flowchart of a route convergence method according to Embodiment 1 of the present invention.
  • FIG. 2 is a flowchart of a route convergence method according to Embodiment 2 of the present invention.
  • FIG. 3 is a schematic diagram of a route convergence device according to Embodiment 4 of the present invention.
  • FIG. 4 is a schematic diagram of a route convergence device according to Embodiment 5 of the present invention.
  • FIG. 5 is a schematic diagram of a route convergence device according to Embodiment 6 of the present invention. detailed description
  • the priority of each route is obtained first, and when the route is convergence, the routing table and the forwarding information base are updated according to the priority of each route from high to low.
  • Example 1
  • this embodiment provides a route convergence method.
  • the method establishes a priority convergence table based on the collected traffic, and performs corresponding to the routing table and the forwarding information base according to the priority convergence table when the convergence event occurs. Processing. Specifically include:
  • the router forwards the data packet during the statistical period, it collects the data packet and extracts the attributes of the data packet.
  • the preset condition here may be a source address, a ToS (Type of Service) of the IPv4 packet header, or other attribute fields of the data packet except the destination prefix, such as a Vlan Tag in the Layer 2 header. , can also be used as the basis for statistical traffic.
  • a field that can be used as an ACL (Access Control List) filtering rule can be used as a preset condition, including Layer 2 header, Layer 3 header, and TCP (Transmission Control Protocol) header, UDP (User Datagram Protocol (User Datagram Protocol) header, such as Ethernet frame header based filtering, time period, protocol, source address and source port, ICMP (Internet Control Message Protocol) type and encoding, IP precedence, ToS value, whether to slice, etc.
  • the records in this embodiment are selectively recorded, and the received data packets can also be recorded according to actual needs.
  • the statistical period of the network is from January 10, 2007 to January 16, 2007, a total of 7 days, the default condition is the source address is 192. 168. 10. 0 to 192. 168. 10. 50 address segment Inside.
  • each time the router receives a forwarding packet it will extract the destination address in the IP header in the packet, obtain the destination route prefix, and then check whether the source address of the packet satisfies at 192.168. 10. 0 to 192. 168. 10. In paragraph 50, if it is satisfied, record it, otherwise it will not be recorded.
  • the preset condition may also be a certain attribute defined by the user according to the requirement, and the attribute is used as a filtering condition,
  • the collected data packets are selectively recorded.
  • the granularity of the recording time period can be determined by the user according to the actual situation of the network.
  • the record information includes: destination route prefix, eligible traffic within the T1 time period, eligible traffic within the T2 time period, eligible traffic within the T3 time period, ....
  • the above-mentioned network establishes a statistical model that predicts the distribution pattern of the daily “forwarding period, destination route prefix, traffic> ternary group within 60 days.
  • a convergence priority table is established by using the amount of traffic forwarded in a certain period of time as a weight.
  • the priority of each route can be determined as follows: Based on the amount of traffic forwarded during a certain period of time, that is, a given time period t before the convergence event occurs.
  • the destination route prefix set with the forwarding traffic greater than the given threshold M the destination route prefix with the larger forwarding traffic has a higher priority; the forwarding traffic is smaller than the destination routing prefix set of the given threshold M, and is given in the statistical model.
  • the destination route prefix with a large forwarding traffic in a given time period has a higher priority.
  • the significance of the sum threshold M is to determine the instantaneous traffic and expected traffic of the route to be converged. If the time point at which the convergence event occurs is the origin 0, the convergence completion time is ⁇ , and ⁇ > ⁇ , the expected traffic can be considered to fall in the time zone [-to, t. Outside, but falling within the time interval [t. , the traffic inside.
  • the route prefix of an entry is in the time period t before the convergence event occurs. If there is a forwarding traffic exceeding the threshold M, the route prefix of the entry may be considered to have an immediate traffic that has a great impact on the convergence performance and urgently needs emergency convergence. The traffic will continue after the convergence event occurs.
  • the route prefix of an entry is in the time period t before the convergence event occurs. If the forwarding traffic of the entry does not reach the threshold M, the instantaneous traffic of the route prefix of the entry does not have a sufficient impact on the convergence performance, but the expected traffic of the destination route prefix may be converged after the convergence event occurs. Urgency needs to be determined using a flow statistics model. If the time point at which the convergence event begins to occur is the origin, the convergence completion time is ⁇ , and ⁇ . , then the expected traffic can be considered It is in the time interval [_t. , t. Outside, but falling within the time interval [t. The traffic inside , that is, this part of the traffic will be affected by the convergence completion time.
  • the time period t It can be a time period that the user customizes as needed, and ⁇ is a pre-estimated time.
  • the traffic of a network for 300 consecutive days is counted.
  • the statistics show that the traffic of a certain part of the destination route prefix has a stable characteristic in the morning from 8:30 to 9:30, assuming that most users who use the network are in the network.
  • 9: 00 started working, so data traffic surged from 9: 00.
  • you set the time interval [_t. , t. t in . Take 30 seconds, ⁇ take 60 seconds. Assume that the convergence time occurs at 8:59: 00.
  • the instantaneous traffic in 30 seconds is small, according to the traffic statistics model, it can be determined that the part of the route prefix has a large impact on the expected traffic after 60 seconds. , then set the destination route prefix of this part at 9: 00.
  • the priority traffic of the traffic is higher.
  • the priority weights of the instant traffic and the expected traffic can be determined using a traffic statistics model to distinguish between the instantaneous traffic and the expected traffic time period t.
  • the threshold M can be determined by the user in combination with the actual situation of the network. Examples are as follows:
  • the mapped priority is: NN 2 > N 3 > N 4 .
  • the routing table of the control plane and the FIB table of the forwarding plane are processed according to the priorities of the routes in the convergence priority table.
  • the routing table and the forwarding information base are composed of one route and the attributes associated with the route.
  • a route and an associated attribute can be regarded as one entry, and the routing table is processed, which is actually processing the routing table or the FIB. Entry.
  • the processing includes route calculation of the routing table, route iteration, IGP flooding, processing of the BGP update message queue, and the like, and update of the FIB table.
  • the convergence priority table is scanned to determine the processing order of the routes affected by the convergence event, and the route with the highest priority is delivered by the priority organization.
  • this embodiment provides another route convergence method.
  • the method establishes a priority convergence table based on the collected traffic and traffic types, and performs corresponding route convergence. Specifically include the following:
  • the router forwards the data packet during the statistical period, the data packet is collected, and the attributes of the data packet are extracted.
  • the traffic destined for the destination of 10.0.0.1 has a total of 1000M.
  • the 1000M traffic is classified according to preset conditions.
  • the service type is classified into three types: video service and voice.
  • Business and data services At the same time, the weights of the three types of traffic correspond to 2, 1.5 and 1, respectively.
  • the convergence table is processed according to the convergence table and the FIB table of the forwarding plane of the control plane involved in the convergence.
  • traffic can also be divided into two categories: Guaranteed Service AF and Best-effort Service BE, which sets the weight of the Guaranteed Service AF to 3 times the best-effort service BE.
  • the traffic destined for prefix 1 is 100M
  • the traffic destined for prefix 2 is 120M.
  • 80M of the prefix 1 belongs to the guaranteed service AF
  • 20M belongs to the best effort service BE
  • 20M of the prefix 2 belongs to Guaranteed service AF
  • 100M belongs to best effort service BE.
  • the weighted traffic value is greater than the forwarding to prefix 2.
  • the real-time traffic and the expected traffic are divided, and weighted again to obtain a convergence priority table.
  • the routes corresponding to prefix 1 and prefix 2 are processed according to the priority of the convergence priority table.
  • This embodiment can also classify traffic according to the user to which it belongs. For example, traffic is divided into three categories according to the user to which the source address of the packet belongs: Important User 4, Important User B, and General User. Set the weight of important user A to 3, important user B The weight of the user is 2, and the weight of the general user is 1.
  • the traffic that is forwarded to the prefix 1 and the prefix 2 is the same as 1000M, and the proportion of the traffic of the prefix 1 according to the foregoing classification is: important user A is 500M, important user B is 300M, and general user is 200M; The proportion of traffic in 2 according to the foregoing classification is: important user A200M, important user B100M, general user 700M.
  • the above embodiment can maintain the statistical model and the convergence priority table in a static and dynamic manner.
  • Convergence Priority The update of the table can be either dynamic by statistical model or statically maintained by the user as needed.
  • the meaning of static maintenance of users is as follows:
  • the traffic statistics model of Embodiment 1 and Embodiment 2 is established according to the collected data packet traffic.
  • the established traffic statistics model can also be obtained directly from other network environments.
  • the priority of the route is known.
  • the above method sets the priority order of different routes according to the data in the network collected for a period of time.
  • the priority is used as the basis for processing, which improves the convergence performance of the route and ensures that the services of important traffic are not lost.
  • the data packets can be directly classified into different types according to the experience, and a priority weight is preset for each type; the destination route prefix corresponding to each type of data packet is set according to each type of priority weight. Priority; and then get the priority of each route.
  • this embodiment provides a route convergence device, including:
  • the priority obtaining module 301 is configured to obtain a priority of each route in advance
  • the routing processing module 302 is configured to perform status update on the routing table and the forwarding information base according to the priority of each route in the priority obtaining module 301 from highest to lowest.
  • the priority obtaining module 301 specifically includes:
  • the collecting unit 301a is configured to collect the traffic of the data packet in the preset statistical period in the network
  • the statistic unit 301b is configured to perform statistics on the traffic of the data packet collected by the collection unit 301a.
  • a statistical model construction unit 301c configured to establish a traffic statistical model of each destination route prefix according to the result of the statistics unit 301b;
  • the priority establishing unit 301d is configured to set a priority convergence table of the instantaneous traffic and the expected traffic of each route according to the traffic statistics model in the statistical model construction unit 301c, and determine the priority of each route according to the priority convergence table.
  • the device further includes: a priority update module 303, configured to notify the priority obtaining module 301 to re-acquire each time interval The priority of the routes.
  • the priority sequence of different routes is set by collecting data in the network for a period of time.
  • the priority is used as the basis for processing, which improves the convergence performance of the route and ensures that the services of the important traffic are not lost.
  • this embodiment provides another route convergence device, including:
  • a priority obtaining module 401 configured to obtain a priority of each route in advance
  • the routing processing module 402 is configured to perform status update on the routing table and the forwarding information base in descending order of priority of each route in the obtaining module 401.
  • the priority obtaining module 401 specifically includes:
  • the collecting unit 401a is configured to collect the traffic of the data packet in the preset statistical period in the network
  • the weighted traffic calculation unit 401b is configured to calculate a weighted traffic corresponding to the path prefix of each 0 according to the preset weight corresponding to the type of the data packet and the traffic collected by the collection module 401a;
  • the statistical model construction unit 401c is configured to establish a traffic statistical model of the route according to the weighted traffic calculated by the weighted traffic calculation unit 401b, where the traffic statistics model includes: a destination route prefix, a forwarding period, and a weighted traffic;
  • the priority establishing unit 401d is configured to set a priority convergence table of the instantaneous traffic and the expected traffic of each destination route prefix according to the traffic statistics model in the statistical model construction unit 401c, and determine the priority of each route according to the convergence table. .
  • the device further includes: a priority update module 403, configured to notify the priority obtaining module 401 to re-acquire each time interval. The priority of the routes.
  • the priority sequence of different routes is set by collecting data in the network for a period of time.
  • the priority is used as the basis for processing, which improves the convergence performance of the route and ensures that the services of the important traffic are not lost.
  • this embodiment provides another route convergence device, including:
  • the priority obtaining module 501 is configured to obtain a priority of each route in advance;
  • the routing processing module 502 is configured to perform status update on the routing table and the forwarding information base in descending order of priority of each route in the obtaining module 501.
  • the priority obtaining module 501 specifically includes:
  • the weight preset unit 501a is configured to divide the data packet into different types according to attributes, and preset a priority weight for each type;
  • the traffic model obtaining unit 501b is configured to import the traffic statistics model acquired in the other network environment into the target system.
  • the priority setting unit 501c is configured to set each class according to the priority weight preset in the weight preset unit 501a.
  • the weight of the traffic corresponding to the data packet, and the priority convergence table is constructed according to the traffic statistics model of the traffic model obtaining unit 501b, and the priority of each route is obtained.
  • the device further includes: a priority update module 503, configured to notify the priority obtaining module 501 to re-acquire each time interval. The priority of the routes.
  • the processing is performed based on the priority, which improves the convergence performance of the route and ensures that the service of the important traffic is not lost.
  • the route convergence device when the route converges, processes the priority order of the different routes acquired by the priority acquisition module, and the processing module performs processing, thereby improving the convergence performance of the route and the service of ensuring important traffic. Not subject to loss. All or part of the above steps may be controlled by an instruction to control the corresponding hardware, and the instructions may be stored in a storage medium such as a hard disk or a memory of a computer or server.
  • a storage medium such as a hard disk or a memory of a computer or server.

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Data Exchanges In Wide-Area Networks (AREA)

Abstract

L'invention concerne un procédé et un dispositif destinés à la convergence d'un chemin dans un domaine de communication. Ledit procédé consiste à : obtenir à l'avance la priorité de chaque chemin; mettre à jour la table de chemin et transmettre une base de données d'informations d'une priorité élevée à une priorité faible pour chaque chemin. Ledit dispositif comprend : un module d'obtention de priorité, qui est utilisé pour obtenir la priorité de chaque chemin; un module de traitement de chemin, qui est utilisé pour traiter un chemin d'une priorité élevée à une priorité faible. En définissant une priorité différente pour un chemin différent et en traitant un chemin en fonction d'une priorité dans la convergence de chemin, la performance de la convergence de chemin est améliorée et le flux de service important est protégé de la perte.
PCT/CN2008/071398 2007-06-26 2008-06-20 Procédé et dispositif destinés à la convergence d'un chemin WO2009000196A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN200710123013.8 2007-06-26
CN200710123013.8A CN101068214B (zh) 2007-06-26 2007-06-26 一种路由收敛方法和设备

Publications (1)

Publication Number Publication Date
WO2009000196A1 true WO2009000196A1 (fr) 2008-12-31

Family

ID=38880651

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2008/071398 WO2009000196A1 (fr) 2007-06-26 2008-06-20 Procédé et dispositif destinés à la convergence d'un chemin

Country Status (2)

Country Link
CN (1) CN101068214B (fr)
WO (1) WO2009000196A1 (fr)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101068214B (zh) * 2007-06-26 2013-01-30 华为技术有限公司 一种路由收敛方法和设备
WO2011116731A2 (fr) * 2011-04-29 2011-09-29 华为技术有限公司 Procédé et routeur de mise à jour de routage
CN103220228A (zh) * 2013-04-10 2013-07-24 杭州华三通信技术有限公司 一种bgp路由的发送方法和设备
CN104579794B (zh) * 2015-01-27 2019-02-19 新华三技术有限公司 查询设备故障检测方法以及装置
CN105991388A (zh) * 2015-02-05 2016-10-05 中兴通讯股份有限公司 路由收敛方法、装置及虚拟专用网vpn系统
US9832116B2 (en) * 2016-03-14 2017-11-28 Cisco Technology, Inc. Adjusting entries in a forwarding information base in a content centric network
US10063457B2 (en) * 2016-03-29 2018-08-28 Juniper Networks, Inc. Method, system, and apparatus for improving forwarding capabilities during route convergence
US10205787B2 (en) * 2016-07-14 2019-02-12 Juniper Networks, Inc. Method, system, and apparatus for reducing the size of route updates
CN111641555B (zh) * 2020-04-01 2023-06-13 新华三信息安全技术有限公司 一种路由收敛方法及装置
CN111884936A (zh) * 2020-07-22 2020-11-03 深信服科技股份有限公司 一种路由方法、装置及电子设备和存储介质
CN112637053B (zh) * 2020-12-30 2022-05-20 锐捷网络股份有限公司 路由的备份转发路径的确定方法及装置

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1783841A (zh) * 2004-11-01 2006-06-07 朗迅科技公司 软路由器协议分散
WO2006071901A2 (fr) * 2004-12-29 2006-07-06 Cisco Technology, Inc. Etiquetage automatique de chemins bgp de saut suivant dans igp
CN1870513A (zh) * 2005-05-23 2006-11-29 华为技术有限公司 一种网络收敛的实现方法
CN101068214A (zh) * 2007-06-26 2007-11-07 华为技术有限公司 一种路由收敛方法和设备
CN101155118A (zh) * 2006-09-27 2008-04-02 华为技术有限公司 Bgp路由处理方法及装置

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001223744A (ja) * 2000-02-09 2001-08-17 Nec Corp 経路設計システム及び経路設計方法

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1783841A (zh) * 2004-11-01 2006-06-07 朗迅科技公司 软路由器协议分散
WO2006071901A2 (fr) * 2004-12-29 2006-07-06 Cisco Technology, Inc. Etiquetage automatique de chemins bgp de saut suivant dans igp
CN1870513A (zh) * 2005-05-23 2006-11-29 华为技术有限公司 一种网络收敛的实现方法
CN101155118A (zh) * 2006-09-27 2008-04-02 华为技术有限公司 Bgp路由处理方法及装置
CN101068214A (zh) * 2007-06-26 2007-11-07 华为技术有限公司 一种路由收敛方法和设备

Also Published As

Publication number Publication date
CN101068214B (zh) 2013-01-30
CN101068214A (zh) 2007-11-07

Similar Documents

Publication Publication Date Title
WO2009000196A1 (fr) Procédé et dispositif destinés à la convergence d'un chemin
US10341237B2 (en) Flow-based adaptive private network with multiple WAN-paths
Savage et al. The end-to-end effects of Internet path selection
Riley Large-scale network simulations with GTNetS
CN1713617B (zh) 通信统计收集装置
US7843827B2 (en) Method and device for configuring a network device
Thompson et al. Retiring replicants: Congestion control for intermittently-connected networks
US20140241366A1 (en) Comprehensive Multipath Routing for Congestion and Quality-of-Service in Communication Networks
US11870696B2 (en) Method and system for triggering augmented data collection on a network device based on traffic patterns
US11665084B2 (en) Method and apparatus for determining forwarding port in information centeric network
TW200408226A (en) Guaranteed service in a data network
CN102158406B (zh) 面向计算机网络链路的智能选路方法
CN108494583A (zh) 一种基于sFlow生成网络拓扑的方法及装置
CN108566335B (zh) 一种基于NetFlow的网络拓扑生成方法
CN115665207A (zh) 一种提升软件定义物联网中的数据传输速度的方法
JP4537937B2 (ja) 輻輳制御方法、輻輳制御プログラム、および、輻輳制御システム
Zhu et al. Introducing Additional Network Measurements into Active Queue Management
Domżał et al. Efficient congestion control mechanism for flow‐aware networks
Haikal et al. Towards internet QoS provisioning based on generic distributed QoS adaptive routing engine
Gao Line Quality Evaluation and Service Scheduling Scheme Based on SD-WAN Network
Lan et al. Passive overall packet loss estimation at the border of an ISP
CN115412506B (zh) 一种数据中心网络中大象流识别及调度方法
CN116633864B (zh) 一种基于云计算平台的流量调度方法
Yi et al. Technique for Estimating the Number of Active Flows in High‐Speed Networks
Seol et al. Performance improvement of adaptive AQM using the variation of queue length

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 08757807

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 08757807

Country of ref document: EP

Kind code of ref document: A1