WO2017124722A1 - Procédé et appareil d'acheminement de service de pseudo-câble - Google Patents

Procédé et appareil d'acheminement de service de pseudo-câble Download PDF

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Publication number
WO2017124722A1
WO2017124722A1 PCT/CN2016/091915 CN2016091915W WO2017124722A1 WO 2017124722 A1 WO2017124722 A1 WO 2017124722A1 CN 2016091915 W CN2016091915 W CN 2016091915W WO 2017124722 A1 WO2017124722 A1 WO 2017124722A1
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WO
WIPO (PCT)
Prior art keywords
pseudowire
load
load sharing
forwarding
service
Prior art date
Application number
PCT/CN2016/091915
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English (en)
Chinese (zh)
Inventor
何建军
Original Assignee
中兴通讯股份有限公司
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Filing date
Publication date
Application filed by 中兴通讯股份有限公司 filed Critical 中兴通讯股份有限公司
Publication of WO2017124722A1 publication Critical patent/WO2017124722A1/fr

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    • 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
    • H04L45/68—Pseudowire emulation, e.g. IETF WG PWE3
    • 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
    • H04L45/28—Routing or path finding of packets in data switching networks using route fault recovery
    • 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
    • H04L45/50—Routing or path finding of packets in data switching networks using label swapping, e.g. multi-protocol label switch [MPLS]
    • 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
    • H04L47/12—Avoiding congestion; Recovering from congestion
    • H04L47/125—Avoiding congestion; Recovering from congestion by balancing the load, e.g. traffic engineering

Definitions

  • the present application relates to, but is not limited to, the field of data network communication, and in particular, to a method and an apparatus for forwarding a pseudowire service.
  • the Layer 2 virtual private network also known as L2VPN, Layer 2 VPN
  • L2VPN Layer 2 virtual private network
  • L2VPN Layer 2 virtual private network
  • ATM Asynchronous Transfer Mode
  • FR Frame Relay
  • FR Virtual Local Area Network
  • VLAN Virtual Local Area Network
  • Ethernet Ethernet
  • PPP Point-to-Point Protocol
  • MPLS L2VPN transparently transmits user Layer 2 data over an MPLS network. From the user's point of view, the MPLS network is a Layer 2 switching network that can establish Layer 2 connections between different nodes.
  • the pseudowire is the most basic channel for carrying the transmission service in the communication network. Each pseudowire only plans to carry a specific service. The service only transmits on the pseudowire belonging to the service, and the pseudowire corresponds to the service one by one. If only one Pseudo Wire (PW) is established between the two network service provider edge devices (PEs), when the PW fails, the PEs cannot communicate with each other.
  • PW Pseudo Wire
  • L2VPN-FRR Layer 2 virtual private network fast reroute
  • PW-FRR Pseudo-Wire Fast Reroute
  • PW-FRR Pseudo-Wire Emulation Edge to Edge
  • the basic principle is to protect a PW with a pre-established PW, that is, PW redundancy. (PW Redundancy).
  • PW Redundancy The pre-established PW is called the standby PW, and the protected PW is called the primary PW.
  • the ultimate goal of L2VPN FRR is to protect the primary path by using the standby PW to bypass the faulty link or node.
  • FIG. 1 is a schematic diagram of pseudo-line dual-homing protection according to the related art, as shown in FIG. On PE2 and PE3, PW12 and PW13 are redundant hot backups.
  • the active and standby attributes are statically specified during network planning. Only one PW can perform actual service forwarding at any time.
  • the link fault detection technology is used to trigger the pseudowire dual-homing protection PW-FRR to switch.
  • the PW-FRR switch is triggered, so that the traffic on PE1 can be quickly switched to the standby PW (PW13).
  • the PW-FRR is switched back, and the traffic can be quickly switched back to the primary PW.
  • the related art does not propose an effective solution to the problem that the active/standby switching time is too long in the case where the pseudowire service forwarding resource waste and/or link failure in the related art.
  • the purpose of the present application is to provide a method and an apparatus for forwarding a pseudowire service, which solves the problem that the active/standby switching time is too long in the case where the pseudowire service forwarding resource is wasted and/or the link is faulty in the related art.
  • a method for forwarding a pseudowire service which includes: a first service provider edge device PE establishes a pseudowire load sharing group, wherein the pseudowire load sharing group includes a plurality of pseudowires; The PE performs load sharing processing in the forwarding service through the pseudowire load sharing group.
  • the step of performing, by the first PE, the load sharing process in the forwarding service by the pseudo-line load sharing group includes: the first PE performing an average sharing process on the load in the forwarding service by using the multiple pseudowires.
  • the method further includes: detecting, by the first PE, whether the multiple pseudowires are faulty; In the case where the line fails, the first PE instructs the pseudo-line load sharing group to transfer the load on the faulty pseudo-line to the non-fault pseudo-line, and the load processing in the forwarding service is performed by the non-fault pseudo-line.
  • the first PE indicates that the pseudowire load sharing group transfers the load on the fault pseudo-line to the non-fault pseudo-line, and performs load processing in the forwarding service by using the non-fault pseudo-line
  • the method further includes: the first PE detecting whether the fault of the faulty pseudowire disappears; and in the case that the fault of the faulty pseudowire disappears, the first PE performs load sharing on the faulty pseudowire.
  • the step that the first PE indicates that the pseudowire load sharing group transfers the load on the faulty pseudowire to the non-fault pseudowire includes: the first PE indicates that the pseudowire load sharing group converges through the forwarding layer. The load on the faulty pseudowire.
  • the step of the first PE detecting whether the multiple pseudowires are faulty comprises: detecting, by the first PE, the BFD packet and/or the operation and maintenance management OAM packet, whether the multiple pseudowires are faulty If the fault alarm is received in response to the BFD packet and/or the OAM packet, the first PE determines that the pseudowire pointed by the fault alarm is faulty.
  • the application further provides a computer readable storage medium storing computer executable instructions that are implemented when the computer executable instructions are executed.
  • a pseudowire service forwarding device which is applied to a first service provider edge device, and the pseudowire service forwarding device includes: establishing a template, and setting a pseudowire load sharing group, wherein the The pseudo-line load sharing group includes a plurality of pseudo-lines; the sharing processing module is configured to perform load sharing processing in the forwarding service by the pseudo-line load sharing group.
  • the sharing processing module includes: a processing unit configured to perform an average sharing process on the load in the forwarding service by using the multiple pseudowires.
  • the device further includes: a first detecting module, configured to detect whether the multiple pseudowires are faulty after the load sharing processing in the forwarding service is performed by the sharing processing module by the pseudo line load sharing group; And configured to, in the case that a pseudowire fails, instruct the pseudowire load sharing group to transfer the load on the faulty pseudowire to the non-fault pseudowire; and the load processing module is configured to forward through the non-fault pseudowire Load handling in the business.
  • a first detecting module configured to detect whether the multiple pseudowires are faulty after the load sharing processing in the forwarding service is performed by the sharing processing module by the pseudo line load sharing group
  • the load processing module is configured to forward through the non-fault pseudowire Load handling in the business.
  • the device further includes: a second detecting module, configured to: after the composite processing module performs load processing in the forwarding service by using the non-faulted pseudowire, detecting whether the fault of the faulty pseudowire disappears; adding a module, In the case where the failure of the faulty pseudowire disappears, the faulty pseudowire is added to the pseudowire load sharing group.
  • a second detecting module configured to: after the composite processing module performs load processing in the forwarding service by using the non-faulted pseudowire, detecting whether the fault of the faulty pseudowire disappears; adding a module, In the case where the failure of the faulty pseudowire disappears, the faulty pseudowire is added to the pseudowire load sharing group.
  • the technical solution of the pseudo-line load sharing is used to solve the problem that the active/standby switching time is too long in the case of the waste of the pseudo-line service forwarding resources and/or the link failure in the related art, and the pseudo-line service forwarding resource is saved. Increased the speed of convergence.
  • 1 is a schematic diagram of pseudo-line dual return protection according to the related art
  • FIG. 2 is a flowchart (1) of a method for forwarding a pseudowire service according to an embodiment of the present invention
  • FIG. 3 is a block diagram (1) of a pseudowire service forwarding apparatus according to an embodiment of the present invention.
  • FIG. 4 is a block diagram (2) of a pseudowire service forwarding apparatus according to an alternative embodiment of the present invention.
  • FIG. 5 is a block diagram (3) of a pseudowire service forwarding apparatus according to an alternative embodiment of the present invention.
  • FIG. 6 is a block diagram (4) of a pseudowire service forwarding apparatus according to an alternative embodiment of the present invention.
  • FIG. 7 is a schematic diagram of a pseudowire service forwarding method according to an embodiment of the present invention.
  • FIG. 8 is a flowchart (2) of a pseudowire service forwarding method according to an embodiment of the present invention.
  • FIG. 2 is a flowchart (1) of a method for forwarding a pseudowire service according to an embodiment of the present invention. As shown in FIG. 2, the process includes the following steps:
  • Step S202 The first service provider edge device PE establishes a pseudo-line load sharing group, where the pseudo-line load sharing group includes multiple pseudo-lines;
  • Step S204 The first PE performs load sharing processing in the forwarding service by using the pseudowire load sharing group.
  • the first PE performs an average load processing on the load in the forwarding service by using the multiple pseudowires.
  • the first PE detects whether the multiple pseudowires are faulty; In the event of a failure, the first PE instructs the pseudowire load sharing group to transfer the load on the faulty pseudowire to the non-fault pseudowire, and the load processing in the forwarding service is performed by the non-fault pseudowire.
  • the first PE indicates that the pseudowire load sharing group transfers the load on the fault pseudo-line to the non-fault pseudo-line, and performs load processing in the forwarding service by using the non-fault pseudo-line
  • the first PE detects whether the fault of the faulty pseudowire disappears; if the fault disappears, the first PE performs the load sharing processing in the forwarding service.
  • the step of the first PE indicating that the pseudowire load sharing group transfers the load on the faulty pseudowire to the non-fault pseudowire includes: the first PE indicating that the pseudowire load sharing group converges through the forwarding layer The load on the faulty pseudowire.
  • the above convergence means that in the case of a failure or failure of the pseudowire, the router issues an update message, causing the recalculation of the best path, and finally reaching the best recognized path for all routers, referring to the change from the network to the identification of all routers. Change and adapt to the change.
  • the first PE may detect whether the multiple pseudowires are faulty by using a bidirectional forwarding detection BFD packet and/or an operation maintenance management OAM packet.
  • the BFD packet corresponding to the faulty pseudowire and/or the response packet of the OAM packet are faulty, and the first PE determines that the pseudowire pointed by the fault alarm is faulty.
  • Embodiments of the present invention further provide a computer readable storage medium storing computer executable instructions that are implemented when the computer executable instructions are executed.
  • FIG. 3 is a block diagram (1) of a pseudowire service forwarding apparatus according to an embodiment of the present invention. As shown in FIG. 3, the apparatus includes:
  • the sharing processing module 32 is configured to perform load sharing processing in the forwarding service by the pseudowire load sharing group.
  • FIG. 4 is a block diagram (2) of a pseudowire service forwarding apparatus according to an alternative embodiment of the present invention.
  • the sharing processing module 32 includes:
  • the processing unit 41 is configured to perform an average sharing process on the load in the forwarding service by using the multiple pseudowires.
  • FIG. 5 is a block diagram (3) of a pseudowire service forwarding apparatus according to an alternative embodiment of the present invention. As shown in FIG. 5, the apparatus further includes:
  • the first detecting module 51 is configured to detect whether the multiple pseudowires are faulty after the load sharing processing in the forwarding service is performed by the sharing processing module through the pseudowire load sharing group;
  • the indicating module 52 is configured to, when the pseudowire fails, instruct the pseudowire load sharing group to transfer the load on the faulty pseudowire to the non-fault pseudowire;
  • the load processing module 53 is configured to perform load processing in the forwarding service by the non-faulty pseudowire.
  • FIG. 6 is a block diagram (4) of a pseudowire service forwarding apparatus according to an alternative embodiment of the present invention. As shown in FIG. 6, the pseudowire service forwarding apparatus further includes:
  • the second detecting module 61 is configured to detect whether the fault of the faulty pseudowire disappears
  • the adding module 62 is arranged to add the faulty pseudowire to the pseudowire load sharing group if the detection result is YES.
  • the normal working pseudowire has only one main pseudowire working, and the other spare pseudowire performs backup protection.
  • the pseudowire protection switches to the alternate pseudowire to ensure The normal work forwarding of the business.
  • two or more pseudowires can work together to jointly perform forwarding processing of services, and there is no idle pseudowire resource, so that system bandwidth resource utilization is maximized.
  • the above idle pseudowire resource means that in the pseudowire dual-homing protection mode, the receiving end only needs to receive the traffic load on the main pseudowire when working normally, and only when the main pseudowire fails and the active/standby switchover occurs. It is necessary to receive the traffic load carried on the pseudowire.
  • the bidirectional forwarding detection (BFD) packet or the operation and maintenance management (OAM) is used.
  • the packet detection mechanism quickly detects that the pseudowire link fault directly converges on the online card forwarding plane, and does not need to interact with the control plane automatic protection switching APS. This process does not require mutual negotiation between the two parties, which takes less time and meets the 50ms carrier-class protection convergence standard.
  • FIG. 7 is a schematic diagram of a method for forwarding a pseudowire service according to an alternative embodiment of the present invention.
  • two devices are networked by PE1 and PE2.
  • PW1, PW2, ..., PWn (n ⁇ 2) In the normal state, all PWs on the forwarding plane, such as PW1, PW2, ..., PWn (n ⁇ 2), allocate bandwidth on average to forward traffic, effectively use bandwidth, and improve bandwidth utilization.
  • the load balancing group of the forwarding plane converges quickly, and other pseudowires such as PW2, ..., PWn (n ⁇ 2) are re-selected for traffic forwarding.
  • the pseudo-line load sharing group converges rapidly, and the forwarding plane re-selects the PW to join the pseudo-line load sharing group for traffic forwarding.
  • FIG. 8 is a flowchart (2) of a method for forwarding a pseudowire service according to an alternative embodiment of the present invention. As shown in FIG. 8, the process includes the following steps:
  • Step S802 The BFD packet/OAM packet detection of the pseudowire is enabled on the device configured with the pseudowire load sharing group, and each pseudowire of the pseudowire load sharing group carries the forwarding traffic, and the process proceeds to step S804;
  • Step S804 determining whether the pseudowire link alarm in the OAM packet/BFD packet corresponding to the pseudowire of the pseudowire load sharing group is detected, and if there is an alarm, determining that the pseudowire is faulty, proceeding to step S806, If there is no alarm, repeat step S804;
  • Step S806 If the pseudowire link alarm in the OAM packet/BFD packet corresponding to the pseudowire of the pseudowire load sharing group is detected, the pseudowire load sharing group perceives one of the pseudowire faults and quickly converges, and other pseudowires Continue the load sharing to forward the traffic, and proceed to step S808;
  • Step S808 It is determined whether the false link link alarm in the OAM packet or the BFD packet corresponding to the pseudowire of the pseudowire load sharing group is lost. If the alarm disappears, the process proceeds to step S810, and if the alarm does not disappear, the process is repeated. Step S808;
  • Step S810 If the pseudowire link alarm in the OAM packet/BFD packet corresponding to the pseudowire of the pseudowire load sharing group disappears, the pseudowire load sharing group detects the pseudowire fault disappearing, and quickly converges to add the pseudowire to the When the load sharing group continues the load sharing and forwards the traffic, the process proceeds to step S804.
  • modules or steps of the present application can be implemented by a general computing device, which can be concentrated on a single computing device or distributed in a network composed of multiple computing devices. Alternatively, they may be implemented by program code executable by the computing device such that they may be stored in the storage device by the computing device and, in some cases, may be different from the order herein.
  • the steps shown or described are performed, or they are separately fabricated into individual integrated circuit modules, or a plurality of modules or steps thereof are fabricated as a single integrated circuit module.
  • the application is not limited to any particular combination of hardware and software.
  • each module/unit in the above embodiment may be implemented in the form of hardware, for example, by implementing an integrated circuit to implement its corresponding function, or may be implemented in the form of a software function module, for example, executing a program stored in the memory by a processor. / instruction to achieve its corresponding function.
  • Embodiments of the invention are not limited to any particular form of hardware and The combination of software.
  • the technical solution of the pseudo-line load sharing is used to solve the problem that the active/standby switching time is too long in the case of the waste of the pseudo-line service forwarding resources and/or the link failure in the related art, and the pseudo-line service forwarding resource is saved. Increased the speed of convergence.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Maintenance And Management Of Digital Transmission (AREA)
  • Data Exchanges In Wide-Area Networks (AREA)

Abstract

L'invention concerne un procédé et un appareil d'acheminement de service de pseudo-câble. Le procédé d'acheminement de service de pseudo-câble, appliqué à un réseau de communication à commutation d'étiquettes multiprotocoles, comprend les étapes suivantes : un premier dispositif de côté fournisseur (PE) établit un groupe de partage de charge de pseudo-câble, le groupe de partage de charge de pseudo-câble comprenant plusieurs pseudo-câbles; et le premier dispositif de PE effectue un traitement de partage de charge dans un service d'acheminement au moyen du groupe de partage de charge de pseudo-câble. Cette solution résout le problème constaté dans l'art connexe du gaspillage de ressources dans l'acheminement de service de pseudo-câble et/ou de la durée excessive de la commutation entre un dispositif principal et un dispositif secondaire en cas de défaillance d'une liaison, et permet par conséquent d'économiser des ressources dans l'acheminement de service de pseudo-câble et d'améliorer la vitesse de convergence.
PCT/CN2016/091915 2016-01-21 2016-07-27 Procédé et appareil d'acheminement de service de pseudo-câble WO2017124722A1 (fr)

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CN201610042111.8A CN106992927A (zh) 2016-01-21 2016-01-21 一种伪线业务转发方法及装置
CN201610042111.8 2016-01-21

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CN108881054A (zh) * 2018-09-13 2018-11-23 新华三技术有限公司 报文转发方法和装置

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101217470A (zh) * 2007-12-29 2008-07-09 华为技术有限公司 转发报文的方法和设备
CN101257441A (zh) * 2008-02-29 2008-09-03 华为技术有限公司 转发报文的方法、设备、系统和接收报文的设备
EP2854352A1 (fr) * 2013-09-30 2015-04-01 Juniper Networks, Inc. Procédés et appareil pour la mise en oeuvre de la connectivité entre des dispositifs périphériques par l'intermédiaire d'une matrice de commutation

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101217470A (zh) * 2007-12-29 2008-07-09 华为技术有限公司 转发报文的方法和设备
CN101257441A (zh) * 2008-02-29 2008-09-03 华为技术有限公司 转发报文的方法、设备、系统和接收报文的设备
EP2854352A1 (fr) * 2013-09-30 2015-04-01 Juniper Networks, Inc. Procédés et appareil pour la mise en oeuvre de la connectivité entre des dispositifs périphériques par l'intermédiaire d'une matrice de commutation

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