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WO2007028295A1 - Procede de gestion destine a l'etat de liaison d'association - Google Patents

Procede de gestion destine a l'etat de liaison d'association Download PDF

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Publication number
WO2007028295A1
WO2007028295A1 PCT/CN2006/001093 CN2006001093W WO2007028295A1 WO 2007028295 A1 WO2007028295 A1 WO 2007028295A1 CN 2006001093 W CN2006001093 W CN 2006001093W WO 2007028295 A1 WO2007028295 A1 WO 2007028295A1
Authority
WO
WIPO (PCT)
Prior art keywords
link
notification message
state
bundled
managing
Prior art date
Application number
PCT/CN2006/001093
Other languages
English (en)
Chinese (zh)
Inventor
Kang Zi
Jun Liu
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 WO2007028295A1 publication Critical patent/WO2007028295A1/fr

Links

Classifications

    • 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
    • H04L12/4633—Interconnection of networks using encapsulation techniques, e.g. tunneling
    • 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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L69/00—Network arrangements, protocols or services independent of the application payload and not provided for in the other groups of this subclass
    • H04L69/30—Definitions, standards or architectural aspects of layered protocol stacks
    • H04L69/32—Architecture of open systems interconnection [OSI] 7-layer type protocol stacks, e.g. the interfaces between the data link level and the physical level
    • H04L69/322—Intralayer communication protocols among peer entities or protocol data unit [PDU] definitions
    • H04L69/324—Intralayer communication protocols among peer entities or protocol data unit [PDU] definitions in the data link layer [OSI layer 2], e.g. HDLC

Definitions

  • the present invention relates to the field of network communications, and in particular, to a method for managing a bundle link state. Background technique
  • PWE3 Pulseudo Wire Emulation Edge-to-Edge is a simulation of ATM (Asynchronous Transfer Mode), Frame Relay, Ethernet, Low Speed TDM (Time Division) in PSN (Packet Switched Network) Techniques for the basic characteristics of circuits and other services such as SONET/SDH (synchronous optical network/synchronous digital series).
  • PWE3 uses the PSN network to connect traditional network resources (ATM/FR/LAN, etc.) to provide simulation of traditional services on the PSN network. When traditional network services traverse the PSN network, the traditional network services are greatly simulated. End users do not feel the difference, PWE3 can protect the existing investment of users and operators in network integration and construction.
  • FIG. 1 A schematic diagram of the data flow forwarding process of the PWE3 service is shown in FIG. 1.
  • the CE (User Edge Equipment) 1 and the CE2 are interconnected through the PWE3, and the data flow forwarding process of the PWE3 service from the CE 1 to the CE2 is: Receives user data packets from CE1 through the access circuit AC (the physical circuit or virtual circuit that connects the CE to the PE) on PE1 (the service provider edge device). Then, PE1 sends the PW (connected to the virtual circuit of the PE) through the PW. Give PE2 to CE2. In the case of multiple hops, PE1 and PE2 may pass through multiple PEs. PE2 forwards the packets received from the PW to CE2 through the AC.
  • AC the physical circuit or virtual circuit that connects the CE to the PE
  • PE1 the service provider edge device
  • PE1 the service provider edge device
  • PE1 the service provider edge device
  • PE1 the service provider edge device
  • PE1 the service provider edge device
  • PE1 the service provider edge device
  • the link bundle is usually used on the AC, and the ACs at both ends are interconnected through PWE3.
  • the CE at this end can perceive it, but the CE at the other end cannot perceive it. Therefore, the CE at the other end will still use the bandwidth of the original bundled link to send data.
  • the data traffic is transmitted to the PE of the failed link, it will be discarded due to insufficient AC bandwidth, resulting in PSN bandwidth. Waste.
  • the present invention provides a method for managing a bundle link state, which can implement a PWE3 service.
  • the PEs that bundle the links at both ends notify the status information of the bundled link in time.
  • a method for managing a bundle link state comprising:
  • Edge-to-edge pseudo-line emulation The service provider edge device of the bundled link of the PWE3 service sends a link state notification message to notify the link state of the bundled link.
  • the method constructs a link state notification message on the PE of the bundle link of the PWE 3 service, and sends the link state notification message between the PEs.
  • the link state notification message includes: quantity information of a normal state link in the bundle link and available bandwidth information of the bundle link.
  • the access circuit AC sub-link state type length value TL V is set in the notification message of the label distribution LDP protocol of the PWE 3 service, and the notification message is used as the link state notification message.
  • the TLV includes the number of normal state links, bandwidth units, and bandwidth.
  • the number of normal state links, the bandwidth unit, and the bandwidth are set in the TLV, and the link state notification message is constructed according to the TLV.
  • the PE of the bundle link sends the link state notification message to the peer PE to notify the link fault information.
  • the peer PE discards the packet that exceeds the bandwidth according to the received message; or sends a congestion indication to the user edge device connected to it.
  • the present invention constructs and sends a link state notification message on the PE of the bundled link of the PWE3 service, so that the link at one end of the bundle link interconnected by PWE3 fails.
  • the PE that bundles the link at the other end can know the fault condition in time, and can perform traffic suppression in time to avoid waste of PSN bandwidth and reduce the number of traffic retransmissions between CEs.
  • FIG. 1 is a schematic diagram of a forwarding process of a data stream of a PWE3 service
  • FIG. 2 is a process flow diagram of a method for managing a bundle link state according to a preferred embodiment of the present invention. detailed description The present invention provides a management method for a bundle link state, and the core of the present invention is:
  • the related protocol between the PEs of the bundled link of the PWE3 service is extended.
  • the extended protocol is used to send a link state notification message between the PEs that are bound to the link at both ends to notify the status of the bundled link.
  • Step 2-1 Construct a link state notification message on the PE of the bundled link of the PWE3 service.
  • the method of the present invention constructs a link state notification message on the PE of the bundled link of the PWE3 service.
  • Constructing the above link state notification message may be based on a protocol running between PEs of the bundled link of the PWE3 service.
  • an AC sub-link TLV (state type length value) may be set in the notification message of the LDP protocol, where the TLV includes the number of normal state links. , bandwidth unit and bandwidth, and the notification message is used as a link status notification message.
  • the present invention can also set the number of normal state links, the bandwidth unit and the bandwidth in the PW state: PW state TLV between the PEs of the bundled link of the PWE3 service, and then, according to the TLV The link state notification message is constructed.
  • PW Status The format of the TLV can be expressed as follows:
  • Step 2-2 The link state notification message is sent between the PEs of the bundled link of the PWE3 service, and the link state of the bundled link is advertised.
  • the PEs that bundle the link between the two ends can send link state notification messages to each other to advertise the status of the link in the bundled link.
  • the status of the bundled link is notified to the peer PE in time. For example, in FIG. 1, when one or more links in the binding link on the AC between PE1 and CE1 fail, PE1 sends the link state notification message to PE2, and the notification message includes The number of normal links, available bandwidth information, etc. in the bundle link on the AC between PE1 and CE1.
  • Step 2-3 The PE of the bundled link performs corresponding processing according to the received message.
  • the PE of the bundled link at the other end of the PWE3 service After receiving the message about the advertised link status sent by the peer PE, the PE of the bundled link at the other end of the PWE3 service knows the status information of the bundled link of the peer end and can perform corresponding processing. For example, in Figure 1, when one or more links in the bundle link on the AC between PE1 and CE1 fails, PE2 knows PE1 and CE1 after receiving the link state notification message sent by PE1. The link state and bandwidth conditions in the bundled link between the ACs can be processed accordingly. For example, discard packets that exceed the bandwidth, or send congestion indications to CE2. Therefore, the waste of PSN bandwidth can be avoided, and the number of traffic retransmissions between CE1 and CE2 can be reduced.

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 de gestion destiné à l'état de liaison d'association, comprenant les étapes suivantes: envoi du message de notification d'état de liaison entre PE (dispositif de bordure du fournisseur de service) à la liaison d'association du service PWE3 (émulation de pseudo circuit bordure-bordure), et notification de l'état de liaison de la liaison d'association. L'utilisation du procédé de la présente invention, qui peut permettre de notifier à temps des informations d'état de la liaison d'association entre PE d'une liaison d'association à deux extrémités du service PWE3, d'éviter le gaspillage de bande passante de PSN et de diminuer la quantité de retransmission de trafic inter-CE.
PCT/CN2006/001093 2005-09-06 2006-05-25 Procede de gestion destine a l'etat de liaison d'association WO2007028295A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CNB2005100985998A CN100464519C (zh) 2005-09-06 2005-09-06 捆绑链路状态的管理方法
CN200510098599.8 2005-09-06

Publications (1)

Publication Number Publication Date
WO2007028295A1 true WO2007028295A1 (fr) 2007-03-15

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CN (1) CN100464519C (fr)
WO (1) WO2007028295A1 (fr)

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CN100471162C (zh) * 2007-04-28 2009-03-18 杭州华三通信技术有限公司 一种发布及处理虚线路信息的方法和供应商边缘设备
CN101094114A (zh) * 2007-06-15 2007-12-26 华为技术有限公司 一种捆绑链路的处理方法和设备
CN101227397B (zh) * 2008-01-28 2012-06-27 华为技术有限公司 保护链路的方法、设备和系统
CN101505274B (zh) * 2009-03-02 2011-07-06 华为技术有限公司 一种伪线路状态通告的方法、系统和装置
CN102045239B (zh) * 2009-10-13 2012-12-19 中兴通讯股份有限公司 点到多点伪线保护网络的实现方法及装置
CN102045232A (zh) * 2009-10-19 2011-05-04 中兴通讯股份有限公司 在二层虚拟专用网络中获取链路信息的方法及系统
CN102238138A (zh) * 2010-04-23 2011-11-09 中兴通讯股份有限公司 一种伪线业务的处理方法和系统
CN103024826B (zh) * 2012-12-10 2016-08-03 华为技术有限公司 带宽调整的方法、设备及系统

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Publication number Publication date
CN1929392A (zh) 2007-03-14
CN100464519C (zh) 2009-02-25

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