WO2008119277A1 - Procédé et dispositif pour mettre en oeuvre mpls-te sur une interface vlan - Google Patents

Procédé et dispositif pour mettre en oeuvre mpls-te sur une interface vlan Download PDF

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Publication number
WO2008119277A1
WO2008119277A1 PCT/CN2008/070378 CN2008070378W WO2008119277A1 WO 2008119277 A1 WO2008119277 A1 WO 2008119277A1 CN 2008070378 W CN2008070378 W CN 2008070378W WO 2008119277 A1 WO2008119277 A1 WO 2008119277A1
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WO
WIPO (PCT)
Prior art keywords
tunnel
mpls
bandwidth value
physical interface
interface
Prior art date
Application number
PCT/CN2008/070378
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English (en)
Chinese (zh)
Inventor
Yu Fan
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 WO2008119277A1 publication Critical patent/WO2008119277A1/fr

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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
    • H04L12/4641—Virtual LANs, VLANs, e.g. virtual private networks [VPN]

Definitions

  • the present invention relates to the field of network communication technologies, and in particular, to a method and an apparatus for implementing MPLS TE on a VLAN interface.
  • Ethernet With the rapid development and widespread application of Ethernet technology, the cost of deploying Ethernet networks is becoming more and more rampant. At the same time, it faces IP-based services such as Triple-Play (three networks in one) and IPTV (Internet Protocol Television). New services such as Internet Protocol (Network Protocol) technology continue to emerge.
  • IP-based services such as Triple-Play (three networks in one) and IPTV (Internet Protocol Television).
  • New services such as Internet Protocol (Network Protocol) technology continue to emerge.
  • Traditional SDH/SONET Synchronous Digital Hierarchy/Synchronous Optical Network
  • SDH/SONET Synchronous Digital Hierarchy/Synchronous Optical Network
  • Carrier Ethernet needs to address the shortcomings and shortcomings of traditional Ethernet technology in Ethernet-based technologies, such as Ethernet broadcast storms, user-oriented connectivity, and end-to-end QoS (Quality of Service, Quality of service guarantees, slow business recovery after network failure, etc.
  • Ethernet broadcast storms such as Ethernet broadcast storms, user-oriented connectivity, and end-to-end QoS (Quality of Service, Quality of service guarantees, slow business recovery after network failure, etc.
  • QoS Quality of Service, Quality of service guarantees, slow business recovery after network failure, etc.
  • VLAN Virtual Local Area Network
  • MPLS Multi-protocol label switching over Ethernet
  • PBT Provider Backbone Transport
  • MPLS multi-protocol label switching over Ethernet
  • MPLS TE multi-protocol label switching traffic engineering
  • MPLS TE technology is an extension of MPLS technology.
  • MPLS technology cannot provide QoS guarantee, and MPLS TE technology overcomes this shortcoming.
  • RSVP Resource Reservation Protocol
  • the parameters are received.
  • the network devices must allocate bandwidth on their respective interfaces according to the bandwidth parameters requested by the user, that is, bandwidth reservation. Only when all the devices passing through the tunnel meet the bandwidth request of the user, a complete tunnel is successfully established. If RSVP discovers that a certain device that the tunnel will pass cannot meet the bandwidth requirement during the bandwidth reservation release process, it will automatically re-initiate the tunnel establishment request to the new device until all devices meet the bandwidth requirements. Therefore, tunnels set up by MPLS can provide end-to-end QoS guarantees.
  • MPLS TE technology also provides FRR (Fast Reroute) technology to ensure fast service switching, and it is clear that the time for fault protection switching is less than 50ms.
  • VLAN interface (a VLAN-based IP)
  • the logical interface of the attribute provides an interface form that can connect to the VLAN and MPLS TE.
  • the VLAN interface can not only complete the link layer forwarding inside the VLAN, but also participate in the network layer forwarding because it has IP attributes.
  • the MPLS TE tunnel is directly established on the VLAN interface.
  • the VLAN interface of the MPLS TE tunnel is used.
  • Bandwidth values can be allocated to allocate bandwidth.
  • a VLAN-based IP network layer logical interface a VLAN interface does not directly have many attributes of the actual physical interface, such as bandwidth parameters and interface status.
  • bandwidth parameters and interface status are the following drawbacks: due to the direct physical connection between the two devices An interface can carry multiple VLANs and VLAN interfaces at the same time. On the physical interface, multiple MPLS TE tunnels with different next hops can be built at the same time.
  • bandwidth requests between different VLANs cannot be distinguished. For example: Assume that two VLANs and corresponding VLAN interfaces are set on a physical interface of 1000M bandwidth, and two MPLS TE tunnels are set on the VLAN interface. One application has a bandwidth of 300M, and the other application bandwidth is 700M. If the bandwidth of the existing VLAN interface is used to allocate bandwidth, the 1000M bandwidth reserved on the physical interface is shared by the two tunnels; this causes the following problems: When the actual traffic on the tunnel applying for 300M bandwidth exceeds When the reserved 300M, it will preempt the bandwidth resources reserved by another tunnel. Therefore, QoS guarantee cannot be provided, that is, the MPLS TE tunnel cannot provide bandwidth guarantee.
  • the inventors of the present invention have found that the existing technical solutions can establish MPLS on a VLAN interface.
  • the MPLS TE on the VLAN interface cannot be implemented. That is, the bandwidth allocation of the MPLS TE tunnel cannot be guaranteed.
  • the embodiment of the invention provides a method and a device for implementing MPLS TE on a VLAN interface, and can establish an MPLS TE tunnel based on bandwidth guarantee.
  • the embodiment of the invention provides a method for implementing MPLS TE on a VLAN interface, where the method includes:
  • An embodiment of the present invention provides an apparatus for implementing MPLS TE on a VLAN interface, where the apparatus includes:
  • An available bandwidth allocation unit configured to determine, according to the currently assignable bandwidth value, the physical The MPLS TE tunnel corresponding to the VLAN interface on the interface allocates available bandwidth.
  • the method and device for implementing MPLS TE on a VLAN interface are adopted in the carrier-class Ethernet, and the VLAN-based interface is adopted.
  • the bandwidth of the MPLS TE tunnel is guaranteed to ensure the reasonable allocation of bandwidth resources on the MPLS TE tunnel.
  • FIG. 2 is a structural diagram of a system according to an embodiment of the present invention.
  • the technical solution of the embodiment of the present invention includes: determining a current assignable bandwidth value of the physical interface; and allocating an available bandwidth to the MPLS TE tunnel corresponding to the VLAN interface on the physical interface according to the determined current assignable bandwidth value.
  • the current assignable bandwidth value may be determined based on the allocated bandwidth value of the physical interface and the total assignable bandwidth value of the physical interface; the allocated bandwidth value of the physical interface may include: the allocated bandwidth value of the VLAN interface on the physical interface ; and/or, other bandwidth values that have been assigned on this physical interface.
  • the physical interface of the embodiment of the present invention is to establish a physical interface of the MPLS TE tunnel, and the MPLS TE tunnel can be directly established on the VLAN interface, which may include the following steps: First, according to a predetermined rule, the physical between the devices in the network An interface carries multiple VLANs at the same time and establishes a VLAN interface corresponding to the VLAN. After that, an MPLS TE tunnel is established from one device in the network to another. Devices in the network can include: Routers or Layer 3 switches.
  • the method for establishing the MPLS TE tunnel I, the MPLS TE tunnel II, and the FRR backup tunnel may include: First, simultaneously carrying two VLANs, such as VLAN 1 and VLAN 2, on the physical interface between the directly connected P1 and P2 devices; Configure the corresponding VLAN interface 1 and VLAN interface 2 based on VLAN 1 and VLAN 2, and configure their respective IP addresses. Assume that the bandwidth of the physical interface on P1 is 1000 M.
  • an MPLS TE tunnel is established. Including: establishing an MPLS TE tunnel I from the PE A device to the PE B device, the path is PE A - P1 - P2 - PE B, wherein the outbound interface of the IP network layer of the MPLS TE tunnel I on the P1 is the VLAN interface 1;
  • the MPLS TE tunnel II of the PE A device to the PE C device is the PE A-PI-P2-PE C.
  • the outgoing interface of the IP network layer on the MPLS TE tunnel II is VLAN interface 2.
  • the bandwidth allocation is performed on the physical interface of the MPLS TE tunnel, which includes the following steps:
  • the interface that is configured to construct the MPLS TE tunnel is a logical interface based on the VLAN, and obtains physical interface information of the VLAN, a current assignable bandwidth value of the physical interface, and a bearer on the physical interface.
  • the number of VLANs may be performed by an RSVP unit in the network; the current assignable bandwidth value of the physical interface may be determined according to the allocated bandwidth value of the physical interface and the total assignable bandwidth value; the allocated bandwidth of the physical interface The value may be determined based on the allocated bandwidth value of the VLAN interface on the physical interface and/or other bandwidth values allocated on the physical interface;
  • Step 12 Perform a constrained route calculation of the reserved bandwidth according to the current assignable bandwidth value obtained in step 11, and allocate a bandwidth according to the calculation result; for example, the current assignable bandwidth value obtained in step 11 may be specifically transmitted by the RSVP unit to the CSPF. (Constraint Shortest Path First) unit; the CSPF unit participates in the constrained route calculation of the current allocateable bandwidth value on the physical interface, and transmits the calculation result to the RSVP unit, according to the received RSVP unit. The calculation result allocates available bandwidth to the MPLS TE tunnel corresponding to the VLAN interface.
  • the RSVP unit Constraint Shortest Path First
  • the available bandwidth of tunnel I is 300M;
  • the maximum available bandwidth of the physical interface is still 1000M.
  • the tunnel II can only apply for bandwidth resources from the remaining 700M.
  • the data traffic forwarded between the tunnel I and the tunnel does not preempt each other's bandwidth resources. That is, the method according to the embodiment of the present invention can guarantee the bandwidth guarantee of the MPLS TE tunnel.
  • MPLS TE FRR MPLS Traffic Engineering Fast Reroute
  • the fault monitoring technology such as BFD (Bidirectional Forwarding Detection)
  • BFD Bidirectional Forwarding Detection
  • BFD Bidirectional Forwarding Detection
  • the steps to implement the MPLS TE FRR function include:
  • Step 22 If the BFD monitoring unit finds that the next hop IP address of the VLAN interface 2 cannot be reached, the information of the next hop IP address of the VLAN interface 2 cannot be directly notified to the tunnel forwarding engine by using the correspondence formed in the step 21;
  • the tunnel forwarding engine performs the FRR switch immediately after receiving this information. That is, the traffic transmitted on the original MPLS TE tunnel II is switched to the backup tunnel for a predetermined time to continue forwarding, thereby minimizing the loss caused by the failure of the next hop IP address of the VLAN interface 2, and improving the tunnel. reliability.
  • the predetermined time is generally less than 50 ms.
  • the tunnel forwarding engine is a functional entity with information forwarding function in the MPLS TE tunnel.
  • the MPLS TE FRR function of the VLAN interface can quickly switch the user data service to the backup tunnel when the MPLS TE tunnel fails.
  • An available bandwidth allocation unit configured to allocate an available bandwidth to the MPLS TE tunnel corresponding to the VLAN interface on the physical interface according to the determined current assignable bandwidth value
  • a bandwidth update unit configured to update and save the current assignable bandwidth value of the physical interface according to the allocated bandwidth value of the current allocation.
  • the allocatable bandwidth value determining unit specifically includes:
  • the current allocatable bandwidth value determining unit configured to determine a current allocatable bandwidth of the physical interface according to the allocated bandwidth value of the physical interface determined by the allocated bandwidth value determining unit, and a total allocatable bandwidth value of the physical interface
  • the current allocatable bandwidth value determining unit may be a CSPF unit and an RSVP unit.
  • An FRR backup tunnel establishing unit is configured to establish an FRR backup tunnel for the MPLS TE tunnel that needs to be protected by the link.
  • the status table modification unit if the next hop IP address of the VLAN interface on the MPLS TE tunnel is unreachable, the state table for recording the next hop IP address of the MPLS TE tunnel is modified;
  • the FRR switch execution unit is configured to perform FRR switching according to the modified state table, and switch the transmitted data traffic to the FRR backup tunnel for a predetermined time to continue forwarding.
  • the bandwidth of the MPLS TE tunnel based on the VLAN interface is provided by using the technical means of allocating the available bandwidth for the MPLS TE tunnel corresponding to the VLAN interface on the physical interface.
  • the effect of ensuring a reasonable allocation of bandwidth resources on the MPLS TE tunnel is achieved.
  • the state table of the next hop IP address is modified, and the technical solution of the FRR switching is implemented, and the MPLS TE FRR function based on the VLAN interface is provided, in the case that the MPLS TE tunnel fails.

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  • Engineering & Computer Science (AREA)
  • Computer Security & Cryptography (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 pour mettre en oeuvre MPLS-TE sur une interface VLAN, qui consiste: à déterminer une valeur de largeur de bande attribuable courante d'une interface physique; à distribuer, sur la base de cette valeur, une largeur de bande réalisable pour le tunnel MPLS-TE correspondant à l'interface VLAN sur l'interface physique. La valeur de largeur de bande courante est déterminée en fonction de la valeur de largeur de bande attribuée et la valeur totale de largeur de bande attribuable.
PCT/CN2008/070378 2007-03-31 2008-02-29 Procédé et dispositif pour mettre en oeuvre mpls-te sur une interface vlan WO2008119277A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN2007100962177A CN101030917B (zh) 2007-03-31 2007-03-31 一种在vlan接口上实现mpls te的方法及装置
CN200710096217.7 2007-03-31

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WO2008119277A1 true WO2008119277A1 (fr) 2008-10-09

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Publication number Priority date Publication date Assignee Title
CN101640632B (zh) * 2008-07-31 2014-03-12 华为技术有限公司 保护隧道带宽的方法和装置
CN101562575B (zh) * 2009-06-04 2012-01-04 杭州华三通信技术有限公司 Mpls te frr快速切换的方法和装置
CN102064995B (zh) * 2009-11-18 2012-12-19 中兴通讯股份有限公司 一种虚拟专用局域网络中链路保护的方法及设备
CN102355398B (zh) * 2011-06-22 2017-10-27 南京中兴软件有限责任公司 Mpls l3vpn私有虚拟网快速重路由方法及系统
CN102263692A (zh) * 2011-07-20 2011-11-30 中兴通讯股份有限公司 三层交换机及用于三层交换机的路由方法
US9860188B2 (en) * 2011-12-22 2018-01-02 International Business Machines Corporation Flexible and scalable enhanced transmission selection method for network fabrics

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US20050259586A1 (en) * 2004-05-19 2005-11-24 Abdelhakim Hafid Dynamic traffic rearrangement and restoration for MPLS networks with differentiated services capabilities
CN1953421A (zh) * 2006-11-21 2007-04-25 华为技术有限公司 一种基于网络设备的带宽预留方法及装置
CN101005405A (zh) * 2006-12-21 2007-07-25 华为技术有限公司 一种在带宽按需分配业务中调整带宽的方法和装置

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CN1859430B (zh) * 2005-08-09 2010-04-28 华为技术有限公司 Ip传输系统及其方法

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Publication number Priority date Publication date Assignee Title
US20050259586A1 (en) * 2004-05-19 2005-11-24 Abdelhakim Hafid Dynamic traffic rearrangement and restoration for MPLS networks with differentiated services capabilities
CN1953421A (zh) * 2006-11-21 2007-04-25 华为技术有限公司 一种基于网络设备的带宽预留方法及装置
CN101005405A (zh) * 2006-12-21 2007-07-25 华为技术有限公司 一种在带宽按需分配业务中调整带宽的方法和装置

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