WO2017117956A1 - 一种信息传输方法及装置 - Google Patents

一种信息传输方法及装置 Download PDF

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Publication number
WO2017117956A1
WO2017117956A1 PCT/CN2016/089675 CN2016089675W WO2017117956A1 WO 2017117956 A1 WO2017117956 A1 WO 2017117956A1 CN 2016089675 W CN2016089675 W CN 2016089675W WO 2017117956 A1 WO2017117956 A1 WO 2017117956A1
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Prior art keywords
network
virtual
virtual network
node
edge node
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PCT/CN2016/089675
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English (en)
French (fr)
Inventor
张征
王翠
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中兴通讯股份有限公司
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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
Priority to EP16883091.7A priority Critical patent/EP3402130B1/en
Priority to US16/067,671 priority patent/US10855576B2/en
Publication of WO2017117956A1 publication Critical patent/WO2017117956A1/zh

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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
    • H04L45/16—Multipoint routing
    • 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
    • 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
    • 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 application relates to, but is not limited to, the field of communications, and in particular, to an information transmission method and apparatus.
  • the data center (DC, Data Center) has developed rapidly as a kind of virtual network, and the Internet has also changed and developed.
  • the data center is all-inclusive, from the disaster recovery center of the earliest important data to the computer room construction of enterprise users, including China's hosting business and information port service, all providing relevant development guarantee for the data center.
  • the data center is a complex set of facilities. It includes not only computer systems and other companion devices (such as communication and storage systems), but also redundant data communication connections, environmental control equipment, monitoring equipment, and various security devices.
  • the trend in enterprise-class data centers is a high degree of flexibility and adaptability, such as the ability to make rapid changes based on external needs.
  • the intermediate network generally includes an existing network protocol (IP) network, a Multi Protocol Label Switch (MPLS) network, a Layer 3 Virtual Private Network (L3VPN) network, and a bit index display. Copy (BIER, Bit Indexed Explicit Replication) network, etc. How to adapt to an efficient data center connection and deliver various information and services related to the data center are the hot technical directions. The data inside the data center will be encapsulated again when it is transmitted through the network.
  • IP network protocol
  • MPLS Multi Protocol Label Switch
  • L3VPN Layer 3 Virtual Private Network
  • BIER Bit Indexed Explicit Replication
  • VxLAN Virtual Extensible Local Area Network
  • NVGRE network virtualization
  • GRE Generic Routing Encapsulation
  • MPLS Over GRE MPLS Over GRE
  • the present application provides an information transmission method and device, which can realize the transmission of a virtual network identifier, thereby realizing efficient transmission of virtual network data.
  • the present application provides a method for transmitting information, including: a network edge node encapsulates a virtual network identifier of a connected virtual network to a multicast protocol packet when the node is connected to the virtual network; and the network edge node reports the multicast protocol The text is sent to the network edge node outside the node.
  • the method further includes: the network edge node receives, from the network edge node outside the node, a multicast protocol packet encapsulated with the virtual network identifier.
  • the method further includes: the network edge node according to the received multicast protocol packet And determining a set of network edge nodes corresponding to the virtual network identifier of the virtual network to which the node is connected.
  • the method further includes: the network edge node passing the group The broadcast mode sends a packet of the data to be transmitted encapsulated with the virtual network connected to the node to the network edge node in the set of network edge nodes corresponding to the virtual network identifier of the virtual network.
  • the virtual network identifier comprises: a virtual scalable local area network (VxLAN) network identifier, a network virtualization (NVGRE) virtual subnet identifier by using a universal routing encapsulation, or capable An identifier that identifies a virtual network.
  • VxLAN virtual scalable local area network
  • NVGRE network virtualization
  • the multicast protocol packet includes: a multicast listening and discovery (MLD) packet, an Internet Group Management Protocol (IGMP) packet, and a protocol-independent multicast (PIM) packet.
  • MLD multicast listening and discovery
  • IGMP Internet Group Management Protocol
  • PIM protocol-independent multicast
  • the application further discloses an information transmission device, which is applied to a network edge node, and includes: a package module, configured to encapsulate a virtual network identifier of the connected virtual network to a multicast protocol packet when the node is connected to the virtual network; The module is configured to send the multicast protocol packet to a network edge node outside the node.
  • the transmitting module is further configured to receive, from the network edge node outside the node, a multicast protocol packet encapsulating the virtual network identifier.
  • the device further includes: an information management module, configured to determine, according to the received multicast protocol message, a network edge node set corresponding to the virtual network identifier of the virtual network to which the node is connected.
  • an information management module configured to determine, according to the received multicast protocol message, a network edge node set corresponding to the virtual network identifier of the virtual network to which the node is connected.
  • the transmission module is further configured to: send, by using a multicast manner, a packet encapsulated with a data to be transmitted of a virtual network connected to the node to a network in a network edge node set corresponding to the virtual network identifier of the virtual network. Edge node.
  • the virtual network identifier comprises: a virtual scalable local area network (VxLAN) network identifier, a virtualized subnet identifier implemented by a universal routing encapsulation (NVGRE), or an identifier capable of uniquely marking a virtual network.
  • VxLAN virtual scalable local area network
  • NVGRE universal routing encapsulation
  • the multicast protocol packet includes: a multicast listening and discovery (MLD) packet, an Internet Group Management Protocol (IGMP) packet, and a protocol-independent multicast (PIM) packet.
  • MLD multicast listening and discovery
  • IGMP Internet Group Management Protocol
  • PIM protocol-independent multicast
  • the embodiment of the present application further provides a computer readable storage medium storing computer executable instructions, which are implemented when the computer executable instructions are executed.
  • the network edge node encapsulates the virtual network identifier of the connected virtual network to the multicast protocol packet when the node is connected to the virtual network; the network edge node sends the multicast protocol packet to the node.
  • Outer network edge nodes Through the application, the signaling propagation of the virtual network identifier in the network can be realized, thereby achieving efficient transmission of the virtual network data.
  • the network edge node determines, according to the received multicast protocol packet, a network edge node set corresponding to the virtual network identifier of the virtual network to which the node is connected.
  • This application determines each virtual The correspondence between the network and its related network edge node sets, thereby implementing various functions such as data broadcasting, synchronization, and backup of the virtual network (including the data center), and realizing the important functions of the intermediate network to connect the virtual network, thus not only expanding the data center
  • the use and deployment scenarios, and the development of the data center, the development of SDN and NFV technology and the development of intermediate network technology have a very good role.
  • FIG. 1 is a flowchart of an information transmission method according to an embodiment of the present invention
  • FIG. 2 is a schematic diagram of a virtual network interconnected through a network
  • FIG. 3 is a schematic diagram of network interconnection of a virtual network
  • FIG. 4 is an optional flowchart of an information transmission method according to an embodiment of the present invention.
  • FIG. 5 is a schematic diagram of an MLD protocol extension according to an embodiment of the present invention.
  • FIG. 6 is a schematic diagram of an IGMP protocol extension according to an embodiment of the present invention.
  • FIG. 7 is a schematic diagram of an extension of a PIM protocol according to an embodiment of the present invention.
  • FIG. 8 is a schematic diagram of another MLD protocol extension according to an embodiment of the present invention.
  • FIG. 9 is a schematic diagram of an information transmission apparatus according to an embodiment of the present invention.
  • FIG. 1 is a flowchart of an information transmission method according to an embodiment of the present invention. As shown in FIG. 1 , the information transmission method provided in this embodiment includes the following steps:
  • Step 101 The network edge node encapsulates the virtual network identifier of the connected virtual network to the multicast protocol packet when the virtual network is connected to the node;
  • Step 102 The network edge node sends the multicast protocol packet to the network edge node outside the node.
  • the method further includes: the network edge node receiving, from the network edge node outside the node, a multicast protocol packet encapsulating the virtual network identifier.
  • the method further includes: determining, by the network edge node, the node according to the received multicast protocol packet The virtual network identifier of the connected virtual network identifies a corresponding set of network edge nodes.
  • the method further includes: the network edge node passes the multicast The method sends a packet of the data to be transmitted encapsulated with the virtual network connected to the node to the network edge node in the network edge node set corresponding to the virtual network identifier of the virtual network.
  • the virtual network identifier includes: a VxLAN network identifier, an NVGRE virtual subnet identifier, or an identifier capable of uniquely marking a virtual network.
  • the multicast protocol packet includes: a multicast listener discovery (MLD) packet, an Internet Group Management Protocol (IGMP) packet, and protocol-independent multicast (PIM). Protocol Independent Multicast).
  • MLD multicast listener discovery
  • IGMP Internet Group Management Protocol
  • PIM protocol-independent multicast
  • the virtual network identifier is encapsulated in the multicast protocol packet in a Type-Length-Value (TLV) format.
  • TLV Type-Length-Value
  • the packet header of the multicast protocol packet carries a virtual network indication identifier, and is used to indicate whether the multicast protocol packet carries a virtual network identifier.
  • FIG. 2 is a schematic diagram of a virtual network (such as a data center) interconnected through a network.
  • the network edge nodes (Edge) 1 to Edge 6 first interact with the virtual network identifier of the data center to which they are connected through a multicast protocol, and the network edge node 1 will learn, for the representation Data center (DC) 1 encapsulated virtual network identifier corresponding to the set of network edge node (Edge) 3 and network edge node 6; likewise, network edge node 2, will be learned interactively through multicast protocol, for representing data center 2
  • the encapsulated virtual network identifier corresponds to a set of network edge nodes 4 and network edge nodes 5.
  • a network edge node connects to multiple virtual networks at the same time, it will be different virtual networks.
  • the identifiers respectively manage their corresponding sets of network edge nodes.
  • the network edge node advertises multiple virtual network identifiers connected at the same time, one or more virtual network identifiers of the same type may be encapsulated in one multicast protocol extension, or may be presented in different extensions. This application is not limited thereto.
  • the virtual network signaling is no longer connected to the virtual network, thereby corresponding to the virtual edge identifier of the virtual network of the virtual network.
  • the network edge collection node is removed.
  • FIG. 3 is a schematic diagram of network interconnection of a virtual network (such as inside a data center).
  • a network edge device that belongs to the same data center interacts with the virtual network identifier of the data center to which it is connected through a multicast protocol, and obtains a network corresponding to each virtual network identifier.
  • Edge node collection When the content of the data center needs to be multicast or broadcast to the corresponding set of network edge nodes, it can be directly transmitted through multicast.
  • the transmission mode in the network is encapsulated in a BIER message for transmission, and the destination address (Dest) of the BIER message indicates that other network edge nodes include an edge node (Edge) 2, Edge 3, Edge 4, and Edge 5 And Edge6.
  • the multicast protocol information arrives at other network edge nodes.
  • the network edge nodes obtain the virtual network information of the respective connections through this way.
  • the intermediate network encapsulation mode may have different encapsulation modes according to different intermediate networks.
  • the intermediate network is an MPLS network, and may also be encapsulated in a Multicast Label Distribution Protocol (MLDP) and a point-to-multipoint traffic engineering ( P2MP TE, Point-to-Multipoint Traffic Engineering) transmits in the tunnel.
  • MLDP Multicast Label Distribution Protocol
  • P2MP TE Point-to-Multipoint Traffic Engineering
  • FIG. 4 is an optional flowchart of an information transmission method according to an embodiment of the present invention. As shown in FIG. 4, the information transmission method provided in this embodiment includes the following steps:
  • Step 401 The network edge node encapsulates the virtual network identifier of the connected virtual network to the multicast protocol packet when the virtual network is connected to the node.
  • Step 402 The network edge node expands and interacts with the virtual network identifier of the virtual network to which it is connected through the multicast protocol.
  • Step 403 The network edge node determines, according to the received multicast protocol packet, a network edge node set corresponding to the virtual network identifier of the virtual network to which the node is connected.
  • the network edge node organizes and generates a virtual network identifier and its corresponding network edge section according to the received multicast protocol information. The correspondence of point sets. That is, after the interaction of the multicast protocol packet at each network edge node, the network edge node learns the network edge node information corresponding to each different virtual network.
  • Step 404 The network edge node encapsulates the data to be transmitted of the virtual network connected to the node, and sends the encapsulated packet to the network edge node in the network edge node set corresponding to the virtual network identifier of the virtual network.
  • Data packets of the data center with multicast and broadcast requirements are directly sent to the network edge node corresponding to the virtual network identifier of the data center in multicast mode, thereby completing packet broadcast, synchronization, and backup of the virtual network.
  • FIG. 5 is a schematic diagram of an extension of an MLD protocol according to an embodiment of the present invention.
  • MLD virtual network identification information
  • Report Report
  • the advertisement of the network edge node multicast protocol extension may select one of the bits in the reserved domain in the multicast protocol, and set 1 to indicate that the virtual network identifier information is extended subsequently.
  • the specific virtual network identifier information may be of different types.
  • the TLV form is presented. It is also possible to always define a virtual network tag information TLV, and then define different sub-TLVs or sub-sub-TLVs according to different virtual network identity types.
  • the MLD message is encapsulated in the ICMPv6 (Internet Control Message Protocol Version 6) protocol packet, and the indicator may be added to the IMDv6 message to indicate the subsequent MLD message. Carrying virtual network identification information.
  • FIG. 6 is a schematic diagram of an IGMP protocol extension according to an embodiment of the present invention.
  • the related reserved field may also be used to select one bit to indicate subsequent virtual network identification information; or a new field may be defined.
  • the IGMP query packet and the report packet can be added to the virtual network identifier information, or can be added only in the report (Report) packet. This is only an example.
  • FIG. 7 is a schematic diagram of an extension of a PIM protocol according to an embodiment of the present invention. As shown in FIG. 7, in the PIM join pruning message, a new type is added to identify that this is virtual network identification information, and the type value is assumed to be 6. The same specific information content can be identified in the form of TLV.
  • FIG. 8 is a schematic diagram of another MLD protocol extension according to an embodiment of the present invention.
  • a new TLV type in the MLD message indicates that the virtual network identifier information is carried, and a protocol field is used to indicate the type of the virtual network identifier information.
  • a protocol field is used to indicate the type of the virtual network identifier information.
  • different types of virtual network identification information content are identified by defining a sub-TLV form.
  • FIG. 9 is a schematic diagram of an information transmission apparatus according to an embodiment of the present invention.
  • the information transmission apparatus provided in this embodiment is applied to a network edge node, and includes: a package module, configured to encapsulate a virtual network identifier of the connected virtual network to the multicast when the virtual network is connected to the node.
  • the protocol packet is configured to send the multicast protocol packet to a network edge node other than the local node.
  • the transmitting module is further configured to receive, from the network edge node outside the node, a multicast protocol packet encapsulating the virtual network identifier.
  • the device further includes: an information management module, configured to determine, according to the received multicast protocol packet, a network edge node set corresponding to the virtual network identifier of the virtual network to which the node is connected.
  • an information management module configured to determine, according to the received multicast protocol packet, a network edge node set corresponding to the virtual network identifier of the virtual network to which the node is connected.
  • the transmission module is further configured to: send, by using a multicast manner, a packet encapsulated with a data to be transmitted of a virtual network connected to the node to a network in a network edge node set corresponding to the virtual network identifier of the virtual network. Edge node.
  • the virtual network identifier includes: a VxLAN network identifier, an NVGRE virtual subnet identifier, or an identifier capable of uniquely marking a virtual network.
  • the multicast protocol packet includes: an MLD packet, an IGMP packet, and a PIM packet.
  • the virtual network identifier is encapsulated in the multicast protocol packet in a TLV format.
  • the packet header of the multicast protocol packet carries a virtual network indication identifier, and is used to indicate whether the multicast protocol packet carries a virtual network identifier.
  • the embodiment of the present invention can implement the signaling propagation of the virtual network identifier in the network, so that the information management module can conveniently obtain the correspondence between each virtual network and its related network edge node set, so that the virtual network broadcasts or groups.
  • a broadcast packet needs to be propagated through the network, it can select an efficient multicast IP packet, a BIER packet, or a point-to-multipoint tunnel according to the corresponding relationship. Pass-through, with good adaptability and development prospects.
  • the embodiments of the present invention can easily implement various functions such as data broadcasting, synchronization, and backup of a virtual network (including a data center), implement an important function of the intermediate network to connect the virtual network, and expand the use and deployment scenarios of the data center.
  • the development of data centers, the development of SDN and NFV technologies, and the development of intermediate network technologies have all contributed to this.
  • the embodiment of the present application further provides a computer readable storage medium storing computer executable instructions, which are implemented when the computer executable instructions are executed.
  • the method according to the above embodiment can be implemented by means of software plus a necessary general hardware platform, and of course, by hardware, but in many cases, the former is A better implementation.
  • the technical solution of the present application which is essential or contributes to the related art, may be embodied in the form of a software product stored in a storage medium (such as ROM/RAM, disk, CD-ROM).
  • the instructions include a number of instructions for causing a terminal device (which may be a cell phone, a computer, a server, or a network device, etc.) to perform the methods described in various embodiments of the present application.
  • modules or steps of the present application can be implemented by a general-purpose computing device, which can be centralized on a single computing device or distributed over a network of multiple computing devices. They may be implemented by program code executable by the computing device such that they may be stored in the storage device for execution by the computing device and, in some cases, may be performed in a different order than that illustrated herein. Or the steps described, either separately as a single integrated circuit module, or as a single integrated circuit module. Thus, the application is not limited to any particular combination of hardware and software.
  • the embodiment of the present invention provides an information transmission method and device, which can implement signaling propagation of a virtual network identifier in a network, thereby implementing efficient transmission of virtual network data.

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Abstract

一种信息传输方法，包括：网络边缘节点在本节点连接有虚拟网络时，封装所连接的虚拟网络的虚拟网络标识至组播协议报文；网络边缘节点将所述组播协议报文发送给本节点之外的网络边缘节点。上述信息传输方法能够实现虚拟网络标识的传递，进而实现虚拟网络数据的高效传输。

Description

一种信息传输方法及装置 技术领域
本申请涉及但不限于通信领域，尤其涉及一种信息传输方法及装置。
背景技术
近年来，数据中心(DC，Data Center)作为虚拟网络的一种，得到了飞速发展，互联网也随之变化和发展。数据中心包罗万象，从最早的重要数据的灾难备份中心，到企业用户的机房建设，包括中国的托管业务和信息港服务，都在为数据中心提供相关的发展保障。数据中心是一整套复杂的设施。它不仅仅包括计算机系统和其它与之配套的设备(例如通信和存储系统)，还包含冗余的数据通信连接、环境控制设备、监控设备以及各种安全装置。企业级的数据中心的发展趋势是具备高度的灵活性和适应性，比如能根据外部需求做出快速变化。随着软件定义网络(SDN，Software Defined Network)技术和网络功能虚拟化(NFV，Network Function Virtualization)技术的发展，数据中心也在向着虚拟化的方向发展。因为数据中心的特点，数据中心面临的一个重要问题，就是"他们是虚拟化的孤岛"，虚拟化服务器、存储设备和网络都是分开管理的。如何在因特网上实现这些孤岛的互联，提供资源保障的服务，都是现在网络的重要发展方向。
数据中心内部、数据中心之间需要通过中间网络进行连接。中间网络一般包括现有的网络协议(IP，Internet Protocol)网络、多协议标签交换(MPLS，Multi Protocol Label Switch)网络、层三虚拟专用网(L3VPN，Layer 3Virtual Private Network)网络、基于位索引显示复制(BIER，Bit Indexed Explicit Replication)网络等。如何适配高效的数据中心连接，传递数据中心相关的各种信息和业务，都是当前热议的技术方向。数据中心内部的数据在通过网络传递时，会进行再一次的封装，在当前的技术发展下，虚拟可扩展局域网(VxLAN，Virtual Extensible Local Area Network)、利用通用路由封装实现网络虚拟化(NVGRE，Network Virtualization using GRE)、通用路由封装(GRE，Generic Routing Encapsulation)以及MPLS Over GRE等等，都是数据的封装 技术。网络边缘节点从中间网络收到带有这些封装标识的报文后，还原成原始的数据中心报文并发送到相应的数据中心网络中去。虚拟网络中例如数据中心，经常有很多数据需要通过广播或者组播的方式来发送，比如同步和备份数据，这样的数据现在可以通过封装技术封装后，通过单播隧道在网络中传输。但如何与已有的组播方法协同作用，让这些数据在中间网络中高效传输，还未有很好的解决方案。
发明内容
以下是对本文详细描述的主题的概述。本概述并非是为了限制权利要求的保护范围。
本申请提供一种信息传输方法及装置，能够实现虚拟网络标识的传递，进而实现虚拟网络数据的高效传输。
本申请提供一种信息传输方法，包括：网络边缘节点在本节点连接有虚拟网络时，封装所连接的虚拟网络的虚拟网络标识至组播协议报文；网络边缘节点将所述组播协议报文发送给本节点之外的网络边缘节点。
可选地，所述方法还包括：网络边缘节点从本节点之外的网络边缘节点接收封装有虚拟网络标识的组播协议报文。
其中，所述网络边缘节点从本节点之外的网络边缘节点接收封装有虚拟网络标识的组播协议报文之后，所述方法还包括：所述网络边缘节点根据收到的组播协议报文，确定本节点所连接的虚拟网络的虚拟网络标识对应的网络边缘节点集合。
其中，所述网络边缘节点根据收到的组播协议报文，确定本节点所连接的虚拟网络的虚拟网络标识对应的网络边缘节点集合之后，所述方法还包括：所述网络边缘节点通过组播方式发送封装有本节点所连接的虚拟网络的待传输数据的报文给该虚拟网络的虚拟网络标识对应的网络边缘节点集合中的网络边缘节点。
可选地，所述虚拟网络标识包括：虚拟可扩展局域网(VxLAN)网络标识、利用通用路由封装实现网络虚拟化(NVGRE)虚拟子网标识或者能够唯 一标记一虚拟网络的标识。
可选地，所述组播协议报文包括：组播侦听发现(MLD)报文、网络组管理协议(IGMP)报文、协议无关组播(PIM)报文。
本申请还公开一种信息传输装置，应用于网络边缘节点，包括：封装模块，设置为在本节点连接有虚拟网络时，封装所连接的虚拟网络的虚拟网络标识至组播协议报文；传输模块，设置为将所述组播协议报文发送给本节点之外的网络边缘节点。
可选地，所述传输模块，还设置为从本节点之外的网络边缘节点接收封装有虚拟网络标识的组播协议报文。
可选地，所述装置还包括：信息管理模块，设置为根据收到的组播协议报文，确定本节点所连接的虚拟网络的虚拟网络标识对应的网络边缘节点集合。
可选地，所述传输模块，还设置为通过组播方式发送封装有本节点所连接的虚拟网络的待传输数据的报文给该虚拟网络的虚拟网络标识对应的网络边缘节点集合中的网络边缘节点。
可选地，所述虚拟网络标识包括：虚拟可扩展局域网(VxLAN)网络标识、利用通用路由封装实现网络虚拟化(NVGRE)虚拟子网标识或者能够唯一标记一虚拟网络的标识。
可选地，所述组播协议报文包括：组播侦听发现(MLD)报文、网络组管理协议(IGMP)报文、协议无关组播(PIM)报文。
本申请实施例还提供一种计算机可读存储介质，存储有计算机可执行指令，所述计算机可执行指令被执行时实现上述的信息传输方法。
在本申请中，网络边缘节点在本节点连接有虚拟网络时，封装所连接的虚拟网络的虚拟网络标识至组播协议报文；网络边缘节点将所述组播协议报文发送给本节点之外的网络边缘节点。通过本申请可以实现虚拟网络标识在网络的信令传播，进而实现虚拟网络数据的高效传输。
而且，网络边缘节点根据收到的组播协议报文，确定本节点所连接的虚拟网络的虚拟网络标识对应的网络边缘节点集合。本申请通过确定每个虚拟 网络与其相关的网络边缘节点集合的对应关系，进而实现虚拟网络(包括数据中心)的数据广播、同步、备份等多种功能，实现中间网络联通虚拟网络的重要功能，如此，不仅拓展了数据中心的使用和部署场景，而且对数据中心的发展、SDN和NFV技术的发展以及中间网络技术的发展都有很好的促进作用。
在阅读并理解了附图和详细描述后，可以明白其他方面。
附图概述
图1为本发明实施例提供的信息传输方法的流程图；
图2为虚拟网络通过网络互联的示意图；
图3为虚拟网络的网络互联示意图；
图4为本发明实施例提供的信息传输方法的可选流程图；
图5为根据本发明实施例的MLD协议扩展示意图；
图6为根据本发明实施例的IGMP协议扩展示意图；
图7为根据本发明实施例的PIM协议扩展示意图；
图8为根据本发明实施例的另一种MLD协议扩展示意图；
图9为本发明实施例提供的信息传输装置的示意图。
本发明的实施方式
以下结合附图对本发明实施例进行详细说明，应当理解，以下所说明的实施例仅用于说明和解释本申请，并不用于限定本申请。
图1为本发明实施例提供的信息传输方法的流程图。如图1所示，本实施例提供的信息传输方法，包括以下步骤：
步骤101：网络边缘节点在本节点连接有虚拟网络时，封装所连接的虚拟网络的虚拟网络标识至组播协议报文；
步骤102：网络边缘节点将组播协议报文发送给本节点之外的网络边缘节点。
其中，该方法还包括：网络边缘节点从本节点之外的网络边缘节点接收封装有虚拟网络标识的组播协议报文。
其中，网络边缘节点从本节点之外的网络边缘节点接收封装有虚拟网络标识的组播协议报文之后，该方法还包括：网络边缘节点根据收到的组播协议报文，确定本节点所连接的虚拟网络的虚拟网络标识对应的网络边缘节点集合。
其中，所述网络边缘节点根据收到的组播协议报文，确定本节点所连接的虚拟网络的虚拟网络标识对应的网络边缘节点集合之后，该方法还包括：所述网络边缘节点通过组播方式发送封装有本节点所连接的虚拟网络的待传输数据的报文给该虚拟网络的虚拟网络标识对应的网络边缘节点集合中的网络边缘节点。
可选地，所述虚拟网络标识包括：VxLAN网络标识、NVGRE虚拟子网标识或者能够唯一标记一虚拟网络的标识。
可选地，所述组播协议报文包括：组播侦听发现(MLD，Multicast Listener Discover)报文、网络组管理协议(IGMP，Internet Group Management Protocol)报文、协议无关组播(PIM，Protocol Independent Multicast)报文。
可选地，所述虚拟网络标识以类型-长度-内容(TLV，Type-Length-Value)形式封装在所述组播协议报文中。
可选地，所述组播协议报文的报文头携带虚拟网络指示标识，用于指示所述组播协议报文是否携带虚拟网络标识。
图2为虚拟网络(如数据中心)通过网络互联的示意图。如图2所示，根据本发明实施例，网络边缘节点(Edge)1到Edge6，首先通过组播协议交互其所连的数据中心的虚拟网络标识，网络边缘节点1将会学习到，对于表示数据中心(DC)1封装的虚拟网络标识，对应网络边缘节点(Edge)3和网络边缘节点6的集合；同样，网络边缘节点2，将会通过组播协议交互学习到，对于表示数据中心2封装的虚拟网络标识，对应网络边缘节点4和网络边缘节点5的集合。
假设某个网络边缘节点同时连接多个虚拟网络，则会对不同的虚拟网络 标识分别管理其对应的网络边缘节点集合。该网络边缘节点在通告同时连接的多个虚拟网络标识时，可以将同类型的一个或多个虚拟网络标识封装在一个组播协议扩展中，也可以分不同的扩展呈现。本申请对此并不限定。此外，当某个网络边缘节点不再连接某个虚拟网络时，则通过组播协议信令宣告不再连接该虚拟网络，由此，将该网络边缘节点从该虚拟网络的虚拟网络标识所对应的网络边缘集合节点中删除。
图3为虚拟网络(如数据中心内部)的网络互联示意图。如图3所示，根据本发明实施例，同属于同一个数据中心内部的网络边缘设备，通过组播协议交互其所连的数据中心的虚拟网络标识，得到每个虚拟网络标识所对应的网络边缘节点集合。当数据中心有内容需要组播或者广播到对应的网络边缘节点集合时，可以直接通过组播方式进行高效传递。
于此，举例而言，在网络中的传输方式是封装在BIER报文中进行传输，BIER报文的目的地址(Dest)指明其他网络边缘节点包括边缘节点(Edge)2、Edge3、Edge4、Edge5和Edge6。这样经过中间BIER网络的传输后，组播协议信息到达其他的网络边缘节点。网络边缘节点互相之间通过该方式获取到了各自连接的虚拟网络信息。中间网络封装的方式，根据中间网络不同而可以有不同的封装形式，假设中间网络是MPLS网络，也可以封装在组播标签分配协议(mLDP，Multicast Label Distribution Protocol)和点到多点流量工程(P2MP TE，Point-to-Multipoint Traffic Engineering)隧道中进行传输。也可以定义特别的组播IP报文来传输组播协议报文。
图4为本发明实施例提供的信息传输方法的可选流程图。如图4所示，本实施例提供的信息传输方法包括以下步骤：
步骤401：网络边缘节点在本节点连接有虚拟网络时，封装所连接的虚拟网络的虚拟网络标识至组播协议报文。
步骤402：网络边缘节点通过组播协议扩展交互其所连的虚拟网络的虚拟网络标识。
步骤403：网络边缘节点根据收到的组播协议报文，确定本节点所连接的虚拟网络的虚拟网络标识对应的网络边缘节点集合。其中，网络边缘节点根据收到的组播协议信息，组织和生成虚拟网络标识与其对应的网络边缘节 点集合的对应关系。即通过组播协议报文在每个网络边缘节点的交互之后，网络边缘节点学习到对于每个不同的虚拟网络所对应的网络边缘节点信息。
步骤404：网络边缘节点封装本节点所连接的虚拟网络的待传输数据，通过组播方式将封装的报文发送给该虚拟网络的虚拟网络标识对应的网络边缘节点集合中的网络边缘节点。
对于有组播和广播需求的数据中心的数据报文，直接以组播方式发送给该数据中心的虚拟网络标识对应的网络边缘节点，从而完成虚拟网络的报文广播、同步和备份等多种功能。
图5为根据本发明实施例的MLD协议扩展示意图。如图5所示，在MLD报文头中，可以利用已有的保留(Reserved)字段，选择一位(bit)置1来表示后续有虚拟网络标识信息；如果考虑到兼容性或者其他方面，也可以定义新的字段来表示。另外，MLD的查询和报告报文，可以都对虚拟网络标识信息进行增加，也可以仅在报告(Report)报文中增加，这里仅是举例说明。
网络边缘节点组播协议扩展的通告，可以在组播协议中选择Reserved域中的其中一位(bit)，置1表示后续有虚拟网络标识信息的扩展，具体的虚拟网络标识信息可以以不同类型的TLV形式呈现。也可以总定义一个虚拟网络标记信息TLV，再根据不同虚拟网络标识类型，定义不同的sub-TLV或者sub-sub-TLV的方式来表现。可选地，由于MLD报文是封装在互联网控制信息协议版本六(ICMPv6，Internet Control Message Protocol Version 6)协议报文中，所以也可以在ICMPv6报文中增加指示标识表示后续的MLD报文中携带有虚拟网络标识信息。
图6为根据本发明实施例的IGMP协议扩展示意图。如图6所示，在IGMP报文头中，也可以利用相关的保留(Reserved)字段，选择一位(bit)置一来表示后续有虚拟网络标识信息；也可以定义新的字段来表示。并且，IGMP的查询报文和报告报文，可以都对虚拟网络标识信息进行增加，也可以仅在报告(Report)报文中增加，这里也仅是举例说明。
图7为根据本发明实施例的PIM协议扩展示意图。如图7所示，在PIM的加入剪枝消息中，新增类型来标识这是虚拟网络标识信息，这里假设类型值为6。同样具体信息内容可以用TLV形式来标识。
图8为根据本发明实施例的另一种MLD协议扩展示意图。如图8所示，在MLD消息中新增TLV类型表示携带有虚拟网络标识信息，协议(Protocol)字段用以表明虚拟网络标识信息的类型。虚拟网络标识信息内部，通过定义sub-TLV的形式来标识不同类型的虚拟网络标识信息内容。
图9为本发明实施例提供的信息传输装置的示意图。如图9所示，本实施例提供的信息传输装置，应用于网络边缘节点，包括：封装模块，设置为在本节点连接有虚拟网络时，封装所连接的虚拟网络的虚拟网络标识至组播协议报文；传输模块，设置为将所述组播协议报文发送给本节点之外的网络边缘节点。
可选地，所述传输模块，还设置为从本节点之外的网络边缘节点接收封装有虚拟网络标识的组播协议报文。
可选地，上述装置还包括：信息管理模块，设置为根据收到的组播协议报文，确定本节点所连接的虚拟网络的虚拟网络标识对应的网络边缘节点集合。
可选地，所述传输模块，还设置为通过组播方式发送封装有本节点所连接的虚拟网络的待传输数据的报文给该虚拟网络的虚拟网络标识对应的网络边缘节点集合中的网络边缘节点。
可选地，所述虚拟网络标识包括：VxLAN网络标识、NVGRE虚拟子网标识或者能够唯一标记一虚拟网络的标识。
可选地，所述组播协议报文包括：MLD报文、IGMP报文、PIM报文。
可选地，所述虚拟网络标识以TLV形式封装在所述组播协议报文中。
可选地，所述组播协议报文的报文头携带虚拟网络指示标识，用于指示所述组播协议报文是否携带虚拟网络标识。
此外，关于上述装置的具体过程同上述方法所述，故于此不再赘述。
综上可知，本发明实施例可以实现虚拟网络标识在网络的信令传播，使信息管理模块能够方便地获取到各虚拟网络与其相关的网络边缘节点集合的对应关系，使虚拟网络的广播或者组播报文需要经过网络封装传播时，能够根据该对应关系选择高效的组播IP报文、BIER报文或者点到多点隧道方式 进行传递，具有良好的适应性和发展前景。通过本发明实施例可以很容易地实现虚拟网络(包括数据中心)的数据广播、同步、备份等多种功能，实现中间网络联通虚拟网络的重要功能，拓展了数据中心的使用和部署场景，对数据中心的发展、SDN和NFV技术的发展以及中间网络技术的发展都有很好的促进作用。
此外，本申请实施例还提供一种计算机可读存储介质，存储有计算机可执行指令，所述计算机可执行指令被执行时实现上述的信息传输方法。
通过以上的实施方式的描述，本领域的技术人员可以清楚地了解到根据上述实施例的方法可借助软件加必需的通用硬件平台的方式来实现，当然也可以通过硬件，但很多情况下前者是更佳的实施方式。基于这样的理解，本申请的技术方案本质上或者说对相关技术做出贡献的部分可以以软件产品的形式体现出来，该计算机软件产品存储在一个存储介质(如ROM/RAM、磁碟、光盘)中，包括若干指令用以使得一台终端设备(可以是手机，计算机，服务器，或者网络设备等)执行本申请各个实施例所述的方法。
本领域的技术人员应该明白，上述的本申请的模块或步骤可以用通用的计算装置来实现，它们可以集中在单个的计算装置上，或者分布在多个计算装置所组成的网络上，可选地，它们可以用计算装置可执行的程序代码来实现，从而，可以将它们存储在存储装置中由计算装置来执行，并且在某些情况下，可以以不同于此处的顺序执行所示出或描述的步骤，或者将它们分别制作成单个集成电路模块，或者将它们中的多个模块或步骤制作成单个集成电路模块来实现。这样，本申请不限制于任何特定的硬件和软件结合。
以上显示和描述了本申请的基本原理和主要特征和本申请的优点。本申请不受上述实施例的限制，上述实施例和说明书中描述的只是说明本申请的原理，在不脱离本申请精神和范围的前提下，本申请还会有各种变化和改进，这些变化和改进都落入要求保护的本申请范围内。
工业实用性
本申请实施例提供一种信息传输方法及装置，可以实现虚拟网络标识在网络的信令传播，进而实现虚拟网络数据的高效传输。

Claims (12)

  1. 一种信息传输方法，包括：
    网络边缘节点在本节点连接有虚拟网络时，封装所连接的虚拟网络的虚拟网络标识至组播协议报文；
    所述网络边缘节点将所述组播协议报文发送给本节点之外的网络边缘节点。
  2. 如权利要求1所述的方法，所述方法还包括：所述网络边缘节点从本节点之外的网络边缘节点接收封装有虚拟网络标识的组播协议报文。
  3. 如权利要求2所述的方法，所述网络边缘节点从本节点之外的网络边缘节点接收封装有虚拟网络标识的组播协议报文之后，所述方法还包括：所述网络边缘节点根据收到的组播协议报文，确定本节点所连接的虚拟网络的虚拟网络标识对应的网络边缘节点集合。
  4. 如权利要求3所述的方法，所述网络边缘节点根据收到的组播协议报文，确定本节点所连接的虚拟网络的虚拟网络标识对应的网络边缘节点集合之后，所述方法还包括：所述网络边缘节点通过组播方式发送封装有本节点所连接的虚拟网络的待传输数据的报文给该虚拟网络的虚拟网络标识对应的网络边缘节点集合中的网络边缘节点。
  5. 如权利要求1至4任一项所述的方法，其中，所述虚拟网络标识包括：虚拟可扩展局域网VxLAN网络标识、利用通用路由封装实现网络虚拟化NVGRE虚拟子网标识或者能够唯一标记一虚拟网络的标识。
  6. 如权利要求1至4任一项所述的方法，其中，所述组播协议报文包括：组播侦听发现MLD报文、网络组管理协议IGMP报文、协议无关组播PIM报文。
  7. 一种信息传输装置，应用于网络边缘节点，包括：
    封装模块，设置为在本节点连接有虚拟网络时，封装所连接的虚拟网络的虚拟网络标识至组播协议报文；
    传输模块，设置为将所述组播协议报文发送给本节点之外的网络边缘节点。
  8. 如权利要求7所述的装置，其中，所述传输模块，还设置为从本节点之外的网络边缘节点接收封装有虚拟网络标识的组播协议报文。
  9. 如权利要求8所述的装置，所述装置还包括：信息管理模块，设置为根据收到的组播协议报文，确定本节点所连接的虚拟网络的虚拟网络标识对应的网络边缘节点集合。
  10. 如权利要求7所述的装置，其中，所述传输模块，还设置为通过组播方式发送封装有本节点所连接的虚拟网络的待传输数据的报文给该虚拟网络的虚拟网络标识对应的网络边缘节点集合中的网络边缘节点。
  11. 如权利要求7至10任一项所述的装置，其中，所述虚拟网络标识包括：虚拟可扩展局域网VxLAN网络标识、利用通用路由封装实现网络虚拟化NVGRE虚拟子网标识或者能够唯一标记一虚拟网络的标识。
  12. 如权利要求7至10任一项所述的装置，其中，所述组播协议报文包括：组播侦听发现MLD报文、网络组管理协议IGMP报文、协议无关组播PIM报文。
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