WO2014101708A1 - Data transmission method and network node in layer 2 network - Google Patents

Data transmission method and network node in layer 2 network Download PDF

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Publication number
WO2014101708A1
WO2014101708A1 PCT/CN2013/089936 CN2013089936W WO2014101708A1 WO 2014101708 A1 WO2014101708 A1 WO 2014101708A1 CN 2013089936 W CN2013089936 W CN 2013089936W WO 2014101708 A1 WO2014101708 A1 WO 2014101708A1
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Prior art keywords
interface
equalization
mac address
network node
interfaces
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PCT/CN2013/089936
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French (fr)
Chinese (zh)
Inventor
喻敬海
付振涛
韩辉
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中兴通讯股份有限公司
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Priority to CN201210574336.X priority Critical
Priority to CN201210574336.XA priority patent/CN103905325B/en
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 WO2014101708A1 publication Critical patent/WO2014101708A1/en

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    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00Data switching networks
    • H04L12/28Data switching networks characterised by path configuration, e.g. local area networks [LAN], wide area networks [WAN]
    • H04L12/2854Wide area networks, e.g. public data networks
    • H04L12/2856Access arrangements, e.g. Internet access
    • H04L12/2863Arrangements for combining access network resources elements, e.g. channel bonding
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00Data switching networks
    • H04L12/02Details
    • H04L12/16Arrangements for providing special services to substations
    • H04L12/18Arrangements for providing special services to substations for broadcast or conference, e.g. multicast
    • H04L12/1863Arrangements for providing special services to substations for broadcast or conference, e.g. multicast comprising mechanisms for improved reliability, e.g. status reports
    • H04L12/1868Measures taken after transmission, e.g. acknowledgments
    • H04L12/1872Measures taken after transmission, e.g. acknowledgments avoiding ACK or NACK implosion
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02DCLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00Reducing energy consumption in communication networks
    • Y02D30/50Reducing energy consumption in communication networks in wire-line communication networks, e.g. low power modes or reduced link rate

Abstract

Embodiments of the present invention relate to a data transmission method and a network node in a layer 2 network. The method comprises: configuring, according to a network architecture, a balance group for a network node on the basis of a principle for avoiding a broadcast storm, one balance group comprising one or more interfaces; the network node receiving a packet from a receiving interface; and the network node forwarding the packet to an interface excluding the balance group the receiving interface is located.

Description

二层网络数据传送方法及网络节点  Layer 2 network data transmission method and network node
技术领域 Technical field
本发明涉及网络通信技术, 更具体的说, 是一种二层网络数据传送方法 及网络节点。  The present invention relates to network communication technologies, and more particularly to a layer 2 network data transmission method and network node.
背景技术 Background technique
随着互联网应用的日益广泛, 数据中心的应用也日益广泛。 在相关的标 准组织中, 各种与数据中心相关的技术标准也在积极推进中。 为了能够在数 据中心网络中实现比较方便的虚拟机动态迁移, 要求数据中心网络为大二层 网络成为构建数据中心的基本要求。  With the increasing use of Internet applications, data center applications are becoming more widespread. In the relevant standards organizations, various technical standards related to data centers are also actively promoted. In order to enable more convenient virtual machine dynamic migration in the data center network, the data center network is required to become a basic requirement for building a data center.
在二层网络中, 为了提高网络连接的可靠性和健壮性, 通常在组网上存 在冗余, 以便发生故障时, 流量能切换到备份链路上。 但是, 冗余链路的存 在导致在网络中天然存在着环路, 进而导致网络中出现广播风暴, 造成流量 拥塞等各种问题。 STP ( Spanning Tree Protocol, 生成树协议)及其后续改进 协议可以在网络节点之间通过改变设备节点的端口状态来避免环路的出现, 同时在链路出现故障时, 通过改变设备端口状态使数据转发通过其它的可达 链路进行转发, 保证网络数据传送的继续。 但 STP及其后续改进协议在数据 中心应用中有着其致命弱点, 就是带宽利用率严重不足, 大量链路因为端口 被该协议阻塞而无法使用。为此,业界提出了若干种相关的技术来实现无 STP 的大二层网络, 目前讨论比较多的分别是 IRF ( Intelligent Resilient Framework , 智能弹性架构)、 VSS ( Virtual Switching System,虚拟交换系统)、 VPC ( virtual Port-Channel, 虚通道技术 ) 、 TRILL ( Transparent Interconnection of Lots of Links, 多链路透明互联 )技术和 SPB ( Shortest Path Bridging, 最短路径桥接 ) 技术。  In a Layer 2 network, in order to improve the reliability and robustness of the network connection, redundancy is usually present on the group network, so that when a failure occurs, traffic can be switched to the backup link. However, the existence of redundant links leads to natural loops in the network, which leads to broadcast storms in the network, causing traffic congestion and other problems. STP (Spanning Tree Protocol) and its subsequent improvement protocol can avoid loops by changing the port state of device nodes between network nodes. At the same time, when the link fails, data is changed by changing the state of the device port. Forwarding is forwarded through other reachable links to ensure the continuation of network data transmission. However, STP and its subsequent improved protocols have their Achilles heel in data center applications, that is, bandwidth utilization is seriously insufficient, and a large number of links cannot be used because the ports are blocked by the protocol. To this end, the industry has proposed several related technologies to implement a large Layer 2 network without STP. The current discussion is more about IRF (Intelligent Resilient Framework), VSS (Virtual Switching System), VPC (Virtual Port-Channel), TRILL (Transparent Interconnection of Lots of Links) technology, and SPB (Shortest Path Bridging) technology.
IRF技术、 VSS和 VPC技术, 均为堆叠类技术实现方案。 IRF技术是一 种应用在中低端交换机设备上的虚拟化技术。 它可以将多台中低端交换机设 备(成员设备)虚拟为一台高端交换机设备(虚拟设备) 。 同时, 各个成员 设备的物理端口被捆绑在一起, 作为一个逻辑端口使用, 在配置和组网使用 上与单个实际物理设备相类似, 由此可实现跨设备链路聚合功能, 这样也避 免了环路的发生, 同时增加了链路的健壮性。 从数据中心的组网图上来看, 使用 IRF聚合后的网络结构相当于一个树形结构,环路发生的条件不再存在。 IRF技术需要在被虚拟的成员设备上启用 IRF控制协议, 并在各虚拟成员设 备之间交互协议报文。 IRF technology, VSS and VPC technologies are all stacking technology implementations. IRF technology is a virtualization technology applied to low-end switch devices. It can virtualize multiple low-end switch devices (member devices) into a high-end switch device (virtual device). At the same time, the physical ports of each member device are bundled together, used as a logical port, used in configuration and networking. It is similar to a single physical device, which enables cross-device link aggregation, which also avoids the occurrence of loops and increases the robustness of the link. From the networking diagram of the data center, the network structure after IRF aggregation is equivalent to a tree structure, and the conditions for loop occurrence no longer exist. The IRF technology needs to enable the IRF control protocol on the virtual member devices and exchange protocol packets between the virtual member devices.
TRILL技术与 SPB技术, 均为实现数据转发方面多路径的技术。 TRILL 技术是由 IETF提出的一种 "以太帧多路径转发"技术方案, 该技术的提出颠 覆了传统以太帧的转发方式。 因为多路径技术从来就是三层 IP才有的技术。 TRILL将此技术应用在二层交换机设备上,能够实现此功能的交换机称为 "路 由桥( Routing Bridge ,简称 RBridge ) "。 RBridge间通过类似 IS-IS ( Intermediate System to Intermediate System Routing Protocol, 中间系统到中间系统的路由选 择协议)路由协议的链路状态控制协议 TRILL (Transparent Interconnection of Lots of Links, 多链接半透明互联) IS-IS实现相互间最短路径和等价多路径的 计算。 TRILL IS-IS只计算 RBridge间的拓朴, 而不关心网络中两台主机间的 拓朴。 在转发以太帧的时候, Ingress RBridge (入口路由桥)在以太帧上加封 装源 RBridge标识和目的 RBridge标识, 再加封装外层 VLAN标识, 外层下 一跳 RBridge标识,这样逐跳转发到 Egress RBridge(出口路由桥)节点, Egress RBridge将 TRILL头剥掉, 还原出传统的以太帧, 进行传统的以太帧转发。 通过使用具有此种技术特性的交换机设备构建数据中心网络, 实现了没有环 路没有 STP的大二层网络。 但通过此种技术实现大二层网络, 要求所使用的 交换机设备必须能够支持此种技术 , 且原有交换机不能通过简单的软件升级 来支持。 发明内容  Both TRILL and SPB technologies are technologies that implement multipathing in data forwarding. TRILL technology is a "Ethernet frame multi-path forwarding" technical solution proposed by the IETF. The proposed technology subverts the traditional Ethernet frame forwarding mode. Because multipath technology has always been a technology that is only available in Layer 3 IP. TRILL applies this technology to Layer 2 switch devices. The switch that can implement this function is called the "Routing Bridge" (RBridge). Link state control protocol (TRILL (Transparent Interconnection of Lots of Links) IS) between RBridge and the IS-IS (Intermediate System to Intermediate System Routing Protocol) routing protocol -IS implements the calculation of the shortest path and equivalent multipath between each other. TRILL IS-IS only calculates the topology between RBridges, and does not care about the topology between the two hosts on the network. When forwarding the Ethernet frame, the Ingress RBridge adds the encapsulation source RBridge identifier and the destination RBridge identifier to the Ethernet frame, and encapsulates the outer VLAN identifier and the outer hop RBridge identifier, so that the hop is forwarded to the hop by hop. Egress RBridge (Egress RBridge) node, Egress RBridge strips the TRILL header, restores the traditional Ethernet frame, and performs traditional Ethernet frame forwarding. By constructing a data center network using a switch device having such technical characteristics, a large Layer 2 network without loops without STP is realized. However, implementing a large Layer 2 network through this technology requires that the switch equipment used must be able to support this technology, and the original switch cannot be supported by a simple software upgrade. Summary of the invention
本发明实施例是提供一种二层网络数据传送方法及网络节点, 以解决二 层网络中容易出现广播风暴的问题。  The embodiments of the present invention provide a Layer 2 network data transmission method and a network node, so as to solve the problem that a broadcast storm is likely to occur in a Layer 2 network.
本发明实施例提供了一种二层网络数据传送方法, 包括:  The embodiment of the invention provides a method for data transmission of a layer 2 network, including:
根据网络架构以避免广播风暴为原则为网络节点配置均衡组, 一个均衡 组包括一个或多个接口; 网络节点从接收接口接收 ^艮文; 以及 Configuring an equalization group for the network node according to the network architecture to avoid broadcast storms, and one equalization group includes one or more interfaces; The network node receives the message from the receiving interface;
所述网络节点向所述接收接口所在均衡组之外的接口转发报文。  The network node forwards the packet to an interface other than the equalization group where the receiving interface is located.
本发明实施例提供了一种网络节点, 该网络节点包括:  An embodiment of the present invention provides a network node, where the network node includes:
若干个接口;  Several interfaces;
均衡组配置单元, 其设置成根据网络架构以避免广播风暴为原则为网络 节点配置均衡组, 一个均衡组包括一个或多个接口; 以及  a balancing group configuration unit configured to configure a balancing group for the network node according to a network architecture to avoid a broadcast storm, and one equalization group includes one or more interfaces;
报文转发控制模块, 从接收接口接收报文时, 其设置成向所述接收接口 所在均衡组之外的接口转发报文。  The packet forwarding control module is configured to forward the packet to the interface other than the equalization group where the receiving interface is located when receiving the packet from the receiving interface.
本发明实施例的方法和网络节点因预先根据网络架构以避免广播风暴为 原则为网络节点配置均衡组, 进行报文转发时, 根据预置的均衡组向接收接 口所在的均衡组以外的所有其他接口转发报文即可有效避免广播风暴, 本发 明实施例的方案只需要进行设置, 对节点设备的要求较低, 且容易实现。 另 夕卜, 在需要进行 MAC ( Media Access Control, 介质访问控制)地址学习和更 新时, 同一均衡组的接口根据均衡策略实现了 MAC地址学习的分担, 提高 了系统的性能。 附图概述  The method and the network node in the embodiment of the present invention configure the equalization group for the network node according to the network architecture in advance to avoid the broadcast storm. When the packet is forwarded, all the other groups except the equalization group where the receiving interface is located according to the preset equalization group are performed. The interface can forward the packet to avoid broadcast storms. The solution of the embodiment of the present invention only needs to be set, and the requirements on the node device are low and easy to implement. In addition, when the MAC (Media Access Control) address learning and updating is required, the interface of the same equalization group implements the sharing of MAC address learning according to the equalization policy, thereby improving the performance of the system. BRIEF abstract
图 1是本发明二层网络数据传送方法实施例 1的示意图;  1 is a schematic diagram of Embodiment 1 of a Layer 2 network data transmission method according to the present invention;
图 2是本发明实施例的均衡组配置的示意图;  2 is a schematic diagram of an equalization group configuration according to an embodiment of the present invention;
图 3是本发明二层网络数据传送方法实施例 2的示意图;  3 is a schematic diagram of Embodiment 2 of a Layer 2 network data transmission method according to the present invention;
图 4是本发明实施例进行 MAC处理的示意图;  4 is a schematic diagram of performing MAC processing according to an embodiment of the present invention;
图 5是进行 MAC学习的具体流程示意图;  FIG. 5 is a schematic diagram of a specific process for performing MAC learning;
图 6-8是本发明实施例的网络节点实施例的模块结构示意图;  6-8 are schematic structural diagrams of modules of an embodiment of a network node according to an embodiment of the present invention;
图 9-11是本发明应用实例的示意图; 其中, 图 9是本发明实施例在标准 胖树结构下转发及 MAC学习示意图; 图 10是本发明实施例的非标准胖树结 构下转发及 MAC学习示意图; 图 11是本发明实施例在一种组播情况下转发 及 MAC学习示意图。 本发明的较佳实施方式 9-11 are schematic diagrams of an application example of the present invention; wherein FIG. 9 is a schematic diagram of forwarding and MAC learning in a standard fat tree structure according to an embodiment of the present invention; FIG. 10 is a forwarding and MAC of a non-standard fat tree structure according to an embodiment of the present invention; FIG. 11 is a schematic diagram of forwarding and MAC learning in a multicast case according to an embodiment of the present invention. Preferred embodiment of the invention
下面结合附图和具体实施例对本发明实施例所述技术方案作详细描述, 以使本领域的技术人员可以更好的理解本发明实施例并能予以实施, 但所举 实施例不作为对本发明的限定。 需要说明的是, 在不冲突的情况下, 本申请 中的实施例及实施例中的特征可以相互组合。  The technical solutions of the embodiments of the present invention are described in detail below with reference to the accompanying drawings and specific embodiments, so that those skilled in the art can understand the embodiments of the present invention and can be implemented, but the embodiments are not Limited. It should be noted that the embodiments in the present application and the features in the embodiments may be combined with each other without conflict.
实施例 1  Example 1
本发明二层网络数据传送方法实施例 1 , 如图 1所示, 该方法包括: 步骤 101 : 根据网络架构以避免广播风暴为原则为网络节点配置均衡组, 一个均衡组包括一个或多个接口;  Embodiment 1 of the Layer 2 network data transmission method of the present invention, as shown in FIG. 1, the method includes: Step 101: Configure a balance group for a network node according to a network architecture to avoid a broadcast storm, and one equalization group includes one or more interfaces. ;
本发明实施例所说的网络节点可以是网络接入设备及聚合设备或网络核 心设备, 为更好的描述本发明实施例的内容, 本文引入以下概念定义:  The network node in the embodiment of the present invention may be a network access device and an aggregation device or a network core device. To better describe the content of the embodiment of the present invention, the following concept definition is introduced:
上行接口: 数据中心网络结构中, 与上层网络节点交互的接口, 为该层 网络节点的上行接口。  Uplink interface: In the data center network structure, the interface that interacts with the upper-layer network node is the uplink interface of the layer network node.
下行接口: 数据中心网络结构中, 与下层网络节点交互的接口, 为该层 网络节点的下行接口。  Downlink interface: In the data center network structure, the interface that interacts with the lower layer network node is the downlink interface of the layer network node.
本发明实施例中, 均衡组内的接口均为用于与上层网络设备交互的上行 接口或均为用于与下层网络节点交互的下行接口。  In the embodiment of the present invention, the interfaces in the equalization group are all uplink interfaces used for interaction with the upper layer network device or downlink interfaces used for interaction with the lower layer network node.
均衡组: 也可称为接口组或端口组, 以避免广播风暴为原则将相同类型 的接口 (上行接口或者下行接口或者上行接口或下行接口的一部分接口) , 捆绑到一起, 阻止组内接口收到的流量向组内别的接口转发, 同时进行 MAC 地址学习的分担或者流量分担, 以及进行流量保护。 类似链路捆绑, 但是不 需要协议协商, 且是本地单独存在, 不需要和对端有相同的均衡组。  Equilibrium group: It can also be called an interface group or a port group to avoid the broadcast storm. The same type of interface (the uplink interface or the downlink interface or a part of the uplink interface or the downlink interface) is bundled together to prevent the intra-group interface from being received. The traffic is forwarded to other interfaces in the group. At the same time, MAC address learning is shared or traffic is shared, and traffic protection is performed. Similar to link bundling, but no protocol negotiation is required, and it exists locally and does not need to have the same equalization group as the peer.
其中, 流量分担是通过在均衡组的端口上均匀的学习对端 MAC,后续从 均衡组往外部转发时, 自然查表, 业务 MAC基本均衡, 可以认为体现了流 量分担。  Traffic balancing is performed by learning the peer MAC evenly on the ports of the equalization group. When the packets are forwarded from the equalization group to the outside, the traffic is naturally checked and the service MAC is basically balanced.
对于一个确定的以太网多链路环境中的网络节点, 它的接口或为上行接 口, 或为下行接口, 上行接口使用 U-P表示, 下行接口使用 D-P表示; 在上行接口或下行接口中, 可以根据需要配置均衡组。 如图 2所示, 均 衡组包括了全部的上行接口或包括了全部的下行接口, 在实际的组网中, 均 衡组可以只包括一部分上行接口或只包括一部分下行接口。 其中, 若网络节 点为网络接入设备及聚合设备, 则可配置上行接口为一个均衡组; 若网络节 点为网络核心设备, 则根据该网路核心设备所连接的聚合设备的拓朴情况配 置均衡组。 For a network node in a certain Ethernet multi-link environment, its interface is either an uplink interface or a downlink interface, the uplink interface is represented by UP, and the downlink interface is represented by DP; On the uplink or downlink interface, you can configure an equalization group as required. As shown in FIG. 2, the equalization group includes all the uplink interfaces or all the downlink interfaces. In the actual networking, the equalization group may include only a part of the uplink interfaces or only a part of the downlink interfaces. If the network node is a network access device and an aggregation device, the uplink interface can be configured as an equalization group. If the network node is a network core device, the interface is balanced according to the topology of the aggregation device connected to the network core device. group.
步骤 102: 网络节点从接收接口接收报文;  Step 102: The network node receives the packet from the receiving interface.
本发明实施例所说的报文主要是需要洪泛的报文, 如广播报文、 协议报 文或未知广播报文。 对于单播报文, 则需要查找转发表, 向对应的端口转发, 不会向所有的端口转发。  The packet in the embodiment of the present invention is mainly a packet that needs to be flooded, such as a broadcast packet, a protocol packet, or an unknown broadcast packet. For unicast packets, you need to look up the forwarding table and forward it to the corresponding port. It will not forward to all ports.
步骤 103 : 所述网络节点向所述接收接口所在均衡组之外的接口转发报 文。  Step 103: The network node forwards the packet to an interface other than the equalization group where the receiving interface is located.
该实施例 1 中, 同一均衡组接口收到的报文, 不再向该接收接口所在均 衡组内别的接口转发, 若一个均衡组包括了所有的上行接口, 则从上行接口 接收的广播 /组播或未知单播报文, 不再向另外的上行接口转发。 因预先根据 网络架构以避免广播风暴为原则为网络节点配置均衡组, 进行报文转发时, 根据预置的均衡组向接收接口所在的均衡组以外的所有其他接口转发报文即 可有效避免环路产生, 也即避免了广播风暴, 本发明实施例的方案只需要进 行设置, 对节点设备的要求较低, 且容易实现。  In the first embodiment, the packets received by the interface of the same equalization group are not forwarded to other interfaces in the equalization group where the receiving interface is located. If an equalization group includes all the uplink interfaces, the broadcast received from the uplink interface is Multicast or unknown unicast packets are no longer forwarded to another upstream interface. The network node is configured with an equalization group based on the network architecture to prevent the broadcast storm. In the case of packet forwarding, packets are forwarded according to the preset equalization group to all interfaces except the equalization group where the receiving interface is located. The solution is generated, that is, the broadcast storm is avoided. The solution of the embodiment of the present invention only needs to be set, and the requirements for the node device are low, and are easy to implement.
实施例 2 Example 2
本发明二层网络数据传送方法实施例 2, 如图 3所示, 该方法包括: 步骤 301 : 根据网络架构以避免广播风暴为原则为网络节点配置均衡组, 一个均衡组包括一个或多个接口;  Embodiment 2 of the Layer 2 network data transmission method of the present invention, as shown in FIG. 3, the method includes: Step 301: Configure a balance group for a network node according to a network architecture to avoid a broadcast storm, and one equalization group includes one or more interfaces. ;
所述均衡组内的接口均为用于与上层网络节点交互的上行接口或均为用 于与下层网络节点交互的下行接口。  The interfaces in the equalization group are all uplink interfaces for interacting with upper network nodes or downlink interfaces for interacting with lower layer network nodes.
步骤 302: 网络节点从接收接口接收报文;  Step 302: The network node receives the packet from the receiving interface.
步骤 303: 网络节点根据报文中的 MAC ( Media Access Control, 介质访 问控制)信息进行 MAC处理; Step 303: The network node according to the MAC in the message (Media Access Control, media access) Ask control) information for MAC processing;
具体地, 如图 4所示, MAC处理包括:  Specifically, as shown in FIG. 4, the MAC processing includes:
步骤 401 : 所述网络节点根据报文中携带的 MAC信息查询本地 MAC地 址表;  Step 401: The network node queries a local MAC address table according to the MAC information carried in the packet.
步骤 402: 如未查到匹配的地址表项, 则所述网络节点进行 MAC地址学 习;  Step 402: If no matching address entry is found, the network node performs MAC address learning;
所述 MAC地址学习的步骤包括: 判断所述接收接口所在的均衡组是否 还有其他接口;  The step of learning the MAC address includes: determining whether the equalization group in which the receiving interface is located has other interfaces;
若没有其他接口, 则所述接收接口执行 MAC地址学习;  If there is no other interface, the receiving interface performs MAC address learning;
若有其他接口, 则根据负载均衡策略选择所述接收接口所在的均衡组内 的接口执行所述 MAC地址学习。  If there are other interfaces, the interface in the equalization group in which the receiving interface is located is selected according to the load balancing policy to perform the MAC address learning.
步骤 403: 如查到匹配的地址表项, 则所述网络节点判断是否符合 MAC 地址更新条件;  Step 403: If a matching address entry is found, the network node determines whether the MAC address update condition is met.
所述 MAC地址更新的条件包括:  The conditions for the MAC address update include:
条件 A: 匹配的地址表项中的接口是与所述接收接口位于同一均衡组; 条件 B: 匹配的地址表项中的接口与所述接收接口位于不同的均衡组且 不是同一类型的接口; 或  Condition A: The interface in the matched address entry is in the same equalization group as the receiving interface; Condition B: the interface in the matched address entry is in a different equalization group than the receiving interface and is not the same type of interface; Or
条件 C, 匹配的地址表项中的接口与所述接收接口位于不同的均衡组, 但属于同一类型的接口, 且所述网络节点支持虚拟机迁移。  Condition C: The interface in the matched address entry is in a different equalization group than the receiving interface, but belongs to the same type of interface, and the network node supports virtual machine migration.
步骤 404: 判断符合 MAC地址更新条件时, 所述网络节点进行 MAC地 址更新。  Step 404: When it is determined that the MAC address update condition is met, the network node performs MAC address update.
满足 MAC地址更新条件 A时, 所述网络节点根据负载均衡策略选择所 述接收接口所在的均衡组内的接口执行 MAC地址更新;满足 MAC地址更新 条件 B、 C时, 所述网络节点的接收接口执行 MAC地址更新(即接收报文的 接口后学习的 MAC地址生效, 同时删除原有接口学习的 MAC地址)。  When the MAC address update condition A is satisfied, the network node selects an interface in the equalization group in which the receiving interface is located to perform MAC address update according to the load balancing policy; and when the MAC address update condition B and C is satisfied, the receiving interface of the network node The MAC address is updated (that is, the MAC address learned after the interface that receives the packet takes effect, and the MAC address learned by the original interface is deleted).
步骤 304: 所述网络节点向所述接收接口所在均衡组之外的其他接口转 发报文。 在以上实施例 2中, 网络节点的接口及所配置的均衡组遵守以下规则:Step 304: The network node forwards the packet to other interfaces except the equalization group where the receiving interface is located. In the above Embodiment 2, the interface of the network node and the configured equalization group comply with the following rules:
A、 同一均衡组接口收到的报文, 不再向该接收接口所在均衡组内别的 接口转发, 若一个均衡组包括了所有的上行接口, 则从上行接口接收的广播 / 组播或未知单播报文, 不再向另外的上行接口转发。 A. The packets received by the same interface are not forwarded to other interfaces in the equalization group. If an equalization group includes all uplink interfaces, the broadcast/multicast or unknown received from the uplink interface. A unicast packet is no longer forwarded to another upstream interface.
B、 如已有与接收报文的接口相同类型接口学习到的 MAC地址, 且所在 网络节点不支持虚拟机迁移, 那么接口报文的接口不再进行 MAC地址学习。  B. If the MAC address learned by the interface of the same type as the interface that receives the packet is available, and the network node does not support VM migration, the interface of the interface packet does not learn MAC address.
C、 如已有与接收报文的接口同一均衡组接口学习到的 MAC地址, 可以 根据均衡策略来让合适的接口 (比如负载少的接口) 学习。  C. If the MAC address learned by the same balanced group interface as the interface that receives the packet is already available, you can learn the appropriate interface (such as the interface with less load) according to the balancing policy.
E、 已有不同类型接口学习到的 MAC, 接收报文的接口后学的 MAC地 址生效, 同时删除原有接口学习的 MAC地址。  E. The MAC address learned by the interface of different types is valid. The MAC address learned after the interface that receives the packet takes effect, and the MAC address learned by the original interface is deleted.
因预先根据网络架构以避免广播风暴为原则为网络节点配置均衡组, 进 行报文转发时, 根据预置的均衡组向接收接口所在的均衡组以外的所有其他 接口转发报文即可有效避免环路产生, 也即避免了广播风暴, 本发明实施例 的方案只需要进行设置, 对节点设备的要求较低, 且容易实现。 另外, 在需 要进行 MAC 地址学习和更新时, 同一均衡组的接口根据均衡策略实现了 MAC地址学习的分担, 提高了系统的性能。  The network node is configured with an equalization group based on the network architecture to prevent the broadcast storm. In the case of packet forwarding, packets are forwarded according to the preset equalization group to all interfaces except the equalization group where the receiving interface is located. The solution is generated, that is, the broadcast storm is avoided. The solution of the embodiment of the present invention only needs to be set, and the requirements for the node device are low, and are easy to implement. In addition, when MAC address learning and update are required, the interface of the same equalization group implements the sharing of MAC address learning according to the equalization policy, which improves the performance of the system.
在以上实施例 1和 2中,某接口故障(如,断链 ) ,可以将此接口的 MAC 表转移到与故障接口同一均衡组的其他接口。  In the above embodiments 1 and 2, if an interface fails (for example, a broken link), the MAC table of the interface can be transferred to another interface of the same equalization group as the faulty interface.
基于本发明实施例的方案, 当一个网络节点接收到以太报文, 根据所述 报文携带的 MAC ( Media Access Control, 介质访问控制)信息, 进行 MAC 查找和 MAC学习; According to the solution of the embodiment of the present invention, when a network node receives an Ethernet packet, performs MAC lookup and MAC learning according to MAC (Media Access Control) information carried in the packet;
所述节点首先根据所述报文的 MAC信息查找本地 MAC表是否已有所述 MAC信息, 查找所在均衡组是否有其他接口, 查找均衡组内是否已有接口学 到所述 MAC信息;  The node first searches whether the local MAC table has the MAC information according to the MAC information of the packet, and finds whether there is another interface in the equalization group, and finds whether the interface has learned the MAC information in the equalization group;
若所在均衡组没有其他接口, 则接收报文的接口根据 MAC 学习规则进 行 MAC 学习或更新; 若所在均衡组有其他接口, 根据均衡组配置策略进行 MAC学习或处理; 另外, 不同类型接口学习到的 MAC, 则后学习的 MAC生效, 同时删除 原有接口的学习的 MAC。 If there is no other interface in the EQ group, the interface that receives the packet performs MAC learning or update according to the MAC learning rule. If there are other interfaces in the EQ group, MAC learning or processing is performed according to the EQ group configuration policy. In addition, the MAC learned by different types of interfaces takes effect after the MAC learned, and the learned MAC of the original interface is deleted.
在网络节点中的进行 MAC学习的具体流程如图 5所示, 本流程是上述 规则的具体体现, 其步骤说明如下:  The specific process of MAC learning in the network node is shown in Figure 5. This process is a concrete embodiment of the above rules. The steps are as follows:
步骤 501 : 网络节点接收到以太报文;  Step 501: The network node receives the Ethernet packet.
步骤 502: 所述节点分析所接收到的报文, 获取其 MAC地址以及接收所 述报文的接口信息;  Step 502: The node analyzes the received packet, obtains its MAC address, and receives interface information of the packet.
步骤 503: 所述节点查询本节点的 MAC表信息;  Step 503: The node queries the MAC table information of the local node.
步骤 504: 根据所查询的 MAC表信息结果, 判断是否已有对应报文中 MAC的地址表项; 若无, 继续处理; 否则, 转到步骤 508;  Step 504: Determine, according to the result of the queried MAC table information, whether there is an address entry of the MAC in the corresponding packet; if not, continue processing; otherwise, go to step 508;
步骤 505: 所述节点的 MAC表中没有对应所述 MAC的地址表项, 分析 接收报文的接口是否所在的均衡组是否还有其他接口;若无,则执行步骤 506; 否则, 转到步骤 507;  Step 505: The MAC address table of the node does not have an address entry corresponding to the MAC, and analyzes whether the interface that receives the packet has another interface. If not, step 506 is performed; otherwise, go to step 507;
步骤 506: 所述节点的接收报文的接口学习报文所携带的 MAC地址, 加 入 MAC地址表项, 流程结束;  Step 506: The MAC address carried in the interface learning packet of the received packet of the node is added to the MAC address entry, and the process ends.
步骤 507: 根据负载均衡策略选择所述接收接口所在的均衡组内的接口 学习报文所携带的 MAC地址; 学习完毕流程结束;  Step 507: Select, according to the load balancing policy, the MAC address carried in the learning packet of the interface in the equalization group where the receiving interface is located; the learning completion process ends;
步骤 508:分析比较已有 MAC地址条目中接口信息与接收报文的接口是 否处于同一个均衡组中; 若相同, 则执行步骤 509; 否则, 转到步骤 511 ; 步骤 509: 判断两个接口是否属于相同类型的接口, 若不是相同类型的 接口, 则转到执行步骤 511 , 否则, 执行步骤 510;  Step 508: Analyze whether the interface information of the existing MAC address entry and the interface of the received message are in the same equalization group; if they are the same, go to step 509; otherwise, go to step 511; Step 509: Determine whether the two interfaces are The interface of the same type, if it is not the same type of interface, go to step 511, otherwise, go to step 510;
步骤 510: 判断所属网络节点是否支持虚拟机迁移技术, 若支持, 则执 行步骤 511 , 否则, 因原接口中已存在所述 MAC信息, 新接口不再学习, 流 程结束;  Step 510: Determine whether the network node supports the virtual machine migration technology. If yes, go to step 511. Otherwise, the new interface does not learn because the MAC address already exists on the original interface, and the process ends.
步骤 511 : 根据负载均衡策略选择所述接收接口所在的均衡组内的接口 更新 MAC地址表中相关信息。 为了实现上述方法, 本发明实施例还提供了一种网络节点, 如图 6所示, 该网络节点包括: Step 511: Select an interface in the equalization group in which the receiving interface is located to update related information in the MAC address table according to the load balancing policy. In order to implement the foregoing method, the embodiment of the present invention further provides a network node. As shown in FIG. 6, the network node includes:
若干个接口;  Several interfaces;
均衡组配置单元 11 , 用于根据网络架构以避免广播风暴为原则为网络节 点配置均衡组, 一个均衡组包括一个或多个接口; 以及  The equalization group configuration unit 11 is configured to configure an equalization group for the network node according to the network architecture to avoid the broadcast storm, and one equalization group includes one or more interfaces;
所述均衡组内的接口均为用于与上层网络设备交互的上行接口或均为用 于与下层网络设备交互的下行接口。  The interfaces in the equalization group are both uplink interfaces for interacting with upper layer network devices or downlink interfaces for interacting with lower layer network devices.
报文转发控制模块 12, 从接收接口接收报文时, 用于向所述接收接口所 在均衡组之外的其他接口转发报文。  The packet forwarding control module 12 is configured to forward the packet to the interface other than the equalization group of the receiving interface when receiving the packet from the receiving interface.
对应于实施例 2, 如图 7所示, 所述网络节点还包括:  Corresponding to Embodiment 2, as shown in FIG. 7, the network node further includes:
MAC地址查询单元 13 ,用于根据报文中携带的 MAC信息查询本地 MAC 地址表;  The MAC address query unit 13 is configured to query the local MAC address table according to the MAC information carried in the packet.
MAC地址管理单元 14, 用于在未查到匹配的地址表项时, 控制相应接 口进行 MAC地址学习, 以及在判断符合 MAC地址更新条件时, 控制相应接 口进行 MAC地址更新;  The MAC address management unit 14 is configured to control the corresponding interface to perform MAC address learning when the matching address entry is not found, and control the corresponding interface to perform MAC address update when determining that the MAC address update condition is met;
MAC地址更新判断单元 15, 用于在查到匹配的地址表项时, 判断是否 符合 MAC地址更新条件。  The MAC address update determining unit 15 is configured to determine whether the MAC address update condition is met when the matching address entry is found.
可选地, 如图 8所示, 所述网络节点还包括均衡组策略控制单元 16, 用 于根据所述均衡组配置单元 11 配置的均衡组基于负载均衡策略对均衡组内 的接口进行控制, 所述 MAC地址管理单元 14判断所述接收接口所在的均衡 组是否还有其他接口, 若没有其他接口, 则控制所述接收接口执行 MAC地 址学习; 否则, 控制所述均衡组策略控制单元 16选择的接口执行 MAC地址 学习, 从而由不同接口执行 MAC地址学习, 实现流量分担的效果, 达到各 个接口上流量的相对均衡的目的。  Optionally, as shown in FIG. 8, the network node further includes an equalization group policy control unit 16 configured to control, according to the load balancing policy, an interface in the equalization group according to the equalization group configured by the equalization group configuration unit 11 The MAC address management unit 14 determines whether the equalization group in which the receiving interface is located has other interfaces, and if there is no other interface, controls the receiving interface to perform MAC address learning; otherwise, controls the equalization group policy control unit 16 to select The interface performs MAC address learning, so that MAC address learning is performed on different interfaces to implement traffic sharing, and the traffic of each interface is relatively balanced.
如上文所述, 所述 MAC地址更新的条件包括:  As described above, the conditions for the MAC address update include:
条件 A: 匹配的地址表项中的接口是与所述接收接口位于同一均衡组; 条件 B: 匹配的地址表项中的接口与所述接收接口位于不同的均衡组且 不是同一类型的接口; 或 条件 c, 匹配的地址表项中的接口与所述接收接口位于不同的均衡组, 但属于同一类型的接口, 且所述网络节点持虚拟机迁移。 Condition A: The interface in the matched address entry is in the same equalization group as the receiving interface; Condition B: the interface in the matched address entry is in a different equalization group than the receiving interface and is not the same type of interface; Or Condition c, the interface in the matched address entry is in a different equalization group from the receiving interface, but belongs to the same type of interface, and the network node is migrated by the virtual machine.
具体地, 满足 MAC地址更新条件 A时, 所述 MAC地址管理管理单元 控制所述均衡组策略控制单元 16选择的所述接收接口所在的均衡组内的接 口执行 MAC地址更新; 满足 MAC地址更新条件 B、 C时, 所述 MAC地址 管理管理单元 14控制所述接收接口执行 MAC地址更新。  Specifically, when the MAC address update condition A is satisfied, the MAC address management management unit controls the interface in the equalization group where the receiving interface selected by the equalization group policy control unit 16 to perform MAC address update; and satisfies the MAC address update condition. B and C, the MAC address management management unit 14 controls the receiving interface to perform MAC address update.
如图 8所示, 所述网络节点还包括均衡组故障处理单元 17, 用于根据所 述均衡组配置单元 11配置的均衡组检测均衡组中的接口, 以及在均衡组中的 接口出现故障时, 通知 MAC地址管理单元 14将该故障接口的 MAC地址表 转移到所述接收接口所在均衡组的其他接口。 若均衡组内各接口出现流量明 显分化情况, 则由均衡组策略控制单元 16处理。  As shown in FIG. 8, the network node further includes an equalization group fault processing unit 17 configured to detect an interface in the equalization group according to the equalization group configured by the equalization group configuration unit 11, and when the interface in the equalization group fails. The MAC address management unit 14 is notified to transfer the MAC address table of the faulty interface to other interfaces of the equalization group in which the receiving interface is located. If the traffic in the equalization group shows a significant difference in traffic, it is processed by the equalization group policy control unit 16.
与相关技术相比较, 本发明实施例引入了上行接口、 下行接口和均衡组, 使网络节点完成对 MAC 的优化学习及报文的转发处理, 这样, 一方面保证 了报文处理的高速高效, 另一方面本发明实施例不需要在网络交换设备上统 一运行控制协议和交互控制报文, 保留了二层的特性, 降低了配置的复杂度 和提高了系统的健壮性, 提高了系统设计的灵活性。 以下结合应用实例, 对本发明实施例的方法进行说明。 应用实例 1 Compared with the related art, the embodiment of the present invention introduces an uplink interface, a downlink interface, and an equalization group, so that the network node completes the optimization learning of the MAC and the forwarding of the packet, thereby ensuring high-speed and efficient packet processing. On the other hand, the embodiment of the present invention does not need to uniformly run the control protocol and the interaction control packet on the network switching device, retains the Layer 2 feature, reduces the complexity of the configuration, improves the robustness of the system, and improves the system design. flexibility. The method of the embodiment of the present invention will be described below in conjunction with an application example. Application example 1
图 9所示为应用实例 1 , 主要说明本发明实施例在标准胖树结构下, 进 行报文转发及 MAC学习的详细过程;  FIG. 9 shows an application example 1 , which mainly illustrates a detailed process of packet forwarding and MAC learning in a standard fat tree structure according to an embodiment of the present invention;
如图 9 所示, 这是本发明实施例在标准胖树(Fat-Tree )结构下转发及 MAC学习过程图, 其 MAC学习和流程如下:  As shown in FIG. 9, this is a process diagram of forwarding and MAC learning in a standard fat tree (Fat-Tree) structure according to an embodiment of the present invention. The MAC learning process is as follows:
步骤 901 : acl节点接收来自其所直连服务器发出的 ARP请求报文, 接 收该报文的接口为 D-P1 (下行接口中第一个接口, 以下类同) ;  Step 901: The acl node receives the ARP request packet sent by the directly connected server, and the interface that receives the packet is D-P1 (the first interface in the downlink interface, the following is the same type);
步骤 902: acl节点分析所接收报文携带的源 MAC信息和目的 MAC信 息, 及接收报文的接口号 D-P1 ; 步骤 903: acl节点学习源 MAC信息和接口 D-P1的信息,写入 MAC表; 该应用实例中, D-P1接口学习了该 MAC地址; Step 902: The acl node analyzes the source MAC address and the destination MAC address carried in the received packet, and the interface number D-P1 of the received packet. Step 903: The acl node learns the source MAC information and the information of the interface D-P1, and writes the MAC table. In the application example, the D-P1 interface learns the MAC address.
步骤 904: acl节点 D-P1接口所在的均衡组没有其他接口, acl节点向所 有其它接口 ( U-P1和 U-P2 )转发该 ARP请求报文;  Step 904: The acl node has no other interface in the equalization group where the D-P1 interface is located, and the acl node forwards the ARP request packet to all other interfaces (U-P1 and U-P2).
步骤 905: agl节点和 ag2节点分别通过其接口 D-P1接收到来自 acl节 点的报文;  Step 905: The agl node and the ag2 node respectively receive the packet from the acl node through the interface D-P1;
步骤 906: agl节点分析所接收报文携带的源 MAC信息和目的 MAC信 息, 及接收报文的接口号 D-P1 ;  Step 906: The agl node analyzes the source MAC information and the destination MAC information carried in the received message, and the interface number D-P1 of the received message;
步骤 907: agl节点学习源 MAC信息和接口 D-P1的信息,写入 MAC表; 该应用实例中, D-P1接口学习了该 MAC地址;  Step 907: The agl node learns the source MAC information and the information of the interface D-P1, and writes the information to the MAC table. In the application example, the D-P1 interface learns the MAC address.
步骤 908: ag2节点按同样的流程在其 D-P1接口上学习该 ARP报文所携 带的 MAC地址;  Step 908: The ag2 node learns the MAC address carried by the ARP packet on its D-P1 interface according to the same procedure.
步骤 909: 因为 D-P1接口所在的均衡组没有其他接口, 那么 agl节点向 所有其他接口 (D-P2、 U-P1和 U-P2 )转发该报文。 cl、 c2和 ac2节点接收 所转发的 ARP请求 4艮文;  Step 909: Because the EQ group where the D-P1 interface is located has no other interfaces, the agl node forwards the packet to all other interfaces (D-P2, U-P1, and U-P2). The cl, c2, and ac2 nodes receive the forwarded ARP request.
步骤 910: ac2节点接收到该 ARP请求 文后, 分析其 MAC信息和接收 报文的接口信息;  Step 910: After receiving the ARP request, the ac2 node analyzes the MAC information and the interface information of the received packet.
步骤 911 : 由于 ac2节点上 U-P1接口为上行接口; 按照网络节点学习 MAC流程进行 MAC学习处理, 在本应用实例中由 U-P1接口学习;  Step 911: The U-P1 interface on the ac2 node is an uplink interface. The MAC learning process is performed according to the network node learning MAC process. In this application example, the U-P1 interface learns.
步骤 912: 由于 U-P2与 U-P1同属同一个均衡组, ac2节点不再向其它 上行接口 U-P2转发。  Step 912: Since U-P2 and U-P1 belong to the same equalization group, the ac2 node is no longer forwarded to other uplink interfaces U-P2.
可理解地, 如 ac2节点还有下行接口则还需向下行接口转发 "^文。  Understandably, if the ac2 node has a downlink interface, it also needs to forward the "^ text" to the downlink interface.
步骤 913: cl节点 D-P1接口接收到 ARP请求报文后, 由于该接口所在 的均衡组没有其他接口, 其学习过程与 acl和 agl节点相似, 不再赘述; 步骤 914: 重复前述步骤, ARP请求报文到达目的服务器 B, 各个网络 节点完成对源服务器 A的 MAC的学习; 目的服务器 B响应 A的请求, 从而 形成一条 A-B间的二层转发路径。 应用实例 2 Step 913: After the D-P1 interface of the cl-node receives the ARP request packet, the learning process is similar to the acl and ag l nodes, and the learning process is similar to the acl and ag l nodes. Step 914: Repeat the foregoing steps. The ARP request packet arrives at the destination server B, and each network node completes the learning of the MAC of the source server A. The destination server B responds to the request of the A, thereby forming a Layer 2 forwarding path between the ABs. Application example 2
图 10所示为应用实例 2, 主要说明本发明实施例在非标准胖树结构下, 进行才艮文转发及 MAC学习的详细过程;  FIG. 10 shows an application example 2, which mainly illustrates a detailed process of performing packet forwarding and MAC learning under the non-standard fat tree structure in the embodiment of the present invention;
如图 10所示, 这是本发明实施例在非标准胖树结构下转发及 MAC学习 过程图, 其 MAC学习和流程如下:  As shown in FIG. 10, this is a process diagram of forwarding and MAC learning in a non-standard fat tree structure according to an embodiment of the present invention. The MAC learning process is as follows:
步骤 1001 : AC1节点接收来自其所直连服务器中虚拟机 VM1发送的免 费 ARP报文, 接收该报文的接口为 D-P1;  Step 1001: The AC1 node receives the free ARP packet sent by the virtual machine VM1 in the directly connected server, and the interface that receives the packet is D-P1.
步骤 1002: AC1节点分析获取所接收报文携带的源 MAC信息, 及接收 报文的接口号 D-P1 ;  Step 1002: The AC1 node analyzes the source MAC address carried by the received packet, and the interface number D-P1 of the received packet.
步骤 1003: AC1节点学习源 MAC信息和接口 D-P1的信息, 写入 MAC 表; 该应用实例中, D-P1接口学习了该 MAC地址;  Step 1003: The AC1 node learns the source MAC information and the information of the interface D-P1, and writes the information to the MAC table. In the application example, the D-P1 interface learns the MAC address.
步骤 1004: AC1节点 D-P1接口所在的均衡组没有其他接口, AC1节点 向所有其它接口 ( U-P1、 U-P2和 U-P3 )转发该免费 ARP报文;  Step 1004: The AC1 node has no other interface in the EQ group where the D-P1 interface is located. The AC1 node forwards the gratuitous ARP packet to all other interfaces (U-P1, U-P2, and U-P3).
步骤 1005: AGG1节点、 AGG 2节点和 AGG 3节点分别通过其接口 D-P1 接收到来自 AC1节点的报文;  Step 1005: The AGG1 node, the AGG2 node, and the AGG3 node respectively receive the packet from the AC1 node through the interface D-P1.
步骤 1006: AGG1节点分析获取所接收报文携带的源 MAC信息, 及接 收报文的接口号 D-P1 ;  Step 1006: The AGG1 node analyzes and obtains the source MAC information carried in the received packet, and the interface number D-P1 of the received packet.
步骤 1007: AGG1节点学习源 MAC信息和接口 D-P1的信息,写入 MAC 表; 该应用实例中, D-P1接口学习了该 MAC地址;  Step 1007: The AGG1 node learns the source MAC information and the information of the interface D-P1, and writes the information to the MAC table. In the application example, the D-P1 interface learns the MAC address.
步骤 1008: AGG2节点和 AGG3节点按同样的流程在其 D-P1接口上学 习该 MAC地址;  Step 1008: The AGG2 node and the AGG3 node learn the MAC address on the D-P1 interface according to the same procedure;
步骤 1009: 因为 AGG1节点 D-P1接口所在的均衡组没有其他接口, 那 么 AGG1节点向其除 D-P1接口外的所有接口 ( D-P2、 D-P3、 U-P1和 U-P2 ) 转发该报文。 Cl、 C2、 AC2和 AC3节点接收所转发的免费 ARP报文;  Step 1009: Because the equalization group in which the D-P1 interface of the AGG1 node is located has no other interfaces, the AGG1 node forwards all interfaces except the D-P1 interface (D-P2, D-P3, U-P1, and U-P2). The message. The Cl, C2, AC2, and AC3 nodes receive the free ARP packets forwarded.
步骤 1010: AC2节点接收到该免费 ARP报文后, 分析其 MAC信息和接 收报文的接口信息; 步骤 1011 : AC2节点按照网络节点 MAC学习流程进行 MAC学习处理, 在本应用实例中, AC2节点上 U-P2学习到 MAC地址, U-P1接口未学习该 MAC地址。 Step 1010: After receiving the gratuitous ARP packet, the AC2 node analyzes the MAC information and the interface information of the received packet. Step 1011: The AC2 node performs MAC learning processing according to the MAC address learning process of the network node. In this application example, the U-P2 on the AC2 node learns the MAC address, and the U-P1 interface does not learn the MAC address.
步骤 1012: 由于 U-P2、 U-P3与 U-P1属同一个均衡组, 同为上行接口的 U-P2和 U-P3不参与转发。  Step 1012: U-P2 and U-P3 are in the same equalization group, and U-P2 and U-P3 on the uplink interface do not participate in forwarding.
步骤 1013: C1节点 D-P1接口接收到免费 ARP报文后, 由于该接口配置 有均衡组。 则根据均衡组策略让均衡组中某一个接口学习报文所携带的 ARP 地址, 在本实施例中, 仍由 D-P1学习该 MAC地址;  Step 1013: After receiving the gratuitous ARP packet, the D-P1 interface on the C1 node has an equalization group configured on the interface. The ARP address carried in the learning packet of the interface in the equalization group is learned by the D-P1 in this embodiment.
步骤 1014: 由于 C1节点配置有多个不同的均衡组, C1节点将该 ARP 报文向接收所述 ARP报文的接口所在的均衡组之外的所有接口转发。在本应 用实例中, 需要向 U-P4、 U-P5 和 U-P6接口转发;  Step 1014: The C1 node forwards the ARP packet to all interfaces except the equalization group where the interface that receives the ARP packet is located, because the C1 node is configured with multiple different equalization groups. In this application example, you need to forward to the U-P4, U-P5, and U-P6 interfaces.
步骤 1015: AGG4、 AGG5和 AGG6节点接收到由 C1节点转发的免费 Step 1015: The AGG4, AGG5, and AGG6 nodes receive the free forwarding by the C1 node.
ARP报文, 并分析获取报文所携带信息及接收接口信息; 按照前述步骤处理 并依次转发; ARP packet, and analyzes the information carried in the packet and the information about the receiving interface; processing according to the foregoing steps and forwarding in sequence;
步骤 1016:免费 ARP " ^艮文转发到全网所有网络节点,各个网络节点完成 对源服务器上虚拟机 VM1的 MAC的学习,从而各个节点都拥有了转发目的 MAC为 VM1的 MAC地址的 MAC转发表项。  Step 1016: The free ARP is forwarded to all the network nodes of the entire network, and each network node completes learning the MAC of the virtual machine VM1 on the source server, so that each node has the MAC address of forwarding the MAC address of the destination MAC to VM1. Publish the item.
应用实例 3 Application example 3
图 11所示为应用实例 3 , 主要说明本发明实施例在组播业务情况下, 进 行报文转发及 MAC学习的详细过程;  FIG. 11 is a flowchart showing an application process example 3, which mainly illustrates a detailed process of packet forwarding and MAC learning in the case of a multicast service according to an embodiment of the present invention;
如图 11所示, 这是本发明实施例在一种组播情况下建树转发及 MAC学 习过程图, 其中路由器(Router )节点为控制网络组播的路由器, 其 MAC学 习和流程如下:  As shown in FIG. 11, this is a process diagram of a tree forwarding and MAC learning process in a multicast case according to an embodiment of the present invention. A router node is a router that controls network multicast, and the MAC learning process is as follows:
步骤 1101 : Router节点向它的所有接口发送组播查询报文; 报文类型为 广播报文;  Step 1101: The router sends a multicast query message to all interfaces of the router; the packet type is a broadcast packet.
步骤 1102: cl、 c2、 c3和 c4网络节点收到组播查询报文后, 按照前述 MAC学习流程学习 MAC; 以下流程以 cl网络节点为例进行描述; 步骤 1103 : cl接收所述组播查询报文的接口为 U-P1 , 所述 U-P1接口所 在的均衡组没有其他接口, 则 cl将组播查询报文向除 U-P1接口外所有接口 转发; Step 1102: After receiving the multicast query message, the cl, c2, c3, and c4 network nodes learn the MAC according to the foregoing MAC learning process; the following process uses the cl network node as an example for description; Step 1103: The interface for receiving the multicast query message is U-P1, and the equalization group where the U-P1 interface is located has no other interface, and the cl will forward the multicast query message to all interfaces except the U-P1 interface. Forward
步骤 1104: agl、 ag3和 ag5 网络节点收到 cl节点转发的组播查询报文; 以 agl网络节点为例进行描述;  Step 1104: The agl, ag3, and ag5 network nodes receive the multicast query message forwarded by the cl node. The agl network node is used as an example for description.
步骤 1105: agl 网络节点获取所接收组播查询报文信息及接收该报文的 接口为 U-P1 ;  Step 1105: The interface of the agl network node to obtain the received multicast query message and receive the message is U-P1;
步骤 1106: agl网络节点根据网络节点 MAC学习流程进行 MAC学习处 理, 在本实施例中, 由 U-P1接口学习; 并向 U-P1所在的均衡组之外的所有 接口转发;  Step 1106: The agl network node performs MAC learning processing according to the network node MAC learning process. In this embodiment, the U-P1 interface learns; and forwards to all interfaces except the equalization group where the U-P1 is located;
步骤 1107: acl和 ac2网络节点收到由 agl网络节点转发的报文; 以 acl 网络节点为例进行描述;  Step 1107: The acl and ac2 network nodes receive the packet forwarded by the agl network node; and the acl network node is used as an example for description;
步骤 1108: acl网络节点学习 MAC和转发流程与 agl相似, 流程类同步 骤 1105-步骤 1106, 不再描述;  Step 1108: The acl network node learns that the MAC and forwarding process is similar to agl, and the process class synchronization step 1105-step 1106 is not described;
步骤 1109: 服务器 A收到来自 acl网络节点的组播查询报文, 服务器 A 响应该组播查询报文; 于是, 形成一条组播分支路径; 其它组播分支路径的 形成过程与此类同, 不再描述;  Step 1109: Server A receives the multicast query message from the acl network node, and server A responds to the multicast query message; thus, a multicast branch path is formed; the formation process of other multicast branch paths is the same as this. No longer described;
步骤 1110: 当所有服务器响应完毕, 组播路径形成。  Step 1110: When all servers respond, the multicast path is formed.
相较于相关技术, 本发明实施例的方法和网络节点因预先根据网络架构 以避免广播风暴为原则为网络节点配置均衡组, 进行报文转发时, 根据预置 的均衡组向接收接口所在的均衡组以外的所有其他接口转发报文即可有效避 免广播风暴, 本发明实施例的方案只需要进行设置, 对节点设备的要求较低, 且容易实现。 另外, 在需要进行 MAC地址学习和更新时, 同一均衡组的接 口根据均衡策略实现了 MAC地址学习的分担, 提高了系统的性能。  Compared with the related art, the method and the network node in the embodiment of the present invention configure an equalization group for the network node according to the network architecture in advance to avoid the broadcast storm. When the packet is forwarded, the preset equalization group is located to the receiving interface. All the other interfaces except the equalization group can forward the packets to avoid broadcast storms. The solution of the embodiment of the present invention only needs to be set, and the requirements for the node devices are low and easy to implement. In addition, when MAC address learning and updating are required, the interface of the same equalization group implements the sharing of MAC address learning according to the equalization policy, which improves the performance of the system.
本领域普通技术人员可以理解上述方法中的全部或部分步骤可通过程序 来指令相关硬件完成, 所述程序可以存储于计算机可读存储介质中, 如只读 存储器、 磁盘或光盘等。 可选地, 上述实施例的全部或部分步骤也可以使用 一个或多个集成电路来实现。 相应地, 上述实施例中的各模块 /单元可以釆用 硬件的形式实现, 也可以釆用软件功能模块的形式实现。 本发明不限制于任 何特定形式的硬件和软件的结合。 One of ordinary skill in the art will appreciate that all or a portion of the above steps may be performed by a program to instruct the associated hardware, such as a read only memory, a magnetic disk, or an optical disk. Alternatively, all or part of the steps of the above embodiments may also be implemented using one or more integrated circuits. Correspondingly, each module/unit in the above embodiment can be used The form of hardware implementation can also be implemented in the form of software function modules. The invention is not limited to any specific form of combination of hardware and software.
本发明实施例中所描述的系统 /装置 /设备中的模块仅是根据其功能进行 划分的一种示例, 可理解地, 在系统 /装置 /设备实现相同功能的情况下, 本领 域技术人员可给出一种或多种其他功能划分方式, 在具体应用时可将其中任 意一个或多个功能模块釆用一个功能实体装置或单元实现, 不可否认地, 以 上变换方式均在本申请保护范围之内。  The modules in the system/device/device described in the embodiments of the present invention are only an example according to their functions. It is understood that, in the case that the system/device/device implements the same function, those skilled in the art may One or more other functional division modes are given, and any one or more of the functional modules may be implemented by one functional entity device or unit in a specific application, and undeniably, the above transformation manners are all within the protection scope of the present application. Inside.
显然,所描述的实施例仅仅是本发明一部分实施例,而非全部的实施例。 基于本发明中的实施例, 本领域普通技术人员在没有做出创造性劳动的前提 下所获得的所有其他实施例, 都属于本发明保护的范围。  It is apparent that the described embodiments are only a part of the embodiments of the invention, and not all of them. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments of the present invention without creative efforts are within the scope of the present invention.
工业实用性 Industrial applicability
本发明实施例的方法和网络节点因预先根据网络架构以避免广播风暴为 原则为网络节点配置均衡组, 进行报文转发时, 根据预置的均衡组向接收接 口所在的均衡组以外的所有其他接口转发报文即可有效避免广播风暴, 本发 明实施例的方案只需要进行设置, 对节点设备的要求较低, 且容易实现。 另 外, 在需要进行 MAC地址学习和更新时, 同一均衡组的接口根据均衡策略 实现了 MAC地址学习的分担, 提高了系统的性能。  The method and the network node in the embodiment of the present invention configure the equalization group for the network node according to the network architecture in advance to avoid the broadcast storm. When the packet is forwarded, all the other groups except the equalization group where the receiving interface is located according to the preset equalization group are performed. The interface can forward the packet to avoid broadcast storms. The solution of the embodiment of the present invention only needs to be set, and the requirements on the node device are low and easy to implement. In addition, when MAC address learning and update are required, the interface of the same equalization group implements the sharing of MAC address learning according to the equalization policy, which improves the performance of the system.

Claims

权 利 要 求 书 Claims
1、 一种二层网络数据传送方法, 包括: 1. A Layer 2 network data transmission method, comprising:
根据网络架构以避免广播风暴为原则为网络节点配置均衡组, 一个均衡 组包括一个或多个接口;  The network node is configured with an equalization group according to the network architecture to avoid the broadcast storm, and one equalization group includes one or more interfaces;
网络节点从接收接口接收 ^艮文; 以及  The network node receives the ^ message from the receiving interface;
所述网络节点向所述接收接口所在均衡组之外的接口转发报文。  The network node forwards the packet to an interface other than the equalization group where the receiving interface is located.
2、 如权利要求 1所述的方法, 其中: 所述均衡组内的接口均为用于与上 层网络设备交互的上行接口或均为用于与下层网络设备交互的下行接口。 2. The method according to claim 1, wherein: the interfaces in the equalization group are uplink interfaces for interacting with upper layer network devices or downlink interfaces for interacting with lower layer network devices.
3、 如权利要求 1所述的方法, 其中: 所述网络节点接收报文后, 所述方 法还包括: 3. The method according to claim 1, wherein: after the network node receives the message, the method further includes:
所述网络节点根据报文中携带的介质访问控制 MAC信息查询本地 MAC 地址表;  The network node queries the local MAC address table according to the medium access control MAC information carried in the packet;
如未查到匹配的地址表项, 则所述网络节点进行 MAC地址学习; 如查到匹配的地址表项, 则所述网络节点判断是否符合 MAC地址更新 条件; 以及  If no matching address entry is found, the network node performs MAC address learning; if a matching address entry is found, the network node determines whether the MAC address update condition is met;
判断符合 MAC地址更新条件时, 所述网络节点进行 MAC地址更新。  When it is judged that the MAC address update condition is met, the network node performs MAC address update.
4、如权利要求 3所述的方法, 其中: 所述网络节点进行 MAC地址学习, 包括: 判断所述接收接口所在的均衡组是否还有其他接口; The method of claim 3, wherein: the network node performing MAC address learning comprises: determining whether the equalization group in which the receiving interface is located has other interfaces;
若没有其他接口, 则所述接收接口执行 MAC地址学习; 以及  If there is no other interface, the receiving interface performs MAC address learning;
若有其他接口, 则根据负载均衡策略选择所述接收接口所在的均衡组内 的接口执行所述 MAC地址学习。  If there are other interfaces, the interface in the equalization group in which the receiving interface is located is selected according to the load balancing policy to perform the MAC address learning.
5、 如权利要求 4所述的方法, 其中: 所述 MAC地址更新的条件包括: 匹配的地址表项中的接口是与所述接收接口位于同一均衡组; The method of claim 4, wherein: the condition for updating the MAC address comprises: the interface in the matched address entry being in the same equalization group as the receiving interface;
匹配的地址表项中的接口与所述接收接口位于不同的均衡组且不是同一 类型的接口; 或 匹配的地址表项中的接口与所述接收接口位于不同的均衡组 , 但属于同 一类型的接口, 且所述网络节点支持虚拟机迁移。 The interface in the matched address entry is in a different equalization group than the receiving interface and is not the same type of interface; or The interface in the matched address entry is in a different equalization group than the receiving interface, but belongs to the same type of interface, and the network node supports virtual machine migration.
6、 如权利要求 5所述的方法, 其中,  6. The method of claim 5, wherein
符合 MAC地址更新条件为匹配的地址表项中的接口是与所述接收接口 位于同一均衡组时, 所述网络节点根据负载均衡策略选择所述接收接口所在 的均衡组内的接口执行 MAC地址更新; 以及  When the interface in the address table entry that matches the MAC address update condition is in the same equalization group as the receiving interface, the network node selects an interface in the equalization group where the receiving interface is located to perform MAC address update according to the load balancing policy. ; as well as
符合 MAC地址更新条件为匹配的地址表项中的接口与所述接收接口位 于不同的均衡组且不是同一类型的接口; 或匹配的地址表项中的接口与所述 接收接口位于不同的均衡组, 但属于同一类型的接口, 且所述网络节点支持 虚拟机迁移时, 所述网络节点的接收接口执行 MAC地址更新。  The interface in the address table entry that matches the MAC address update condition is in a different equalization group than the receiving interface and is not the same type of interface; or the interface in the matched address entry is in a different equalization group from the receiving interface. , but belong to the same type of interface, and the network node supports virtual machine migration, the receiving interface of the network node performs MAC address update.
7、 如权利要求 1所述的方法, 其中: 当网络节点的接口故障时, 所述网 络节点根据负载均衡策略将所述故障接口的 MAC地址表转移到所述故障接 口所在均衡组的接口。 7. The method according to claim 1, wherein: when the interface of the network node fails, the network node transfers the MAC address table of the faulty interface to the interface of the equalization group where the faulty interface is located according to the load balancing policy.
8、 一种网络节点, 包括: 8. A network node, comprising:
若干个接口;  Several interfaces;
均衡组配置单元, 其设置成根据网络架构以避免广播风暴为原则为网络 节点配置均衡组, 一个均衡组包括一个或多个接口; 以及  a balancing group configuration unit configured to configure a balancing group for the network node according to a network architecture to avoid a broadcast storm, and one equalization group includes one or more interfaces;
报文转发控制模块, 从接收接口接收报文时, 其设置成向所述接收接口 所在均衡组之外的接口转发报文。 9、 如权利要求 8所述的网络节点, 其中: 所述均衡组内的接口均为用于 与上层网络设备交互的上行接口或均为用于与下层网络设备交互的下行接 口。  The packet forwarding control module is configured to forward the packet to the interface other than the equalization group where the receiving interface is located when receiving the packet from the receiving interface. The network node according to claim 8, wherein: the interfaces in the equalization group are uplink interfaces for interacting with upper layer network devices or downlink interfaces for interacting with lower layer network devices.
10、 如权利要求 8所述的网络节点, 其中: 所述网络节点还包括: 介质访问控制 MAC地址查询单元,其设置成根据报文中携带的 MAC信 息查询本地 MAC地址表; The network node according to claim 8, wherein: the network node further comprises: a medium access control MAC address querying unit, configured to query a local MAC address table according to the MAC information carried in the packet;
MAC地址管理单元, 其设置成在未查到匹配的地址表项时,控制相应接 口进行 MAC地址学习, 以及在判断符合 MAC地址更新条件时, 控制相应接 口进行 MAC地址更新; 以及 MAC地址更新判断单元 , 其设置成在查到匹配的地址表项时 , 判断是否 符合 MAC地址更新条件。 a MAC address management unit, configured to control the corresponding interface to perform MAC address learning when the matching address entry is not found, and control the corresponding interface to perform MAC address update when determining that the MAC address update condition is met; The MAC address update judging unit is configured to judge whether the MAC address update condition is met when the matching address table entry is found.
11、 如权利要求 10所述的网络节点, 其中: 所述网络节点还包括均衡组 策略控制单元, 其设置成根据所述均衡组配置单元配置的均衡组基于负载均 衡策略对均衡组内的接口进行控制, 所述 MAC地址管理单元判断所述接收 接口所在的均衡组是否还有其他接口, 若没有其他接口, 则控制所述接收接 口执行 MAC地址学习; 若有其他接口, 则控制所述均衡组策略控制单元选 择的接口执行 MAC地址学习。 The network node according to claim 10, wherein: the network node further comprises an equalization group policy control unit, configured to: according to the load balancing policy, the interface in the equalization group according to the equalization group configured by the equalization group configuration unit Controlling, the MAC address management unit determines whether the equalization group in which the receiving interface is located has other interfaces, and if there is no other interface, controls the receiving interface to perform MAC address learning; if there are other interfaces, controls the equalization. The interface selected by the group policy control unit performs MAC address learning.
12、 如权利要求 11所述的网络节点, 其中: 所述 MAC地址更新的条件 包括: 12. The network node according to claim 11, wherein: the condition for updating the MAC address comprises:
匹配的地址表项中的接口是与所述接收接口位于同一均衡组;  The interface in the matched address entry is in the same equalization group as the receiving interface;
匹配的地址表项中的接口与所述接收接口位于不同的均衡组且不是同一 类型的接口; 或  The interface in the matched address entry is in a different equalization group than the receiving interface and is not the same type of interface; or
匹配的地址表项中的接口与所述接收接口位于不同的均衡组, 但属于同 一类型的接口, 且所述网络节点支持虚拟机迁移。  The interface in the matched address entry is in a different equalization group than the receiving interface, but belongs to the same type of interface, and the network node supports virtual machine migration.
13、 如权利要求 12所述的网络节点, 其中,  13. The network node according to claim 12, wherein
符合 MAC地址更新条件为匹配的地址表项中的接口是与所述接收接口 位于同一均衡组时, 所述 MAC地址管理管理单元控制所述均衡组策略控制 单元选择的所述接收接口所在的均衡组内的接口执行 MAC地址更新; 以及 符合 MAC地址更新条件为匹配的地址表项中的接口与所述接收接口位 于不同的均衡组且不是同一类型的接口; 或匹配的地址表项中的接口与所述 接收接口位于不同的均衡组, 但属于同一类型的接口, 且所述网络节点支持 虚拟机迁移时,所述 MAC地址管理管理单元控制所述接收接口执行 MAC地 址更新。  The MAC address management management unit controls the equalization of the receiving interface selected by the equalization group policy control unit when the interface in the address table entry that matches the MAC address update condition is in the same equalization group as the receiving interface. The interface in the group performs the MAC address update; and the interface in the address table entry that matches the MAC address update condition is in the same equalization group as the receiving interface and is not the same type of interface; or the interface in the matched address entry When the receiving interface is in a different equalization group but belongs to the same type of interface, and the network node supports virtual machine migration, the MAC address management management unit controls the receiving interface to perform MAC address update.
14、 如权利要求 8所述的网络节点, 其中: 所述网络节点还包括均衡组 故障处理单元, 其设置成根据所述均衡组配置单元配置的均衡组检测均衡组 中的接口, 以及在均衡组中的接口出现故障时, 通知 MAC地址管理单元将 所述故障接口的 MAC地址表转移到所述接收接口所在均衡组的其他接口。  14. The network node according to claim 8, wherein: the network node further comprises an equalization group failure processing unit configured to detect an interface in the equalization group according to the equalization group configured by the equalization group configuration unit, and to balance When the interface in the group fails, the MAC address management unit is notified to transfer the MAC address table of the faulty interface to other interfaces of the equalization group where the receiving interface is located.
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