WO2012119372A1 - 一种报文处理方法、设备和系统 - Google Patents

一种报文处理方法、设备和系统 Download PDF

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Publication number
WO2012119372A1
WO2012119372A1 PCT/CN2011/078056 CN2011078056W WO2012119372A1 WO 2012119372 A1 WO2012119372 A1 WO 2012119372A1 CN 2011078056 W CN2011078056 W CN 2011078056W WO 2012119372 A1 WO2012119372 A1 WO 2012119372A1
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WIPO (PCT)
Prior art keywords
vlan
port
user
type
downstream
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PCT/CN2011/078056
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English (en)
French (fr)
Inventor
张波
江南
郭文波
罗勇
黄兴林
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华为技术有限公司
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Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Priority to CN201180001827.9A priority Critical patent/CN102326370B/zh
Priority to EP11860387.7A priority patent/EP2728797B1/en
Priority to PCT/CN2011/078056 priority patent/WO2012119372A1/zh
Publication of WO2012119372A1 publication Critical patent/WO2012119372A1/zh
Priority to US14/173,415 priority patent/US9515881B2/en

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L41/00—Arrangements for maintenance, administration or management of data switching networks, e.g. of packet switching networks
    • H04L41/08—Configuration management of networks or network elements
    • H04L41/085—Retrieval of network configuration; Tracking network configuration history
    • H04L41/0853—Retrieval of network configuration; Tracking network configuration history by actively collecting configuration information or by backing up configuration information
    • 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]
    • H04L12/4675—Dynamic sharing of VLAN information amongst network nodes
    • 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]
    • H04L12/4675—Dynamic sharing of VLAN information amongst network nodes
    • H04L12/4679—Arrangements for the registration or de-registration of VLAN attribute values, e.g. VLAN identifiers, port VLAN membership
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L41/00—Arrangements for maintenance, administration or management of data switching networks, e.g. of packet switching networks
    • H04L41/26—Arrangements for maintenance, administration or management of data switching networks, e.g. of packet switching networks using dedicated tools for LAN [Local Area Network] management
    • 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
    • H04L45/66—Layer 2 routing, e.g. in Ethernet based MAN's
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L49/00—Packet switching elements
    • H04L49/70—Virtual switches
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L41/00—Arrangements for maintenance, administration or management of data switching networks, e.g. of packet switching networks
    • H04L41/08—Configuration management of networks or network elements
    • H04L41/0803—Configuration setting
    • H04L41/0813—Configuration setting characterised by the conditions triggering a change of settings
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L41/00—Arrangements for maintenance, administration or management of data switching networks, e.g. of packet switching networks
    • H04L41/12—Discovery or management of network topologies

Definitions

  • the embodiments of the present invention relate to communication technologies, and in particular, to a packet processing method, device, and system. Background technique
  • a Layer 2 network includes many access devices. Each access device is connected to many users. These users are divided into several VLANs.
  • VLAN Virtual Local Area Network
  • a Layer 2 network based on VLAN information and media access control (Media Access Control,
  • each access device needs to know the VLAN to which each port is connected and the MAC address of the access device connected to the port.
  • the configuration of the VLAN information of each port of the access device is currently implemented by manual manual configuration.
  • the network topology is complex. Therefore, the complexity of configuring VLAN information is high. Manual manual configuration is adopted. The risk of configuration errors is large, which may cause service faults on the Layer 2 network. Moreover, since the topology of the network often changes, the VLAN information to be configured also changes frequently, and the operator needs to be reconfigured after each change, which is poor in practical application.
  • STP Spanning Tree Protocol
  • the network topology is changed through STP calculation. The physical connection of each access device in the Layer 2 network does not change, so the operator cannot The topology is changed while the change is known, so that reconfiguration is impossible.
  • the embodiments of the present invention provide a packet processing method, including: Receiving a protocol packet of the downstream device, the protocol packet carrying the uplink port information of the downstream device and the user VLAN of the downstream device; learning the type of the port of the device according to the uplink port information, and The user VLAN of the downstream device classifies the user VLAN of the device and the user VLAN of the downstream device;
  • the received packets are forwarded according to the configuration information saved by the device.
  • the configuration information is configured with the type of ports that can be added to each VLAN type.
  • the embodiment of the present invention further provides a packet processing device, including: a packet receiving unit, configured to receive a protocol packet of a downstream device, where the protocol packet carries uplink port information of the downstream device and the downstream device a user VLAN; a learning unit, configured to learn, according to the uplink port information, a type of a port of the device, and classify a user VLAN of the device and a user VLAN of the downstream device according to the user VLAN;
  • the packet processing unit is configured to forward the received packet according to the configuration information saved by the device, where the configuration information is configured with a port type that can be added by each VLAN type.
  • the embodiment of the present invention further provides a packet processing system, including: the first device, configured to send a protocol packet to the second device, where the protocol packet carries uplink port information of the first device, and User VLAN of the first device;
  • the second device is configured to learn the type of the port of the device according to the uplink port information, and classify the user VLAN of the device and the user VLAN of the first device according to the first device user VLAN; Transfer the received packets according to the configuration information saved by the device.
  • the configuration information is configured with a port type that can be added to each VLAN type.
  • the method, the device, and the system provided by the embodiments of the present invention can automatically learn the port type and classify the VLAN, and can reduce the manual intervention. After obtaining the port type and the VLAN classification, configure each port type according to the delivered network configuration. VLAN information that can be added to optimize network performance. BRIEF DESCRIPTION OF THE DRAWINGS In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, a brief description of the drawings used in the embodiments or the prior art description will be briefly described below. The drawings are some embodiments of the present invention, and those skilled in the art can obtain other drawings based on these drawings without any creative work.
  • 1 is a network structure diagram according to an embodiment of the present invention
  • FIG. 2 is a flowchart of a method according to an embodiment of the present invention
  • FIG. 3 is a structural diagram of a protocol packet according to an embodiment of the present invention
  • FIG. 5 is a schematic diagram of an STP network architecture according to an embodiment of the present invention
  • FIG. 6 is a flowchart of a STP network according to an embodiment of the present invention
  • FIG. 7 is a tree network according to an embodiment of the present invention
  • FIG. 8 is a flowchart of an STP network according to an embodiment of the present invention
  • FIG. 9 is a structural diagram of a device according to an embodiment of the present invention.
  • FIG. 10 is a structural diagram of a system according to an embodiment of the present invention.
  • DETAILED DESCRIPTION OF THE EMBODIMENTS In order to make the objects, technical solutions and advantages of the embodiments of the present invention more clear, the following will be combined with the present invention.
  • the technical solutions in the embodiments of the present invention are clearly and completely described in the accompanying drawings, and the embodiments described are the embodiments of the present invention, but not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative efforts are within the scope of the present invention.
  • the port on the device connected to the user device can be obtained through the device's own physical connection.
  • Uplink Port The port on the device connected to the upper device.
  • Cascade Port The port on the device that is connected to the downstream device.
  • VLAN The VLAN used by the user side of the device but not used by the user side of the downstream device.
  • Common VLAN The VLAN used by the user side of the device and the user side of the downstream device.
  • the most end device The device at the edge of the network. Only one port that enables the solution of the embodiment of the present invention is in the Up state, or is in the Forwarding (STP ring network).
  • the top device It is at the top of the network, and it can be the root bridge device under the STP ring network.
  • Downstream VLAN Abstracts all downstream devices as a logical device.
  • the downstream VLAN information is the set of VLANs used by these downstream devices.
  • the current device can be used as a proxy for these downstream devices to report VLAN information to the upper device of the current device.
  • User VLAN A collection of VLANs used by all user side devices of the current device.
  • VLAN 30 is the local VLAN
  • VLAN 20 is the Across VLAN
  • VLAN 10 is the common VLAN
  • Port 0 on device A is Uplink Port
  • port 1 is Cascade Por.
  • the downstream VLAN information of device A is VLAN1C VLAN20 and VLAN30.
  • Device B is the end device.
  • An embodiment of the present invention provides a packet processing method, as shown in FIG. 2, including:
  • Step 200 Receive a protocol packet of the downstream device, where the protocol packet carries the uplink port information of the downstream device and the user VLAN of the downstream device.
  • the protocol packet in this embodiment may be a packet with a slow protocol, such as a BPDU packet, and the structure may be as shown in FIG. 3.
  • the destination MAC address is 0180c20002, the protocol type is 0x8809, and the protocol subtype is 6.
  • the packet does not carry the tag of the VLAN.
  • the information is carried in the CLV format.
  • the CODE is four bytes long and indicates the CLV information.
  • Type, LEN is four bytes long, indicating the length of the entire CLV
  • VALUE is the actual content, where CODE is 0101 fills in the bridge MAC address of the sending device, CODE is 0102 filled in as the management IP address of the sending device, CODE is 0103
  • the downstream VLAN of the sending device (including Local VLAN, Common VLAN and Across VLAN), the VLAN mask is 512 bytes in total, 4096 bits in total.
  • Step 202 According to the uplink port information, learn the type of the port of the device, and classify the user VLAN of the device and the user VLAN of the downstream device according to the user VLAN of the downstream device.
  • the remaining port on the device with the status UP is Uplink Port.
  • the user VLAN of the device and the user VLAN of the downstream device are compared, and the user VLAN of the device and the user VLAN of the downstream device are identified, including:
  • the local VLAN is used by the user side.
  • the Across VLAN is used on the user side of the device but the user side of the downstream device.
  • the user VLAN and the user side of the downstream device use the common VLAN.
  • Port ⁇ 'J table: ⁇ Uplink Port, Cascade Port, User Port ⁇ ;
  • Step 204 Forward the received packet according to the configuration information saved by the device, where the configuration information is configured with a port type that can be added by each VLAN type.
  • the configuration information in this embodiment may be sent by the upper-layer device or sent by the network management device, and may specifically include:
  • the configuration information can also be configured with port type attributes, including Layer 2 isolation between Cascade Port and User Port and/or prohibiting the learning of the MAC address of the Across VLAN on the Cascade Port.
  • the configuration information may also include receiving only the carried from the User Port and the Uplink Port.
  • the device in this embodiment may be an access device, or may be a routing device or other device.
  • the following embodiment will describe the port type learning and VLAN classification process in this embodiment in detail in the tree network of FIG.
  • the devices C, D, and E check that only one port of the device is in the UP state, or that the device is configured as the last device, the devices C, D, and E consider that the device is the end device.
  • the device sends a protocol packet to the Uplink Port (0).
  • the device C, D, and E periodically send protocol packets to the Uplink Port.
  • the port lists of the devices C, D, and E are all ⁇ 0, NULL, User Port List ⁇ , where the User Port list is a collection of user ports obtained by the device through physical connections;
  • the VLAN list of device C is (NULL) ⁇ 30+100, NULL, NULL ⁇ ;
  • the VLAN ⁇ ' J table of device D is (NULL) ⁇ 40+100, NULL, NULL ⁇ ;
  • the VLAN list of device E is (NULL) ⁇ 50+100, NULL, NULL ⁇ .
  • Device B is manually configured with an Uplink Port, and Device B also carries the upstream port of Device B and the user VLAN actively sends protocol packets to the Uplink Port.
  • device B if device B does not have an Uplink Port configured, device B is in a silent state. Assume that device B first receives the protocol packet sent by device C. Device B first refreshes the port list as ⁇ NULL,1, User Port list ⁇ , and the VLAN list is (1) ⁇ 20,100,30 ⁇ . At this time, device B also has two uncategorized ports in the UP state. Therefore, device B continues to wait until it receives the protocol packet sent by device D. Device B refreshes the port list to ⁇ 0,1 +2,User. Port list ⁇ , the list of VLANs is (1) ⁇ 20,100,30 ⁇ (2) ⁇ 20, 100,40 ⁇ »
  • Device B sends a protocol packet to Uplink Port ( 0 ), and then periodically sends a protocol packet to the Uplink Port.
  • the downstream adjacency of device B is (1) ⁇ MACC, 0 ⁇ (2) ⁇ MACD, 0 ⁇ , where MACC is the MAC address of device C and MACD is the MAC address of device D.
  • device A behaves the same as device B.
  • the device A device is configured as the top device, and the device A is always in a silent state and does not send protocol packets.
  • device A first receives the protocol packet sent by device E, then device A first refreshes the port list as ⁇ NULL, 2, User Port list ⁇ , and the VLAN list is (2) ⁇ 10, 100, 50 ⁇ .
  • device A receives the protocol packet sent by device B, and device A refreshes the port list as ⁇ 0, 1 + 2, User Port list ⁇ , and the VLAN list is (1) ⁇ 10, 100, 20+30+40 ⁇ (2) ) ⁇ 10,100,50 ⁇ .
  • Downstream adjacency of device A The relationship is (1) ⁇ MACB, 0 ⁇ (2) ⁇ MACE, 0 ⁇ , where MACB is the MAC address of device B, and MACE is the MAC address of device E.
  • the port type learning and VLAN classification process in the STP networking will be described below, as shown in Figure 5.
  • Device A is the root bridge, and port 0 of device D is in the DISCARDING state. Under the STP network, all devices can recognize that the STP root ports are Uplink Ports, and the designated ports are Cascade Ports.
  • the port type learning and VLAN learning process can be as shown in Figure 6, including:
  • Device C sends a protocol packet to device B, carrying user VLAN x and Uplink Port 0 of device C.
  • device B can learn that port 1 is the Cascade port and the user VLAN of device C is X.
  • Device B sends a protocol packet to device A, carrying user VLAN x+y and Uplink Port 0 of device B.
  • device A can learn that port 1 is the Cascade port and the user VLAN of device B is x+y.
  • the device D sends a protocol packet to the device A, and carries the user VLAN z and the uplink port 1 of the device D.
  • device A Based on the protocol packet of device D, device A knows that port 0 is the Cascade Port and the user VLAN of device D is ⁇ .
  • the device After obtaining the Cascade Port and the downstream VLAN, the device is used by the device and the downstream device is also a Common VLAN. The local device is used by the device and the downstream device is useless. The device does not. The downstream device uses the Across VLAN to complete the VLAN topology learning process. Next, the devices B, C, and D periodically send protocol packets to the Uplink Port.
  • the third-party management device can obtain the downstream adjacency relationship of each device through a Simple Network Management Protocol (SNMP), and summarize the network topology according to the acquired downstream adjacency relationship, and according to the network topology map,
  • the VLAN list displays the VLAN configuration information.
  • the third-party management device can also receive protocol packets sent by other devices, learn the port types of these devices, and classify VLANs according to the received protocol packets.
  • the device passively receives the protocol packet of the downstream device, and learns the port type and classifies the VLAN according to the protocol packet.
  • the device may also adopt an active mode, that is, each device actively sends the device.
  • the user VLANs are finally configured to form a network VLAN topology.
  • the VLAN topology information can also be added to the STP packets to cooperate with the STP protocol.
  • a field is added to the message to indicate the end device, so that other devices can distinguish the upstream and downstream topologies.
  • the maximum difference between the active mode and the passive mode is that each device sends a protocol packet to all the ports.
  • the device that receives the protocol packet updates the user VLAN of the device and sends protocol packets to all ports.
  • the device Before the end device ID is received, the device only saves the list of VLANs and port lists received from each port. If you manually configure the port type such as Uplink Port, you do not need to determine the end identifier. Can reduce the impact of a single point of failure on the network); After the end device ID is identified, the port type and VLAN type are learned.
  • the method provided in this embodiment can automatically learn the port type and classify the VLAN, and can reduce the manual intervention. After obtaining the port type and VLAN classification, configure the VLAN information that can be added to each port type according to the delivered network configuration. , can optimize network performance.
  • An embodiment of the present invention provides a packet processing device, as shown in FIG. 9, the packet receiving unit 90 is configured to receive a protocol packet of a downstream device, where the protocol packet carries an uplink port of the downstream device. Information and a user VLAN of the downstream device; a learning unit 92, configured to learn, according to the uplink port information, a type of a port of the device, and a user VLAN of the device and a user of the downstream device according to the user VLAN The VLAN is classified.
  • the learning unit 92 can refer to the above description for the port type learning and VLAN classification process, and is not described here.
  • the packet processing unit 94 is configured to forward the received packet according to the configuration information saved by the device, where the configuration information is configured with a port type that can be added by each VLAN type. For the contents of the configuration information, refer to the above description.
  • the packet processing device may further include a message sending unit 96, configured to send, to all ports, protocol packets carrying the port list of the device and the user VLAN.
  • the packet processing device provided in this embodiment may be an access device, such as a Digital Subscriber Line Access Multiplexer (DSLAM), and an optical line terminal (Optical). Line Terminal, OLT) or routing equipment.
  • DSLAM Digital Subscriber Line Access Multiplexer
  • OLT optical line terminal
  • the packet processing device provided in this embodiment can automatically learn the port type and classify the VLAN, and can reduce manual intervention. After obtaining the port type and VLAN classification, configure each port type according to the delivered network configuration. VLAN information can optimize network performance.
  • An embodiment of the present invention provides a packet processing system, as shown in FIG. 10, including: a first device 10, configured to send a protocol packet to the second device 20, where the protocol packet carries the first packet The uplink port information of the device 10 and the user virtual local area network VLAN of the first device 10; the second device 20 is configured to learn the type of the port of the device according to the uplink port information, and according to the first device The user VLAN is used to classify the user VLAN of the device and the user VLAN of the first device.
  • the received packets are forwarded according to the configuration information saved by the device.
  • the configuration information is configured with the port type that can be added to each VLAN type.
  • the first and second devices provided in this embodiment may be a DSLAM, an OLT, or a routing device.
  • the second device can automatically learn the port type and classify the VLAN, which can reduce manual intervention. After obtaining the port type and VLAN classification, configure each port type according to the delivered network configuration.
  • the VLAN information that can be added can optimize network performance.

Description

一种报文处理方法、 设备和系统 技术领域
本发明实施例涉及通信技术， 尤其涉及一种报文处理方法、 设备和系统。 背景技术
目前， 在二层网络中采用虚拟局域网（Virtual Local Area Network, VLAN) 技术。 一个二层网络中包括很多接入设备， 每台接入设备下面又连接很多用户， 这些用户被划分到若干个 VLAN中。 在二层网络中， 根据 VLAN信息和媒体接入控制 （Media Access Control,
MAC )地址信息进行以太网报文转发， 因此各个接入设备需要获知自身的每个 端口所接入的 VLAN以及该端口连接的接入设备的 MAC地址。其中，对于接入 设备各端口的 VLAN信息的配置， 目前采用人工手动配置的方式实现。
对于大型的二层网络， 由于网络拓朴结构复杂， 因此配置 VLAN信息的复 杂度高， 采用人工手动配置的方法， 配置失误的风险大， 会导致二层网络的业 务故障。 并且， 由于网络的拓朴结构经常发生变化， 需要配置的 VLAN信息也 经常发生变化， 在每次发生变化后均需要操作人员重新配置， 在实际应用中的 实用性差。 当二层网络采用生成树协议（Spanning Tree Protocol, STP )环网 时， 通过 STP计算改变网络拓朴结构， 而二层网络中各个接入设备的物理连接 并不发生变化， 因此操作人员无法在拓朴变化的同时获知该变化， 从而无法进 行重新配置。 总之， 现有的人工手动配置接入设备的 VLAN信息的方法正确率 低， 并且实用性差。 发明内容 本发明实施例提供一种报文处理方法， 包括： 接收下游设备的协议报文， 所述协议报文携带所述下游设备的上行端口信 息以及所述下游设备的用户 VLAN; 根据所述上行端口信息， 对本设备的端口的类型进行学习， 以及根据所述 下游设备用户 VLAN对本设备的用户 VLAN以及所述下游设备的用户 VLAN进 行分类；
根据本设备保存的配置信息对收到的报文进行转发， 所述配置信息配置有 每种 VLAN类型能加入的端口类型。
本发明实施例还提供一种报文处理设备， 包括： 报文接收单元， 用于接收下游设备的协议报文， 所述协议报文携带所述下 游设备的上行端口信息以及所述下游设备的用户 VLAN; 学习单元， 用于根据所述上行端口信息， 对本设备的端口的类型进行学习， 以及根据所述用户 VLAN 对本设备的用户 VLAN 以及所述下游设备的用户 VLAN进行分类；
报文处理单元， 用于根据本设备保存的配置信息对收到的报文进行转发， 所述配置信息配置有每种 VLAN类型能加入的端口类型。
本发明实施例还提供一种报文处理系统， 包括： 所述第一设备， 用于向所述第二设备发送协议报文， 所述协议报文携带所 述第一设备的上行端口信息以及所述第一设备的用户 VLAN;
所述第二设备， 用于根据所述上行端口信息， 对本设备的端口的类型进行 学习， 以及根据所述第一设备用户 VLAN对本设备的用户 VLAN以及所述第一 设备的用户 VLAN进行分类； 根据本设备保存的配置信息对收到的报文进行转 发， 所述配置信息配置有每种 VLAN类型能加入的端口类型。
本发明实施例提供的方法、装置和系统，可以自动学习端口类型和对 VLAN 进行分类， 可以减少人工干预， 在获得端口类型和 VLAN分类后， 根据下发的 网络配置， 配置每种端口类型所能加入的 VLAN信息， 可以优化网络性能。 附图说明 为了更清楚地说明本发明实施例或现有技术中的技术方案， 下面将对实施 例或现有技术描述中所需要使用的附图作一简单地介绍， 显而易见地， 下面描 述中的附图是本发明的一些实施例， 对于本领域普通技术人员来讲， 在不付出 创造性劳动的前提下， 还可以根据这些附图获得其他的附图。 图 1为本发明实施例提供的网络结构图； 图 2为本发明实施例提供的方法的流程图； 图 3为本发明实施例提供的协议报文的结构图； 图 4为本发明实施例提供的树形网络架构图； 图 5为本发明实施例提供的 STP网络架构图； 图 6为本发明实施例提供的基于 STP网络的流程图； 图 7为本发明实施例提供的树形网络架构图； 图 8为本发明实施例提供的基于 STP网络的流程图； 图 9为本发明实施例提供的设备的结构图；
图 10为本发明实施例提供的系统的架构图。 具体实施例 为使本发明实施例的目的、 技术方案和优点更加清楚， 下面将结合本发明 实施例中的附图， 对本发明实施例中的技术方案进行清楚、 完整地描述， 显然， 所描述的实施例是本发明一部分实施例， 而不是全部的实施例。 基于本发明中 的实施例， 本领域普通技术人员在没有作出创造性劳动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。
在描述本发明方案之前， 首先对本发明实施例中所出现的一些定义进行描 述：
本发明实施例中所使用的端口的类型， 包括：
1 )用户端口（User Port): 本设备上连接用户侧设备的端口， 可以通过设备 自己的物理连接获取。
2 )上行端口（Uplink Port): 本设备上连接上层设备的端口。
3 )级联端口（Cascade Port): 本设备上连接下游设备的端口。
本发明实施例中所使用的 VLAN的类型， 包括：
1 ) Local VLAN: 只在本设备用户侧使用的 VLAN。
2 ) Across VLAN： 本设备用户侧未使用但下游设备用户侧使用的 VLAN。 3 ) Common VLAN： 本设备用户侧和下游设备用户侧都使用的 VLAN。 本发明实施例中所使用的其他定义， 包括：
1 )最末端设备： 处于网络最边缘的设备， 这类设备只有一个使能本发明实 施例方案的端口处于 Up状态， 或者处于 Forwarding (STP环网下）。
2 )最顶端设备： 处于网络最顶端， 在 STP环网下可以是根桥设备。
3 )下游 VLAN: 将所有下游设备抽象为一台逻辑上的设备， 下游 VLAN信 息是这些下游设备所使用的 VLAN 的集合， 当前设备可以作为这些下游设备的 代理向当前设备的上层设备上报 VLAN信息。 4 )用户 VLAN： 当前设备所有用户侧设备所使用的 VLAN的集合。 为使得上述定义更加清楚， 下面举例说明， 如图 1所示：
假设设备 A所连接的用户使用 VLAN10和 VLAN30， 设备 B所连接的用户 使用 VLAN10和 VLAN20， 这时对于设备 A来说， VLAN30是 Local VLAN , VLAN20是 Across VLAN， VLAN10是 Common VLAN。 设备 A上的端口 0是 Uplink Port, 端口 1是 Cascade Por 设备 A的下游 VLAN信息为 VLAN1C VLAN20和 VLAN30。 设备 B是最末端设备。 本发明一个实施例提供一种报文处理方法， 如图 2所示， 包括：
步骤 200、接收下游设备的协议报文，协议报文中携带下游设备的上行端口 信息以及下游设备的用户 VLAN。
本实施例中的协议报文可以是采用慢速协议的报文， 如 BPDU报文等， 结 构可以如图 3所示。
对于此类报文， 目的 MAC地址为 0180c20002， 协议类型为 0x8809， 协 议子类型为 6，报文不携带 VLAN的 tag标志，后面以 CLV格式携带信息， CODE 长四个字节， 表示 CLV的信息类型， LEN长四个字节， 表示整个 CLV的长度， VALUE为实际内容，其中 CODE为 0101填写发送端设备的桥 MAC地址， CODE 为 0102填写为发送端设备的管理 IP地址， CODE为 0103填写发送端设备的 下游 VLAN (包括 Local VLAN , Common VLAN和 Across VLAN )， VLAN掩 码共 512字节， 共 4096个比特， 从低到高每一个比特表示对应的 VLAN ID, CODE为 0104填写发送端设备的 Uplink PORT, 其它为保留。 步骤 202、根据所述上行端口信息，对本设备的端口的类型进行学习， 以及 根据所述下游设备用户 VLAN对本设备的用户 VLAN 以及所述下游设备的用户 VLAN进行分类。
具体的， 在对本地端口的类型进行学习时， 学习本设备上与所述上行端口 相连的端口的类型为 Cascade Port
根据本设备上的物理连接可以得到本设备上的 User Port列表，本设备上剩 下的状态为 UP的端口为 Uplink Port
在对 VLAN进行分类时， 可以将本设备的用户 VLAN以及所述下游设备的 用户 VLAN 进行比较， 识别所述本设备的用户 VLAN 与所述下游设备的用户 VLAN的类型， 包括： 只在本设备用户侧使用的为 Local VLAN; 本设备用户侧 未使用但下游设备用户侧使用的为 Across VLAN; 本设备用户侧和下游设备用 户侧都使用的为 Common VLAN。
本实施例中每台设备需要保留的参数包括：
1 ) 下游邻接关系： （ Cascade Port ) {下游邻接桥 MAC和 IP、 下游邻接桥 上行端口 };
2 )用户 VLAN信息；
3 )端口歹 'J表： {Uplink Port, Cascade Port、 User Port};
4 ) VLAN列表： ( Cascade Port ) {Local VLAN , Common VLAN , Across VLAN}。 步骤 204、根据本设备保存的配置信息对收到的报文进行转发，所述配置信 息配置有每种 VLAN类型能加入的端口类型。 本实施例中的配置信息可以是由上层设备下发下来或者由网管设备下发下 来， 具体可以包括：
Local VLAN加入 Uplink Port, Across VLAN和 Common VLAN加入对应 的 Uplink Port和 Cascade Port
在配置了每种 VLAN类型能加入的端口类型后， 在相应类型的端口只接收 携带有对应 VLAN类型的报文。
配置信息还可以配置端口类型的属性， 包括 Cascade Port和 User Port之 间配置二层隔离和 /或禁止 Cascade Port上对 Across VLAN的 MAC地址的学 习功能。
配置信息还可以包括只接收来自 User Port 和 Uplink Port 的携带有
Common VLAN或 Local VLAN的报文。
本实施例中的设备可以是接入设备， 还可以是路由设备或者其他设备等。 为了清楚的描述本发明， 以下实施例将以图 4的树形网络对本实施例中的 端口类型学习和 VLAN分类过程进行详细的说明。
在图 4中， 假设设备 A的用户 VLAN为 10和 100， 设备 B的用户 VLAN 为 20和 100， 设备 C的用户 VLAN为 30和 100， 设备 D的用户 VLAN为 40 和 100， 设备 E的用户 VLAN为 50和 100。
在本实施例中， 设备 C、 D、 E三台设备检查本设备只有一个端口处于 UP 状态， 或者检查本设备被配置为最末端设备， 则设备 C、 D、 E认为本设备是最 末端设备， 主动向 Uplink Port(0)发送协议报文， 随后设备 C、 D、 E会定时向 Uplink Port发送协议报文。 设备 C、 D、 E的端口列表都是 {0,NULL,User Port列表 }， 其中 User Port 列表为设备通过物理连接获取的用户端口的集合；
设备 C的 VLAN列表为（NULL){30+100,NULL,NULL};
设备 D的 VLAN歹' J表为（NULL){40+100,NULL,NULL};
设备 E的 VLAN列表为（NULL){50+100,NULL,NULL}。
假设设备 B被手工配置了 Uplink Port, 则设备 B也会携带设备 B的上行端 口以及用户 VLAN主动向 Uplink Port发送协议报文。
本实施例中， 设备 B没有配置 Uplink Port, 则设备 B处于沉默状态。 假设 设备 B 先收到了设备 C 发来的协议报文， 设备 B 首先刷新端口列表为 {NULL,1 , User Port列表 }， VLAN列表为（1 ){20,100,30}。 此时设备 B还有两个 没有分类的处于 UP状态的端口， 因此设备 B继续等待， 直到收到设备 D发来 的协议报文， 设备 B又刷新端口列表为 {0,1 +2,User Port列表 }， VLAN列表为 (1 ){20,100,30}(2){20, 100,40}»
设备 B向 Uplink Port ( 0 )发送协议报文， 随后定时向 Uplink Port发送协 议报文。 设备 B 的下游邻接关系为（1 ){ MACC,0}(2){MACD,0}， 其中， MACC 为设备 C的 MAC地址， MACD为设备 D的 MAC地址。
如果设备 A没有被手工配置为最顶端设备，则设备 A的行为和设备 B相同。 本实施例中设备 A设备被配置为最顶端设备， 则设备 A始终处于沉默状态， 不 发送协议报文。 假设设备 A先收到了设备 E发来的协议报文， 则设备 A首先刷 新端口列表为 {NULL,2,User Port列表 }， VLAN列表为 (2){10, 100,50}。 接着设 备 A收到设备 B发来的协议报文， 设备 A又刷新端口列表为 {0,1 +2, User Port 列表 }， VLAN列表为（1 ){10,100,20+30+40}(2){10,100,50}。 设备 A的下游邻接 关系为（1 ){MACB,0}(2){MACE,0}，其中， MACB为设备 B的 MAC地址， MACE 为设备 E的 MAC地址。 以下将描述在 STP组网下端口类型学习和 VLAN分类过程， 如图 5所示。 其中， 设备 A为根桥， 设备 D的端口 0处于 DISCARDING状态。 在 STP 组网下， 所有设备都能意识到 STP 根端口都是 Uplink Port, 指定端口都是 Cascade Port
端口类型学习和 VLAN学习过程可以如图 6所示， 包括：
600、设备 C向设备 B发送协议报文，携带设备 C的用户 VLAN x和 Uplink Port 0。
设备 B根据该协议报文可以得知端口 1为 Cascade Port, 设备 C的用户 VLAN为 X。
602、设备 B向设备 A发送协议报文，携带设备 B的用户 VLAN x+y和 Uplink Port 0。
设备 A根据设备 B的协议报文可以得知端口 1为 Cascade Port,设备 B的 用户 VLAN为 x+y。
604、设备 D向设备 A发送协议报文，携带设备 D的用户 VLAN z和 Uplink Port 1。
设备 A根据设备 D的协议报文可以得知端口 0为 Cascade Port, 设备 D 的用户 VLAN为∑。
在获取了 Cascade Port和下游 VLAN后，判断本设备用的且下游设备也用 的是 Common VLAN， 本设备用的且下游设备没用的是 Local VLAN， 本设备没 用而下游设备用的是 Across VLAN， 就完成了 VLAN拓朴学习过程， 接下来就 是设备 B、 C、 D定时向 Uplink Port发送协议报文。
假设 STP配置发生变化， 新的 DISCARDING端口如图 7所示， 设备 C的 端口 0被 DISCARDING ,设备 A还是根桥，则新的端口类型和 VLAN类型的学 习过程如图 8所示。
本发明另一个实施例中， 第三方管理设备可以通过简单网络管理协议 (Simple Network Management Protocol, SNMP)获取每台设备的下游邻接关 系，根据获取的下游邻接关系汇总出网络拓朴图，并根据 VLAN列表显示 VLAN 配置信息， 第三方管理设备也可以接收其他设备发送的协议报文， 根据收到的 协议报文对这些设备的端口类型进行学习以及对 VLAN进行分类。 上述实施例是设备被动接收下游设备的协议报文， 根据协议报文学习端口 类型和对 VLAN进行分类， 在本发明另外实施例中， 设备也可以采用主动方式， 即每台设备主动发送本设备的用户 VLAN， 最终交互形成网络 VLAN拓朴， 也 可以将 VLAN拓朴信息加到 STP报文中配合 STP协议运行。
因为主动方式一开始没有区分出来最末端设备， 所以报文中需要增加一个 字段表示最末端设备， 以供其它设备区分上下游拓朴。
主动方式与被动方式的最大差别， 是一开始每台设备都会向所有端口主动 发送协议报文， 收到协议报文的设备更新本设备用户 VLAN后向所有端口发送 协议报文。 在收到最末端设备标识前， 因为无法区分上下游， 设备只是保存从 每个端口收到的 VLAN列表和端口列表等信息（如果手工配置了 Uplink Port等 端口类型则不需要判断最末端标识， 可以使单点故障对网络的影响缩小）； 在收 到最末端设备标识后， 再进行端口类型和 VLAN类型的学习。
本实施例提供的方法， 可以自动学习端口类型和对 VLAN进行分类， 可以 减少人工干预， 在获得端口类型和 VLAN分类后， 根据下发的网络配置， 配置 每种端口类型所能加入的 VLAN信息， 可以优化网络性能。 本发明一个实施例提供一种报文处理设备， 如图 9所示， 包括： 报文接收单元 90， 用于接收下游设备的协议报文， 所述协议报文携带所述 下游设备的上行端口信息以及所述下游设备的用户 VLAN; 学习单元 92， 用于根据所述上行端口信息， 对本设备的端口的类型进行学 习， 以及根据所述用户 VLAN对本设备的用户 VLAN 以及所述下游设备的用户 VLAN进行分类； 学习单元 92具体对端口类型的学习和对 VLAN的分类过程可以参考上面的 描述， 在此不再阐述。 报文处理单元 94，用于根据本设备保存的配置信息对收到的报文进行转发， 所述配置信息配置有每种 VLAN类型能加入的端口类型。 有关配置信息的内容可以参照上面的描述。 所述报文处理设备还可以包括报文发送单元 96， 用于向所有端口发送携带 有本设备的端口列表和用户 VLAN的协议报文。 本实施例提供的报文处理设备可以是接入设备， 如数字用户线路接入复用 器 (Digital Subscriber Line Access Multiplexer, DSLAM), 光线路终端（Optical Line Terminal, OLT)或者路由设备等。 本实施例提供的报文处理设备， 可以自动学习端口类型和对 VLAN进行分 类， 可以减少人工干预， 在获得端口类型和 VLAN分类后， 根据下发的网络配 置， 配置每种端口类型所能加入的 VLAN信息， 可以优化网络性能。 本发明一个实施例提供一种报文处理系统， 如图 10所示， 包括： 第一设备 10， 用于向所述第二设备 20发送协议报文， 所述协议报文携带 所述第一设备 10 的上行端口信息以及所述第一设备 10 的用户虚拟局域网 VLAN; 第二设备 20， 用于根据所述上行端口信息， 对本设备的端口的类型进行学 习， 以及根据所述第一设备的用户 VLAN对本设备的用户 VLAN以及所述第一 设备的用户 VLAN进行分类； 根据本设备保存的配置信息对收到的报文进行转 发， 所述配置信息配置有每种 VLAN类型能加入的端口类型。 本实施例提供的第一、 第二设备可以是 DSLAM、 OLT或者路由设备等。 本实施例提供的报文处理系统，第二设备可以自动学习端口类型和对 VLAN 进行分类， 可以减少人工干预， 在获得端口类型和 VLAN分类后， 根据下发的 网络配置， 配置每种端口类型所能加入的 VLAN信息， 可以优化网络性能。

Claims

权利要求书
1、 一种报文处理方法， 其特征在于， 包括： 接收下游设备的协议报文， 所述协议报文携带所述下游设备的上行端口信 息以及所述下游设备的用户虚拟局域网 VLAN; 根据所述上行端口信息， 对本设备的端口的类型进行学习， 以及根据所述 下游设备用户 VLAN对本设备的用户 VLAN以及所述下游设备的用户 VLAN进 行分类； 根据本设备保存的配置信息对收到的报文进行转发， 所述配置信息配置有 每种 VLAN类型能加入的端口类型。
2、 根据权利要求 1所述的方法， 其特征在于， 所述本设备的端口的类型包 括： 连接用户侧设备的用户端口、 连接上层设备的上行端口以及连接下游设备 的级联端口。
3、 根据权利要求 1所述的方法， 其特征在于， VLAN的类型包括： 只在本设备用户侧使用的 Local VLAN、 本设备用户侧未使用但下游设备用 户侧使用的 Across VLAN、 和本设备用户侧和下游设备用户侧都使用的 Common VLAN。
4、 根据权利要求 2所述的方法， 其特征在于， 所述根据所述上行端口信息 对本地端口的类型进行学习包括： 学习本设备上与所述上行端口相连的端口的类型为级联端口。
5、 根据权利要求 3所述的方法， 其特征在于， 所述根据所述下游设备的用 户 VLAN对本设备的用户 VLAN以及所述下游设备的用户 VLAN进行分类具体 包括： 将所述本设备的用户 VLAN与所述下游设备的用户 VLAN进行比较， 识别 所述本设备的用户 VLAN与所述下游设备的用户 VLAN的类型。
6、 根据权利要求 4所述的方法， 其特征在于， 所述方法还包括： 通过本设备的上行端口发送携带本设备的上行端口和本设备的用户 VLAN 的协议报文。
7、 根据权利要求 1 所述的方法， 其特征在于， 所述配置信息配置有每种 VLAN类型能加入的端口类型具体包括：
Local VLAN加入上行端口， Across VLAN和 Common VLAN加入对应的 上行端口和级联端口。
8、 根据权利要求 1 -7任意一项所述的方法， 其特征在于， 所述配置信息还 配置有端口类型的属性， 包括： 级联端口和用户端口之间配置二层隔离和 /或禁 止级联端口上对 Across VLAN的媒体访问控制 MAC地址学习功能。
9、 根据权利要求 1 -7任意一项所述的方法， 其特征在于， 所述配置信息还 包括：只接收来自用户端口和上行端口的携带有 Common VLAN或 Local VLAN 的报文。
10、 一种报文处理设备， 其特征在于， 包括： 报文接收单元， 用于接收下游设备的协议报文， 所述协议报文携带所述下 游设备的上行端口信息以及所述下游设备的用户虚拟局域网 VLAN; 学习单元， 用于根据所述上行端口信息， 对本设备的端口的类型进行学习， 以及根据所述用户 VLAN 对本设备的用户 VLAN 以及所述下游设备的用户 VLAN进行分类； 报文处理单元， 用于根据本设备保存的配置信息对收到的报文进行转发， 所述配置信息配置有每种 VLAN类型能加入的端口类型。
11、 根据权利要求 10所述的报文处理设备， 其特征在于， 所述报文处理设 备还包括报文发送单元， 所述报文发送单元， 用于向所有端口发送携带有本设备的端口列表和用户
VLAN的协议报文。
12、 一种报文处理系统， 包括第一设备和第二设备， 其特征在于， 所述第一设备， 用于向所述第二设备发送协议报文， 所述协议报文携带所 述第一设备的上行端口信息以及所述第一设备的用户虚拟局域网 VLAN;
所述第二设备， 用于根据所述上行端口信息， 对本设备的端口的类型进行 学习， 以及根据所述第一设备的用户 VLAN对本设备的用户 VLAN以及所述第 一设备的用户 VLAN进行分类； 根据本设备保存的配置信息对收到的报文进行 转发， 所述配置信息配置有每种 VLAN类型能加入的端口类型。
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