WO2009049503A1 - Procédé et dispositif permettant de découvrir automatiquement une topologie de réseau et de gérer des ressources sur un réseau pbb te - Google Patents

Procédé et dispositif permettant de découvrir automatiquement une topologie de réseau et de gérer des ressources sur un réseau pbb te Download PDF

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Publication number
WO2009049503A1
WO2009049503A1 PCT/CN2008/070974 CN2008070974W WO2009049503A1 WO 2009049503 A1 WO2009049503 A1 WO 2009049503A1 CN 2008070974 W CN2008070974 W CN 2008070974W WO 2009049503 A1 WO2009049503 A1 WO 2009049503A1
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WO
WIPO (PCT)
Prior art keywords
network
resource information
information
network topology
pbb
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PCT/CN2008/070974
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English (en)
Chinese (zh)
Inventor
Suping Zhai
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Huawei Technologies Co., Ltd.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication date
Application filed by Huawei Technologies Co., Ltd. filed Critical Huawei Technologies Co., Ltd.
Publication of WO2009049503A1 publication Critical patent/WO2009049503A1/fr

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    • 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
    • Y—GENERAL 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
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00—Reducing energy consumption in communication networks

Definitions

  • the present invention relates to the field of computer network technologies, and in particular, to a method and apparatus for automatic topology discovery and resource management in a Provider Backbone Bridge Traffic Engineering (PBB TE) network.
  • PBB TE Provider Backbone Bridge Traffic Engineering
  • PBB TE is based on PBB
  • PBB speaks Mac-in-Mac in plain language, that is, by encapsulating a layer of media access control (MAC) address in front of a normal Ethernet (Ethernet) frame, called the backbone layer address, so that the user address and operation The quotient address is separated.
  • MAC media access control
  • Ethernet Ethernet
  • MSTP Multiple Spanning Tree Protocol
  • PBB TE Provide Backbone Bridge Traffic Engineering
  • B-MAC Backbone Media Access Control
  • B-VLAN backbone layer virtual local area network
  • the channel acts as a service transmission tunnel, and the PBB TE tunnel can carry multiple PBB services. Used to solve traffic engineering problems in Ethernet. Different transport channels can be marked by different B-MAC+B-VLAN combinations for the deployment of traffic engineering to provide optional transport channels.
  • the main PBB TE tunnel establishment mechanism is static configuration to ensure bandwidth management and implementation complexity.
  • Methods In actual network deployment, the entire PBB TE network topology and network resource status need to be known in advance in order to meet actual service requirements.
  • topology and resource information can only be manually recorded during the deployment of the network, so that it can be used when configuring a static tunnel.
  • the static network management configuration is simple, but there is no intelligent solution for collecting PBB TE network topology and resource information. It relies entirely on the manual method to record the topology and resource information of the PBB TE network, which not only increases the workload, but also takes To configure the possibility of error.
  • GMPLS is a tunnel establishment mechanism. It establishes a forwarding tunnel in a specified network based on existing topology information and resource information to carry various services.
  • GMPLS is used as a PBB TE tunnel establishment mechanism for the PBB TE network, and there is still no means for collecting topology information and resource information.
  • the topology information and resource information manually recorded by the network deployment are used as input to the GMPLS signaling protocol.
  • the embodiments of the present invention provide a method and device for automatic topology discovery and resource management in a PBB TE network, which can implement automatic topology discovery and resource management in a PBB TE network.
  • the method includes the following steps:
  • the first network node constructs and sends a link layer discovery protocol LLDP packet including network topology information and resource information;
  • the link layer discovery protocol LLDP packet that includes the network information and the resource information, and recording the network topology information in the LLDP packet into the local network topology information database, where The resource information in the LLDP packet is recorded in a local resource information database.
  • the embodiment of the invention further provides a method for collecting network topology information and resource information in a PBB TE network, which includes the following steps: Receiving LLDP messages containing network topology information and resource information from other network nodes in the PBB TE network;
  • the network topology information in the LLDP packet is recorded in the local network topology information database, and the resource information in the LLDP packet is recorded in the local resource information database.
  • the embodiment of the present invention further provides a method for sending network topology information and resource information in a PBB TE network, including the following steps:
  • the network node of the PBB TE network starts the sending timer.
  • the sending timer expires or the network status changes
  • the LLDP 4 packet containing the network topology information and the resource information, the packet, and the other nodes in the network are sent. Said the essay.
  • the PBB TE network node device which is also proposed by the embodiment of the present invention, includes an interface for interacting with other network nodes, and further includes:
  • a network topology information database for storing network topology information of other network nodes
  • a resource information database for storing resource information of other network nodes
  • an information receiving module configured to receive LLDP packets from the interface of the local node, Extracting network topology information, and sending the network topology information to the network topology information database; extracting resource information from the LLDP message, and sending the resource information to the resource information Database
  • the information sending module sends an LLDP packet containing the network topology information and the resource information to the peer PBB TE node when the sending timer expires or the local network status changes.
  • the extension of the link layer discovery protocol can implement automatic topology discovery and resource information management in the PBB TE network, thereby providing sufficient information for the establishment of the PBB TE tunnel.
  • the guarantee of QoS and the deployment of TE have important meanings and functions.
  • Figure 1 is a schematic diagram of the LLDP protocol framework
  • 2 is a flowchart of processing at a receiving end according to an embodiment of the present invention
  • 3 is a flowchart of processing at a transmitting end according to an embodiment of the present invention
  • FIG. 4 is a schematic diagram of a network node device for implementing automatic topology discovery and resource information management of a PBB TE network according to Embodiment 2 of the present invention. detailed description
  • the link layer discovery protocol (LLDP) is extended, so that the nodes of the PBB TE network can perform automatic network topology discovery and resource information management through the extended LLDP packet.
  • LLDP is a network topology discovery protocol based on management layer technology, which enables the discovery of devices and physical topologies.
  • the protocol uses the IEEE slow protocol, which is characterized by transmitting no more than five protocol frames per second to collect the chassis identification (Chassis ID) and port identification (Port ID) information of the node station.
  • the time to live (TTL) carried in the Type Length Value (TLV) indicates the storage time of the information, allowing the information to be automatically aged; when the device is down, the corresponding information is fast. Clear.
  • the framework of the LLDP protocol is shown in Figure 1.
  • the LLDP agent (LLDP agent) includes a receiving module and a sending module to implement the interaction of MIB information bases between different nodes in the network.
  • the main parameters involved in the LLDP protocol include the rack ID, port ID, and lifetime. It may also include a vendor-specific MIB ( Vendor Specific MIB).
  • Table 1 The LLDP packet data unit (PDU) format is shown in Table 2: Table 2 Currently in the TLVs already defined in the standard, there are the following mandatory items:
  • the Chassis ID TLV can indicate the identity of the rack, the physical interface/backplane identification on the rack, the system's MAC address, and the system's management address.
  • Port ID TLV can indicate the port ID, the MAC address of the port, the network management address to which the port belongs, and the IP address corresponding to the port.
  • the TTL TLV can indicate the maximum retention time of information sent by LLDP. If you need to delete the corresponding information, set the TTL to 0 to send LLDP packets.
  • End of LLDP PDU The TLV is used to mark the end of the PDU message.
  • TLVs there are a range of optional TLVs with the following options:
  • A) Basic management TLV series including port description TLV, system name TLV, system description TLV (such as system version, operating system type, hardware type, etc.), system capability TLV (as terminal, bridge or router)
  • TLV series including port VID TLV, port and VID TLV, VLAN name description TLV, and protocol description TLV.
  • IEEE802.3 related TLV series including MAC/PHY configuration/status TLV (self-negotiation capability, full-duplex status description), whether power supply TLV can be provided through twisted pair copper, link aggregation TLV and maximum supported by 802.3 Frame TLV.
  • the TLV field setting in the LLDP protocol packet also allows the device vendor to implement various extension functions.
  • the LLDP protocol can be extended.
  • the specific scheme of the LLDP extension in the embodiment of the present invention is as follows: Add PBB TE-specific automatic topology discovery and corresponding resource information LLDP TLV option , Carry PBB TE network topology / resource related information.
  • Specific to the LLDP TLV option The format is shown in Table 3:
  • Table 3 Delay Metric is a relative concept, set according to the support of the system. If not supported, it must be set to 0.
  • the specific bandwidth (Bandwidth) can be as shown in Table 4.
  • the extended TLV option enables automatic topology discovery and resource information management in the PBB TE network to provide a basis for the establishment of the PBB TE tunnel.
  • the following describes the processing flow for implementing automatic topology discovery and resource management, and the network node device for implementing automatic topology discovery and resource management, respectively, through two specific embodiments.
  • the first embodiment of the present invention provides a processing flow for the automatic topology discovery and resource management of the LLDP agent.
  • the local PBB TE topology database and the resource information database are maintained, and the network topology information and resource information in the extension items shown in Table 3 above are carried through the LLDP message.
  • Step S201 The receiving end performs an initialization process, including setting the receiving port to be available, and the supervisory state (AdminStatus) is enabled, and deleting the original peer management information base. (Management Information Base, MIB).
  • MIB Management Information Base
  • Step S202 Start a wait timer, and wait for the peer LLDP proxy to send LLDP information.
  • Step S203 It is judged whether the waiting timer is timed out. If yes, step S204 is performed, otherwise step S205 is performed.
  • Step S204 Delete the MIB information of the peer LLDP proxy corresponding to the waiting timer, and return to step S202.
  • Step S205 Receive LLDP information sent by the peer LLDPAgent, and extract network topology/resource related information from the LLDP information.
  • Step S206 Maintain the local PBB TE network topology information database and the resource information database according to the received LLDP information, and record the PBB TE network topology information and resource information respectively.
  • Step S301 The sending end performs an initialization process, including setting a sending port to be available, and initializing a local PBB TE MIB information base, Txlnterval, TxDelay, and the like.
  • Step S302 Start a sending timer, determine whether the sending timer expires or whether the local information changes. If yes, go to step S303, otherwise go to step S301.
  • Step S303 Construct and send an LLDP message including network topology information and resource information to the peer LLDP proxy according to the local PBB TE MIB information.
  • a second embodiment of the present invention provides a network node device for implementing automatic topology discovery and resource information management of a PBB TE network.
  • the block diagram of the network is as shown in FIG. 4, and includes an interface for interacting with other network nodes, and includes:
  • the network topology information database 401 is configured to store network topology information, where the network topology information includes a B-MAC address of a port of another node in the network, and whether the port supports PBB TE.
  • the resource information database 402 is configured to store resource information, where the resource information includes any combination of the following: a type of protection provided by a port of another node in the network, a maximum transmission unit of the port, an available bandwidth, and a PBB TE delay parameter.
  • the information receiving module 403 is configured to extract network topology information and resource information from the LLDP protocol packet received by the network node interface, and send the network topology information to the network topology information database 401, where Resource information is sent to the resource information database 402.
  • the information sending module 404 is configured to add the network topology information and the resource information of the local node to the LLDP protocol packet to be sent to the other network node, and send the LLDP protocol packet by using the local node interface.
  • the information sending module 404 can include a sending timer for controlling network topology information/resource information to implement timing transmission. At the same time, the information sending module 404 is also responsible for monitoring whether the local network status changes. Once the change is detected, the corresponding network topology information/resource information is sent to the opposite end.
  • the solution provided by the embodiment of the present invention can implement automatic topology discovery and resource information management in the PBB TE network, thereby providing sufficient information for establishing the PBB TE tunnel, and ensuring the QoS of the service. Meaning and role.
  • the present invention can be implemented by hardware, or can be implemented by means of software plus necessary general hardware platform, and the technical solution of the present invention. It can be embodied in the form of a software product that can be stored in a non-volatile storage medium (which can be a CD-ROM, a USB flash drive, a mobile hard disk, etc.), including a number of instructions for making a computer device (may It is a personal computer, a server, or a network device, etc.) that performs the methods described in various embodiments of the present invention.
  • a non-volatile storage medium which can be a CD-ROM, a USB flash drive, a mobile hard disk, etc.
  • a computer device may It is a personal computer, a server, or a network device, etc.

Abstract

L'invention concerne un procédé permettant de découvrir automatiquement une topologie de réseau et de gérer des informations de ressources sur un réseau d'ingénierie de trafic à pont de dorsale de fournisseur (PBB TE). Le procédé comprend les opérations suivantes. Le premier nœud de réseau crée et envoie un message LLDP (protocole de découverte de couche de liaison) contenant des informations de topologie et des informations de ressources. Le deuxième nœud reçoit le message LLDP, enregistre les informations de topologie contenues dans ledit message LLDP dans la base de données d'informations de topologie de réseau locale et enregistre les informations de ressources contenues dans ledit message LLDP dans la base de données d'informations de ressources locale. Un autre procédé d'envoi et de recueil d'informations de topologie de réseau et d'informations de ressources dans le réseau PBB TE est décrit. Un dispositif permettant de découvrir automatiquement une topologie de réseau et de gérer des informations de ressources dans le réseau PBB TE est décrit. Une découverte automatique de topologie de réseau et une gestion des informations de ressources peuvent être mise en œuvre.
PCT/CN2008/070974 2007-10-18 2008-05-15 Procédé et dispositif permettant de découvrir automatiquement une topologie de réseau et de gérer des ressources sur un réseau pbb te WO2009049503A1 (fr)

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CN200710181537A CN101414963B (zh) 2007-10-18 2007-10-18 Pbb te网络中自动拓扑发现及资源管理的方法和装置
CN200710181537.2 2007-10-18

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WO2013102814A1 (fr) * 2012-01-05 2013-07-11 International Business Machines Corporation Fragmentation de paquets de protocole de découverte de couche liaison
CN114521322A (zh) * 2019-10-10 2022-05-20 思科技术公司 动态发现网络中的服务节点

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CN101534216B (zh) * 2009-04-24 2011-05-11 北京东土科技股份有限公司 基于拓扑桶算法的自动拓扑实现方法
CN102238066B (zh) * 2010-04-27 2014-06-04 杭州华三通信技术有限公司 实时上报流量的方法、媒体终端及系统
CN102223278B (zh) 2011-05-17 2015-06-24 中兴通讯股份有限公司 一种在非以太链路上启用lldp功能的实现方法及系统
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CN102377679B (zh) * 2011-12-06 2014-12-31 烽火通信科技股份有限公司 一种在fttx接入系统中实现链路发现和管理的方法
CN103067277B (zh) 2013-01-06 2016-06-22 华为技术有限公司 建立控制通道的方法、转发设备和控制设备
CN104283802A (zh) * 2014-10-09 2015-01-14 杭州华三通信技术有限公司 邻居发现方法和设备
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CN114521322A (zh) * 2019-10-10 2022-05-20 思科技术公司 动态发现网络中的服务节点
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