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WO2009076848A1 - Procédé et dispositif de découverte automatique de topologie et gestion de ressources dans le réseau pbb - Google Patents

Procédé et dispositif de découverte automatique de topologie et gestion de ressources dans le réseau pbb Download PDF

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Publication number
WO2009076848A1
WO2009076848A1 PCT/CN2008/073301 CN2008073301W WO2009076848A1 WO 2009076848 A1 WO2009076848 A1 WO 2009076848A1 CN 2008073301 W CN2008073301 W CN 2008073301W WO 2009076848 A1 WO2009076848 A1 WO 2009076848A1
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WO
WIPO (PCT)
Prior art keywords
network
resource information
ospf
pbb
node
Prior art date
Legal status (The legal status 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 status listed.)
Ceased
Application number
PCT/CN2008/073301
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English (en)
Chinese (zh)
Inventor
Suping Zhai
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Huawei Technologies Co Ltd
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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.)
Filing date
Publication date
Application filed by Huawei Technologies Co Ltd filed Critical Huawei Technologies Co Ltd
Publication of WO2009076848A1 publication Critical patent/WO2009076848A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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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
    • H04L41/12—Discovery or management of network topologies
    • 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
    • H04L45/02—Topology update or discovery
    • H04L45/03—Topology update or discovery by updating link state protocols

Definitions

  • the present invention relates to the field of computer network technologies, and in particular, to a Provider Backbone Bridge
  • PBB Transmission Engineering
  • PBB speaks Mac-in-Mac in plain language, which means that by encapsulating a layer of media access control (MAC) address in front of a normal Ethernet (Ethernet) frame, it is called the backbone address, which makes the user address and operation.
  • the quotient address is separated.
  • the independence of management can be ensured, and on the other hand, the security of the service can be improved, and the size of the MAC table of the backbone layer device can be greatly reduced, and the complexity of the device implementation can be reduced.
  • traditional point-to-point, point-to-multipoint, multi-point to multi-point Ethernet services can be provided, and the forwarding path is based on Multiple Spanning Tree.
  • MSTP Multiple Spanning Tree Protocol
  • B-VLAN domain calculation For different B-VLANs (Backbone-Virtual)
  • the domain generates different forwarding paths.
  • TE backbone layer access control
  • B-VLAN backbone layer virtual local area network
  • PBB services can be carried on a PBB TE tunnel.
  • the main PBB is to ensure bandwidth management and complexity of implementation.
  • the establishment mechanism of the TE tunnel is implemented through static configuration. In a statically configured tunnel or an actual network deployment, you need to know the entire PBB in advance.
  • the topology and resource information of the TE network not only increases the workload, but also brings the possibility of configuration errors.
  • GMP LS is a tunnel establishment mechanism. It establishes a forwarding tunnel based on existing topology information and resource information in a specified network to carry various services. But in the prior art, for PBB
  • TE network uses GMPLS as PBB
  • the TE tunnel establishment mechanism still has no topology information and resource information collection means. It can only rely on the network to deploy the manually recorded topology information and resource information as the input of the GMPLS signaling protocol.
  • the embodiment of the present invention proposes a PBB.
  • the method for automatically discovering network topology in a TE network includes the following steps:
  • the first network node constructs an open shortest path first OSPF containing network topology information.
  • the first network node receives OSPF that is sent by other network nodes and includes network topology information.
  • the method for managing network resource information in a TE network includes the following steps:
  • the first network node constructs an OSPF protocol link state acknowledgement LSA message containing the resource information, and sends the message to other network nodes in the network;
  • the first network node receives OSPF including resource information sent by other network nodes
  • a PBB according to an embodiment of the present invention
  • the TE network node device includes an interface for interacting with other network nodes, and further includes:
  • a network topology information database configured to store received network topology information
  • the network topology information is extracted, and the network topology information is sent to the network topology information database;
  • Network topology information sending module used to construct an open shortest path priority OSPF containing network topology information
  • the TE network device includes an interface for interacting with other network nodes, and further includes:
  • Resource information collection module for receiving OSPF from the node interface
  • the resource information is extracted, and the resource information is sent to the resource information database; [23] the resource information sending module is configured to construct an OSPF protocol link state confirmation LSA message including the resource information, and The message is sent to other network nodes in the network.
  • the establishment of a TE tunnel provides sufficient information and is of great significance and significance for the QoS guarantee of the service and the deployment of the TE.
  • FIG. 1 is a flowchart of a process of transmitting a network topology information according to a first embodiment of the present invention
  • FIG. 2 is a flowchart of processing at the receiving end for implementing network topology information collection according to a second embodiment of the present invention
  • FIG. 3 is a flowchart of a process of transmitting a resource information according to a third embodiment of the present invention.
  • FIG. 4 is a flowchart of processing at a receiving end for implementing resource information management according to a fourth embodiment of the present invention.
  • FIG. 5 is a structural block diagram of a network node for implementing network topology information collection according to a fifth embodiment of the present invention.
  • FIG. 6 is a structural block diagram of a network node for implementing resource information collection according to a sixth embodiment of the present invention.
  • the embodiment of the present invention extends the OSPF protocol to make PBB
  • TE's network nodes can collect PBB through extended OSPF packets.
  • Topology information and resource information of the TE network are included in the TE network.
  • OSPF is an IP layer-based routing protocol. Its functions include routing network topology discovery, routing network status information collection, and route calculation, and network status dynamic monitoring. There are five types of OSPF packets, which are:
  • Request (link status request) message, used to request state synchronization between neighbor routers when the router status information changes;
  • LSA Acknowledgment
  • the specific extension scheme of the OSPF protocol in this embodiment is as follows.
  • IETF RFC 2370 defines three types of transparent LSAs for transmitting various link state information. The difference between the three types of LSAs is that the scope of flooding is different. Type 9 is used for flooding in links. Type 10 is used. In IS-IS
  • Type 11 is used throughout the IS-IS AS (Autonomous
  • RFC3630 uses the Type 10 pairs of IS-IS extensions, which transmit TE related information, that is, IS-IS TE.
  • the present invention utilizes TYPE
  • TBB TBB
  • TLV Type-Length-Value, type-length-value
  • the TE network transmits the resources to complete the collection and management of resources in the PBB TE network.
  • IP also needs to modify some related information in the protocol to make it applicable to PBB of Layer 2 (Layer 2).
  • the TE network actually modifies some of the fields in the OSPF packet header field (Header).
  • Router ID (router ID) in the header of the OSPF Packet Header and the above five OSPF packets, and Advertising in the LSA
  • Router Router advertisement
  • Router ID field associated with the concept need Laye r 2 instead of corresponding to the network, such as the MAC address, and byte alignment issues need to be considered.
  • the node number in the TE network is replaced with the IP directly with the MAC address.
  • This embodiment uses the extended OSPF Hello message to collect PBB.
  • the topology information in the TE network is specifically as follows:
  • the Neighbor field in the Hello packet passes the neighbor information between the nodes.
  • the destination address of the Hello packet is AllSPFRouters (224.0.0.5). After receiving the packet, all OSPF routers can collect the topology information of the PBB TE network.
  • This embodiment uses the extended transparent LSA Type 11 for PBB
  • the scheme for resource/protection information collection of the TE network is as follows:
  • Traffic engineering information such as resource and protection of the TE port.
  • Type (protection type), as shown in Table 2, used to describe the protection type information corresponding to the port.
  • PBB TE Port MTU is shown in Table 3 and is used to describe the MTU corresponding to this port.
  • Bandwidth Descriptor can be set with reference to Table 5, Delay
  • Metric Setting parameter Set according to system support, if not supported, set to 0.
  • the packet sending process discovered by the TE topology includes the following steps:
  • Step 101 The sender performs OSPF protocol initialization.
  • Step 102 The sender decides to send OSPF
  • the Hello packet carries the network topology information of the sender, including whether to support PBB. TE and corresponding PBB TE port MAC address.
  • the packet receiving process discovered by the TE topology includes the following steps:
  • Step 201 The receiving end performs OSPF protocol initialization
  • Step 202 Receiver receives OSPF
  • Hello packet where the Hello packet carries network topology information of the sender
  • Step 203 The receiving end records the network topology information in the received Hello message into the local network topology information database.
  • a third embodiment of the present invention gives PBB
  • the packet sending process of the TE resource information management includes the following steps:
  • Step 301 The sender judges PBB
  • step 302 Whether the network status of the TE changes, if yes, step 302 is performed, otherwise step 301 is still performed.
  • Step 302 Construct an OSPF LSA packet according to the change of the PBB TE network, the OSPF
  • the LBS packet carries the PBB TE resource information, where the PBB
  • the TE resource information can be in the form of Sub as shown in Table 2 to Table 4.
  • Type that is, a subtype, and sends the constructed OSPF LSA packet.
  • the process of receiving the message of TE resource information management includes the following steps:
  • Step 401 The receiving end receives the OSPF LSA packet.
  • Step 402 The receiving end is based on the PBB in the LSA message.
  • TE information update the local resource information base.
  • the network node includes an interface for interacting with other network nodes, and further includes: [80] a network topology information database 501, configured to store received network topology information; and the network topology information includes a network. Whether the B-MAC address and port of other node ports in the middle support PBB TE.
  • a network topology information collection module 502 configured to receive OSPF from the node interface
  • the network topology information is extracted, and the network topology information is sent to the network topology information database 501.
  • the IP address in the Hello packet header field is replaced with the MAC address, and the network topology information of the node is added to the OSPF.
  • the network topology information sending module 503 may include a sending timer for controlling the sending of network topology information to implement fixed transmission.
  • the TE network node includes an interface for interacting with other network nodes, and further includes: [84] a resource information database 601, configured to store the received resource information;
  • Resource information collection module 602 for receiving OSPF from the node interface
  • the resource information is extracted, and the resource information is sent to the resource information database 60 l o
  • the IP address of the LSA packet header field is replaced with the MAC address, and the resource information of the local node is added to the 0 SPF LSA packet.
  • the establishment of a TE tunnel provides sufficient information and is of great significance and significance for the QoS guarantee of the service and the deployment of the TE.

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Data Exchanges In Wide-Area Networks (AREA)

Abstract

La présente invention concerne un procédé de découverte automatique de topologie et de gestion des informations de ressources dans le réseau PBBTE (ingénierie de trafic pour le pont dorsal du fournisseur), qui comprend les étapes suivantes : le premier nœud de réseau structure un message Hello OSPF (ouverture en premier du chemin le plus court), qui comprend une information de topologie de réseau, ou un message LSA (annonce de l'état du lien) OSPF qui comprend des informations de ressource et l'envoi des messages à un autre nœud; le second nœud de réseau reçoit les messages et enregistre l'information de topologie du réseau ou l'information de ressource des messages dans la base de données des informations de topologie de réseau ou la base de données des informations de ressources. La solution concerne aussi un dispositif de nœud de réseau PBBTE. Le schéma de la solution peut implémenter la découverte de topologie automatique et la gestion d'informations de ressources dans le réseau PBBTE.
PCT/CN2008/073301 2007-12-04 2008-12-02 Procédé et dispositif de découverte automatique de topologie et gestion de ressources dans le réseau pbb Ceased WO2009076848A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN200710195217.2 2007-12-04
CN200710195217A CN101453412B (zh) 2007-12-04 2007-12-04 一种pbb网络中自动拓扑发现及资源信息管理的方法和装置

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WO2009076848A1 true WO2009076848A1 (fr) 2009-06-25

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CN110896377A (zh) * 2019-11-19 2020-03-20 迈普通信技术股份有限公司 一种ospf路由控制方法及装置
CN114257594A (zh) * 2021-12-21 2022-03-29 四川灵通电讯有限公司 对分布式系统中对用户网络侧进行网络资源分配的方法
CN115333949A (zh) * 2022-07-29 2022-11-11 北京国信蓝盾科技有限公司 一种基于窄带网络实现拓扑发现业务模型的方法

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CN102904817B (zh) * 2012-10-24 2015-05-20 福建星网锐捷网络有限公司 链路状态通告发送方法、ospf设备及网络系统
CN106330725A (zh) * 2015-06-19 2017-01-11 中兴通讯股份有限公司 一种实现网络管理的方法和装置
CN108616904B (zh) * 2016-12-21 2021-07-02 上海未来宽带技术股份有限公司 一种无线频点管理方法及系统

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Cited By (5)

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Publication number Priority date Publication date Assignee Title
CN110896377A (zh) * 2019-11-19 2020-03-20 迈普通信技术股份有限公司 一种ospf路由控制方法及装置
CN114257594A (zh) * 2021-12-21 2022-03-29 四川灵通电讯有限公司 对分布式系统中对用户网络侧进行网络资源分配的方法
CN114257594B (zh) * 2021-12-21 2023-12-01 四川灵通电讯有限公司 分布式系统中对用户网络侧进行网络资源分配的方法
CN115333949A (zh) * 2022-07-29 2022-11-11 北京国信蓝盾科技有限公司 一种基于窄带网络实现拓扑发现业务模型的方法
CN115333949B (zh) * 2022-07-29 2023-10-27 北京国信蓝盾科技有限公司 一种基于窄带网络实现拓扑发现业务模型的方法

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CN101453412A (zh) 2009-06-10
CN101453412B (zh) 2012-09-05

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