WO2015184771A1 - Procédé et dispositif de nœud pour l'exploitation, l'administration et la maintenance d'un chaînage de fonctions de service - Google Patents

Procédé et dispositif de nœud pour l'exploitation, l'administration et la maintenance d'un chaînage de fonctions de service Download PDF

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Publication number
WO2015184771A1
WO2015184771A1 PCT/CN2014/094724 CN2014094724W WO2015184771A1 WO 2015184771 A1 WO2015184771 A1 WO 2015184771A1 CN 2014094724 W CN2014094724 W CN 2014094724W WO 2015184771 A1 WO2015184771 A1 WO 2015184771A1
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Prior art keywords
service
sfc
oam
service node
function path
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PCT/CN2014/094724
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English (en)
Chinese (zh)
Inventor
王翠
孟伟
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中兴通讯股份有限公司
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Publication of WO2015184771A1 publication Critical patent/WO2015184771A1/fr

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  • the present invention relates to the field of Internet devices, and in particular, to a method, a node device for implementing a service chain management, management and maintenance (OAM).
  • OAM service chain management, management and maintenance
  • This deployment model of the data center requires that the virtual firewall/load balancer can be deployed arbitrarily in the network, that is, independent of the network topology.
  • the new question is how to handle traffic through the virtual firewall/load balancer. Therefore, new middleware such as virtual firewall/load balancer is generated.
  • These virtual firewall/load balancer and other business processing functions are independent of the original network topology and are implemented by standard servers.
  • the framework of SFC can be basically divided into the following components:
  • Service Overlay that is, Overlay technology that each service function node needs to communicate
  • GCP Generic Service Control Plane
  • the general service control plane is the controller that forms the Service Function Chaining
  • SF Service Function
  • Service Function Forwarder which is responsible for forwarding between multiple internal SFs of the same service node.
  • SFF Service Function Forwarder
  • NSF Network Service Header
  • SFP service function path
  • the SFP starts from the classifier and goes through a number of ordered specific service function instances to reach a service processing path of the destination.
  • the general service control platform GSCP does not know all the service function instances that pass through the path, such as the load sharing scenario or the service service level scenario.
  • the abstract service function chain SFC and the real specific traffic forwarding are passed.
  • a description of such a business function chain between paths formed by an ordered business instance also referred to as a business function path.
  • a service function chain may include multiple service function paths, and different service function paths correspond to different policies.
  • SFC is a kind of separation of network device service functions and forwarding, thus achieving independent operation and processing of service functions, and improving the forwarding performance of network devices.
  • Operation, Management, and Maintenance (OAM) technology is a network transmission protocol for network connectivity detection, fault location, and troubleshooting, and provides a trigger mechanism for protection switching when a failure occurs. It includes the link connectivity detection CV (Connectivity Verification) mechanism, the Ping mechanism to And the Trace mechanism. For different bearer network protocols, there is a corresponding OAM mechanism. For example, Ethernet has an Ethernet OAM protocol, an IP network has an IP OAM protocol, and an MPLS network has an MPLS OAM.
  • the embodiments of the present invention provide a service function chain (SFC) operation, management, and maintenance (OAM) method and a node device to solve the problem that an operator cannot implement various SFC OAMs simply and quickly.
  • SFC service function chain
  • OAM management, and maintenance
  • a business function chain (SFC) operation, management, and maintenance (OAM) method including:
  • the source service node performs an OAM operation on the determined SFC or the service function path, and generates a corresponding OAM message and sends the message to the destination service node of the OAM operation.
  • the method further includes: configuring, by the source service node, the alias information of the SFC or the service function path in the SFC domain, and the binding relationship between the SFC or the service function path corresponding to the alias information; or
  • the source service node receives, from the universal service platform controller, the alias information of the SFC or the service function path in the SFC domain, and the binding relationship between the SFC or the service function path corresponding to the alias information;
  • the alias information of the SFC or service function path is unique within the SFC domain.
  • the source service node generates a corresponding OAM packet and sends the corresponding OAM packet.
  • the destination service node includes:
  • the source service node parses the OAM operation, and obtains the number M of service nodes that the OAM packet corresponding to the OAM operation needs to go through, and the determined SFC or the service function path after the source service node M service nodes are determined as destination service nodes, and M is a positive integer;
  • the source service node sends the generated OAM message to the destination service node through the service node on the determined SFC or service function path.
  • the source end node device determines the last service node on the determined SFC or service function path as the destination service node.
  • the source service node is a service classifier, or is any one of the service nodes in the SFC or service function path.
  • the embodiment of the invention further discloses a service node device, including:
  • a first unit configured to: when the service node device performs an operation, management, and maintenance (OAM) operation on the alias information, determine a service function chain (SFC) or a service function path that is bound to the alias information; as well as
  • OAM operation, management, and maintenance
  • a second unit configured to: perform an OAM operation on the SFC or the service function path determined by the first unit, generate a corresponding OAM message, and send the message to the destination service node of the OAM operation.
  • a third unit configured to: configure an alias information for the SFC or the service function path in the SFC domain, and a binding relationship between the SFC or the service function path corresponding to the alias information; or
  • the alias information of each SFC or service function path is unique within the SFC domain.
  • a parsing module configured to: parse the OAM operation, obtain the number M of service nodes that the OAM packet corresponding to the OAM operation needs to go, and determine the SFC or the service function path after the source service node The Mth service node is determined to be the destination service node, and M is positive. Integer; and
  • a sending module configured to: send the generated OAM message from the source service node to the destination service node by using the determined service node on the SFC or the service function path.
  • FIG. 2 is a schematic diagram of a format of a service function packet header
  • FIG. 8 is a schematic diagram of an SFC Trace function initiated by an intermediate node according to an embodiment of the present invention.
  • FIG. 10 is a schematic structural diagram of a node device according to an embodiment of the present invention.
  • This embodiment provides an OAM method for an SFC, including the following operations:
  • the source node device performs an SFC OAM operation on the determined SFC or the service function path, and generates a corresponding OAM packet and sends it to the destination service node of the OAM operation.
  • the SFC OAM in this embodiment may include an SFC ping function, or an SFC Trace function, or an SFC BFD function, or an SFC connectivity detection function, and the implementation mechanism may follow the relevant specifications of the SFC OAM.
  • the node device involved in this embodiment may be a service classifier, or any one of a service function chain or a service function path.
  • the alias information, and the binding relationship between the alias information and the corresponding SFC or the service function path may be uniformly sent to the service node by the general service platform controller, or may be statically configured locally at the service node.
  • the source service node first parses the OAM operation, and obtains the number M of service nodes that the OAM packet corresponding to the OAM operation needs to go through, and determines the SFC or the service function path on the source end.
  • the Mth service node after the service node is determined as the destination service node, and M is a positive integer;
  • the SFC Ping-based service is initiated by the head node as the source service node with the hop limit (that is, the number of service nodes that the OAM packet needs to go through is less than the number of service nodes in the entire service function chain).
  • the functional chain includes: SF2--->SF3--->SF4;
  • the complete path of the service function chain includes: SF3--->SF4--->SF5;
  • the intermediate node service function 3 When the intermediate node service function 3 is used as the SFCTrace function initiated by the source service node of the OAM operation, it is no longer necessary to know the IP address of the last hop service function, but only needs to operate on the service node 3 as follows:
  • the source service node SF3 resolves the OAM operation, the number of service nodes that the packet needs to go through may not be obtained.
  • the default is the remaining service function chain after starting from the source service node.
  • the OAM operation is performed, that is, the last service node SF5 of the service function chain is used as the destination service node.
  • Data Center 1 Datacenter1
  • the IP of the second hop service function is no longer needed. What is the address, and only need to operate on business node 4 as follows:
  • this embodiment provides a node device, which can implement the foregoing method, and at least includes the following units.
  • the first unit determines a service function chain (SFC) or a service function path bound to the alias information when the device performs an operation, management, and maintenance (OAM) operation on the alias information;
  • SFC service function chain
  • OAM operation, management, and maintenance
  • the second unit performs an OAM operation on the SFC or the service function path determined by the first unit, generates a corresponding OAM message, and sends the corresponding OAM message to the destination service node of the OAM operation.
  • the device may further include: a third unit, configured to configure alias information for the SFC or the service function path in the SFC domain, and a binding relationship between the alias information and the corresponding SFC or the service function path; or from the general service platform controller Receiving and storing the alias information of the SFC or the service function path in the SFC domain, and the binding relationship between the alias information and the corresponding SFC or service function path; wherein the alias information of each SFC or service function path is unique within the SFC domain.
  • a third unit configured to configure alias information for the SFC or the service function path in the SFC domain, and a binding relationship between the alias information and the corresponding SFC or the service function path
  • the general service platform controller Receiving and storing the alias information of the SFC or the service function path in the SFC domain, and the binding relationship between the alias information and the corresponding SFC or service function path; wherein the alias information of each SFC or service function path is unique within the
  • the second unit may be further divided into a parsing module and a sending module.
  • Parsing the module parsing the OAM operation, obtaining the number M of service nodes that the OAM message corresponding to the OAM operation needs to pass, and determining the Mth service node after the source service node on the determined SFC or service function path as the destination End service node;
  • the sending module sends the generated OAM message from the source service node to the destination service node through the determined SFC or the service node on the service function path.
  • the foregoing device may be a service classifier, or an SFC or any one of the service node devices in the service function chain, and the method of the foregoing Embodiment 1 may be implemented. Therefore, refer to the corresponding operation of the foregoing Embodiment 1 for the specific operation of the foregoing device. The content will not be described here.
  • all or part of the steps of the foregoing embodiments may also be implemented by using an integrated circuit, and the steps may be separately fabricated into integrated circuit modules, or multiple modules thereof or The steps are made into a single integrated circuit module.
  • the invention is not limited to any specific combination of hardware and software.
  • the embodiment of the invention can enable the operator to obtain the link information of the service chain simply and quickly, and diagnose and locate the link information of the service chain, thereby implementing various SFC OAMs simply and quickly.

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Abstract

L'invention concerne un procédé et un dispositif de nœud pour l'exploitation, l'administration et la maintenance (OAM) d'un chaînage de fonctions de service (SFC). Le procédé comprend les étapes consistant à : lorsqu'un nœud de service source est en train d'exécuter une opération OAM pour des informations d'alias, le nœud de service source détermine soit un SFC, soit un chemin de fonction de service qui est lié aux informations d'alias; et le nœud de service source effectue une opération OAM sur le SFC déterminé ou le chemin de fonction de service déterminé, génère un paquet OAM correspondant et l'envoie à un nœud de service de destination de l'opération OAM.
PCT/CN2014/094724 2014-10-17 2014-12-23 Procédé et dispositif de nœud pour l'exploitation, l'administration et la maintenance d'un chaînage de fonctions de service WO2015184771A1 (fr)

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CN201410555367.XA CN105577416B (zh) 2014-10-17 2014-10-17 一种业务功能链操作、管理和维护方法及节点设备
CN201410555367.X 2014-10-17

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US20180034703A1 (en) * 2016-07-26 2018-02-01 Cisco Technology, Inc. System and method for providing transmission of compliance requirements for cloud-based applications
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FR3081644A1 (fr) * 2018-06-22 2019-11-29 Orange Procede de decouverte de fonctions intermediaires et de selection d'un chemin entre deux equipements de communication
CN112511437B (zh) * 2020-04-22 2024-03-22 中兴通讯股份有限公司 验证业务链的方法、发送节点、转发节点、业务功能节点

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