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WO2012106872A1 - Procédé, dispositif d'agrégation et système pour mettre en œuvre un contrôle de continuité - Google Patents

Procédé, dispositif d'agrégation et système pour mettre en œuvre un contrôle de continuité Download PDF

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Publication number
WO2012106872A1
WO2012106872A1 PCT/CN2011/076922 CN2011076922W WO2012106872A1 WO 2012106872 A1 WO2012106872 A1 WO 2012106872A1 CN 2011076922 W CN2011076922 W CN 2011076922W WO 2012106872 A1 WO2012106872 A1 WO 2012106872A1
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WO
WIPO (PCT)
Prior art keywords
connection
convergence
access
segment
lsp
Prior art date
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PCT/CN2011/076922
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English (en)
Chinese (zh)
Inventor
黄勇
Original Assignee
华为技术有限公司
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 华为技术有限公司 filed Critical 华为技术有限公司
Priority to CN201180001325.6A priority Critical patent/CN102308526B/zh
Priority to PCT/CN2011/076922 priority patent/WO2012106872A1/fr
Publication of WO2012106872A1 publication Critical patent/WO2012106872A1/fr

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L43/00—Arrangements for monitoring or testing data switching networks
    • H04L43/08—Monitoring or testing based on specific metrics, e.g. QoS, energy consumption or environmental parameters
    • H04L43/0805—Monitoring or testing based on specific metrics, e.g. QoS, energy consumption or environmental parameters by checking availability
    • H04L43/0811—Monitoring or testing based on specific metrics, e.g. QoS, energy consumption or environmental parameters by checking availability by checking connectivity
    • 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
    • H04L41/06—Management of faults, events, alarms or notifications
    • H04L41/0677—Localisation of faults
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L43/00—Arrangements for monitoring or testing data switching networks
    • H04L43/10—Active monitoring, e.g. heartbeat, ping or trace-route
    • 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
    • H04L45/50—Routing or path finding of packets in data switching networks using label swapping, e.g. multi-protocol label switch [MPLS]

Definitions

  • the present invention relates to the field of MPLS (Multi Protocol Label Switching) networks, and in particular, to a method, a convergence device and a system for implementing connectivity detection.
  • MPLS Multi Protocol Label Switching
  • connection-oriented MPLS technology has become the mainstream in the access convergence network.
  • the pipelined transmission capability provided by MPLS is consistent with the management of the access aggregation network service flow.
  • the QoS (Quality of Service) and OAM (Operation Administration) And Maintenance, Operation, Management, and Maintenance) Capabilities provide high-performance network connectivity services.
  • the mobile service bearer network deploys a large number of pipes in the access convergence section.
  • OAM connectivity detection refers to real-time connectivity detection, also known as OAM CC (OAM Continuity Check, operation management and maintenance connectivity detection).
  • the embodiment of the present invention provides a method, a convergence device, and a system for implementing connectivity detection.
  • the technical solution is as follows:
  • a method for implementing connectivity detection where the communication network includes an access device, a convergence device, and a convergence gateway device, where the access device is an access segment to the convergence device, and the convergence device is to the convergence gateway.
  • the device is a convergence segment
  • the communication network further includes a first connection and a second connection, where the first connection and the second connection are commonly routed in the convergence segment, where each of the first connections Corresponding to the access device, the first connection starts from the access device, traverses the convergence device, and ends in the convergence gateway device, where the second connection starts from the convergence
  • the device is terminated by the convergence gateway device, and the method includes:
  • connection identifier of the failed first connection is transmitted to the convergence gateway device by using the second connection, so that the convergence gateway device performs corresponding fault processing
  • connection failure message is transmitted to the access device through the first connection, so that the access device performs corresponding fault processing.
  • a convergence device comprising: a first connectivity detection module, a second connectivity detection module, and a failure notification module, where the first connectivity detection module is configured to access the first connection with the access device
  • the second connectivity detecting module is configured to perform connectivity check with the convergence gateway device on the second connection
  • the failure notification module is configured to be used in any one of the first connections.
  • the connection identifier of the failed first connection is transmitted to the convergence gateway device through the second connection, so that the convergence gateway device performs corresponding fault processing
  • the failure notification module is further configured to be used when When the two connections fail, the connection failure message is transmitted to the access device through the first connection, so that the access device performs corresponding fault processing.
  • a system for implementing connectivity detection comprising: an access device, the foregoing convergence device, and a convergence gateway device, where the access device is an access segment between the convergence device, and the convergence device is connected to the convergence gateway device.
  • the first connection and the second connection are further included in the communication network, where the first connection and the second connection are common to the convergence segment, where each of the first connections corresponds to In the access device, the first connection starts from the access device, traverses the convergence device, and ends in the convergence gateway device, where the second connection starts from the convergence device, and ends at the
  • the convergence gateway device runs connectivity detection on the access segment and the second connection of the first connection, respectively.
  • the OAM CC is respectively operated by the access segment connection and the second connection of the first connection, and when the first connection fails, the connection failure message is carried on the second connection to notify the MASG, so that the MASG performs corresponding fault processing, and
  • the failure of the MASG detection such as an AC (Attachment Circuit) fault, is notified to the AGG through the first connection. Since the number of the second connection is generally much smaller than the first connection, a large number of OAM CC messages are restricted.
  • the access segment operates to alleviate the OAM CC packet processing pressure faced by MASG, implements E2E OAM connectivity detection, and improves communication efficiency and performance.
  • Figure 1 is an E2E pipeline deployment scenario in which a communication network is in an access convergence segment; 2 is a flowchart of a method for implementing connectivity detection according to an embodiment of the present invention
  • FIG. 3 is a schematic diagram of constructing connectivity detection in an MS-PW scenario according to an embodiment of the present invention.
  • FIG. 4 is a flowchart of a method for implementing connectivity detection according to an embodiment of the present invention.
  • FIG. 5 is a flowchart of a method for implementing connectivity detection according to an embodiment of the present invention.
  • FIG. 6 is a schematic diagram of constructing connectivity detection in an SS-PW scenario according to an embodiment of the present invention.
  • FIG. 7 is a flowchart of a method for implementing connectivity detection according to an embodiment of the present invention.
  • FIG. 8 is a flowchart of a specific process of setting an LDP proxy and establishing a PW at a control plane in an SS-PW scenario according to an embodiment of the present invention
  • FIG. 9 is a schematic diagram of constructing connectivity detection in a BFD scenario according to an embodiment of the present invention.
  • FIG. 10 is a flowchart of a method for implementing connectivity detection according to an embodiment of the present invention.
  • 11a is a schematic diagram of a format of a connection failure message provided by the present invention.
  • FIG. 1 is a schematic diagram of a format of a flag connecting a failure message according to an embodiment of the present invention
  • FIG. 12 is a schematic structural diagram of a convergence device according to an embodiment of the present disclosure.
  • FIG. 13 is a schematic structural diagram of a convergence device according to an embodiment of the present disclosure.
  • FIG. 14 is a schematic structural diagram of a convergence device according to an embodiment of the present disclosure.
  • FIG. 15 is a schematic structural diagram of a system for implementing connectivity detection according to an embodiment of the present invention. detailed description
  • FIG 1 shows the E2E pipeline deployment scenario of the mobile bearer network in the access convergence segment.
  • the communication network usually consists of a two-level network, an access network that accesses the base station, and a convergence network that aggregates traffic.
  • 2G/3G/LTE Long Term Evolution
  • the base station and the CSG use the PW technology to transmit services to the BNC through the El/ATM (Asynchronous Transfer Mode) / FE (Fast Ethernet) interface.
  • RNC/aGW access GW, access gateway.
  • Each MASG device aggregates service flows of multiple AGG (AGGregate node) devices, and each AGG device aggregates multiple CSG service flows, one for each CSG. Or several base stations, which send the mobile service flow uploaded by the base station.
  • CSG can also be called AN (Access Network), and MASG is called AG (Aggregate Gateway).
  • FIG. 2 is a flowchart of a method for implementing connectivity detection according to an embodiment of the present invention.
  • the communication network includes an access device, a convergence device, and a convergence gateway device, where the access device is an access segment between the convergence device, and the convergence device is a convergence segment between the convergence gateway devices, and the communication network further includes a first connection and a second connection, the first connection and The second connection is a common route in the convergence segment, where each of the first connections corresponds to the access device, and the first connection starts from the access device, traverses the convergence device, and terminates in the convergence gateway device. The second connection starts from the convergence device and ends in the convergence gateway device.
  • the method includes:
  • first connection may be multiple, and the multiple first connections may start from the same access device or start from different access devices.
  • a backup connection is established between the access device and the backup device, and the present invention does not describe the present invention.
  • the second connection is a one or a limited number of strips, the number of which is generally much smaller than the first connection.
  • the first connection and the second connection are co-routed in the convergence segment.
  • the network path of the client layer connection and the service layer is the same, which is called common routing, that is, the same network device and physical link are in the same order.
  • the two common routing connections do not necessarily have a relationship between the client layer and the service layer.
  • the first connection is a client layer connection
  • the second connection is a service layer connection.
  • a person skilled in the art can know that the relationship between the client layer connection and the service layer connection means that when a certain connection C passes through a certain network segment, the data of the connection C and the corresponding connection information are used as data, and the connection is carried to another connection S. Transfer on top. Connection C is called a client layer connection, and connection S is called a service layer connection.
  • the client layer connection can be a physical link, such as transmitting an E1/T1 physical link over a PW connection, see RFC4553; the client layer connection can also be a logical link, such as one or more ATM PVCs (Permanence Virtual Circuit, fixed virtual connection) is transmitted over a PW connection, see RFC4717.
  • a physical link such as transmitting an E1/T1 physical link over a PW connection, see RFC4553
  • the client layer connection can also be a logical link, such as one or more ATM PVCs (Permanence Virtual Circuit, fixed virtual connection) is transmitted over a PW connection, see RFC4717.
  • ATM PVCs Permanence Virtual Circuit, fixed virtual connection
  • the first connection is an MS-PW (Multi-Segment Pseudo Wire, Multi-Segment PW) or an SS-PW (Sigle Segment PW)
  • the second connection is a management PW, LSP
  • the first connection is an LSP
  • the second connection is an H-LSP
  • the first connection may be the same as the first connection, or the TP-LSP (Transport Profile LSP).
  • TP-LSP Transport Profile LSP
  • the LSP may be established based on the MPLS, or may be established based on the MPLS-TP technology.
  • the LSP established by the traditional MPLS technology is called an LSP
  • the LSP established by the MPLS-TP technology is called a TP-LSP.
  • Both the segment and the convergence segment use the LSP, or both the access segment and the convergence segment use the TP-LSP, or the access segment uses the TP-LSP, and the convergence segment uses the LSP, which is not specifically limited in the embodiment of the present invention.
  • connection identifier of the failed first connection is sent to the convergence gateway device by using the second connection, so that the convergence gateway device performs corresponding fault processing.
  • connection identifier is carried in the connection failure message, and the connection identifier is a base address and a bitmap of the first connection that identifies the failure.
  • connection failure message When the second connection fails, send a connection failure message to the access device by using the first connection, so that the connection is Enter the device for corresponding troubleshooting.
  • the fault processing includes performing protection switching on the first connection, and the like.
  • the method provided in this embodiment by operating the OAM CC in the access segment connection and the second connection of the first connection, respectively, and notifying the MASG when the first connection fails, and the connection failure message is carried on the second connection, so that the MASG
  • the corresponding fault is processed, and the fault detected by the MASG, such as an AC (Attachment Circuit) fault, is notified to the AGG through the first connection. Since the number of the second connection is generally much smaller than the first connection, a large amount will be
  • the OAM CC packet is restricted to the access segment, which relieves the OAM CC packet processing pressure faced by the MASG, and implements the E2E OAM connectivity detection, which improves communication efficiency and performance.
  • FIG. 3 is a schematic diagram of constructing connectivity detection in an MS-PW scenario according to an embodiment of the present invention.
  • FIG. 4 is a flowchart of a method for implementing connectivity detection according to an embodiment of the present invention.
  • the interaction subject in this embodiment includes CSG, AGG and MASG, and the first connection starts from CSG or AN (only one AN is drawn in FIG. 4), traverses the AGG, and ends at the MASG.
  • MS-PW, the MS-PW consists of two PWs, the access segment PW segl and the convergence segment PW seg2, and the second connection is the TP-LSP starting at the AGG and ending at the MASG.
  • the method for implementing the connectivity detection specifically includes: 401: Running an OAM CC on the access segment PW segl and the second connection TP-LSP of the first connection respectively.
  • the LSP is used for access
  • the convergence segment is used.
  • the TP-LSP is used as an example to describe the operation of the OAM CC on the first connected access segment PW segl and the second connected TP-LSP.
  • the access segment pw segl is carried on the access segment LSP, and the traffic is still running on the MS-PW.
  • fast CC detection is only performed on the pw segl.
  • the TP-LSP of the convergence segment can carry the convergence segment of multiple MS-PWs.
  • the convergence segment does not run the CC at the PW level, and only runs the OAM CC on the TP-LSP.
  • the second connection may be one or more.
  • the second connection is a TP-LSP. Since the TP-LSP is unidirectional, at least two TP-LSPs need to be established for one AGG.
  • the uplink TP-LSP and the downlink TP-LSP are included, and the OAM detection of all PW convergence segments on the AGG to the MASG is performed by using the CC of the TP-LSP.
  • the second connection may be a management PW that is co-routed with the convergence segment of the first connection.
  • the OAM CC detection mechanism of the access segment PW layer detects the Ijpw segl fault; 403.
  • the AGO encapsulates the MS-PW identifier of the first connection A that is disconnected into a connection failure message, and sends the connection failure message to the MASG through the corresponding convergence segment TP-LSP.
  • the first connection A The MS-PW identifier is a connection identifier of the first connection, and the connection identifier is carried in the connection failure message when transmitting, and the connection failure message may be an OAM message.
  • the AGG finds the convergence segment TP-LSP corresponding to the MS-PW, and encapsulates the MS-PW identifier of the disconnection in the AGG, and encapsulates the OAM message, and transmits the OAM message to the corresponding convergence segment TP-LSP.
  • the second connection may be multiple.
  • the AGG stores the correspondence between the first connection and the second connection. The correspondence may be manually set or automatically generated by the system.
  • the AGG queries the locally saved correspondence according to the MS-PW to obtain the corresponding TP-LSP of the convergence segment, and then sends the connection failure message to the convergence gateway device through the obtained convergence segment TP-LSP.
  • the identifier of the MS-PW may be the PW identifier ID corresponding to the FEC type 128, or may be the MS-PW identifier ID (GAII, SAIL TAII) corresponding to the FEC type 129, and the FEC 128, 129 can be found in RFC4447.
  • the connection identifier of the first connection is an SS-PW identifier.
  • the MASG After receiving the connection failure message, the MASG obtains the fault information of the MS-PW and performs fault processing at the PW level.
  • the fault processing may include performing a protection switching operation of the PW, and notifying the AC side to perform the linkage switching of the AC.
  • the AC refers to the physical or virtual link connected to the CE or PE.
  • the link data packet is transmitted in the network through the PW. See definition of RFC3985 for a detailed definition. It can be known by those skilled in the art that the AC side refers to the user side to which the access device is connected or the network side to which the convergence gateway device is connected.
  • An AGG can detect multiple PW faults of the first connected access segment at the same time, and a connection failure message can carry multiple PW connection failure messages to the MASG, so that the MASG learns the fault information of multiple PWs.
  • the second connection fails. Referring to FIG. 5, the specific process is as follows: 501. Run OAM on the first connected access segment pw segl and the second connected TP-LSP respectively. CC;
  • the convergence device AGG detects the fault in the OAM CC detection mechanism at the TP-LSP level of the convergence segment.
  • the convergence device AGG queries the local TP-LSP and the PW corresponding table according to the connection identifier of the failed convergence segment, and obtains all PWs on the TP-LSP of the access segment, and transmits a connection failure message to all PWs.
  • the correspondence table between the TP-LSP and the PW is stored in the AGG, and the correspondence between the first connection and the second connection is saved in the correspondence table, that is, the relationship between the connection between the access segment and the convergence segment.
  • the relationship between the TP-LSP and the PW is specifically mentioned. Since the second connection and the first connection are co-routed in the convergence segment, when the convergence link or the MASG fails, all the first connections corresponding to the second connection are also invalid, and all the corresponding first connection initiation needs to be notified. Access device.
  • the access device performs a corresponding operation.
  • the access device when the access device receives the connection failure message, it switches to the backup link according to the connection failure message, for example, on the backup PW.
  • the connection failure message is an AIS (Alarm Indication Signal) signal, or an RDI (Remote Defect Indication) signal, an AIS/RDI transmission mechanism, and a protection switching mechanism for performing handover, etc., which are not described in detail.
  • the MASG fails on the AC side of the MS-PW, the MASG passes the connection failure message carrying the IMS-PW to the AGG, and the AGG passes the PW OAM.
  • the connection failure message (such as: RDI or CFI signal) notifies the CSG, triggering the protection switching of the CSG.
  • the OW CC detection at the LSP level of the convergence segment and the use of the connection failure message are used to notify the PW layer of the fault, and the E2E OAM detection of the PW is implemented, and a large number of OAM CC interactions are not required between the AGG and the MASG. If an AGG converges on hundreds of PWs, the OAM performance processing requirements on MASG can be reduced by more than 100 times. Greatly alleviate the pressure of OAM processing performance. In addition, it can be seen that the above implementation can avoid implementing multiple PW OAM instances in the MASG, and reducing the complexity of the MASG.
  • the method provided in this embodiment by operating the OAM CC in the access segment connection and the second connection of the first connection, respectively, and notifying the MASG when the first connection fails, and the connection failure message is carried on the second connection, so that the MASG
  • the corresponding fault is processed, and the fault detected by the MASG, such as an AC (Attachment Circuit) fault, is notified to the AGG through the first connection. Since the number of the second connection is generally much smaller than the first connection, a large amount will be
  • the OAM CC packet is restricted to the access segment, which relieves the OAM CC packet processing pressure faced by the MASG, and implements the E2E OAM connectivity detection, which improves communication efficiency and performance.
  • the interaction subject in this scenario includes CSG, AGG, and MASG.
  • the first connection starts at CSG, traverses the AGG, and ends at the SS-PW of the MASG, and establishes E2E (End to End) from the CSG through the AGG to the MASG. End) LSP, the E2E LSP is used to carry the SS-PW.
  • the E2E OAM needs to be run on the PW or on the E2E LSP.
  • the second connection is an LSP that starts at the AGG and ends at the MASG. The LSP can be established between the AGG and the MASG.
  • H-LSP Hierarchy LSP
  • the H-LSP is specifically referred to as the LSP carrying the LSP.
  • the LSP can also be other LSPs that are co-routed with the first connection in the convergence segment. It should be noted that the established E2E LSP is carried on the H-LSP in the convergence segment.
  • the convergence device in order to implement PW label sensing on the AGG and implement OAM negotiation for different OAM modes, the convergence device, the base station gateway, and the aggregation gateway device need to be configured as follows: the convergence device and the base station gateway respectively
  • the convergence gateway device establishes a LDP (Label Distribute Protocol) connection, negotiates with the base station gateway to perform connectivity detection on the single-segment pseudowire, and does not perform connectivity detection with the convergence gateway device (see Figure 8 for the specific establishment process).
  • LDP Label Distribute Protocol
  • the LDP protocol is running on the AGG device.
  • the LDP proxy is a T-LDP proxy set from the CSG to the MASG (Target LDP see RFC4447, it means that LDP is established between two directly connected devices. Peer relationship, so called T-LDP proxy, also known as T-LDP proxy, T-LDP-proxy establishes T-LDP control connection with CSG accessed from this AGG, and runs MASG on the other hand.
  • T-LDP process establishes a connection.
  • the AGG device is configured as a proxy device for the T-LDP connection to the peer device.
  • the T-LDP signaling connection is established with the T-LDP proxy device AGG, and the T-LDP connection is not established with the peer.
  • the T-LDP proxy receives the OAM information of the PW.
  • the OAM CC mechanism is used to detect connectivity when negotiating OAM with the CSG.
  • the T-LDP proxy does not use OAM when negotiating OAM with the MASG.
  • the negotiation refers to the manner in which the T-LDP proxy and the MASG use the LDP signaling to determine the CC used by the two parties in the interaction process.
  • FIG. 7 is a flow chart of a method for implementing connectivity detection according to an embodiment of the present invention.
  • the connectivity detection method includes:
  • the AGG listens to the OAM packet of the PW transmitted from the access segment.
  • the OAM is also used in the LSP to perform the OAM process. The effect is similar to the PW. OAM for explanation.
  • the connection identifier of the failed PW is carried in the connection failure message and sent to the H-LSP termination device, so that the termination device performs corresponding fault processing.
  • the H-LSP termination device is a PW endpoint device.
  • the H-LSP termination device is a MASG.
  • a connection failure message (such as RDI (Remote Defect Indication) is sent to all access segments PW. Remote fault indication) Message) Notifies the PW of the fault.
  • FIG. 8 is a flowchart of a specific process of setting an LDP proxy and establishing a PW at a control plane in an SS-PW scenario according to an embodiment of the present invention. Referring to FIG. 8, the process specifically includes:
  • the CSG and the MASG wish to establish an LDP connection with the T-LDP located in the AGG.
  • the proxy establishes an LDP connection.
  • the MASG establishes an LDP connection with the T-LDP proxy in the AGG to establish a T-LDP connection relationship between the CSG, the AGG, and the MASG.
  • the CSG When the CSG establishes a PW to the MASG, the CSG initiates a label mapping label mapping message on the T-LDP connection established with the AGG.
  • the label mapping message includes the PW identifier information (FEC 0x80 or FEC 0x81).
  • the PW tag value which also includes the OAM negotiation information, is used to indicate the relevant parameters required for running the OAM connectivity detection.
  • OAM parameter definition is detailed in RFC 5085, and the label mapping message carries the MASG. IP address to indicate the final signaling recipient.
  • the AGG After receiving the label mapping message, the AGG records the PW label value and the PW identifier information, and associates with the LSP and the convergence segment H-LSP carried by the PW into the relationship table (downward direction);
  • the AGG sends a label mapping message on the T-LDP signaling connection established with the MASG.
  • the label mapping message includes the same PW identifier information and PW label value received in step 803.
  • the T-LDP signaling indicates that the OAM connectivity detection is not running between the AGG and the MASG. Those skilled in the art can know that this indication can be defined by a special signaling code, or simply delete the relevant OAM negotiation information to indicate that OAM connectivity detection is not running.
  • AGG carries the IP address of the CSG in the label mapping message.
  • the MASG After receiving the label mapping message sent by the AGG, the MASG uses the IP address of the CSG to find the corresponding E2E LSP, and sends an LDP label mapping message to the AGG.
  • the label mapping message includes the PW identifier information.
  • the FEC80 type the information is the same as the received PW identification information.
  • the ⁇ information is opposite to the received PW identification information.
  • the PW label the label mapping message carries the IP address of the CSG;
  • the AGG After receiving the LDP Label mapping message sent by the MASG, the AGG sends a Label mapping message to the CSG.
  • the Label mapping message carries the IP address of the MASG, in addition to the normal PW id and PW labeK OAM negotiation parameters, to help the CSG find the correct one. LSP.
  • the AGG saves the PW label and the corresponding LSP label in the AGG, and preferably saves it as a correspondence table (upstream direction).
  • the connectivity check is performed, the received packet is detected.
  • the packet is an OAM packet, and the packet is an OAM packet.
  • the message is processed by the OAM CC.
  • the CSG After receiving the LDP Lable mapping message sent by the AGG, the CSG is successfully established and can transmit data.
  • the subsequent processing method for performing connectivity detection and failure of the connection is similar to the embodiment shown in FIGS. 4 and 5, and details are not described herein again.
  • OAM CC described in the present invention can be implemented in various manners, such as MPLS OAM (ITU-T Y.1711 standard), BFD (draft-ietf-bfd-base-l l.txt) , draft-ietf-bfd-mpls-07.txt), OAM CC packets on the converged network can also run on the LSP or PW with the same route as the PW.
  • MPLS OAM ITU-T Y.1711 standard
  • BFD draft-ietf-bfd-base-l l.txt
  • draft-ietf-bfd-mpls-07.txt draft-ietf-bfd-mpls-07.txt
  • OAM CC packets on the converged network can also run on the LSP or PW with the same route as the PW.
  • the PW connection failure message is not necessarily based on the CFI signal transmitted on the H-LSP, and may also be based on control signaling such as LDP, or the failure signal of the associated failed PW is transmitted through the LSP or PW on the convergence network that is routed with the PW.
  • the AGG can obtain the SS-PW related information from the CSG establishment to the MASG, and use the OAM information negotiation to run the OAM CC to monitor the access segment connection status between the CSG, and can also use the saved CSG uplink LSP and
  • the PW label information is used to intercept OAM CC packets for OAM processing.
  • the AGG detects the failure and encapsulates the failed PW ID into the connection failure message, and sends a connection failure message on the H-LSP to notify the MASG.
  • the embodiment of the present invention is the same as the process of performing OAM CC detection in the embodiment shown in FIGS. 3 and 5 and the subsequent processing method when the connection fails, and the difference from the embodiment shown in FIGS. 3 and 5 is that The present invention sets the CSG, AGG, and MASG before the OAM CC, so that the AGG can intercept the connection between the CSG and the MASG to perform OAM management according to the connection.
  • the access device is used as the base station gateway CSG as an example for description.
  • FIG. 9 is a schematic diagram of constructing connectivity detection in a BFD (Bidirectional Forwarding Detection) scenario according to an embodiment of the present invention.
  • the BFD is used as the PW OAM CC, and a PW (called a management PW) of the same route is used on the convergence network, and the connection failure message of the PW in the access network is transmitted by using the LDP protocol.
  • the CSG1 establishes the first connection PW1 through the AGG to the MASG
  • the CSG2 establishes the first connection PW2 through the AGG to the MASG.
  • the PW1 and the PW2 use the same route in the network from the AGG to the MASG, that is, in this embodiment,
  • the first connection and the second connection are co-routed in the convergence segment, and the packet forwarding path is the same.
  • the CSG deploys the BFD peer relationship between the CSG and the AGG.
  • FIG. 10 is a flowchart of a method for implementing connectivity detection according to an embodiment of the present invention, where the embodiment specifically includes:
  • the BFD connectivity detection is performed on the access segment of the PW1 and PW2, and the OAM connectivity detection is run on the management PW on the convergence segment.
  • the AGG obtains a PW1 connection failure message by detecting BFD connectivity between the PW and the CSG.
  • the AGG transmits the failure information of the PW1 to the MASG through an LDP signaling, where the LDP signaling message carries the PWl connection identifier.
  • the LDP signaling further carries the CSG1 IP address information, so that the MASG correctly identifies the PW1.
  • the LDP signaling message is a connection failure message provided by an embodiment of the present invention, and may be a notification message.
  • the MASG After receiving the LDP signaling message, the MASG can obtain the PW1 identification information and the CSG1 IP address information from the LDP signaling message, so that the PW1 is correctly found and the corresponding fault processing is performed.
  • the fault handling may include alerting the network management or PW1 protection switching for PW1.
  • the management PW established between the AGG and the MASG is routed with PW1 and PW2, and the OAM CC detection is performed on the management PW between the AGG and the MASG.
  • AGG can detect the disconnection event by managing the OAM CC of the PW, and find PW1 and PW2 through the association relationship between the management PW and PW1/PW2 established in the AGG.
  • AGG sends PW OAM on all PWs associated with the management PW
  • the message advertisement corresponds to the PW connection failure message.
  • the specific trigger signal can be a BDI signal.
  • the PW connection failure message can also be transmitted to the AGG by using the LDP signaling message, and the AGG notifies the CSG side to implement the protection switching by using the OAM information of the corresponding PW.
  • FIG. 11a is a schematic diagram of a format of a connection failure message provided by the present invention.
  • the connection failure message may be defined as an AFI (Association Failure Indication) signal, and the AFI signal carries identification information or CSG IP address information of one or more PWs.
  • the AFI signal is defined to facilitate fast hardware processing and can be fixed length.
  • Each AFI signal can carry one or more PW failure information.
  • AFI Association Failure Indication
  • the connection identifier of the failed PW is filled in the AFI signal.
  • the PW GROUP ID, PW ID needs to be carried, for the FEC129 type (see RFC4447).
  • connection failure message indicating a connection identifier by using a base address and a bitmap is provided, which can be commonly used in a PW or an LSP.
  • the AFI signal uses the OAM header of the MPLS-TP standard (RFC5586), which is the first 32bi of the AFI OAM message, and the subsequent content is the AFI message definition content. Subsequent content can also be defined in other OAM headers to form a new OAM message.
  • AFI channel type The type value used by AFI in MPLS-TP OAM.
  • FIG. 1 is a schematic diagram of a format of a flag connecting a failure message according to an embodiment of the present invention. As shown in Figure l ib,
  • Flags Defines the AFI signal transmission period and the signal generation/clear indication.
  • Base value Base value. For example, 100 to 159, 60 consecutive ID values, you can specify the base address is 100, offset is 0, 1, ... 59, this way marks these consecutive ID values.
  • Offset Bit map According to the value of each bit is 0/1, combined with the base address, to achieve an indication of a specific connection. For example, there are 60 PWs, which are indicated by the network connection planning and configuration, in the AGG and MASG with 60 connection identifiers of 100 to 159.
  • the type value of flags in the AFI message can be 111
  • the Base value is 100
  • the offset 2 is set to 1 to indicate the information.
  • the two connection invalidation messages 110, 111 are cleared, the value of flag in the flag is 000, Base value is 100, offset 10, 11 is set to 1 to indicate the information.
  • an embodiment of the present invention provides a convergence device, where the convergence device includes: a first connectivity detection module 1201, a second connectivity detection module 1202, and a failure notification module 1203;
  • the first connectivity detecting module 1201 is configured to perform connectivity detection with the access device in the first connected access segment, where
  • the second connectivity detecting module 1202 is configured to perform connectivity detection on the second connection with the convergence gateway device.
  • the failure notification module 1203 is configured to: when any one of the first connections fails, transmit the connection identifier of the failed first connection to the convergence gateway device by using the second connection, so that the convergence gateway device performs corresponding fault processing;
  • the failure notification module is further configured to transmit a connection failure message to the access device through the first connection when the second connection fails, so that the access device performs corresponding fault processing.
  • the failure notification module 1203 includes:
  • the obtaining unit 1203a is configured to: when the convergence device detects that the first connection is invalid, the convergence device queries the locally saved first connection and the second connection according to the failed connection identifier of the first connection, and obtains a corresponding Two connections
  • the encapsulating unit 1203b is configured to encapsulate, by the convergence device, the connection identifier as a connection failure message;
  • the connection failure message sending unit 1203c is configured to send, by the convergence device, the connection failure message to the convergence gateway device by using the acquired second connection.
  • the obtaining unit 1203a is further configured to: when the convergence device detects that the second connection is invalid, query a corresponding relationship between the locally saved first connection and the second connection according to the connection identifier of the failed second connection, to obtain the first connection;
  • connection failure message sending unit 1203c is further configured to send the connection failure message to the corresponding access device by using the acquired first connection.
  • the convergence device stores the correspondence between the access segment connection and the convergence segment connection.
  • the convergence device also stores the correspondence between the abstract ID value and the actual connection identifier value.
  • the convergence device further includes:
  • the label distribution protocol connection establishing module 1204 is configured to establish a label distribution protocol connection with the access device and the convergence gateway device, and negotiate with the access device to perform connectivity detection on the single-segment pseudowire, and negotiate with the convergence gateway device. Connectivity detection.
  • an embodiment of the present invention provides a system for implementing connectivity detection.
  • the access device AN, the convergence device AGG and the convergence gateway device MASG provided by the foregoing embodiment the access device is an access segment between the convergence device, and the convergence device is a convergence segment between the convergence gateway devices.
  • the communication network further includes a first connection and a second connection, where the first connection and the second connection are jointly routed in the convergence segment, where each of the first connections corresponds to one access device, and the first connection Starting from the access device, traversing the convergence device, and terminating at the convergence gateway device, the second connection starts from the convergence device, ends in the convergence gateway device, and the access segment and the second connection in the first connection Run the connectivity test separately.
  • the convergence device and the system provided in this embodiment are the same as those in the method embodiment, and are not described here.
  • the system provided in this embodiment, by operating the OAM CC in the access segment connection and the second connection of the first connection respectively, and transmitting the connection failure message on the second connection to notify the MASG when the first connection fails, so that the MASG
  • the corresponding fault is processed, and the fault detected by the MASG, such as an AC (Attachment Circuit) fault, is notified to the AGG through the first connection. Since the number of the second connection is generally much smaller than the first connection, a large amount will be OAM
  • the CC packet is restricted to the access segment, which relieves the OAM CC packet processing pressure faced by the MASG and implements the E2E OAM connectivity detection, which improves communication efficiency and performance.
  • a person skilled in the art may understand that all or part of the steps of implementing the above embodiments may be completed by hardware, or may be instructed by a program to execute related hardware, and the program may be stored in a computer readable storage medium.
  • the storage medium mentioned may be a read only memory, a magnetic disk or an optical disk or the like.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
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  • Cardiology (AREA)
  • General Health & Medical Sciences (AREA)
  • Environmental & Geological Engineering (AREA)
  • Data Exchanges In Wide-Area Networks (AREA)

Abstract

L'invention porte sur un procédé, un dispositif d'agrégation et un système pour mettre en œuvre un contrôle de continuité, concernant le domaine de la MPLS. Le système comprend : un réseau de communication comprenant un dispositif d'accès, un dispositif d'agrégation et un dispositif passerelle d'agrégation, une section d'accès existant entre le dispositif d'accès et le dispositif d'agrégation, une section d'agrégation existant entre le dispositif d'agrégation et le dispositif passerelle d'agrégation ; le réseau de communication comprend également une première connexion et une seconde connexion. Le procédé consiste à : exécuter respectivement un contrôle de continuité sur la section d'accès de la première connexion et sur la seconde connexion ; lorsqu'une connexion quelconque dans la première connexion a échoué, envoyer l'identificateur de connexion de la première connexion ayant échoué au dispositif passerelle d'agrégation, de manière à ce que le dispositif passerelle d'agrégation exécute un traitement de dérangement correspondant ; et lorsque la seconde connexion a échoué, envoyer un message d'échec de connexion au dispositif d'accès par la première connexion, de manière à ce que le dispositif d'accès exécute un traitement de dérangement correspondant.
PCT/CN2011/076922 2011-07-06 2011-07-06 Procédé, dispositif d'agrégation et système pour mettre en œuvre un contrôle de continuité WO2012106872A1 (fr)

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PCT/CN2011/076922 WO2012106872A1 (fr) 2011-07-06 2011-07-06 Procédé, dispositif d'agrégation et système pour mettre en œuvre un contrôle de continuité

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CN104426691B (zh) * 2013-08-26 2018-02-13 华为技术有限公司 故障处理方法、汇聚网关和无线侧网关
JP6538173B2 (ja) * 2014-12-29 2019-07-03 テレコム・イタリア・エッセ・ピー・アー モバイル通信システムの性能監視
CN110162437B (zh) * 2019-05-15 2023-10-27 杭州迪普科技股份有限公司 一种框式设备内部连通性检测方法及系统
CN112653587B (zh) * 2019-10-12 2022-10-21 北京奇艺世纪科技有限公司 一种网络连通状态检测方法及装置
CN112187565B (zh) * 2020-09-10 2023-05-30 江苏慧业文人信息科技有限公司 一种网络线路质量智能检测的方法
CN113891373B (zh) * 2021-10-11 2024-03-12 中盈优创资讯科技有限公司 一种基站质量劣化自愈方法及装置

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1964249A (zh) * 2006-10-20 2007-05-16 华为技术有限公司 一种实现点到多点网络链路状态穿通的方法及其设备
US20090154478A1 (en) * 2007-12-13 2009-06-18 Alcatel Lucent Scalable Ethernet OAM Connectivity Check in an Access Network
CN101719843A (zh) * 2009-12-18 2010-06-02 烽火通信科技股份有限公司 Ptn中lsp线性保护倒换方法
CN102013990A (zh) * 2009-09-08 2011-04-13 中兴通讯股份有限公司 一种多段伪线故障的端到端通告方法及系统

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20030231615A1 (en) * 2002-06-12 2003-12-18 Adc Telecommunications Israel Ltd. Virtual Connections for voice over digital subscriber lines

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1964249A (zh) * 2006-10-20 2007-05-16 华为技术有限公司 一种实现点到多点网络链路状态穿通的方法及其设备
US20090154478A1 (en) * 2007-12-13 2009-06-18 Alcatel Lucent Scalable Ethernet OAM Connectivity Check in an Access Network
CN102013990A (zh) * 2009-09-08 2011-04-13 中兴通讯股份有限公司 一种多段伪线故障的端到端通告方法及系统
CN101719843A (zh) * 2009-12-18 2010-06-02 烽火通信科技股份有限公司 Ptn中lsp线性保护倒换方法

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