WO2018040809A1 - P2mp组播隧道保护的方法、装置、系统及设备 - Google Patents

P2mp组播隧道保护的方法、装置、系统及设备 Download PDF

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Publication number
WO2018040809A1
WO2018040809A1 PCT/CN2017/094664 CN2017094664W WO2018040809A1 WO 2018040809 A1 WO2018040809 A1 WO 2018040809A1 CN 2017094664 W CN2017094664 W CN 2017094664W WO 2018040809 A1 WO2018040809 A1 WO 2018040809A1
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Prior art keywords
node
tunnel
bud
service
bud node
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PCT/CN2017/094664
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English (en)
French (fr)
Inventor
翟宇
何益波
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中兴通讯股份有限公司
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    • 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
    • H04L45/22—Alternate routing
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L47/00—Traffic control in data switching networks
    • H04L47/70—Admission control; Resource allocation
    • H04L47/72—Admission control; Resource allocation using reservation actions during connection setup
    • H04L47/726—Reserving resources in multiple paths to be used simultaneously
    • H04L47/728—Reserving resources in multiple paths to be used simultaneously for backup paths
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L47/00—Traffic control in data switching networks
    • H04L47/70—Admission control; Resource allocation
    • H04L47/80—Actions related to the user profile or the type of traffic
    • H04L47/806—Broadcast or multicast traffic
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L47/00—Traffic control in data switching networks
    • H04L47/70—Admission control; Resource allocation
    • H04L47/82—Miscellaneous aspects
    • H04L47/825—Involving tunnels, e.g. MPLS

Definitions

  • the present invention relates to the field of communications, and in particular, to a point-to-multipoint (P2MP) multicast tunnel protection method, apparatus, system, and device.
  • P2MP point-to-multipoint
  • a P2MP tunnel is characterized in that any multicast group occupies only one traffic in the same physical span of the network, and fully considers the bandwidth utilization efficiency of the Packet Optical Transport Network (PTN) network, and the multimedia broadcast multicast service.
  • the Multicast Broadcast Multicast Service Gateway (MBGW) pushes each multicast group service to the access layer PTN device of each directly connected base station through the P2MP multicast tree.
  • the access layer PTN device serves as the Internet group.
  • the Internet Group Management Protocol (IGMP) querier interacts with the attached base station through IGMP to determine whether to push multicast traffic and specifically push traffic of multicast groups.
  • IGMP Internet Group Management Protocol
  • a P2MP tunnel is a one-way one-way multi-homing tunnel. It uses a one-way 1+1 protection mode. The reason is: First, a P2MP tunnel is a one-way tunnel. Secondly, the selection of the sink node is simple, and the automatic protection switching (APS) protocol interaction is not used. Finally, the selection and switching performance is high.
  • the protection method of 1+1 is to establish two paths between the root node and the pure leaf node.
  • the P2MP tunnel protection of the prior art is similar to the point-to-point 1+1 (P2P 1+1) unidirectional protection.
  • the main idea of the method is that the primary root and the alternate root are dual-transmitted. The receiving end selects the revenue, as shown in Figure 1. Under normal circumstances, the selected working stream is discarded. Stream. In the case of a working link failure, the protected stream is selected.
  • the drawback of this method is that since the primary root and the alternate root are used, there are two flows of the working and protection links. Bandwidth is wasted when the device is operating normally and without failure.
  • the embodiments of the present invention provide a method, a device, a system, and a device for protecting a P2MP multicast tunnel, which are required to establish a large number of protection paths and increase the cost of establishing and maintaining a P2MP tunnel of a carrier. And the problem of wasting bandwidth.
  • a method for P2MP multicast tunnel protection including: detecting whether a first tunnel between a first bud node and a first root node in a multicast tree is faulty; When the fault occurs, the first landing service is pushed to the first bud node on the second tunnel, where the second tunnel is a tunnel that performs service forwarding through the second bud node in the multicast tree.
  • the first landing service is pushed to the first bud node on the second tunnel, including: pushing the first landing service to the second bud node by using a second root node; The landing service is forwarded to the first bud node by the second bud node.
  • the method further includes: pushing, by the second root node, the second landing service to the Said second bud node.
  • the first bud node is configured with a P2MP tunnel protection group, where the P2MP tunnel protection group includes: a working path of the landing service of the first bud node and a protection path for protecting the working path; and
  • the second bud node is configured with a P2MP tunnel protection group, where the P2MP tunnel protection group includes: a working path of the landing service of the second bud node and a protection path for protecting the working path.
  • the first bud node and the second bud node are configured with a tunnel that carries the first landing service and a tunnel that carries forwarding services.
  • the method further includes: when detecting that the first tunnel returns to normal, the first bud node The landing service is switched back to the first tunnel by the second tunnel.
  • an apparatus for P2MP multicast tunnel protection including: a detecting module, configured to detect whether a first tunnel between a first bud node and a first root node in a multicast tree occurs a first push module, configured to: when the fault is detected, push the first landing service to the first bud node on the second tunnel, where the second tunnel is the first through the multicast tree A tunnel in which two bud nodes perform service forwarding.
  • the first pushing module is further configured to: push the first landing service to the second bud node by using a second root node; and forward the first landing service to the second bud node to The first bud node.
  • the device further includes: a second pushing module, configured to pass the second root node when forwarding the first landing service to the first bud node by using the second bud node The second landing service is pushed to the second bud node.
  • a second pushing module configured to pass the second root node when forwarding the first landing service to the first bud node by using the second bud node The second landing service is pushed to the second bud node.
  • a P2MP multicast tunnel protection system including: a first root node, a second root node, a first bud node, and a second bud node in a multicast tree, where Forming a first tunnel between the first bud node and the first root node; forming a second tunnel between the second root node, the second bud node, and the first bud node, where And when the first tunnel fails, the first landing service is pushed to the first bud node by using the second tunnel.
  • the second root node is configured to push the first landing service to the second bud node; and the second bud node is configured to forward the first landing service to the first A bud node.
  • an apparatus for point-to-multipoint P2MP multicast tunnel protection including: a processor, configured to detect a first node between a first bud node and a first root node in a multicast tree Whether a tunnel has failed; and when detecting a failure, selecting to push the first landing service to the first bud node on the second tunnel; the communication device is set to the first bud The node pushes the first landing service.
  • the processor is further configured to select to push the first landing service to the second bud node by using the second root node; and select to forward the first landing service to the location by using the second bud node Said the first bud node.
  • a storage medium is also provided.
  • the storage medium is configured to store program code for performing the steps of: detecting whether a first tunnel between the first bud node and the first root node in the multicast tree has failed; and detecting a failure, in the second tunnel Pushing the first landing service to the first bud node, where the second tunnel is a tunnel for performing service forwarding through the second bud node in the multicast tree.
  • the storage medium is further configured to store program code for performing the following steps: pushing the first landing service to the second bud node by using a second root node; The second bud node is forwarded to the first bud node.
  • the storage medium is further configured to store program code for performing the following steps: passing the second landing service when the first landing service is forwarded to the first bud node by the second bud node The node pushes the second landing service to the second bud node.
  • the storage medium is further configured to store program code for performing the following steps: when it is detected that the first tunnel is restored to normal, the landing service of the first bud node is backed by the second tunnel to The first tunnel.
  • the foregoing embodiment of the present invention can solve the problem in the related art by detecting whether the first tunnel in the multicast tree is faulty and pushing the first landing service to the first bud node on the second tunnel after detecting the fault.
  • the P2MP tunnel protection needs to establish a large number of protection paths, thereby increasing the cost of establishing and maintaining the P2MP tunnel of the operator and wasting bandwidth.
  • the cost of establishing and maintaining the P2MP tunnel of the operator is reduced, and the robustness of the network is improved.
  • FIG. 1 is a schematic diagram of a P2MP networking and service configuration in the related art
  • FIG. 2 is a network architecture diagram in accordance with an embodiment of the present invention.
  • FIG. 3 is a flowchart of a method for P2MP multicast tunnel protection according to an embodiment of the present invention
  • FIG. 4 is a schematic diagram of a bud node processing landing service protected by a P2MP multicast tunnel according to an embodiment of the present invention
  • FIG. 5 is a flowchart (1) of a method for P2MP multicast tunnel protection according to an alternative embodiment of the present invention
  • FIG. 6 is a flowchart (2) of a method for P2MP multicast tunnel protection according to an alternative embodiment of the present invention.
  • FIG. 7 is a schematic diagram of P2MP multicast tunnel protection after a tunnel failure according to an embodiment of the present invention.
  • FIG. 8 is a flowchart (3) of a method for P2MP multicast tunnel protection according to an alternative embodiment of the present invention.
  • FIG. 9 is a structural block diagram of an apparatus for P2MP multicast tunnel protection according to an embodiment of the present invention.
  • FIG. 10 is a structural block diagram (1) of an apparatus for P2MP multicast tunnel protection according to an alternative embodiment of the present invention.
  • FIG. 11 is a structural block diagram (2) of an apparatus for P2MP multicast tunnel protection according to an alternative embodiment of the present invention.
  • FIG. 12 is a schematic diagram of a system for configuring P2MP tunnel protection by a pure leaf node (1)
  • FIG. 13 is a schematic diagram of a system for configuring P2MP tunnel protection for a pure leaf node (2)
  • FIG. 14 is a structural block diagram of an apparatus for P2MP multicast tunnel protection according to an embodiment of the present invention.
  • the forwarding and landing services refer to L3 multicast services, specifically:
  • the landing service refers to: the service pushed to the base station under the connection;
  • the forwarding service refers to a service that is not pushed to the downlink base station but continues to be sent to the next node.
  • the network architecture includes: a first root node 22, a second root node 24, a first bud node 26, and a second bud in a multicast tree.
  • Node 28 wherein a first tunnel is formed between the first bud node 26 and the first root node 22; a second tunnel is formed between the second root node 24, the second bud node 28, and the first bud node 26, When the first tunnel fails, the first landing service is pushed to the first bud node 26 through the second tunnel.
  • the first root node 22, the second root node 24, the first bud node 26, and the second bud node 28 may be PTN devices of the core network and the access network, but are not limited thereto.
  • FIG. 3 is a flowchart of a P2MP multicast tunnel protection method according to an embodiment of the present invention, as shown in FIG. As shown, the process includes the following steps:
  • Step S302 detecting whether a first tunnel between the first bud node and the first root node in the multicast tree fails;
  • Step S304 when detecting a fault, pushing the first landing service to the first bud node on the second tunnel, where the second tunnel is a tunnel for performing service forwarding through the second bud node in the multicast tree.
  • the type of the node can be divided into: a root node, a pure branch node, a pure leaf node, and a bud node. Since a P2MP tunnel needs to be configured on each node, the P2MP tunnel can include the following roles of the P2MP tunnel: a pure branch, a pure leaf, and a bud, wherein the root includes a primary root and a backup root; the pure branch means that the P2MP tunnel only carries the forwarding service, and does not carry the landing service; the pure leaf means that the P2MP tunnel does not carry the forwarding service.
  • the P2MP tunnel carries both the forwarding service and the landing service; the leaf node refers to the node of the P2MP tunnel configured with pure leaves or buds.
  • the above failure may refer to a link failure due to a link problem such as signal failure or signal degradation.
  • the fiber of the link is broken, the optical module is damaged, and the optical fiber and the optical module are aged.
  • the multicast service can include the landing service and the forwarding service (the specific processing method of the landing service is as shown in Figure 4), that is, the multicast service pushed to the bud node can be forwarded or directly landed, specifically: the bud node will directly land the service data. Sending to the corresponding base station, forwarding the forwarding service data to the neighboring node.
  • the forwarding service actually performs the label exchange and the landing service is tagged. Stripped.
  • step S304 can be implemented by: pushing the first landing service to the second bud node by using the second root node; and forwarding the first landing service to the first bud node by using the second bud node.
  • the P2MP multicast tunnel protection can use the existing tunnel as a protection tunnel by using the P2MP tunnel of the existing bud node in the network, so that the protection tunnel cannot be established, and the carrier is reduced. The technical effect of the cost of establishing and maintaining a P2MP tunnel.
  • the following operations may be performed: pushing the second landing service to the second root node The second bud node.
  • the root node can carry the service data of multiple bud nodes and the P2MP tunnel of the bud node carries both the forwarding service and the landing service
  • the second root node is simultaneously implemented to the first bud node and the second node.
  • the bud node pushes the first landing service or the second landing service, which reduces the number of protection tunnels established in the network and reduces the cost of establishing and maintaining the P2MP tunnel of the operator.
  • the first bud node is configured with a P2MP tunnel protection group, where the P2MP tunnel protection group includes: a working path of the landing service of the first bud node and a protection path for protecting the working path; and /
  • the second bud node is configured with a P2MP tunnel protection group, where the P2MP tunnel protection group includes: a working path of the landing service of the second bud node and a protection path for protecting the working path.
  • the first tunnel and the second tunnel are mutually protected tunnels, and the short path from the root node to the bud node can be selected as the working path, and the long path from the other root node to the bud node is the protection path.
  • the working path is the first tunnel, and the protection path is the second tunnel.
  • the protection path is the first tunnel, but is not limited thereto.
  • the first bud node and the second bud node are configured with a tunnel carrying the first landing service and a tunnel carrying the forwarding service.
  • the P2MP tunnel connected to the bud node can carry both the forwarding service and the landing service, because the bud node carries the tunnel of the landing service and the tunnel of the forwarding service.
  • the following operations may be performed: when the first tunnel is detected to be normal, the landing service of the first bud node is The second tunnel is switched back to the first tunnel.
  • the second tunnel is not required to continue to push the landing service, so the landing service of the first bud node is switched back to the first tunnel by the second tunnel, so that the first tunnel can be fully utilized.
  • the bandwidth of the two tunnels and the two tunnels can also form mutual protection, which improves the robustness of the network.
  • FIG. 5 is a flowchart (1) of a method for P2MP multicast tunnel protection according to an alternative embodiment of the present invention. As shown in FIG. 5, the process includes the following steps:
  • Step S502 the first tunnel and the second tunnel in the multicast tree are deployed, and the multicast service is respectively sent from the first tunnel or the second tunnel to the first bud node, where the first tunnel is the first bud node and the first node.
  • a tunnel formed between the nodes, and the second tunnel is a tunnel formed between the second root node, the second bud node, and the first bud node;
  • Step S504 the first tunnel with the short path is selected as the working path, and the second tunnel with the selected path is the protection path, and the P2MP protection group is deployed for the landing service on the first bud node;
  • Step S506 when detecting the working path failure, the landing service selection is received from the protection path, and the first bud node continues to forward the received forwarding service.
  • the P2MP tunnel protection only protects the landing service, and the forwarding service is not affected. Therefore, the configuration and maintenance cost can be saved for the operator.
  • FIG. 6 is a flowchart (2) of a method for P2MP multicast tunnel protection according to an alternative embodiment of the present invention. As shown in FIG. 6, the method includes the following steps:
  • Step S602 configuring a P2MP tunnel and a multicast service on the A, B, C, and D network element nodes, where the A node is the first root node 22, the B power saving is the second root node 24, and the C node is the first bud. Node 26, the D node is the second bud node 28;
  • Step S604 the P2MP tunnel protection groups 1 and 2 are respectively configured on the C and D nodes, wherein in the protection group 1, the AC is a working path, the corresponding protection path is a BDC, and in the protection group 2, the BD is a working path.
  • the corresponding protection path is ACD;
  • Step S606 when detecting a tunnel failure of the A to C node, the C node determines that the protection group 1 working path is faulty, the protection group 2 protection path is faulty, and switches to the protection path of the protection group 1 according to the APS state machine, and the C node receives the B.
  • the multicast service pushed by the node when detecting a tunnel failure of the A to C node, the C node determines that the protection group 1 working path is faulty, the protection group 2 protection path is faulty, and switches to the protection path of the protection group 1 according to the APS state machine, and the C node receives the B.
  • the multicast service pushed by the node.
  • the bud node in step S602, can carry the forwarded service and can carry the service of the landing. Therefore, in the multicast tree with the A node as the root node, the landing service can be pushed from the A node to the C.
  • the node may also forward the forwarding service to the D node through the C node, and the D node receives the forwarding service and falls to the destination.
  • the principle of the multicast tree with the node B as the root node is the same as that of the multicast node with the node A as the root node.
  • the forwarded service needs to be label-switched, and the service needs to be implemented.
  • the behavior of the protection group does not affect the forwarding business.
  • any forwarding service can be configured in the working and protection path to make full use of the bandwidth.
  • the improved P2MP tunnel protection group also runs a linear 1+1 APS protocol state machine, which can issue blocking, forced switching, manual switching, support return, and working path. After waiting for the WTR time in the fault, the tunnel is stabilized and then switched back.
  • the tunnel fault of the A to C node in step S606 is a fault of the tunnel between the first root node 22 and the first bud node as shown in FIG. 7.
  • the tunnel from B to D fails, the working path of the protection group 2 is faulty and needs to be switched to the protection path, so that the landing service of the D node is protected.
  • the dual role of this kind of bud node makes the networking more reasonable and more secure.
  • FIG. 8 is a flowchart (3) of a method for P2MP multicast tunnel protection according to an alternative embodiment of the present invention. As shown in FIG. 8, the method includes the steps shown in FIG. Between the step S604 and the step S606, the method further includes: in step S802, after the D node receives the switching instruction issued by the user, the landing service of the D node is switched to the protection path of the protection group 2.
  • the landing service of the D node is switched to the protection path of the protection group 2, after the service is forwarded by the D node, the service flow with the path BDC is not affected by the switching instruction, and is pushed to the C node.
  • the method according to the above embodiment can be implemented by means of software plus a necessary general hardware platform, and of course, by hardware, but in many cases, the former is A better implementation.
  • the technical solution of the present invention which is essential or contributes to the prior art, may be embodied in the form of a software product stored in a storage medium (such as ROM/RAM, disk,
  • the optical disc includes a number of instructions for causing a terminal device (which may be a cell phone, a computer, a server, or a network device, etc.) to perform the methods described in various embodiments of the present invention.
  • a device for P2MP multicast tunnel protection is further provided, and the device is used for
  • the device is used for
  • the term "module” may implement a combination of software and/or hardware of a predetermined function.
  • the apparatus described in the following embodiments is preferably implemented in software, hardware, or a combination of software and hardware, is also possible and contemplated.
  • FIG. 9 is a structural block diagram of an apparatus for P2MP multicast tunnel protection according to an embodiment of the present invention.
  • the apparatus includes: a detecting module 92 configured to detect a first bud node and a first root node in a multicast tree. Whether the first tunnel is faulty; the first push module 94 is configured to push the first landing service to the first bud node on the second tunnel when the fault is detected, wherein the second tunnel is through the multicast A tunnel in which the second bud node in the tree forwards traffic.
  • the first pushing module 94 is further configured to push the first landing service to the second bud node through the second root node; and forward the first landing service to the first bud through the second bud node node.
  • FIG. 10 is a structural block diagram (1) of an apparatus for P2MP multicast tunnel protection according to an alternative embodiment of the present invention.
  • the apparatus includes all of the components shown in FIG.
  • the second push module 1002 is further configured to push the second landing service to the second bud node through the second root node when forwarding the first landing service to the first bud node through the second bud node.
  • each of the above modules may be implemented by software or hardware.
  • the foregoing may be implemented by, but not limited to, the foregoing modules are all located in the same processor; or, the above modules are in any combination.
  • the forms are located in different processors.
  • a P2MP multicast tunnel protection device is also provided, which is used to implement the foregoing embodiments and preferred embodiments, and has not been described again.
  • the term "module” may implement a combination of software and/or hardware of a predetermined function.
  • the apparatus described in the following embodiments is preferably implemented in software, hardware, or a combination of software and hardware, is also possible and contemplated.
  • the apparatus includes: a configuration module 1102, configured to configure a P2MP tunnel and a service, where P2MP
  • the tunnel type includes: a root, a pure branch, a pure leaf, a bud, and a P2MP tunnel protection group is configured on the selected leaf node;
  • the state monitoring module 1104 is configured to monitor, indicate the working state of the node, and the working state of the P2MP tunnel and An alarm is generated when the status of the node or the tunnel is abnormal.
  • the tunnel includes a working path and a protection path.
  • the status monitoring is performed by the P2MP Operational Administration and Maintenance (OAM).
  • the switching control module 1106 is configured to According to the link state and the protection link alarm information fed back by the link state monitoring unit, the APS state machine of the node is updated, and the switching of the control node is performed.
  • OAM Operational Administration and Maintenance
  • each of the above modules may be implemented by software or hardware.
  • the foregoing may be implemented by, but not limited to, the foregoing modules are all located in the same processor; or, the above modules are in any combination.
  • the forms are located in different processors.
  • a P2MP multicast tunnel protection system is further provided, where the system includes: a first root node 22, a second root node 24, a first bud node 26, and a second bud node 28 in the multicast tree.
  • a first tunnel is formed between the first bud node 26 and the first root node 22;
  • a second tunnel is formed between the second root node 24, the second bud node 28 and the first bud node 26, wherein
  • the first tunnel fails, the first landing service is pushed to the first bud node through the second tunnel.
  • the second root node 24 is configured to push the first landing service to the second bud node 28; the second bud node 28 is configured to forward the first landing service to the first bud. Node 26.
  • the embodiment of the present invention can be compatible with a system in which the node is a pure leaf node, such as the system shown in FIG. 12 and FIG. 13, but is not limited thereto.
  • FIG. 12 is a schematic diagram (1) of a system for configuring P2MP tunnel protection by a pure leaf node.
  • the system includes: an A node 1202, a B node 1204, C node 1206, D node 1208 and E node 1210, where A node 1202 and B node 1204 are root nodes, and C node 1206, D node 1208, and E node 1210 are pure leaf nodes.
  • Each multicast service is unselected to the C node 1106, the D node 1208, and the E node 1210 by a multicast tree rooted at the A node 1202.
  • the C node 1206, the D node 1208, and the E node 1210 function as IGMP queriers, and the connected base station selects whether to join the multicast group as a member of the IGMP, and the C node 1206, the D node 1208, and the E node 1210 decide whether to put the service.
  • AC, AD, and AE are working paths, P2MP tunnels are configured, and landing services are configured on the pure child leaf nodes.
  • the BC, BD, and BE paths are P2MP protection tunnels (protection paths), and P2MP tunnel protection is configured on C nodes 1206, D nodes 1208, and E nodes 1210.
  • P2MP tunnel protection is configured on C nodes 1206, D nodes 1208, and E nodes 1210.
  • Two multicast trees rooted by the A node 1202 and the B node 1204 are formed, and the service is pushed to the C node 1206, the D node 1208, and the E node 1210 through two multicast trees without selection.
  • C node 1206, D node 1208, and E node 1210 select to receive or protect the path from the working path. Normally, the service that is received by the working path is selected, and the service pushed by the protection path is discarded.
  • FIG. 13 is a schematic diagram (2) of a pure leaf node configuration P2MP tunnel protection system. As shown in FIG. 13, the system includes: an A node 1202, a B node 1204, a C node 1206, and a D node. 1208 and E node 1210, wherein A node 1202 and B node 1204 are root nodes, and C node 1206, D node 1208, and E node 1210 are pure leaf nodes.
  • the C node 1206 node senses the failure and chooses to receive the pushed service on the protection path.
  • FIG. 14 is a structural block diagram of a device for P2MP multicast tunnel protection according to an embodiment of the present invention.
  • the protection device 140 includes: a processor 1402 configured to detect a first bud node in the multicast tree and the first Whether the first tunnel between the root nodes fails; and when detecting the failure, selecting to push the first landing service to the first bud node on the second tunnel; and the communication device 1404 is configured to push the first bud node A landing business.
  • the processor 1402 is further configured to select to push the first landing service to the second bud node through the second root node; and select to forward the first landing service to the first through the second bud node.
  • Bud node is further configured to select to push the first landing service to the second bud node through the second root node; and select to forward the first landing service to the first through the second bud node.
  • Embodiments of the present invention also provide a storage medium.
  • the foregoing storage medium may be configured to store program code for performing the following steps: S1, detecting whether the first tunnel between the first bud node and the first root node in the multicast tree is A fault occurs; S2, when a fault is detected, the first landing service is pushed to the first bud node on the second tunnel, where the second tunnel is a tunnel for forwarding traffic through the second bud node in the multicast tree.
  • the storage medium is further configured to store program code for performing the following steps: pushing the first landing service to the second bud node through the second root node; forwarding the first landing service to the second bud node A bud node.
  • the storage medium is further configured to store program code for performing the following steps: pushing the second landing service through the second root node when forwarding the first landing service to the first bud node through the second bud node Go to the second bud node.
  • the storage medium is further configured to store program code for performing the following steps: when it is detected that the first tunnel is back to normal, the landing service of the first bud node is switched back to the first tunnel by the second tunnel.
  • the foregoing storage medium may include, but is not limited to, a USB flash drive, a Read-Only Memory (ROM), and a Random Access Memory (RAM).
  • ROM Read-Only Memory
  • RAM Random Access Memory
  • modules or steps of the present invention described above can be implemented by a general-purpose computing device that can be centralized on a single computing device or distributed across a network of multiple computing devices. Alternatively, they may be implemented by program code executable by the computing device so that they may be stored in the storage device by the computing device Execution, and in some cases, the steps shown or described may be performed in an order different than that herein, or they may be separately fabricated into individual integrated circuit modules, or a plurality of The integrated circuit module is implemented. Thus, the invention is not limited to any specific combination of hardware and software.

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Abstract

本发明提供了一种点对多点P2MP组播隧道保护的方法、装置、系统及设备，其中该方法包括：检测组播树中第一芽节点与第一根节点之间的第一隧道是否发生故障；在检测到发生故障时，在第二隧道上向第一芽节点推送第一落地业务，其中，第二隧道为通过组播树中第二芽节点进行业务转发的隧道，本发明技术方案解决了相关技术中由于P2MP隧道保护需要建立大量的保护路径，从而增加运营商P2MP隧道建立和维护的成本且浪费带宽的问题，进而达到了降低运营商P2MP隧道的建立和维护的成本，提高了网络健壮性的效果。

Description

P2MP组播隧道保护的方法、装置、系统及设备 技术领域
本发明涉及通信领域，具体而言，涉及一种点对多点(Point to Multiple，简称为P2MP)组播隧道保护的方法、装置、系统及设备。
背景技术
P2MP隧道的特性是任一组播组在网络内同一物理跨段只占用一份流量，充分考虑了分组传送网(Packet Optical Transport Network，简称为PTN)网络的带宽利用效率，多媒体广播多播业务网关(Multimedia Broadcast Multicast Service Gateway，简称为MBGW)通过P2MP组播树把各个组播组业务不加选择地全部推送到各个直连基站的接入层PTN设备，由接入层PTN设备作为Internet组管理协议(Internet Group Management Protocol，简称IGMP)查询器，与下挂基站通过IGMP交互来决定是否推送组播流量且具体推送哪些组播组的流量。
目前，常用的P2MP隧道保护组有1:1和1+1保护两种类型，其中1:1是双向的，配置保护组的两端都进行保护倒换，而1+1保护只需要在故障影响的一侧进行倒换。P2MP隧道是单向的单源多宿的隧道，常使用单向1+1保护方式，原因是：首先，P2MP隧道是单向的隧道。其次，在宿节点选收，实现简单，也不用自动保护倒换(Automatic Protection Switch，简称为APS)协议交互。最后，选收切换性能高。1+1的保护方法为：在根节点和纯叶子节点之间建立两条路径，当其中一条路径发生故障时，在纯叶子节点选择另一条路径推送的组播业务。因此，对于每条P2MP隧道都需要建立其对应的保护隧道。该保护方法需要建立大量的保护路径，所以为运营商带来了大量的建立和维护成本。
另外，现有技术的P2MP隧道保护和点对点1+1(Point to Point 1+1，简称为P2P 1+1)单向保护类似，该方法的主要思路是主用根和备用根双发，在接收端选收，如图1所示，正常情况下，选收工作的流，丢弃保护 的流。工作链路故障的情况下，选收保护的流。这种方法的缺陷是：由于采用的是主用根和备用根双发，这样工作和保护链路有两份流存在。在设备运行正常没有故障时，非常浪费带宽。
针对上述问题，相关技术中尚未提出有效的解决方案。
发明内容
本发明实施例提供了一种P2MP组播隧道保护的方法、装置、系统及设备，以至少解决相关技术中由于P2MP隧道保护需要建立大量的保护路径，增加了运营商P2MP隧道建立和维护的成本且浪费带宽的问题。
根据本发明的一个实施例，提供了一种P2MP组播隧道保护的方法，包括：检测组播树中第一芽节点与第一根节点之间的第一隧道是否发生故障；在检测到发生故障时，在第二隧道上向所述第一芽节点推送第一落地业务，其中，所述第二隧道为通过所述组播树中第二芽节点进行业务转发的隧道。
可选地，在第二隧道上向所述第一芽节点推送第一落地业务，包括：将所述第一落地业务通过第二根节点推送到所述第二芽节点；将所述第一落地业务通过所述第二芽节点转发到所述第一芽节点。
可选地，在将所述第一落地业务通过所述第二芽节点转发到所述第一芽节点时，所述方法还包括：通过所述第二根节点将第二落地业务推送到所述第二芽节点。
可选地，所述第一芽节点配置有P2MP隧道保护组，其中，所述P2MP隧道保护组包括：所述第一芽节点的落地业务的工作路径和对工作路径进行保护的保护路径；和/或所述第二芽节点配置有P2MP隧道保护组，其中，所述P2MP隧道保护组包括：所述第二芽节点的落地业务的工作路径和对工作路径进行保护的保护路径。
可选地，所述第一芽节点和所述第二芽节点配置有承载所述第一落地业务的隧道和承载转发业务的隧道。
可选地，在所述第二隧道上向所述第一芽节点推送第一落地业务之后，所述方法还包括：当检测到所述第一隧道恢复正常时，将所述第一芽节点的落地业务由所述第二隧道回切到所述第一隧道。
根据本发明的另一个实施例，提供了一种P2MP组播隧道保护的装置，包括：检测模块，设置为检测组播树中第一芽节点与第一根节点之间的第一隧道是否发生故障；第一推送模块，设置为在检测到发生故障时，在第二隧道上向所述第一芽节点推送第一落地业务，其中，所述第二隧道为通过所述组播树中第二芽节点进行业务转发的隧道。
可选地，所述第一推送模块还设置为将所述第一落地业务通过第二根节点推送到所述第二芽节点；将所述第一落地业务通过所述第二芽节点转发到所述第一芽节点。
可选地，所述装置还包括：第二推送模块，设置为在将所述第一落地业务通过所述第二芽节点转发到所述第一芽节点时，通过所述第二根节点将第二落地业务推送到所述第二芽节点。
根据本发明的另一实施例，提供了一种P2MP组播隧道保护的系统，包括：组播树中的第一根节点、第二根节点、第一芽节点和第二芽节点，其中，在所述第一芽节点和所述第一根节点之间形成第一隧道；在所述第二根节点、所述第二芽节点和所述第一芽节点之间形成第二隧道，其中，在所述第一隧道发生故障时，通过所述第二隧道向所述第一芽节点推送第一落地业务。
可选地，所述第二根节点，设置为将所述第一落地业务推送到所述第二芽节点；所述第二芽节点，设置为将所述第一落地业务转发到所述第一芽节点。
根据本发明的另一实施例，提供了一种点对多点P2MP组播隧道保护的设备，包括：处理器，设置为检测组播树中第一芽节点与第一根节点之间的第一隧道是否发生故障；以及在检测到发生故障时，选择在第二隧道上向所述第一芽节点推送第一落地业务；通信装置，设置为向所述第一芽 节点推送所述第一落地业务。
可选地，所述处理器还设置为选择通过第二根节点将所述第一落地业务推送到第二芽节点；以及选择通过所述第二芽节点将所述第一落地业务转发到所述第一芽节点。
根据本发明的另一个实施例，还提供了一种存储介质。该存储介质设置为存储用于执行以下步骤的程序代码：检测组播树中第一芽节点与第一根节点之间的第一隧道是否发生故障；在检测到发生故障时，在第二隧道上向所述第一芽节点推送第一落地业务，其中，所述第二隧道为通过所述组播树中第二芽节点进行业务转发的隧道。
可选地，存储介质还设置为存储用于执行以下步骤的程序代码：将所述第一落地业务通过第二根节点推送到所述第二芽节点；将所述第一落地业务通过所述第二芽节点转发到所述第一芽节点。
可选地，存储介质还设置为存储用于执行以下步骤的程序代码：在将所述第一落地业务通过所述第二芽节点转发到所述第一芽节点时，通过所述第二根节点将第二落地业务推送到所述第二芽节点。
可选地，存储介质还设置为存储用于执行以下步骤的程序代码：当检测到所述第一隧道恢复正常时，将所述第一芽节点的落地业务由所述第二隧道回切到所述第一隧道。
通过本发明的上述实施例，由于检测组播树中第一隧道是否发生故障并在检测到发生故障后在第二隧道上向第一芽节点推送第一落地业务，因此，可以解决相关技术中由于P2MP隧道保护需要建立大量的保护路径，从而增加运营商P2MP隧道建立和维护的成本且浪费带宽的技术问题，达到降低运营商P2MP隧道的建立和维护的成本，提高了网络健壮性的效果。
附图说明
此处所说明的附图用来提供对本发明的进一步理解，构成本申请的一部分，本发明的示意性实施例及其说明用于解释本发明，并不构成对本发 明的不当限定。在附图中：
图1是相关技术中的P2MP组网及业务配置示意图；
图2是根据本发明实施例的网络架构图；
图3是根据本发明实施例的P2MP组播隧道保护的方法的流程图；
图4是根据本发明实施例的P2MP组播隧道保护的芽节点处理落地业务的示意图；
图5是根据本发明可选实施例的P2MP组播隧道保护的方法的流程图(一)；
图6是根据本发明可选实施例的P2MP组播隧道保护的方法的流程图(二)；
图7是根据本发明实施例的隧道故障后P2MP组播隧道保护的示意图；
图8是根据本发明可选实施例的P2MP组播隧道保护的方法的流程图(三)；
图9是根据本发明实施例的P2MP组播隧道保护的装置的结构框图；
图10是根据本发明可选实施例的P2MP组播隧道保护的装置的结构框图(一)；
图11是根据本发明可选实施例的P2MP组播隧道保护的装置的结构框图(二)；
图12是纯叶子节点配置P2MP隧道保护的系统示意图(一)；
图13是纯叶子节点配置P2MP隧道保护的系统示意图(二)；
图14是根据本发明实施例的P2MP组播隧道保护的设备的结构框图。
具体实施方式
下文中将参考附图并结合实施例来详细说明本发明。需要说明的是，在不冲突的情况下，本申请中的实施例及实施例中的特征可以相互组合。
需要说明的是，本发明的说明书和权利要求书及上述附图中的术语 “第一”、“第二”等是用于区别类似的对象，而不必用于描述特定的顺序或先后次序。
为了便于理解本发明的实施例，以下对于本发明的实施例中涉及的技术术语解释如下：
转发和落地的业务是指L3组播业务，具体为：
落地业务是指：推送给下挂的基站的业务；
转发业务是指：不会被推送到下挂的基站而是继续发送给下一个节点的业务。
实施例1
图2是根据本发明实施例的网络架构图，如图2所示，该网络架构包括：组播树中的第一根节点22、第二根节点24、第一芽节点26和第二芽节点28，其中，在第一芽节26点和第一根节点22之间形成第一隧道；在第二根节点24、第二芽节点28和第一芽节点26之间形成第二隧道，其中，在第一隧道发生故障时，通过第二隧道向第一芽节点26推送第一落地业务。
可选地，第一根节点22、第二根节点24、第一芽节点26和第二芽节点28可以为核心网和接入网的PTN设备，但是并不限于此。
在本实施例中提供了一种运行于图2所示的网络架构的P2MP组播隧道保护的方法，图3是根据本发明实施例的P2MP组播隧道保护的方法的流程图，如图3所示，该流程包括如下步骤：
步骤S302，检测组播树中第一芽节点与第一根节点之间的第一隧道是否发生故障；
步骤S304，在检测到发生故障时，在第二隧道上向第一芽节点推送第一落地业务，其中，第二隧道为通过组播树中第二芽节点进行业务转发的隧道。
在本实施例中，节点的类型可以分为：根节点、纯分支节点、纯叶子节点和芽节点，由于每个节点上需要配置P2MP隧道，因此P2MP的隧道可以包括以下P2MP隧道的角色：根、纯分支，纯叶子和芽，其中，上述根包括主根和备根；该纯分支是指该P2MP的隧道只承载转发业务，没有承载落地业务；该纯叶子是指该P2MP隧道没有承载转发业务，只承载落地业务；该芽是指该P2MP隧道既承载转发业务，又承载落地业务；该叶子节点是指配置了纯叶子或芽的P2MP隧道的节点。
可选地，上述故障可以是指因为信号失效或信号劣化等链路问题导致链路的故障。具体可以包括：链路的光纤断裂、光模块损坏、光纤和光模块老化。组播业务可以包括落地业务和转发业务(落地业务的具体处理方式如图4所示)，即推送到芽节点的组播业务可以进行转发或者直接落地，具体为：芽节点将落地业务数据直接发送到相应的基站上，将转发业务数据转发给相邻节点，此外，由于芽节点包括入标签和出标签，因此，上述转发业务实际上是进行了标签的交换而落地业务是进行了标签的剥离。
通过上述步骤，由于检测组播树中第一隧道是否发生故障并在检测到发生故障后在第二隧道上向第一芽节点推送第一落地业务，因此，可以解决相关技术中由于P2MP隧道保护需要建立大量的保护路径，从而增加运营商P2MP隧道建立和维护的成本且浪费带宽的技术问题，达到降低运营商P2MP隧道的建立和维护的成本，提高了网络健壮性的效果。
在一个可选的实施例中，步骤S304可以通过以下方式实现：将第一落地业务通过第二根节点推送到第二芽节点；将第一落地业务通过第二芽节点转发到第一芽节点。在本实施例中，通过利用网络中已有的芽节点的P2MP隧道承载转发业务的特性，使得P2MP组播隧道保护可以把现有的隧道作为保护隧道，无需额外建立保护隧道，达到降低运营商P2MP隧道的建立和维护的成本的技术效果。
在一个可选的实施例中，在将第一落地业务通过第二芽节点转发到第一芽节点时，可以执行以下操作：通过第二根节点将第二落地业务推送到 第二芽节点。在本实施例中，由于根节点可以携带多个芽节点的业务数据且由于芽节点的P2MP隧道既承载转发业务又承载落地业务，因此实现了第二根节点同时向第一芽节点和第二芽节点推送第一落地业务或第二落地业务，继而减少了网络中建立保护隧道的数量，降低了运营商P2MP隧道的建立和维护的成本。
在一个可选的实施例中，第一芽节点配置有P2MP隧道保护组，其中，P2MP隧道保护组包括：第一芽节点的落地业务的工作路径和对工作路径进行保护的保护路径；和/或第二芽节点配置有P2MP隧道保护组，其中，P2MP隧道保护组包括：第二芽节点的落地业务的工作路径和对工作路径进行保护的保护路径。在本实施例中，由于第一隧道和第二隧道相互为对方的保护隧道，且可以选择根节点到芽节点的短路径为工作路径，另一个根节点到该芽节点的长路径为保护路径，因此，当第一芽节点配置P2MP隧道保护组后，工作路径为第一隧道，保护路径为第二隧道，同理，当第二芽节点配置P2MP隧道保护组后，工作路径为第二隧道，保护路径为第一隧道，但是并不限于此。
在一个可选的实施例中，该第一芽节点和该第二芽节点配置有承载上述第一落地业务的隧道和承载转发业务的隧道。在本实施例中，由于该芽节点承载有落地业务的隧道和转发业务的隧道，因此，与该芽节点连接的P2MP隧道既可以承载转发业务又可以承载落地业务。
在一个可选的实施例中，在第二隧道上向第一芽节点推送第一落地业务之后，还可以执行：当检测到第一隧道恢复正常时，将第一芽节点的落地业务由第二隧道回切到第一隧道。在本实施例中，当检测到第一隧道恢复正常后，无需采用第二隧道继续推送落地业务，因此将第一芽节点的落地业务由第二隧道回切到第一隧道，这样可以充分利用两条隧道的带宽且两条隧道也可以形成相互保护，提高了网络健壮性。
在一个可选的实施例中，图5是根据本发明可选实施例的P2MP组播隧道保护的方法的流程图(一)，如图5所示，该流程包括如下步骤：
步骤S502，部署组播树中的第一隧道和第二隧道，组播业务分别从第一隧道或第二隧道推送到第一芽节点，其中，第一隧道为第一芽节点和第一根节点之间形成的隧道，第二隧道为第二根节点、第二芽节点和第一芽节点之间形成的隧道；
步骤S504，选定路径短的第一隧道为工作路径，选定路径长的第二隧道为保护路径并在该第一芽节点上针对落地业务部署P2MP保护组；
步骤S506，当检测到该工作路径故障时，落地业务选择从该保护路径收，该第一芽节点继续转发接收到的转发业务。
通过上述步骤，P2MP隧道保护只保护落地业务，转发业务不受影响，因此可以为运营商节省配置和维护成本。
在一个可选的实施例中，图6是根据本发明可选实施例的P2MP组播隧道保护的方法的流程图(二)，如图6所示，该方法包括以下步骤：
步骤S602，在A，B，C，D网元节点上配置P2MP隧道和组播业务，其中，A节点为第一根节点22，B节电为第二根节点24，C节点为第一芽节点26，D节点为第二芽节点28；
步骤S604，在C和D节点上分别配置P2MP隧道保护组1和2，其中，在保护组1中，AC是工作路径，对应的保护路径为BDC，在保护组2中，BD是工作路径，对应的保护路径为ACD；
步骤S606，当检测到A到C节点的隧道故障时，C节点确定保护组1工作路径故障，保护组2保护路径故障，并根据APS状态机倒换到保护组1的保护路径，C节点接收B节点推送下来的组播业务。
在本实施例中，步骤S602中，由于芽节点即可以承载转发的业务又可以承载落地的业务，因此，在以A节点为根节点的组播树中，可以从A节点推送落地业务到C节点，也可以通过C节点将转发业务转发到D节点，D节点接收该转发业务并落地。以B节点为根节点的组播树与以A节点为根节点的组播树原理相同，此处不再赘述。
可选地，针对芽节点，转发的业务需要进行标签交换，落地的业务需 要进行标签剥离，保护组的行为不影响转发的业务。这样在工作和保护路径可以配置任意转发业务，充分利用带宽，改进的P2MP隧道保护组也运行线性的1+1APS协议状态机，可以下发闭锁、强制倒换、人工倒换，支持返回式，工作路径故障时等待WTR时间后即隧道稳定后再回切。
可选地，步骤S606中A到C节点的隧道故障为如图7所示的第一根节点22与第一芽节点之间的隧道的故障。此外，如果B到D的隧道故障，保护组2工作路径故障，需要倒换到保护路径，从而D节点的落地业务受到保护。这种芽节点的双重角色，使得组网更加合理，保护更加充分。
在一个可选的实施例中，图8是根据本发明可选实施例的P2MP组播隧道保护的方法的流程图(三)，如图8所示，该方法包括图6所示的步骤以外，在步骤S604和步骤S606之间还包括：步骤S802，在D节点接收到用户下发的倒换指令后，D节点的落地业务倒换到保护组2的保护路径。
在本实施例中，尽管D节点的落地业务倒换到保护组2的保护路径，但是经过D节点转发业务，路径为BDC的业务流不受到此倒换指令的影响，继续推送到C节点。
通过以上的实施方式的描述，本领域的技术人员可以清楚地了解到根据上述实施例的方法可借助软件加必需的通用硬件平台的方式来实现，当然也可以通过硬件，但很多情况下前者是更佳的实施方式。基于这样的理解，本发明的技术方案本质上或者说对现有技术做出贡献的部分可以以软件产品的形式体现出来，该计算机软件产品存储在一个存储介质(如ROM/RAM、磁碟、光盘)中，包括若干指令用以使得一台终端设备(可以是手机，计算机，服务器，或者网络设备等)执行本发明各个实施例所述的方法。
实施例2
在本实施例中还提供了一种P2MP组播隧道保护的装置，该装置用于 实现上述实施例及优选实施方式，已经进行过说明的不再赘述。如以下所使用的，术语“模块”可以实现预定功能的软件和/或硬件的组合。尽管以下实施例所描述的装置较佳地以软件来实现，但是硬件，或者软件和硬件的组合的实现也是可能并被构想的。
图9是根据本发明实施例的P2MP组播隧道保护的装置的结构框图，如图9所示，该装置包括：检测模块92，设置为检测组播树中第一芽节点与第一根节点之间的第一隧道是否发生故障；第一推送模块94，设置为在检测到发生故障时，在第二隧道上向第一芽节点推送第一落地业务，其中，第二隧道为通过组播树中第二芽节点进行业务转发的隧道。
在一个可选的实施例中，该第一推送模块94还设置为将第一落地业务通过第二根节点推送到第二芽节点；将第一落地业务通过第二芽节点转发到第一芽节点。
在一个可选的实施例中，图10是根据本发明可选实施例的P2MP组播隧道保护的装置的结构框图(一)，如图10所示，该装置除包括图9所示的所有模块外，还包括第二推送模块1002，设置为在将第一落地业务通过第二芽节点转发到第一芽节点时，通过第二根节点将第二落地业务推送到第二芽节点。
需要说明的是，上述各个模块是可以通过软件或硬件来实现的，对于后者，可以通过以下方式实现，但不限于此：上述模块均位于同一处理器中；或者，上述各个模块以任意组合的形式分别位于不同的处理器中。
实施例3
在本实施例中还提供了一种P2MP组播隧道保护的装置，该装置用于实现上述实施例及优选实施方式，已经进行过说明的不再赘述。如以下所使用的，术语“模块”可以实现预定功能的软件和/或硬件的组合。尽管以下实施例所描述的装置较佳地以软件来实现，但是硬件，或者软件和硬件的组合的实现也是可能并被构想的。
图11是根据本发明可选实施例的P2MP组播隧道保护的装置的结构框图(二)，如图11所示，该装置包括：配置模块1102，设置为配置P2MP隧道和业务，其中P2MP的隧道类型包括：根、纯分支，纯叶子，芽，且在选定的叶子节点上配置P2MP隧道保护组；状态监测模块1104，设置为监测、指示节点的工作状态、P2MP隧道的工作状态且在节点或隧道状态出现异常时产生告警，其中，所述隧道包括工作路径和保护路径，所述状态监测由P2MP操作管理维护(Operational Administration and Maintenance，简称为OAM)负责；倒换控制模块1106，设置为根据链路状态监测单元反馈的链路状态和保护链路告警信息，更新节点的APS状态机，控制节点的倒换。
需要说明的是，上述各个模块是可以通过软件或硬件来实现的，对于后者，可以通过以下方式实现，但不限于此：上述模块均位于同一处理器中；或者，上述各个模块以任意组合的形式分别位于不同的处理器中。
实施例4
在本实施例中还提供了一种P2MP组播隧道保护的系统，该系统包括：组播树中的第一根节点22、第二根节点24、第一芽节点26和第二芽节点28，其中，在第一芽节26点和第一根节点22之间形成第一隧道；在第二根节点24、第二芽节点28和第一芽节点26之间形成第二隧道，其中，在第一隧道发生故障时，通过第二隧道向第一芽节点推送第一落地业务。
在一个可选的实施例中，该第二根节点24，用于将第一落地业务推送到第二芽节点28；该第二芽节点28，用于将第一落地业务转发到第一芽节点26。
本发明实施例可以兼容节点是纯叶子节点的系统，例如如图12和图13所示的系统，但是并不限于此。
在一个可选的实施例中，图12是纯叶子节点配置P2MP隧道保护的系统示意图(一)，如图12所示，该系统包括：A节点1202，B节点1204， C节点1206，D节点1208和E节点1210，其中，A节点1202和B节点1204是根节点，C节点1206、D节点1208和E节点1210是纯叶子节点。
通过以A节点1202为根的组播树把各个组播业务不加选择的推送到C节点1106、D节点1208和E节点1210。C节点1206、D节点1208和E节点1210作为IGMP的查询器，下挂的基站作为IGMP的成员选择是否加入到该组播组，C节点1206、D节点1208和E节点1210再决定是否把业务继续推送到各基站，其中，AC，AD，AE为工作路径，配置P2MP隧道，在纯子叶子节点上配置落地业务。
BC，BD，BE路径为P2MP保护隧道(保护路径)，在C节点1206、D节点1208和E节点1210上配置P2MP隧道保护。形成了以A节点1202和B节点1204为根的两颗组播树，业务通过两颗组播树不加选择的推送到C节点1206、D节点1208和E节点1210。C节点1206、D节点1208和E节点1210选择从工作路径收或者保护路径收。正常情况下，选取接收工作路径推送的业务，丢弃保护路径推送的业务。
在一个可选的实施例中，图13是纯叶子节点配置P2MP隧道保护的系统示意图(二)，如图13所示，该系统包括：A节点1202，B节点1204，C节点1206，D节点1208和E节点1210，其中，A节点1202和B节点1204是根节点，C节点1206、D节点1208和E节点1210是纯叶子节点。
当A节点1202到达C节点1206的P2MP隧道发生故障时，C节点1206节点感知到故障，选择在保护路径上接收推送的业务。
实施例5
图14是根据本发明实施例的P2MP组播隧道保护的设备的结构框图，如图14所示，该保护设备140包括：处理器1402，设置为检测组播树中第一芽节点与第一根节点之间的第一隧道是否发生故障；以及在检测到发生故障时，选择在第二隧道上向第一芽节点推送第一落地业务；通信装置1404，设置为向第一芽节点推送第一落地业务。
在一个可选的实施例中，该处理器1402还设置为选择通过第二根节点将第一落地业务推送到第二芽节点；以及选择通过第二芽节点将第一落地业务转发到第一芽节点.
实施例6
本发明的实施例还提供了一种存储介质。可选地，在本实施例中，上述存储介质可以被设置为存储用于执行以下步骤的程序代码：S1，检测组播树中第一芽节点与第一根节点之间的第一隧道是否发生故障；S2，在检测到发生故障时，在第二隧道上向第一芽节点推送第一落地业务，其中，第二隧道为通过组播树中第二芽节点进行业务转发的隧道。
可选地，存储介质还被设置为存储用于执行以下步骤的程序代码：将第一落地业务通过第二根节点推送到第二芽节点；将第一落地业务通过第二芽节点转发到第一芽节点。
可选地，存储介质还被设置为存储用于执行以下步骤的程序代码：在将第一落地业务通过第二芽节点转发到第一芽节点时，通过第二根节点将第二落地业务推送到第二芽节点。
可选地，存储介质还被设置为存储用于执行以下步骤的程序代码：当检测到第一隧道恢复正常时，将第一芽节点的落地业务由第二隧道回切到第一隧道。
可选地，在本实施例中，上述存储介质可以包括但不限于：U盘、只读存储器(Read-Only Memory，简称为ROM)、随机存取存储器(Random Access Memory，简称为RAM)、移动硬盘、磁碟或者光盘等各种可以存储程序代码的介质。
显然，本领域的技术人员应该明白，上述的本发明的各模块或各步骤可以用通用的计算装置来实现，它们可以集中在单个的计算装置上，或者分布在多个计算装置所组成的网络上，可选地，它们可以用计算装置可执行的程序代码来实现，从而，可以将它们存储在存储装置中由计算装置来 执行，并且在某些情况下，可以以不同于此处的顺序执行所示出或描述的步骤，或者将它们分别制作成各个集成电路模块，或者将它们中的多个模块或步骤制作成单个集成电路模块来实现。这样，本发明不限制于任何特定的硬件和软件结合。
以上所述仅为本发明的优选实施例而已，并不用于限制本发明，对于本领域的技术人员来说，本发明可以有各种更改和变化。凡在本发明的精神和原则之内，所作的任何修改、等同替换、改进等，均应包含在本发明的保护范围之内。

Claims (14)

  1. 一种点对多点P2MP组播隧道保护的方法，包括：
    检测组播树中第一芽节点与第一根节点之间的第一隧道是否发生故障；
    在检测到发生故障时，在第二隧道上向所述第一芽节点推送第一落地业务，其中，所述第二隧道为通过所述组播树中第二芽节点进行业务转发的隧道。
  2. 根据权利要求1所述的方法，其中，在第二隧道上向所述第一芽节点推送第一落地业务，包括：
    将所述第一落地业务通过第二根节点推送到所述第二芽节点；
    将所述第一落地业务通过所述第二芽节点转发到所述第一芽节点。
  3. 根据权利要求2所述的方法，其中，在将所述第一落地业务通过所述第二芽节点转发到所述第一芽节点时，所述方法还包括：通过所述第二根节点将第二落地业务推送到所述第二芽节点。
  4. 根据权利要求1所述的方法，其中，
    所述第一芽节点配置有P2MP隧道保护组，其中，所述P2MP隧道保护组包括：所述第一芽节点的落地业务的工作路径和对工作路径进行保护的保护路径；和/或
    所述第二芽节点配置有P2MP隧道保护组，其中，所述P2MP隧道保护组包括：所述第二芽节点的落地业务的工作路径和对工作路径进行保护的保护路径。
  5. 根据权利要求1至4中任一项所述的方法，其中，所述第一芽节点和所述第二芽节点配置有承载所述第一落地业务的隧道和承载转发业务的隧道。
  6. 根据权利要求1或2所述的方法，其中，在所述第二隧道上 向所述第一芽节点推送第一落地业务之后，所述方法还包括：当检测到所述第一隧道恢复正常时，将所述第一芽节点的落地业务由所述第二隧道回切到所述第一隧道。
  7. 一种点对多点P2MP组播隧道保护的装置，包括：
    检测模块，设置为检测组播树中第一芽节点与第一根节点之间的第一隧道是否发生故障；
    第一推送模块，设置为在检测到发生故障时，在第二隧道上向所述第一芽节点推送第一落地业务，其中，所述第二隧道为通过所述组播树中第二芽节点进行业务转发的隧道。
  8. 根据权利要求7所述的装置，其中，所述第一推送模块还设置为将所述第一落地业务通过第二根节点推送到所述第二芽节点；将所述第一落地业务通过所述第二芽节点转发到所述第一芽节点。
  9. 根据权利要求8所述的装置，其中，所述装置还包括：第二推送模块，设置为在将所述第一落地业务通过所述第二芽节点转发到所述第一芽节点时，通过所述第二根节点将第二落地业务推送到所述第二芽节点。
  10. 一种点对多点P2MP组播隧道保护的系统，包括：组播树中的第一根节点、第二根节点、第一芽节点和第二芽节点，其中，
    在所述第一芽节点和所述第一根节点之间形成第一隧道；在所述第二根节点、所述第二芽节点和所述第一芽节点之间形成第二隧道，其中，在所述第一隧道发生故障时，通过所述第二隧道向所述第一芽节点推送第一落地业务。
  11. 根据权利要求10所述的系统，其中，所述第二根节点，设置为将所述第一落地业务推送到所述第二芽节点；所述第二芽节点，设置为将所述第一落地业务转发到所述第一芽节点。
  12. 一种点对多点P2MP组播隧道保护的设备，包括：
    处理器，设置为检测组播树中第一芽节点与第一根节点之间的第一隧道是否发生故障；以及在检测到发生故障时，选择在第二隧道上向所述第一芽节点推送第一落地业务；
    通信装置，设置为向所述第一芽节点推送所述第一落地业务。
  13. 根据权利要求12所述的设备，其中，所述处理器还设置为选择通过第二根节点将所述第一落地业务推送到第二芽节点；以及选择通过所述第二芽节点将所述第一落地业务转发到所述第一芽节点。
  14. 一种计算机可读存储介质，存储有计算机程序，当所述计算机程序被运行时，执行权利要求1至6中任一项所述的方法。
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