CN116170369A

CN116170369A - Multicast service processing method, device and storage medium

Info

Publication number: CN116170369A
Application number: CN202111414500.6A
Authority: CN
Inventors: 马汝胜
Original assignee: ZTE Corp
Current assignee: ZTE Corp
Priority date: 2021-11-25
Filing date: 2021-11-25
Publication date: 2023-05-26

Abstract

The invention provides a multicast service processing method, equipment and a storage medium, wherein the method comprises the following steps: the SDN controller determines a first forwarding routing table and a second forwarding routing table for transmitting multicast service according to the multicast head node and the multicast tail node of the bit index explicit replication network; the SDN controller sends the first forwarding routing table and the second forwarding routing table to the multicast head node so that the multicast head node can store the first forwarding routing table and the second forwarding routing table, and switch between the first forwarding path and the second forwarding path based on the BFD session created by the first forwarding routing table. The embodiment of the invention can shorten the recovery time of the multicast service flow when the current transmission path fails compared with the traditional mode of waiting for re-planning after failure.

Description

Multicast service processing method, device and storage medium

Technical Field

Embodiments of the present invention relate to, but are not limited to, the field of communications technologies, and in particular, to a method, an apparatus, and a storage medium for processing a multicast service.

Background

Bit index explicit replication (Bit Index Explicit Replication, BIER), a novel multicast technique. BIER, unlike conventional independent multicast routing protocols (Protocol Independent Multicast, PIM) and the like, provides a stateless multicast forwarding mechanism. In the BIER network, a multicast end node (BIER Egress) of multicast service transmission is determined by a multicast head node (BIER Ingress) of the BIER network, an intermediate node of multicast service transmission does not need to maintain state information of any multicast service of any client, and the intermediate node forwards the multicast service only according to a local bit index forwarding table (Bit Index Routing Forwarding Table, BFIT). But the recovery time of the multicast service is longer when the current transmission path of the multicast service fails.

Disclosure of Invention

The following is a summary of the subject matter described in detail herein. This summary is not intended to limit the scope of the claims.

The embodiment of the invention provides a multicast service processing method, a device and a storage medium, which can shorten the recovery time of the multicast service when the current transmission path fails in a BIER network.

In a first aspect, an embodiment of the present invention provides a multicast service processing method, which is applied to an SDN controller, where the SDN controller is configured to manage a bit index explicit replication network, and the method includes:

determining a first forwarding route table and a second forwarding route table for transmitting multicast service according to the multicast head node and the multicast tail node of the bit index explicit replication network, wherein the first forwarding route table corresponds to a first forwarding path, the second forwarding route table corresponds to a second forwarding path, and the first forwarding path and the second forwarding path are different;

and sending the first forwarding routing table and the second forwarding routing table to the multicast head node so that the multicast head node switches from the first forwarding path to the second forwarding path for multicast service transmission when the first forwarding path fails.

In a second aspect, an embodiment of the present invention provides a multicast service processing method, which is applied to a multicast head node of a bit index explicit replication network, where the method includes:

receiving and storing a first forwarding routing table and a second forwarding routing table sent by an SDN controller;

taking a first forwarding path corresponding to the first forwarding routing table as a forwarding path for transmitting multicast service;

creating a bidirectional forwarding detection session based on the first forwarding routing table;

and switching the first forwarding path into a second forwarding path corresponding to the second forwarding routing table according to the fault data of the first forwarding path detected by the bidirectional forwarding detection session in real time.

In a third aspect, an embodiment of the present invention further provides an electronic device, including: a memory, a processor and a computer program stored on the memory and executable on the processor, the processor implementing the multicast service processing method according to any one of the first aspects and/or implementing the multicast service processing method according to any one of the second aspects when the computer program is executed.

In a fourth aspect, an embodiment of the present invention further provides a computer readable storage medium, storing computer executable instructions, where the computer executable instructions are configured to implement the multicast service processing method according to any one of the first aspects and/or implement the multicast service processing method according to any one of the second aspects.

The embodiment of the invention comprises the following steps: and planning a first forwarding routing table and a second forwarding routing table for multicast service transmission by using the SDN controller to the multicast head node and the multicast tail end node of the managed BIER network, and sending the first forwarding routing table and the second forwarding routing table to the multicast head node, wherein when the multicast head node transmits the multicast service, the multicast head node can switch from the first forwarding path to the second forwarding path when the first forwarding path fails. Because the second forwarding path is planned in advance, after the fault, the fast switching of the multicast head node can be realized, and compared with the traditional mode of waiting for re-planning after the fault, the embodiment of the invention can shorten the recovery time of the multicast service when the current transmission path is in fault.

Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.

Drawings

The accompanying drawings are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate and do not limit the invention.

Fig. 1 is a flow chart of a multicast service processing method applied to an SDN controller in an embodiment of the present invention;

FIG. 2 is a system topology of a BIER network in accordance with an embodiment of the present invention;

FIG. 3 is a schematic diagram of a medium path switch of a BIER network in accordance with an embodiment of the present invention;

fig. 4 is a flow chart of a multicast service processing method applied to a multicast head node of a BIER network in an embodiment of the present invention.

Detailed Description

The present invention will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present invention more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.

It should be noted that although functional block division is performed in a device diagram and a logic sequence is shown in a flowchart, in some cases, the steps shown or described may be performed in a different order than the block division in the device, or in the flowchart. The terms first, second and the like in the description and in the claims and in the above-described figures, are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order.

Note that, bit index explicit replication (Bit Index Explicit Replication, BIER) is a new multicast technique. BIER, unlike conventional independent multicast routing protocols (Protocol Independent Multicast, PIM) and the like, provides a stateless multicast forwarding mechanism. In the BIER network, a multicast end node (BIER Egress) of multicast service transmission is determined by a multicast head node (BIER Ingress) of the BIER network, an intermediate node of multicast service transmission does not need to maintain state information of any multicast service of any client, and the intermediate node forwards the multicast service only according to a local bit index forwarding table (Bit Index Routing Forwarding Table, BFIT). But the recovery time of the multicast service is longer when the current transmission path of the multicast service fails. Based on this, the embodiment of the invention provides a multicast service processing method, a device and a storage medium, which can shorten the recovery time of a multicast service flow when the current transmission path fails in a BIER network.

Note that SDN is Software Define Network, where text is defined as a software defined network.

Referring to a flowchart shown in fig. 1, the method for processing multicast service provided by the embodiment of the present invention is applied to an SDN controller, where the SDN controller is configured to manage a bit index explicit replication network, and the method includes:

step S100, a first forwarding route table and a second forwarding route table for transmitting multicast service are determined according to a multicast head node and a multicast end node of the bit index explicit replication network, wherein the first forwarding route table corresponds to a first forwarding path, the second forwarding route table corresponds to a second forwarding path, and the first forwarding path and the second forwarding path are different.

It should be noted that, the multicast head node is an ingress routing node for accessing multicast service, and in some embodiments, the multicast receiving node is a Bit forwarding ingress router (Bit-Forward Ingress Router, BFIR).

It should be noted that, the multicast end node is an egress routing node that forwards the multicast service out of the BIER network, and in some embodiments, the multicast end node is a Bit forwarding egress router (Bit-Forward Egress Router, BFER). The number of multicast end nodes may be provided with one or more. As with the embodiment shown with reference to fig. 2, for multicast service a, two multicast end nodes are provided, R3, R6 respectively.

The first forwarding path and the second forwarding path are forwarding paths which are respectively obtained by planning to satisfy transmission of multicast service from different dimensions. For example, if the multicast service flow a is video service and requires priority for efficiency, the first forwarding path is set to be the shortest forwarding path, and the second forwarding path is planned to be the forwarding path with the shortest delay and the low packet loss rate.

Step 200, the first forwarding routing table and the second forwarding routing table are sent to the multicast head node, so that when the first forwarding path fails, the multicast head node switches from the first forwarding path to the second forwarding path for multicast service transmission.

It should be noted that, for BIER networks, each routing node in the BIER network stores a first forwarding routing table and a second forwarding routing table. In some embodiments, the first forwarding routing table and the second forwarding routing table may be sent by the SDN controller to each routing node separately, i.e. referring to the embodiment shown in fig. 2, the SDN controller may send the first forwarding routing table and the second forwarding routing table to each of R1, R2, R3, R4, R5, and R6. In other embodiments, after the SDN controller sends the set of data to the multicast head node, the set of data may be broadcast to other routing nodes by the multicast head node. It should be noted that, when the BIER network is large and is provided with a plurality of Sub Domains (SDs), when the multicast service transmits a large multicast receiver only through one of the Sub domains of the BIER network, the multicast head node, the multicast end node, the first forwarding table, and the second forwarding table are all specific to the Sub domains.

Illustratively, referring to the network topology shown in fig. 2, the BIER network includes a total of 6 routing nodes R1, R2, R3, R4, R5, R6, for multicast service a, which is accessed from the multicast head node as R1 and sent to the multicast receiver via the multicast end nodes as R3 and R6. The SDN controller may plan a first forwarding path and a second forwarding path including R1- > R3 and R1- > R6. When the first forwarding path fails, with reference to the embodiment shown in fig. 3, a switch is made from the first forwarding path (dashed partial arrow) to the second forwarding path (implementing partial arrow).

Therefore, the first forwarding routing table and the second forwarding routing table for multicast service transmission are planned for the managed multicast head node and the multicast end node of the BIER network through the SDN controller and sent to the multicast head node, and at this time, when the multicast head node transmits the multicast service, the multicast head node switches from the first forwarding path to the second forwarding path when the first forwarding path fails. Because the second forwarding path is planned in advance, after the fault, the fast switching of the multicast head node can be realized, and compared with the traditional mode of waiting for re-planning after the fault, the embodiment of the invention can shorten the recovery time of the multicast service when the current transmission path is in fault.

It should be noted that, in some embodiments, the SDN controller may plan more than two forwarding paths to adapt to multiple different requirements in the multicast service transmission process, for example, the service transmission requirements of the multicast service are sequentially the shortest time, the shortest capacity, and the low latency bandwidth; three different forwarding paths can be respectively planned according to the three transmission requirements, and the path switching strategy of the three transmission requirements is set to be the shortest priority, the capacity is inferior, and finally the low-delay bandwidth is achieved. At this time, the multicast head node performs switching of the forwarding path according to the path switching policy in combination with the failure on the forwarding path.

It should be noted that, the SDN controller may manage all routing nodes in the BIER network, so it may plan the first forwarding path and the second forwarding path more efficiently and accurately.

It should be noted that, the path switching policy of the multicast head node for switching R1 from the first forwarding path to the second forwarding path may be preset by the multicast head node, or may be dynamically issued by the SDN controller. The multicast head node performs switching of the forwarding path based on the path switching policy.

It will be appreciated that with reference to the embodiment shown in fig. 1, the method of the present invention further comprises: and issuing a path switching strategy to the multicast head node, wherein the path switching strategy comprises switching conditions for mutually switching the first forwarding path and the second forwarding path.

It should be noted that the switching condition may be a switching priority, or may be a fault alarm (such as a packet loss alarm besides a link on-off fault) serving as a decision condition during switching. Or a switching condition at the time of recovery. Taking the switching condition during recovery as an example, when the failure of the switched first forwarding path is recovered, 10min after the recovery of the first forwarding path is taken as the switching condition, so that the multicast service transmission can be ensured to be forwarded in the optimal forwarding path.

It will be appreciated that the method of the present invention further comprises: receiving a bidirectional forwarding detection failure request from a multicast head node and/or a multicast tail node; determining a fault path as a first forwarding path according to the bidirectional forwarding detection fault request; and performing bandwidth release processing on the intermediate node on the first forwarding path.

It should be noted that, when the multicast head node receives the first forwarding routing table and the second forwarding routing table, a session between the multicast head node and the corresponding multicast end node is established, and referring to the embodiment shown in fig. 2, a BFD session based on R1 and R3, and R1 and R6 of the first forwarding path is established. In some embodiments, the multicast head node may send a bidirectional forwarding detection (Bidirectional Forwarding Detection, BFD) message to the multicast end node, where the BFD message indicates a failure of the first forwarding path to R3 when not responding, and the multicast head node reports a bidirectional forwarding detection failure request. At this time, the SDN controller senses that R1- > R3 on the first forwarding path has a fault. In other embodiments, both the multicast head node and the multicast end node may send BFD messages, and the SDN controller may be notified when the multicast end node first detects a failure of the first forwarding path to R1. In other embodiments, only the multicast end node may send the BFD messages, and the SDN controller may receive only the BFD messages of the multicast end node.

It should be noted that, when the intermediate node performs bandwidth release processing, which means that the intermediate node will release bandwidth resources related to the multicast service corresponding to the first forwarding path, for example, when the multicast service B forwards the multicast service a, the multicast service B may use the bandwidth resources previously allocated to the multicast service a.

It will be appreciated that after determining the fault path, the method further comprises: and initiating a path switching request to the multicast head node, wherein the path switching request is used for switching the first forwarding path into the second forwarding path.

Note that, the switching between the first forwarding path and the second forwarding path is usually performed by the multicast head node corresponding to the multicast service, but if the multicast head node does not normally process the switching, the SDN controller may make up a switching request once. At this time, in some embodiments, the SDN controller may detect whether the multicast head node performs the reissuing of the handover request, or in other embodiments, may directly send the handover request to the multicast head node after receiving the failure.

It may be understood that in step S200, the sending the first forwarding table and the second forwarding table to the multicast head node includes: respectively filling the first forwarding routing table and the second forwarding routing table into a YANG model in a network configuration protocol to generate a protocol message; and sending the protocol message to the multicast head node.

It should be noted that, a YANG model is defined in the network configuration protocol (Netconf), YANG is a new modeling language, which can model configuration parameters, and at this time, message encapsulation of different configuration parameters can be achieved only by filling relevant information of the first forwarding routing table and the second forwarding routing table into a framework defined by the YANG model.

It should be noted that, by directly issuing the first forwarding routing table and the second forwarding routing table by the SDN controller, the situation that the contents of the routing tables generated by each node in the BIER network are inconsistent can be avoided.

It is understood that the first forwarding path and the second forwarding path are one of a shortest forwarding path, a maximum bandwidth forwarding path and a minimum delay forwarding path.

Illustratively, the first forwarding path is the shortest forwarding path, and the second forwarding path may be the maximum bandwidth forwarding path or the minimum delay forwarding path; for another example, the first forwarding path may be the maximum bandwidth forwarding path and the second forwarding path may be the shortest forwarding path. It should be noted that the first forwarding path and the second forwarding path may be other types of forwarding paths, and may specifically be determined according to a transmission requirement of the multicast service.

It should be noted that, the transmission time on the shortest forwarding path is shortest (or the forwarding frequency is the smallest), the largest bandwidth forwarding path is bandwidth-first, and the smallest delay forwarding path indicates that the delay time under the guaranteed minimum transmission bandwidth is shortest.

It can be understood that referring to the flowchart shown in fig. 4, the present invention also proposes a multicast service processing method, applied to a multicast head node of a bit index explicit replication network, the method comprising:

step S300, receiving and storing the first forwarding routing table and the second forwarding routing table sent by the SDN controller.

It should be noted that, the first forwarding routing table corresponds to the first forwarding path, and the second forwarding routing table corresponds to the second forwarding path differently; the first forwarding path and the second forwarding path are different. Illustratively, referring to the embodiment shown in fig. 3, the first forwarding routing table records the forwarding order of the intermediate node corresponding to the dashed arrow. The second forwarding routing table records the forwarding order of the intermediate node corresponding to the implementing arrow.

Step 400, the first forwarding path corresponding to the first forwarding routing table is used as a forwarding path for transmitting the multicast service.

It should be noted that, for the multicast head node, a path switching policy is set, and when both the first forwarding path and the second forwarding path have no fault, the first forwarding path is selected as the current forwarding path by default. For multicast traffic, the first forwarding path represents the path planned according to the highest priority requirement of the multicast traffic transmission, and if the time requirement is highest for multicast traffic, the first forwarding path is the shortest forwarding path planned.

It should be noted that, the path switching policy may be set by default for the multicast head node, for example, when receiving multiple routing tables from the same multicast head node to the same multicast end node for the multicast head node, the path switching policy defaults to select a current forwarding path according to the filling order in the protocol packet, and takes a failure on the current forwarding path as a switching condition. In other embodiments, the path switch policy may also be issued by the SDN controller.

Step S500, a bidirectional forwarding detection session is created based on the first forwarding routing table.

It should be noted that, the bidirectional forwarding detection session, i.e. the BFD session, is configured to detect whether the first forwarding path transmitted by the multicast head node based on the first forwarding routing table is faulty. It should be noted that, when there are more than two forwarding paths for the multicast service, a session may be established based on multiple forwarding paths, for example, the multicast service a plans the first forwarding path S1, the second forwarding path S2, and the third forwarding path S3, where the switching order of S1, S2, and S3 is S1, S2, and S3 in sequence, and then BFD sessions based on S1 and S2 may be created respectively, so that the link and the service transmission state of S1 and S2 may be detected, and the detected data detected by S1 and S2 may be used as the switching condition of the forwarding paths.

And step 600, switching the first forwarding path to a second forwarding path corresponding to the second forwarding routing table according to the real-time detection of the fault data of the first forwarding path by the bidirectional forwarding detection session.

It should be noted that, after the first forwarding path is switched to the second forwarding path, the multicast service is transmitted from the second forwarding path.

Therefore, the first forwarding routing table and the second forwarding routing table for multicast service transmission are planned for the managed multicast head node and the multicast end node of the BIER network through the SDN controller and sent to the multicast head node, and at this time, when the multicast head node transmits the multicast service, the multicast head node switches from the first forwarding path to the second forwarding path when the first forwarding path fails. Because the second forwarding path is planned in advance, after the fault, the fast switching of the multicast head node can be realized, and compared with the traditional mode of waiting for re-planning after the fault, the embodiment of the invention can shorten the recovery time of the multicast service flow when the current transmission path is in fault.

It should be noted that, referring to the embodiment shown in fig. 2, for the first routing table and the second routing table obtained by planning, the first routing table and the second routing table are also forwarded to all routing nodes in the sub-domain of multicast service transmission or BIER, that is, R1 to R6 each store two routing tables, and when in actual transmission, the forwarding address of the next hop is determined by searching the corresponding first forwarding routing table or the second forwarding routing table according to the multicast service.

It is understood that the method further comprises: and setting the detection parameters of the bidirectional forwarding detection session as a service interruption threshold value.

It should be noted that, since the multicast head node performs the switching, the shorter the period of the detection parameter, the faster the multicast head node switches, and the shorter the time of the interruption of the multicast service. The service interruption threshold value represents the time of tolerating service interruption, and in some embodiments, the service interruption threshold value is set to be 50ms, so that the duration of service interruption can meet most application scenes, and the customer experience is not affected.

At this time, based on the embodiment shown in fig. 2, referring to the flow diagrams of fig. 1 and 4, the multicast service a is sent to the R1 routing node by the multicast source, the R1 routing node determines that the current forwarding path is the first forwarding path from the first forwarding routing table and the second forwarding routing table planned by the SDN controller, and at this time, the multicast service a is forwarded to the R3 routing node and the R6 routing node by the R2 routing node and is transmitted to the corresponding multicast receiver. When a BFD session created based on the R1 routing node, the R3 routing node and the R6 routing node detects a fault, namely, the R1 routing node sends a detection message to the R3 routing node without a response, and the R1 routing node does not respond to the detection message of the R6 routing node, the first forwarding path is not available, and taking the detection message sent to the R3 routing node by the R1 routing node as an example, at the moment, the multicast head node R1 or the multicast tail node R3 senses the fault, and the multicast head node R1 switches to the second forwarding path according to a path switching strategy issued by the SDN controller. Meanwhile, the R1 routing node and/or the R3 routing node can send the fault information to the SDN controller, and the SDN controller informs the R2 routing node to release bandwidth so as to process other multicast services. Meanwhile, if the SDN controller detects that the R1 routing node is not switched (for example, the R3 routing node continuously sends fault information to the SDN controller), the SDN controller actively issues a switching instruction to the R1 routing node, and at the moment, the R1 routing node performs path switching according to a path switching strategy. At this time, the multicast service flows from the second forwarding path, i.e., R1- > R5- > R3, R6 shown in fig. 3.

It will be appreciated by those skilled in the art that the topologies shown in fig. 2 and 3 are not limiting of the embodiments of the invention, and may include more or fewer components than shown, or may combine certain components, or may be arranged in different components.

It can be understood that the present invention also proposes an electronic device comprising: the system comprises a memory, a processor and a computer program stored on the memory and capable of running on the processor, wherein the processor realizes a multicast service processing method applied to an SDN controller and/or a multicast service processing method applied to a multicast head node of a BIER network when executing the computer program.

The memory, as a non-transitory computer readable storage medium, may be used to store non-transitory software programs as well as non-transitory computer executable programs. In addition, the memory may include high-speed random access memory, and may also include non-transitory memory, such as at least one magnetic disk storage device, flash memory device, or other non-transitory solid state storage device. In some embodiments, the memory optionally includes memory remotely located relative to the processor, the remote memory being connectable to the processor through a network. Examples of such networks include, but are not limited to, the internet, intranets, local area networks, mobile communication networks, and combinations thereof.

It should be noted that, the electronic device in this embodiment may be applied as an SDN controller or a multicast head node in the network topology in the embodiment shown in fig. 2, and the electronic device in this embodiment and the method in the embodiment shown in fig. 1 or the method shown in fig. 4 have the same inventive concept, so these embodiments have the same implementation principles and technical effects, and will not be described in detail herein.

It should be noted that, in some embodiments, some electronic devices may be used as an SDN controller and may also be used as a routing node in a BIER network, so that the multicast service processing method of the SDN controller and the multicast service processing method applied to a multicast head node of the BIER network may be stored.

It should be noted that, for each routing node in the BIER network, it is determined as a multicast head node or an intermediate node or a multicast end node according to the location and the physical topology. Therefore, when each routing node in the BIER network is used as a multicast head node, the multicast service processing method applied to the multicast head node of the BIER network can be realized.

Note that, the non-transitory software program and instructions required to implement the information processing method of the above embodiment are stored in the memory, and when executed by the processor, the information processing method of the above embodiment is executed, for example, the method steps S100 to S200 in fig. 1, and the method steps corresponding to the steps S300 to S600 and the sub steps thereof in fig. 4 described above are executed.

It can be understood that the present invention further provides a computer readable storage medium storing computer executable instructions for implementing a multicast service processing method applied to an SDN controller and/or a multicast service processing method applied to a multicast head node of a BIER network.

Those of ordinary skill in the art will appreciate that all or some of the steps, systems, and methods disclosed above may be implemented as software, firmware, hardware, and suitable combinations thereof. Some or all of the physical components may be implemented as software executed by a processor, such as a central processing unit, digital signal processor, or microprocessor, or as hardware, or as an integrated circuit, such as an application specific integrated circuit. Such software may be distributed on computer readable media, which may include computer storage media (or non-transitory media) and communication media (or transitory media). The term computer storage media includes both volatile and nonvolatile, removable and non-removable media implemented in any method or technology for storage of information such as computer readable instructions, data structures, program modules or other data, as known to those skilled in the art. Computer storage media includes, but is not limited to, RAM, ROM, EEPROM, flash memory or other memory technology, CD-ROM, digital Versatile Disks (DVD) or other optical disk storage, magnetic cassettes, magnetic tape, magnetic disk storage or other magnetic storage devices, or any other medium which can be used to store the desired information and which can be accessed by a computer. Furthermore, as is well known to those of ordinary skill in the art, communication media typically embodies computer readable instructions, data structures, program modules or other data in a modulated data signal such as a carrier wave or other transport mechanism and includes any information delivery media.

Illustratively, the computer readable storage medium stores the operating instructions corresponding to the method steps S100-S200 in fig. 1, and the steps S300-S600 and sub-steps in fig. 4. When a device, such as a communication device, loads the computer readable storage medium, a multicast service processing method, such as applied to an SDN controller, or a multicast service processing method, such as applied to a multicast head node of a BIER network, may be implemented.

While the preferred embodiment of the present invention has been described in detail, the present invention is not limited to the above embodiment, and various equivalent modifications and substitutions can be made by those skilled in the art without departing from the spirit of the present invention, and these equivalent modifications and substitutions are intended to be included in the scope of the present invention as defined in the appended claims.

Claims

1. A multicast service processing method applied to an SDN controller, the SDN controller being configured to manage a bit indexed explicit replication network, the method comprising:

2. The multicast service processing method according to claim 1, wherein the multicast service processing method further comprises:

and issuing a path switching strategy to the multicast head node, wherein the path switching strategy comprises switching conditions for mutually switching the first forwarding path and the second forwarding path.

3. The multicast service processing method according to claim 1, wherein the multicast service processing method further comprises:

receiving a bidirectional forwarding detection failure request from the multicast head node and/or the multicast tail node;

determining a fault path as the first forwarding path according to the bidirectional forwarding detection fault request;

and performing bandwidth release processing on the intermediate node on the first forwarding path.

4. The multicast service processing method according to claim 3, wherein after determining the failure path, the multicast service processing method further comprises:

and initiating a path switching request to the multicast head node, wherein the path switching request is used for switching the first forwarding path into a second forwarding path.

5. The method for multicast service processing according to claim 1, wherein,

the sending the first forwarding routing table and the second forwarding routing table to the multicast head node includes:

respectively filling the first forwarding routing table and the second forwarding routing table into a YANG model in a network configuration protocol to generate a protocol message;

and sending the protocol message to the multicast head node.

6. The method for multicast service processing according to claim 1, wherein,

the first forwarding path comprises any one of a shortest forwarding path, a maximum bandwidth forwarding path and a minimum delay forwarding path;

the second forwarding path includes any one of a shortest forwarding path, a maximum bandwidth forwarding path, and a minimum delay forwarding path.

7. A multicast service processing method applied to a multicast head node of a bit index explicit replication network, the method comprising:

8. The multicast service processing method according to claim 7, wherein the multicast service processing method further comprises:

and setting the detection parameters of the bidirectional forwarding detection session as a service interruption threshold value.

9. An electronic device, comprising: memory, processor and computer program stored on the memory and executable on the processor, characterized in that the processor implements the multicast service processing method according to any of claims 1 to 6 and/or implements the multicast service processing method according to any of claims 7 to 8 when executing the computer program.

10. A computer readable storage medium storing computer executable instructions for implementing at least a multicast service processing method according to any one of claims 1 to 6 and/or implementing a multicast service processing method according to any one of claims 7 to 8.