CN112737826A - Multicast service fault processing method, C-BSR, electronic device and medium - Google Patents
Multicast service fault processing method, C-BSR, electronic device and medium Download PDFInfo
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- 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
- H04L41/0654—Management of faults, events, alarms or notifications using network fault recovery
- H04L41/0663—Performing the actions predefined by failover planning, e.g. switching to standby network elements
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- H—ELECTRICITY
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- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/02—Details
- H04L12/16—Arrangements for providing special services to substations
- H04L12/18—Arrangements for providing special services to substations for broadcast or conference, e.g. multicast
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- H—ELECTRICITY
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- 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
- H04L43/0817—Monitoring or testing based on specific metrics, e.g. QoS, energy consumption or environmental parameters by checking availability by checking functioning
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- H—ELECTRICITY
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- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L45/00—Routing or path finding of packets in data switching networks
- H04L45/16—Multipoint routing
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Abstract
The embodiment of the invention provides a fault processing method of multicast service, a C-BSR, electronic equipment and a storage medium. The method comprises the following steps: the candidate bootstrap router C-BSR detects whether the selected router E-BSR is abnormal; and if the E-BSR is abnormal, the C-BSR sends a BSR election message to other C-BSRs in the PIM-SM so as to elect a new E-BSR from all the C-BSRs. According to the fault processing method for the multicast service, provided by the embodiment of the invention, when the E-BSR and the RP have faults simultaneously, a new E-BSR can be selected from other C-BSRs rapidly, all equipment in a multicast network can obtain new RP information rapidly, and the multicast service can be recovered rapidly after the E-BSR and the RP have faults simultaneously.
Description
Technical Field
The embodiment of the invention relates to the technical field of communication, in particular to a multicast service fault processing method, a C-BSR, electronic equipment and a storage medium.
Background
Multicast is used as a single point-to-multipoint network transmission mode, a multicast data source only needs to send a message, and when the message reaches a network node nearest to a multicast data source receiver, the message is copied and distributed to each multicast data source receiver. The multicast network transmission technology effectively solves the problems of large bandwidth occupation and network load in the transmission process of the single-point to multi-point network.
A Protocol Independent Multicast (PIM-SM) is a Multicast Protocol Mode which is currently most widely applied, in a PIM-SM working model, information of a Multicast data source and Multicast receivers is converged at an RP through a Rendezvous Point (RP), all Multicast sources need to be registered at the RP, all receivers needing Multicast data request data by sending JOIN messages to the RP, and the RP obtains routes to the Multicast sources and the receivers while obtaining information of the RP Multicast sources or the Multicast receivers.
Fig. 1 is a schematic diagram of deployment of a PIM-SM multicast network, and as shown in fig. 1, a multicast data receiver sends a specified multicast Group G reception request to a router C through an Internet Group Management Protocol (IGMP Protocol). After receiving a multicast group G receiving request sent by a multicast receiver, the router C sends a multicast group G joining request to the RP router B hop by hop, and after receiving the multicast group G joining request sent by the router C, the router B establishes a shared Tree (RPT Tree) from the RP to the multicast receiver. The multicast data source sends a multicast data message with a multicast group G, the multicast data message is used as a first router A connected with the multicast data source, after receiving the data message of the multicast group G, a corresponding RP (router B) is found according to the multicast group G, a unicast registration message is sent to the RP (router B), after receiving the multicast registration message, the RP (router B) sends an addition message to the multicast source, a Shortest Path Tree (SPT) from the RP to the multicast source is established, the multicast data is distributed to the RP through the Shortest Path Tree, and the multicast data is distributed to multicast data receivers through a shared Tree on the RP.
As shown in fig. 1, in PIM-SM, all routers need to know which network device an RP is, and implement an action of distributing multicast data to multicast data receivers through the RP, in PIM-SM network, in order to prevent RP failure, multiple Candidate RPs (canddirect-RPs, C-RPs) are configured, and then a BootStrap Router (BootStrap Router, BSR) is responsible for collecting information of all RPs in the network in PIM-SM, and periodically sending BootStrap information (BootStrap Messages, BSM) carrying a group-RP mapping to the entire PIM-SM network. All routers obtain the RP information from the BSM information.
Only one selected self-selection Router (E-BSR) is arranged in each PIM-SM network, in order to prevent the failure of the E-BSR, a plurality of Candidate BootStrap routers (C-BSR) can be configured in the PIM-SM network, the E-BSR is selected among the C-BSR according to a BootStrap Router selection algorithm by comparing the priority and IP address information carried in self-reporting messages, and if the E-BSR cannot work normally, the C-BSR can reselect a new E-BSR.
In the deployment of the multicast PIM-SM network, RP is the core role of the whole multicast network, RP information is collected and notified to all routers in the network through an E-BSR, when the E-BSR and the RP simultaneously have faults, if other C-BSRs do not receive bootstrap messages within a 130s period, all other C-BSRs can initiate a round of election again, and one C-BSR is elected as the E-BSR. Before the new E-BSR is elected, the multicast network can not obtain the new RP information, and the multicast service in the whole network is interrupted.
Disclosure of Invention
Aiming at the defects in the prior art, the embodiment of the invention provides a multicast service fault processing method, a C-BSR, electronic equipment and a storage medium.
In a first aspect, an embodiment of the present invention provides a method for handling a fault of a multicast service, where the method is applied in a sparse mode protocol independent multicast PIM-SM, and includes:
the candidate bootstrap router C-BSR detects whether the selected router E-BSR is abnormal;
and if the E-BSR is abnormal, the C-BSR sends a BSR election message to other C-BSRs in the PIM-SM so as to elect a new E-BSR from all the C-BSRs.
The method as described above, optionally, further includes:
and if the C-BSR is elected as a new E-BSR, the new E-BSR collects Rendezvous Point (RP) information in the PIM-SM and sends bootstrap information to other C-BSRs, wherein the bootstrap information comprises the RP information.
As in the above method, optionally, the detecting, by the candidate bootstrap router C-BSR, whether the selected router E-BSR is abnormal includes:
the C-BSR detects whether the IP address of the E-BSR can be reached, and if the IP address can be reached, the E-BSR is determined to be normal;
otherwise, determining that the E-BSR is abnormal.
As in the above method, optionally, before the C-BSR detects whether an E-BSR selected from the routers is abnormal, the method further includes:
and the C-BSR determines that the rendezvous point RP fails.
As in the above method, optionally, the electing a new E-BSR from all C-BSRs includes:
and determining a new E-BSR according to the priorities of all the C-BSRs.
In a second aspect, an embodiment of the present invention provides a candidate bootstrap router C-BSR, which is applied to a sparse mode protocol independent multicast PIM-SM, and includes:
the detection module is used for detecting whether the E-BSR of the selected router is abnormal or not;
and the election module is used for sending a BSR election message of a bootstrap router to other C-BSRs in the PIM-SM so as to elect a new E-BSR from all the C-BSRs if the E-BSR is abnormal.
As the above C-BSR, optionally, further comprising:
and the sending module is used for collecting the RP information of the convergent point in the PIM-SM and sending bootstrap information to other C-BSRs if the C-BSR is elected as a new E-BSR, wherein the bootstrap information comprises the RP information.
As for the above C-BSR, optionally, the detecting module is specifically configured to:
detecting whether the IP address of the E-BSR is reachable, and if the IP address is reachable, determining that the E-BSR is normal;
otherwise, determining that the E-BSR is abnormal.
In a third aspect, an embodiment of the present invention provides an electronic device, including:
the processor and the memory are communicated with each other through a bus; the memory stores program instructions executable by the processor, the processor invoking the program instructions to perform a method comprising: the candidate bootstrap router C-BSR detects whether the selected router E-BSR is abnormal; and if the E-BSR is abnormal, the C-BSR sends a BSR election message to other C-BSRs in the PIM-SM so as to elect a new E-BSR from all the C-BSRs.
In a fourth aspect, an embodiment of the present invention provides a storage medium, on which a computer program is stored, where the computer program, when executed by a processor, implements the following method: the candidate bootstrap router C-BSR detects whether the selected router E-BSR is abnormal; and if the E-BSR is abnormal, the C-BSR sends a BSR election message to other C-BSRs in the PIM-SM so as to elect a new E-BSR from all the C-BSRs.
According to the fault processing method for the multicast service, provided by the embodiment of the invention, when the E-BSR and the RP have faults simultaneously, a new E-BSR can be selected from other C-BSRs rapidly, all equipment in a multicast network can obtain new RP information rapidly, and the multicast service can be recovered rapidly after the E-BSR and the RP have faults simultaneously.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and those skilled in the art can also obtain other drawings according to the drawings without creative efforts.
FIG. 1 is a schematic diagram of a PIM-SM multicast network deployment;
fig. 2 is a schematic flow chart of a fault processing method for multicast services according to an embodiment of the present invention;
fig. 3 is a schematic flowchart of a fault handling method for multicast services according to another embodiment of the present invention;
fig. 4 is a schematic structural diagram of a C-BSR according to an embodiment of the present invention;
fig. 5 is a schematic structural diagram of an electronic device according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Fig. 2 is a schematic flow chart of a fault handling method for multicast service according to an embodiment of the present invention, which is applied to sparse mode protocol independent multicast PIM-SM, and as shown in fig. 2, the method includes:
step S21, the candidate bootstrap router C-BSR detects whether the selected router E-BSR is abnormal;
in particular, in a multicast PIM-SM network deployment, the RP is the core role of the overall multicast network. And RP information is collected through the E-BSR and announced to all routers in the network, when the E-BSR and the RP simultaneously have faults, if other C-BSRs do not receive the bootstrap message in a period of 130s, all other C-BSRs initiate a round of election again, and one C-BSR is elected to be the E-BSR. Before the new E-BSR is elected, the multicast network can not obtain the new RP information, and the multicast service in the whole network is interrupted.
In order to solve the above problem, in the embodiment of the present invention, all C-BSRs in PIM-SM may actively detect whether an E-BSR selected from a selected router is abnormal, the C-BSR determines whether the E-BSR is abnormal by detecting whether a route between the C-BSR and the E-BSR is reachable, if an IP address of one C-BSR detecting the E-BSR is not reachable, it is determined that the E-BSR is abnormal, and if IP addresses of all C-BSRs detecting the E-BSR are reachable, it is determined that the E-BSR is normal. In practical application, the C-BSR can monitor the state information of the E-BSR in real time, the unreachable IP address can be detected through a unicast routing protocol, and when the IP address is unreachable, the unicast routing can identify that the routing is unavailable at millisecond level fastest.
Step S22, if the E-BSR is abnormal, the C-BSR sends a bootstrap router BSR election message to other C-BSRs in the PIM-SM, so as to elect a new E-BSR from all the C-BSRs.
Specifically, after the E-BSR is detected to be abnormal, the E-BSR is considered to have a fault, the election of the BSR needs to be carried out again, the C-BSR sends a BSR election message to other C-BSRs in the PIM-SM, all the C-BSRs reselect a new E-BSR, and the C-BSR initiates the election again after detecting that the E-BSR is abnormal without waiting for 130s, so that the multicast service is recovered quickly.
In the method for processing a failure of a multicast service provided in the embodiment of the present invention, after detecting that an E-BSR of a selected router is abnormal, a candidate bootstrap router C-BSR sends a BSR election packet to other C-BSRs in a PIM-SM, so that all C-BSRs rapidly elect a new E-BSR, and the multicast service can be rapidly recovered.
On the basis of the above embodiment, further, the method further includes:
and if the C-BSR is elected as a new E-BSR, the new E-BSR collects Rendezvous Point (RP) information in the PIM-SM and sends bootstrap information to other C-BSRs, wherein the bootstrap information comprises the RP information.
Specifically, since a new E-BSR is elected among all C-BSRs, each C-BSR may be elected as a new E-BSR, and if the C-BSR sending the bootstrap router BSR election packet is elected as a new E-BSR, the new E-BSR needs to assume E-BSR responsibility, that is, collect rendezvous point RP information in the PIM-SM and send bootstrap information BSMs, such as broadcast BSMs, to other C-BSRs, where the BSMs include the RP information.
On the basis of the foregoing embodiments, further, before the C-BSR detects whether an E-BSR selected from the routers is abnormal, the method further includes:
and the C-BSR determines that the rendezvous point RP fails.
Specifically, in practical application, if the E-BSR fails but the RP fails, the entire PIM-SM multicast service may continue, and when the E-BSR and the RP fail at the same time, other C-BSRs may not acquire new RP information, and the multicast service in the entire network is interrupted. Therefore, in the embodiment of the present invention, before whether the E-BSR of the selected router is abnormal or not, it may be further determined that the rendezvous point RP fails, and specifically, if the E-BSR fails after the RP fails, the C-BSR may determine that the RP fails through the BSM broadcast by the E-BSR.
When the E-BSR and the RP simultaneously fail, the C-BSR does not need to wait for 130s, and can directly initiate E-BSR election, so that a new E-BSR can be elected quickly after the E-BSR fails, new RP information is obtained, and multicast service can be recovered quickly after the E-BSR and the RP simultaneously fail.
Based on the above embodiments, further, the electing a new E-BSR from all C-BSRs includes:
and determining a new E-BSR according to the priorities of all the C-BSRs.
For example, there are three C-BSRs in PIM-SM, which are: router a, priority 100, IP address 4.1.1.1, router B, priority 110, IP address: 2.1.1.1, router C, priority 110, IP address 3.1.1.1. Comparing priorities, wherein the router A, the router B and the router C are all configured to be C-BSR, the C-BSR configuration priority of the router A is 100, the C-BSR priority of the router B and the router C is 110, and the E-BSR elects from the C-BSR with high priority according to an election algorithm of a bootstrap router. And then, because the priority of the C-BSR of the router B is the same as that of the router C, election is carried out according to the IP of the C-BSR at the moment, the election with a large IP address is the E-BSR, and finally the router C elects the E-BSR. The new E-BSR (router C) will collect all RP information in the current PIM-SM network, encapsulate it into the next self-reported message and advertise to all routers in the network.
Fig. 3 is a schematic flow chart of a fault handling method for multicast service according to another embodiment of the present invention, and as shown in fig. 3, after a device is configured as a C-BSR, BSR election is performed in a multicast PIM-SM model network, and if an election result is an E-BSR, RP information in the multicast network is collected and encapsulated in BSM information and is distributed to all multicast devices in the multicast network. And if the election result is the C-BSR, monitoring the state of the E-BSR in real time on the equipment, namely detecting the route reachability from the equipment to the E-BSR, and if the IP address to the E-BSR is not reachable, determining that the E-BSR has failed and needing to perform the election of the BSR again.
And after the E-BSR fault is detected, re-electing the BSR, if the electing equipment is the E-BSR, collecting RP information in the multicast network, encapsulating the RP information in the BSM information and issuing the RP information to all multicast equipment in the multicast network. And if the equipment is not the E-BSR after the re-election, the equipment continues to monitor a new E-BSR state.
According to the fault processing method for the multicast service, provided by the embodiment of the invention, when the E-BSR and the RP have faults simultaneously, a new E-BSR can be selected from other C-BSRs rapidly, all equipment in a multicast network can obtain new RP information rapidly, and the multicast service can be recovered rapidly after the E-BSR and the RP have faults simultaneously.
Based on the same inventive concept, an embodiment of the present invention further provides a candidate bootstrap router C-BSR, which is applied in a sparse mode protocol independent multicast PIM-SM, as shown in fig. 4, and includes: a detection module 41 and an election module 42, wherein:
the detection module 41 is configured to detect whether an E-BSR selected from the routers is abnormal; the election module 42 is configured to send a BSR election packet to other C-BSRs in the PIM-SM if the E-BSR is abnormal, so as to elect a new E-BSR from all C-BSRs.
As the above C-BSR, further, the method further includes:
and the sending module is used for collecting the RP information of the convergent point in the PIM-SM and sending bootstrap information to other C-BSRs if the C-BSR is elected as a new E-BSR, wherein the bootstrap information comprises the RP information.
As for the above C-BSR, further, the detecting module 41 is specifically configured to:
detecting whether the IP address of the E-BSR is reachable, and if the IP address is reachable, determining that the E-BSR is normal;
otherwise, determining that the E-BSR is abnormal.
As for the above C-BSR, further, the election module 42 is specifically configured to:
and determining a new E-BSR according to the priorities of all the C-BSRs.
The apparatus provided in the embodiment of the present invention is configured to implement the method, and its functions specifically refer to the method embodiment, which is not described herein again.
Fig. 5 is a schematic structural diagram of an electronic device according to an embodiment of the present invention, and as shown in fig. 5, the electronic device includes: a processor (processor)51, a memory (memory)52, and a bus 53;
wherein, the processor 51 and the memory 52 complete the communication with each other through the bus 53;
the processor 51 is configured to call program instructions in the memory 52 to perform the methods provided by the above-mentioned method embodiments, including, for example: the candidate bootstrap router C-BSR detects whether the selected router E-BSR is abnormal; and if the E-BSR is abnormal, the C-BSR sends a BSR election message to other C-BSRs in the PIM-SM so as to elect a new E-BSR from all the C-BSRs.
An embodiment of the present invention discloses a computer program product, which includes a computer program stored on a non-transitory computer readable storage medium, the computer program including program instructions, when the program instructions are executed by a computer, the computer can execute the methods provided by the above method embodiments, for example, the method includes: the candidate bootstrap router C-BSR detects whether the selected router E-BSR is abnormal; and if the E-BSR is abnormal, the C-BSR sends a BSR election message to other C-BSRs in the PIM-SM so as to elect a new E-BSR from all the C-BSRs.
Embodiments of the present invention provide a non-transitory computer-readable storage medium, which stores computer instructions, where the computer instructions cause the computer to perform the methods provided by the above method embodiments, for example, the methods include: the candidate bootstrap router C-BSR detects whether the selected router E-BSR is abnormal; and if the E-BSR is abnormal, the C-BSR sends a BSR election message to other C-BSRs in the PIM-SM so as to elect a new E-BSR from all the C-BSRs.
Those of ordinary skill in the art will understand that: all or part of the steps for realizing the method embodiments can be completed by hardware related to program instructions, the program can be stored in a computer readable storage medium, and the program executes the steps comprising the method embodiments when executed; and the aforementioned storage medium includes: various media that can store program codes, such as ROM, RAM, magnetic or optical disks.
The above-described embodiments of the apparatuses and the like are merely illustrative, wherein the units described as separate parts may or may not be physically separate, and the parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of the present embodiment. One of ordinary skill in the art can understand and implement it without inventive effort.
Through the above description of the embodiments, those skilled in the art will clearly understand that each embodiment can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware. With this understanding in mind, the above-described technical solutions may be embodied in the form of a software product, which can be stored in a computer-readable storage medium such as ROM/RAM, magnetic disk, optical disk, etc., and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute the methods described in the embodiments or some parts of the embodiments.
Finally, it should be noted that: the above embodiments are only used for illustrating the technical solutions of the embodiments of the present invention, and are not limited thereto; although embodiments of the present invention have been described in detail with reference to the foregoing embodiments, those skilled in the art will understand that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (10)
1. A fault processing method of multicast service is applied to sparse mode protocol independent multicast PIM-SM, which is characterized in that the method comprises the following steps:
the candidate bootstrap router C-BSR detects whether the selected router E-BSR is abnormal;
and if the E-BSR is abnormal, the C-BSR sends a BSR election message to other C-BSRs in the PIM-SM so as to elect a new E-BSR from all the C-BSRs.
2. The method of claim 1, further comprising:
and if the C-BSR is elected as a new E-BSR, the new E-BSR collects Rendezvous Point (RP) information in the PIM-SM and sends bootstrap information to other C-BSRs, wherein the bootstrap information comprises the RP information.
3. The method of claim 1, wherein the C-BSR detecting whether an E-BSR selected from the candidate routers is abnormal comprises:
the C-BSR detects whether the IP address of the E-BSR can be reached, and if the IP address can be reached, the E-BSR is determined to be normal;
otherwise, determining that the E-BSR is abnormal.
4. The method of claim 1, wherein the C-BSR detects whether an E-BSR is abnormal when a selected router is selected, further comprising:
and the C-BSR determines that the rendezvous point RP fails.
5. The method according to any of claims 1-4, wherein the electing a new E-BSR from all C-BSRs comprises:
and determining a new E-BSR according to the priorities of all the C-BSRs.
6. A candidate bootstrap router C-BSR applied in sparse mode protocol independent multicast (PIM-SM) is characterized by comprising:
the detection module is used for detecting whether the E-BSR of the selected router is abnormal or not;
and the election module is used for sending a BSR election message of a bootstrap router to other C-BSRs in the PIM-SM so as to elect a new E-BSR from all the C-BSRs if the E-BSR is abnormal.
7. The C-BSR of claim 6, further comprising:
and the sending module is used for collecting the RP information of the convergent point in the PIM-SM and sending bootstrap information to other C-BSRs if the C-BSR is elected as a new E-BSR, wherein the bootstrap information comprises the RP information.
8. The C-BSR according to claim 6, wherein the detection module is specifically configured to:
detecting whether the IP address of the E-BSR is reachable, and if the IP address is reachable, determining that the E-BSR is normal;
otherwise, determining that the E-BSR is abnormal.
9. An electronic device, comprising:
the processor and the memory are communicated with each other through a bus; the memory stores program instructions executable by the processor, the processor invoking the program instructions to perform the method of any of claims 1 to 5.
10. A computer-readable storage medium, on which a computer program is stored, which, when being executed by a processor, carries out the method according to any one of claims 1 to 5.
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