WO2019071585A1 - 路径切换过程中快速恢复业务的方法、装置和系统 - Google Patents

路径切换过程中快速恢复业务的方法、装置和系统 Download PDF

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Publication number
WO2019071585A1
WO2019071585A1 PCT/CN2017/106113 CN2017106113W WO2019071585A1 WO 2019071585 A1 WO2019071585 A1 WO 2019071585A1 CN 2017106113 W CN2017106113 W CN 2017106113W WO 2019071585 A1 WO2019071585 A1 WO 2019071585A1
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Prior art keywords
multicast
multicast control
server
control packet
interface
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PCT/CN2017/106113
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English (en)
French (fr)
Inventor
孟丽
李伟国
孟万红
高萌
Original Assignee
华为技术有限公司
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Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Priority to CN201780093355.1A priority Critical patent/CN110945847B/zh
Priority to PCT/CN2017/106113 priority patent/WO2019071585A1/zh
Priority to EP17928191.0A priority patent/EP3687131A1/en
Publication of WO2019071585A1 publication Critical patent/WO2019071585A1/zh

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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
    • H04L45/16—Multipoint routing
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • 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
    • H04L12/1886—Arrangements for providing special services to substations for broadcast or conference, e.g. multicast with traffic restrictions for efficiency improvement, e.g. involving subnets or subdomains
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
    • H04L12/42—Loop networks
    • H04L12/437—Ring fault isolation or reconfiguration
    • 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
    • H04L45/00—Routing or path finding of packets in data switching networks
    • H04L45/28—Routing or path finding of packets in data switching networks using route fault recovery
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L49/00—Packet switching elements
    • H04L49/20—Support for services
    • H04L49/201—Multicast operation; Broadcast operation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L9/00—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols
    • H04L9/40—Network security protocols

Definitions

  • the present application relates to the field of communications technologies, and in particular, to a method, apparatus, and system for quickly recovering services in a path switching process.
  • the switches that make up the network system are connected end to end in sequence, forming a ring network in the physical structure. It can be seen from the broadcast domain of the Layer 2 switched network that the physical ring causes a broadcast storm. Therefore, you need to run the ring network control protocol to selectively block certain ports. Finally, the loop network structure is trimmed into a loop-free tree network structure to prevent packets from accumulating and infinite loops in the loop network. The packet processing capability caused by the switch receiving the same packet is reduced.
  • LACP Link Aggregation Control Protocol
  • ERPS Ethernet ring protection switching
  • PS protection switching
  • Link management protocols such as Enhanced Trunk (Etrunk) set traffic path blocking. The blocking will discard multicast control packets and multicast service packets. Only the link management protocol packets of the LACP, ERPS, PS protection group, and Etrunk are allowed to pass. The blocking action of the ring network protocol discards the multicast control packet. As a result, the multicast control packet needs to be renegotiated when the device is unblocked. As a result, the service recovery takes more time and the user experience is not good.
  • LACP Link Aggregation Control Protocol
  • ERPS Ethernet ring protection switching
  • PS protection switching
  • the embodiment of the present invention provides a method, a device, and a system for quickly recovering a service in a path switching process.
  • a multicast control packet can be sent to a blocking node to send a multicast server.
  • the node is blocked, the first device has established a service with the multicast server.
  • Negotiation of protocols and establishment of forwarding entries greatly improve the recovery speed of multicast services and improve the user experience.
  • the embodiment of the present application provides a method for quickly recovering a service in a path switching process, where the first device sends a multicast control packet through the first interface and the second interface in a ring network or multiple forwarding path scenario.
  • the multicast control packet carries a transparent transmission identifier, wherein the port of at least one of the second device and the third device is in a blocking state controlled by a ring network protocol, where the second device Or the third device is connected to the multicast server, and the multicast control packet is sent to the multicast server through the ports of the second device and the third device, and a service protocol negotiation is established with the multicast server. Establish a forwarding entry.
  • the first device After the switching of the blocking state controlled by the ring network protocol of the second device and the third device, the first device can receive the multicast service packet sent by the multicast server from the first path or the second path, which greatly improves the The recovery speed of the multicast service is completely delayed by the user.
  • the method for quickly recovering a service in the path switching process includes: determining, by the second device or the third device, whether the multicast control packet is carried after receiving the multicast control packet Transparent transmission And, if the transparent transmission identifier is carried, the multicast control packet is transparently transmitted to the multicast server.
  • the method before the sending, by the first interface, the second interface, the multicast control packet to the second device and the third device, the method further includes: receiving the multicast packet and identifying the multicast control packet; Add a custom penetration identifier to the multicast control message.
  • the method for quickly recovering the service in the path switching process further includes: replicating the multicast control packet with the custom penetration identifier to obtain multiple multicast control messages.
  • the sending, by the second device, the port of the second device and the third device to the multicast server further includes: sending, by the second device, the multicast control packet
  • the fourth device the third device sends the multicast control message to the fifth device, where the fourth device is connected between the second device and the multicast server; The device is connected between the third device and the multicast server.
  • an embodiment of the present application provides a device, where the device is connected to a second device and a third device by using a first interface and a second interface, where a port of at least one of the second device and the third device is The blocking state is controlled by the ring network protocol, where the second device or the third device is connected to the multicast server, including:
  • a sending unit configured to send, by using the first interface and the second interface, a multicast control message to the second device and the third device, where the multicast control message carries a transparent transmission identifier, where the second device and the second device
  • the port of at least one of the three devices is in a blocking state controlled by a ring network protocol, wherein the second device or the third device is connected to the multicast server, and the multicast control packet passes through the ports of the second device and the third device.
  • Sending to the multicast server establishing a service protocol negotiation with the multicast server, and establishing a forwarding entry;
  • the receiving unit is configured to receive the multicast service packet delivered by the multicast server from the first path or the second path after the ring state protocol controlled blocking state switching of the second device and the third device.
  • the second device or the third device determines whether the multicast control packet carries a transparent transmission identifier, and if the transparent transmission identifier is carried, the transparent transmission is performed.
  • the multicast control message is sent to the multicast server.
  • the receiving unit before the sending unit sends the multicast control message to the second device and the third device by using the first interface and the second interface, the receiving unit is further configured to receive the multicast packet and identify the Multicast control packet; adding a customized penetration identifier to the multicast control packet.
  • the processing unit is further configured to: copy a multicast control packet with a custom penetration identifier to obtain multiple multicast control messages.
  • the second device before the sending, by the second device, the port of the second device and the third device to the multicast server, the second device further includes: sending, by the second device, the multicast control packet to the fourth The third device sends the multicast control message to the fifth device; wherein the fourth device is connected between the second device and the multicast server; wherein the fifth device is connected to the device Between the third device and the multicast server.
  • the embodiment of the present application provides a multicast system, where the system includes a first device, a second device, a third device, and a voice multicast server, where the first device passes through the first interface and the second interface respectively. Connecting to the second device and the third device, wherein the port of at least one of the second device and the third device is in a blocking state controlled by a ring network protocol, wherein the second device or the third device are both connected to the multicast server, where :
  • the first device sends a multicast control message to the second device and the third device by using the first interface and the second interface, where the multicast control packet carries a transparent transmission identifier, where the second device and the second device
  • the port of at least one of the three devices is in a blocking state controlled by a ring network protocol, where the second device or the third device is connected to the multicast service.
  • the multicast control packet is sent to the multicast server through a port of the second device and the third device, and a service protocol negotiation is established with the multicast server, and a forwarding entry is established; After the switching of the blocking state controlled by the ring network protocol of the second device and the third device, the first device receives the multicast service packet sent by the multicast server from the first path or the second path.
  • the second device or the third device determines whether the multicast control packet carries a transparent transmission identifier, and if the transparent transmission identifier is carried, the transparent transmission is performed.
  • the multicast control message is sent to the multicast server.
  • the first device sends the multicast control packet to the second device and the third device respectively before the first interface and the second interface, and is configured to identify the group after receiving the multicast packet.
  • the control packet is broadcast and a customized penetration identifier is added to the multicast control message.
  • the first device is further configured to: replicate a multicast control packet with a custom penetration identifier to obtain multiple multicast control messages.
  • the method before the multicast control packet is sent to the multicast server by using the port of the second device and the third device, the method further includes:
  • the second device sends the multicast control packet to the fourth device; the third device sends the multicast control packet to the fifth device;
  • the fourth device is connected between the second device and the multicast server; wherein the fifth device is connected between the third device and the multicast server.
  • an embodiment of the present application provides an apparatus, including: a processor, a memory, a bus, and a communication interface; the memory is configured to store a computer execution instruction, and the processor is connected to the memory through the bus, when the device runs The processor executes the computer-executed instructions stored by the memory to perform the aforementioned method.
  • the embodiment of the present application adds a tunneling identifier to the multicast control packet, so that the multicast control packet can pass through the blocking node to send the multicast server, so that the first device can establish a service protocol with the multicast server in advance.
  • negotiation and establishment of forwarding entries When the blocking node is unblocked, the first device can receive the multicast service packets from the multicast server. The user does not experience the delay of the service switching, which greatly improves the recovery speed and improves the multicast service. The user experience.
  • FIG. 1 is a schematic block diagram of an application scenario of a technical solution according to an embodiment of the present application.
  • FIG. 2 is a schematic block diagram of an application scenario of a technical solution according to an embodiment of the present application.
  • FIG. 3 is a flowchart of a method for quickly recovering a service in a path switching process according to an embodiment of the present application.
  • FIG. 4 is a flowchart of another method for quickly recovering a service in a path switching process according to an embodiment of the present application.
  • 5A and 5B are schematic block diagrams of an apparatus according to an embodiment of the present application.
  • FIG. 6 is a schematic block diagram of a system according to an embodiment of the present application.
  • FIG. 7 is a schematic block diagram of a communication device according to an embodiment of the present application.
  • FIG. 1 and FIG. 2 are schematic block diagrams of an application scenario according to an embodiment of the present application, as shown in FIG. 1 and Figure 2, in the ring network or multiple forwarding path scenario, the device (Device A) sends multicast control packets to the two ports (A P1 and A P2) respectively, and the multicast control packet is transmitted through Device B.
  • the packet can be successfully forwarded to the multicast server, and the multicast control packet passing through Device C can also pass through the blocking set by the ring network protocol and finally reach the multicast server.
  • the two path multicast control packets reach the server and are established.
  • the multicast server forwards the video packets to the two paths at the same time.
  • the multicast service packets sent through Device B are sent to Device A.
  • the multicast service packets sent to Device C are discarded due to the blocking of the ring network protocol.
  • Device A will only receive one multicast service packet.
  • the ring network protocol controls the change of the blocking point. As a result, the forwarding path is switched.
  • the P1 of Device C is unblocked.
  • the multicast service packet is forwarded to Device A.
  • the time-consuming of the path switching removes the negotiation of the service protocol and the time of establishing the entry. Only the ring network protocol and the link protection reconfigure the blocking time. The user can not experience the delay of the service switching completely, which greatly improves the multicast. The recovery speed of the business improves the user experience.
  • STP Spanning Tree Protocol
  • ERPS Ethernet Ring Protection Switching
  • Etrunk enhanced trunk
  • the device in the embodiment of the present application may be a core router (Core Router, CR), a broadband remote access server (BRAS), a LAN switch (LSW), and an optical line terminal (Optical Line).
  • the terminal, the OLT, the home gateway (HG), and the like are not limited in this embodiment of the present application.
  • FIG. 3 is a flowchart of a method for quickly recovering a service in a path switching process according to an embodiment of the present application, including the following steps:
  • the first device sends a multicast control message to the second device and the third device by using the first interface and the second interface, where the multicast control packet carries a transparent transmission identifier, where the second device and the second device
  • the port of at least one of the three devices is in a blocking state controlled by a ring network protocol, wherein the second device or the third device is connected to the multicast server, and the multicast control packet passes through the ports of the second device and the third device. Sent to the multicast server.
  • the multicast server establishes a negotiation with a service protocol of the first device, and establishes a forwarding entry.
  • the first device receives the multicast service packet sent by the multicast server from the first path or the second path after the ring state controlled by the ring network protocol of the second device and the third device is switched.
  • step S303 as shown in FIG. 2, the ring network protocol controls the change of the blocking point, and the forwarding path is switched.
  • the P1 of the device C is unblocked.
  • the multicast service packet sent by the multicast server is immediately formed because the forwarding entry has been established. Forward to Device A through Device B.
  • the embodiment of the present application adds a penetration identifier to the multicast control packet, so that the multicast control packet can pass through the blocking node to send the multicast server, so that the first device can establish a service protocol negotiation and establish a transfer with the multicast server in advance. Publish the item.
  • the blocking node is unblocked, the first device can receive the multicast service packets from the multicast server.
  • the user does not experience the delay of the service switching, which greatly improves the recovery speed and improves the multicast service. The user experience.
  • FIG. 4 is a method for quickly recovering a service in a path switching process according to an embodiment of the present application. The steps are as follows:
  • the first device receives the multicast packet and identifies the multicast control packet, and adds a custom penetration identifier to the multicast control packet.
  • the first device replicates the multicast control packet with the custom penetration identifier to obtain multiple multicast control reports.
  • the first device sends a multicast control packet to the second device and the third device by using the first interface and the second interface, where the multicast control packet carries a transparent transmission identifier, where the second device and the second device
  • the port of at least one of the three devices is in a blocking state controlled by a ring network protocol, wherein the second device or the third device is connected to the multicast server, and the multicast control packet passes through the ports of the second device and the third device. Sent to the multicast server.
  • step S404 After receiving the multicast control packet, the second device or the third device determines whether the multicast control packet carries a transparent transmission identifier, and if the transparent transmission identifier is carried, proceeds to step S405; If the transparent transmission identifier is not carried, the process proceeds to step S406.
  • S405 Transparently transmit the multicast control packet to the multicast server.
  • S406 Discard the multicast control packet.
  • the multicast server establishes a negotiation with a service protocol of the first device, and establishes a forwarding entry.
  • the first device After the ring state controlled by the ring network protocol of the second device and the third device is switched, the first device receives the multicast service packet sent by the multicast server from the first path or the second path.
  • the second device may further send the multicast control packet to the fourth device, where the third device may further send the multicast control packet to the fifth device, where the fourth device Connected between the second device and the multicast server, the fifth device is connected between the third device and the multicast server.
  • the fourth device and the fifth device receive the multicast control message and further send the message to the multicast server.
  • the embodiment of the present application adds a penetration identifier to the multicast control packet, so that the multicast control packet can pass through the blocking node to send the multicast server, so that the first device can establish a service protocol negotiation and establish a transfer with the multicast server in advance. Publish the item.
  • the blocking node is unblocked, the first device can receive the multicast service packets from the multicast server.
  • the user does not experience the delay of the service switching, which greatly improves the recovery speed and improves the multicast service. The user experience.
  • an embodiment of the present application provides a device, where the device is connected to a second device and a third device by using a first interface and a second interface, where the second device and the third device are respectively
  • the port of at least one of the devices is in a blocking state controlled by a ring network protocol, wherein the second device or the third device is connected to the multicast server, and the device 500 includes:
  • the sending unit 501 is configured to send, by using the first interface and the second interface, a multicast control message to the second device and the third device, where the multicast control packet carries a transparent transmission identifier, where the second device and The port of at least one of the third device is in a blocking state controlled by a ring network protocol, where the second device or the third device is connected to the multicast server, and the multicast control packet passes through the second device and the third device.
  • the receiving unit 502 is configured to receive the multicast service packet delivered by the multicast server from the first path or the second path after the ring state protocol controlled by the second device and the third device is switched.
  • the first one is, for the message directly forwarded by the hardware, the first device takes the time.
  • the second device and the third device identify the multicast control packet through the existing packet parsing module. Text, handed over to the message processing module.
  • the packet processing module performs the following judgment: if it is in the blocking state, the multicast control packet that passes the label is allowed to continue to be forwarded, and the multicast control packet without the penetration label is directly discarded. If it is not blocked, all the packets are allowed. Forward.
  • the second type is that, for the packet sent by the CPU software, the second device and the third device identify the multicast control packet by using the existing packet parsing module, and send the packet to the software packet processing module.
  • the software packet processing module makes a judgment: if it is in the blocking state, the packet with the penetrating flag allows the CPU software to continue the processing, and the packet without the penetrating flag is directly discarded; if it is not blocked, all the packets continue to be executed by the CPU software. Forward processing.
  • the second device or the third device determines whether the multicast control packet carries a transparent transmission identifier, and if the transparent transmission identifier is carried, the transparent transmission is performed.
  • the multicast control message is sent to the multicast server.
  • the device 500 further includes a processing unit 503, where the sending unit sends the multicast control message to the second device and the third device respectively through the first interface and the second interface.
  • the receiving unit is further configured to receive the multicast packet and identify the multicast control packet, and send the multicast control packet to the processing unit 503, where the processing unit 503 identifies the multicast control packet and adds the multicast control packet.
  • Customized penetration ID In an implementation manner, the processing unit 503 is further configured to: copy the multicast control packet to which the custom penetration identifier is added to obtain multiple multicast control packets, and then send the multicast control packets to the second device and the third device respectively.
  • the second control device before the sending, by the second device, the third device, the third device, and the third device to the multicast server, the second control device further includes: the second device Broadcasting the control message to the fourth device; the third device sends the multicast control message to the fifth device; wherein the fourth device is connected between the second device and the multicast server; The fifth device is connected between the third device and the multicast server.
  • the embodiment of the present application provides a multicast system, where the system includes a first device 601, a second device 602, a third device 603, and a voice multicast server 604.
  • An interface and a second interface are respectively connected to the second device 602 and the third device 603, wherein the port of at least one of the second device 602 and the third device 603 is in a blocking state controlled by a ring network protocol, wherein the second device 602 And the third device 603 is both connected to the multicast server 604, wherein:
  • the first device 601 sends a multicast control message to the second device 602 and the third device 603 through the first interface and the second interface respectively.
  • the multicast control packet carries a transparent transmission identifier, and the multicast control packet passes through the device.
  • the ports of the second device 602 and the third device 603 are sent to the multicast server 604 and establish a negotiation of a service protocol with the multicast server 604 and establish a forwarding entry.
  • the first device 601 receives the multicast service packet delivered by the multicast server 604 from the first path or the second path.
  • the first device 601 is configured to send the multicast control packet to the second device 602 and the third device 603 before the first interface and the second interface respectively, and is further configured to: after receiving the multicast packet, identify the The multicast control packet adds a customized penetration identifier to the multicast control packet.
  • the first device 602 is further configured to: copy the multicast control packet with the customized penetration identifier to obtain multiple multicast control messages.
  • the second device 602 sends the multicast control packet to the multicast control packet.
  • the fourth device (not shown).
  • the third device sends the multicast control message to the fifth device (not shown).
  • the fourth device is connected between the second device and the multicast server, and the fifth device is connected between the third device and the multicast server.
  • the fourth device and the fifth device receive the multicast control message and further send the message to the multicast server.
  • an embodiment of the present application provides a device, where the device 110 includes a processor 112, a communication interface 113, and a memory 111.
  • the PE 110 may also include a bus 114.
  • the communication interface 113, the processor 112, and the memory 111 may be connected to each other through a bus 114.
  • the bus 114 may be a Peripheral Component Interconnect (PCI) bus or an Extended Industry Standard Architecture (EISA). Bus, etc.
  • PCI Peripheral Component Interconnect
  • EISA Extended Industry Standard Architecture
  • the bus 114 can be divided into an address bus, a data bus, a control bus, and the like. For ease of representation, only one thick line is shown in Figure 7, but it does not mean that there is only one bus or one type of bus.
  • the memory 111 is used to store instructions executable by the processor 112, and the processor 112 is configured to invoke instructions stored in the memory 111 to perform the steps in the method of quickly recovering services in the foregoing path switching process.
  • All or part of the steps of implementing the above method embodiments may be performed by hardware associated with the program instructions.
  • the aforementioned program can be stored in a readable memory.
  • the program when executed, performs the steps including the foregoing method embodiments; and the foregoing memory (storage medium) includes: read-only memory (ROM), RAM, flash memory, hard disk, solid state hard disk, tape (magnetic tape), floppy disk, optical disc, and any combination thereof.

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  • Computer Networks & Wireless Communication (AREA)
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  • Computer Security & Cryptography (AREA)
  • Data Exchanges In Wide-Area Networks (AREA)

Abstract

本申请实施例提供了一种路径切换过程中快速恢复业务的方法、装置和系统，其中方法包括：第一设备通过第一接口和第二接口分别发送组播控制报文给第二设备和第三设备，组播控制报文携带有透明传输标识，其中第二设备和第三设备中至少一个的端口处于环网协议控制的阻塞状态，组播控制报文通过所述第二设备和第三设备的端口发送至所述组播服务器并与所述组播服务器建立业务协议的协商和建立转发表项。本申请实施例使组播控制报文可以穿透阻塞节点发送组播服务器，使第一设备可以与组播服务器提前建立业务协议的协商和建立转发表项。阻塞节点解除阻塞时，第一设备即可从正常路径接收组播服务器下发的组播业务报文，极大提高了组播业务的恢复速度。

Description

路径切换过程中快速恢复业务的方法、装置和系统 技术领域
本申请涉及通信技术领域，尤其涉及一种路径切换过程中快速恢复业务的方法、装置和系统。
背景技术
典型的环网拓扑中，构成网络系统的交换机依次首尾相连，在物理结构上构成一个环形的网络。由二层交换网络的广播域可知，物理上的环会造成广播风暴。所以需要运行环网控制协议，有选择的对某些端口进行阻塞，最终将环路网络结构修剪成无环路的树型网络结构，从而防止报文在环路网络中不断增生和无限循环，避免交换机由于重复接收相同的报文造成的报文处理能力下降。
除了环网保护协议设置的业务路径阻塞，还有链路聚合控制协议(Link Aggregation Control Protocol，LACP)、以太网环保护(Ethernet ring protection switching，ERPS)，保护倒换(Protect Switch,PS)保护组，增强干道(Enhanced Trunk，Etrunk)等链路管理协议会设置业务路径阻塞。阻塞都会丢弃组播控制报文和组播业务报文，只允许LACP、ERPS，PS保护组、Etrunk的链路管理协议报文通过。环网协议的阻塞动作丢弃了组播控制报文，导致解除阻塞时组播控制报文需要重新协商，导致业务恢复耗时多，用户体验不佳。
发明内容
本申请实施例提供一种路径切换过程中快速恢复业务的方法、装置和系统，组播控制报文可以穿透阻塞节点发送组播服务器，节点阻塞解除时第一设备已经与组播服务器建立业务协议的协商和建立转发表项，极大提高了组播业务的恢复速度，改善了用户体验。
第一方面，本申请实施例提供了一种路径切换过程中快速恢复业务的方法，包括：环网或者多转发路径场景下第一设备通过第一接口和第二接口分别发送组播控制报文给第二设备和第三设备，所述组播控制报文携带有透明传输标识，其中所述第二设备和第三设备中至少一个的端口处于环网协议控制的阻塞状态，其中第二设备或第三设备均连接至组播服务器，所述组播控制报文通过所述第二设备和第三设备的端口发送至所述组播服务器并与所述组播服务器建立业务协议的协商和建立转发表项。第二设备和第三设备的环网协议控制的阻塞状态切换后，第一设备即可从第一路径或者第二路径接收所述组播服务器下发的组播业务报文，极大提高了组播业务的恢复速度，用户完全体验不到业务切换的时延。
一种实现方式中，所述的路径切换过程中快速恢复业务的方法，包括：所述第二设备或第三设备接收到所述组播控制报文后判断所述组播控制报文是否携带有透明传输 标识，如果携带有透明传输标识，则透明传输所述组播控制报文至所述组播服务器。
一种实现方式中，所述通过第一接口和第二接口分别发送组播控制报文给第二设备和第三设备之前还进一步包括：接收组播报文并识别出组播控制报文；对所述组播控制报文添加自定义穿透标识。
一种实现方式中，所述路径切换过程中快速恢复业务的方法还包括复制添加了自定义穿透标识的组播控制报文得到多份组播控制报文。
一种实现方式中，所述组播控制报文通过所述第二设备和第三设备的端口发送至所述组播服务器之前还包括：所述第二设备将所述组播控制报文给第四设备；所述第三设备将所述组播控制报文给第五设备；其中，所述第四设备连接在所述第二设备和所述组播服务器之间；其中所述第五设备连接在所述第三设备和所述组播服务器之间。
第二方面，本申请实施例提供了一种设备，该设备通过第一接口和第二接口分别与第二设备和第三设备连接，其中所述第二设备和第三设备中至少一个的端口处于环网协议控制的阻塞状态，其中第二设备或第三设备均连接至组播服务器，包括：
发送单元，用于通过第一接口和第二接口分别发送组播控制报文给第二设备和第三设备，所述组播控制报文携带有透明传输标识，其中所述第二设备和第三设备中至少一个的端口处于环网协议控制的阻塞状态，其中第二设备或第三设备均与组播服务器连接，所述组播控制报文通过所述第二设备和第三设备的端口发送至所述组播服务器并与所述组播服务器建立业务协议的协商和建立转发表项；
接收单元，用于所述第二设备和第三设备的环网协议控制的阻塞状态切换后，从第一路径或者第二路径接收所述组播服务器下发的组播业务报文。
一种实现方式中，所述第二设备或第三设备接收到所述组播控制报文后判断所述组播控制报文是否携带有透明传输标识，如果携带有透明传输标识，则透明传输所述组播控制报文至所述组播服务器。
一种实现方式中，所述发送单元通过第一接口和第二接口分别发送组播控制报文给第二设备和第三设备之前，所述接收单元还用于接收组播报文并识别出组播控制报文；对所述组播控制报文添加自定义的穿透标识。
一种实现方式中，所述处理单元还用于复制添加了自定义穿透标识的组播控制报文得到多份组播控制报文。
一种实现方式中，所述组播控制报文通过所述第二设备和第三设备的端口发送至所述组播服务器之前还包括：第二设备将所述组播控制报文给第四设备；第三设备将所述组播控制报文给第五设备；其中，所述第四设备连接在所述第二设备和所述组播服务器之间；其中所述第五设备连接在所述第三设备和所述组播服务器之间。
第三方面，本申请实施例提供了一种组播系统，该系统包括第一设备、第二设备、第三设备和语音组播服务器，所述第一设备通过第一接口和第二接口分别与第二设备和第三设备连接，其中所述第二设备和第三设备中至少一个的端口处于环网协议控制的阻塞状态，其中第二设备或第三设备均连接至组播服务器，其中：
所述第一设备通过第一接口和第二接口分别发送组播控制报文给第二设备和第三设备，所述组播控制报文携带有透明传输标识，其中所述第二设备和第三设备中至少一个的端口处于环网协议控制的阻塞状态，其中第二设备或第三设备均连接至组播服 务器，所述组播控制报文通过所述第二设备和第三设备的端口发送至所述组播服务器并与所述组播服务器建立业务协议的协商和建立转发表项；所述第二设备和第三设备的环网协议控制的阻塞状态切换后，所述第一设备从第一路径或者第二路径接收所述组播服务器下发的组播业务报文。
一种实现方式中，所述第二设备或第三设备接收到所述组播控制报文后判断所述组播控制报文是否携带有透明传输标识，如果携带有透明传输标识，则透明传输所述组播控制报文至所述组播服务器。
一种实现方式中，所述第一设备通过第一接口和第二接口分别发送组播控制报文给第二设备和第三设备之前，还用于接收到组播报文后，识别出组播控制报文并对所述组播控制报文添加自定义的穿透标识。
一种实现方式中，所述第一设备还用于复制添加了自定义穿透标识的组播控制报文得到多份组播控制报文。
一种实现方式中，所述组播控制报文通过所述第二设备和第三设备的端口发送至所述组播服务器之前还包括：
第二设备将所述组播控制报文给第四设备；第三设备将所述组播控制报文给第五设备；
其中，所述第四设备连接在所述第二设备和所述组播服务器之间；其中所述第五设备连接在所述第三设备和所述组播服务器之间。
第四方面，本申请实施例提供了一种设备，包括：处理器、存储器、总线和通信接口；该存储器用于存储计算机执行指令，该处理器与该存储器通过该总线连接，当该设备运行时，该处理器执行该存储器存储的该计算机执行指令，以执行前述的方法。
综上所述，本申请实施例通过对组播控制报文添加穿透标识，使得组播控制报文可以穿透阻塞节点发送组播服务器，使第一设备可以与组播服务器提前建立业务协议的协商和建立转发表项。阻塞节点解除阻塞时，第一设备即可从正常路径接收组播服务器下发的组播业务报文，用户完全体验不到业务切换的时延，极大提高了组播业务的恢复速度，改善了用户体验。
附图说明
图1是根据本申请实施例的技术方案的一种应用场景的示意性框图
图2是根据本申请实施例的技术方案的一种应用场景的示意性框图。
图3是本申请实施例提供了一种路径切换过程中快速恢复业务的方法流程图。
图4是本申请实施例提供了一种路径切换过程中快速恢复业务的另一方法流程图。
图5A、5B是本申请实施例提供了一种设备的示意性框图。
图6是本申请实施例提供了一种系统示意性框图。
图7是本申请实施例提供的一种通信设备的示意性框图。
具体实施方式
下面将结合附图，对本申请中的技术方案进行描述。
图1和图2是根据本申请实施例的技术方案的一种应用场景的示意性框图，如图 1和图2所示，环网或者多转发路径场景下，设备(Device)A设备分别向2个端口(A P1和A P2)分别发送组播控制报文，经过Device B的组播控制报文能顺利转发到组播服务器，并且经过Device C的组播控制报文也能穿透环网协议设置的阻塞最终到达组播服务器，图中两条路径组播控制报文都达到服务器并建立了转发表项。组播服务器会同时往这两条路径转发视频报文，经过Device B的组播业务报文最后发送给Device A，而发送给Device C的组播业务报文由于环网协议设置的阻塞而丢弃，Device A只会收到一份组播业务报文。
环网协议控制阻塞点变化，导致转发路径切换，DeviceC的P1解除阻塞，由于转发表项已经建立，组播业务报文立即转发到Device A。路径切换的耗时去掉了业务协议的协商和建立表项时间，只留下环网协议和链路保护重新配置阻塞的时间，用户完全体验不到业务切换的时延，极大提高了组播业务的恢复速度，改善了用户体验。
需要说明的是，环网协议可能存在多种，比如，生成树协议(Spanning Tree Protocol，STP)以及各种在它基础上经过改进的生成树协议设置的阻塞，或者链路聚合组(Spanning Tree Protocol，LAG)协议设置的阻塞，以太网换保护(Ethernet Ring Protection Switching，ERPS)协议设置的阻塞，增强干道(Enhanced Trunk，Etrunk)协议设置的阻塞等等，本申请实施例不作任何限制。
可选地，本申请实施例中设备可以为核心路由器(Core Router，CR)、宽带远程接入服务器(Broadband Remote Access Server，BRAS)、局域网交换机(Lan Switch，LSW)、光线路终端(Optical Line Terminal，OLT)、家庭网关(Home Gateway，HG)等，本申请实施例对此不作限定。
如图3所示，图3为本申请实施例提供了一种路径切换过程中快速恢复业务的方法流程图，包括步骤如下：
S301：第一设备通过第一接口和第二接口分别发送组播控制报文给第二设备和第三设备，所述组播控制报文携带有透明传输标识，其中所述第二设备和第三设备中至少一个的端口处于环网协议控制的阻塞状态，其中第二设备或第三设备均连接至组播服务器，所述组播控制报文通过所述第二设备和第三设备的端口发送至所述组播服务器。
S302：组播服务器建立与第一设备的业务协议的协商和建立转发表项。
S303：第二设备和第三设备的环网协议控制的阻塞状态切换后，第一设备从第一路径或者第二路径接收所述组播服务器下发的组播业务报文。
对于上述步骤S303，如图2所示，环网协议控制阻塞点变化，导致转发路径切换，Device C的P1解除阻塞，由于转发表项已经建立，组播服务器下发的组播业务报文立即通过Device B转发到Device A。
本申请实施例通过对组播控制报文添加穿透标识，使得组播控制报文可以穿透阻塞节点发送组播服务器，使第一设备可以与组播服务器提前建立业务协议的协商和建立转发表项。阻塞节点解除阻塞时，第一设备即可从正常路径接收组播服务器下发的组播业务报文，用户完全体验不到业务切换的时延，极大提高了组播业务的恢复速度，改善了用户体验。
如图4所示，图4为本申请实施例提供了一种路径切换过程中快速恢复业务的方法， 包括步骤如下：
S401：第一设备接收组播报文并识别出组播控制报文；对所述组播控制报文添加自定义穿透标识。
S402：第一设备复制添加了自定义穿透标识的组播控制报文得到多份组播控制报。
S403：第一设备通过第一接口和第二接口分别发送组播控制报文给第二设备和第三设备，所述组播控制报文携带有透明传输标识，其中所述第二设备和第三设备中至少一个的端口处于环网协议控制的阻塞状态，其中第二设备或第三设备均连接至组播服务器，所述组播控制报文通过所述第二设备和第三设备的端口发送至所述组播服务器。
S404：所述第二设备或第三设备接收到所述组播控制报文后判断所述组播控制报文是否携带有透明传输标识，如果携带有透明传输标识，则转入步骤S405；如果未携带有透明传输标识，则转入步骤S406。
S405：透明传输所述组播控制报文至所述组播服务器。
S406：丢弃所述组播控制报文。
S407：所述组播服务器建立与第一设备的业务协议的协商和建立转发表项。
S408：第二设备和第三设备的环网协议控制的阻塞状态切换后，第一设备从第一路径或者第二路径接收所述组播服务器下发的组播业务报文。
以上只是举例说明，其他可能的实施方式中，第二设备还可以进一步将组播控制报文给第四设备，第三设备还可以进一步将组播控制报文给第五设备，其中第四设备连接在所述第二设备和所述组播服务器之间，第五设备连接在第三设备和组播服务器之间。第四设备和第五设备接收到组播控制报文进一步发送给组播服务器。
本申请实施例通过对组播控制报文添加穿透标识，使得组播控制报文可以穿透阻塞节点发送组播服务器，使第一设备可以与组播服务器提前建立业务协议的协商和建立转发表项。阻塞节点解除阻塞时，第一设备即可从正常路径接收组播服务器下发的组播业务报文，用户完全体验不到业务切换的时延，极大提高了组播业务的恢复速度，改善了用户体验。
如图5A所示，第二方面，本申请实施例提供了一种设备，该设备通过第一接口和第二接口分别与第二设备和第三设备连接，其中所述第二设备和第三设备中至少一个的端口处于环网协议控制的阻塞状态，其中第二设备或第三设备均连接至组播服务器，该设备500包括：
发送单元501，用于通过第一接口和第二接口分别发送组播控制报文给第二设备和第三设备，所述组播控制报文携带有透明传输标识，其中所述第二设备和第三设备中至少一个的端口处于环网协议控制的阻塞状态，其中第二设备或第三设备均与组播服务器连接，所述组播控制报文通过所述第二设备和第三设备的端口发送至所述组播服务器并与所述组播服务器建立业务协议的协商和建立转发表项；
接收单元502，用于所述第二设备和第三设备的环网协议控制的阻塞状态切换后，从第一路径或者第二路径接收所述组播服务器下发的组播业务报文。
具体的，可能存在两种情况，第一种是，对于硬件直接转发的报文，第一设备把期 望穿透的组播控制报文打上穿透标记，组播控制报文发送至第二设备和第三设备后，第二设备和第三设备通过已有的报文解析模块识别组播控制报文，交给报文处理模块。报文处理模块做如下判断：如果是阻塞状态，穿透标记的组播控制报文允许继续转发，没有穿透标记的组播控制报文直接丢弃；如果不是阻塞状态，则所有报文都允许转发。
第二种是，对于上送CPU软件转发的报文，第二设备和第三设备通过已有的报文解析模块识别组播控制报文，交给软件报文处理模块。软件报文处理模块做判断：如果是阻塞状态，带穿透标记的报文允许继续CPU软件转发处理，没有穿透标记的报文直接丢弃；如果不是阻塞状态，则所有报文继续进行CPU软件转发处理。
一种实现方式中，所述第二设备或第三设备接收到所述组播控制报文后判断所述组播控制报文是否携带有透明传输标识，如果携带有透明传输标识，则透明传输所述组播控制报文至所述组播服务器。
一种实现方式中，如图5B所示，该设备500还进一步包括处理单元503，所述发送单元通过第一接口和第二接口分别发送组播控制报文给第二设备和第三设备之前，所述接收单元还用于接收组播报文并识别出组播控制报文并发送给该处理单元503，该处理单元503识别出组播控制报文并对所述组播控制报文添加自定义的穿透标识。一种实现方式中，处理单元503还用于复制添加了自定义穿透标识的组播控制报文得到多份组播控制报文，然后分别发给第二设备和第三设备。
以上仅仅是举例说，其他可能的实施方式中，所述组播控制报文通过所述第二设备和第三设备的端口发送至所述组播服务器之前还包括：第二设备将所述组播控制报文给第四设备；第三设备将所述组播控制报文给第五设备；其中，所述第四设备连接在所述第二设备和所述组播服务器之间；其中所述第五设备连接在所述第三设备和所述组播服务器之间。
如图6所示，本申请实施例提供了一种组播系统，该系统包括第一设备601、第二设备602、第三设备603以及语音组播服务器604，所述第一设备601通过第一接口和第二接口分别与第二设备602和第三设备603连接，其中所述第二设备602和第三设备603中至少一个的端口处于环网协议控制的阻塞状态，其中第二设备602和第三设备603均连接至组播服务器604，其中：
第一设备601通过第一接口和第二接口分别发送组播控制报文给第二设备602和第三设备603，组播控制报文携带有透明传输标识，所述组播控制报文通过所述第二设备602和第三设备603的端口发送至所述组播服务器604并与所述组播服务器604建立业务协议的协商和建立转发表项。第二设备602和第三设备603的环网协议控制的阻塞状态切换后，第一设备601从第一路径或者第二路径接收组播服务器604下发的组播业务报文。
可选的，所述第二设备602或第三设备603接收到组播控制报文后判断所述组播控制报文是否携带有透明传输标识，如果携带有透明传输标识，则透明传输所述组播控制报文至所述组播服务器。
可选的，所述第一设备601通过第一接口和第二接口分别发送组播控制报文给第二设备602和第三设备603之前，还用于接收到组播报文后，识别出组播控制报文并对所述组播控制报文添加自定义的穿透标识。
可选的，所述第一设备602还用于复制添加了自定义穿透标识的组播控制报文得到多份组播控制报文。
可选的，所述组播控制报文通过所述第二设备602和第三设备603的端口发送至所述组播服务器604之前还包括：第二设备602将所述组播控制报文给第四设备(图中未示出)。第三设备将所述组播控制报文给第五设备(图中未示出)。其中，所述第四设备连接在所述第二设备和所述组播服务器之间，第五设备连接在所述第三设备和所述组播服务器之间。第四设备和第五设备接收到组播控制报文进一步发送给组播服务器。
如图7所示，本申请实施例提供了一种设备，该设备110包括：处理器112、通信接口113、存储器111。可选的，PE 110还可以包括总线114。其中，通信接口113、处理器112以及存储器111可以通过总线114相互连接；总线114可以是外设部件互连标准(Peripheral Component Interconnect，PCI)总线或扩展工业标准结构(Extended Industry Standard Architecture，EISA)总线等。所述总线114可以分为地址总线、数据总线、控制总线等。为便于表示，图7中仅用一条粗线表示，但并不表示仅有一根总线或一种类型的总线。
其中，存储器111用于存储可由处理器112执行的指令，处理器112用于调用存储器111中存储的指令，以执行前述路径切换过程中快速恢复业务的方法中的各步骤。
实现上述各方法实施例的全部或部分步骤可以通过程序指令相关的硬件来完成。前述的程序可以存储于一可读取存储器中。该程序在执行时，执行包括上述各方法实施例的步骤；而前述的存储器(存储介质)包括：只读存储器(Read-only Memory，ROM)、RAM、快闪存储器、硬盘、固态硬盘、磁带(magnetic tape)、软盘(floppy disk)、光盘(optical disc)及其任意组合。
以上所述，仅为本发明的具体实施方式，但本发明的保护范围并不局限于此，任何熟悉本技术领域的技术人员在本发明揭露的技术范围内，可轻易想到变化或替换，都应涵盖在本发明的保护范围之内。因此，本发明的保护范围应以所述权利要求的保护范围为准。

Claims (16)

  1. 一种路径切换过程中快速恢复业务的方法，其特征在于，包括：
    通过第一接口和第二接口分别发送组播控制报文给第二设备和第三设备，所述组播控制报文携带有透明传输标识，其中所述第二设备和第三设备中至少一个的端口处于环网协议控制的阻塞状态，其中第二设备或第三设备均连接至组播服务器，所述组播控制报文通过所述第二设备和第三设备的端口发送至所述组播服务器并与所述组播服务器建立业务协议的协商和建立转发表项；
    第二设备和第三设备的环网协议控制的阻塞状态切换后，从第一路径或者第二路径接收所述组播服务器下发的组播业务报文。
  2. 根据权利要求1所述的路径切换过程中快速恢复业务的方法，其特征在于，包括：
    所述第二设备或第三设备接收到所述组播控制报文后判断所述组播控制报文是否携带有透明传输标识，如果携带有透明传输标识，则透明传输所述组播控制报文至所述组播服务器。
  3. 根据权利要求2所述路径切换过程中快速恢复业务的方法，其特征在于，所述通过第一接口和第二接口分别发送组播控制报文给第二设备和第三设备之前还进一步包括：
    接收组播报文并识别出组播控制报文；
    对所述组播控制报文添加自定义穿透标识。
  4. 根据权利要求3所述路径切换过程中快速恢复业务的方法，其特征在于，还包括：
    复制添加了自定义穿透标识的组播控制报文得到多份组播控制报文。
  5. 根据权利要求1-4任一项所述路径切换过程中快速恢复业务的方法，其特征在于，所述组播控制报文通过所述第二设备和第三设备的端口发送至所述组播服务器之前还包括：
    所述第二设备将所述组播控制报文给第四设备；
    所述第三设备将所述组播控制报文给第五设备；
    其中，所述第四设备连接在所述第二设备和所述组播服务器之间；其中所述第五设备连接在所述第三设备和所述组播服务器之间。
  6. 一种设备，其特征在于，通过第一接口和第二接口分别与第二设备和第三设备连接，其中所述第二设备和第三设备中至少一个的端口处于环网协议控制的阻塞状态，其中第二设备或第三设备均连接至组播服务器，包括：
    发送单元，用于通过第一接口和第二接口分别发送组播控制报文给第二设备和第三设备，所述组播控制报文携带有透明传输标识，其中所述第二设备和第三设备中至少一个的端口处于环网协议控制的阻塞状态，其中第二设备或第三设备均与组播服务器连接，所述组播控制报文通过所述第二设备和第三设备的端口发送至所述组播服务器并与所述组播服务器建立业务协议的协商和建立转发表项；
    接收单元，用于所述第二设备和第三设备的环网协议控制的阻塞状态切换后，从第一路径或者第二路径接收所述组播服务器下发的组播业务报文。
  7. 根据权利要求6所述的设备，其特征在于，所述第二设备或第三设备接收到所述组播控制报文后判断所述组播控制报文是否携带有透明传输标识，如果携带有透明传输标识，则透明传输所述组播控制报文至所述组播服务器。
  8. 根据权利要求6所述的设备，其特征在于，还包括处理单元，
    所述发送单元通过第一接口和第二接口分别发送组播控制报文给第二设备和第三设备之前还进一步接收组播报文发送给所述处理单元；
    所述处理单元识别出组播控制报文并对所述组播控制报文添加自定义的穿透标识。
  9. 根据权利要求8所述的设备，其特征在于，所述处理单元还用于复制添加了自定义穿透标识的组播控制报文得到多份组播控制报文。
  10. 根据权利要求6-8任一项所述的设备，其特征在于，所述组播控制报文通过所述第二设备和第三设备的端口发送至所述组播服务器之前还包括：
    第二设备将所述组播控制报文给第四设备；第三设备将所述组播控制报文给第五设备；
    其中，所述第四设备连接在所述第二设备和所述组播服务器之间；其中所述第五设备连接在所述第三设备和所述组播服务器之间。
  11. 一种组播系统，其特征在于，包括第一设备、第二设备、第三设备和语音组播服务器，所述第一设备通过第一接口和第二接口分别与第二设备和第三设备连接，其中所述第二设备和第三设备中至少一个的端口处于环网协议控制的阻塞状态，其中第二设备或第三设备均连接至组播服务器，其中：
    所述第一设备通过第一接口和第二接口分别发送组播控制报文给第二设备和第三设备，所述组播控制报文携带有透明传输标识，其中所述第二设备和第三设备中至少一个的端口处于环网协议控制的阻塞状态，其中第二设备或第三设备均连接至组播服务器，所述组播控制报文通过所述第二设备和第三设备的端口发送至所述组播服务器并与所述组播服务器建立业务协议的协商和建立转发表项；所述第二设备和第三设备的环网协议控制的阻塞状态切换后，所述第一设备从第一路径或者第二路径接收所述组播服务器下发的组播业务报文。
  12. 根据权利要求11所述的组播系统，其特征在于，所述第二设备或第三设备接收到所述组播控制报文后判断所述组播控制报文是否携带有透明传输标识，如果携带有透明传输标识，则透明传输所述组播控制报文至所述组播服务器。
  13. 根据权利要求11所述的组播系统，其特征在于，所述第一设备通过第一接口和第二接口分别发送组播控制报文给第二设备和第三设备之前，还用于接收到组播报文后，识别出组播控制报文并对所述组播控制报文添加自定义的穿透标识。
  14. 根据权利要求13所述的组播系统，其特征在于，所述第一设备还用于复制添加了自定义穿透标识的组播控制报文得到多份组播控制报文。
  15. 根据权利要求11-14任一项所述的组播系统，其特征在于，所述组播控制报文通过所述第二设备和第三设备的端口发送至所述组播服务器之前还包括：
    第二设备将所述组播控制报文给第四设备；第三设备将所述组播控制报文给第五设备；
    其中，所述第四设备连接在所述第二设备和所述组播服务器之间；其中所述第五设 备连接在所述第三设备和所述组播服务器之间。
  16. 一种设备，其特征在于，包括：处理器、存储器、总线和通信接口；该存储器用于存储计算机执行指令，该处理器与该存储器通过该总线连接，当该设备运行时，该处理器执行该存储器存储的该计算机执行指令，以执行所述权利要求1-5任意一项的方法。
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