CN102420746A - Forwarding method for multicast flow and network equipment therefor - Google Patents

Forwarding method for multicast flow and network equipment therefor Download PDF

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Publication number
CN102420746A
CN102420746A CN 201110359074 CN201110359074A CN102420746A CN 102420746 A CN102420746 A CN 102420746A CN 201110359074 CN201110359074 CN 201110359074 CN 201110359074 A CN201110359074 A CN 201110359074A CN 102420746 A CN102420746 A CN 102420746A
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multicast
board
standby board
multicast routing
routing table
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CN 201110359074
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Chinese (zh)
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赵艳杰
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中兴通讯股份有限公司
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Publication of CN102420746A publication Critical patent/CN102420746A/en

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Abstract

The invention discloses a forwarding method for multicast flow and network equipment for multicast flow. The method comprises the following steps of: synchronizing a multicast route table entry on a main board to a spare board; switching the main board and the spare board; and forwarding the multicast flow by the spare board through the multicast route table entry synchronized to the locality. The problem that a multicast business is interrupted caused by equipment upgrade or equipment failure when main board equipment is restarted in a correlated technology can be solved, the continuity of the multicast business can be guaranteed, and the stability of the network can be improved.

Description

组播流量的转发方法及网络设备 Method for forwarding multicast traffic and network equipment

技术领域 FIELD

[0001] 本发明涉及通信领域,尤其涉及一种组播流量的转发方法及网络设备。 [0001] The present invention relates to communication field, and particularly relates to a method and a network device for forwarding multicast traffic. 背景技术 Background technique

[0002] 随着网络上部署的应用的增多,网络永续性对企业的成功变得越来越重要。 [0002] With the increase in applications deployed on the network, network resiliency to the success of the enterprise is becoming increasingly important. 无论是计划外还是计划内的网络停顿都会对业务构成负面影响。 Whether or unplanned network will pause in the program have a negative impact on the business. 为了提高网络可用性,尽可能消除计划内停顿,不中断业务升级技术应运而生。 In order to increase network availability, as far as possible to eliminate pauses in the program, without interrupting the service upgrade technology came into being. 该技术可以最大限度地缩短设备升级期间业务中断的时间,甚至可以完全不中断业务进行升级。 The technology can minimize business disruption during the upgrade device time, or even completely without interrupting the service upgrade.

[0003] 在分布式系统设备升级期间,单播路由协议(例如,开放最短路径优先(Open Shortest Path First,简称为OSPF))可以通过平滑重启功能保证单播业务不中断而且能够快速地恢复出原有的路由表项。 [0003] During distributed system equipment upgrades, unicast routing protocols (e.g., Open Shortest Path First (Open Shortest Path First, simply referred to as the OSPF)) by unicast GR function ensures uninterrupted services and can quickly recover the the existing routing table entry. 然而,由于组播路由协议(例如,协议无关组播-稀疏模式(Protocol Independent Multicast-Sparse Mode,简称为PIM-SM))不具备平滑重启功能,所以,在设备升级期间,无法满足业务流量不中断的要求。 However, since the multicast routing protocols (eg, Protocol Independent Multicast - Sparse Mode (Protocol Independent Multicast-Sparse Mode, referred to as PIM-SM)) does not have the graceful restart function, so during equipment upgrades, traffic does not meet interrupt request.

[0004] 针对相关技术中设备升级或故障而导致的主板设备重启期间组播业务中断的问题,目前尚未提出有效的解决方案。 [0004] problems in the related art equipment upgrades or malfunction caused during the restart motherboard devices multicast service interruption, has not yet come up with effective solutions.

发明内容 SUMMARY

[0005] 本发明的主要目的在于提供一种组播流量的转发方案,以至少解决上述相关技术中设备升级或故障而导致的主板设备重启期间组播业务中断的问题。 [0005] The main object of the present invention is to provide multicast traffic forwarding scheme, at least solve the above problems in the related art equipment upgrades or device failure caused board multicast service interruption during the restart.

[0006] 为了实现上述目的,根据本发明的一个方面,提供了一种组播流量的转发方法。 [0006] To achieve the above object, according to one aspect of the invention there is provided a method for forwarding multicast traffic.

[0007] 根据本发明的组播流量的转发方法,包括以下步骤:将主板上的组播路由表项同步到备板;倒换主板与备板;备板使用同步到本地的组播路由表项进行组播流量的转发。 [0007] The multicast traffic forwarding method according to the invention, comprising the steps of: a multicast routing entries on the system board to the standby board synchronization; main board and the standby board switchover; standby board used to synchronize the local multicast routing entries forwarding multicast traffic.

[0008] 优选地,将主板上的组播路由表项同步到备板包括:将主板根据协议层更新后的组播路由表项实时同步至备板;或者,在主板中的组播路由表项有变化的情况下,将变化的组播路由表项同步到备板。 [0008] Preferably, the multicast routing entries on the system board to the standby board synchronization comprising: a motherboard according to the multicast routing table entry updates the real-time synchronization protocol layers to the standby board; or, in the board in the multicast routing table the item has changed, the change in the synchronization multicast routing entries to the standby board.

[0009] 优选地,将主板上的组播路由表项同步到备板包括:将主板中每个路由表项的信息同步到备板,其中,信息包括组播组地址、源地址和出接口列表;备板根据信息创建、更新或删除相应的组播路由表项。 [0009] Preferably, the multicast routing entries on the system board to the standby board synchronization comprising: a motherboard routing table entry information for each synchronized to the standby board, wherein the information includes a multicast group address, the source address and outbound interface list; standby board according to the information to create, update or delete the corresponding routing table entries.

[0010] 优选地,备板根据信息创建、更新或删除相应的组播路由表项包括:在确定备板本地没有信息的情况下,在备板中创建相应的组播路由表项,并记录该组播路由表项的出接口列表;在确定备板本地已存在信息的情况下,判断信息在备板与主板中分别对应的组播路由表项是否一致,若不一致,则更新备板中信息对应的组播路由表项。 [0010] Preferably, the standby board according to the information to create, update or delete the corresponding routing table entry comprises: determining the standby board in a case where no local information, creates a corresponding entry in the multicast routing table in the standby board, and recorded the outgoing interface list of multicast routing entries; standby board is determined in the case of local information already exists, it is determined whether or not information on standby board and the motherboard respectively corresponding to the same multicast routing entries, and if not, updates the standby board information corresponding to the multicast routing table entries.

[0011] 优选地,更新备板中信息对应的组播路由表项包括:备板查找本地保存的与信息对应的组播路由表项,删除查找到的该组播路由表项的出接口列表,根据信息更新该出接口列表。 [0011] Preferably, the update information corresponding to the standby board in the multicast routing table entry includes: a standby board to find a locally stored information corresponding to the multicast routing table entries, delete the list to find the interface to the multicast routing table entry according to the updated information to the interface list.

[0012] 优选地,倒换主板与备板之后,该方法还包括:备板作为当前主板重建协议层信息时,根据协议层信息创建或更新本地的组播路由表项。 After [0012] Preferably, the main board and the standby board switchover, the method further comprising: a standby board Board reconstructed as the current protocol layer information, the protocol layer information created or updated local multicast routing entries in accordance with.

[0013] 优选地,根据协议层信息更新本地的组播路由表项包括:备板取本地的组播路由表项的出接口列表与协议层信息中该组播路由表项的出接口列表的并集作为更新后的本地的组播路由表项的出接口列表;和/或,备板确定本地的组播路由表项中与协议层信息对应的组播路由表项,并在预定时间后删除本地的组播路由表项中除确定的与协议层信息对应的组播路由表项之外的其他组播路由表项。 [0013] Preferably, according to the protocol layer information to update the local routing entry comprising: a standby board takes local outgoing interface list of multicast routing protocol layer information entries in the outgoing interface list of multicast routing table entry, and sets as the local outgoing interface list of multicast routing entries updated; and / or determining the local standby board multicast routing table entry corresponding to the protocol layer information and multicast routing entries, and remove after a predetermined time local multicast routing table entry other multicast routing entries other than the determined protocol layer information corresponding to the multicast routing table entry.

[0014] 为了实现上述目的,根据本发明的另一方面,提供了一种网络设备。 [0014] To achieve the above object, according to another aspect of the present invention, there is provided a network device.

[0015] 根据本发明的网络设备,包括:同步模块,用于将主板上的组播路由表项同步到备板;倒换模块,用于倒换主板与备板;转发模块,用于备板使用同步到本地的组播路由表项进行组播流量的转发。 [0015] The network apparatus according to the present invention, comprising: a synchronization module for multicast routing entries on the system board to the standby board synchronization; switching means for switching the main board and the standby board; forwarding module, used for standby board synchronized to the local multicast routing table entry for forwarding multicast traffic.

[0016] 优选地,同步模块还用于将主板根据协议层更新后的组播路由表项实时同步至备板;或者,在主板中的组播路由表项有变化的情况下,将变化的组播路由表项同步到备板。 [0016] Preferably, the synchronization module is further configured to motherboard standby board according to the protocol layer routing entry update to the real-time synchronization; Alternatively, the entry in the multicast routing table board in the case where there is a change, the change multicast routing entries synchronized to the standby board.

[0017] 优选地,该方法还包括:重建模块,用于备板作为当前主板重建协议层信息时,根据协议层信息创建或更新本地的组播路由表项。 [0017] Preferably, the method further comprising: a reconstruction module configured to reconstruct the standby board Board as protocol information of the current layer, protocol layer multicast routing entries created or updated information based on local.

[0018] 通过本发明,采用将主板上的组播路由表项同步到备板,主备倒换后,使用同步到当前主板的组播路由表项进行组播流量的转发的方式,解决了相关技术中设备升级或故障而导致的主板设备重启期间组播业务中断的问题,保证了组播业务的连续性,提高了网络的稳定性。 [0018] By the present invention, a multicast routing entries on the system board to the standby board synchronization, After the switchover, the current synchronous motherboard routing entry for forwarding multicast traffic in a manner to solve the related during the restart problem motherboard devices multicast service interruption in equipment upgrades or technical failure caused, to ensure the continuity of the multicast service, improve the stability of the network.

附图说明 BRIEF DESCRIPTION

[0019] 此处所说明的附图用来提供对本发明的进一步理解,构成本申请的一部分,本发明的示意性实施例及其说明用于解释本发明,并不构成对本发明的不当限定。 [0019] The drawings described herein are provided for further understanding of the present invention, constitute a part of this application, exemplary embodiments of the present invention are used to explain the present invention without unduly limiting the present invention. 在附图中: In the drawings:

[0020] 图1是根据本发明实施例的组播流量的转发方法的流程图; [0020] FIG. 1 is a flowchart of a method for forwarding multicast traffic according to an embodiment of the present invention;

[0021] 图2是根据本发明实施例的网络设备的结构框图; [0021] FIG. 2 is a block diagram of a network device according to an embodiment of the present invention;

[0022] 图3是根据本发明优选实施例的网络设备的结构框图; [0022] FIG. 3 is a block diagram of a network device according to a preferred embodiment of the present invention;

[0023] 图4是本发明实施例二的实现组播流量不中断的转发方法的流程图; [0023] FIG. 4 is a flowchart of a method for forwarding multicast traffic according to the second embodiment of the present invention without interruption;

[0024] 图5是本发明实施例二的备板上组播路由表项处理的流程图; [0024] FIG. 5 is a flowchart of the multicast routing table entry standby board according to a second embodiment of the process of the present invention;

[0025] 图6是本发明实施例二的主备倒换后新主板上路由表项处理的流程图; [0025] FIG. 6 is a flowchart of embodiments of the present invention by a treatment after the primary table entry according to the second switchover new motherboard road;

[0026] 图7是本发明实施例三的组播流量不中断转发组网的示意图。 [0026] FIG. 7 is a schematic diagram of multicast traffic forwarded according to a third uninterrupted network of the present invention.

具体实施方式 Detailed ways

[0027] 下文中将参考附图并结合实施例来详细说明本发明。 [0027] Hereinafter with reference to the accompanying drawings and embodiments of the present invention will be described in detail. 需要说明的是,在不冲突的情况下,本申请中的实施例及实施例中的特征可以相互组合。 Incidentally, in the case of no conflict, embodiments and features of the embodiments of the present application can be combined with each other.

[0028] 根据本发明实施例,提供了一种组播流量的转发方法。 [0028] According to an embodiment of the present invention, there is provided a method for forwarding multicast traffic. 图1是根据本发明实施例的组播流量的转发方法的流程图,如图1所示,该方法包括以下步骤: FIG 1 is a flowchart of a method of multicast traffic forwarded to an embodiment of the present invention, shown in Figure 1, the method comprising the steps of:

[0029] 步骤S102,将主板上的组播路由表项同步到备板; [0029] step S102, multicast routing entries on the system board to the standby board synchronization;

[0030] 步骤S104,倒换主板与备板; [0030] Step S104, the main board and the standby board switchover;

[0031] 步骤S106,备板使用同步到本地的组播路由表项进行组播流量的转发。 [0031] step S106, the standby board used to synchronize the local routing entry for forwarding multicast traffic.

[0032] 通过上述步骤,采用将主板上的组播路由表项同步到备板,主备倒换后,使用同步 [0032] Through the above steps, the use of multicast routing entries on the system board to the standby board synchronization, After the switchover, synchronous

5到当前主板的组播路由表项进行组播流量的转发的方式,解决了相关技术中设备升级或故障而导致的主板设备重启期间组播业务中断的问题,保证了组播业务的连续性,提高了网络的稳定性。 5 ways to the current board routing entry and forwards multicast traffic to solve the related art equipment upgrades or failures caused by problems during the motherboard devices restart multicast service interruption, ensuring the continuity of the multicast service to improve the stability of the network.

[0033] 例如,步骤S102中的组播路由表项为分布式系统中待升级设备的组播转发表项信息,其中,这里的组播转发表项信息是三层IP信息,如组播组地址、源地址等。 [0033] For example, in step S102, multicast routing table entry as a distributed system to be upgraded equipment multicast forwarding entry information, wherein the multicast forwarding entries here are three IP information, such as multicast group address, source address.

[0034] 优选地,在步骤S102中,将主板根据协议层更新后的组播路由表项实时同步至备板;或者,在主板中的组播路由表项有变化的情况下,将变化的组播路由表项同步到备板。 [0034] Preferably, in step S102, the real-time synchronization system board to the standby board based on the multicast routing table entry updates the protocol layer; lower or multicast routing entries in the board in the case where there is a change, the change multicast routing entries synchronized to the standby board. 在实施过程中,可以设置定时器,周期性地将主板中的组播路由表项同步至备板,也可以由事件触发,即当主板中的组播路由表项根据协议层更新时有变化,则将有变化的主板中的组播路由表项同步至备板中。 In implementation, a timer may be provided periodically motherboard multicast routing entries in synchronization to the standby board, may be triggered by an event, that is, when the motherboard in the multicast routing table has entries updated protocol layer varies with the time , there will be a change in the multicast routing table entry is synchronized to the system board in the standby board. 该方法可以增加系统的灵活性。 This method can increase the flexibility of the system.

[0035] 优选地,在步骤S102中,将主板中每个路由表项的信息同步到备板,其中,该信息包括组播组地址、源地址和出接口列表;备板根据该信息创建、更新或删除相应的组播路由表项。 [0035] Preferably, in the step S102, the information of each routing table entry system board to the standby board synchronization, wherein the information comprises multicast group address, source address, and an interface list; standby board based on the information created, update or delete the corresponding routing table entries. 该方法将创建组播路由表项的基本信息,例如,组播组地址、源地址和出接口列表等均发送至备板,用于备板创建或更新相应的组播路由表项,提高了系统的有效性。 The basic method of the multicast routing table entry created, e.g., multicast group address, the source address and sent to the outgoing interface list, etc standby board, the standby board is used to create or update a corresponding routing entry, improved effectiveness of the system.

[0036] 优选地,在步骤S102中,备板根据该信息创建、更新或删除相应的组播路由表项包括:在确定备板本地没有该信息的情况下,在备板中创建相应的组播路由表项,并记录该组播路由表项的出接口列表;在确定备板本地已存在该信息的情况下,判断该信息在备板与主板中分别对应的组播路由表项是否一致,若不一致,则更新备板中该信息对应的组播路由表项。 [0036] Preferably, in the step S102, the standby board based on the information to create, update or delete the corresponding routing table entry comprises: determining the backup board in a case where information is not available locally, create a corresponding group in the standby board multicast routing table, and records the multicast routing outgoing interface list entry; in the case of determining that the local standby board information already exists, it is determined whether the information in the standby board and the motherboard respectively corresponding to the same multicast routing entries If not, the standby board update information corresponding to the multicast routing table entries. 该方法可以提高系统的处理能力。 This method can improve the system capacity.

[0037] 在步骤S102中,备板也可以根据从主板同步过来的路由表项信息删除相应的组播路由表项。 [0037] In step S102, the standby board may delete the routing entry from the routing table entry information synchronized from the motherboard. 例如,比较从主板同步过来的路由表项与本地保存的路由表项,删除本地保存的但不在同步过来的主板中的路由表项。 For example, compare the synchronization from the motherboard over the preservation of the routing table entry in the local routing table entries, delete synchronized from the board but not in the routing table entries stored locally.

[0038] 优选地,在步骤S102同步时,更新备板中该信息对应的组播路由表项包括:备板查找本地保存的与该信息对应的组播路由表项,删除查找到的该组播路由表项的出接口列表,根据该信息更新该出接口列表。 [0038] Preferably, at synchronization step S102, the standby board update information corresponding to the multicast routing table entry comprises: a standby board to find a locally stored information corresponding to the multicast routing table entry, to find the set of deleted multicast routing table entries outgoing interface list, according to the information to update the outgoing interface list. 该方法实现简单、可操作性强。 The method is simple, easy to operate.

[0039] 优选地,在步骤S104之后,备板作为当前主板重建协议层信息时,根据协议层信息创建或更新本地的组播路由表项。 When [0039] Preferably, after step S104, the standby board Board reconstructed as the current protocol layer information, according to the protocol layer information created or updated local multicast routing entries. 该方法可以快速恢复出倒换前的组播业务,提高了组播路由表项的有效性和准确性。 This method can quickly recover the multicast service before switching to improve the effectiveness and accuracy of multicast routing entries.

[0040] 优选地,在步骤S104之后,根据协议层信息更新本地的组播路由表项包括:备板取本地的组播路由表项的出接口列表与协议层信息中该组播路由表项的出接口列表的并集作为更新后的本地的组播路由表项的出接口列表;和/或,备板确定本地的组播路由表项中与协议层信息对应的组播路由表项,并在预定时间后(即,平滑期后)删除本地的组播路由表项中除确定的与协议层信息对应的组播路由表项之外的其他组播路由表项。 [0040] Preferably, after step S104, the updated information according to the local protocol layer multicast routing table entry comprises: a standby board takes local outgoing interface list of multicast routing protocol layer information entries in the multicast routing table entries the outgoing interface list and set as the local outgoing interface list of multicast routing entries updated; and / or determining the local standby board multicast routing table entry corresponding to the protocol layer information and multicast routing entries, and after a predetermined time (i.e., the smoothed period) delete the local multicast routing table entry other multicast routing entries other than the determined protocol layer information corresponding to the multicast routing table entry. 该方法简单实用、可操作性强。 The method is simple and practical, easy to operate. 需要说明的是,备板(新主板)更新本地的组播路由表项时,可以在平滑期定时器(即,一个预定时间)结束后,才删除本地的组播路由表项中除确定的与协议层信息对应的组播路由表项之外的其他组播路由表项。 Incidentally, when the standby board (motherboard new) to update the local routing entry, the timer period may be smooth (i.e., a predetermined time) after, before deleting the local multicast routing table entry is determined in addition to protocol layer than the information corresponding to the multicast routing table entries other multicast routing entries.

[0041] 对应于上述方法,还提供了一种网络设备。 [0041] correspond to the above method, a network device is also provided. 图2是根据本发明实施例的网络设备的结构框图,如图2所示,该网络设备20包括:同步模块22,用于将主板上的组播路由表项同步到备板;倒换模块对,用于倒换主板与备板;转发模块沈,耦合至同步模块22和倒换模块对,用于备板使用同步到本地的组播路由表项进行组播流量的转发。 FIG 2 is a block diagram of a network device according to the present embodiment of the invention, shown in Figure 2, the network device 20 includes: a synchronization module 22, the multicast routing table entries for the board to the standby board synchronization; switching module , for switching the standby board and the motherboard; Shen forwarding module, coupled to the synchronization module 22 and a switching module, the standby board for multicast using synchronized to the local routing table entry to forward multicast traffic.

[0042] 通过网络设备20,同步模块22将主板上的组播路由表项同步到备板,主备倒换后,转发模块26使用同步到当前主板的组播路由表项进行组播流量的转发,解决了相关技术中设备升级或故障而导致的主板设备重启期间组播业务中断的问题,保证了组播业务的连续性,提高了网络的稳定性。 [0042] 20, the synchronization module 22 forwards the multicast routing entries on the system board to the standby board synchronization, After the switchover, the forwarding module 26 using synchronized to the current routing entry board for multicast traffic through the network device , problem-solving techniques related equipment upgrades or malfunction caused during the restart motherboard devices multicast service interruption, ensuring the continuity of the multicast service, improve the stability of the network.

[0043] 优选地,同步模块22还用于将主板根据协议层更新后的组播路由表项实时同步至备板;或者,在主板中的组播路由表项有变化的情况下,将变化的组播路由表项同步到备板。 [0043] Preferably, the synchronization module 22 is further configured to motherboard standby board according to the protocol layer routing entry update to the real-time synchronization; or in the case, in the multicast routing table entry there is a change in the motherboard, will vary multicast routing entries synchronized to the standby board.

[0044] 图3是根据本发明优选实施例的网络设备的结构框图,如图3所示,该网络设备20 还包括:重建模块32,耦合至同步模块22、倒换模块M和转发模块沈,用于备板作为当前主板重建协议层信息时,根据协议层信息创建或更新本地的组播路由表项。 [0044] FIG. 3 is a block diagram of a network device according to a preferred embodiment of the present invention, shown in Figure 3, the network apparatus 20 further comprising: a reconstruction module 32, 22 is coupled to a synchronization module, a forwarding module and a switching module M Shen, the standby board is used as a protocol layer information reconstructed current motherboard, according to the protocol layer information created or updated local multicast routing entries.

[0045] 下面结合优选实施例和附图对上述实施例的实现过程进行详细说明。 [0045] The following embodiments and in conjunction with the accompanying drawings of the preferred embodiment implementation process of the embodiments described above will be described in detail.

[0046] 实施例一 [0046] Example a

[0047] 本实施例提供了一种组播流量的转发方法,使得分布式系统在设备升级或因故障导致主板设备重启期间,可以保证组播业务的不中断。 [0047] The present embodiment provides a method for forwarding multicast traffic, such equipment upgrades in a distributed system or due to failure cause motherboard devices during the restart, the multicast service can ensure uninterrupted.

[0048] 在实施过程中,首先,可以将待升级设备主板上组播路由支撑模块针对每个路由表项的重要信息同步到备板,然后,根据该重要信息在备板上保存一份与主板相一致的组播路由表项,这样,设备升级前正常流量的转发由主板维护,设备升级进行主备板倒换后, 由备板继续维持流量的转发而不会产生业务中断。 [0048] In the embodiment process, first, the multicast routing can be on the support module to the main board important information for synchronizing the standby board routing table entry for each upgrade, and then, based on the important information to keep a standby board and board consistent routing entry, so that, before the forward traffic by the motherboard upgrade and maintenance equipment, equipment upgrades AMB after switchover, the standby board forward continuation of the flow rate without causing service interruption. 其中,主板同步到备板的重要信息可以包括:组播组地址、源地址、转发索引号以及该路由表项对应的出接口列表。 Wherein the main board to the standby board synchronization Important information may include: a multicast group address, source address, and the forwarding index entry is associated outgoing interface list.

[0049] 优选地,将主板上针对每个路由表项对应的重要信息同步到备板可以包括两个过程:实时同步和变化同步。 [0049] Preferably, the critical information on the motherboard for each routing table entry corresponding to the synchronization to the standby board may include two processes: synchronization and real time synchronization changes. 其中,实时同步可以是主板中的支撑模块将主板中的协议模块同步过来的组播路由表项立即同步到备板;变化同步可以是一旦主板中的支撑模块的组播路由表项发生变化就立即同步到备板。 Wherein the real-time synchronization may be a module board in the supporting board in the synchronization protocol module over the multicast routing entries immediately synchronized to the standby board; synchronization may change once the multicast routing entries in the motherboard support module changes to immediately synchronized to the standby board. 通过这两个过程即可保证主备板上的组播路由表项实时一致。 By these two processes can ensure the standby board multicast routing entries in real time consistent.

[0050] 进一步地,备板收到主板同步过来的信息后,可以根据这些信息创建出相应的组播路由表项。 After [0050] Further, the standby board synchronization information received over the motherboard to create the corresponding routing entry based on this information. 备板创建出组播路由表项后,可以对每一组播路由表项设置老化标记位,并将该表项对应的老化标记位置位,以表明当前的组播路由表项是由主板同步过来的。 After the standby board to create multicast routing table entry, the aging flag can be set for each multicast routing entries, and the entry corresponding to the aging flag bit to indicate the current multicast routing entries are synchronized by the motherboard over. 其中,老化标记位可以是在备板上创建的。 Wherein, the aging flag can be created in the standby board.

[0051] 优选地,在主备板倒换后可以创建一个平滑定时器,用来平滑处理这个倒换过程。 [0051] Preferably, the timer can create a smooth switchover in the AMB, for smoothing the switching process. 例如,在平滑期间,如果备板(即,新主板)中的组播路由支撑模块再次收到备板中的协议模块同步过来的对应表项,就会将上述的老化标记位复位,标记该组播路由表项得到恢复。 For example, during the smoothing, if the standby board (i.e., the new motherboard) of the support module again received multicast routing table entry corresponding to the standby board synchronization protocol module over, it will be the above-described aging flag is reset, the flag multicast routing table entries to be restored. 在平滑定时器到期后,遍历所有的组播路由表项,查看其对应的老化标记位是否置位,如果置位,则表明在平滑期间该组播路由表项没有得到恢复,将该表项删除。 After the expiration of the timer smoothing through all multicast routing entries to see if the corresponding flag bit in aging, if set, indicates that the multicast routing table entry is not recovered during the smoothing, the table item deleted.

[0052] 优选地,主备板倒换后,在备板(新主板)支撑模块接收到协议模块同步下来的组播路由条目后,且当前处于平滑处理期时,会对本地保存的出接口列表做一个融合操作。 When [0052] Preferably, the rear plate standby switchover, the standby board (motherboard new) support module after receiving the multicast routing protocol module entries synchronized down, and the current in the smoothing processing of, will save list of the local interface doing a fusion operation. 该融合操作可以具体为:备板(新主板)中的支撑模块将备板中协议模块同步过来的路由表项带的出接口与本地保存的路由表项中的出接口进行比较,取两者的并集合作为最终的路由表项的出接口列表。 The fusion operation may be: a standby board (motherboard new) is stored in the support module interface to a protocol module in the standby board synchronized from the routing table entries with routing table entries, the interface comparing, whichever and a set of interfaces as the final list of routing entries. 这样就可以使得原有的组播流量不会中断,同时还允许新增用户。 This will make the original multicast traffic will not be interrupted, while also allowing new users.

7[0053] 需要说明的是,在主板和备板中均有组播路由支撑模块和协议模块,S卩,在倒换之前,是使用主板中的支撑模块和协议模块进行三层IP信息的更新,在倒换之后,是使用备板(新主板)中的支撑模块和协议模块,进行三层IP信息的更新。 7 [0053] Incidentally, in the board and the standby board in both the multicast routing protocol module and a support module, S Jie, before the switching, using the support module and a motherboard module update Layer IP protocol information , after switching, the use of standby board (motherboard new) in the support module and the protocol module updates IP Layer information.

[0054] 与现有技术相比较,本实施例采用了组播热备份功能,可以在分布式系统设备升级或因故障导致主板设备重启期间,使得组播业务流量不中断转发,保证了网络的永续性, 满足电信级50ms不中断业务需求。 [0054] Compared with the prior art, the present embodiment employs a multicast hot backup, a distributed system may be due to failure or lead to equipment upgrades during reboot motherboard, such that forwarding of multicast traffic is not interrupted, to ensure that the network is in resiliency to meet carrier-grade 50ms without interrupting business needs.

[0055] 实施例二 [0055] Second Embodiment

[0056] 本实施例提供了一种组播流量不中断的实现方法,备板上存在与主板对应的组播路由表项,可以使得设备升级前原有的组播流量正常转发,解决了现有技术中分布式系统在设备升级或因故障导致主板设备重启期间无法保证组播业务中断的问题。 [0056] The present embodiment provides a method for implementing multicast traffic is not interrupted, the presence of the standby board and the motherboard corresponding multicast routing entries can be made before the original multicast traffic forwarded equipment upgrades, solves distributed systems technology or equipment upgrades due to failure cause can not guarantee that problems multicast service interruption during the restart motherboard devices. 具体地,本实施例将升级前主板上创建的组播路由表项实时同步到备板保存下来,使得主备板倒换后, 由备板负责控制流量转发,这样就可以实现分布式系统设备在升级或因故障导致主板设备重启期间组播业务的不中断。 In particular, the present embodiment will be multicast routing entries created before the upgrade in real time on the system board to the standby board synchronization preserved, so that after the switching AMB, the standby board controls the traffic forwarding, this can be achieved in a distributed system equipment during the upgrade or because of failure resulting in the motherboard reboot multicast service is not interrupted.

[0057] 图4是本发明实施例二的实现组播流量不中断的转发方法的流程图,如图4所示, 该方法可以包括如下步骤: [0057] FIG. 4 is a flowchart of a method for forwarding multicast traffic according to the second embodiment of the present invention without interruption, shown in Figure 4, the method may include the steps of:

[0058] 步骤S401,在设备升级前,开启组播热备份功能。 [0058] step S401, the apparatus before the upgrade, open multicast hot backup.

[0059] 步骤S402,组播热备份功能开启后,待升级设备主板组播支撑模块将协议模块同步过来的组播路由表项中的重要信息实时同步到备板。 [0059] step S402, the hot backup multicast enabled, the main board to be upgraded to support a multicast protocol module module important information synchronized from the multicast routing table entry in real-time synchronization to the standby board. 其中,这些信息包括:组播组地址、 源地址、转发索引号以及该路由表项对应的出接口列表。 Wherein the information includes: a multicast group address, source address, and the forwarding index entry is associated outgoing interface list.

[0060] 步骤S403,备板收到主板同步过来的信息后创建、更新或删除与主板对应的组播路由表项。 After the [0060] step S403, the standby board synchronization information received over the motherboard to create, update, or delete the motherboard corresponding multicast routing entries.

[0061] 步骤S404,主备板倒换后,备板(新主板)根据同步过来的组播路由表项维持正常流量的转发。 [0061] step S404, the rear plate standby switchover, the standby board (new motherboard) to maintain the synchronization based on forward traffic over the multicast routing entries.

[0062] 图5是本发明实施例二的备板上组播路由表项处理的流程图,如图5所示,具体操作过程可以包括如下步骤: [0062] FIG. 5 is a flowchart of the multicast routing table entry standby board processing according to the second embodiment of the present invention, shown in Figure 5, the specific operation may include the following steps:

[0063] 步骤S501,备板收到主板同步过来的信息后,判断是添加、更新还是删除组播路由表项操作。 After the [0063] step S501, the standby board synchronization information received over the motherboard, it is determined to add, update or delete operation multicast routing entries.

[0064] 步骤S502,如果是添加操作,备板根据组播组地址、源地址创建出组播路由表项, 转步骤S503。 [0064] step S502, if the add operation, the standby board to create multicast routing entries based on the multicast group address, source address, proceed to step S503.

[0065] 步骤S503,将该表项对应的老化标记位置位,同时记录下对应的出接口列表。 [0065] step S503, the aging flag bit corresponding to the entry, while the record corresponding to the outgoing interface list. 其中,老化标记位可以是在备板上创建的。 Wherein, the aging flag can be created in the standby board.

[0066] 步骤S504,如果是更新操作,根据组播组地址和源地址查找到具体的组播路由表项,然后,删除原来记录的出接口列表,重新记录下新同步过来的出接口列表。 [0066] step S504, if the operation is an update, according to the multicast group address and look for a source address to a specific multicast routing table entry, and then delete the original record interface list, the re-recorded over the synchronization list of the new interface.

[0067] 步骤S505,如果是删除操作,根据组播组地址和源地址查找到具体的组播路由表项,删除对应的组播路由表项。 [0067] step S505, if the delete operation, according to the multicast group address and look for a source address to a specific multicast routing entries, delete the corresponding multicast routing entries.

[0068] 稳定情况下,备板上保存了与主板对应的所有组播路由表项。 [0068] Under steady circumstances, the standby board holds all the multicast routing table entry corresponding to the motherboard.

[0069] 当设备升级进行主备板倒换后,备板(新主板)进入平滑处理期。 [0069] When the AMB switching equipment upgrades, standby board (motherboard new) into the smoothing period. 图6是本发明实施例二的主备倒换后新主板上路由表项处理的流程图,如图6所示,进入平滑期后新主板的具体操作流程可以包括如下步骤:[0070] 步骤S601,创建一个平滑定时器,进入平滑处理期。 FIG 6 is a main embodiment of the present invention according to a second post switchover new motherboard road entry processing flowchart shown in FIG. 6, a new motherboard into the smoothing of the concrete operational procedures may include the steps of: [0070] Step S601 create a smooth timer, enter the smoothing period.

[0071] 步骤S602,支撑模块收到协议模块同步下来的组播路由表项后,判断当前是否处于平滑期,如果不是,转步骤S606 ;如果是,转步骤S603。 After the [0071] step S602, the support module receives a multicast routing entries down synchronization protocol module, determine whether the current period is smooth, if not, proceed to step S606; if yes, proceed to step S603.

[0072] 步骤S603,根据同步下来的组播组地址和源地址查找本地是否存在对应组播路由表项,如果不存在,转步骤S606,如果存在,转步骤S604。 [0072] step S603, the presence or absence of the corresponding local multicast routing entries down the synchronization multicast group address and source address look, if not, turn step S606, the, if present, proceed to step S604.

[0073] 步骤S604,判断当前的操作是添加、更新还是删除,如果是添加或更新,转步骤S605,如果是删除,结束此次处理流程。 [0073] step S604, the current operation is judged add, update or delete if it is added or updated, go to step S605, if it is removed, the end of the process flow.

[0074] 步骤S605,将老化标记位复位,同时将同步下来的组播路由表项中的出接口列表和本地保存的出接口列表进行融合操作,取并集合作为最终的转发出接口列表。 [0074] step S605, the aging flag bit is reset, while the outgoing interface list and local synchronization down the multicast routing table entry stored in the outgoing interface list fusion operation, and taken as the final set of forwarding outbound interface list.

[0075] 步骤S606,原有正常的添加、更新或删除处理操作。 [0075] step S606, the original normal add, update, or delete operation process.

[0076] 在平滑定时器到期后,新主板遍历当前保存的所有的组播路由表项,将老化标记位仍然置位的组播路由表项删除。 All multicast routing table entries [0076] After smoothing the timer expires, a new motherboard to traverse the currently saved, the aging multicast routing table entries deleted flag is still set in. 结束平滑期,所有组播路由表项平滑恢复。 The end of the smoothing period, all multicast routing entries smooth recovery.

[0077] 实施例三 [0077] Example three

[0078] 下面以图7的组网拓扑环境为例来说明分布式系统设备在升级或因故障导致主板设备重启过程期间,组播业务流量不中断转发的实现过程。 [0078] The following environment to network topology diagram of an example to illustrate 7 devices in a distributed system upgrade or because of equipment failure resulting board during the restart process, multicast traffic without interrupting the implementation process forward.

[0079] 图7是本发明实施例三的组播流量不中断转发组网的示意图,如图7所示,三层网络设备A、B、C均是支持某种组播路由协议(比如,协议无关组播-稀疏模式PIM-SM)的分布式设备,设备A在本例中作为待升级设备,其在升级前,仅存在用户1,通过端口1接收组播流量,例如,组播组地址为225. 0. 0. 1,源地址为10. 46. 70. 10。 [0079] FIG. 7 is a schematic diagram of multicast traffic forwarded according to a third network is not interrupted, as shown in FIG. 7, the layer 3 network devices A, B, C are support a multicast routing protocol (such as the present invention, protocol independent multicast - sparse mode PIM-SM) is a distributed device, apparatus a in this embodiment as a device to be upgraded, which before the upgrade, only the presence of a user, receives multicast traffic through the port 1, e.g., multicast group address 225. 0. 0. 1, a source address 10. 46. 70.10.

[0080] 升级前正常转发情况下,设备A的主板将组播组地址225. 0. 0. 1对应的组播路由表项同步到备板,备板根据收到的组播组地址225. 0. 0. 1和源地址10. 46. 70. 10创建出相应的组播路由表项,同时置位老化标记位并记录下对应的出接口列表端口1。 The [0080] forwarded before the upgrade, the apparatus A motherboard multicast group address 225. 0. 0. 1 corresponds multicast routing entries synchronized to the standby board, the standby board receives the multicast group address 225 in accordance with. 0. 0. 1 and 10. 46. 70.10 source address to create the corresponding routing table entries, while the aging flag is set and record the corresponding port interface list 1.

[0081] 然后,将设备A进行升级,主备发生倒换。 [0081] Then, the apparatus A upgrade standby switching occurs. 倒换后,由于原有的组播路由表项已经在备板上作了备份,所以,不影响原有组播业务的转发,即,用户1在设备A升级期间,一直可以收到组播流量。 After the switchover, due to the existing multicast routing table entries have been backed up in preparation board, it does not affect the original multicast forwarding business, that is, the user device A 1 during the upgrade, has been able to receive multicast traffic .

[0082] 特别地,若在倒换后的平滑期间内,在三层网络设备C上新增加了一个用户2,则备板(新主板)支撑模块在收到协议模块同步下来的组播路由表项后,在本地根据组播组地址225. 0. 0. 1和源地址10. 46. 70. 10查找到存在对应的组播路由表项,此时复位老化标记位,同时发现新同步下来的出接口列表中是新增加的端口2,由于端口1已经在备板(新主板)上保存下来了,在对出接口列表作融合处理后,最终的转发出接口列表中就存在两个端口,即端口1和端口2。 [0082] Particularly, when the smoothing period after switching on Layer C is newly added network device 2, a user of the standby board (motherboard new) support module receives the multicast routing table synchronization protocol module down in after entry, the local lookup 225. the multicast group address and the source address 0. 0.1 70.10 to 10. 46. a multicast routing table entry exists corresponding to the aging flag is reset at this time, at the same time find new sync down outgoing interface list of port 2 is newly added, because the port 1 has been preserved in the standby board (motherboard new), after the interface list for the fusion, the final two-port forwarding egress interface list exists , i.e., ports 1 and 2. 平滑期结束后,该组播路由表项已经平滑恢复了。 After smoothing period, the multicast routing table entry has a smooth recovery.

[0083] 可见,上述实施例通过组播热备份功能,可以满足分布式系统在设备升级或因故障导致主板设备重启期间组播业务不中断的要求。 [0083] visible, by the above-described embodiment, the multicast hot backup, upgrade equipment to meet the distributed system or due to failure during a motherboard cause reboot uninterrupted multicast service requirements.

[0084] 需要说明的是,本实施例仅以分布式系统设备为例对组播流量转发方法进行了说明,然而本发明实施例适应于任何通过主备板倒换进行升级的以太网设备。 [0084] Incidentally, the present embodiment only an example of a distributed system equipment multicast traffic forwarding methods are described, but the embodiment is adapted to upgrade any Ethernet device through the switchover AMB invention. 另外,本实施例中涉及到的组播热备份功能,并不局限于某一种组播路由协议(例如,协议无关组播-稀疏模式PIM-SM),相反所有的组播路由协议都满足,所以,只要涉及到相关组播路由协议都是属于本发明保护范围之内。 Further, this embodiment relates to a hot backup multicast present embodiment is not limited to a certain kind of multicast routing protocol (e.g., protocol independent multicast - sparse mode PIM-SM), opposite to all multicast routing protocols are met Therefore, it comes to belong to the relevant multicast routing protocol within the scope of the invention.

[0085] 综上所述,本发明实施例涉及以太网组播技术流量的转发,是一种分布式系统在设备升级或因故障导致主板设备重启期间实现组播流量不中断转发的方法,采用将主板上的组播路由表项同步到备板,主备倒换后,使用同步到当前主板的组播路由表项进行组播流量的转发的方式,保证了组播业务的连续性,提高了网络的稳定性。 [0085] In summary, embodiments relate to forward Ethernet multicast traffic to the present invention, is a distributed system or due to failure in equipment upgrades result in an uninterrupted multicast traffic forwarding method, using the motherboard during reboot the multicast routing table entry on the system board to the standby board synchronization, after the switchover, the current synchronous motherboard routing entry for forwarding multicast traffic way, to ensure the continuity of a multicast service, improved stability of the network.

[0086] 显然,本领域的技术人员应该明白,上述的本发明的各模块或各步骤可以用通用的计算装置来实现,它们可以集中在单个的计算装置上,或者分布在多个计算装置所组成的网络上,可选地,它们可以用计算装置可执行的程序代码来实现,从而可以将它们存储在存储装置中由计算装置来执行,或者将它们分别制作成各个集成电路模块,或者将它们中的多个模块或步骤制作成单个集成电路模块来实现。 [0086] Obviously, those skilled in the art should understand that the modules or steps of the present invention described above can be used general-purpose computing device, they can be integrated in a single computing device or distributed across multiple computing devices available on the Internet, optionally, they can be implemented with program codes executable by the computing device, thereby may be performed by a computing device stored in a storage device, or they are made into integrated circuit modules, or they plurality of modules or steps are manufactured into a single integrated circuit module. 这样,本发明不限制于任何特定的硬件和软件结合。 Thus, the present invention is not limited to any particular hardware and software combination.

[0087] 以上所述仅为本发明的优选实施例而已,并不用于限制本发明,对于本领域的技术人员来说,本发明可以有各种更改和变化。 [0087] The above description is only preferred embodiments of the present invention, it is not intended to limit the invention to those skilled in the art, the present invention may have various changes and variations. 凡在本发明的精神和原则之内,所作的任何修改、等同替换、改进等,均应包含在本发明的保护范围之内。 Any modification within the spirit and principle of the present invention, made, equivalent substitutions, improvements, etc., should be included within the scope of the present invention.

Claims (10)

1. 一种组播流量的转发方法,其特征在于,包括以下步骤:将主板上的组播路由表项同步到备板;倒换所述主板与所述备板;所述备板使用同步到本地的所述组播路由表项进行组播流量的转发。 1. A method for forwarding multicast traffic, characterized by comprising the steps of: a multicast routing entries on the system board to the standby board synchronization; motherboard and the switchover to the standby board; synchronous to the standby board the local multicast routing table entry to forward multicast traffic.
2.根据权利要求1所述的方法,其特征在于,将所述主板上的所述组播路由表项同步到所述备板包括:将所述主板根据协议层更新后的所述组播路由表项实时同步至所述备板;或者,在所述主板中的所述组播路由表项有变化的情况下,将变化的所述组播路由表项同步到所述备板。 2. The method according to claim 1, wherein the multicast routing table entries on the main board to the standby board synchronization comprises: the mainboard according to the multicast protocol layers to update the routing table entry in real-time to synchronize the standby board; or in the case, the entry in the multicast routing table board in the change will change the routing entry synchronized to the standby board.
3.根据权利要求1所述的方法,其特征在于,将所述主板上的所述组播路由表项同步到所述备板包括:将所述主板中每个路由表项的信息同步到所述备板,其中,所述信息包括组播组地址、 源地址和出接口列表;所述备板根据所述信息创建、更新或删除相应的组播路由表项。 3. The method according to claim 1, wherein the multicast routing table entries on the main board to the standby board synchronization comprises: the motherboard routing table entry information for each synchronized to the the standby board, wherein the information comprises multicast group address, the source address and the interface list; the standby board based on the information to create, update or delete the corresponding routing table entries.
4.根据权利要求3所述的方法,其特征在于,所述备板根据所述信息创建、更新或删除相应的组播路由表项包括:在确定所述备板本地没有所述信息的情况下,在所述备板中创建相应的组播路由表项,并记录该组播路由表项的出接口列表;在确定所述备板本地已存在所述信息的情况下,判断所述信息在所述备板与所述主板中分别对应的组播路由表项是否一致,若不一致,则更新所述备板中所述信息对应的组播路由表项。 In the case of determining the standby board of the information is not available locally: 4. The method according to claim 3, characterized in that, the standby board based on the information to create, update or delete the corresponding routing entry includes next, creating a corresponding entry in the multicast routing table in the standby board, and recording the outgoing interface list of multicast routing entries; the standby board in determining the local information already exists, it is determined the information if the corresponding routing entry consistent with the main board to the standby board, if not, the multicast routing table entry corresponding to the information of the standby board is updated.
5.根据权利要求4所述的方法,其特征在于,更新所述备板中所述信息对应的组播路由表项包括:所述备板查找本地保存的与所述信息对应的组播路由表项,删除查找到的该组播路由表项的出接口列表,根据所述信息更新该出接口列表。 5. The method as claimed in claim 4, wherein said updating the standby board information corresponding to the multicast routing table entry comprises: the standby board multicast routing lookup locally stored information corresponding to the entry, delete find the outgoing interface list of the multicast routing table entries, the outgoing interface list in accordance with the updated information.
6.根据权利要求1至5中任一项所述的方法,其特征在于,倒换所述主板与所述备板之后,还包括:所述备板作为当前主板重建协议层信息时,根据所述协议层信息创建或更新本地的所述组播路由表项。 6. The method according to any one of claims 5, characterized in that, after switching the main board and the standby board, further comprising: a standby board as a main board protocol layer information reconstructed current time, in accordance with the said protocol layer information creating or updating the local multicast routing entries.
7.根据权利要求6所述的方法,其特征在于,根据所述协议层信息更新本地的所述组播路由表项包括:所述备板取本地的所述组播路由表项的出接口列表与所述协议层信息中该组播路由表项的出接口列表的并集作为更新后的本地的所述组播路由表项的出接口列表;和/或,所述备板确定本地的所述组播路由表项中与所述协议层信息对应的组播路由表项,并在预定时间后删除本地的所述组播路由表项中除确定的与所述协议层信息对应的组播路由表项之外的其他组播路由表项。 7. The method according to claim 6, characterized in that, according to the protocol layer information to update the local routing entry comprises: the standby board of the outgoing interface list of multicast routing entries take local the protocol layer information, the outgoing interface list of multicast routing table entries and set as the updated local outgoing interface list of multicast routing entries; and / or, the standby board determines the local said multicast routing table entry corresponding to the protocol layer information of multicast routing entries, and delete the local after a predetermined time of the determined multicast routing table entry with the information corresponding to the multicast protocol layer except other than the multicast routing table entries routing table entries.
8. —种网络设备,其特征在于,包括:同步模块,用于将主板上的组播路由表项同步到备板;倒换模块,用于倒换所述主板与所述备板;转发模块,用于所述备板使用同步到本地的所述组播路由表项进行组播流量的转发。 8. - kind of network device, comprising: a synchronization module, for multicast routing entries on the system board to the standby board synchronization; switching means for switching the main board and the standby board; forwarding module, the use of the standby board for multicast routing table entry will be synchronized to the local multicast forwarding traffic.
9.根据权利要求8所述的网络设备,其特征在于,所述同步模块还用于将所述主板根据协议层更新后的所述组播路由表项实时同步至所述备板;或者,在所述主板中的所述组播路由表项有变化的情况下,将变化的所述组播路由表项同步到所述备板。 9. The network device according to claim 8, wherein the synchronization module is further configured to synchronize the main board to the standby board in real time according to the multicast routing table entry updates the protocol layer; or, in the case of the board in the multicast routing table entry there is a change, the change to the synchronous multicast routing entries to the standby board.
10.根据权利要求8或9所述的网络设备,其特征在于,还包括:重建模块,用于所述备板作为当前主板重建协议层信息时,根据所述协议层信息创建或更新本地的所述组播路由表项。 10. The network device as claimed in claim 8 or 9, characterized in that, further comprising: a reconstruction module, as for the standby board Board protocol layer information reconstructed current, creating or updating local information according to the protocol layer the multicast routing table entries.
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