CN103856403A - Message control method and apparatus - Google Patents

Message control method and apparatus Download PDF

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CN103856403A
CN103856403A CN 201210501782 CN201210501782A CN103856403A CN 103856403 A CN103856403 A CN 103856403A CN 201210501782 CN201210501782 CN 201210501782 CN 201210501782 A CN201210501782 A CN 201210501782A CN 103856403 A CN103856403 A CN 103856403A
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lsp
pe
label
client
establishing
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CN 201210501782
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CN103856403B (en )
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周鹏
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华为技术有限公司
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    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L45/00Routing or path finding of packets in data switching networks
    • H04L45/50Routing or path finding of packets in data switching networks using label swapping, e.g. multi-protocol label switch [MPLS]
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L45/00Routing or path finding of packets in data switching networks
    • H04L45/28Route fault recovery

Abstract

The embodiment of the invention provides a message control method. The method comprises: a first provider edge (PE) in a backbone carrier network determines whether a first label switch path (LSP) between a first node and the first PE in a first customer carrier is available and the first LSP uses the first node as a terminal point; and when the first LSP is determined to unavailable, the first PE sends a first notification message demonstrating that the first LSP is unavailable to a second PE in the backbone carrier, so that the second PE can stop LSP establishment with a second customer carrier conveniently. According to the scheme, unnecessary LSP establishment can be controlled; and the cost on the LSP by the system can be lowered.

Description

报文控制方法及装置 Packet control method and apparatus

技术领域 FIELD

[0001] 本发明涉及通信领域,具体涉及到一种报文控制方法及装置。 [0001] The present invention relates to communication field, and particularly relates to a method and apparatus for controlling packet.

背景技术 Background technique

[0002] 如图1所示,在现有技术中的运营商的运营商(carrier,s carrier)方案中,骨干运营商的客户设备(Customer Edge, CE)和骨干运营商的提供者边缘设备(ProviderEdge, PE)之间利用内部网关协议(Internal Gateway Protocol, IGP) +标签分发协议(Label Distribution Protocol, LDP)。 [0002] As shown, in the prior art operators operator (carrier, s carrier) embodiment, the backbone provider client device (Customer Edge, CE) and backbone operators provider edge device 1 using an interior gateway protocol (internal gateway protocol, IGP) between (ProviderEdge, PE) + label distribution protocol (label distribution protocol, LDP). 骨干运营商内部的PE间采用边界网关协议(BorderGateway Protocol,BGP)发布客户运营商的路由和标签。 PE between the internal backbone operators publish customer's routing and label operators using Border Gateway Protocol (BorderGateway Protocol, BGP). 客户运营商的PE设备,也就是图1中的客户运营商提供者边缘设备(customer provider edge,C-PE)C-PE设备为了能给其客户提供虚拟专网(Virtual Private Network, VPN)业务,需要建立一条从上游的第二客户运营商的C-PE2到下游的第一客户运营商的C-PEl的标签交换路径(LabelSwitch Path,LSP) ο PE device operator customers, i.e. customers in FIG. 1 provider edge device operators (customer provider edge, C-PE) C-PE device in order to give its customers VPN (Virtual Private Network, VPN) service need to establish a second client from the upstream carrier to the first client C-PE2 downstream carriers C-PEl label switched path (LabelSwitch path, LSP) ο

[0003] 骨干运营商的内部网络,以及客户设备CEl和骨干运营商PEl设备之间运行IGP + LDP协议。 [0003] Run IGP + LDP agreement between the backbone provider's internal network, and client devices CEl and backbone operators PEl equipment. 在PEl设备上,这两个协议都属于一个虚拟路由交换(Virtual Routingand Forwarding, VRF)。 On PEl device, these two agreements are part of a virtual routing exchange (Virtual Routingand Forwarding, VRF). 通过LDP建立起从PEl到C-PE1的LSP。 LSP from PEl to C-PE1 established by LDP. PEl上通过IGP学习到C-PEl的路由。 PEl learn the route C-PEl by IGP.

[0004] 骨干运营商PEl设备上的VRF实例里面将该VRF实例中的IGP路由引入到BGP VPN中,利用BGP把客户运营商的路由(CEl到C-PEl的路由)发布到远端骨干运营商的PE2设备。 [0004] The backbone provider VRF instance on which the IGP routing device PEl VRF instance into BGP VPN, the use of BGP route the customer operator (CEl to route C-PEl) Publish backbone operator to the distal end PE2's equipment. BGP发布私网路由时采用每路由标签方式给每个路由分配标签,把路由和给该路由分配的标签一起通过BGP发布到PE2设备。 When the private network by BGP routing label manner using each assigned to each of the routing label to the routing and the routing tag assigned by the device together with BGP and to PE2. PEl把CEl通过LDP给PEl分配的该路由的标签和PEl本地为该路由分配的标签作标签交换。 The PEl CEl exchange LDP label as labels assigned to PEl routing label and the local distribution of PEl for the route.

[0005] 在PE2上,收到PEl的VPN路由后,会把路由引入到IGP,触发LDP向上游的第二客户运营商的CE2设备分配标签,同时把分配的标签和从PEl通过BGP收到的该路由的标签做标签交换。 [0005] After On PE2, create PEl the received VPN routes, routes will be introduced into the IGP, the label allocation trigger CE2 device to the second client LDP upstream carriers, while the distribution of label and received via BGP from PEl do the routing label label switching. 最终形成一个C-PE2到C-PEl的端到端LSP。 Eventually forming a C-PE2 to C-PEl-end LSP.

[0006] 由于C-PE2需要迭代VPN业务到某隧道时,如果下游的LDP中断,上游侧的C-PE2无法感知隧道不可用,不能进行路由收敛,无法把流量切换到其他正常的隧道上,会导致业务中断。 [0006] Since the C-PE2 required iterations VPN service time to a tunnel, if the LDP downstream of the interruption, the upstream side of the C-PE2 can not perceive the tunnel is unavailable, can not route convergence, not the traffic is switched to the other normal tunnel, It will cause service interruption. 并且,当下游仅需要对小部分前缀建立LSP时,由于上游无法区分,会浪费标签和LSP资源。 And, only when the downstream portion of the smaller need to create LSP prefix, can not be distinguished due to upstream, and the LSP label will waste resources.

发明内容 SUMMARY

[0007] 本发明提供一种报文控制方法,以解决现有技术中在下游的客户运营商的提供者边缘设备无法感知上游客户运营商的路由是否可用,从而不能控制不必要的LSP建立,降低系统对LSP开销的问题。 [0007] The present invention provides a packet control method to solve the prior art are provided downstream of the operator in the customer edge device can not sense the client route upstream carriers is available, and thus can not control the establishment of LSP unnecessary, reduce the problem of the LSP system overhead.

[0008] 第一方面,本发明实施例提供了一种报文控制方法,所述方法包括: [0008] In a first aspect, the present invention provides a packet control method, the method comprising:

[0009] 骨干运营商网络中的第一PE确定第一客户运营商中的第一节点和所述第一PE之间的第一LSP是否可用,所述第一LSP以所述第一节点为终点; [0009] The backbone of the first operator network determining a first PE node LSP between the first client and the operator of the first PE is available, the first LSP to the first node end;

[0010] 当确定所述第一LSP不可用时,所述第一PE向骨干运营商中的第二PE发送表明所述第一LSP不可用的第一通知报文,以便于所述第二PE停止与第二客户运营商之间的LSP建立。 [0010] When it is determined that the first LSP is unavailable, indicate the first to the second PE PE backbone provider transmits a first LSP in the first notification message is not available, so that the second PE LSP established between the stop and the second operator customers.

[0011] 在所述第一方面的第一种可能的实现方式中,所述骨干运营商网络中的第一PE确定第一客户运营商中的第一节点和所述第一PE之间的第一LSP是否可用包括: [0011] In a first possible implementation of the first aspect, the backbone network of the operator defined between a first PE node of the first client and the operator of the first PE whether the first LSP available include:

[0012] 当所述第一PE在预定的时间内未接收到用于建立所述第一LSP的标签时,确定所述第一LSP不可用。 [0012] When the first PE does not receive the first LSP label for establishing within said predetermined time, determining that the first LSP is unavailable.

[0013] 在所述第一方面的第二种可能的实现方式中,还提供了所述第一方面的第二种可能的实现方式,所述第一通知报文包括用于表示所述第一PE未被分配用于建立所述第一LSP的标签的标识。 [0013] A second possible implementation of the first aspect, there is also provided a second aspect of the first possible implementation manner, the first notification message comprises means for indicating that the first PE is not assigned a first identifier for establishing LSP label.

[0014] 在根据所述第一方面或所述第一方面的第一种可能的实现方式或所述第一方面的第二种可能的实现方式的所述第一方面的第三种可能的实现方式中,所述第一通知报文用于通知所述第二PE避免向与所述第二PE相连的第二客户运营商中的设备分配用于建立第二LSP的标签,所述第二LSP为以所述第二客户运营商中的第二节点为起点、以所述第一节点为终点且经过所述第一LSP的LSP。 [0014] In the third aspect of the first or the second possible implementation of the first aspect or the second aspect of the first possible implementation of the first aspect possible implementations, the first notification message for notifying the second PE device is assigned to a second client to avoid operator connected to the second PE for establishing a second LSP in a label, the second two LSP to the second client node to operators as a starting point, the end point to the first node and the first LSP through the LSP.

[0015] 在根据所述第一方面的第一种可能的实现方式至所述第一方面的第三种可能的实现方式中的任意一个的所述第一方面的第四种可能的实现方式中,所述第一PE通过标签分发协议LDP接收用于建立所述第一LSP的标签。 [0015] any one of the possible implementations of the first aspect of the first aspect of the third possible implementation in accordance with a fourth a first possible implementation of the first aspect to the manner , the first PE through label distribution protocol (LDP) for establishing said first receiving LSP label.

[0016] 在根据所述第一方面的第一种可能的实现方式至所述第一方面的第三种可能的实现方式中任意一个的所述第一方面的第五种可能的实现方式中,当确定所述第一LSP不可用时,所述第一PE向骨干运营商中的第二PE发送所述第一LSP不可用的第一通知报文,具体包括: [0016] In a first possible implementation manner of the first aspect to the third aspect of the first possible implementation of any one of said fifth possible implementation of the first aspect , when it is determined that the first LSP is unavailable, the first PE backbone provider sends the second PE of the first LSP first notification packet unavailable, comprises:

[0017] 所述第一PE将所述第一LSP对应的路由引入到边界网关协议BGP,以所述BGP的属性标识所述第一客户运营商没有给所述第一PE分配用于建立所述第一LSP的标签,并通过多协议网关协议MP-BGP将所述第一通知报文发布到所述第二PE。 [0017] The first PE corresponding to the first LSP routes to a Border Gateway Protocol BGP, to BGP attribute identifies the first client of the operator is not assigned to the first PE for establishing the said first LSP label, and multi-protocol gateway protocol MP-BGP to release the first notification packet to the second PE.

[0018] 在所述第一方面的第六种可能的实现方式中,所述骨干运营商网络中的第一PE确定第一客户运营商中的第一节点和所述第一PE之间的第一LSP是否可用包括: [0018] The sixth possible implementation manner of the first aspect, the backbone network of the operator defined between a first PE node of the first client and the operator of the first PE whether the first LSP available include:

[0019] 当第一PE接收到用于建立所述第一LSP的标签,且所述第一LSP存在连通性故障时,确定所述第一LSP不可用。 [0019] When the PE receives a first for establishing the first LSP label, and the presence of the first LSP connectivity fault determining the first LSP is unavailable.

[0020] 在根据所述第一方面或所述第一方面的第六种可能的实现方式的所述第一方面的第七种可能的实现方式中,所述第一通知报文包括: [0020] In a seventh embodiment according to the possible implementation of the first aspect or the sixth possible implementations of the first aspect of the first aspect, the first notification message comprising:

[0021] 用于表示所述第一PE已被分配用于建立所述第一LSP的标签但所述第一LSP存在连通性故障的标识。 [0021] for indicating the first PE have been allocated for establishing the first LSP label, but the presence of the first LSP connectivity fault identification.

[0022] 在根据所述第一方面或所述第一方面的第六种可能的实现方式或所述第一方面的第七种可能的实现方式的所述第一方面的第八种可能的实现方式中,所述第一通知报文用于通知所述第二PE撤销所述第二PE已经为与第二PE相连的第二客户运营商中的设备分配的用于建立第二LSP的标签,所述第二LSP为以第二客户运营商中的第二节点为起点、以所述第一节点为终点且经过所述第一LSP的LSP。 [0022] In accordance with the sixth or the possible implementation of the first aspect or the seventh possible implementation of the first aspect of the first aspect of the first aspect of the eighth possible implementations, the first notification message for notifying the second PE PE revocation second LSP has been established for the second client device is assigned a second carrier connected to the second PE for in tag, the second LSP to a second client node to the operator as a starting point to the first point and the end point of the first LSP through the LSP. [0023] 在根据所述第一方面的第六种可能的实现方式至所述第一方面的第八种可能的实现方式中的任意一个的所述第一方面的第九种可能的实现方式中,当确定所述第一LSP不可用时,所述第一PE向骨干运营商中的第二PE发送所述第一LSP不可用的第一通知报文,具体包括: [0023] The ninth possible implementation manner of the first aspect In a sixth possible implementation manner of the first aspect to the possible implementation of the eighth embodiment in a first aspect of the , when it is determined that the first LSP is unavailable, the PE first transmits the first notification message first LSP is unavailable to the backbone provider second PE, comprises:

[0024] 所述第一PE将所述第一LSP对应的路由引入到边界网关协议BGP,以所述BGP的属性标识所述的第一客户运营商已经给所述第一PE分配第一PE分配用于建立所述第一LSP的标签并且但所述第一LSP存在连通性故障,并通过MP-BGP协议将所述第一通知报文发布到所述第二PE。 [0024] The first PE corresponding to the first LSP routes to a Border Gateway Protocol BGP, to the BGP attribute identifies the first client of the operator has been allocated to the first first PE PE allocated for establishing the first LSP label and the presence, but the first LSP connectivity fault through MP-BGP protocol and the first notification message posted to the second PE.

[0025] 第二方面,本发明实施例提供了一种报文控制装置,其特征在于,所述装置包括: [0025] a second aspect, the present invention provides a packet control device, characterized in that said apparatus comprising:

[0026] 确定单元,用于确定第一客户运营商中的第一节点和所述第一PE之间的第一LSP是否可用,所述第一LSP以所述第一节点为终点; [0026] The determination unit, for determining a first LSP between the first client node and the operator of the first PE is available, the LSP to a first end of said first node;

[0027] 控制单元,用于当所述确定单元确定所述第一LSP不可用时,向骨干运营商中的第二PE发送所述第一LSP不可用的第一通知报文。 [0027] a control unit for, when the determining unit determines not available, transmitting the first LSP is unavailable first notification packet to the backbone provider of the first PE in the second LSP.

[0028] 在所述第二方面的第一种可能的实现方式中,所述确定单元: [0028] In a first possible implementation of the second aspect, the determination means:

[0029] 当所述第一PE在预定的时间内未接收到用于建立所述第一LSP的标签时,确定所述第一LSP不可用。 [0029] When the first PE does not receive the first LSP label for establishing within said predetermined time, determining that the first LSP is unavailable.

[0030] 在所述第二方面的第二种可能的实现方式中,还提供了所述第二方面的第二种可能的实现方式,所述第一通知报文包括用于表示所述第一PE未被分配用于建立所述第一LSP的标签的标识。 [0030] A second possible implementation of the second aspect, there is also provided a second possible implementation of the second aspect, the first notification message comprises means for indicating that the first PE is not assigned a first identifier for establishing LSP label.

[0031] 在根据所述第二方面或所述第二方面的第一种可能的实现方式或所述第二方面的第二种可能的实现方式的所述第二方面的第三种可能的实现方式中,所述第一通知报文用于通知所述第二PE避免向与所述第二PE相连的第二客户运营商中的设备分配用于建立第二LSP的标签,所述第二LSP为以所述第二客户运营商中的第二节点为起点、以所述第一节点为终点且经过所述第一LSP的LSP。 [0031] In the third aspect or the second possible implementation of the first embodiment of the second aspect or the second aspect of the second embodiment of the possible implementation of the second aspect may implementations, the first notification message for notifying the second PE device is assigned to a second client to avoid operator connected to the second PE for establishing a second LSP in a label, the second two LSP to the second client node to operators as a starting point, the end point to the first node and the first LSP through the LSP.

[0032] 在根据所述第二方面的第一种可能的实现方式至所述第二方面的第三种可能的实现方式中的任意一个的所述第二方面的第四种可能的实现方式中,还包括:接收单元,用于通过标签分发协议LDP接收用于建立所述第一LSP的标签。 [0032] In a fourth possible implementation manner in accordance with a first possible implementation of the second aspect to any one of the possible implementation of the third embodiment of the second aspect of the second aspect of the further includes: a receiving unit, for receiving via a label distribution protocol LDP for establishing the first LSP label.

[0033] 在根据所述第一方面的第一种可能的实现方式至所述第一方面的第三种可能的实现方式中任意一个的所述第二方面的第五种可能的实现方式中,所述控制单元具体用于: [0033] In a first possible implementation manner of the first aspect to the third aspect of the first possible implementation of any one of said fifth possible implementation of the second aspect the control unit is configured to:

[0034] 将所述第一LSP对应的路由引入到边界网关协议BGP,以所述BGP的属性标识所述第一客户运营商没有给所述第一PE分配用于建立所述第一LSP的标签,并通过多协议网关协议MP-BGP将所述第一通知报文发布到所述第二PE。 [0034] corresponding to the first LSP routes to a Border Gateway Protocol BGP, to BGP attribute identifies the first client of the operator is not assigned to the first PE for establishing the first LSP tag, and the second PE to publish multi-protocol gateway protocol MP-BGP to the first notification message.

[0035] 在所述第二方面的第六种可能的实现方式中,确定单元具体用于: [0035] The sixth possible implementation manner of the second aspect, the determination unit is configured to:

[0036] 当第一PE接收到用于建立所述第一LSP的标签,且所述第一LSP存在连通性故障时,确定所述第一LSP不可用。 [0036] When the PE receives a first for establishing the first LSP label, and the presence of the first LSP connectivity fault determining the first LSP is unavailable.

[0037] 在根据所述第二方面或所述第二方面的第六种可能的实现方式的所述第二方面的第七种可能的实现方式中,所述第一通知报文包括: [0037] In a seventh possible implementation according to the second embodiment or the sixth aspect of the possible implementations of the second aspect of the second aspect, the first notification message comprising:

[0038] 用于表示所述第一PE已被分配用于建立所述第一LSP的标签但所述第一LSP存在连通性故障的标识。 [0038] for indicating the first PE have been allocated for establishing the first LSP label, but the presence of the first LSP connectivity fault identification.

[0039] 在根据所述第二方面或所述第二方面的第六种可能的实现方式或所述第二方面的第七种可能的实现方式的所述第二方面的第八种可能的实现方式中,所述第一通知报文用于通知所述第二PE撤销所述第二PE已经为与第二PE相连的第二客户运营商中的设备分配的用于建立第二LSP的标签,所述第二LSP为以第二客户运营商中的第二节点为起点、以所述第一节点为终点且经过所述第一LSP的LSP。 [0039] In accordance with the sixth or the possible implementation of the second aspect or the seventh possible implementation of a second aspect of the second aspect of the second aspect of the eighth possible implementations, the first notification message for notifying the second PE PE revocation second LSP has been established for the second client device is assigned a second carrier connected to the second PE for in tag, the second LSP to a second client node to the operator as a starting point to the first point and the end point of the first LSP through the LSP.

[0040] 在根据所述第二方面的第六种可能的实现方式至所述第二方面的第八种可能的实现方式中的任意一个的所述第二方面的第九种可能的实现方式中,所述控制单元具体用于: [0040] In a sixth possible implementation manner of the second aspect to the possible implementation of the eighth embodiment of the second aspect of a possible implementation of the ninth embodiment of the second aspect , the control unit is configured to:

[0041] 将所述第一LSP对应的路由引入到边界网关协议BGP,以所述BGP的属性标识所述的第一客户运营商已经给所述第一PE分配第一PE分配用于建立所述第一LSP的标签并且但所述第一LSP存在连通性故障,并通过MP-BGP协议将所述第一通知报文发布到所述第二PE0 [0041] corresponding to the first LSP routes to a Border Gateway Protocol BGP, to identify the attribute of the BGP of the first client to the first operator has been assigned a first PE PE allocated to the development of the said first LSP LSP label and the presence, but the first communication failure, and the first notification message posted to the second through MP-BGP protocol PE0

[0042] 通过本发明实施例提供的方法,骨干运营商的PE设备将VRF实例中收到的客户运营商的路由的对应标签的信息,通过第一通知报文发布到骨干运营商的其他PE设备,使得其他的PE设备在确定下游的客户运营商的路由的对应标签不可用时,避免向上游客户运营商分配标签。 Method [0042] provided by the embodiment of the present invention, the backbone provider PE devices will VRF routing information received from the client instance of the operator corresponding to the label, other published by the PE backbone provider first notification message device, such that the other PE devices in determining the client route downstream carriers corresponding tag is not available, assign labels to avoid upstream operator customers. 通过此方案,能够控制不必要的LSP建立,降低系统对LSP的开销。 Through this program, be able to control unwanted LSP setup, reducing the overhead of the LSP.

附图说明 BRIEF DESCRIPTION

[0043] 为了更清楚地说明本发明实施例中的技术方案,下面将对实施例或现有技术描述中所需要使用的附图作简单地介绍,显而易见地,下面描述中的附图仅仅是本发明的一些实施例,对于本领域普通技术人员来讲,在不付出创造性劳动性的前提下,还可以根据这些附图获得其他的附图。 [0043] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings briefly described embodiments or the prior art needed to be used in describing the embodiments. Apparently, the drawings described below are merely Some embodiments of the present invention, those of ordinary skill in the art is concerned, without any creative effort, and may also obtain other drawings based on these drawings.

[0044] 图1为LSP建立系统架构图; [0044] FIG. 1 is a system architecture diagram establishing the LSP;

[0045] 图2为运营商的运营商系统架构图; [0045] FIG. 2 is a carrier operator system architecture diagram;

[0046] 图3为本发明实施例提供的报文控制方法的流程图; [0046] FIG. 3 is a flowchart of packet control method according to an embodiment of the present invention;

[0047] 图4为本发明实施例中LSP建立方法的流程图; [0047] FIG 4 is a flowchart of the method for establishing LSP embodiment embodiment of the present invention;

[0048] 图5为本发明实施例提供的报文控制装置的结构图; [0048] FIG 5 FIG configuration message control apparatus according to an embodiment of the present invention;

[0049] 图6为本发明另一实施例提供的报文控制装置的结构图。 [0049] FIG 6 FIG configuration message control apparatus according to another embodiment of the present invention.

具体实施方式 Detailed ways

[0050] 下面通过附图和实施例,对本发明的技术方案做进一步的详细描述。 [0050] The following drawings and embodiments, detailed description of the further aspect of the present invention.

[0051]多协议标签交换(Multiple Protocol Label Switch, MPLS)位于TCP/IP 协议栈中的链路层和网络层之间,用于向IP层提供连接服务,同时又从链路层得到服务。 [0051] MPLS (Multiple Protocol Label Switch, MPLS) is located between the TCP / IP protocol stack network layer and the data link layer, for providing a connection service to the IP layer to obtain services from the data link layer. MPLS不局限于任何特定的链路层协议,能够使用任意二层介质传输网络分组。 MPLS is not limited to any particular link layer protocol, it is possible to use any media Layer packet transport network. MPLS并不是一种业务或者应用,它实际上是一种隧道技术。 MPLS not a service or application, it is actually a tunnel technology. 这种技术不仅支持多种高层协议与业务,而且在一定程度上可以保证信息传输的安全性。 This technology supports multiple upper layer protocols and services, and to some extent, can guarantee the security of information transmission. 在此种技术中,MPLS以标签交换替代IP转发,其中标签是封装在链路层和网络层之间的一个短而定长的、只具有本地意义的连接标识符。 In this technique, the MPLS label switching to the substitute IP forwarding, which a short tag is encapsulated between the link layer and the network layer of fixed length, connection identifier has only local significance.

[0052]标签分发协议(Label Distribution Protocol,LDP)是MPLS 的一种控制协议,相当于传统网络中的信令协议,负责转发等价类(Forwarding EquivalenceClass, FEC)的分类、标签的分配以及标签交换路径(Label Switched Path,LSP)的建立和维护等操作。 [0052] Label Distribution Protocol (Label Distribution Protocol, LDP) is a control protocol MPLS signaling protocol of a traditional network, is responsible for forwarding equivalence class assignment (Forwarding EquivalenceClass, FEC) classification, labels, and label switched path (Label switched path, LSP) establishment and maintenance operations. LDP规定了标签分发过程中的各种消息以及相关处理过程。 LDP defines the label distribution of various messages and related processes.

[0053] MPLS支持多层标签,并且转发平面面向连接,故具有良好的扩展性,使在统一的MPLS/IP基础网络架构上为客户提供各类服务成为可能。 [0053] MPLS support labels and its forwarding plane is connection-oriented, it has good scalability, so that in a unified MPLS / IP-based network to provide customers with all kinds of services possible. 通过LDP协议,标签交换路由器(Label Switched Router7LSR)可以把网络层的路由信息直接映射到数据链路层的交换路径上,建立起网络层的LSP。 Through LDP label switching router (Label Switched Router7LSR) can mapping network layer routing information directly to the switching path of the data link layer, the network layer is established LSP. 目前,LDP广泛地应用于VPN服务,具有组网和配置简单、支持路由拓扑驱动建立LSP、支持大容量LSP等优点。 Currently, LDP widely used VPN services, with networking and configuration is simple, supports routing topology-driven LSP, LSP supports large capacity and so on.

[0054] VPN 是依靠Internet 服务提供商(Internet Service Provider, ISP)和网络服务提供商(Network Service Provider,NSP)在公共网络中建立的虚拟专用通信网络。 [0054] VPN is to rely on your Internet service provider (Internet Service Provider, ISP) and network service providers (Network Service Provider, NSP) virtual private communications network established in the public network. VPN的基本原理是利用隧道技术,把VPN报文封装在隧道中,利用VPN骨干网建立专用数据传输通道,实现报文的透明传输。 The basic principle is to use VPN tunneling, packets are encapsulated in the VPN tunnel using VPN backbone network to establish a dedicated data transmission channel, transparently transmitted packets.

[0055] 隧道技术使用一种协议封装另外一种协议报文,而封装协议本身也可以被其他封装协议所封装或承载。 [0055] The technology uses a tunneling protocol encapsulating a second protocol packets encapsulated protocol itself or may be encapsulated by an encapsulation protocol other carrier.

[0056] BGP/MPLS IP VPN 是一种三层虚拟专网(Layer 3Virtual Private Network,L3VPN)。 [0056] BGP / MPLS IP VPN is a Virtual Private Network Layer (Layer 3Virtual Private Network, L3VPN). 它使用边界网关协议(Border Gateway ProtocoI,BGP)在服务提供商骨干网上发布VPN路由,使用MPLS在服务提供商骨干网上转发VPN报文。 It uses the Border Gateway Protocol (Border Gateway ProtocoI, BGP) to advertise VPN routes ISP backbone network uses MPLS to forward VPN packets on backbone network service provider. 这里的IP是指VPN承载的是IP报文。 IP here it means carried by the VPN IP packets.

[0057] BGP/MPLS IP VPN服务提供商的用户本身也可能是一个服务提供商。 User [0057] BGP / MPLS IP VPN service provider itself may be a service provider. 这种情况下,前者称为提供商运营商(provider carrier)或一级运营商(firstcarrier),后者称为客户运营商(customer carrier)或二级运营商(second carrier),如图2所示。 In this case, the former is referred to as a provider operator (provider carrier) or a carrier (firstcarrier), which is called the client operator (customer carrier) or secondary carrier (second carrier), as shown in FIG 2 shows. 这种组网模型称为运营商的运营商(carriers'carrier),低级别的服务提供商SP (Service Provider)作为更高级别SP的VPN客户。 This networking model called carrier's carrier (carriers'carrier), low-level service provider SP (Service Provider) as a higher level of SP's VPN client.

[0058] 为保持良好的可扩展性,二级运营商采用一级运营商CE只把二级运营商内部的路由发布给一级运营商的PE,不发布自己客户的路由。 [0058] In order to maintain good scalability, the second carrier adopts a carrier CE advertises routes only inside of the second carrier to the first carrier PE, customers do not publish their own routes. 在本文的描述中,二级运营商内部的路由称为内部路由,二级运营商客户的路由称为外部路由。 In the description herein, two routes of the internal routing carrier called internal, the second carrier route called external customer routes.

[0059] 其中,内部路由和外部路由的区别在于:内部路由是指二级运营商交换路径SP站点的路由,需要在相关的一级运营商PE间通过BGP进行交换;外部路由是指二级运营商客户站点的路由,即二级运营商的VPN路由。 [0059] wherein the difference between internal and external routes that routes: route is a route path SP second carrier exchange station needs to be exchanged by BGP between an operator of the PE; refers to two external route route operator at the customer site, that the Level 2 carrier VPN routes. 外部路由不发布给一级运营商的PE设备,只在相关二级运营商PE间通过BGP进行交换。 An external route not advertised to the PE device operator only exchanged by BGP between two PE carrier.

[0060] 客户BGP/MPLS VPN服务提供商(也就是二级运营商)的VPN_IPv4路由被看作外部路由,骨干BGP/MPLS VPN服务提供商(也就是一级运营商)并不将这些路由引入到它自己的VPN路由转发表,它只引入客户BGP/MPLSVPN服务提供商的内部路由。 [0060] Customer BGP / MPLS VPN service provider (that is, the second carrier) of VPN_IPv4 route is regarded as external routing, the backbone BGP / MPLS VPN service provider (ie, a carrier) will not introduce these routes to its own VPN routing and forwarding table, only the introduction of internal routing client BGP / MPLSVPN service provider. 这样,减少了一级运营商网络中需要维护的路由数量。 In this way, reducing the number of routes a carrier network in need of maintenance. 二级运营商需要维护内部路由和外部路由。 Two operators need to maintain internal routing and external routing.

[0061] 由于,在MPLS技术中存在客户运营商的提供者边缘设备C-PE2需要迭代VPN业务到某隧道时,如果下游客户运营商侧的LDP中断,上游客户运营商侧的提供者边缘设备C-PE2无法感知隧道已经不可用,不能进行路由收敛,无法把流量切换到其他正常的隧道上,会导致业务中断。 [0061] Because of the presence client operator provider edge device C-PE2 in the MPLS technique requires an iterative VPN service time to a tunnel, if the LDP downstream customers operator side is interrupted upstream of the client operator side provider edge device C-PE2 can not perceive the tunnel is not available, the convergence can not be routed, not the normal traffic is switched to the other tunnel will cause service interruption. 并且当下游客户运营商仅需要对小部分前缀建立LSP时,由于上游客户运营商侧无法区分,会浪费label和LSP资源。 When downstream customers and operators need only a small part of the establishment of LSP prefix, because the upstream side of the customer operators can not be distinguished, and the LSP label will waste resources. [0062] 为此,本发明实施例提供一种报文控制方法的方法。 [0062] To this end, embodiments of the present invention provides a method of packet control method. 图3是本发明实施例提供的报文控制方法一种实施例的流程图。 FIG 3 is a message control method of the present invention provided a flow diagram of the embodiment. 在该实施例中,执行主体为骨干运营商中的位于上游的提供者边缘设备,也就是背景技术图1中的PE1,由图可见,所述方法包括以下内容。 In this embodiment, the execution subject to the provider edge device is located upstream of the backbone provider, i.e. the Background Art FIG. 1 PE1 seen from the figure, the method includes the following.

[0063] 步骤301,骨干运营商网络中的第一PE确定第一客户运营商中的第一节点和所述第一PE之间的第一LSP是否可用,所述第一LSP以所述第一节点为终点; [0063] Step 301, the backbone network of the operator first determines a first PE node LSP between the first client and the operator of the first PE is available, the first to the second LSP an end node;

[0064] 具体的,骨干运营商的第一PE,例如图1中的PEl为站点I (sitel)侧的客户运营商创建一个第一VRF。 [0064] Specifically, the first PE backbone provider, for example, in FIG. 1 PEl site I (sitel) client-side to create a first carrier for the VRF. 也就是产生一个到客户运营商的PE设备C-PEl的路由,具体的产生方法可以是通过IGP协议动态学习,或者静态配置,本发明实施例包括但不限定于以上的几种方法。 That is to produce a carrier PE routing client device C-PEl, the specific generating method may be dynamically learned via an IGP protocol, or static configuration, embodiments of the present invention include, but are not limited to the above several methods.

[0065] PEl通过所述第一VRF实例接收第一客户运营商中的第一客户运营商提供者边缘设备C-PEl到第一PE的第一LSP,C-PEl作为第一LSP的终点。 [0065] PEl VRF instances received by the first client first operator in the operator first client provider edge device C-PEl first LSP to the first PE, C-PEl LSP as the first endpoint. 优选的,PEl通过标签分发协议(LDP)接收用于建立所述第一LSP的标签,客户运营商发布标签给骨干运营商的方法通常是采用LDP,还可以是其他方法,本发明只是列举了示例性的常用方法,不限于上述方法。 Preferably, PEl by Label Distribution Protocol (LDP) for receiving said first establishing an LSP label, the label release method to the client operator backbone provider usually by the LDP, may be other methods, but the present invention include the exemplary conventional methods is not limited to the above method.

[0066] PEl可能会接收到用于建立所述第一LSP的标签,也可能接收不到上述的标签。 [0066] PEl may receive the first for establishing an LSP label, the label may not receive the above.

[0067] 当所述PEl在预定的时间内未接收到用于建立所述第一LSP的标签时,或者当第一接收到用于建立所述第一LSP的标签,但所述第一LSP存在连通性故障时,确定所述第一LSP不可用。 [0067] When the PEl not received the first LSP label for establishing a predetermined time, or when the first reception of the first label is used to establish the LSP, the LSP of the first when a connectivity fault exists, determining that the first LSP is unavailable.

[0068] 步骤302,当确定所述第一LSP不可用时,所述第一PE向骨干运营商中的第二PE发送所述第一LSP不可用的第一通知报文。 [0068] Step 302, when it is determined that the first LSP is unavailable, the PE first transmits the first notification message first LSP is unavailable to the backbone provider second PE.

[0069] 通过本发明实施例提供的方法,骨干运营商的PE设备将VRF中收到的下游客户运营商的路由的对应标签是否存在的信息,通过信令消息发送到骨干运营商的其他PE设备,使得其他PE设备能够根据情况判断是否需要向上游的客户运营商分配标签,从而节省标签并且降低系统对LSP的开销。 Method [0069] provided by the embodiment of the present invention, the backbone provider PE devices VRF routes the information received in the downstream customers operator corresponding label is present, transmitted to the other by the PE backbone provider a signaling message equipment, such other PE device can determine whether the customer needs to allocate labels for the operator according to the situation, thereby saving system overhead and reduces the label of the LSP.

[0070] 在一种实施方式中,PEl在当所述第一PE因在预定的时间内未接收到用于建立所述第一LSP的标签而确定所述第一LSP不可用时,向PE2发送第一通知报文,所述第一通知报文中包括用于表示所述第一PE未被分配用于建立所述第一LSP的标签的标识。 [0070] In one embodiment, the PEl when the first PE is not received by the first LSP label for establishing a predetermined time and determining the first LSP is unavailable sent to PE2 first notification message, the first notification packet for indicating the first PE comprises not allocated for establishing the first LSP identifying tag. 所述第一通知报文用于通知所述PE2避免向与所述PE2相连的第二客户运营商中的设备分配用于建立第二LSP的标签。 The first notification packet for notifying the second device is assigned to avoid PE2 operator of the client to PE2 for establishing a second LSP in a label. 可选地,所述第二LSP为以所述第二客户运营商中的第二节点为起点、以所述第一节点为终点且经过所述第一LSP的LSP。 Alternatively, the second LSP to a second node is a client of the operator of the second starting point to the first point and the end point of the first LSP through the LSP. 所述第一节点可以是图1所示的C-PEl,第二节点可以是图1所示的C-PE2,第一节点和第二节点也可以是其他节点。 The first node may be C-PEl shown in Figure 1, the second node may be a C-PE2 as shown in FIG. 1, the first node and the second node may be another node. 所述第二LSP可以看作是对第一LSP的延长,第一LSP可以看作是第二LSP的一部分。 The second LSP is regarded as the extension of the first LSP, the LSP is regarded as a first part of the second LSP.

[0071 ] 更具体的,骨干运营商第一PE设备把第一VRF中的到第一客户运营商的路由引入到BGP,采用BGP的属性标识所述第一客户运营商没有给所述第一PE分配用于建立所述第一LSP的标签,并通过MP-BGP协议发布到骨干运营商的其他PE设备,例如PE2。 [0071] More specifically, the backbone provider first PE device in the VRF route to the first carrier of the first client into BGP, the BGP attribute identifies the first client to the first operator does not PE allocated for establishing the first LSP label, and released through MP-BGP protocol to the other PE devices in the backbone of the operator, e.g. PE2. 上述采用的BGP属性,在一个实施例中是采用BGP的扩展团体属性,还可以是其他方法,本发明实施例只是列举了示例性的常用的方法,不限于上述方法。 BGP attribute using the above-described, in one embodiment, is the use of BGP extended community attribute, and may also be other methods, embodiments of the present invention include commonly used only exemplary method is not limited to the above method.

[0072] 骨干运营商的其他PE设备,例如PE2依据第一通知报文判断是否需要触发第二VRF实例向第二客户运营商分配用于建立第二LSP的标签。 [0072] backbone operators of other PE equipment, such as PE2 depending on whether the first notification message needs to trigger the second VRF instance judgment to the second client operators allocated to the development of the second LSP label. [0073] 通过上述实施例,PE2设备能够根据下游的客户运营商是否已经为对应的客户运营商的路由分配标签,判断是否需要向上游的客户运营商分配标签,从而节省标签并且降低系统对LSP的开销。 [0073] By the above-described embodiment, PE2 apparatus can be based on whether the downstream customers operators have a corresponding client carrier route assignment label, determines whether the customer operators assign labels to upstream, thereby saving the label and reduces the system LSP s expenses.

[0074] 在另一种实施方式中,PE1,即第一PE,在接收到用于建立所述第一LSP的标签,且所述第一LSP存在连通性故障时,确定所述第一LSP不可用,并向PE2,即第二PE,发送第一通知报文,该第一通知报文中包括用于表示所述第一PE已被分配用于建立所述第一LSP的标签但所述第一LSP存在连通性故障的标识。 [0074] In another embodiment, PEl, i.e. the first PE, upon receiving a first for establishing the LSP label, and the presence of the first LSP connectivity fault determining the first LSP not available, and PE2, a second PE i.e., transmitting a first notification message, the first notification comprising a message representing the first PE have been allocated for establishing the first label of the LSP but identifying the presence of said first connectivity fault LSP. 所述第一通知报文用于通知所述PE2撤销所述PE2已经为与第二PE相连的第二客户运营商中的设备分配的用于建立第二LSP的标签,所述第二LSP为以第二客户运营商中的第二节点C-PE2为起点、以所述第一节点C-PEl为终点且经过所述第一LSP的LSP,即第二LSP。 The first notification packet for notifying the revocation PE2 PE2 second LSP label has been established for the second client device is assigned operators and is connected to the second PE for the second LSP. C-PE2 node to a second client operators as a starting point, to the first node and ending at C-PEl first LSP through the LSP, i.e., the second LSP.

[0075] 更具体的,骨干运营商第一PE设备把第一VRF中的到第一客户运营商的路由引入到BGP,采用BGP的属性进行标识,以所述BGP的属性标识所述的第一客户运营商已经给所述第一PE分配第一PE分配用于建立所述第一LSP的标签但所述第一LSP存在连通性故障,并通过MP-BGP协议发布到骨干运营商的其他PE设备,例如PE2。 [0075] More specifically, the backbone provider first PE device in the VRF route to the first carrier of the first client into BGP, using the attribute of the BGP identified, to identify the attribute of the BGP a client operator has allocated to the first PE PE allocated for establishing a first of said other of said first LSP label, but the presence of the first LSP connectivity fault and distribution to the backbone operator through MP-BGP protocol PE device, e.g. PE2. 上述采用的BGP属性,在一个实施例中是采用BGP的扩展团体属性,还可以是其他方法,本发明实施例只是列举了示例性的常用的方法,不限于上述方法。 BGP attribute using the above-described, in one embodiment, is the use of BGP extended community attribute, and may also be other methods, embodiments of the present invention include commonly used only exemplary method is not limited to the above method.

[0076] 骨干运营商的其他PE设备,例如PE2依据第一通知报文撤销已经分配的用于建立第二LSP的标签,以便撤销第二LSP。 [0076] Other backbone provider PE device PE2 according to the first example, the revocation notification message has been assigned a tag for establishing a second LSP to a second withdrawal LSP.

[0077] 上述的实施方法,同样适用于已经建立从C-PE2到C-PEl的LSP的情况,即PEl发现从PEl到C-PEl之间的第一LSP存在故障,则通知PE2撤销从PE2到C-PE2之间的标签。 [0077] The above-described embodiment the method is equally applicable to the situation has been established LSP from the C-PE2 to C-PEl, i.e. from PEl to PEl found faulty LSP between a first C-PEl, PE2 revocation notification from PE2 the labels between C-PE2.

[0078] 通过本实施例提供的方法,能够使得骨干运营商的除PEl外的其他PE设备能够及时获知LSP中断的信息,从而使其他PE避免继续建立一条中断的LSP的或者使其他PE撤销已经中断的LSP,避免资源浪费和业务损失。 [0078] by the method provided in this embodiment, it is possible that the backbone provider other PE devices except PEl can timely obtain information LSP interrupted, so that the other PE continue to avoid establishing an interruption of the LSP or to other PE revocation has interrupted LSP, to avoid waste of resources and loss of business.

[0079] 优选的,在另外一种实施方式中,当PEl确定所述第一LSP可用时,所述第一PE向骨干运营商中的第二PE发送所述第一LSP可用的第二通知报文,以便于所述第二PE根据所述第二通知报文,向与所述第二PE相连的第二客户运营商中的设备分配用于建立第二LSP的标签,所述第二LSP为以所述第二客户运营商中的第二节点为起点、以所述第一节点为终点且经过所述第一LSP的LSP。 [0079] Preferably, in another embodiment, when determining the first LSP available PEl, the first PE sending the key operator first PE in the second LSP second notification is available packet to the second PE according to the second notification message to the second client device is assigned to the second operator is connected to the PE label for the second LSP is established, the second LSP to the second client node to operators as a starting point, the end point to the first node and the first LSP through the LSP. 实际上,第二LSP包括了第一LSP,第一LSP可以看做是第二LSP的一部分,而第二LSP可以看作是第一LSP的延长。 In fact, the second LSP comprises a first LSP, LSP may be regarded as a first part of the second LSP and the second LSP may be regarded as extension of the first LSP.

[0080] 此外,无论第一LSP是否可用,第一PE均可以向第二分配一个用于建立所述第二LSP的标签。 [0080] Further, regardless of the availability of the first LSP, a first PE can be used to establish the second LSP label assigned to the second.

[0081] 具体而言,所述第一LSP可用是指PEl接收到用于建立所述第一LSP的标签,且所述第一LSP不存在连通性故障时。 [0081] Specifically, the first LSP is available PEl receiving means for establishing the first LSP label, and the first LSP connectivity problems do not exist.

[0082] 在这种情况下,PEl可以选择发送第二通知报文,告知PE2第一LSP可用。 [0082] In this case, PEl can choose to send the second notification message to inform the first LSP PE2 available.

[0083] PE2可以在接收到第二通知报文之后,为客户运营商创建一个第二虚拟路由交换VRF实例;PE2与PEl类似,也为PE2连接的第二客户运营商的C-PE2也创建一个VRF,我们称为VRF2。 [0083] PE2 may be performed after receiving the second notification message, create a second virtual operator customer routing switch VRF instance; PEl and PE2 Similarly, the second client operator C-PE2 PE2 is also connected to create a VRF, we call VRF2. 产生的方法可以是通过IGP协议动态学习,或者静态配置。 The method may be produced by the IGP dynamic learning or static configuration. 这里只列举了最常见的方法,本发明不限于上述两种方法。 Just to name the most common method, the present invention is not limited to the above-described two methods.

[0084] PE2通过第二通知报文获知第一LSP可用,则触发第二VRF实例向所述第二客户运营商分配标签,建立所述第三LSP,也就是从C-PE2到PE2的LSP,进一步建立从C-PE2到C-PEl 的LSP。 [0084] PE2 second notification message is known by the first LSP is available, then the operator to trigger the second VRF instance tag assigned to the second client, establishing the third LSP, that is, from the C-PE2 PE2 to an LSP further establish LSP from the C-PE2 to the C-PEl.

[0085] 例如,PE2可以根据图4所述的流程进行处理。 [0085] For example, PE2 may be processed according to Scheme 4 in FIG.

[0086] 步骤401,接收MP-BGP发布的路由,并将所述路由引入到所述第二VRF对应的IGP中; [0086] Step 401, the received routes by MP-BGP, and the second route into the VRF corresponding to the IGP;

[0087] 步骤402,解析所述BGP携带的属性,若存在所述第一PE增加的指定属性,则执行步骤403,反之,结束; [0087] Step 402, parsing the BGP attribute carried, if the first PE increased specified attribute exists, step 403 is executed, otherwise, ending;

[0088] 具体而言,存在第一PE增加的指定属性说明第一LSP可用,如果不存在,则证明第一LSP不可用。 [0088] Specifically, there is a first PE increased specified property described first LSP is available, and if not, the proof of the first LSP is unavailable.

[0089] 步骤403,触发所述第二VRF实例中的LDP为所述路由向所述第二客户运营商分配标签。 [0089] Step 403, the second trigger LDP instance VRF route to said label carriers allocated to the second client.

[0090] 通过上述实施例,能够使得骨干运营商的除PEl外的其他PE设备能够及时获知LSP中断的信息,从而停止建立一条中断的LSP或者侧小一条中断的LSP。 [0090] By the above-described embodiment, it is possible that the other backbone provider PE devices except PEl timely obtain information of the LSP interrupted, thereby stopping the establishment of a LSP is interrupted or a small side LSP interrupted. 这条LSP的起点可以发现LSP无法建立或者LSP被撤销,这样就有机会对受影响的业务采取措施,避免资源浪费和业务损失。 This starting point can be found LSP LSP LSP can not be established or revoked, so have the opportunity to take measures for the affected businesses, to avoid waste of resources and loss of business.

[0091] 相应的,请参考图5,本发明实施例还提供一种报文控制装置,例如前述实施例中的骨干运营商中的PE设备,包括: [0091] Accordingly, please refer to FIG. 5, a further embodiment of the present invention provides a packet control means, for example in the embodiment of the backbone provider equipment PE preceding embodiment, comprising:

[0092] 确定单元501,用于确定第一客户运营商中的第一节点和所述第一PE之间的第一LSP是否可用,所述第一LSP以所述第一节点为终点; [0092] determination unit 501 for determining a first LSP between the first client node and the operator of the first PE is available, the LSP to a first end of said first node;

[0093] 控制单元502,用于当所述确定单元501确定所述第一LSP不可用时,向骨干运营商中的第二PE发送表明所述第一LSP不可用的第一通知报文。 [0093] The control unit 502, when the determination unit 501 for determining the first LSP is unavailable, the backbone provider second PE transmits the first notification indicates that the first LSP packet unavailable.

[0094] 所述确定单元501可以由至少一个控制电路实现,所述控制单元502可以由至少一个控制电路实现。 [0094] The determination unit 501 may be implemented by the at least one control circuit, the control unit 502 may be implemented by the at least one control circuit.

[0095] 所述确定单元501:当所述第一PE在预定的时间内未接收到用于建立所述第一LSP的标签时,或者收到用于建立第一LSP的标签,但是第一LSP存在故障的情况下,确定所述第一LSP不可用。 [0095] The determining unit 501: first, when the PE receives the first LSP is not a tag for establishing a predetermined time, or to receive a first for establishing an LSP label, the first in the presence of a failure LSP, determining the first LSP is unavailable.

[0096] 在一种较佳的实施方式中,所述装置还包括接收单元503,用于通过标签分发协议LDP接收用于建立所述第一LSP的标签。 [0096] In one preferred embodiment, the apparatus further comprises a receiving unit 503 for receiving through a Label Distribution Protocol LDP for establishing the first LSP label. 所述接收单元503可以由至少一个接收电路实现。 The receiving unit 503 may be implemented by at least one receiving circuit.

[0097] 控制单元502发送的所述第一通知报文中包括用于表示所述第一PE未被分配用于建立所述第一LSP的标签的标识,通知所述第二PE避免向与所述第二PE相连的第二客户运营商中的设备分配用于建立第二LSP的标签,所述第二LSP为以所述第二客户运营商中的第二节点为起点、以所述第一节点为终点且经过所述第一LSP的LSP。 [0097] The control unit 502 transmits a first notification packet for indicating the first PE comprises not allocated for establishing the identity of the first LSP label, to avoid notifying the second PE and the second client device is assigned operators connected to the second PE for establishing a second LSP label, the second LSP as the second client node to operators as a starting point, to the the first end point through the first LSP and LSP.

[0098] 优选的,控制单元502将所述第一LSP对应的路由引入到边界网关协议BGP,以所述BGP的属性标识所述第一客户运营商没有给所述第一PE分配用于建立所述第一LSP的标签,并通过多协议网关协议MP-BGP将所述第一通知报文发布到所述第二PE。 [0098] Preferably, the first LSP corresponding to the route control unit 502 is introduced into the Border Gateway Protocol BGP, to BGP attribute identifies the first client of the operator is not assigned to the first PE for establishing the first LSP label, and the first notification message posted to the second multi-protocol gateway protocol PE through MP-BGP.

[0099] 在另外一种实施例中,确定单元501当第一接收到用于建立所述第一LSP的标签,且所述第一LSP存在连通性故障时,确定所述第一LSP不可用。 [0099] In another embodiment, when the first determination unit 501 receives the first LSP label for establishing, and the presence of the first LSP connectivity fault determining the first LSP is unavailable .

[0100] 控制单元502发送的所述第一通知报文中包括表示所述第一PE已被分配用于建立所述第一LSP的标签但所述第一LSP存在连通性故障的标识,所述第一通知报文用于通知所述第二PE撤销所述第二PE已经为与第二PE相连的第二客户运营商中的设备分配的用于建立第二LSP的标签,所述第二LSP为以第二客户运营商中的第二节点为起点、以所述第一节点为终点且经过所述第一LSP的LSP。 [0100] The control unit 502 transmits a first notification packet includes information indicating the first PE have been allocated for establishing the first LSP label, but the presence of the first LSP connectivity fault identification, the said first notification packet for notifying the second PE PE revocation second second LSP label has been established for the second client device is assigned to the second operator is connected to the PE for the first two LSP to the second client node to carriers as a starting point, the end point to the first node and the first LSP through the LSP.

[0101] 优选的,所述控制单元502将所述第一LSP对应的路由引入到边界网关协议BGP,以所述BGP的属性标识所述的第一客户运营商已经给所述第一PE分配第一PE分配用于建立所述第一LSP的标签并且但所述第一LSP存在连通性故障,并通过MP-BGP协议将所述第一通知报文发布到所述第二PE。 [0101] Preferably, the control unit 502 corresponding to the first route LSP into a Border Gateway Protocol BGP, to the BGP attribute identifies the first client of the operator has been allocated to the first PE first PE allocated for establishing the first LSP label and the presence, but the first LSP connectivity fault through MP-BGP protocol and the first notification message posted to the second PE.

[0102] 可选的,在另外一种实施方式中,所述控制单元502还用于,当所述确定单元确定所述第一LSP可用时,向骨干运营商中的第二PE发送所述第一LSP可用的第二通知报文,以便于所述第二PE根据所述第二通知报文,向与所述第二PE相连的第二客户运营商中的设备分配用于建立第二LSP的标签,所述第二LSP为以所述第二客户运营商中的第二节点为起点、以所述第一节点为终点且经过所述第一LSP的LSP。 [0102] Alternatively, in another embodiment, the control unit 502 is further configured to, when the determining unit determines that the first LSP is available, send to the backbone provider in the second PE the first LSP usable second notification message, according to the second notification message to the second client device is assigned to the second carrier in the PE connected to the second for establishing a second PE LSP label, the second LSP to a second node is a client of the operator of the second starting point to the first point and the end point of the first LSP through the LSP.

[0103] 值得注意的是,前述的实施例中的各个模块分别是为了实现图3所示的方法的功能模块,实际上PE设备很大可能同时具有实现图3-图4所示的方法的功能,因此上述的两种实施例中的各个模块完全能够集成在同一PE设备中,不应理解为对本发明实施例的限制。 [0103] It is noted that the foregoing embodiments are modules for functional modules realizing the method shown in Figure 3, in fact, the PE device may also have a great 4 implement the method shown in Figures 3 function, and therefore both of the above embodiments, each module can be fully integrated in the same PE device, it should not be construed as limited to the embodiments of the present invention.

[0104] 图6为本发明实施例报文控制装置的示意图,如图所示,本实施例包括网络接口61、处理器62和存储器63。 [0104] FIG. 6 is a schematic diagram of the packet control means of the present embodiment of the invention, as shown, this embodiment includes a network interface 61, processor 62 and a memory 63. 系统总线64用于连接网络接口61、处理器62和存储器63。 The system bus 64 is used to connect the network interface 61, processor 62 and a memory 63.

[0105] 网络接口61用于与其他设备进行通信。 [0105] The network interface 61 for communicating with other devices.

[0106] 存储器63可以是永久存储器,例如硬盘驱动器和闪存,存储器63中具有软件模块和设备驱动程序。 [0106] The memory 63 may be a persistent storage, such as hard drives and flash memory, a memory module 63 having software and device drivers. 软件模块能够执行本发明上述方法的各种功能模块;设备驱动程序可以是网络和接口驱动程序。 A software module capable of performing the various functional modules of the present invention, the method described above; may be a network device driver and the interface driver.

[0107] 在启动时,这些软件组件被加载到存储器63中,然后被处理器62访问并执行如下指令: [0107] At startup, these software components are loaded into memory 63, and then accessed and executed by the instruction processor 62 as follows:

[0108] 骨干运营商网络中的第一PE确定第一客户运营商中的第一节点和所述第一PE之间的第一LSP是否可用,所述第一LSP以所述第一节点为终点; [0108] backbone of the first operator network determining a first PE node LSP between the first client and the operator of the first PE is available, the first LSP to the first node end;

[0109] 当确定所述第一LSP不可用时,所述第一PE向骨干运营商中的第二PE发送表明所述第一LSP不可用的第一通知报文。 [0109] When it is determined that the first LSP is unavailable, the backbone of the first PE in the second PE operator transmits the first notification indicates that the first LSP packet unavailable.

[0110] 图6所示的报文控制装置,可以用于执行图3-图4所示的报文控制方法,只需要在存储器或者处理器中作出相应的配置即可,不多赘述。 Packet control device shown in [0110] FIG. 6, the message may be used to execute the control method shown in FIGS. 3-4, only need to be made to the corresponding configuration memory or a processor, much repeated.

[0111] 专业人员应该还可以进一步意识到,结合本文中所公开的实施例描述的各示例的单元及算法步骤,能够以电子硬件、计算机软件或者二者的结合来实现,为了清楚地说明硬件和软件的可互换性,在上述说明中已经按照功能一般性地描述了各示例的组成及步骤。 [0111] professionals should also be further appreciated that, as disclosed herein in conjunction with units and algorithm steps described exemplary embodiments, by electronic hardware, computer software, or a combination thereof. In order to clearly illustrate hardware and software interchangeability, in the above description, according to functions generally described compositions and steps of the examples. 这些功能究竟以硬件还是软件方式来执行,取决于技术方案的特定应用和设计约束条件。 Whether these functions are performed by hardware or software depends upon the particular application and design constraints of the technical solutions. 专业技术人员可以对每个特定的应用来使用不同方法来实现所描述的功能,但是这种实现不应认为超出本发明的范围。 Professional technical staff may use different methods for each specific application to implement the described functionality, but such implementation should not be considered outside the scope of the present invention.

[0112] 结合本文中所公开的实施例描述的方法或算法的步骤可以用硬件、处理器执行的软件模块,或者二者的结合来实施。 [0112] The steps of a method or algorithm described in the embodiments disclosed herein may be implemented in hardware, or a combination thereof, in a software module executed by a processor to implement. 软件模块可以置于随机存储器(RAM)、内存、只读存储器(ROM)、电可编程ROM、电可擦除可编程ROM、寄存器、硬盘、可移动磁盘、CD-ROM、或技术领域内所公知的任意其它形式的存储介质中。 A software module may be placed in a random access memory (RAM), a memory, a read only memory (ROM), electrically programmable ROM, an electrically erasable programmable ROM, a register, a hard disk, a removable disk, CD-ROM, or within the technical field known any other form of storage medium.

[0113] 以上所述的具体实施方式,对本发明的目的、技术方案和有益效果进行了进一步详细说明,所应理解的是,以上所述仅为本发明的具体实施方式而已,并不用于限定本发明的保护范围,凡在本发明的精神和原则之内,所做的任何修改、等同替换、改进等,均应包含在本发明的保护范围之内。 [0113] The foregoing specific embodiments, objectives, technical solutions, and advantages of the invention will be further described in detail, it should be understood that the above descriptions are merely specific embodiments of the present invention, but not intended to limit the scope of the present invention, all within the spirit and principle of the present invention, any changes made, equivalent substitutions and improvements should be included within the scope of the present invention.

Claims (20)

  1. 1.一种报文控制方法,其特征在于,所述方法包括: 骨干运营商网络中的第一PE确定第一客户运营商中的第一节点和所述第一PE之间的第一LSP是否可用,所述第一LSP以所述第一节点为终点; 当确定所述第一LSP不可用时,所述第一PE向骨干运营商中的第二PE发送表明所述第一LSP不可用的第一通知报文。 A message control method, characterized in that, said method comprising: a backbone network operator determines the first PE LSP between a first node of the first client and the operator first PE is available, the LSP to a first end of said first node; when it is determined that the first LSP is unavailable, the first PE indicates that the first to the second LSP is unavailable sent by the PE backbone provider in the first notification message.
  2. 2.根据权利要求1所述的方法,其特征在于,所述骨干运营商网络中的第一 PE确定第一客户运营商中的第一节点和所述第一PE之间的第一LSP是否可用包括: 当所述第一PE在预定的时间内未接收到用于建立所述第一LSP的标签时,确定所述第一LSP不可用。 2. The method according to claim 1, wherein said backbone network operator determines the first PE LSP between a first node of the first client and the operator whether the first PE available comprising: when the first PE is not received for establishing the LSP labels within a first predetermined time, determining that the first LSP is unavailable.
  3. 3.如权利要求2所述的方法,其特征在于,所述第一通知报文包括用于表示所述第一PE未被分配用于建立所述第一LSP的标签的标识。 The method according to claim 2, wherein said first notification packet for indicating the first PE comprises not allocated for establishing the identity of the first LSP label.
  4. 4.根据权利要求1、2或3所述的方法,其特征在于, 所述第一通知报文用于通知所述第二PE避免向与所述第二PE相连的第二客户运营商中的设备分配用于建立第二LSP的标签,所述第二LSP为以所述第二客户运营商中的第二节点为起点、以所述第一节点为终点且经过所述第一LSP的LSP。 4. The method of claim 2 or claim 3, wherein said first notification packet for notifying the second PE to avoid to the second client and the second operators connected to PE allocating a second device for establishing an LSP label, the second LSP to a second node is a client of the operator of the second starting point to the end point and the first node through the first LSP LSP.
  5. 5.如权利要求2-4任一项所述的方法,其特征在于,所述第一 PE通过标签分发协议LDP接收用于建立所述第一LSP的标签。 5. The method of any one of claims 2-4, wherein the first PE through a label distribution protocol LDP receiver for establishing the first LSP label.
  6. 6.如权利要求2-4所述的方法,其特征在于,当确定所述第一 LSP不可用时,所述第一PE向骨干运营商中的第二·PE发送表明所述第一LSP不可用的第一通知报文,具体包括: 所述第一PE将所述第一LSP对应的路由引入到边界网关协议BGP,以所述BGP的属性标识所述第一客户运营商没有给所述第一PE分配用于建立所述第一LSP的标签,并通过多协议网关协议MP-BGP将所述第一通知报文发布到所述第二PE。 6. The method according to claims 2-4, characterized in that, when it is determined that the first LSP is unavailable, the first PE in the second backbone provider · PE indicates that the first LSP is unavailable sent with the first notification message, comprises: a first PE corresponding to the first LSP routes to a border gateway protocol BGP, to BGP attribute identifies the first client to the operator no first PE allocated for establishing the first LSP label, and multi-protocol gateway protocol MP-BGP to release the first notification packet to the second PE.
  7. 7.根据权利要求1所述的方法,其特征在于,所述骨干运营商网络中的第一 PE确定第一客户运营商中的第一节点和所述第一PE之间的第一LSP是否可用包括: 当第一PE接收到用于建立所述第一LSP的标签,且所述第一LSP存在连通性故障时,确定所述第一LSP不可用。 7. The method according to claim 1, wherein said backbone network operator determines the first PE LSP between a first node of the first client and the operator whether the first PE available comprising: a first when the first PE for establishing an LSP label is received, and the presence of the first LSP connectivity fault determining the first LSP is unavailable.
  8. 8.根据权利要求1或7所述的方法,其特征在于,所述第一通知报文包括: 用于表示所述第一PE已被分配用于建立所述第一LSP的标签但所述第一LSP存在连通性故障的标识。 8. The method according to claim 17, wherein the first notification message comprising: means for representing the first of the first PE has been allocated for establishing the LSP label, but the identifying the presence of a first connectivity fault LSP.
  9. 9.根据权利要求1、7或8所述的方法,其特征在于, 所述第一通知报文用于通知所述第二PE撤销所述第二PE已经为与第二PE相连的第二客户运营商中的设备分配的用于建立第二LSP的标签,所述第二LSP为以第二客户运营商中的第二节点为起点、以所述第一节点为终点且经过所述第一LSP的LSP。 9. The method of claim 7 or claim 8, wherein said first notification packet for notifying the second PE to withdraw the second PE is connected to the second second PE client device assignment operator for establishing a second LSP in a label, the second LSP to a second client node to carriers as a starting point to the first point and passing through said second end a LSP of the LSP.
  10. 10.如权利要求7-9任一项所述的方法,其特征在于,当确定所述第一LSP不可用时,所述第一PE向骨干运营商中的第二PE发送表明所述第一LSP不可用的第一通知报文,具体包括: 所述第一PE将所述第一LSP对应的路由引入到边界网关协议BGP,以所述BGP的属性标识所述的第一客户运营商已经给所述第一PE分配第一PE分配用于建立所述第一LSP的标签并且但所述第一LSP存在连通性故障,并通过MP-BGP协议将所述第一通知报文发布到所述第二PE。 10. The method of any one of claims 7-9, characterized in that, when it is determined that the first LSP is unavailable, indicate the first to the second PE PE backbone provider transmits in the first first notification packet unavailable LSP, comprises: a first PE corresponding to the first LSP routes to a border gateway protocol BGP, to the BGP attribute identifies the operators have a first client a first allocation to the first PE PE LSP allocated for establishing the first tag and the first LSP exists but communication failure, and the first to publish the notification message through MP-BGP protocol said second PE.
  11. 11.一种报文控制装置,其特征在于,所述装置包括: 确定单元,用于确定第一客户运营商中的第一节点和所述第一PE之间的第一LSP是否可用,所述第一LSP以所述第一节点为终点; 控制单元,用于当所述确定单元确定所述第一LSP不可用时,向骨干运营商中的第二PE发送表明所述第一LSP不可用的第一通知报文。 A packet control device, characterized in that said means comprises: determining means for determining a first LSP between the first client node and the operator of the first PE is available, the LSP to said first end of said first node; a control unit for, when the determining unit determines that the first LSP is unavailable, indicating the second PE transmits the backbone provider in the first LSP is unavailable the first notification message.
  12. 12.根据权利要求11所述的装置,其特征在于,所述确定单元: 当所述第一PE在预定的时间内未接收到用于建立所述第一LSP的标签时,确定所述第一LSP不可用。 12. The apparatus as claimed in claim 11, wherein said determining means: when the first PE is not received within a predetermined time of the first label is used to establish the LSP, determining the second a LSP is unavailable.
  13. 13.如权利要求12所述的装置,其特征在于,所述第一通知报文包括用于表示所述第一PE未被分配用于建立所述第一LSP的标签的标识。 13. The apparatus of claim 12, wherein said first notification packet for indicating the first PE comprises not allocated for establishing the identity of the first LSP label.
  14. 14.根据权利要求11、12或13所述的装置,其特征在于, 所述第一通知报文用于通知所述第二PE避免向与所述第二PE相连的第二客户运营商中的设备分配用于建立第二LSP的标签,所述第二LSP为以所述第二客户运营商中的第二节点为起点、以所述第一节点为终点且经过所述第一LSP的LSP。 14. The apparatus of claim 11 or claim 13, wherein said first notification packet for notifying the second PE to avoid to the second client and the second operators connected to PE allocating a second device for establishing an LSP label, the second LSP to a second node is a client of the operator of the second starting point to the end point and the first node through the first LSP LSP.
  15. 15.如权利要求12-14任一项所述的装置,其特征在于,还包括:接收单元,用于通过标签分发协议LDP接收用于建立所述第一LSP的标签。 15. The apparatus of any one of claims 12-14, characterized in that, further comprising: receiving means for receiving through Label Distribution Protocol (LDP) for establishing the first LSP label.
  16. 16.如权利要求12-14所述的方法,其特征在于,所述控制单元具体用于: 将所述第一LSP对应的路由引入到边界网关协议BGP,以所述BGP的属性标识所述第一客户运营商没有给所述第一PE分配用于建立所述第一LSP的标签,并通过多协议网关协议MP-BGP将所述第一通知报文发布到所述第二PE。 16. The method according to claims 12-14, wherein said control unit is configured to: introducing the first LSP corresponding to the border gateway protocol BGP routing, to identify the attribute of the BGP the first customer operators did not give the first PE allocated to the development of the first LSP label, and through multi-protocol gateway protocol MP-BGP notification message will be the first to publish the second PE.
  17. 17.根据权利要求11所述的装置,其特征在于,确定单元具体用于: 当第一PE接收到用于建立所述第一LSP的标签,且所述第一LSP存在连通性故障时,确定所述第一LSP不可用。 17. The apparatus according to claim 11, wherein the determining unit is configured to: when the first PE for establishing the first LSP label is received, and the first LSP connectivity problems exist, determining a first LSP is unavailable.
  18. 18.根据权利要求11或17所述的方法,其特征在于,所述第一通知报文包括: 用于表示所述第一PE已被分配用于建立所述第一LSP的标签但所述第一LSP存在连通性故障的标识。 18. The method of claim 11 or 17, wherein the first notification message comprising: means for representing the first PE have been allocated for establishing the first LSP label but the identifying the presence of a first connectivity fault LSP.
  19. 19.根据权利要求11、17或18所述的装置,其特征在于, 所述第一通知报文用于通知所述第二PE撤销所述第二PE已经为与第二PE相连的第二客户运营商中的设备分配的用于建立第二LSP的标签,所述第二LSP为以第二客户运营商中的第二节点为起点、以所述第一节点为终点且经过所述第一LSP的LSP。 19. The second means 11, 17 or claim 18, wherein said first notification packet for notifying the second PE PE has withdrawn the second coupled with the second PE of client device assignment operator for establishing a second LSP in a label, the second LSP to a second client node to carriers as a starting point to the first point and passing through said second end a LSP of the LSP.
  20. 20.如权利要求11-19任一项所述的装置,其特征在于,所述控制单元具体用于: 将所述第一LSP对应的路由引入到边界网关协议BGP,以所述BGP的属性标识所述的第一客户运营商已经给所述第一PE分配第一PE分配用于建立所述第一LSP的标签并且但所述第一LSP存在连通性故障,并通过MP-BGP协议将所述第一通知报文发布到所述第二PE。 In the BGP attributes of the LSP into the first route corresponding to the border gateway protocol BGP,: 20. A device as claimed in claim any one of claims 11-19, wherein said control unit is configured to identifying the first client to the first operator has been assigned a first PE PE allocated for establishing the first LSP label and the presence, but the first LSP connectivity fault and through MP-BGP protocol the first notification message posted to the second PE.
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