CN107306222A

CN107306222A - The method and apparatus that traffic engineering tunnel on label switched path is set up

Info

Publication number: CN107306222A
Application number: CN201610261430.8A
Authority: CN
Inventors: 车佳; 王凤梅; 阴元斌
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2016-04-25
Filing date: 2016-04-25
Publication date: 2017-10-31
Anticipated expiration: 2036-04-25
Also published as: CN107306222B

Abstract

The invention discloses the method and apparatus that the traffic engineering tunnel on a kind of label switched path is set up.The embodiment of the present application provides the method and apparatus that a kind of TE over lsp tunnels are set up.This method includes：Forwarding unit receives the control message that domain controller is sent, and control message includes TE over lsp tunnels mark ID, enters label, outgoing label and outgoing interface mark；Forwarding unit sets up TE over lsp tunnels corresponding with TE over lsp tunnels ID according to control message, so that forwarding unit using TE over lsp tunnels when being E-Packeted, the instruction identified according to outgoing interface, is E-Packeted using traffic engineering tunnel or physical interface as outgoing interface.The technical scheme of the embodiment of the present application; different business can be directed to; the TE over lsp tunnels iterated in different traffic engineering tunnels are set up, carrying different business on different TE over lsp tunnels is forwarded, and can realize optimization and the service protection of resource.

Description

The method and apparatus that traffic engineering tunnel on label switched path is set up

Technical field

The invention relates to the communications field, and in particular to the traffic engineering on a kind of label switched path TE-over lsp tunnels set up method, forwarding unit, domain controller (Domain Controller, ) and cross-domain controller (Hierarchical Controller, HC) DC.

Background technology

Network interconnection agreement (Internet Protocol, referred to as " IP ") bearer network is usually multi-protocols mark Label exchange (Multi-Protocol Label Switching, referred to as " MPLS ") network.MPLS letters Change the processing to packet, improve the forward efficiency of packet.Traffic engineering based on MPLS The technology such as (Traffic Engineering, TE) and quick route protection, improves network service quality (Quality of Service, QoS).Especially, MPLS by multiple network integrations to one with ether Net (Ethernet) is in the infrastructure of framework so that the advantage of single forward mode obtains abundant body It is existing, effectively reduce network cost.When MPLS functions progressively extend to Access Layer from network core layer, Form seamless MPLS (Seamless MPLS) system.Seamless MPLS exists all business Access Layer carries out MPLS encapsulation, forms by core layer to metropolitan area layer, again to the unification of Access Layer MPLS control planes, significantly reduce the network planning and the difficulty safeguarded.Seamless MPLS is by controlling Layer and operation layer are constituted.Key-course mainly using Border Gateway Protocol (Border Gateway Protocol, BGP) interacted to carry out the routing iinformation between different zones, intermediate system is then used inside each region To intermediate system (Intermediate System-Intermediate System, IS-IS) agreement；Operation layer The different applications such as Virtual Private LAN Service (Virtual Private LAN Service, VPLS) are provided.

MPLS traffic engineerings (the MPLS that seamless MPLS is connected entirely in core layer and metropolitan area layer deployment Traffic Engineering, MPLS TE) tunnel；BGP label switching path (BGP is used between region Label Switch Path, BGP LSP) it is sticked together.But, in seamless MPLS schemes, In one mpls domain, for the LSP of identical next-hop, it is impossible to specify iteration specific for different LSP MPLS traffic engineering tunnels, so that for different business different MPLS traffic engineering tunnels can not be used to carry, It is unfavorable for the optimization of resource.

The content of the invention

Set up this application provides the traffic engineering TE-over lsp tunnels on a kind of label switched path Method, forwarding unit, domain controller DC and cross-domain controller HC, can be directed to different business, The TE-over lsp tunnels iterated in different traffic engineering tunnels are set up, in different TE-over LSP tunnels Different business are carried on road to be forwarded, and can realize optimization and the service protection of resource.

First aspect is built there is provided the traffic engineering TE-over lsp tunnels on a kind of label switched path Vertical method, this method includes：Forwarding unit receives the control message that domain controller DC is sent, described Control message includes TE-over lsp tunnels mark ID, enters label, outgoing label and outgoing interface mark, It is described enter label be TE-over LSP labels, the outgoing label be the TE-over LSP labels, institute Outgoing interface is stated to identify for indicating that the forwarding unit is forwarded using TE tunnel of traffic engineering or physical interface The message；The forwarding unit is set up and the TE-over lsp tunnels ID according to the control message Corresponding TE-over lsp tunnels, the forwarding unit is forwarded using the TE-over lsp tunnels During the message, the instruction identified according to the outgoing interface, with the traffic engineering tunnel or the physical interface The message is forwarded as outgoing interface.

The method that the TE-over lsp tunnels of the embodiment of the present application are set up, by domain controller to each forwarding The control message that equipment is sent, each forwarding unit can set up this according to corresponding control message TE-over lsp tunnels, so that forwarding unit is when using the TE-over lsp tunnels, can be with The instruction identified according to outgoing interface, is E-Packeted using traffic engineering tunnel or physical interface as outgoing interface.Also It is to say, borde gateway is not based on according to the TE-over lsp tunnels that the method for the embodiment of the present application is set up Agreement (Border Gateway Protocol, BGP) label, it is not necessary to which bgp protocol participates in tunnel Set up.Therefore, for different business, the TE-over iterated in different traffic engineering tunnels can be set up Lsp tunnel, on different TE-over lsp tunnels carrying different business is forwarded, to realize money The optimization in source and service protection.

In a kind of possible implementation, it is described that the outgoing interface mark indicates that the forwarding unit is used Traffic engineering tunnel forwards the message, and the forwarding unit is set up and the TE-over according to the control message The corresponding TE-over lsp tunnels of lsp tunnel ID, including：The forwarding unit is according to the control Message, by setting up the incidence relation of the TE-over lsp tunnels and the traffic engineering tunnel, sets up institute State TE-over lsp tunnels.

In a kind of possible implementation, it is described that the outgoing interface mark indicates that the forwarding unit is used Physical interface forwards the message, the forwarding unit according to the control message set up with it is described The corresponding TE-over lsp tunnels of TE-over lsp tunnels ID, including：The forwarding unit is according to institute Control message is stated, the network interconnection Protocol IP address of the next-hop node by setting up the forwarding unit The incidence relation of the physics outgoing interface of TE-over lsp tunnels during with the forwarding message, sets up The TE-over lsp tunnels.

In a kind of possible implementation, the forwarding unit receives the control that domain controller DC is sent Message, including：The forwarding unit receives DC passage paths computing unit (the Path Computation Element Protocol, PCEP) the tag update message PCLabelUpd Message in agreement send The control message.

In a kind of possible implementation, the PCLabelUpd Message set up class including path Type (Path Setup Type, PST) type lengths values TLV fields, the PST TLV fields include V fields indicate that type is set up for TE-over LSP in path.

In a kind of possible implementation, the PCLabelUpd Message also include Tag switching Path identifier LSP-IDENTIFIERS TLV fields, the LSP-IDENTIFIERS TLV words LSP id fields in section indicate the TE-over lsp tunnels ID, the LSP-IDENTIFIERS Tunnel Tunnel id fields in TLV fields indicate the ID of the traffic engineering tunnel, described Tunnel transmitting terminal address Tunnel Sender Address words in LSP-IDENTIFIERS TLV fields Section indicates the source address of the TE-over lsp tunnels, the LSP-IDENTIFIERS TLV fields In tunnel periproct dot address Tunnel Endpoint Address fields indicate the TE-over LSP tunnels The destination address in road.

In a kind of possible implementation, the PCLabelUpd Message also include outgoing interface Interface type Interface in OutInterface TLV fields, the OutInterface TLV fields The type field indicates that the interface type of the outgoing interface mark is physical interface or traffic engineering tunnel.

In a kind of possible implementation, when the Interface the type fields indicate the interface type During for physical interface, the interface identifier Interface id fields in the OutInterface TLV fields are IP address IpAddress fields in 0, and the OutInterface TLV fields indicate the forwarding The IP address of the next-hop node of equipment；

When it is traffic engineering tunnel that the Interface the type fields, which indicate the interface type, the Interface Id field includes the ID of traffic engineering tunnel, and the IpAddress fields are 0.

Second aspect is built there is provided the traffic engineering TE-over lsp tunnels on a kind of label switched path Vertical method, this method includes：First domain controller DC sends control message to forwarding unit, so that The forwarding unit sets up TE-over corresponding with TE-over lsp tunnels ID according to the control message Lsp tunnel, and make the forwarding unit when forwarding the message using the TE-over lsp tunnels, The instruction identified according to outgoing interface, institute is forwarded using TE tunnel of traffic engineering or physical interface as outgoing interface Message is stated, the control message includes TE-over lsp tunnels mark ID, enters label, outgoing label And outgoing interface mark, it is described enter label be TE-over LSP labels, the outgoing label is described TE-over LSP labels, the outgoing interface is identified for indicating that the forwarding unit uses the traffic engineering tunnel Or the physical interface forwards the message.

In a kind of possible implementation, send and control to forwarding unit in the first domain controller DC Before message processed, methods described also includes：First DC receives the tunnel that cross-domain controller HC is sent Request message is set up in road, and the tunnel building request message includes the TE-over lsp tunnels ID, institute The source address and destination address of TE-over lsp tunnels are stated, the source address and the destination address are net Network interconnection protocol IP address；First DC determines the control according to the tunnel building request message Message.

In a kind of possible implementation, the forwarding unit is Autonomous System Boundary Router, AS Boundary Router (Autonomous System Border Router, ASBR), in the first DC according to the tunnel Road is set up before request message determines the control message, and methods described also includes：First DC connects The 2nd DC is received to identify by the HC outgoing label sent and the outgoing interface；First DC Determine that the control disappears according to the outgoing label, outgoing interface mark and the tunnel building request message Breath.

In a kind of possible implementation, the tunnel building request message also enters label including described in The usable range of usable range and the outgoing label, wherein, it is described enter label usable range be used for determine It is described enter label, the usable range of the outgoing label is used to determine the outgoing label.

In a kind of possible implementation, the first domain controller DC sends to forwarding unit and controlled Message, including：Tag update message in the first DC passage paths computing unit PCEP agreements PCLabelUpd Message send the control message to the forwarding unit.

In a kind of possible implementation, the PCLabelUpd Message set up class including path Type path type type lengths values TLV fields, the V fields that the path type TLV fields include refer to Show that type is set up for TE-over LSP in path.

In a kind of possible implementation, the PCLabelUpd Message also include Tag switching Path identifier LSP-IDENTIFIERS TLV fields, the LSP-IDENTIFIERS TLV words LSP id fields in section indicate the TE-over lsp tunnels ID, the LSP-IDENTIFIERS Tunnel Tunnel id fields in TLV fields indicate the ID in the MPLS tunnels, described Tunnel transmitting terminal address Tunnel Sender Address words in LSP-IDENTIFIERS TLV fields Section indicates the source address of the TE-over lsp tunnels, the LSP-IDENTIFIERS TLV fields In tunnel periproct dot address Tunnel Endpoint Address fields indicate the TE-over LSP tunnels The destination address in road.

The third aspect is built there is provided the traffic engineering TE-over lsp tunnels on a kind of label switched path Vertical method, this method includes：The tunnel of TE-over lsp tunnels is set up in cross-domain controller HC generations Request message is set up, the tunnel building request message includes corresponding with the TE-over lsp tunnels TE-over lsp tunnels mark ID, the source address of the TE-over lsp tunnels and destination address, institute It is network interconnection Protocol IP address to state source address and the destination address；The HC is to domain controller DC The tunnel building request message is sent, in order to which the DC is true according to the tunnel building request message It is fixed and corresponding with TE-over lsp tunnels ID to forwarding unit transmission instruction forwarding unit foundation The control message of TE-over lsp tunnels, so that the forwarding unit is using the TE-over LSP When tunnel E-Packets, the instruction identified according to outgoing interface, with TE tunnel of traffic engineering or physical interface Forward the message as outgoing interface, the control message include TE-over lsp tunnels mark ID, Enter label, outgoing label and the outgoing interface mark, it is described enter label be TE-over LSP labels, institute Outgoing label is stated for the TE-over LSP labels, the outgoing interface is identified for indicating the forwarding unit The message is forwarded using the traffic engineering tunnel or the physical interface.

Fourth aspect is there is provided a kind of forwarding unit, any for performing first aspect or first aspect Method in possible implementation.Specifically, the forwarding unit includes being used to perform first aspect or the The unit of method in any possible implementation of one side.

5th aspect is there is provided a kind of domain controller, any for performing second aspect or second aspect Method in possible implementation.Specifically, the domain controller includes being used to perform second aspect or the The unit of method in any possible implementation of two aspects.

6th aspect is there is provided a kind of cross-domain controller, times for performing the third aspect or the third aspect Method in one possible implementation.Specifically, the cross-domain controller includes being used to perform the third aspect Or the unit of the method in any possible implementation of the third aspect.

7th aspect is there is provided a kind of forwarding unit, and the forwarding unit includes：Input interface, output connect Mouth, processor, memory, the input interface, output interface, the processor and memory it Between be connected by bus, the processor is used to perform code in the memory, when the code quilt During execution, the execution causes any possible implementation of computing device first aspect or first aspect In method.

Eighth aspect includes there is provided a kind of domain controller, the domain controller：Input interface, output connect Mouth, processor, memory, the input interface, output interface, the processor and memory it Between be connected by bus, the processor is used to perform code in the memory, when the code quilt During execution, the execution causes any possible implementation of computing device second aspect or second aspect In method.

9th aspect is there is provided a kind of cross-domain controller, and the cross-domain controller includes：It is input interface, defeated Outgoing interface, processor, memory, the input interface, output interface, the processor and storage It is connected between device by bus, the processor is used to perform the code in the memory, when the generation When code is performed, the execution causes any possible realization of the computing device third aspect or the third aspect Method in mode.

Tenth aspect is there is provided a kind of computer-readable medium, for storing computer program, the calculating Machine program includes being used to perform the method in any possible implementation of first aspect or first aspect Instruction.

Tenth one side is there is provided a kind of computer-readable medium, for storing computer program, the meter Calculation machine program includes being used to perform the side in any possible implementation of second aspect or second aspect The instruction of method.

12nd aspect is there is provided a kind of computer-readable medium, for storing computer program, the meter Calculation machine program includes being used to perform the side in any possible implementation of the third aspect or the third aspect The instruction of method.

Brief description of the drawings

Fig. 1 is software defined network SDN schematic architectural diagram.

Fig. 2 is showing for the method for the label switched path TE-over lsp tunnels foundation of the embodiment of the present application Meaning property flow chart.

Fig. 3 is the method for the label switched path TE-over lsp tunnels foundation of the application one embodiment Indicative flowchart.

Fig. 4 is that the schematic block diagram of type field is set up in the path of the embodiment of the present application.

Fig. 5 is the schematic block diagram of the outgoing interface field of the embodiment of the present application.

Fig. 6 is the method for the label switched path TE-over lsp tunnels foundation of the application one embodiment Indicative flowchart.

Fig. 7 is the schematic block diagram of the forwarding unit of the embodiment of the present application.

Fig. 8 is the domain controller DC of the embodiment of the present application schematic block diagram.

Fig. 9 is the cross-domain controller HC of the embodiment of the present application schematic block diagram.

Figure 10 is the schematic block diagram of the forwarding unit of the embodiment of the present application.

Figure 11 is the domain controller DC of the embodiment of the present application schematic block diagram.

Figure 12 is the cross-domain controller HC of the embodiment of the present application schematic block diagram.

Embodiment

Below in conjunction with the accompanying drawing in the embodiment of the present application, the technical scheme in the embodiment of the present application is carried out Description, it is clear that described embodiment is a part of embodiment of the application, rather than whole embodiments. Based on the embodiment in the application, those of ordinary skill in the art are not making the premise of creative work Lower obtained every other embodiment, should all belong to the scope of the application protection.

The application scenarios of the embodiment of the present application description are for more clear explanation the embodiment of the present application Technical scheme, does not constitute the restriction of the technical scheme provided the embodiment of the present application.The common skill in this area Art people understands, with the differentiation and the appearance of new business scene of the network architecture, what the embodiment of the present application was provided Technical scheme is same to adapt to for similar technical problem.

" TE-over lsp tunnels " described in the embodiment of the present application, refers to the stream on label switched path Measure engineering tunnel.When business carries out message forwarding using the TE-over lsp tunnels, the TE-over is used The traffic engineering tunnel or physical interface that lsp tunnel is specified during setting up forward outgoing interface as flow.

The scene of the embodiment of the present application is illustrated with reference to Fig. 1.

The core concept of software defined network (Software-Defined Network, SDN) be control and Carrying separation, by the way that the data surface and chain of command of network are separated, chain of command is independent, shape Into chain of command centralization, so as to break away from limitation of the hardware to the network architecture.Fig. 1 is to can apply to this Shen Please one embodiment SDN configuration diagrams.The chain of command of centralized management, such as Fig. 1 are included in SDN In SDN controllers 100；And data forwarding face, the interchanger 101 to 107 in such as Fig. 1.

In SDN, the service message of interchanger 102 is sent to by interchanger 101, its forward-path can Energy BGP LSP paths 11 as shown in Figure 1, the i.e. service message are successively through interchanger 101, exchange Machine 102 reaches interchanger 103.

When service message is forwarded, identical path can be specified for different service messages, for example can be right During 2 equal specified path 11 of service message 1 and service message.From interchanger 101 to interchanger 102 During forwarding service message, otherwise service message 1 and service message 2 are carried on MPLS traffic engineering tunnels 12 On, or it is carried on tunnel 13.That is, SDN controllers 100 can not be different industry Business specifies different MPLS traffic engineering tunnels carryings to carry out the traffic engineering of differentiation, is unfavorable for the excellent of resource Change and the protection of business.

Fig. 2 is the traffic engineering TE-over LSP tunnels on the label switched path according to the embodiment of the present application The indicative flowchart for the method that road is set up.

201, domain controller DC send control message to forwarding unit.The label that control message includes is handed over Change the mark of the traffic engineering TE-over lsp tunnels on path ID, enter label, outgoing label and outgoing interface Mark.

It is described enter label be TE-over LSP labels, the outgoing label be the TE-over LSP labels. Specifically, entering label is used for the label for indicating that the message that forwarding unit is forwarded the need for receiving is carried；Go out Label is used to indicate that forwarding unit message when sending message needs the label carried.Outgoing interface mark is used In instruction forwarding unit the message is forwarded using TE tunnel of traffic engineering or physical interface.

Traffic engineering tunnel can be MPLS traffic engineering tunnels, and the embodiment of the present application is not construed as limiting to this.

In the embodiment of the present application, forwarding unit can be the operator edge network equipment (Provider Edge, PE), Area Border Router (Area Border Router, ABR), autonomous system boundary road By device ASBR etc., the embodiment of the present application is not construed as limiting to this.

202, forwarding unit sets up TE-over corresponding with TE-over lsp tunnels ID according to control message Lsp tunnel, so that forwarding unit using TE-over lsp tunnels when being E-Packeted, according to outgoing interface The instruction of mark, is E-Packeted using traffic engineering tunnel or physical interface as outgoing interface.

Specifically, domain controller DC can be sent and forwarding unit to each connected forwarding unit Corresponding control message, for example, to PE send TE-over lsp tunnels ID, it is corresponding with PE enter Label and outgoing label and outgoing interface mark, TE-over lsp tunnels ID and ABR are sent to ABR It is corresponding enter label and outgoing label and outgoing interface mark.Each forwarding unit is according to corresponding control Message can set up the TE-over lsp tunnels, so that forwarding unit is using the TE-over LSP During tunnel, the instruction that can be identified according to outgoing interface is turned using traffic engineering tunnel or physical interface as outgoing interface Transmit messages text.

That is, the TE-over lsp tunnels set up according to the method for the embodiment of the present application are not based on Border Gateway Protocol (Border Gateway Protocol, BGP) label, it is not necessary to bgp protocol Participate in tunnel building.Therefore, for different business, it can set up and iterate in different traffic engineering tunnels TE-over lsp tunnels, on different TE-over lsp tunnels carrying different business is forwarded, To realize optimization and the service protection of resource.

Alternatively, the outgoing interface mark indicates that the forwarding unit is described using traffic engineering tunnel forwarding Message, the forwarding unit is set up and ID pairs of the TE-over lsp tunnels according to the control message The TE-over lsp tunnels answered, including：The forwarding unit is according to the control message, by setting up The incidence relation of the TE-over lsp tunnels and the traffic engineering tunnel, sets up the TE-over LSP Tunnel.

Specifically, in autonomous system, outgoing interface is designated traffic engineering tunnel, and forwarding unit can be set up The incidence relation of TE-over lsp tunnels and traffic engineering tunnel, and then set up TE-over lsp tunnels.Also It is to say, TE-over lsp tunnels is set up in traffic engineering tunnel.That is, for Forwarding plane, turn Equipment is sent out when being E-Packeted using TE-over lsp tunnels, the instruction that can be identified according to outgoing interface, E-Packeted using traffic engineering tunnel as outgoing interface.

Alternatively, the outgoing interface mark indicates that forwarding unit forwards the message, institute using physical interface State forwarding unit and set up corresponding with the TE-over lsp tunnels ID according to the control message TE-over lsp tunnels, including：The forwarding unit is forwarded according to the control message by setting up The TE-over when network interconnection Protocol IP address and the forwarding message of the next-hop node of equipment The incidence relation of the physics outgoing interface of lsp tunnel, sets up the TE-over lsp tunnels.

Specifically, between two autonomous systems, outgoing interface is designated the IP of the next-hop node of forwarding unit Address.Forwarding unit can be identified when being E-Packeted using TE-over lsp tunnels according to outgoing interface Instruction, E-Packeted using the IP address as outgoing interface.

In the embodiment of the present application, DC can control to set up the TE-over lsp tunnels in domain.Tie below Fig. 3 is closed, the process for setting up the TE-over lsp tunnels, which is illustrated, to be determined to DC.

As shown in figure 3, DC determines to set up TE-over lsp tunnels as depicted, the TE-over LSP The start node in tunnel is PE1, and source (PE1) IP address is 1.1.1.1；The TE-over lsp tunnels Tail node be, purpose (PE5) IP address be 2.2.2.2.DC distributes for the TE-over lsp tunnels TE-over lsp tunnel ID, for example, the TE-over lsp tunnels ID is 1.In Fig. 3, PE1, PE3, PE5~PE7, ABR1 and ABR2 in an autonomous system, wherein, PE1, PE3, ABR1 and ABR2 is located in same MPLS network, ABR1, ABR2 and PE5~PE7 In another MPLS network.DC respectively to PE1, ABR1 and ASBR1 send control message such as Under：

(a) DC is sent to PE1 control message：

TE-over LSP ID:1

Enter label Inlabel:NULL

Outgoing label Outlabel:3000

Outgoing interface Outinterface is identified:Tunnel Tunnel 21

(b) DC is sent to ABR1 control message：

TE-over LSP ID:1

Inlabel:3000

Outlabel:3001

Outinterface is identified:Tunnel 22

(c) DC is sent to PE5 control message：

TE-over LSP ID:1

Inlabel:3001

Outlabel:NULL

Outinterface is identified:NULL

Each forwarding unit can set up forwarding-table item according to above-mentioned control message, and set up and TE-over The corresponding TE-over lsp tunnels of lsp tunnel ID.The forwarding-table item includes the outgoing label, institute State into label and outgoing interface mark.The forwarding-table item can also include the TE-over LSP tunnels Road ID.

To carry Virtual Private Network (Virtual Private Network, VPN) on the TE-over lsp tunnels Exemplified by business, PE1 to PE5 message repeating process is illustrated, is described as follows：

Message is in PE1 successively packaging V RF labels, TE-over LSP labels 3000, TE-over LSP After tunnel label, it is forwarded to ABR1 (ABR1 is forwarded to by tunnel 21)；

ABR1 is received after message, TE-over lsp tunnel labels is ejected, by TE-over LSP labels 3001 are exchanged into by label 3000, then is pressed into TE-over lsp tunnel labels, ASBR1 is forwarded to (logical Cross tunnel 22 and be forwarded to PE5；

PE5 is received after message, successively ejection TE-over lsp tunnel labels, TE-over LSP labels, VRF labels, data destination is found according to VRF labels.So, VPN messages are completed in domain Transmission in TE-over lsp tunnels.

Alternatively, when domain controller DC is to forwarding unit transmission control message, it can be calculated with passage path Tag update message PCLabelUpd Message in unit PCEP agreements send the control message. PCLabelUpd Message forms are as follows：

Alternatively, the PCLabelUpd Message including path set up type (Path Setup Type, PST) type lengths values TLV fields, the V fields that the PST TLV fields include indicate that path is built Vertical type is TE-over LSP.

Specifically, PST TLV forms are as shown in figure 4, V fields include PST.Former PST value：

PST=0：For default value, expression passes through the RSVP based on Traffic Engineering extensions agreement The path that (Resource Reservation Protocol-TE) signaling protocol is set up.

Path is setup via RSVP-TE signaling protocol(default).。

PST=1：Represent section routing traffic engineering (Segment Routing-TE) SR-TE.

PST=2：Represent path-calculating element central controller basis (Path Computation Element Central Controller Basic, PCECC BASIC) label switching path LSP.

PST value can be newly defined in the embodiment of the present application.For example, PST=3 can be defined, to represent Type is built for TE-over LSP in path.It is of course also possible to define PST=4 and be to represent that type is built in path TE-over LSP, the embodiment of the present invention is not construed as limiting to this.

Alternatively, the PCLabelUpd Message also include label switched path identifier LSP ID in LSP-IDENTIFIERS TLV fields, the LSP-IDENTIFIERS TLV fields Field is indicated in the TE-over lsp tunnels ID, the LSP-IDENTIFIERS TLV fields Tunnel Tunnel id fields indicate the ID, the LSP-IDENTIFIERS TLV of the traffic engineering tunnel Tunnel transmitting terminal address Tunnel Sender Address fields in field indicate the TE-over LSP Tunnel periproct dot address in the source address in tunnel, the LSP-IDENTIFIERS TLV fields Tunnel Endpoint Address fields indicate the destination address of the TE-over lsp tunnels.

Specifically, the form of LSP-IDENTIFIERS TLV fields is constant, LSP-IDENTIFIERS TLV fields include LSP id fields, Tunnel id fields, Tunnel Sender Address fields with And Tunnel Endpoint Address fields.For example, as PST=3, LSP id fields represent TE-over Lsp tunnel ID, such as described TE-over LSP ID:1；Tunnel id fields represent the ID of traffic engineering tunnel, Such as above-mentioned Tunnel 21；Tunnel Sender Address fields represent the source of TE-over lsp tunnels Address, such as above-mentioned source address 1.1.1.1；Tunnel Endpoint Address fields represent TE-over LSP The destination address in tunnel, such as above-mentioned purpose address 2.2.2.2.

Alternatively, the PCLabelUpd Message also include outgoing interface OutInterface TLV fields, Interface type Interface the type fields in the OutInterface TLV fields indicate the outgoing interface The interface type of mark is physical interface or traffic engineering tunnel.

Alternatively, when it is physical interface that the Interface the type fields, which indicate the interface type, institute It is 0 to state the interface identifier Interface id fields in OutInterface TLV fields, and described IP address IpAddress fields in OutInterface TLV fields indicate the next of the forwarding unit The IP address of hop node；When the Interface the type fields indicate that the interface type is traffic engineering tunnel When, the Interface id fields include the ID of the traffic engineering tunnel, and the IpAddress fields It is set to 0.

Specifically, OutInterface TLV field formats are as shown in Figure 5.OutInterface TLV fields In V fields include Interface the type fields, Interface id fields and IpAddress fields. Interface the type fields are used for defining interface type.For example, when Interface the type fields are 1, It is physical interface that interface type, which can be represented, when Interface the type fields are 2, can represent interface Type is TE tunnel of traffic engineering.When Interface the type fields are 1, i.e., interface type is physics During interface, it is 0 that can define Interface id fields；When Interface the type fields are 2, i.e. interface When type is traffic engineering tunnel, the value that can define Interface id fields is the ID of traffic engineering tunnel.Also, When Interface the type fields are 1, IpAddress fields represent the next-hop node of the physical interface IP address；When IpAddress fields are 2, IpAddress fields are 0.

Alternatively, before 201, this method can also include：203, cross-domain controller HC generations The tunnel building request message of traffic engineering TE-over lsp tunnels on the label switched path of foundation, The tunnel building request message includes TE-over LSP tunnels corresponding with the TE-over lsp tunnels Road mark ID, the source address of the TE-over lsp tunnels and destination address, the source address and described Destination address is network interconnection Protocol IP address.

204, HC send the tunnel building request message to DC.

DC can include multiple DC, for example, can include the first DC and the 2nd DC.Specifically, DC Receive after the tunnel building request message, can determine that the control disappears according to the tunnel building request message Breath.Afterwards,

Alternatively, when forwarding unit is ASBR, in the first DC according to the tunnel building request message Determine before the control message, this method can also include：First DC receives the to the first DC Two DC are identified by the HC outgoing label sent and the outgoing interface；The first DC roots Determine that the control disappears according to the outgoing label, outgoing interface mark and the tunnel building request message Breath.

That is, when setting up cross-domain TE-over lsp tunnels, the ASBR being connected with the first DC Outgoing label be to enter label with the 2nd DC ASBR being connected.By HC forwarding, with first The ASBR of DC connections is known that outgoing label and outgoing interface.

Alternatively, tunnel building request message can also include it is described enter label usable range and it is described go out The usable range of label, wherein, it is described enter label usable range be used to determining it is described enter label, it is described The usable range of outgoing label is used to determine the outgoing label.That is, the first DC can according to enter mark The usable range of label and the usable range of outgoing label determine the outgoing label of forwarding unit and enter label.

With reference to Fig. 6, to the traffic engineering on the label switched path according to the embodiment of the present application The method that TE-over lsp tunnels are set up is described in detail.

The available label scope of 401, the HC each forwarding units of configuration.

Specifically, HC can with the available label scope of each forwarding unit of static configuration, can also and DC Consult the label range of forwarding unit, the application is not construed as limiting to this.

402, HC determine to set up a TE-over lsp tunnel, i.e. tunnel 40, distribution TE-over LSP Tunnel ID is 2, source address 1.1.1.1, destination address 3.3.3.3.

It should be noted that 401 can perform prior to 402,402 can also be first carried out, then perform 401, The application is not construed as limiting to this.

403, HC send tunnel building request message to DC1 and DC2.

Wherein, the tunnel building request message sent to DCI can include TE-over lsp tunnels ID With source address 1.1.1.1, TE-over LSP tunnels can be included by setting up request message to the DCI paths sent Road ID and destination address 3.3.3.3.

404, DC1 and DC2 determines control message according to tunnel building request message.

405, DC1 send control message corresponding with PE1 to PE1, are sent to ABR1 and ABR1 Corresponding control message；DC2 sends control message corresponding with PE2 to PE2, is sent to ASBR4 Control message corresponding with ASBR4.Particular content is as follows：

DC1 is sent to PE1 control message：

TE-over LSP ID:2

Inlabel:NULL

Outlabel:4000

Outinterface is identified:Tunnel 411

DC1 is sent to ABR1 control message：

TE-over LSP ID:2

Inlabel:4000

Outlabel:4001

Outinterface is identified:Tunnel 412

DC1 is sent to ASBR4 control message：

TE-over LSP ID:2

Inlabel:2000

Outlabel:1000

Outinterface is identified:Tunnel 413

DC1 is sent to PE2 control message：

TE-over LSP ID:2

Inlabel:1000

Outlabel:NULL

Outinterface is identified：NULL

406, for inter-domain path, i.e. ASBR1 to ASBR4 path, DC2 is by ASBR4's Enter label 2000 and be sent to HC.

407, HC generation ASBR1 path label table, is sent to DC1.Path label table includes： TE-over LSP ID:2nd, label and outgoing label are entered.

408, DC1 to the path for setting up ASBR1 to ASBR4.For domain-to-domain link, do not build generally Vertical tunnel, outgoing interface is appointed as physical interface, interface identifier for the next-hop of the forwarding unit IP Location.

DC1, which is sent to, gives ASBR1 contents：

TE-over LSP ID:1

Inlabel:4001

Outlabel:2000

Outinterface is identified:5.5.5.5

Outgoing interface mark 5.5.5.5 represents ASBR4 IP address.

To carry virtual private network on the TE-over lsp tunnels) exemplified by business, PE1 is arrived PE2 message repeating process carries out as described below：

Message is in PE1 successively packaging V RF labels, TE-over LSP labels 4000, TE-over LSP After tunnel label, it is forwarded to ABR1 (ABR1 is forwarded to by Tunnel 411)；

ABR1 receives rear message, TE-over lsp tunnel labels is ejected, by TE-over LSP labels 4001 are exchanged into by label 4000, then is pressed into TE-over lsp tunnel labels, passes through Tunnel 412 It is forwarded to ASBR1；

ASBR1 is received after message, TE-over lsp tunnel labels is ejected, by TE-over LSP labels 2000 are exchanged into by label 4001, is turned by outgoing interface Eth2/2/0 corresponding with IP address 5.5.5.5 It is sent to ASBR1；

ABR4 is received after message, TE-over lsp tunnel labels is ejected, by TE-over LSP labels 1000 are exchanged into by outgoing label 2000, then is pressed into TE-over lsp tunnel labels, passes through Tunnel 413 It is forwarded to PE2；

PE2 is received after message, successively ejection TE-over lsp tunnel labels, TE-over LSP labels, VRF labels, data destination is found according to VRF labels.So, VPN messages are completed cross-domain Transmission in TE-over lsp tunnels.

TE-over lsp tunnels end to end between the domain that the embodiment of the present application is set up, can be with each domain of iteration Traffic engineering tunnel.Specifically, it can exactly be iterated to for different business in different traffic engineering tunnels Realize traffic engineering end to end in face.Existing seamless MPLS can be overcome to be specified for different LSP The defect in iteration specific MPLS tunnel.And the embodiment of the present application is by using TE-over lsp tunnels The method that ID identifies tunnel so that the path end to end between 2 points does not use BGP public network IPs and built Vertical LSP, it is to avoid needed to use when multiple different LSP are set up under existing seamless MPLS scenario multiple The problem of public network IP address, it is to avoid the waste to public network IP address.

Above in conjunction with Fig. 1 to Fig. 6, to the flow on the label switched path according to the embodiment of the present application The method that engineering TE-over lsp tunnels are set up is described in detail, below in conjunction with Fig. 7 to Figure 12, Forwarding unit according to embodiments of the present invention, domain controller and cross-domain controller are described.

Fig. 7 shows the schematic block diagram of forwarding unit 500 according to embodiments of the present invention.Such as Fig. 7 institutes Show, the forwarding unit 500 includes receiving unit 510 and sets up unit 520.

Receiving unit 510, the control message for receiving domain controller DC transmissions, the control message Including the traffic engineering TE-over lsp tunnels mark ID on label switched path, enter label, outgoing label And outgoing interface mark, it is described enter label be TE-over LSP labels, the outgoing label is described TE-over LSP labels, the outgoing interface is identified for indicating that the forwarding unit uses traffic engineering TE Tunnel or physical interface forward the message；

Unit 520 is set up, for being set up and the TE-over lsp tunnels ID according to the control message Corresponding TE-over lsp tunnels, so that the forwarding unit is using the TE-over lsp tunnels When forwarding the message, the instruction identified according to the outgoing interface, with the traffic engineering tunnel or the physics Interface forwards the message as outgoing interface.

Alternatively, the outgoing interface mark indicates that the forwarding unit is described using traffic engineering tunnel forwarding Message, it is described set up unit 520 specifically for：According to the control message, by setting up the TE-over The incidence relation of lsp tunnel and the traffic engineering tunnel, sets up the TE-over lsp tunnels.

Alternatively, the outgoing interface mark indicates that the forwarding unit is described using physical interface forwarding Message, the unit specific 520 of setting up is used for：According to the control message, by setting up the forwarding The TE-over when network interconnection Protocol IP address and the forwarding message of the next-hop node of equipment The incidence relation of the physics outgoing interface of lsp tunnel, sets up the TE-over lsp tunnels.

Alternatively, the receiving unit 510 specifically for：Receive the DC passage paths computing unit The control message that tag update message PCLabelUpd Message in PCEP agreements are sent.

Alternatively, to set up type path type types including path long by the PCLabelUpd Message Angle value TLV fields, the V fields that the path type TLV fields include indicate that path sets up type and is TE-over LSP。

Alternatively, when it is physical interface that the Interface the type fields, which indicate the interface type, institute It is 0 to state the interface identifier Interface id fields in OutInterface TLV fields, and described IP address IpAddress fields in OutInterface TLV fields indicate the next of the forwarding unit The IP address of hop node；

Forwarding unit 500 according to embodiments of the present invention may correspond to according to embodiments of the present invention in label Forwarding unit in the method that traffic engineering TE-over lsp tunnels on switching path are set up.Also, Each unit and above-mentioned other operation and/or functions in forwarding unit 500 are respectively in order to realize in Fig. 2 by turning Send out each step that equipment is performed.For sake of simplicity, here is omitted.

Fig. 8 shows domain controller DC600 according to embodiments of the present invention schematic block diagram.Such as Fig. 8 Shown, the DC600 includes transmitting element 610.

Transmitting element 610, for forwarding unit send control message so that the forwarding unit according to The control message is set up corresponding with the traffic engineering TE-over lsp tunnels ID on label switched path TE-over lsp tunnels, and make the forwarding unit using the TE-over lsp tunnels forward During message, the instruction identified according to outgoing interface, using TE tunnel of traffic engineering or physical interface as going out to connect Mouthful forwarding message, the control message include TE-over lsp tunnels mark ID, enter label, Outgoing label and the outgoing interface mark, it is described enter label be TE-over LSP labels, the outgoing label For the TE-over LSP labels, the outgoing interface is identified for indicating that it is described that the forwarding unit is used Traffic engineering tunnel or the physical interface forward the message.

Alternatively, the DC also includes：Receiving unit 620, for receiving cross-domain controller HC hairs The tunnel building request message sent, the tunnel building request message includes the TE-over lsp tunnels ID, the source address of the TE-over lsp tunnels and destination address, the source address and the destination Location is network interconnection Protocol IP address；Determining unit 630, for according to the tunnel building request message Determine the control message.

Alternatively, the forwarding unit is Autonomous System Boundary Router, AS Boundary Router ASBR, the receiving unit 620 Be additionally operable to, receive the first DC receive the 2nd DC by the HC outgoing label sent and The outgoing interface mark；The determining unit 630 is additionally operable to, according to the outgoing label, the outgoing interface Mark and the tunnel building request message determine the control message.

Alternatively, the tunnel building request message also include it is described enter label usable range and it is described go out The usable range of label, wherein, it is described enter label usable range be used to determining it is described enter label, it is described The usable range of outgoing label is used to determine the outgoing label.

Alternatively, the transmitting element 610 has and is used for：In passage path computing unit PCEP agreements Tag update message PCLabelUpd Message send the control message to the forwarding unit.

Alternatively, when it is physical interface that the Interface the type fields, which indicate the interface type, institute It is 0 to state the interface identifier Interface id fields in OutInterface TLV fields, and described IP address IpAddress fields in OutInterface TLV fields indicate the next of the forwarding unit The IP address of hop node；When the Interface the type fields indicate that the interface type is traffic engineering tunnel When, the Interface id fields include the ID of traffic engineering tunnel, and the IpAddress fields are 0.

During domain controller DC600 according to embodiments of the present invention may correspond to according to embodiments of the present invention Domain controller DC in the method that traffic engineering TE-over lsp tunnels on label switched path are set up. Also, each unit and above-mentioned other operation and/or functions in domain controller DC600 are respectively in order to realize Each step performed in Fig. 2 by domain controller DC.For sake of simplicity, here is omitted.

Fig. 9 shows cross-domain controller HC700 according to embodiments of the present invention schematic block diagram.Such as Shown in Fig. 9, the HC700 includes generation unit 710 and transmitting element 720.

Generation unit 710, for generating the traffic engineering TE-over LSP set up on label switched path The tunnel building request message in tunnel, the tunnel building request message includes and the TE-over LSP The corresponding TE-over lsp tunnels mark ID in tunnel, the source address of the TE-over lsp tunnels and mesh Address, the source address and the destination address are network interconnection Protocol IP address；

Transmitting element 720, for sending the tunnel building request message to domain controller DC, so as to Determined and sent to forwarding unit in the DC to indicate forwarding unit according to the tunnel building request message The control message of TE-over lsp tunnels corresponding with TE-over lsp tunnels ID is set up, so that described Forwarding unit using the TE-over lsp tunnels when being E-Packeted, the instruction identified according to outgoing interface, The message, the control message bag are forwarded using TE tunnel of traffic engineering or physical interface as outgoing interface Include the TE-over lsp tunnels mark ID, enter label, outgoing label and outgoing interface mark, institute It is TE-over LSP labels to state into label, and the outgoing label is the TE-over LSP labels, described Outgoing interface is identified for indicating that the forwarding unit uses the traffic engineering tunnel or physical interface forwarding institute State message.

During cross-domain controller HC700 according to embodiments of the present invention may correspond to according to embodiments of the present invention Label switched path on traffic engineering TE-over lsp tunnels set up method in cross-domain controller HC.Also, each unit and above-mentioned other operation and/or functions in cross-domain controller HC700 are respectively Realize each step performed in Fig. 2 by cross-domain controller HC.For sake of simplicity, here is omitted.

Figure 10 is the schematic diagram of the forwarding unit of the embodiment of the present invention.Figure 10 forwarding unit 800 Including input interface 810, output interface 820, processor 830, memory 840, the input interface 810th, it is connected between output interface 820, the processor 830 and memory 840 by bus, institute Stating processor 830 is used to perform the code in the memory 840, when the code is performed, institute State processor 830 and realize the method performed in Fig. 2 by forwarding unit.The TE-over of the embodiment of the present application The method that lsp tunnel is set up, the control message sent by domain controller to each forwarding unit, each forwarding Equipment can set up the TE-over lsp tunnels according to corresponding control message, so that forwarding Equipment is when using the TE-over lsp tunnels, the instruction that can be identified according to outgoing interface, with TE tunnels Road or physical interface E-Packet as outgoing interface.That is, being built according to the method for the embodiment of the present application Vertical TE-over lsp tunnels be not based on Border Gateway Protocol (Border Gateway Protocol, BGP) label, it is not necessary to which bgp protocol participates in tunnel building.Therefore, for different business, The TE-over lsp tunnels iterated in different traffic engineering tunnels can be set up, in different TE-over LSP Carry different business on tunnel to be forwarded, to realize optimization and the service protection of resource.

Figure 11 is the domain controller DC900 of embodiment of the present invention schematic diagram.Figure 11 domain Controller DC900 includes input interface 910, output interface 920, processor 930, memory 940, Lead between the input interface 910, output interface 920, the processor 930 and memory 940 Cross bus to be connected, the processor 930 is used to perform the code in the memory 940, when the generation When code is performed, the processor 930 realizes the method performed in Fig. 2 by domain controller DC.

Figure 12 is the cross-domain controller HC1000 of embodiment of the present invention schematic diagram.Figure 12's Cross-domain controller HC1000 includes input interface 1010, output interface 1020, processor 1030, deposited Reservoir 1040, the input interface 1010, output interface 1020, the processor 1030 and storage It is connected between device 1040 by bus, the processor 1030 is used to perform in the memory 1040 Code, when the code is performed, the processor 1030 is realized in Fig. 2 by cross-domain controller The method that HC is performed.

Memory described in the embodiment of the present application can be but not limited to random access memory (RAM), read-only storage (ROM), Erasable Programmable Read Only Memory EPROM (EPROM), CD Read-only storage (CD-ROM), hard disk or magnetic disc etc. are various can be with Jie of storage program instruction code Matter, does not apply not being restricted this.

Processor described in the embodiment of the present application can be one or more CPU, CPU's In the case of, the CPU can be monokaryon CPU or multi-core CPU, and the application is not limited this System.

It should be understood that in present embodiments, term "and/or" is only a kind of description association pair The incidence relation of elephant, expression may have three kinds of relations, for example, A and/or B, can be represented：Individually There is A, while there is A and B, these three situations of individualism B.In addition, character "/" herein, It is a kind of relation of "or" to typically represent forward-backward correlation object.

The ordinal numbers such as " first ", " second " that the embodiment of the present application is referred to, unless based on context its is true The meaning of real order of representation, it should be understood that only play differentiation, this is not restricted.

It should be understood that in the various embodiments of the application, the size of the sequence number of above-mentioned each process is not intended to The priority of execution sequence, the execution sequence of each process should be determined with its function and internal logic, without answering Implementation process to the embodiment of the present application constitutes any limit.

Those of ordinary skill in the art are it is to be appreciated that with reference to each of the embodiments described herein description The unit and algorithm steps of example, can come real with electronic hardware, computer software or the combination of the two It is existing, in order to clearly demonstrate the interchangeability of hardware and software, in the above description according to function one As property describe the composition and step of each example.These functions are held with hardware or software mode actually OK, depending on the application-specific and design constraint of technical scheme.Professional and technical personnel can be to each It is specific to apply to realize described function using distinct methods, but this realization is it is not considered that super Go out scope of the present application.

It is apparent to those skilled in the art that, it is for convenience of description and succinctly, above-mentioned The specific work process of the system of description, device and unit, may be referred to pair in preceding method embodiment Process is answered, be will not be repeated here.

In several embodiments provided herein, it should be understood that disclosed system, device and Method, can be realized by another way.For example, device embodiment described above is only to show Meaning property, for example, the division of the unit, only a kind of division of logic function can when actually realizing To there is other dividing mode, such as multiple units or component can combine or be desirably integrated into another System, or some features can be ignored, or not perform.In addition, it is shown or discussed each other Coupling or direct-coupling or communication connection can be by the INDIRECT COUPLING of some interfaces, device or unit or Communication connection or electricity, mechanical or other forms are connected.

The unit illustrated as separating component can be or may not be it is physically separate, make It can be for the part that unit is shown or may not be physical location, you can with positioned at a place, Or can also be distributed on multiple NEs.Can select according to the actual needs part therein or Person's whole units realize the purpose of the embodiment of the present application scheme.

In addition, each functional unit in the application each embodiment can be integrated in a processing unit In or unit is individually physically present or two or more units are integrated in In one unit.Above-mentioned integrated unit can both be realized in the form of hardware, it would however also be possible to employ software The form of functional unit is realized.

If the integrated unit is realized using in the form of SFU software functional unit and is used as independent product pin Sell or in use, can be stored in a computer read/write memory medium.Understood based on such, The part that the technical scheme of the application substantially contributes to prior art in other words, or the technical side The all or part of case can be embodied in the form of software product, and the computer software product is stored in In one storage medium, including some instructions are to cause a computer equipment (can be individual calculus Machine, server, or network equipment etc.) perform whole or the portion of the application each embodiment methods described Step by step.And foregoing storage medium includes：USB flash disk, mobile hard disk, read-only storage (Read-Only Memory, abbreviation ROM), random access memory (Random Access Memory, referred to as RAM), magnetic disc or CD etc. are various can be with the medium of store program codes.

It is described above, the only embodiment of the application, but the protection domain of the application do not limit to In this, any one skilled in the art, can be easily in the technical scope that the application is disclosed Expect various equivalent modifications or substitutions, these modifications or substitutions should all cover the protection domain in the application Within.Therefore, the protection domain of the application should be defined by scope of the claims.

Claims

1. the method that the traffic engineering TE-over lsp tunnels on a kind of label switched path are set up, its It is characterised by, including：

Forwarding unit receives the control message that domain controller DC is sent, and the control message includes TE-over Lsp tunnel mark ID, enter label, outgoing label and outgoing interface mark, it is described enter label be TE-over LSP label, the outgoing label is the TE-over LSP labels, and the outgoing interface is identified for indicating The forwarding unit is E-Packeted using TE tunnel of traffic engineering or physical interface；

The forwarding unit sets up corresponding with the TE-over lsp tunnels ID according to the control message TE-over lsp tunnels, the forwarding unit is described using TE-over lsp tunnels forwarding During message, the instruction identified according to the outgoing interface, using the traffic engineering tunnel or the physical interface as Outgoing interface forwards the message.

2. the method as described in claim 1, it is characterised in that the outgoing interface is identified for indicating The forwarding unit forwards the message using the traffic engineering tunnel,

The forwarding unit sets up corresponding with the TE-over lsp tunnels ID according to the control message TE-over lsp tunnels, including：

The forwarding unit is according to the control message, by setting up the TE-over lsp tunnels and institute The incidence relation of traffic engineering tunnel is stated, the TE-over lsp tunnels are set up.

3. method as claimed in claim 1 or 2, it is characterised in that the outgoing interface, which is identified, to be used for Indicate that the forwarding unit forwards the message using the physical interface,

The forwarding unit is according to the control message, by the next-hop node for setting up the forwarding unit Network interconnection Protocol IP address and forward the physics of the TE-over lsp tunnels during message to go out The incidence relation of interface, sets up the TE-over lsp tunnels.

4. method as claimed any one in claims 1 to 3, it is characterised in that the forwarding is set The standby control message for receiving domain controller DC transmissions, including：

The forwarding unit receives the tag update in the DC passage paths computing unit PCEP agreements The control message that message PCLabelUpd Message are sent.

5. method as claimed in claim 4, it is characterised in that the PCLabelUpd Message Type path type type lengths values TLV fields, the path type TLV fields are set up including path Including V fields indicate that type is set up for TE-over LSP in path.

6. method as described in claim 5, it is characterised in that the PCLabelUpd Message Also include the interface class in outgoing interface OutInterface TLV fields, the OutInterface TLV fields Type Interface the type fields indicate that the interface type of the outgoing interface mark is physical interface or TE tunnels Road.

7. method as claimed in claim 6, it is characterised in that when the Interface the type fields When indicating the interface type for physical interface, the interface identifier in the OutInterface TLV fields Interface id fields are the IP address IpAddress in 0, and the OutInterface TLV fields Field indicates the IP address of the next-hop node of the forwarding unit；

8. the method that the traffic engineering TE-over lsp tunnels on a kind of label switched path are set up, its It is characterised by, including：

First domain controller DC sends control message to forwarding unit, so that the forwarding unit is according to institute State control message and set up TE-over lsp tunnels corresponding with TE-over lsp tunnels ID, and make described Forwarding unit using the TE-over lsp tunnels when being E-Packeted, the instruction identified according to outgoing interface, The message, the control message bag are forwarded using TE tunnel of traffic engineering or physical interface as outgoing interface Include the TE-over lsp tunnels mark ID, enter label, outgoing label and outgoing interface mark, institute It is TE-over LSP labels to state into label, and the outgoing label is the TE-over LSP labels, described Outgoing interface is identified for indicating that the forwarding unit uses the traffic engineering tunnel or physical interface forwarding institute State message.

9. method as claimed in claim 8, it is characterised in that in the first domain controller DC Before sending control message to forwarding unit, methods described also includes：

First DC receives the tunnel building request message that cross-domain controller HC is sent, the tunnel Setting up request message includes the TE-over lsp tunnels ID, the source of the TE-over lsp tunnels Location and destination address, the source address and the destination address are network interconnection Protocol IP address；

First DC determines the control message according to the tunnel building request message.

10. method as claimed in claim 9, it is characterised in that the forwarding unit is autonomous system Border router ASBR,

Before the first DC determines the control message according to the tunnel building request message, institute Stating method also includes：

First DC receives the 2nd DC by the HC outgoing label sent and described goes out to connect Mouth mark；

First DC disappears according to the outgoing label, outgoing interface mark and tunnel building request Breath determines the control message.

11. the method as any one of claim 8 to 10, it is characterised in that the tunnel Usable range and the usable range of the outgoing label that request message also enters label including described in are set up, its In, it is described enter label usable range be used to determining it is described enter label, the usable range of the outgoing label uses In it is determined that the outgoing label.

12. the method as any one of claim 8 to 11, it is characterised in that described first Domain controller DC sends control message to forwarding unit, including：

Tag update message in the first DC passage paths computing unit PCEP agreements PCLabelUpd Message send the control message to the forwarding unit.

13. method as claimed in claim 12, it is characterised in that the PCLabelUpd Message Type path type type lengths values TLV fields, the path type TLV fields are set up including path Including V fields indicate that type is set up for TE-over LSP in path.

14. method as described in claim 13, it is characterised in that the PCLabelUpd Message also includes in outgoing interface OutInterface TLV fields, the OutInterface TLV fields Interface type Interface the type fields indicate that the interface type of outgoing interface mark is physical interface Or traffic engineering tunnel.

15. method as claimed in claim 14, it is characterised in that when the Interface Type words When section indicates the interface type for physical interface, the interface mark in the OutInterface TLV fields It is the IP address in 0, and the OutInterface TLV fields to know Interface id fields IpAddress fields indicate the IP address of the next-hop node of the forwarding unit；

16. the method that the traffic engineering TE-over lsp tunnels on a kind of label switched path are set up, its It is characterised by, including：

The tunnel building request message of TE-over lsp tunnels is set up in cross-domain controller HC generations, described Tunnel building request message includes TE-over lsp tunnels mark corresponding with the TE-over lsp tunnels Know ID, the source address of the TE-over lsp tunnels and destination address, the source address and the purpose Address is network interconnection Protocol IP address；

The HC sends the tunnel building request message to domain controller DC, in order to the DC According to the tunnel building request message determine and to forwarding unit send indicate forwarding unit set up with The control message of the corresponding TE-over lsp tunnels of TE-over lsp tunnels ID, so that the forwarding is set It is standby when being E-Packeted using the TE-over lsp tunnels, the instruction identified according to outgoing interface, to flow Engineering traffic engineering tunnel or physical interface are measured as outgoing interface and forwards the message, the control message includes institute State TE-over lsp tunnels mark ID, enter label, outgoing label and the outgoing interface mark, it is described enter Label is TE-over LSP labels, and the outgoing label is the TE-over LSP labels, described to go out to connect Mouth is identified for indicating that the forwarding unit uses the traffic engineering tunnel or the physical interface forwarding report Text.

17. method as claimed in claim 16, it is characterised in that the tunnel building request message Also include it is described enter label usable range and the usable range of the outgoing label, wherein, it is described enter label Usable range be used to determining it is described enter label, the usable range of the outgoing label is used to determine the bid Label.

18. a kind of forwarding unit, it is characterised in that including：

Receiving unit, the control message for receiving domain controller DC transmissions, the control message includes On label switched path traffic engineering TE-over lsp tunnels mark ID, enter label, outgoing label and Outgoing interface identify, it is described enter label be TE-over LSP labels, the outgoing label be the TE-over LSP label, the outgoing interface identify for indicate the forwarding unit using TE tunnel of traffic engineering or Physical interface E-Packets；

Unit is set up, for being set up and ID pairs of the TE-over lsp tunnels according to the control message The TE-over lsp tunnels answered, the forwarding unit is forwarding institute using the TE-over lsp tunnels When stating message, the instruction identified according to the outgoing interface is made with the traffic engineering tunnel or the physical interface The message is forwarded for outgoing interface.

19. forwarding unit as claimed in claim 18, it is characterised in that the outgoing interface mark is used The message is forwarded using the traffic engineering tunnel in the instruction forwarding unit,

It is described set up unit specifically for：

According to the control message, by setting up the TE-over lsp tunnels and the traffic engineering tunnel Incidence relation, sets up the TE-over lsp tunnels.

20. the forwarding unit as described in claim 18 or 19, it is characterised in that the outgoing interface mark Know for indicating the forwarding unit using the physical interface forwarding message,

It is described set up unit specifically for：

According to the control message, assisted by setting up the network interconnection of next-hop node of the forwarding unit The association of the physics outgoing interface of TE-over lsp tunnels when discussing IP address and forwarding the message is closed System, sets up the TE-over lsp tunnels.

21. the forwarding unit as any one of claim 18 to 20, it is characterised in that described Receiving unit specifically for：

Receive the tag update message in the DC passage paths computing unit PCEP agreements The control message that PCLabelUpd Message are sent.

22. forwarding unit as claimed in claim 21, it is characterised in that the PCLabelUpd Message sets up type path type type lengths values TLV fields, the path type including path The V fields that TLV fields include indicate that type is set up for TE-over LSP in path.

23. the forwarding unit as described in claim 22, it is characterised in that the PCLabelUpd Message also includes in outgoing interface OutInterface TLV fields, the OutInterface TLV fields Interface type Interface the type fields indicate that the interface type of outgoing interface mark is physical interface Or traffic engineering tunnel.

24. forwarding unit as claimed in claim 23, it is characterised in that as the Interface Type When field indicates the interface type for physical interface, the interface in the OutInterface TLV fields It is the IP address in 0, and the OutInterface TLV fields to identify Interface id fields IpAddress fields indicate the IP address of the next-hop node of the forwarding unit；

25. a kind of domain controller DC, it is characterised in that including：

Transmitting element, for sending control message to forwarding unit, so that the forwarding unit is according to described Control message sets up TE-over lsp tunnels corresponding with TE-over lsp tunnels ID, and makes described turn Equipment is sent out when being E-Packeted using the TE-over lsp tunnels, the instruction identified according to outgoing interface, The message, the control message bag are forwarded using TE tunnel of traffic engineering or physical interface as outgoing interface Include the TE-over lsp tunnels mark ID, enter label, outgoing label and outgoing interface mark, institute It is TE-over LSP labels to state into label, and the outgoing label is the TE-over LSP labels, described Outgoing interface is identified for indicating that the forwarding unit uses the traffic engineering tunnel or physical interface forwarding institute State message.

26. DC as claimed in claim 25, it is characterised in that the DC also includes：

Receiving unit, for receiving the tunnel building request message that cross-domain controller HC is sent, the tunnel Request message is set up in road includes the TE-over lsp tunnels ID, the source of the TE-over lsp tunnels Address and destination address, the source address and the destination address are network interconnection Protocol IP address；

Determining unit, for determining the control message according to the tunnel building request message.

27. DC as claimed in claim 26, it is characterised in that the forwarding unit is autonomous system Border router ASBR,

The receiving unit is additionally operable to, and is received the 2nd DC of the first DC receptions and is sent out by the HC The outgoing label sent and outgoing interface mark；

The determining unit is additionally operable to, and is built according to the outgoing label, outgoing interface mark and the tunnel Vertical request message determines the control message.

28. the DC as any one of claim 25 to 27, it is characterised in that the tunnel Usable range and the usable range of the outgoing label that request message also enters label including described in are set up, its In, it is described enter label usable range be used to determining it is described enter label, the usable range of the outgoing label uses In it is determined that the outgoing label.

29. the DC as any one of claim 25 to 28, it is characterised in that the transmission Unit, which has, to be used for：

Tag update message PCLabelUpd Message in passage path computing unit PCEP agreements The control message is sent to the forwarding unit.

30. DC as claimed in claim 29, it is characterised in that the PCLabelUpd Message Type path type type lengths values TLV fields, the path type TLV fields are set up including path Including V fields indicate that type is set up for TE-over LSP in path.

31. the DC as described in claim 30, it is characterised in that the PCLabelUpd Message Also include the interface class in outgoing interface OutInterface TLV fields, the OutInterface TLV fields Type Interface the type fields indicate that the interface type of the outgoing interface mark is physical interface or TE tunnels Road.

32. DC as claimed in claim 31, it is characterised in that when the Interface Type words When section indicates the interface type for physical interface, the interface mark in the OutInterface TLV fields It is the IP address in 0, and the OutInterface TLV fields to know Interface id fields IpAddress fields indicate the IP address of the next-hop node of the forwarding unit；

33. a kind of cross-domain controller HC, it is characterised in that including：

Generation unit, for generating the traffic engineering TE-over lsp tunnels set up on label switched path Tunnel building request message, the tunnel building request message include and the TE-over lsp tunnels Corresponding TE-over lsp tunnels mark ID, the source address of the TE-over lsp tunnels and destination Location, the source address and the destination address are network interconnection Protocol IP address；

Transmitting element, for sending the tunnel building request message to domain controller DC, in order to institute DC is stated to be determined and sent to forwarding unit to indicate that forwarding unit is set up according to the tunnel building request message The control message of TE-over lsp tunnels corresponding with TE-over lsp tunnels ID, the control message Including TE-over lsp tunnels mark ID, enter label, outgoing label and outgoing interface mark, It is described enter label be TE-over LSP labels, the outgoing label be the TE-over LSP labels, institute Outgoing interface is stated to identify for indicating that the forwarding unit is forwarded using the traffic engineering tunnel or the physical interface The message.

34. HC as claimed in claim 33, it is characterised in that the tunnel building request message is also Including it is described enter label usable range and the usable range of the outgoing label, wherein, it is described enter label Usable range be used to determining it is described enter label, the usable range of the outgoing label is used to determine the bid Label.