CN103475557B - Tunnel setup method and router - Google Patents
Tunnel setup method and router Download PDFInfo
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- CN103475557B CN103475557B CN201310399870.6A CN201310399870A CN103475557B CN 103475557 B CN103475557 B CN 103475557B CN 201310399870 A CN201310399870 A CN 201310399870A CN 103475557 B CN103475557 B CN 103475557B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/64—Hybrid switching systems
- H04L12/6418—Hybrid transport
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Abstract
The invention provides a tunnel setup method and a router. The method includes the steps that a first ABR receives a first BGP label router published by a second ABR, a first BGP LSP from the first ABR to the second ABR is set up according to the first BGP label router, and a first MPLS TE tunnel from the first ABR to the second ABR is further set up according to the first BGP LSP. According to the technical scheme, when the first ABR and the second ABR need the MPLS TE tunnel to transmit services, the second ABR can publish the BGP label router to the first ABR, after the first ABR receives the BGP label router, the BGP LSP is set up, and the MPLS TE tunnel from the first ABR to the second ABR is further triggered and set up according to the BGP LSP, so that the MPLS TE tunnel can be set up automatically according to needs along with the services, and allocation efficiency of the MPLS TE tunnel is improved.
Description
Technical field
The present embodiments relate to the communications field is and in particular to a kind of method of tunnel building and router.
Background technology
Multiprotocol label switching（Multi-Protocol Label Switching, MPLS）Value in the wide area network is
Through being confirmed, and affect the Construction of Wide Area Network thinking of numerous service providers.MPLS simplifies the process to packet, carries
The high forward efficiency of packet；Traffic engineering based on MPLS（Traffic Engineering, TE）And quick route protection
Etc. technology, improve network service quality（Quality of Service, QoS）；Especially, multiple network integrations are arrived by MPLS
One with Ethernet（Ethernet）For in the infrastructure of framework so that the advantage of single forward mode finds full expression,
The cost benefit of network is also self-evident.When MPLS function progressively extends to Access Layer from network core layer, that is, define end
To the seamless MPLS in end（Seamless MPLS）System.All business are all carried out MPLS encapsulation in Access Layer by seamless MPLS, are formed
By core layer to metropolitan area layer, again to the unified MPLS control plane of Access Layer, significantly reduce the network planning and O＆M
Difficulty.Seamless MPLS is made up of key-course and operation layer.Key-course mainly adopts Border Gateway Protocol（Border Gateway
Protocol, BGP）Come to carry out the routing iinformation between zones of different interaction, each intra-zone then adopt intermediate system in
Between system（Intermediate System-Intermediate System, IS-IS）Agreement；Operation layer provides virtual private
LAN services（Virtual Private LAN Service, VPLS）Etc. different application.
Seamless MPLS is in core layer and the full MPLS traffic engineering connecting of metropolitan area layer deployment（MPLS Traffic
Engineering, MPLS TE）Tunnel；BGP label switching path is adopted between region（BGP Label Switch Path,
BGP LSP）It is sticked together.But MPLS traffic engineering tunnel typically adopts static manual collocation method, and typical MPLS
Traffic engineering tunnel needs about 10 orders.So lead to the efficiency of MPLS traffic engineering tunnel configuration low, and configuration amount is big, easily malfunctions
And not easy care；When business granting changes, MPLS traffic engineering tunnel can not change automatically with business development, lacks motility.
Content of the invention
Embodiments provide a kind of method of tunnel building and router, to solve MPLS traffic engineering tunnel configuration effect
The low problem of rate.
A kind of first aspect, there is provided method of tunnel building, including：First area border router（Area Border
Router, ABR）Receive the first BGP label route that the 2nd ABR issues；A described ABR is according to described first BGP label road
By the BGP LSP setting up a described ABR to described 2nd ABR；A described ABR is according to a described BGP LSP wound
Build a MPLS traffic engineering tunnel of a described ABR to described 2nd ABR.
In conjunction with described in a first aspect, in the first possible implementation of described first aspect, a described ABR to
Described 2nd ABR issues the second BGP label route, so that described 2nd ABR is according to described second BGP label Route establishment
2nd ABR is to the 2nd BGPLSP of a described ABR, and is created from described 2nd ABR according to described 2nd BGP LSP further
The 2nd MPLS traffic engineering tunnel to a described ABR.
In conjunction with described in a first aspect, in the possible implementation of the second of described first aspect, a described ABR to
Described 2nd ABR sends tunnel notice message, and described tunnel notice message includes the tunnel letter of a described MPLS traffic engineering tunnel
Breath, so that described 2nd ABR creates described 2nd ABR to described first according to the tunnel information of a described MPLS traffic engineering tunnel
The 3rd MPLS traffic engineering tunnel of ABR, described 3rd MPLS traffic engineering tunnel and a described MPLS traffic engineering tunnel are two-way road tunnel altogether.
In conjunction with any one possible implementation above-mentioned of described first aspect or described first aspect, additionally provide institute
State the third possible implementation of first aspect, in the third possible implementation of described first aspect, described
First ABR is after creating a described MPLS traffic engineering tunnel, if a described BGP LSP is revoked and a described BGP
When LSP is the unique BGP LSP associating with described first mpls-te tunnel, delete a described MPLS traffic engineering tunnel.
In conjunction with the possible implementation of the second of described first aspect, in the 4th kind of possible reality of described first aspect
In existing mode, a described ABR is mapped to described 2nd ABR with bgp update UPDATE message or tag distribution protocol LDP
The form of Mapping message sends described tunnel notice message.
Possible in conjunction with the 4th kind of the possible implementation of the second of described first aspect or described first aspect
Implementation, additionally provides the 5th kind of possible implementation of described first aspect, and the 5th kind in described first aspect can
In the implementation of energy, described tunnel information includes：The Tunnel Identifier of extension, Tunnel Identifier and tunnel endpoint addresses.
A kind of second aspect, there is provided method of tunnel building, including：2nd ABR generates the first BGP label route；Institute
State the 2nd ABR and issue described first BGP label route to a described ABR, so that a described ABR is according to a described BGP
Label routing sets up a BGP LSP of a described ABR to described 2nd ABR, and further according to a described BGP LSP
Create a MPLS traffic engineering tunnel of a described ABR to described 2nd ABR.
In conjunction with described second aspect, in the first possible implementation of described second aspect, described 2nd ABR connects
Receive the second BGP label route that a described ABR issues；Described 2nd ABR is according to described second BGP label Route establishment
2nd ABR to the 2nd BGPLSP of a described ABR；Described 2nd ABR creates described second according to described 2nd BGP LSP
ABR is to the 2nd MPLS traffic engineering tunnel of a described ABR.
In conjunction with the first possible implementation of described second aspect, in the possible reality of the second of described second aspect
In existing mode, described 2nd ABR is after creating described 2nd MPLS traffic engineering tunnel, if described 2nd BGP LSP is revoked
And described 2nd BGP LSP is when being the unique BGP LSP associating with described 2nd MPLS traffic engineering tunnel, delete described 2nd MPLS
Traffic engineering tunnel.
In conjunction with the first possible implementation of described second aspect, in the third possible reality of described second aspect
In existing mode, described 2nd ABR receives the tunnel notice message that a described ABR sends, and described tunnel notice message includes institute
State the tunnel information of a MPLS traffic engineering tunnel；Described 2nd ABR, according to the tunnel information of a described MPLS traffic engineering tunnel, obtains
The routing information of a described MPLS traffic engineering tunnel；Described 2nd ABR, according to the routing information of a described MPLS traffic engineering tunnel, adopts
Create the 3rd MPLS traffic engineering tunnel of described 2nd ABR to a described ABR, described 3rd MPLS TE tunnel with explicit path mode
Road and a described MPLS traffic engineering tunnel are two-way road tunnel altogether.
In conjunction with the third possible implementation of described second aspect, in the 4th kind of possible reality of described second aspect
In existing mode, described tunnel information includes：The Tunnel Identifier of extension, Tunnel Identifier and tunnel endpoint addresses.
A kind of third aspect a, there is provided ABR, including：Receiving unit, for receiving the BGP that the 2nd ABR issues
Label routing；Processing unit, for the of an ABR according to described first BGP label Route establishment to described 2nd ABR
One BGP LSP, and a MPLS of a described ABR to described 2nd ABR is created further according to a described BGP LSP
Traffic engineering tunnel.
In conjunction with the described third aspect, in the first possible implementation of the described third aspect, a described ABR is also
Including transmitting element, for issuing the second BGP label route to described 2nd ABR, so that described 2nd ABR is according to described second
2nd ABR described in BGP label Route establishment to the 2nd BGP LSP of a described ABR, and further according to described 2nd BGP
LSP creates the 2nd MPLS traffic engineering tunnel of described 2nd ABR to a described ABR.
In conjunction with the described third aspect, in the possible implementation of the second of the described third aspect, a described ABR is also
Including transmitting element, for sending tunnel notice message to described 2nd ABR, described tunnel notice message includes described first
The tunnel information of MPLS traffic engineering tunnel, so that described 2nd ABR creates institute according to the tunnel information of a described MPLS traffic engineering tunnel
State the 2nd ABR to the 3rd MPLS traffic engineering tunnel of a described ABR, described 3rd MPLS traffic engineering tunnel and a described MPLS TE
Tunnel is two-way road tunnel altogether.
In conjunction with any one possible implementation above-mentioned of the described third aspect or the described third aspect, additionally provide institute
State the third possible implementation of the third aspect, in the third possible implementation of the described third aspect, described
Processing unit, is additionally operable to after creating a described MPLS traffic engineering tunnel, if a described BGP LSP is revoked and institute
When to state a BGP LSP be the unique BGP LSP associating with a described MPLS traffic engineering tunnel, delete a described MPLS TE tunnel
Road.
A kind of fourth aspect, there is provided 2nd ABR, including：Signal generating unit, for generating the first BGP label route；Send
Unit, for issuing described first BGP label route to a described ABR, so that a described ABR is according to a described BGP
Label routing sets up a BGP LSP of a described ABR to described 2nd ABR, and further according to a described BGP LSP
Create a MPLS traffic engineering tunnel of a described ABR to described 2nd ABR.
In conjunction with described fourth aspect, in the first possible implementation, described 2nd ABR also includes：Receiving unit,
For receiving the second BGP label route that a described ABR issues；Processing unit, for according to described second BGP label route
Set up the 2nd BGP LSP of described 2nd ABR to a described ABR, and further according to described 2nd BGP LSP creates
2nd ABR is to the 2nd MPLS traffic engineering tunnel of a described ABR.
In conjunction with the first possible implementation of described fourth aspect, in the possible reality of the second of described fourth aspect
In existing mode, described processing unit, it is additionally operable to after creating described 2nd MPLS traffic engineering tunnel, if described 2nd BGP
When LSP is revoked and described 2nd BGP LSP is the unique BGP LSP associating with described 2nd MPLS traffic engineering tunnel, delete described
2nd MPLS traffic engineering tunnel.
In conjunction with described fourth aspect, in the third possible implementation of described fourth aspect, described 2nd ABR is also
Including：Receiving unit, for receiving the tunnel notice message that a described ABR sends, described tunnel notice message includes described
The tunnel information of the first MPLS traffic engineering tunnel；Processing unit, for the tunnel information according to a described MPLS traffic engineering tunnel, obtains
The routing information of a described MPLS traffic engineering tunnel, and the routing information according to a described MPLS traffic engineering tunnel further, adopt
Explicit path mode creates the 3rd MPLS traffic engineering tunnel of described 2nd ABR to a described ABR, described 3rd MPLS traffic engineering tunnel
It is two-way road tunnel altogether with a described MPLS traffic engineering tunnel.
In conjunction with the third possible implementation of described fourth aspect, in the 4th kind of possible reality of described fourth aspect
In existing mode, described tunnel information includes：The Tunnel Identifier of extension, Tunnel Identifier and tunnel endpoint addresses.
It can be seen that, by technical scheme provided in an embodiment of the present invention, when ABR to the 2nd ABR needs using MPLS TE
During tunnel transmission business, the 2nd ABR can issue BGP label route to an ABR, and an ABR is receiving BGP label route
Afterwards, set up BGP LSP, and trigger the MPLS TE tunnel creating ABR to the 2nd ABR further according to BGP LSP
Road, can make MPLS traffic engineering tunnel automatically set up on demand with business, and improve the allocative efficiency of MPLS traffic engineering tunnel.
Brief description
In order to be illustrated more clearly that the technical scheme of the embodiment of the present invention, will make to required in the embodiment of the present invention below
Accompanying drawing be briefly described it should be apparent that, drawings described below is only some embodiments of the present invention, for
For those of ordinary skill in the art, on the premise of not paying creative work, other can also be obtained according to these accompanying drawings
Accompanying drawing.
Fig. 1 is the schematic flow sheet of the method for tunnel deployment of one embodiment of the invention.
Fig. 2 is the schematic flow sheet of the method for tunnel deployment of another embodiment of the present invention.
Fig. 3 is the schematic flow diagram of the process of tunnel deployment of another embodiment of the present invention.
Fig. 4 is the schematic flow diagram of the process of tunnel deployment of another embodiment of the present invention.
Fig. 5 is the schematic flow diagram of the process of tunnel deployment of another embodiment of the present invention.
Fig. 6 is the schematic diagram of the tunnel encapsulation attribute of one embodiment of the invention.
Fig. 7 is the schematic diagram of the tunnel information of one embodiment of the invention.
Fig. 8 is the schematic flow diagram of the process of tunnel deployment of another embodiment of the present invention.
Fig. 9 is the structural representation of the first area border router of one embodiment of the invention.
Figure 10 is the structural representation of the second area border router of another embodiment of the present invention.
Figure 11 is the structural representation of the first area border router of another embodiment of the present invention.
Figure 12 is the structural representation of the second area border router of another embodiment of the present invention.
Specific embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Site preparation describes it is clear that described embodiment is a part of embodiment of the present invention, rather than whole embodiments.Based on this
Embodiment in bright, the every other reality that those of ordinary skill in the art are obtained on the premise of not making creative work
Apply example, all should belong to the scope of protection of the invention.
Fig. 1 is the schematic flow sheet of the method for the tunnel building of one embodiment of the invention.Method shown in Fig. 1 includes：
101, an ABR receive the first BGP label route that the 2nd ABR issues.
102, an ABR are according to a BGP of this first BGP label Route establishment the first ABR to the 2nd ABR
LSP.
103, an ABR creates a MPLS TE tunnel of ABR to the 2nd ABR according to a BGP LSP
Road.
It can be seen that, by technical scheme provided in an embodiment of the present invention, when ABR to the 2nd ABR needs using MPLS TE
During tunnel transmission business, the 2nd ABR can issue BGP label route to an ABR, and an ABR is receiving BGP label route
Afterwards, set up BGP LSP, and trigger the MPLS TE tunnel creating ABR to the 2nd ABR further according to BGP LSP
Road, can make MPLS traffic engineering tunnel automatically set up on demand with business, and improve the allocative efficiency of MPLS traffic engineering tunnel.
In the embodiment of the present invention, a BGP LSP is with an ABR as Ingress node（Ingress）, with this second
ABR is Egress node（Egress）.First MPLS traffic engineering tunnel is with an ABR as Ingress node（Ingress）, with this
Two ABR are Egress node（Egress）.
Alternatively, as an embodiment, the method shown in Fig. 1 also includes：First ABR issues the to the 2nd ABR
Two BGP label routes, so that the 2nd ABR is according to the of this second BGP label Route establishment the 2nd ABR to the ABR
Two BGP LSP, and the 2nd MPLS traffic engineering tunnel of the 2nd ABR to the ABR is created further according to the 2nd BGP LSP.
So as to realize the foundation of the reverse MPLS traffic engineering tunnel to described 2nd ABR for the described ABR, complete an ABR and
The establishment of bidirectional tunnel end to end between 2nd ABR, and then can be used to carry between an ABR and the 2nd ABR
Such as pseudo-wire（Pseudo Wire, PW）Deng business.
In the embodiment of the present invention, the 2nd BGP LSP with the 2nd ABR as Ingress, with an ABR as Egress.
2nd MPLS traffic engineering tunnel with the 2nd ABR as Ingress, with an ABR as Egress.
Alternatively, as another embodiment, the method shown in Fig. 1 also includes：First ABR sends to the 2nd ABR
Tunnel notice message, this tunnel notice message includes the tunnel information of a MPLS traffic engineering tunnel so that the 2nd ABR according to
The tunnel information of the first MPLS traffic engineering tunnel creates the 3rd MPLS traffic engineering tunnel of the 2nd ABR to the ABR, and the 3rd
MPLS traffic engineering tunnel and a MPLS traffic engineering tunnel are two-way road tunnel altogether.Specifically, create a MPLS in an ABR
After traffic engineering tunnel, it is not detected by the MPLS TE with the 2nd ABR to the ABR on the common road of a MPLS traffic engineering tunnel
During tunnel, an ABR sends this tunnel notice message to the 2nd ABR, and this tunnel notice message includes a MPLS TE
The tunnel information in tunnel.Wherein, the 3rd MPLS traffic engineering tunnel and a MPLS traffic engineering tunnel are that two-way road tunnel altogether is specially:
The direction of the 3rd MPLS traffic engineering tunnel and a MPLS traffic engineering tunnel is contrary, and the 3rd MPLS traffic engineering tunnel and should
The path of the first MPLS traffic engineering tunnel is consistent.That is, two tunnels in opposite direction with same paths can claim
For being two-way road tunnel altogether.
Alternatively, as another embodiment, the method shown in Fig. 1 also includes：First ABR create this first
After MPLS traffic engineering tunnel, if a BGP LSP is revoked and a BGP LSP is to close with a MPLS traffic engineering tunnel
During unique BGP LSP of connection, delete a MPLS traffic engineering tunnel.So just achieve MPLS traffic engineering tunnel automatic on demand with business
Delete, bandwidth resources can be saved.
Alternatively, as another embodiment, this tunnel notice message is bgp update（UPDATE）Message or label distribution
Agreement（Label Distribution Protocol, LDP）Mapping（Mapping）Message.
Alternatively, as another embodiment, an ABR also can by other means to the 2nd ABR send this
The tunnel information of one MPLS traffic engineering tunnel, the present invention is not construed as limiting to this.
Alternatively, as another embodiment, this tunnel information includes Tunnel Identifier, Tunnel Identifier and the tunnel end extending
Dot address.
In seamless MPLS scenario, regional is responsible for the route connection in respective region, will not dispose MPLS TE in advance
Tunnel.When ABR to the 2nd ABR needs to transmit for business using MPLS traffic engineering tunnel, the 2nd ABR can be to an ABR
Send BGP label route, an ABR, after receiving BGP label route, sets up BGP LSP, and further according to BGP LSP
To trigger the MPLS traffic engineering tunnel creating ABR to the 2nd ABR, MPLS traffic engineering tunnel can be made automatically to set up on demand with business,
And improve the allocative efficiency of MPLS traffic engineering tunnel.
Fig. 2 is the schematic flow sheet of the method for the tunnel building of another embodiment of the present invention.Method bag shown in Fig. 2
Include：
201, the 2nd ABR generate the first BGP label route.
202, the 2nd ABR to an ABR issue this first BGP label route so that an ABR according to this first
The first BGP LSP of BGP label Route establishment the ABR to the 2nd ABR, and created according to a BGP LSP further
Build a MPLS traffic engineering tunnel of ABR to the 2nd ABR.
It can be seen that, by technical scheme provided in an embodiment of the present invention, when ABR to the 2nd ABR needs using MPLS TE
During tunnel transmission business, the 2nd ABR can issue BGP label route to an ABR, and an ABR is receiving BGP label route
Afterwards, set up BGP LSP, and trigger the MPLS TE tunnel creating ABR to the 2nd ABR further according to BGP LSP
Road, can make MPLS traffic engineering tunnel automatically set up on demand with business, and improve the allocative efficiency of MPLS traffic engineering tunnel.
Alternatively, as an embodiment, the method also includes：2nd ABR receives second that an ABR issues
BGP label route.2nd ABR is according to the 2nd BGP of this second BGP label Route establishment the 2nd ABR to the ABR
LSP.2nd ABR creates the 2nd MPLS traffic engineering tunnel of the 2nd ABR to the ABR according to the 2nd BGP LSP.
Alternatively, as another embodiment, the method also includes：2nd ABR is creating the 2nd MPLS TE tunnel
After road, if the 2nd BGP LSP is revoked and the 2nd BGP LSP is unique with what the 2nd MPLS traffic engineering tunnel associated
During BGP LSP, delete the 2nd MPLS traffic engineering tunnel.So just achieve MPLS traffic engineering tunnel to be automatically deleted on demand with business, energy
Enough save bandwidth resources.
Alternatively, as an embodiment, the method also includes：The tunnel that 2nd ABR receives an ABR transmission leads to
Accuse message, this tunnel notice message includes the tunnel information of a MPLS traffic engineering tunnel.2nd ABR is according to a MPLS
The tunnel information of traffic engineering tunnel, obtains the routing information of this first mpls-te tunnel.2nd ABR is according to a MPLS TE tunnel
The routing information in road, creates the 3rd MPLS traffic engineering tunnel of the 2nd ABR to the ABR using explicit path mode, and the 3rd
MPLS traffic engineering tunnel and a MPLS traffic engineering tunnel are two-way road tunnel altogether.Wherein, the 3rd MPLS traffic engineering tunnel and this first
MPLS traffic engineering tunnel is that two-way road tunnel altogether refers to, the direction of the 3rd MPLS traffic engineering tunnel and a MPLS traffic engineering tunnel is phase
Anti-, and the 3rd mpls-te tunnel is consistent with the path of a MPLS traffic engineering tunnel.That is, having identical
Two tunnels in opposite direction in path can be known as two-way road tunnel altogether.
Alternatively, as another embodiment, this tunnel information includes Tunnel Identifier, Tunnel Identifier and the tunnel end extending
Dot address.
Fig. 3 is the schematic flow diagram of the process of the tunnel building of another embodiment of the present invention.
303, the 2nd ABR 302 generate the first BGP label route.
Alternatively, as an embodiment, when ABR 301 to the 2nd ABR 302 needs to use using MPLS traffic engineering tunnel
When the business of transmission, the 2nd ABR 302 can generate the first BGP label route, and the prefix part of this first BGP label route is permissible
Address for the 2nd ABR or other routing address in the 2nd ABR place domain, the present invention is not construed as limiting to this.
Alternatively, as an embodiment, this business can be virtual private network in second layer network（Layer 2Virtual
Private Network, L2VPN）, can be three layer virtual private network（Layer 3 Virtual Private
Network, L3VPN）, can also be PW, the present invention is not construed as limiting to this.And this service needed such as LSP or traffic engineering tunnel
Transmission channel carried.
304, the 2nd ABR 302 issue this first BGP label route to an ABR 301.
305, an ABR 301 receive this first BGP label route after, set up an ABR301 to this second
The first BGP LSP of ABR 302.
306, an ABR 301 create the of an ABR the 301 to the 2nd ABR 302 according to a BGP LSP
One MPLS traffic engineering tunnel.
It can be seen that, by technical scheme provided in an embodiment of the present invention, when ABR to the 2nd ABR needs using MPLS TE
During tunnel transmission business, the 2nd ABR can issue BGP label route to an ABR, and an ABR is receiving BGP label route
Afterwards, set up BGP LSP, and trigger the MPLS TE tunnel creating ABR to the 2nd ABR further according to BGP LSP
Road, can make MPLS traffic engineering tunnel automatically set up on demand with business, and improve the allocative efficiency of MPLS traffic engineering tunnel.
Alternatively, as an embodiment, within step 306, an ABR 301 is after setting up a BGP LSP,
First ABR 301 creates a MPLS traffic engineering tunnel of an ABR the 301 to the 2nd ABR 302.Specifically, in step 306
In, an ABR 301, after establishing a BGP LSP, sends RSVP to the 2nd ABR 302
（Resource Reservation Protocol, RSVP）Path（PATH）Message.2nd ABR 302 receives this RSVP
The backward ABR 301 of PATH message returns RSVP reservation（RESV）Message.First ABR 301 is receiving this RSVP
A MPLS traffic engineering tunnel of an ABR the 301 to the 2nd ABR 302 is created after RESV message.
Alternatively, as another embodiment, an ABR 301 step 306 create a MPLS traffic engineering tunnel it
Afterwards, if a BGP LSP is revoked and a BGP LSP is the unique BGP associating with a MPLS traffic engineering tunnel
During LSP, delete a MPLS traffic engineering tunnel.Specifically, this first BGP label route constantly can refresh with business change, namely
First BGP LSP also can constantly refresh.When the 2nd ABR 302 does not issue a BGP of refreshing in predetermined time period
Label routing, and when a BGP LSP is the unique BGP LSP associating with a MPLS traffic engineering tunnel, an ABR
The MPLS traffic engineering tunnel that 301 deletions have created.So just achieve MPLS traffic engineering tunnel to be automatically deleted on demand with business, energy
Enough save bandwidth resources.
Alternatively, as another embodiment, after step 306, as shown in figure 4, this process can also include：
407, an ABR 301 generate the second BGP label route.
Alternatively, as an embodiment, when the 2nd ABR 302 to the ABR 301 needs to pass using MPLS traffic engineering tunnel
When sending business, an ABR 301 can generate the second BGP label route.
Alternatively, as an embodiment, this business can be L2VPN, can be L3VPN, can also be PW, the present invention
This is not construed as limiting.And the transmission channel of this service needed such as LSP or traffic engineering tunnel is carried.
408, an ABR 301 issue this second BGP label route to the 2nd ABR 302.
409, the 2nd ABR 302 receive this second BGP label route after, set up the 2nd ABR302 to this first
The 2nd BGP LSP of ABR 301.
410, the 2nd ABR 302 create the of the 2nd ABR the 302 to the ABR 301 according to the 2nd BGP LSP
Two MPLS traffic engineering tunnels.
Alternatively, as an embodiment, in step 410, the 2nd ABR 302 is after setting up the 2nd BGP LSP,
2nd ABR 302 creates the 2nd MPLS traffic engineering tunnel of the 2nd ABR the 302 to the ABR 301.Specifically, in step 410
In, the 2nd ABR 302, after establishing the 2nd BGP LSP, sends RSVP PATH message to an ABR 301.Should
First ABR 301 receives backward 2nd ABR 302 of this RSVP PATH message and returns RSVP RESV message.2nd ABR
302 the 2nd MPLS TE tunnels creating the 2nd ABR the 302 to the ABR 301 after receiving this RSVP RESV message
Road.
Alternatively, as another embodiment, the 2nd ABR 302 step 410 create the 2nd MPLS traffic engineering tunnel it
Afterwards, if the 2nd BGP LSP is revoked and the 2nd BGP LSP is the unique BGP associating with the 2nd MPLS traffic engineering tunnel
During LSP, delete the 2nd MPLS traffic engineering tunnel.So just achieve MPLS traffic engineering tunnel to be automatically deleted on demand with business, Neng Goujie
Bandwidth-saving resource.
It should be noted that in the embodiment of the present invention establishment of the 2nd MPLS traffic engineering tunnel and this first mpls-te tunnel establishment
When separate, both do not interdepend.So, the embodiment of the present invention passes through the BGP of the BGP label Route establishment of issue
LSP creates required MPLS traffic engineering tunnel to trigger.After two-way BGP LSP sets up respectively, triggering is created end-to-end
Two-way MPLS traffic engineering tunnel.
Fig. 5 is the schematic flow diagram of the process of the tunnel building of another embodiment of the present invention.
503, the 2nd ABR 502 generate the first BGP label route.
Specifically, when ABR 501 to the 2nd ABR 502 needs to be used for transmitting business using MPLS traffic engineering tunnel, the
Two ABR 502 can generate the first BGP label route.Business in the embodiment of the present invention can be L2VPN, can be L3VPN, also
Can be PW, the present invention is not construed as limiting to this.And the transmission channel of this service needed such as LSP or traffic engineering tunnel is held
Carry.
504, the 2nd ABR 502 issue this first BGP label route to an ABR 501.
505, an ABR 501 receive this first BGP label route after, set up an ABR501 to this second
The first BGP LSP of ABR 502.
506, an ABR 501 create the of an ABR the 501 to the 2nd ABR 502 according to a BGP LSP
One MPLS traffic engineering tunnel.
Alternatively, as an embodiment, if there is ABR 501 to the 2nd ABR before step 506
502 existing MPLS traffic engineering tunnel, then an ABR 501 after setting up this BGP LSP, by this existing MPLS traffic engineering tunnel
Replace with a MPLS traffic engineering tunnel.
507, after a MPLS traffic engineering tunnel creates, common with a MPLS traffic engineering tunnel without having detected
During the MPLS traffic engineering tunnel of the 2nd ABR the 502 to the ABR 501 on road, an ABR 501 is to the 2nd ABR 502
Send tunnel notice message, this tunnel notice message includes the tunnel information of a MPLS traffic engineering tunnel.
Alternatively, as an embodiment, this tunnel notice message is BGP UPDATE message or LDP Mapping disappears
Breath.
Alternatively, as another embodiment, an ABR also can send this tunnel to the 2nd ABR by other means
Road notice message, the present invention is not construed as limiting to this.
Alternatively, as an embodiment, Tunnel Identifier that the tunnel information of a MPLS traffic engineering tunnel includes extending,
Tunnel Identifier and tunnel endpoint addresses.The Tunnel Identifier of this extension includes tunnel type and tunnel title.
Alternatively, as an embodiment, this tunnel advertised information passes through " the Tunnel Encapsulation in agreement
Attribute（Tunnel encapsulation attribute）" carry and transmitted, as shown in fig. 6, tunnel encapsulation attribute include one set type-length-
Value（Type-Length-Value, TLV）Encoded radio.Wherein tunnel type（Tunnel Type）Field is 2 eight bit bytes
（Octets）, length（Length）Field is 2 eight bit bytes, value（Value）Field can carry the specifically interior of this tunnel information
Hold, as shown in fig. 7, wherein：
The Tunnel Identifier of extension（Extended Tunnel ID）, for carrying the mark of a described ABR；
Tunnel Identifier（Tunnel ID）, for identifying a described MPLS traffic engineering tunnel；
Tunnel endpoint addresses（Tunnel End Point Address）, for identifying a described MPLS traffic engineering tunnel
Destination address, i.e. the address of described 2nd ABR.
This Extended Tunnel ID, Tunnel ID and Tunnel End Point Address are used for unique mark
A described MPLS traffic engineering tunnel.
Alternatively, as another embodiment, this tunnel type is 8, the entitled RSVP-TELSP in this tunnel, is shown in Table 1 institute
Show.It should be noted that the tunnel type 8 in the embodiment of the present invention is only a schematic example, this tunnel-like offset really by
The Internet numbering distributor gear（Internet Assigned Numbers Authority, IANA）The tunnel type of distribution is compiled
Code value, can be any one value from 8 to 65535, and the present invention is not construed as limiting to this.
Table 1
| Tunnel type | Tunnel title |
| 8 | RSVP-TE LSP（RSVP-Traffic Engineering Label exchange agreement） |
508, the 2nd ABR 502, according to the tunnel information of a MPLS traffic engineering tunnel, obtain a MPLS TE tunnel
The routing information in road.
Alternatively, as an embodiment, after the 2nd ABR 502 receives this tunnel notice message, identify tunnel-like
Type is indicated for this MPLS traffic engineering tunnel to determine this tunnel information.For example, as shown in table 1 one, the 2nd ABR
502 identify that tunnel type is 8, determine its tunnel entitled RSVP-TE LSP, then the 2nd ABR 502 according to this first
The tunnel information of MPLS traffic engineering tunnel, specifically, the 2nd ABR 502 searches in the tunnel information of a MPLS traffic engineering tunnel
Tunnel Identifier and traffic engineering database（Traffic Engineering DataBase, TEDB）To obtain a MPLS
The routing information of traffic engineering tunnel.
509, the 2nd ABR 502, according to the routing information of a MPLS traffic engineering tunnel, are created using explicit path mode
The 3rd MPLS traffic engineering tunnel of the 2nd ABR the 502 to the ABR401, the 3rd MPLS traffic engineering tunnel and a MPLS TE
Tunnel is two-way road tunnel altogether.Wherein, the 3rd MPLS traffic engineering tunnel and a MPLS traffic engineering tunnel are that two-way road tunnel altogether is
Refer to, the direction of the 3rd MPLS traffic engineering tunnel and a MPLS traffic engineering tunnel is contrary, and the 3rd MPLS traffic engineering tunnel and
The path of the first MPLS traffic engineering tunnel is consistent.That is, having two tunnels in opposite direction of same paths
It is known as two-way road tunnel altogether.
It can be seen that, by technical scheme provided in an embodiment of the present invention, when ABR to the 2nd ABR needs using MPLS TE
During tunnel transmission business, the 2nd ABR can issue BGP label route to an ABR, and an ABR is receiving BGP label route
Afterwards, set up BGP LSP, and trigger the MPLS TE tunnel creating ABR to the 2nd ABR further according to BGP LSP
Road, can make MPLS traffic engineering tunnel automatically set up on demand with business, and improve the allocative efficiency of MPLS traffic engineering tunnel.
Alternatively, as an embodiment, an ABR 501 after step 506 creates this first mpls-te tunnel,
If a BGP LSP is revoked and a BGP LSP is the unique BGP LSP associating with a MPLS traffic engineering tunnel
When, delete a MPLS traffic engineering tunnel.Specifically, this first BGP label route constantly can refresh with business change, namely should
First BGP LSP also can constantly refresh.When the 2nd ABR 502 does not issue a BGP mark of refreshing in predetermined time period
Sign route, and when a BGP LSP is the unique BGP LSP associating with a MPLS traffic engineering tunnel, an ABR 501
Delete the MPLS traffic engineering tunnel having created.So, just achieve the deletion on demand of MPLS traffic engineering tunnel.
So, the embodiment of the present invention is by triggering MPLS by the BGP LSP of the BGP label Route establishment related to business
Traffic engineering tunnel create it is achieved that automatically the setting up on demand with business of MPLS traffic engineering tunnel, and each section of MPLS traffic engineering tunnel has
The reverse MPLS traffic engineering tunnel on strict two-way altogether road therewith.
Fig. 8 is the schematic flow diagram of the process of the tunnel building of another embodiment of the present invention.In the embodiment of the present invention
Step 803 can be found in step 503 in aforementioned Fig. 5 to 506 to 806, and the step 813 in the embodiment of the present invention can be found in 815
Step 507 in aforementioned Fig. 5, to 509, for avoiding repeating, repeats no more here.
803, the 2nd ABR 802 generate the first BGP label route.
Specifically, when ABR 801 to the 2nd ABR 802 needs to be used for transmitting business using MPLS traffic engineering tunnel, the
Two ABR 802 can generate the first BGP label route.Business in the embodiment of the present invention can be L2VPN, can be L3VPN, also
Can be PW, the present invention is not construed as limiting to this.And the transmission channel of this service needed such as LSP or traffic engineering tunnel is held
Carry.
804, the 2nd ABR 802 issue this first BGP label route to an ABR 801.
After 805, an ABR 801 receive this first BGP label route, set up an ABR 801 arrive this second
The first BGP LSP of ABR 802.
806, an ABR 801 create the of an ABR the 801 to the 2nd ABR 802 according to a BGP LSP
One MPLS traffic engineering tunnel.
Alternatively, as an embodiment, if there is ABR 801 to the 2nd ABR before step 806
802 existing MPLS traffic engineering tunnel, then an ABR 801 after setting up this BGP LSP, by this existing MPLS traffic engineering tunnel
Replace with a MPLS traffic engineering tunnel.
807, after a MPLS traffic engineering tunnel creates, if detected and the common road of a MPLS traffic engineering tunnel
During the existing MPLS traffic engineering tunnel of the 2nd ABR the 802 to the ABR 801, this existing MPLS traffic engineering tunnel is defined as the 3rd
MPLS traffic engineering tunnel.And the 3rd MPLS traffic engineering tunnel altogether road two-way with a MPLS traffic engineering tunnel.
808, an ABR 801 are after creating a MPLS traffic engineering tunnel, if a BGP LSP is removed
A pin and BGP LSP is when being the unique BGP LSP associating with a MPLS traffic engineering tunnel, deletes a MPLS TE tunnel
Road.
809, an ABR 801 generate the second BGP label route.
Specifically, when the 2nd ABR 802 to the ABR 801 needs to be used for transmitting business using MPLS traffic engineering tunnel, to
First ABR 801 applying label, a now ABR 801 generation the first BGP label route.Business in the embodiment of the present invention can
To be L2VPN, can be L3VPN, can also be PW, the present invention is not construed as limiting to this.And this service needed such as LSP or
The transmission channel of traffic engineering tunnel is carried.
810, an ABR 801 issue this second BGP label route to the 2nd ABR 802.
After 811, the 2nd ABR 802 receive this second BGP label route, set up the 2nd ABR 802 arrive this first
The 2nd BGP LSP of ABR 801.
The 3rd MPLS traffic engineering tunnel that step 807 is created is replaced by 812, the 2nd ABR 802 according to the 2nd BGP LSP
For the 4th MPLS traffic engineering tunnel.
Specifically, after the 2nd ABR 802 sets up the 2nd BGP LSP, detected the presence of the 2nd ABR 802 and arrived this
After the 3rd MPLS traffic engineering tunnel of the first ABR 801, the 3rd MPLS traffic engineering tunnel is replaced with and is created according to the 2nd BGP LSP
The 2nd ABR the 802 to the ABR 801 the 4th MPLS traffic engineering tunnel.Wherein, the 4th MPLS traffic engineering tunnel with this
Two ABR 802 are Ingress, with an ABR 801 as Egress.
813, the 2nd ABR 802 send tunnel notice message to an ABR 801, and this tunnel notice message includes this
The tunnel information of the 4th MPLS traffic engineering tunnel.
Alternatively, as another embodiment, this tunnel notice message is BGP UPDATE message or LDP Mapping disappears
Breath.
Alternatively, as another embodiment, the 2nd ABR 802 also can be by other means to an ABR 801
Send the tunnel information of a MPLS traffic engineering tunnel, the present invention is not construed as limiting to this.
Alternatively, as an embodiment, Tunnel Identifier that the tunnel information of the 4th MPLS traffic engineering tunnel includes extending,
Tunnel Identifier and tunnel endpoint addresses.The Tunnel Identifier of wherein this extension includes tunnel type and tunnel title.
Alternatively, as another embodiment, the tunnel type in the Tunnel Identifier of this extension is 8, and this tunnel is entitled
RSVP-TE LSP, is shown in Table 1.It should be noted that the tunnel type 8 in the embodiment of the present invention is only a schematic example, should
The tunnel type encoded radio that tunnel-like offset is really distributed by IANA, can be any one value from 8 to 65535, this
Invention is not construed as limiting to this.
After 814, an ABR 801 are according to this tunnel notice message receiving, according to the 4th MPLS TE therein
The tunnel information in tunnel, obtains the routing information of the 4th MPLS traffic engineering tunnel.
815, an ABR 801, according to the routing information of the 4th MPLS traffic engineering tunnel, are created using explicit path mode
The 5th MPLS traffic engineering tunnel of the first ABR the 801 to the 2nd ABR 802, the 5th MPLS traffic engineering tunnel and the 4th MPLS
Traffic engineering tunnel is two-way road tunnel altogether.
It can be seen that, by technical scheme provided in an embodiment of the present invention, when ABR to the 2nd ABR needs using MPLS TE
During tunnel transmission business, the 2nd ABR can issue BGP label route to an ABR, and an ABR is receiving BGP label route
Afterwards, set up BGP LSP, and trigger the MPLS TE tunnel creating ABR to the 2nd ABR further according to BGP LSP
Road, can make MPLS traffic engineering tunnel automatically set up on demand with business, and improve the allocative efficiency of MPLS traffic engineering tunnel.
Fig. 9 is the structural representation of an ABR 900 of one embodiment of the invention.An ABR 900 shown in Fig. 9 wraps
Include receiving unit 901 and processing unit 902.
Receiving unit 901, for receiving the first BGP label route that the 2nd ABR issues.Processing unit 902, for basis
The first BGP LSP of this first BGP label Route establishment the first ABR to the 2nd ABR, and further according to a BGP
LSP creates a MPLS traffic engineering tunnel of ABR to the 2nd ABR.
It can be seen that, by technical scheme provided in an embodiment of the present invention, when ABR 900 to the 2nd ABR needs to use
During MPLS traffic engineering tunnel transmission business, the 2nd ABR can issue BGP label route to an ABR 900, and an ABR 900 is connecing
After receiving BGP label route, set up BGP LSP, and trigger establishment the ABR 900 further according to BGP LSP and arrive this
The MPLS traffic engineering tunnel of the 2nd ABR, can make MPLS traffic engineering tunnel automatically set up on demand with business, and improves MPLS TE tunnel
The allocative efficiency in road.
First ABR 900 is capable of each process in the embodiment of Fig. 1 to Fig. 6 by an ABR execution, for avoiding weight
Multiple, repeat no more here.
Alternatively, as an embodiment, an ABR 900 also includes transmitting element 903, for the 2nd ABR
Issue second BGP label route so that the 2nd ABR according to this second BGP label Route establishment the 2nd ABR to this first
The 2nd BGP LSP of ABR, and the 2nd MPLS of the 2nd ABR to the ABR is created further according to the 2nd BGP LSP
Traffic engineering tunnel.
Alternatively, as another embodiment, this transmitting element 903, it is additionally operable to send tunnel and notice to the 2nd ABR disappear
Breath, this tunnel notice message includes the tunnel information of a MPLS traffic engineering tunnel, so that the 2nd ABR is according to a MPLS
The tunnel information of traffic engineering tunnel creates the 3rd MPLS traffic engineering tunnel of the 2nd ABR to the ABR, the 3rd MPLS traffic engineering tunnel and
First MPLS traffic engineering tunnel is two-way road tunnel altogether.Specifically, after an ABR creates a MPLS traffic engineering tunnel,
When being not detected by the MPLS traffic engineering tunnel with the 2nd ABR to the ABR on the common road of a MPLS traffic engineering tunnel, to this
2nd ABR sends this tunnel notice message.
Alternatively, as another embodiment, processing unit 902 be additionally operable to create this first mpls-te tunnel it
Afterwards, if a BGP LSP is revoked and a BGP LSP is the unique BGP associating with a MPLS traffic engineering tunnel
During LSP, delete a MPLS traffic engineering tunnel.
Figure 10 is the structural representation of the 2nd ABR 1000 of one embodiment of the invention.The 2nd ABR shown in Figure 10
1000 include signal generating unit 1001 and transmitting element 1002.
Signal generating unit 1001, for generating the first BGP label route.Transmitting element 1002, should for issuing to an ABR
First BGP label route, so that an ABR is according to this first BGP label Route establishment the first ABR to the 2nd ABR's
First BGP LSP, and a MPLS TE tunnel of ABR to the 2nd ABR is created further according to a BGP LSP
Road.
It can be seen that, by technical scheme provided in an embodiment of the present invention, when ABR to the 2nd ABR 1000 needs to use
During MPLS traffic engineering tunnel transmission business, the 2nd ABR 1000 can issue BGP label route to an ABR, and an ABR is receiving
To after BGP label route, set up BGP LSP, and trigger establishment the first ABR to the 2nd ABR further according to BGP LSP
1000 MPLS traffic engineering tunnel, can make MPLS traffic engineering tunnel automatically set up on demand with business, and improve MPLS traffic engineering tunnel
Allocative efficiency.
2nd ABR 1000 is capable of each process realized in the embodiment of Fig. 1 to Fig. 6 by the 2nd ABR, for avoiding
Repeat, repeat no more here.
Alternatively, as an embodiment, the 2nd ABR 1000 also includes receiving unit 1003 and processing unit 1004.
Receiving unit 1003, for receiving the second BGP label route that an ABR issues.Processing unit 1004, is used for
According to the 2nd BGP LSP of this second BGP label Route establishment the 2nd ABR to the ABR, and further according to this second
BGP LSP creates the 2nd MPLS traffic engineering tunnel of the 2nd ABR to the ABR.
Alternatively, as another embodiment, this processing unit 1004, it is additionally operable to creating the 2nd MPLS TE tunnel
After road, if the 2nd BGP LSP is revoked and the 2nd BGP LSP is unique with what the 2nd MPLS traffic engineering tunnel associated
During BGP LSP, delete the 2nd MPLS traffic engineering tunnel.
Alternatively, as another embodiment, this receiving unit 1003, it is additionally operable to receive the tunnel that an ABR sends
Notice message, this tunnel notice message includes the tunnel information of a MPLS traffic engineering tunnel.Processing unit 1004 according to this first
The tunnel information of MPLS traffic engineering tunnel, obtains the routing information of this first mpls-te tunnel, and further according to a MPLS
The routing information of traffic engineering tunnel, creates the 3rd MPLS traffic engineering tunnel of the 2nd ABR to the ABR using explicit path mode, and
And the 3rd MPLS traffic engineering tunnel and a MPLS traffic engineering tunnel be two-way road tunnel altogether.
Alternatively, as another embodiment, this tunnel information includes：The Tunnel Identifier of extension, Tunnel Identifier and tunnel
End-point addresses.
Figure 11 is the structural representation of an ABR 1100 of one embodiment of the invention.First ABR 1100 of Figure 11 wraps
Include processor 1101, memorizer 1102, receiving circuit 1103 and transtation mission circuit 1104.
Receiving circuit 1103 receives the first BGP label route that the 2nd ABR issues.Processor 1101 is according to a BGP
Label routing sets up a BGP LSP of ABR to the 2nd ABR, and further should according to a BGP LSP establishment
First mpls-te tunnel of the first ABR to the 2nd ABR.
It can be seen that, by technical scheme provided in an embodiment of the present invention, when ABR 1100 to the 2nd ABR needs to use
During MPLS traffic engineering tunnel transmission business, the 2nd ABR can issue BGP label route to an ABR 1100, and an ABR 1100 exists
After receiving BGP label route, set up BGP LSP, and trigger establishment the first ABR 1100 further according to BGP LSP and arrive
The MPLS traffic engineering tunnel of the 2nd ABR, can make MPLS traffic engineering tunnel automatically set up on demand with business, and improve MPLS TE
The allocative efficiency in tunnel.
Each assembly in first ABR 1100 is coupled by bus system 1105, and wherein bus system 1105 is removed
Outside data/address bus, also include power bus, controlling bus and status signal bus in addition.But for the sake of clear explanation,
In fig. 11 various buses are all designated as bus system 1105.
The method that the embodiments of the present invention disclose can apply in processor 1101, or real by processor 1101
Existing.Processor 1101 is probably a kind of IC chip, has the disposal ability of signal.During realizing, said method
Each step can be completed by the instruction of the integrated logic circuit of the hardware in processor 1101 or software form.Above-mentioned
Processor 1101 can be general processor, digital signal processor（Digital Signal Processor, DSP）, special
Integrated circuit（Application Specific Integrated Circuit, ASIC）, ready-made programmable gate array（Field
Programmable Gate Array, FPGA）Or other PLDs, discrete gate or transistor logic,
Discrete hardware components.Can realize or execute disclosed each method in the embodiment of the present invention, step and logic diagram.General
Processor can be microprocessor or this processor can also be any conventional processor etc..In conjunction with embodiment of the present invention institute
The step of disclosed method can be embodied directly in hardware decoding processor execution and complete, or with the hardware in decoding processor
And software module combination execution completes.Software module may be located at random access memory, and flash memory, read only memory are programmable read-only
In the ripe storage medium in this area such as memorizer or electrically erasable programmable memory, depositor.This storage medium is located at
Memorizer 1102, processor 1101 reads the information in memorizer 1102, the step completing said method in conjunction with its hardware.
First ABR 1100 is capable of each process realized in the embodiment of Fig. 1 to Fig. 6 by an ABR, for avoiding
Repeat, repeat no more here.
Alternatively, as an embodiment, transtation mission circuit 1104 is used for issuing the second BGP label route to the 2nd ABR,
So that the 2nd ABR, according to the 2nd BGP LSP of this second BGP label Route establishment the 2nd ABR to the ABR, goes forward side by side
One step creates the 2nd MPLS traffic engineering tunnel of the 2nd ABR to the ABR according to the 2nd BGP LSP.
Alternatively, as another embodiment, transtation mission circuit 1104 is used for creating a MPLS TE in an ABR
After tunnel, it is not detected by the MPLS TE tunnel with the 2nd ABR to the ABR on the common road of a MPLS traffic engineering tunnel
During road, send tunnel notice message to the 2nd ABR, this tunnel notice message includes the tunnel letter of a MPLS traffic engineering tunnel
Breath, so that the 2nd ABR creates the 3rd of the 2nd ABR to the ABR according to the tunnel information of a MPLS traffic engineering tunnel
MPLS traffic engineering tunnel, the 3rd MPLS traffic engineering tunnel and a MPLS traffic engineering tunnel are two-way road tunnel altogether.
Alternatively, as another embodiment, processor 1101 is additionally operable to after creating this first mpls-te tunnel,
If a BGP LSP is revoked and a BGP LSP is the unique BGP LSP associating with a MPLS traffic engineering tunnel
When, delete a MPLS traffic engineering tunnel.
Figure 12 is the structural representation of the second area border router of one embodiment of the invention.2nd ABR of Fig. 9
1200 include processor 1201, memorizer 1202, receiving circuit 1203 and transtation mission circuit 1204.
Processor 1201 generates the first BGP label route.Transtation mission circuit 1204 issues this first BGP label to an ABR
Route, so that an ABR is according to a BGP LSP of this first BGP label Route establishment the first ABR to the 2nd ABR,
And a MPLS traffic engineering tunnel of ABR to the 2nd ABR is created further according to a BGP LSP.
It can be seen that, by technical scheme provided in an embodiment of the present invention, when ABR to the 2nd ABR 1200 needs to use
During MPLS traffic engineering tunnel transmission business, the 2nd ABR 1200 can issue BGP label route to an ABR, and an ABR is receiving
To after BGP label route, set up BGP LSP, and trigger establishment the first ABR to the 2nd ABR further according to BGP LSP
1200 mpls-te tunnel, can make MPLS traffic engineering tunnel automatically set up on demand with business, and improve MPLS traffic engineering tunnel
Allocative efficiency.
2nd ABR 1200 is capable of each process realized in the embodiment of Fig. 1 to Fig. 6 by the 2nd ABR, for avoiding
Repeat, repeat no more here.
Each assembly in 2nd ABR 1200 is coupled by bus system 1205, and wherein bus system 1205 is removed
Outside data/address bus, also include power bus, controlling bus and status signal bus in addition.But for the sake of clear explanation,
In fig .9 various buses are all designated as bus system 1205.
The method that the embodiments of the present invention disclose can apply in processor 1201, or real by processor 1201
Existing.Processor 1201 is probably a kind of IC chip, has the disposal ability of signal.During realizing, said method
Each step can be completed by the instruction of the integrated logic circuit of the hardware in processor 1201 or software form.Above-mentioned
Processor 1201 can be general processor, DSP, ASIC, FPGA or other PLDs, discrete gate or crystal
Pipe logical device, discrete hardware components.Can realize or execute the disclosed each method in the embodiment of the present invention, step and patrol
Collect block diagram.General processor can be microprocessor or this processor can also be any conventional processor etc..In conjunction with this
The step of the method disclosed in inventive embodiments can be embodied directly in hardware decoding processor execution and complete, or with decoding
Hardware in reason device and software module combination execution complete.Software module may be located at random access memory, flash memory, read-only storage
In the ripe storage medium in this area such as device, programmable read only memory or electrically erasable programmable memory, depositor.Should
Storage medium is located at memorizer 1202, and processor 1201 reads the information in memorizer 1202, completes above-mentioned side in conjunction with its hardware
The step of method.
Alternatively, as an embodiment, receiving circuit 1203 receives the second BGP label route that an ABR issues.
Processor 1201 according to the 2nd BGP LSP of this second BGP label Route establishment the 2nd ABR to the ABR, and further
Create the 2nd MPLS traffic engineering tunnel of the 2nd ABR to the ABR according to the 2nd BGP LSP.
Alternatively, as another embodiment, after creating the 2nd MPLS traffic engineering tunnel, if the 2nd BGP
When LSP is revoked and the 2nd BGP LSP is the unique BGP LSP associating with the 2nd MPLS traffic engineering tunnel, this processor 1201
It is additionally operable to delete the 2nd MPLS traffic engineering tunnel.
Alternatively, as another embodiment, receiving circuit 1203 receives the tunnel notice message that an ABR sends,
This tunnel notice message includes the tunnel information of a MPLS traffic engineering tunnel.Processor 1201 is according to a MPLS traffic engineering tunnel
Tunnel information, obtain the routing information of a MPLS traffic engineering tunnel, and the road according to a MPLS traffic engineering tunnel further
Footpath information, creates the 3rd MPLS traffic engineering tunnel of the 2nd ABR to the ABR, the 3rd MPLSTE using explicit path mode
Tunnel and a MPLS traffic engineering tunnel are two-way road tunnel altogether.
Alternatively, as another embodiment, this tunnel information includes：The Tunnel Identifier of extension, Tunnel Identifier and tunnel
End-point addresses.
So, by technical scheme provided in an embodiment of the present invention, when ABR to the 2nd ABR needs using MPLS TE
During tunnel transmission business, the 2nd ABR can issue BGP label route to an ABR, and an ABR is receiving BGP label route
Afterwards, set up BGP LSP, and trigger the MPLS TE tunnel creating ABR to the 2nd ABR further according to BGP LSP
Road, can make MPLS traffic engineering tunnel automatically set up on demand with business, and improve the allocative efficiency of MPLS traffic engineering tunnel.
Those of ordinary skill in the art are it is to be appreciated that combine the list of each example of the embodiments described herein description
Unit and algorithm steps, being capable of being implemented in combination in electronic hardware or computer software and electronic hardware.These functions are actually
To be executed with hardware or software mode, the application-specific depending on technical scheme and design constraint.Professional and technical personnel
Each specific application can be used different methods to realize described function, but this realization is it is not considered that exceed
The scope of the present invention.
Those skilled in the art can be understood that, for convenience and simplicity of description, the system of foregoing description,
Device and the specific work process of unit, may be referred to the corresponding process in preceding method embodiment, will not be described here.
It should be understood that disclosed system, apparatus and method in several embodiments provided herein, permissible
Realize by another way.For example, device embodiment described above is only schematically, for example, described unit
Divide, only a kind of division of logic function, actual can have other dividing mode when realizing, for example multiple units or assembly
Can in conjunction with or be desirably integrated into another system, or some features can be ignored, or does not execute.Another, shown or
The coupling each other discussing or direct-coupling or communication connection can be by some interfaces, the indirect coupling of device or unit
Close or communicate to connect, can be electrical, mechanical or other forms.
The described unit illustrating as separating component can be or may not be physically separate, show as unit
The part showing can be or may not be physical location, you can with positioned at a place, or can also be distributed to multiple
On NE.The mesh to realize this embodiment scheme for some or all of unit therein can be selected according to the actual needs
's.
In addition, can be integrated in a processing unit in each functional unit in each embodiment of the present invention it is also possible to
It is that unit is individually physically present it is also possible to two or more units are integrated in a unit.
If described function realized using in the form of SFU software functional unit and as independent production marketing or use when, permissible
It is stored in a computer read/write memory medium.Based on such understanding, technical scheme is substantially in other words
Partly being embodied in the form of software product of part that prior art is contributed or this technical scheme, this meter
Calculation machine software product is stored in a storage medium, including some instructions with so that a computer equipment（Can be individual
People's computer, server, or network equipment etc.）The all or part of step of execution each embodiment methods described of the present invention.
And aforesaid storage medium includes：USB flash disk, portable hard drive, read only memory（Read-Only Memory, ROM）, random access memory deposits
Reservoir（Random Access Memory, RAM）, magnetic disc or CD etc. are various can be with the medium of store program codes.
The above, the only specific embodiment of the present invention, but protection scope of the present invention is not limited thereto, and any
Those familiar with the art the invention discloses technical scope in, change or replacement can be readily occurred in, all should contain
Cover within protection scope of the present invention.Therefore, protection scope of the present invention should described be defined by scope of the claims.
Claims (20)
1. a kind of method of tunnel building is it is characterised in that methods described includes：
First area border router ABR receives the first Border Gateway Protocol (BGP) label routing that the 2nd ABR issues；
The first BGP mark of described ABR ABR to described 2nd ABR according to described first BGP label Route establishment
Sign switching path LSP；
A described ABR sets up the first multi-protocols mark of a described ABR to described 2nd ABR according to a described BGP LSP
Sign and exchange MPLS TE tunnel of traffic engineering.
2. method according to claim 1 is it is characterised in that methods described also includes：
A described ABR issues the second BGP label route to described 2nd ABR, so that described 2nd ABR is according to described second
2nd ABR described in BGP label Route establishment to the 2nd BGP LSP of a described ABR, and further according to described 2nd BGP
LSP sets up the 2nd MPLS traffic engineering tunnel from described 2nd ABR to a described ABR.
3. method according to claim 1 is it is characterised in that methods described also includes：
A described ABR sends tunnel notice message to described 2nd ABR, and described tunnel notice message includes a described MPLS
The tunnel information of traffic engineering tunnel, so that described 2nd ABR sets up described second according to the tunnel information of a described MPLS traffic engineering tunnel
To the 3rd MPLS traffic engineering tunnel of a described ABR, described 3rd MPLS traffic engineering tunnel and a described MPLS traffic engineering tunnel are ABR
Two-way road tunnel altogether.
4. the method according to any one of claims 1 to 3 is it is characterised in that methods described also includes：
A described ABR is after establishing a described MPLS traffic engineering tunnel, if a described BGP LSP is revoked and institute
When to state a BGP LSP be the unique BGP LSP associating with a described MPLS traffic engineering tunnel, delete a described MPLS TE tunnel
Road.
5. method according to claim 3 is it is characterised in that described tunnel notice message is：
Bgp update UPDATE message or tag distribution protocol LDP mapping Mapping message.
6. the method according to claim 3 or 5 is it is characterised in that described tunnel information includes：The Tunnel Identifier of extension,
Tunnel Identifier and tunnel endpoint addresses.
7. a kind of method of tunnel building is it is characterised in that methods described includes：
Second area border router ABR generates the first Border Gateway Protocol (BGP) label routing；
Described 2nd ABR issues described first BGP label route to an ABR, so that a described ABR is according to described first
The first BGP label switching path LSP of an ABR described in BGP label Route establishment to described 2nd ABR, and basis further
A described BGP LSP sets up first multiprotocol label switching MPLS traffic engineering TE of a described ABR to described 2nd ABR
Tunnel.
8. method according to claim 7 is it is characterised in that methods described also includes：
Described 2nd ABR receives the second BGP label route that a described ABR issues；
2nd BGP of described 2nd ABR the 2nd ABR to a described ABR according to described second BGP label Route establishment
LSP；
Described 2nd ABR sets up the 2nd MPLS TE tunnel of described 2nd ABR to a described ABR according to described 2nd BGP LSP
Road.
9. method according to claim 8 is it is characterised in that methods described also includes：
Described 2nd ABR is after establishing described 2nd MPLS traffic engineering tunnel, if described 2nd BGP LSP is revoked and institute
When to state the 2nd BGP LSP be the unique BGP LSP associating with described 2nd MPLS traffic engineering tunnel, delete described 2nd MPLS TE tunnel
Road.
10. method according to claim 7 is it is characterised in that methods described also includes：
Described 2nd ABR receives the tunnel notice message that a described ABR sends, and described tunnel notice message includes described first
The tunnel information of MPLS traffic engineering tunnel；
Described 2nd ABR, according to the tunnel information of a described MPLS traffic engineering tunnel, obtains the road of a described MPLS traffic engineering tunnel
Footpath information；
Described 2nd ABR, according to the routing information of a described MPLS traffic engineering tunnel, sets up described second using explicit path mode
To the 3rd MPLS traffic engineering tunnel of a described ABR, described 3rd MPLS traffic engineering tunnel and a described MPLS traffic engineering tunnel are ABR
Two-way road tunnel altogether.
11. methods according to claim 10 are it is characterised in that described tunnel information includes：The Tunnel Identifier of extension, tunnel
Road mark and tunnel endpoint addresses.
A kind of 12. first area border router ABR are it is characterised in that a described ABR includes：
Receiving unit, for receiving the first Border Gateway Protocol (BGP) label routing that the 2nd ABR issues；
Processing unit, for a BGP of an ABR to described 2nd ABR according to described first BGP label Route establishment
Label switching path LSP, and further a described ABR to the first of described 2nd ABR is set up according to a described BGP LSP
Multiprotocol label switching MPLS TE tunnel of traffic engineering.
13. ABR according to claim 12 are it is characterised in that a described ABR also includes：
Transmitting element, for issuing the second BGP label route to described 2nd ABR, so that described 2nd ABR is according to described second
2nd ABR described in BGP label Route establishment to the 2nd BGP LSP of a described ABR, and further according to described 2nd BGP
LSP sets up the 2nd MPLS traffic engineering tunnel of described 2nd ABR to a described ABR.
14. ABR according to claim 12 are it is characterised in that a described ABR also includes：
Transmitting element, for sending tunnel notice message to described 2nd ABR, described tunnel notice message includes described first
The tunnel information of MPLS traffic engineering tunnel, so that described 2nd ABR sets up institute according to the tunnel information of a described MPLS traffic engineering tunnel
State the 2nd ABR to the 3rd MPLS traffic engineering tunnel of a described ABR, described 3rd MPLS traffic engineering tunnel and a described MPLS TE
Tunnel is two-way road tunnel altogether.
15. ABR according to any one of claim 12 to 14, it is characterised in that described processing unit, are additionally operable to
After establishing a described MPLS traffic engineering tunnel, if a described BGP LSP be revoked and a described BGP LSP be with
During unique BGP LSP of a described MPLS traffic engineering tunnel association, delete a described MPLS traffic engineering tunnel.
A kind of 16. second area border router ABR are it is characterised in that described 2nd ABR includes：
Signal generating unit, for generating the first Border Gateway Protocol (BGP) label routing；
Transmitting element, for issuing described first BGP label route to an ABR, so that a described ABR is according to described first
The first BGP label switching path LSP of an ABR described in BGP label Route establishment to described 2nd ABR, and basis further
A described BGP LSP sets up first multiprotocol label switching MPLS traffic engineering TE of a described ABR to described 2nd ABR
Tunnel.
17. the 2nd ABR according to claim 16 are it is characterised in that described 2nd ABR also includes：
Receiving unit, for receiving the second BGP label route that a described ABR issues；
Processing unit, for the 2nd BGP of the 2nd ABR to a described ABR according to described second BGP label Route establishment
LSP, and the 2nd MPLS traffic engineering tunnel of described 2nd ABR to a described ABR is set up further according to described 2nd BGP LSP.
18. the 2nd ABR according to claim 17, it is characterised in that described processing unit, are additionally operable to, establishing
After stating the 2nd MPLS traffic engineering tunnel, if described 2nd BGP LSP is revoked and described 2nd BGP LSP is and described second
During unique BGP LSP of MPLS traffic engineering tunnel association, delete described 2nd MPLS traffic engineering tunnel.
19. the 2nd ABR according to claim 16 are it is characterised in that described 2nd ABR also includes：
Receiving unit, for receiving the tunnel notice message that a described ABR sends, described tunnel notice message includes described the
The tunnel information of one MPLS traffic engineering tunnel；
Processing unit, for the tunnel information according to a described MPLS traffic engineering tunnel, obtains a described MPLS traffic engineering tunnel
Routing information, and the routing information according to a described MPLS traffic engineering tunnel further, set up described using explicit path mode
Two ABR are to the 3rd MPLS traffic engineering tunnel of a described ABR, described 3rd MPLS traffic engineering tunnel and a described MPLS traffic engineering tunnel
For two-way road tunnel altogether.
20. the 2nd ABR according to claim 19 are it is characterised in that described tunnel information includes：The tunnel mark of extension
Knowledge, Tunnel Identifier and tunnel endpoint addresses.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310399870.6A CN103475557B (en) | 2013-09-05 | 2013-09-05 | Tunnel setup method and router |
| PCT/CN2014/084768 WO2015032275A1 (en) | 2013-09-05 | 2014-08-20 | Method and router for establishing tunnel |
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| CN201310399870.6A CN103475557B (en) | 2013-09-05 | 2013-09-05 | Tunnel setup method and router |
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| CN103475557B (en) * | 2013-09-05 | 2017-02-08 | 华为技术有限公司 | Tunnel setup method and router |
| CN104980347B (en) * | 2014-04-04 | 2019-02-12 | 华为技术有限公司 | A kind of method and device for establishing tunnel |
| CN104980362B (en) * | 2014-04-04 | 2019-04-12 | 华为技术有限公司 | A kind of service tunnel method for building up and equipment |
| CN105991385B (en) * | 2015-01-27 | 2019-03-26 | 华为技术有限公司 | A kind of method that establishing BGP lsp tunnel and the network equipment |
| US10637775B2 (en) * | 2015-10-17 | 2020-04-28 | Cisco Technology, Inc. | Make-before-break mechanism for label switched paths |
| CN107995084B (en) * | 2017-11-09 | 2020-12-01 | 新华三技术有限公司 | Tunnel selection method and device |
| CN112422307B (en) * | 2019-08-22 | 2022-06-14 | 华为技术有限公司 | Method, equipment and system for EVPN and VPLS coexistence dual-activity |
| CN112751741B (en) * | 2019-10-31 | 2023-09-15 | 中兴通讯股份有限公司 | Message transmission method and device |
| CN111064670B (en) * | 2019-12-30 | 2021-05-11 | 联想(北京)有限公司 | Method and device for acquiring next hop routing information |
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| US7751405B1 (en) * | 2007-09-26 | 2010-07-06 | Juniper Networks, Inc. | Automatic configuration of label switched path tunnels using BGP attributes |
| CN102123088B (en) * | 2011-02-21 | 2015-09-23 | 杭州华三通信技术有限公司 | Set up the method and apparatus of traffic engineering tunnel |
| CN105245452B (en) * | 2012-06-06 | 2018-11-16 | 华为技术有限公司 | Multi-protocol label switching traffic engineering tunnel establishing method and equipment |
| CN103475557B (en) * | 2013-09-05 | 2017-02-08 | 华为技术有限公司 | Tunnel setup method and router |
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| CN103475557A (en) | 2013-12-25 |
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