CN102065020B - Method and device for transmitting L2VPN service by using tunnel group in MPLS network - Google Patents
Method and device for transmitting L2VPN service by using tunnel group in MPLS network Download PDFInfo
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- CN102065020B CN102065020B CN201110025924.3A CN201110025924A CN102065020B CN 102065020 B CN102065020 B CN 102065020B CN 201110025924 A CN201110025924 A CN 201110025924A CN 102065020 B CN102065020 B CN 102065020B
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Abstract
The invention relates to a method and a device for transmitting a layer 2 virtual private network (L2VPN) service by using a tunnel group in a multi-protocol label switching (MPLS) network. The method comprises the following steps of: establishing the tunnel group between a transmitting end provider edge device (PE) and a receiving end PE, so that one or more packet switching network (PSN) tunnels in the MPLS network join in the tunnel group; binding the L2VPN service with the tunnel group, and selecting a PSN tunnel for bearing the L2VPN service in the tunnel group; and transmitting the L2VPN service by using the transmitting end PE and the receiving end PE through the selected PSN tunnel. The protection of pseudo wires (PWs) can be neglected in the L2VPN service, and the tunnel group can protect the PWs. The tunnel group technology has high extensibility, can support the conventional MPLS tunnel technology, and also can conveniently support MPLS tunnel technology which possibly occurs in the future. The tunnel group is easy to configure, and the configuration of the tunnel group can be dynamically modified in the state that the L2VPN service is not interrupted.
Description
Technical field
The present invention relates to method and device thereof that a kind of MPLS L2VPN business provides carrying and protection, specifically a kind of PSN tunnel by one or more identical or different types is integrated into the method and device thereof thinking in a tunnel group and realize routing forwarding.
Background technology
VPN (Virtual Private Network, virtual private networks) is that a kind of common network resource that utilizes provides the one of service special private network for specific user.In numerous classification of VPN, MPLS (MultiProtocol Label Switching, negotiate marking commutation) VPN has become most popular VPN technologies.In MPLS VPN technologies, L2VPN (Layer 2Virtual Private Network, i.e. virtual private network in second layer network), a kind of based on PW (Pseudo Wire, i.e. pseudo-line, on packet network tunnel, between two provider edge equipments, emulate the mechanism of point-to-point two layer services) realize the technology of virtual private network in second layer network.
In common MPLS L2VPN network model, be usually made up of PE (Provider Edge device, service provider's edge equipment), tunnel and CE (Customer Edge device, user's edge equipment) these parts.In PSN (Packet Switching Network, i.e. packet network) between PE, tunnel is used to the PW carrying various two layer services of emulation, forms two layers of virtual link between PE.Each PSN tunnel can carry multiple PW.
In order to ensure the reliability of L2VPN business, a kind of common way increases over run tunnel, realizes the protection to PW.When a tunnel failure, the PW carried still can select, from over run tunnel to realize the transmission of its business datum, to such a process increases the complexity of L2VPN service deployment.
Summary of the invention
The object of the invention is in order to provide a kind of with tunnel group form for L2VPN provides PW bearing mode with protection mechanism.L2VPN business can be indifferent to tunnel group how for its PW provides protection, reduces the complexity of service deployment, decreases the coupling of L2VPN business and its bearing tunnel.
According to an aspect of the present invention, the invention provides in a kind of MPLS network the method using tunnel group transmission L2VPN business, comprise the following steps:
A) between transmitting terminal PE and receiving terminal PE, set up tunnel group, make the one or more PSN tunnel in MPLS network add described tunnel group;
B) by L2VPN business and the group binding of described tunnel, the PSN tunnel being used in described tunnel group carrying L2VPN business is selected;
C) transmitting terminal PE and the receiving terminal PE transmission that utilizes the PSN tunnel of described selection to realize L2VPN business.
Wherein, steps A) comprising:
For described tunnel group arranges tunnel group number;
For described tunnel group arranges the use priority of the PSN tunnel that it comprises;
Be that single-shot list is received pattern or multiple choosing and received pattern for described tunnel group arranges mode of operation.
Wherein, described single-shot list receipts pattern and described multiple choosing receipts pattern are respectively:
Pattern received by single-shot list, and effective PSN tunnel that transmitting terminal PE uses described PSN tunnel group medium priority the highest sends information, the L2VPN business datum that receiving terminal PE receiving end/sending end PE sends;
Multiple choosing receipts pattern, transmitting terminal PE effective PSN tunnel each in described tunnel group sends information, and receiving terminal PE selects the L2VPN business datum received the highest effective PSN tunnel of described PSN tunnel group medium priority and send.
In addition, steps A) also comprise:
For the PSN tunnel in described tunnel group arranges the usage flag of affiliated tunnel group;
Form built tunnel group for described tunnel to transmit, described tunnel group transmits the forwarding information comprising all PSN tunnel adding this tunnel group;
For each PSN tunnel in described tunnel group arranges the testing mechanism for detecting tunnel validity.
Wherein, step B) be specially:
If the mode of operation of tunnel group is single-shot list receive pattern, then transmitting terminal PE selects group medium priority the highest effective PSN tunnel in described tunnel to be used for carrying L2VPN business;
If the mode of operation of tunnel group is multiple choosing receipts pattern, then transmitting terminal PE selects each effective PSN tunnel in described tunnel group to be used for carrying L2VPN business.
Wherein, step C) be specially:
The L2VPN business datum that the local CE be attached thereto uploads is forwarded to receiving terminal PE by transmitting terminal PE;
The L2VPN business datum that receiving terminal PE receiving end/sending end PE is sent by described tunnel group.
Wherein step C) in, the L2VPN business datum that the local CE be attached thereto uploads is forwarded to receiving terminal PE by transmitting terminal PE; Be specially:
The described L2VPN business datum that local CE uploads by transmitting terminal PE carries out PW encapsulation;
Transmitting terminal PE pair is carried out judgement with the mode of operation of the tunnel group of described L2VPN business-binding and processes:
If pattern received by single-shot list, then transmit the bearing tunnel of the highest effective PSN tunnel of middle selection priority as the L2VPN business datum of carrying out described PW encapsulation from the tunnel group corresponding to described tunnel group, and by tunneling technique, outer layer tunnel encapsulation is carried out to L2VPN business datum, then packaged data are sent to receiving terminal PE;
If MIMO pattern, then the effective PSN tunnel in transmitting by the tunnel group corresponding to described tunnel group respectively carries out outer layer tunnel encapsulation to the L2VPN business datum of carrying out described PW encapsulation, and is sent to receiving terminal PE.
Wherein step C) in, the L2VPN business datum that receiving terminal PE receiving end/sending end PE is sent by described tunnel group; Be specially:
Receiving terminal PE is receiving in the L2VPN business datum process sent by PSN tunnel from described transmitting terminal PE, judge PSN tunnel whether have for described tunnel group usage flag, and whether only have one deck for the MPLS label of described PW, and L2VPN business corresponding to described PW whether with the group binding of described tunnel;
Be all yes if above-mentioned, then again judgement process carried out to the mode of operation of described tunnel group:
If pattern received by single-shot list, then receiving terminal PE receives L2VPN business datum, and L2VPN business datum is transmitted to the local CE be attached thereto by the forwarding information in transmitting according to tunnel group;
If multiple choosing receipts pattern, then receiving terminal PE receives only the L2VPN business datum that PSN tunnel transmission is received in group medium priority the highest choosing in described tunnel, and L2VPN business datum is transmitted to the local CE be connected with receiving terminal PE by the forwarding information in transmitting according to tunnel group, the L2VPN business datum that other PSN tunnel forward abandons.
Exist in addition, step C) also comprise afterwards:
Tunnel group transmit in a PSN tunnel through its testing mechanism detect become invalid time, then judge that whether described PSN tunnel is last effective tunnel of described tunnel group; If so, then delete this tunnel group to transmit;
If not, then judgement process is carried out to the mode of operation of described tunnel group:
If pattern received by single-shot list, then from other effective PSN tunnel of described tunnel group, select a tunnel that priority is the highest as the L2VPN service bearer tunnel with the group binding of described tunnel, the L2VPN business datum that receiving terminal PE receiving end/sending end PE sends;
If multiple choosing receipts pattern, then send information with other effective PSN tunnel of tunnel group, and determine that PSN tunnel is received as choosing in a tunnel that priority is the highest, receiving terminal PE receives the L2VPN business datum that PSN tunnel transmission is received in the choosing determined.
Exist in addition, step C) also comprise afterwards: a PSN tunnel in described tunnel group when the detection of its testing mechanism becomes effective, then judges whether described tunnel group exists tunnel group and transmit, if do not exist, then creates described tunnel group and transmit;
If exist, then judgement process is carried out to the mode of operation of described tunnel group:
If pattern received by single-shot list, then from all effective PSN tunnel of described tunnel group, select a tunnel that priority is the highest as the L2VPN service bearer tunnel with the group binding of described tunnel, the L2VPN business datum that receiving terminal PE receiving end/sending end PE sends;
If multiple choosing receipts pattern, then send information with effective PSN tunnel that described tunnel group is all, and determine that PSN tunnel is received as choosing in a tunnel that priority is the highest, receiving terminal PE receives the L2VPN business datum that PSN tunnel transmission is received in the choosing determined.
According to a further aspect in the invention, present invention also offers in a kind of MPLS the device using tunnel group transmission L2VPN business, comprising:
Setting up module, for setting up tunnel group between transmitting terminal PE and receiving terminal PE, making the one or more PSN tunnel in MPLS add described tunnel group;
Binding module: for by L2VPN business and the group binding of described tunnel, select the PSN tunnel being used in described tunnel group carrying L2VPN business;
Transport module, the transmission that transmitting terminal PE and receiving terminal PE utilizes the PSN tunnel of described selection to realize L2VPN business.
Wherein, set up module also to comprise:
First arranges module, for arranging tunnel group number for described tunnel group, for each PSN tunnel in described tunnel group is set using priority; And be that single-shot list is received pattern or multiple choosing and received pattern for described tunnel group arranges mode of operation.
In addition, set up module also to comprise:
Second arranges module, for the PSN tunnel in described tunnel group arranges the usage flag of affiliated tunnel group; Form built tunnel group for described tunnel to transmit; For each PSN tunnel in described tunnel group arranges the detection for detecting tunnel validity.
Wherein, transport module comprises:
Sending module, the L2VPN business datum that the local CE be attached thereto uploads is forwarded to receiving terminal PE by transmitting terminal PE;
Receiver module, the L2VPN business datum that receiving terminal PE receiving end/sending end PE is sent by described tunnel group.
Wherein, sending module comprises:
Package module, the described L2VPN business datum that local CE uploads by transmitting terminal PE carries out PW encapsulation;
First judges mould processing block, and transmitting terminal PE pair is carried out judgement with the mode of operation of the tunnel group of described L2VPN business-binding and process:
If pattern received by single-shot list, then transmit the bearing tunnel of the highest effective PSN tunnel of middle selection priority as L2VPN business datum from the tunnel group corresponding to described tunnel group, and by tunneling technique, outer layer tunnel encapsulation is carried out to the L2VPN business datum of carrying out described PW encapsulation, then packaged data are sent to receiving terminal PE;
If MIMO pattern, then the effective PSN tunnel in transmitting by the tunnel group corresponding to described tunnel group respectively carries out outer layer tunnel encapsulation to the L2VPN business datum of carrying out described PW encapsulation, and is sent to receiving terminal PE;
Described receiver module comprises:
Second judging treatmenting module, receiving terminal PE is receiving in the L2VPN business datum process sent by PSN tunnel from described transmitting terminal PE, judge PSN tunnel whether have for tunnel group usage flag, and whether only have one deck for the MPLS label of PW, and L2VPN business corresponding to described PW whether with the group binding of described tunnel;
Be all yes if above-mentioned, then again judgement process carried out to the mode of operation of described tunnel group:
If pattern received by single-shot list, then receiving terminal PE receives L2VPN business datum, and L2VPN business datum is transmitted to the local CE be attached thereto by the forwarding information in transmitting according to tunnel group;
If multiple choosing receipts pattern, then receiving terminal PE receives only the L2VPN business datum that PSN tunnel transmission is received in group medium priority the highest choosing in described tunnel, and L2VPN business datum is transmitted to the local CE be connected with receiving terminal PE by the forwarding information in transmitting according to tunnel group, the L2VPN business datum that other PSN tunnel forward abandons.
Apparatus of the present invention also comprise in addition:
3rd judging treatmenting module, tunnel group transmit in a PSN tunnel through its testing mechanism detect become invalid time, then judge that whether described PSN tunnel is last effective tunnel of described tunnel group; If so, then delete this tunnel group to transmit;
If not, then judgement process is carried out to the mode of operation of described tunnel group:
If pattern received by single-shot list, then from other effective PSN tunnel of described tunnel group, select a tunnel that priority is the highest as the L2VPN service bearer tunnel with the group binding of described tunnel, the L2VPN business datum that receiving terminal PE receiving end/sending end PE sends;
If multiple choosing receipts pattern, then send information with other effective PSN tunnel of tunnel group, and determine that PSN tunnel is received as choosing in a tunnel that priority is the highest, receiving terminal PE receives the L2VPN business datum that PSN tunnel transmission is received in the choosing determined;
4th judging treatmenting module, a PSN tunnel in described tunnel group when the detection of its testing mechanism becomes effective, then judges whether described tunnel group exists tunnel group and transmit, if do not exist, then creates described tunnel group and transmit;
If exist, then judgement process is carried out to the mode of operation of described tunnel group:
If pattern received by single-shot list, then from all effective PSN tunnel of described tunnel group, select a tunnel that priority is the highest as the L2VPN service bearer tunnel with the group binding of described tunnel, the L2VPN business datum that receiving terminal PE receiving end/sending end PE sends;
If multiple choosing receipts pattern, then send information with effective PSN tunnel that described tunnel group is all, and determine that PSN tunnel is received as choosing in a tunnel that priority is the highest, receiving terminal PE receives the L2VPN business datum that PSN tunnel transmission is received in the choosing determined.
Compared with prior art, use method and the device thereof of tunnel group transmission L2VPN business in a kind of MPLS network of the present invention, provide a kind of tunnel transmitted in MPLS network for L2VPN business and carry and resist technology; Reduce the coupling of L2VPN business and bearing tunnel, L2VPN business does not need the protection problem paying close attention to PW, and tunnel group is provided conservation treatment therein.The extensibility of this tunnel group technique is good, can support existing MPLS tunneling technique, also can support the MPLS tunneling technique that may occur future easily.The configuration of tunnel group is simple, can dynamically revise tunnel group configuration under the unbroken state of L2VPN business.Preservation tactics can flexible configuration, and extensibility is strong; When there is protection and switching in some MPLS tunneling techniques; the L2VPN data message that it carries may need to encapsulate two-layer above label; and adopt this tunnel group technique when L2VPN business transmits in an mpls network; even if when protecting switching; do not need to increase the tagged encapsulation number of plies, and be consistent when handling process and generation protection switch yet.
Accompanying drawing explanation
Fig. 1 is the flow chart using tunnel group transmission L2VPN operational approach in an mpls network;
Fig. 2 is the handling process schematic diagram that transmitting terminal PE forwards the data to receiving terminal PE;
Fig. 3 is the handling process schematic diagram of the data that receiving terminal PE receiving end/sending end PE forwards;
Fig. 4 is the handling process schematic diagram of a PSN tunnel during tunnel group is transmitted when becoming invalid;
Fig. 5 is the handling process schematic diagram of a PSN tunnel in tunnel group when becoming effective;
Fig. 6 is the networking diagram using tunnel group carrying and protection L2VPN business in an mpls network;
Fig. 7 is the syndeton block diagram of apparatus of the present invention and receiving terminal PE and transmitting terminal PE;
Fig. 8 is the structured flowchart setting up module in apparatus of the present invention;
Fig. 9 is the structured flowchart of transport module in apparatus of the present invention.
Embodiment
Below in conjunction with accompanying drawing to a preferred embodiment of the present invention will be described in detail, should be appreciated that following illustrated preferred embodiment is only for instruction and explanation of the present invention, is not intended to limit the present invention.
Use the method for tunnel group transmission L2VPN business in the present invention in a kind of MPLS network, as shown in Figure 1, comprise the following steps:
S11) between transmitting terminal PE and receiving terminal PE, set up tunnel group, make the one or more PSN tunnel in MPLS network add described tunnel group;
S12) by L2VPN business and the group binding of described tunnel, the PSN tunnel being used in described tunnel group carrying L2VPN business is selected;
S13) transmitting terminal PE and the receiving terminal PE transmission that utilizes the PSN tunnel of described selection to realize L2VPN business.
Wherein, step S11) in also comprise:
For described tunnel group arranges tunnel group number;
For described tunnel group arranges the use priority of each PSN tunnel that it comprises;
Be that single-shot list is received pattern or multiple choosing and received pattern for described tunnel group arranges mode of operation.
Wherein, single-shot list receipts pattern and described multiple choosing receipts pattern are respectively:
Pattern received by single-shot list, and effective PSN tunnel that transmitting terminal PE uses described PSN tunnel group medium priority the highest sends information, the L2VPN business datum that receiving terminal PE receiving end/sending end PE sends;
Multiple choosing receipts pattern, transmitting terminal PE effective PSN tunnel each in described tunnel group sends information, receiving terminal PE receives the L2VPN business datum of the highest effective PSN tunnel carrying of described PSN tunnel group medium priority, and the L2VPN business datum that PSN tunnel low for other priority carries is abandoned.
When only needing to provide single-shot list to receive the protected mode of (namely local end PE sends a flow, and opposite end PE can only receive a flow process), only single-point configuration can be carried out; Receive when the multiple choosing of selection and (namely send many parts of same traffic in local end PE; by opposite end PE select receive a flow) protected mode; need to carry out balanced configuration, namely all will be configured on the PE at the two ends of L2VPN network, and the PSN tunnel configuration in corresponding tunnel group must be identical.
In addition, step S11) in also comprise:
For the PSN tunnel in tunnel group arranges the usage flag of affiliated tunnel group;
Build a tunnel group transmit for described tunnel is formed, it comprises the forwarding information of all PSN tunnel adding this tunnel group;
For each PSN tunnel in tunnel group arranges the testing mechanism for detecting tunnel validity.
Wherein, the PSN tunnel in tunnel group can be static configuration, also can be that dynamical fashion negotiates.The tunnel that the type of PSN tunnel can be RSVP-TE tunnel, gre tunneling or other MPLS network are supported.Each PSN tunnel needs the testing mechanism configuring oneself to detect validity.When configuring, a PSN tunnel can add in multiple tunnels group, and a L2VPN business can only be bound with a tunnel group, and a tunnel group may be used for multiple L2VPN business.When having at least a PSN tunnel to create successfully in tunnel group, namely forming tunnel group in data retransmission aspect and transmitting.When the state of the individual tunnel of tunnel group changes, need the forwarding information upgrading this tunnel in its all tunnels group added immediately.After in this tunnel group, last PSN tunnel is removed, it is deleted that its corresponding tunnel group transmits needs.
Wherein, step S12) in:
If the mode of operation of tunnel group is single-shot list receive pattern, then the priority that transmitting terminal PE transmits middle tunnel according to tunnel group selects effective PSN tunnel that tunnel group medium priority is the highest, and carries L2VPN business with this tunnel;
If the mode of operation of tunnel group is multiple choosing receipts pattern, then transmitting terminal PE selects each effective PSN tunnel in tunnel group to be used for carrying L2VPN business.
Wherein, step 13) be specially:
The L2VPN business datum that the local CE be attached thereto uploads is forwarded to receiving terminal PE by transmitting terminal PE;
The L2VPN business datum that receiving terminal PE receiving end/sending end PE is sent by described tunnel group.
Wherein, the L2VPN business datum that the local CE be attached thereto uploads is forwarded to receiving terminal PE by transmitting terminal PE; As shown in Figure 2, be specially:
S21) the L2VPN business datum that local CE uploads by transmitting terminal PE carries out PW encapsulation;
S22) mode of operation of the tunnel group of transmitting terminal PE pair and L2VPN business-binding is carried out judgement and is processed:
If pattern received by single-shot list, then perform S23) transmit the bearing tunnel of the highest effective PSN tunnel of middle selection priority as L2VPN business datum from the tunnel group corresponding to tunnel group, and by tunneling technique, outer layer tunnel encapsulation is carried out to the L2VPN business datum of having carried out PW encapsulation, then by effective PSN tunnel that the priority selected is the highest, packaged L2VPN business datum is sent to receiving terminal PE;
If MIMO pattern, then perform S24) transmit by the tunnel group corresponding to tunnel group respectively in effective PSN tunnel outer layer tunnel encapsulation is carried out to the L2VPN business datum of having carried out PW encapsulation, and be sent to receiving terminal PE.
Wherein, the L2VPN business datum that sent by described tunnel group of receiving terminal PE receiving end/sending end PE; As shown in Figure 3, be specially:
S31) receiving terminal PE receives the L2VPN business datum sent by PSN tunnel from described transmitting terminal PE;
S32) in receiving terminal PE receiving course, judge that whether the usage flag of PSN tunnel is the PSN tunnel of described tunnel group, if PSN tunnel does not add tunnel group, then perform step S34) by the original flow processing collecting message of PSN tunnel;
If step S32) be yes, then perform S33) and then judge whether the MPLS label of only having one deck for PW, and L2VPN business corresponding to described PW whether with the group binding of described tunnel; If be in no situation S32), then perform step S34) by the original flow processing collecting message of PSN tunnel;
If above-mentioned steps S32) and step S33) be all yes, then perform S35) judgement process is carried out to the mode of operation of described tunnel group:
If pattern received by single-shot list, then performing S36) receiving terminal PE receives L2VPN business datum, and L2VPN business datum is transmitted to the local CE be attached thereto by the forwarding information in transmitting according to tunnel group;
If multiple choosing receipts pattern, then performing S37) receiving terminal PE receives only the highest choosing of described tunnel group medium priority and receives the L2VPN business datum that PSN tunnel sends, and L2VPN business datum is transmitted to the local CE be connected with receiving terminal PE by the forwarding information in transmitting according to tunnel group, the L2VPN business datum that other PSN tunnel forward abandons.
In addition, step S13) after also comprise, tunnel group transmit in PSN tunnel detect through its testing mechanism the handling process that in last handling process, PSN tunnel lost efficacy, as shown in Figure 4:
S41) tunnel group transmit in a PSN tunnel through its testing mechanism detect become invalid time,
S42) judge that whether described PSN tunnel is last effective tunnel of described tunnel group; If so, then S43 is performed) delete this tunnel group and transmit;
If not, then perform S44) judgement process is carried out to the mode of operation of described tunnel group:
If pattern received by single-shot list, then perform S45) from other effective PSN tunnel of described tunnel group, select a tunnel that priority is the highest as the L2VPN service bearer tunnel with the group binding of described tunnel, the L2VPN business datum that receiving terminal PE receiving end/sending end PE sends;
If multiple choosing receipts pattern, then perform S46) reduce a flow transmitting-receiving on this PSN tunnel, information is sent with other effective PSN tunnel of tunnel group, and determining that PSN tunnel is received as choosing in a tunnel that priority is the highest, receiving terminal PE receives the L2VPN business datum that PSN tunnel transmission is received in the choosing determined.
In addition, step S13) after also comprise, tunnel group transmit in PSN tunnel detect PSN tunnel in last handling process through its testing mechanism and become effective processing procedure, as shown in Figure 5:
S51) PSN tunnel in tunnel group through its testing mechanism detect become effective time,
Carry out S52) judge whether described tunnel group exists tunnel group and transmit, if do not exist, then performs S53) create described tunnel group and transmit;
If exist, then perform S54) judgement process is carried out to the mode of operation of described tunnel group:
If pattern received by single-shot list, then perform S55) determine whether carrying out the process of protection switchback according to tunnel group Preservation tactics, namely from all effective PSN tunnel of described tunnel group, select a tunnel that priority is the highest as the L2VPN service bearer tunnel with the group binding of described tunnel, the L2VPN business datum that receiving terminal PE receiving end/sending end PE sends;
If multiple choosing receipts pattern, then perform S56) the automatic transmitting-receiving increasing a flow on this PSN tunnel, the effective PSN tunnel all by described tunnel group sends information, and determining that PSN tunnel is received as choosing in a tunnel that priority is the highest, receiving terminal PE receives the L2VPN business datum that PSN tunnel transmission is received in the choosing determined.
The present invention will be described, if Fig. 6 is the typical networking diagram of band PW defencive function to use tunnel group to come as the networking diagram of carrying and protection according to MPLS L2VPN of the present invention below.It forms a MPLS network by two PE equipment and multiple P equipment, and two form a L2VPN network for user provides the CE equipment of L2VPN access service to access respectively on two PE.Between PE1 and PE2, there is a tunnel group, be made up of two different PSN tunnel, the type in tunnel can be the same or different.Set up a PW between PE1 and PE2, this PW by binding this tunnel group with the PE equipment selecting PSN tunnel wherein data to be sent to opposite end, and realizes the defencive function to carrying PW data.
The MPLS network that hardware components is made up of two pe routers and multiple stage P router, two ce routers to come etc. to form a MPLS L2VPN by accessing this MPLS network, and networking graph of a relation as shown in Figure 1.
The treatment step of software section is as follows:
The first step: in pe router and P configuration of routers MPLS network, sets up two dissimilar PSN tunnel.The overall Router Distinguisher of PE1 is the overall Router Distinguisher of 10.1.1.1, PE1 is 10.1.1.2.The wherein bidirectional tunnel for RSVP-TE foundation of tunnel1, tunnel number is 1; Tunnel2 is static lsp tunnel, tunnel number be 100 (remarks: the distribution in the tunnel in often kind of tunnel number can be independent of each other).The deploy contents such as the validation checking in each tunnel, owing to being prior art, have not here just elaborated.
Second step: configured tunneling technique group, makes the tunnel group configuration of PE1 and PE2 be consistent
(1) create tunnel group, and specify tunnel group number to be 1
tunnel-group 1
In this tunnel group, control word function is set
control-word enable
The protected mode of tunnel group is specified to be that single-shot list is received
protect-mode single
(2) in tunnel group, member tunnel is increased, and assigned priority;
sub-tunnel rsvp-te 1priority 1
sub-tunnel static-lsp 100priority 3
3rd step: by tunnel group and a L2VPN business-binding
(1) configuration on PE1
mpls xonnect 10.1.1.2pwtype eth-vlan vcid 100tunnelgroup 1
(2) configuration on PE2
mpls xonnect 10.1.1.1pwtype eth-vlan vcid 100tunnelgroup 1
After configuring, the vocational work of this L2VPN is on the tunnel tunnel1 of RSVP-TE
4th step: amendment tunnel group configuration
Now for some reason, service provider needs to adjust network, and replace current work tunnel tunnel1 with the static lsp tunnel that another tunnel number is 20, the forward-path in two tunnels is identical.
(1) as follows in the configuration of tunnel group
sub-tunnel static-lsp 20priority 2
(2) close the tunnel tunnel1 of RSVP-TE, make tunnel group that protection occur automatically and switch, newly-increased tunnel number is that 20 static lsp tunnels become current work tunnel, and tunnel number is originally that the static lsp tunnel of 100 is still as protection tunnel; Then in tunnel group, RSVP-TE tunnel is deleted.
no sub-tunnel rsvp-te 1
According to a further aspect in the invention, the present invention also provides in a kind of MPLS network the device using tunnel group transmission L2VPN business, as shown in Figure 7, the syndeton block diagram of apparatus of the present invention and transmitting terminal PE and receiving terminal PE, apparatus of the present invention mainly comprise: set up module, binding module, transport module, and the 3rd judging treatmenting module and the 4th judging treatmenting module, its concrete function is:
Setting up module, for setting up tunnel group between transmitting terminal PE and receiving terminal PE, making the one or more PSN tunnel in MPLS network add described tunnel group;
Binding module: for by L2VPN business and the group binding of described tunnel, select the PSN tunnel being used in described tunnel group carrying L2VPN business;
Transport module, the transmission that transmitting terminal PE and receiving terminal PE utilizes the PSN tunnel of described selection to realize L2VPN business.
3rd judging treatmenting module, tunnel group transmit in a PSN tunnel through its testing mechanism detect become invalid time, then judge that whether described PSN tunnel is last effective tunnel of described tunnel group; If so, then delete this tunnel group to transmit;
If not, then judgement process is carried out to the mode of operation of described tunnel group:
If pattern received by single-shot list, then from other effective PSN tunnel of described tunnel group, select a tunnel that priority is the highest as the L2VPN service bearer tunnel with the group binding of described tunnel, the L2VPN business datum that receiving terminal PE receiving end/sending end PE sends;
If multiple choosing receipts pattern, then send information with other effective PSN tunnel of tunnel group, and determine that PSN tunnel is received as choosing in a tunnel that priority is the highest, receiving terminal PE receives the L2VPN business datum that PSN tunnel transmission is received in the choosing determined;
4th judging treatmenting module, a PSN tunnel in described tunnel group when the detection of its testing mechanism becomes effective, then judges whether described tunnel group exists tunnel group and transmit, if do not exist, then creates described tunnel group and transmit;
If exist, then judgement process is carried out to the mode of operation of described tunnel group:
If pattern received by single-shot list, then from all effective PSN tunnel of described tunnel group, select a tunnel that priority is the highest as the L2VPN service bearer tunnel with the group binding of described tunnel, the L2VPN business datum that receiving terminal PE receiving end/sending end PE sends;
If multiple choosing receipts pattern, then send information with effective PSN tunnel that described tunnel group is all, and determine that PSN tunnel is received as choosing in a tunnel that priority is the highest, receiving terminal PE receives the L2VPN business datum that PSN tunnel transmission is received in the choosing determined.
Wherein, set up module, as shown in Figure 8, also comprise:
First arranges module, for arranging tunnel group number for described tunnel group, is the use priority of each PSN tunnel in described tunnel group; And be that single-shot list is received pattern or multiple choosing and received pattern for described tunnel group arranges mode of operation.
Second arranges module, for the PSN tunnel in described tunnel group arranges the usage flag of affiliated tunnel group; Form built tunnel group for described tunnel to transmit; For each PSN tunnel in described tunnel group arranges the detection for detecting tunnel validity.
Wherein, transport module, as shown in Figure 9, comprising:
Sending module, the L2VPN business datum that the local CE be attached thereto uploads is forwarded to receiving terminal PE by transmitting terminal PE;
Receiver module, the L2VPN business datum that receiving terminal PE receiving end/sending end PE is sent by described tunnel group.
Wherein, sending module comprises:
Package module, the described L2VPN business datum that local CE uploads by transmitting terminal PE carries out PW encapsulation;
First judges mould processing block, and transmitting terminal PE pair is carried out judgement with the mode of operation of the tunnel group of described L2VPN business-binding and process:
If pattern received by single-shot list, then transmit the bearing tunnel of the highest effective PSN tunnel of middle selection priority as L2VPN business datum from the tunnel group corresponding to described tunnel group, and by tunneling technique, outer layer tunnel encapsulation is carried out to the L2VPN business datum of having carried out PW encapsulation, then packaged data are sent to receiving terminal PE;
If MIMO pattern, then the effective PSN tunnel in transmitting by the tunnel group corresponding to described tunnel group respectively carries out outer layer tunnel encapsulation to the L2VPN business datum of having carried out PW encapsulation, and is sent to receiving terminal PE;
Wherein, receiver module comprises:
Second judging treatmenting module, receiving terminal PE is receiving in the L2VPN business datum process sent by PSN tunnel from described transmitting terminal PE, judge whether PSN tunnel has the usage flag for tunnel group, and whether only have one deck for the MPLS label of PW, and L2VPN business corresponding to described PW whether with the group binding of described tunnel;
Be all yes if above-mentioned, then again judgement process carried out to the mode of operation of described tunnel group:
If pattern received by single-shot list, then receiving terminal PE receives L2VPN business datum, and L2VPN business datum is transmitted to the local CE be attached thereto by the forwarding information in transmitting according to tunnel group;
If multiple choosing receipts pattern, then receiving terminal PE only receives the L2VPN business datum of PSN tunnel receiving end/sending end PE transmission in the choosing that described tunnel group medium priority is the highest, and being transmitted to the local CE be attached thereto, the L2VPN business datum that PSN tunnel forwarding is received in other non-choosings abandons.
Above content is in conjunction with concrete preferred implementation further description made for the present invention, can not assert that specific embodiment of the invention is confined to these explanations.For general technical staff of the technical field of the invention, without departing from the inventive concept of the premise, some simple deduction or replace can also be made, all should be considered as belonging to protection scope of the present invention.
Claims (16)
1. use a method for tunnel group transmission L2VPN business in MPLS network, it is characterized in that, comprise the following steps:
A) between transmitting terminal PE and receiving terminal PE, set up tunnel group, make the PSN tunnel of the one or more identical or different type in MPLS network add described tunnel group;
B) by a L2VPN business and the group binding of described tunnel, and from the described tunnel group of described L2VPN business-binding select the PSN tunnel that is used for carrying described L2VPN business;
C) transmitting terminal PE and the receiving terminal PE transmission that utilizes the PSN tunnel selected from described tunnel group to realize described L2VPN business;
Wherein, if the mode of operation of described tunnel group is multiple choosing receipts pattern, then transmitting terminal PE effective PSN tunnel each in described tunnel group sends information, and receiving terminal PE selects the described L2VPN business datum received the highest effective PSN tunnel of described PSN tunnel group medium priority and send;
Wherein, described MPLS is negotiate marking commutation, and described L2VPN is virtual private network in second layer network, and described PE is service provider's edge equipment, and described PSN is packet network.
2. method according to claim 1, is characterized in that, described steps A) comprising:
For described tunnel group arranges tunnel group number;
For described tunnel group arranges the use priority of the PSN tunnel that it comprises;
Be that single-shot list is received pattern or multiple choosing and received pattern for described tunnel group arranges mode of operation.
3. method according to claim 2, it is characterized in that, if the mode of operation of described tunnel group is single-shot list receive pattern, effective PSN tunnel that then transmitting terminal PE uses described PSN tunnel group medium priority the highest sends information, the described L2VPN business datum that receiving terminal PE receiving end/sending end PE sends.
4. method according to claim 3, is characterized in that, described steps A) also comprise:
For the PSN tunnel in described tunnel group arranges the usage flag of affiliated tunnel group;
Form built tunnel group for described tunnel to transmit, described tunnel group transmits the forwarding information comprising all PSN tunnel adding this tunnel group;
For each PSN tunnel in described tunnel group arranges the testing mechanism for detecting tunnel validity.
5. method according to claim 4, is characterized in that, described step B) be specially:
If the mode of operation of tunnel group is single-shot list receive pattern, then transmitting terminal PE selects group medium priority the highest effective PSN tunnel in described tunnel to be used for carrying L2VPN business;
If the mode of operation of tunnel group is multiple choosing receipts pattern, then transmitting terminal PE selects each effective PSN tunnel in described tunnel group to be used for carrying L2VPN business.
6. method according to claim 4, is characterized in that, described step C) be specially:
The L2VPN business datum that the local CE be attached thereto uploads is forwarded to receiving terminal PE by transmitting terminal PE;
The L2VPN business datum that receiving terminal PE receiving end/sending end PE is sent by described tunnel group;
Wherein, described CE is customer edge.
7. method according to claim 6, is characterized in that, the L2VPN business datum that the local CE be attached thereto uploads is forwarded to receiving terminal PE by described transmitting terminal PE; Be specially:
The described L2VPN business datum that local CE uploads by transmitting terminal PE carries out PW encapsulation;
Transmitting terminal PE pair is carried out judgement with the mode of operation of the tunnel group of described L2VPN business-binding and processes:
If pattern received by single-shot list, then transmit the bearing tunnel of the highest effective PSN tunnel of middle selection priority as the L2VPN business datum of carrying out described PW encapsulation from the tunnel group corresponding to described tunnel group, and by tunneling technique, outer layer tunnel encapsulation is carried out to L2VPN business datum, then packaged data are sent to receiving terminal PE;
If multiple choosing receipts pattern, then the effective PSN tunnel in transmitting by the tunnel group corresponding to described tunnel group respectively carries out outer layer tunnel encapsulation to the L2VPN business datum of carrying out described PW encapsulation, and is sent to receiving terminal PE;
Wherein, described PW is pseudo-line.
8. method according to claim 7, is characterized in that, the L2VPN business datum that described receiving terminal PE receiving end/sending end PE is sent by described tunnel group; Be specially:
Receiving terminal PE is receiving in the L2VPN business datum process sent by PSN tunnel from described transmitting terminal PE, judge whether PSN tunnel has the usage flag for described tunnel group, and whether only have one deck for the MPLS label of described PW, and L2VPN business corresponding to described PW whether with the group binding of described tunnel;
Be all yes if above-mentioned, then again judgement process carried out to the mode of operation of described tunnel group:
If pattern received by single-shot list, then receiving terminal PE receives L2VPN business datum, and L2VPN business datum is transmitted to the local CE be attached thereto by the forwarding information in transmitting according to tunnel group;
If multiple choosing receipts pattern, then receiving terminal PE receives only the L2VPN business datum that PSN tunnel transmission is received in group medium priority the highest choosing in described tunnel, and L2VPN business datum is transmitted to the local CE be connected with receiving terminal PE by the forwarding information in transmitting according to tunnel group, the L2VPN business datum that other PSN tunnel forward abandons.
9. method according to claim 4, is characterized in that, described step C) also comprise afterwards:
Tunnel group transmit in a PSN tunnel through its testing mechanism detect become invalid time, then judge that whether described PSN tunnel is last effective tunnel of described tunnel group; If so, then delete this tunnel group to transmit;
If not, then judgement process is carried out to the mode of operation of described tunnel group:
If pattern received by single-shot list, then from other effective PSN tunnel of described tunnel group, select a tunnel that priority is the highest as the L2VPN service bearer tunnel with the group binding of described tunnel, the L2VPN business datum that receiving terminal PE receiving end/sending end PE sends;
If multiple choosing receipts pattern, then send information with other effective PSN tunnel of tunnel group, and determine that PSN tunnel is received as choosing in a tunnel that priority is the highest, receiving terminal PE receives the L2VPN business datum that PSN tunnel transmission is received in the choosing determined.
10. method according to claim 4, it is characterized in that, described step C) also comprise afterwards: a PSN tunnel in described tunnel group is when the detection of its testing mechanism becomes effective, then judge whether described tunnel group exists tunnel group and transmit, if do not exist, then create described tunnel group and transmit;
If exist, then judgement process is carried out to the mode of operation of described tunnel group:
If pattern received by single-shot list, then from all effective PSN tunnel of described tunnel group, select a tunnel that priority is the highest as the L2VPN service bearer tunnel with the group binding of described tunnel, the L2VPN business datum that receiving terminal PE receiving end/sending end PE sends;
If multiple choosing receipts pattern, then send information with effective PSN tunnel that described tunnel group is all, and determine that PSN tunnel is received as choosing in a tunnel that priority is the highest, receiving terminal PE receives the L2VPN business datum that PSN tunnel transmission is received in the choosing determined.
Use the device of tunnel group transmission L2VPN business in 11. 1 kinds of MPLS, it is characterized in that: comprising:
Setting up module, for setting up tunnel group between transmitting terminal PE and receiving terminal PE, making the PSN tunnel of the one or more identical or different type in MPLS add described tunnel group;
Binding module: for by a L2VPN business and the group binding of described tunnel, and from the described tunnel group of described L2VPN business-binding select the PSN tunnel that is used for carrying described L2VPN business;
Transport module, the transmission that transmitting terminal PE and receiving terminal PE utilizes the PSN tunnel selected from described tunnel group to realize described L2VPN business;
Wherein, if the mode of operation of described tunnel group is multiple choosing receipts pattern, then transmitting terminal PE effective PSN tunnel each in described tunnel group sends information, and receiving terminal PE selects the described L2VPN business datum received the highest effective PSN tunnel of described PSN tunnel group medium priority and send;
Wherein, described MPLS is negotiate marking commutation, and described L2VPN is virtual private network in second layer network, and described PE is service provider's edge equipment, and described PSN is packet network.
12. devices according to claim 11, is characterized in that, described module of setting up also comprises:
First arranges module, for arranging tunnel group number for described tunnel group, for each PSN tunnel in described tunnel group is set using priority; And be that single-shot list is received pattern or multiple choosing and received pattern for described tunnel group arranges mode of operation.
13. devices according to claim 12, is characterized in that, described module of setting up also comprises:
Second arranges module, for the PSN tunnel in described tunnel group arranges the usage flag of affiliated tunnel group; Form built tunnel group for described tunnel to transmit; For each PSN tunnel in described tunnel group arranges the detection for detecting tunnel validity.
14. devices according to claim 11, is characterized in that, described transport module comprises:
Sending module, the L2VPN business datum that the local CE be attached thereto uploads is forwarded to receiving terminal PE by transmitting terminal PE;
Receiver module, the L2VPN business datum that receiving terminal PE receiving end/sending end PE is sent by described tunnel group;
Wherein, described CE is customer edge.
15. devices according to claim 14, is characterized in that, described sending module comprises:
Package module, the described L2VPN business datum that local CE uploads by transmitting terminal PE carries out PW encapsulation;
First judges mould processing block, and transmitting terminal PE pair is carried out judgement with the mode of operation of the tunnel group of described L2VPN business-binding and process:
If pattern received by single-shot list, then transmit the bearing tunnel of the highest effective PSN tunnel of middle selection priority as L2VPN business datum from the tunnel group corresponding to described tunnel group, and by tunneling technique, outer layer tunnel encapsulation is carried out to the L2VPN business datum of carrying out described PW encapsulation, then packaged data are sent to receiving terminal PE;
If multiple choosing receipts pattern, then the effective PSN tunnel in transmitting by the tunnel group corresponding to described tunnel group respectively carries out outer layer tunnel encapsulation to the L2VPN business datum of carrying out described PW encapsulation, and is sent to receiving terminal PE;
Described receiver module comprises:
Second judging treatmenting module, receiving terminal PE is receiving in the L2VPN business datum process sent by PSN tunnel from described transmitting terminal PE, judge whether PSN tunnel has the usage flag for tunnel group, and whether only have one deck for the MPLS label of PW, and L2VPN business corresponding to described PW whether with the group binding of described tunnel;
Be all yes if above-mentioned, then again judgement process carried out to the mode of operation of described tunnel group:
If pattern received by single-shot list, then receiving terminal PE receives L2VPN business datum, and L2VPN business datum is transmitted to the local CE be attached thereto by the forwarding information in transmitting according to tunnel group;
If multiple choosing receipts pattern, then receiving terminal PE receives only the L2VPN business datum that PSN tunnel transmission is received in group medium priority the highest choosing in described tunnel, and L2VPN business datum is transmitted to the local CE be connected with receiving terminal PE by the forwarding information in transmitting according to tunnel group, the L2VPN business datum that other PSN tunnel forward abandons;
Wherein, described PW is pseudo-line.
16. devices according to claim 13, is characterized in that, also comprise:
3rd judging treatmenting module, tunnel group transmit in a PSN tunnel through its testing mechanism detect become invalid time, then judge that whether described PSN tunnel is last effective tunnel of described tunnel group; If so, then delete this tunnel group to transmit;
If not, then judgement process is carried out to the mode of operation of described tunnel group:
If pattern received by single-shot list, then from other effective PSN tunnel of described tunnel group, select a tunnel that priority is the highest as the L2VPN service bearer tunnel with the group binding of described tunnel, the L2VPN business datum that receiving terminal PE receiving end/sending end PE sends;
If multiple choosing receipts pattern, then send information with other effective PSN tunnel of tunnel group, and determine that PSN tunnel is received as choosing in a tunnel that priority is the highest, receiving terminal PE receives the L2VPN business datum that PSN tunnel transmission is received in the choosing determined;
4th judging treatmenting module, a PSN tunnel in described tunnel group when the detection of its testing mechanism becomes effective, then judges whether described tunnel group exists tunnel group and transmit, if do not exist, then creates described tunnel group and transmit;
If exist, then judgement process is carried out to the mode of operation of described tunnel group:
If pattern received by single-shot list, then from all effective PSN tunnel of described tunnel group, select a tunnel that priority is the highest as the L2VPN service bearer tunnel with the group binding of described tunnel, the L2VPN business datum that receiving terminal PE receiving end/sending end PE sends;
If multiple choosing receipts pattern, then send information with effective PSN tunnel that described tunnel group is all, and determine that PSN tunnel is received as choosing in a tunnel that priority is the highest, receiving terminal PE receives the L2VPN business datum that PSN tunnel transmission is received in the choosing determined.
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| CN201110025924.3A CN102065020B (en) | 2011-01-24 | 2011-01-24 | Method and device for transmitting L2VPN service by using tunnel group in MPLS network |
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| CN102301657B (en) * | 2011-06-30 | 2013-10-09 | 华为技术有限公司 | Tunnel configuration method and device |
| CN102263699B (en) * | 2011-08-15 | 2014-12-24 | 杭州华三通信技术有限公司 | Load balancing implementation method and device applied to MPLS TP (multiprotocol label switch transport profile) |
| CN102299864B (en) * | 2011-10-08 | 2014-11-26 | 杭州华三通信技术有限公司 | Method and device applied to message forwarding of two-layer virtual private network |
| CN103812745B (en) * | 2012-11-06 | 2017-10-03 | 新华三技术有限公司 | Pseudo-wire creation method and carrier network edge device in L2VPN networks |
| CN111327505B (en) * | 2018-12-13 | 2021-12-14 | 中国电信股份有限公司 | Tunnel-based communication method and communication device |
| CN109450793B (en) * | 2018-12-18 | 2021-07-16 | 锐捷网络股份有限公司 | Method and device for scheduling service traffic |
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|---|---|---|---|---|
| CN1874296A (en) * | 2005-10-13 | 2006-12-06 | 华为技术有限公司 | Transmission method for transmitting message of virtual private network in second layer through labels in multiple protocols |
| CN101594289A (en) * | 2008-05-28 | 2009-12-02 | 华为技术有限公司 | Realize the method and apparatus of Differentiated Services traffic engineering |
| CN101617305A (en) * | 2007-01-17 | 2009-12-30 | 北方电讯网络有限公司 | Use is based on the border gateway protocol procedures tunnel, that be used for MPLS and layer 2 VPN of Ethernet |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US20040177157A1 (en) * | 2003-02-13 | 2004-09-09 | Nortel Networks Limited | Logical grouping of VPN tunnels |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1874296A (en) * | 2005-10-13 | 2006-12-06 | 华为技术有限公司 | Transmission method for transmitting message of virtual private network in second layer through labels in multiple protocols |
| CN101617305A (en) * | 2007-01-17 | 2009-12-30 | 北方电讯网络有限公司 | Use is based on the border gateway protocol procedures tunnel, that be used for MPLS and layer 2 VPN of Ethernet |
| CN101594289A (en) * | 2008-05-28 | 2009-12-02 | 华为技术有限公司 | Realize the method and apparatus of Differentiated Services traffic engineering |
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