CN101848199A - Method for implementing layering virtual link, system and transmission equipment thereof - Google Patents
Method for implementing layering virtual link, system and transmission equipment thereof Download PDFInfo
- Publication number
- CN101848199A CN101848199A CN200910119774A CN200910119774A CN101848199A CN 101848199 A CN101848199 A CN 101848199A CN 200910119774 A CN200910119774 A CN 200910119774A CN 200910119774 A CN200910119774 A CN 200910119774A CN 101848199 A CN101848199 A CN 101848199A
- Authority
- CN
- China
- Prior art keywords
- bearing bed
- operation layer
- equipment
- packet
- label
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Landscapes
- Data Exchanges In Wide-Area Networks (AREA)
Abstract
The embodiment of the invention provides a method for implementing a layering virtual link PW, a system and transmission equipment thereof, belonging to the network communication technical field. The method comprises the following steps: establishing two or more than two virtual link PW layers, wherein, the PW of an upper layer is a business layer PW, and the PW of a lower layer is a bearing layer PW; and then transmitting a plurality of received data packets on the multiple business layers PW through the bearing layer PW. In the invention, by adopting layering PW transmission in a PW switching network, intermediate switching nodes of the end-to-end PW do not need to maintain excessive switching entries and related protocol states, thus reducing the signaling protocol statuses and the quantity of the switching entries maintained by the switching nodes of the bearing layer PW, lowering requirements on equipment and improving network expansibility.
Description
Technical field
The present invention relates to network communications technology field, particularly relate to a kind of realization stratification virtual link (Pseudo Wire, method and system PW) and transfer equipment.
Background technology
VLL (Virtual Leased Line, VLL) be a kind of based on multiprotocol label switching (Multi protocol Label Switching, MPLS) and the two-layer virtual private network of ethernet technology (layer 2Virtual Private Network, L2VPN) technology is used to carry out the L2VPN type of service of point to point system.It need (Provider Edge sets up end to end the PW tunnel between PE) and carries out business and transmit at two provider edge equipments.PW need set up by the operation signaling protocol, between the different signalings territory of some occasion such as cross operator (different operators adopts different signaling protocols to set up PW) or same operator, can not set up PW end to end, and can only in each signaling territory, set up PW piecemeal, and carry out PW exchange (PW Switch) at the edge device of each section.
Exchange table entries owing to need set up PW at the switching node of PW Swtich if adopt the mode of manual static configuration, will influence the arrangement and the maintainability of network.Therefore, to the existing signaling protocol of setting up PW, as tag distribution protocol (Label Distribution Protocol, LDP), Border Gateway Protocol (Border Gateway Protocol, BGP) expand, increase and transmit destination information, and carry out protocol processes by each switching node, the PW exchange table entries of each switching node of multistage PW be can set up automatically, configuration and maintenance made things convenient for.
In realizing process of the present invention, the inventor finds above-mentioned technology, and there are the following problems:
By the end-to-end PW that the PW exchange is set up, therefore each switching node handles complexity owing to need exchange table entries and the relevant signaling protocol state of every PW of maintenance, and to the equipment requirements height, extension of network is bad.
Summary of the invention
Given this, the embodiment of the invention provides a kind of method and system and transfer equipment of realizing stratification PW, can improve the autgmentability of network.
Concrete, a kind of method that realizes the stratification virtual link that the embodiment of the invention provides comprises: set up the virtual link PW of two or more levels, the PW on upper strata is operation layer PW, and the PW of lower floor is bearing bed PW; A plurality of packets of many operation layer PW receiving are transmitted by a bearing bed PW.
A kind of system that realizes the stratification virtual link that the embodiment of the invention provides, comprising: level is set up the unit, sets up the virtual link PW of two or more levels, and the PW on upper strata is operation layer PW, and the PW of lower floor is bearing bed PW; Transmitting apparatus is used for a plurality of packets on many operation layer PW are sent to transfer equipment; Transfer equipment, the described a plurality of packets that are used for receiving transmit by a bearing bed PW.
A kind of transfer equipment of realizing the stratification virtual link that the embodiment of the invention provides comprises: receiving element is used to receive a plurality of packets on many operation layer PW; The bearing bed determining unit is used for determining bearing bed PW according to the vpn label of each packet that receives; Converge encapsulation unit, be used for described a plurality of packets are converged, and the packet after converging encapsulated again the vpn label of described bearing bed PW; Delivery unit is used for the packet that converges after the encapsulation is sent out by described bearing bed PW; Wherein, described bearing bed PW and described operation layer PW are the virtual link PW of two or more levels of foundation, and the PW on upper strata is operation layer PW, and the PW of lower floor is bearing bed PW.
The technical scheme that is provided by the above embodiment of the invention as can be known, by setting up the virtual link PW of two or more levels, the PW on upper strata is operation layer PW, the PW of lower floor is bearing bed PW, a plurality of packets of many operation layer PW receiving are transmitted by a bearing bed PW, make the middle switching node of bearing bed PW not need again signaling protocol state and the exchange table entries of maintenance service layer PW, compared with prior art, the signaling protocol state that bearing bed PW switching node safeguarded and the quantity of exchange table entries have been reduced, reduced requirement, therefore can improve the autgmentability of network equipment.
Description of drawings
In order to be illustrated more clearly in the embodiment of the invention or technical scheme of the prior art, to do to introduce simply to the accompanying drawing of required use in embodiment or the description of the Prior Art below, apparently, accompanying drawing in describing below only is some embodiments of the present invention, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain other accompanying drawing according to these accompanying drawings.
A kind of method flow schematic diagram of realizing stratification PW that Fig. 1 provides for the embodiment of the invention;
The networking schematic diagram of a kind of stratification PW that Fig. 2 provides for the embodiment of the invention;
Fig. 3 handles schematic diagram for the signaling chain of command of the stratification PW that the embodiment of the invention provides;
The error protection schematic diagram of the stratification PW that Fig. 4 provides for the embodiment of the invention;
A kind of structural representation of realizing the system of stratification virtual link that Fig. 5 provides for the embodiment of the invention;
Fig. 6 sets up the structural representation of unit and transfer equipment for Fig. 5 level under the transparent transmission mode;
Fig. 7 sets up the structural representation of unit and transfer equipment for Fig. 5 level under access way;
A kind of structure chart of realizing the transfer equipment of stratification virtual link that Fig. 8 provides for the embodiment of the invention.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the invention, the technical scheme in the embodiment of the invention is clearly and completely described, obviously, described embodiment only is the present invention's part embodiment, rather than whole embodiment.Based on the embodiment among the present invention, those of ordinary skills belong to the scope of protection of the invention not making the every other embodiment that is obtained under the creative work prerequisite.
Referring to Fig. 1, a kind of method that realizes the stratification virtual link that the embodiment of the invention provides comprises:
Step 11 is set up the virtual link PW of two or more levels, and the PW on upper strata is operation layer PW, and the PW of lower floor is bearing bed PW;
The method of the realization stratification virtual link that the embodiment of the invention provides, by setting up the virtual link PW of two or more levels, the PW on upper strata is operation layer PW, the PW of lower floor is bearing bed PW, a plurality of packets of many operation layer PW receiving are transmitted by a bearing bed PW, make the middle switching node of bearing bed PW not need again signaling protocol state and the exchange table entries of maintenance service layer PW, compared with prior art, the signaling protocol state that bearing bed PW switching node safeguarded and the quantity of exchange table entries have been reduced, reduced requirement, therefore can improve the autgmentability of network equipment.
Fig. 2 is the networking schematic diagram of a kind of stratification PW of the present invention's foundation.As shown in Figure 2, CE is customer edge (Custom Edge), UPE is the PE equipment (User facing-Provider Edge) of user oriented side, NPE is the PE equipment (Network Provider Edge) of network core, and SPE is PW switching node (Switching Provider Edge).Business datum between the user transmits by the PW of stratification, wherein the PW switching tunnel of each PW for setting up automatically by the signaling (for example LDP, BGP etc.) of expansion.For the sake of simplicity, set up the virtual link PW of two levels in Fig. 2, the PW on upper strata is operation layer PW, and the PW of lower floor is bearing bed PW, and the level of certain PW is not limited only to two-layer, also can be multilayer.Corresponding diagram 2 is set up operation layer PW between the UPE, set up bearing bed PW between the NPE, and a plurality of PW switching node SPE can be arranged respectively between UPE and NPE and NPE and the NPE.
In realizing that stratification PW uses, the data of many operation layer PW transmission can converge to a shared bearing bed PW and transmit.Like this, PW switching node SPE in the middle of bearing bed PW does not need signaling protocol state and the exchange table entries of maintenance service layer PW again, and only need signaling protocol state and the exchange table entries of maintaining loading layer PW, thus can reduce requirement greatly to SPE equipment, improve the autgmentability of network.
The mode of setting up stratification PW has two kinds: transparent transmission mode and access way.
Under the transparent transmission mode, between two first equipment, set up bearing bed PW by the expanded signalling agreement; Stride through above-mentioned first equipment, between two second equipment, set up operation layer PW by the expanded signalling agreement; Wherein, on described two first equipment, set up the mapping relations of described bearing bed PW and described operation layer PW respectively.
Under the access way, between two first equipment, set up bearing bed PW by signaling protocol or expanded signalling agreement; Set up operation layer PW respectively by signaling protocol or expanded signalling agreement between two second connected first equipment of equipment; Wherein, on described two first equipment, distribute a multiprotocol label switching MPLS label respectively and the operation layer PW that sets up with end corresponding, and by signaling protocol or expanded signalling agreement to the described corresponding relation of opposite end first devices advertise.
Corresponding diagram 2, this first equipment is NPE, this second equipment is UPE.As shown in Figure 2, under the transparent transmission mode, operation layer PW sets up between UPE and UPE, and business datum is transmitted in bearing bed PW by transparent enclosure, and the MPLS label of operation layer PW correspondence does not change.And under the access way, operation layer PW sets up respectively between bearing bed PW both sides UPE and NPE, and distributes a new MPLS label to shine upon mutually with the operation layer PW that goes into termination respectively by the two-end-point NPE of bearing bed PW.Two end points NPE of bearing bed PW can (set up mapping item by signaling protocol by manual mode (manual configuration mapping item) or automated manner, for example LDP, BGP etc.) distribute the MPLS label, and the mapping relations of preserving the operation layer PW of this MPLS label and access.
These two kinds differences of setting up mode are: the transparent transmission mode is applicable in the identical signaling of different operators territory, or in the same operator internal network, set up end-to-end PW by the expanded signalling agreement, the MPLS label of operation layer PW correspondence does not change, and does not need the corresponding relation of consultation business service layer PW and innermost layer label between the NPE at bearing bed PW two ends; And access way is applicable to the different frontiers in same operator, perhaps in the network of the different signalings of different operators territory, set up the operation layer PW that UPE holds the NPE end by signaling protocol or expanded signalling agreement, two-end-point NPE at bearing bed PW need distribute a new MPLS label respectively for operation layer PW, and consults corresponding relation with maintenance service layer PW and innermost layer label by signaling protocol.
On signaling control aspect, at first, LDP by expansion between NPE and NPE or bgp protocol (or other) are set up the bearing bed PW based on the PW exchange, secondly, set up operation layer PW according to transparent transmission and access dual mode, and at the NPE place (bearing bed PW two-end-point) sets up the mapping relations of bearing bed PW and operation layer PW, for example mapping table according to signaling protocol.This mapping table disposes dual mode, and a kind of is directly to bind operation layer PW and corresponding bearing bed PW; A kind of is the PW that has disposed a lot of levels earlier, when setting up operation layer PW, seek the PW of pairing next level automatically by software, and bind as the bearing bed PW of this operation layer PW, can number show the relation that converges of multi-level PW this moment by a level.
Fig. 3 is that the signaling chain of command of stratification PW provided by the invention is handled schematic diagram.As shown in Figure 3, under the transparent transmission mode, bearing bed PW LDP or BGP by expansion between NPE sets up, and sees through these two NPE, and operation layer PW sets up at LDP or the BGP by expansion between the UPE of described bearing bed PW both sides respectively.According to the destination information in the message, when the packet of determining operation layer will transmit by bearing bed PW, enable the aggregation feature of bearing bed PW when NPE receives the signaling protocol message of expansion, with bearing bed PW as next PW that jumps out mouthful.
Need to prove, the signaling protocol of expansion knows which PW the destination has can be used as intermediate point, these PW also comprise the bearing bed PW that the present invention sets up, selecting type is that the PW of bearing bed type is as next PW, if when having a plurality of such bearing bed PW to arrive the destination, can be based on certain algorithm, priority algorithm for example selects to have the bearing bed PW of limit priority.
In the signaling protocol of expansion, peer IP address is made as opposite end NPE, and continuation sends this signaling protocol message, at this moment, this message is not handled on the switching node SPE in the middle of two NPE, and only on the NPE of opposite end, can set up exchange table entries with described operation layer PW according to the destination information in the described message, carry out the mapping of operation layer PW and corresponding bearing bed PW with this.
Still referring to Fig. 3, under access way, by LDP or BGP, perhaps LDP or the BGP by expansion sets up bearing bed PW between NPE, and in bearing bed PW both sides, operation layer the PW LDP by expansion or BGP (or other) between UPE and NPE set up respectively.At this moment, the two-end-point NPE of bearing bed PW need distribute a new MPLS label corresponding with the operation layer PW that goes into termination respectively, and by LDP or BGP or LDP or BGP by expansion this corresponding relation is announced mutually between NPE and the NPE, carry out the mapping of operation layer PW and corresponding bearing bed PW with this, so that forwarding plane is when receiving the data of operation layer PW, the innermost layer label when the MPLS label that distributes is used for bearing bed PW and transmits.
Corresponding to signaling control aspect, on the data forwarding aspect, the data of many operation layer PW transmit by a bearing bed PW also two kinds of processing modes:
Under the transparent transmission mode, when a plurality of packets of many operation layer PW are arrived on same end first equipment of bearing bed PW by an end second equipment, determine bearing bed PW according to the vpn label of each packet; Mapping relations according to bearing bed PW and operation layer PW converge a plurality of packets, for the packet after converging heavily encapsulates the vpn label of described bearing bed PW, and converge opposite end first equipment that packet is sent to described bearing bed PW after will encapsulating; The described packet that converges of decapsulation on first equipment of the opposite end of described bearing bed PW is determined separately operation layer PW according to the innermost layer label of each packet, and each packet is sent to opposite end second equipment of corresponding service layer PW separately.
Under the access way, when a plurality of packets of many operation layer PW are arrived on same end first equipment of bearing bed PW by an end second equipment, determine bearing bed PW according to the vpn label of each packet, and according to the MPLS label of the innermost layer label lookup operation layer PW correspondence of each packet; According to bearing bed PW that determines and the MPLS label that finds out, a plurality of packets are converged, for the packet after converging heavily encapsulates the vpn label of described MPLS label and described bearing bed PW, and converge opposite end first equipment that packet is sent to described bearing bed PW after will encapsulating; The described packet that converges of decapsulation on first equipment of the opposite end of described bearing bed PW according to described each packet of MPLS label lookup opposite end operation layer PW separately, and is sent to opposite end second equipment of corresponding service layer PW separately with each packet.
Corresponding to shown in Figure 3, above-mentioned first equipment is NPE, and second equipment is UPE.
In troubleshooting, the troubleshooting of PW switching network generally realizes by active and standby PW, promptly sets up two PW from the end node of PW, wherein a conduct master uses PW, transmit customer service, when the master uses PW because of the network failure cisco unity malfunction, switch to standby PW and carry out the business transmission.Handoff procedure can combine with fault detection technique commonly used, detect (bidirectional forwarding detection as two-way forwarding, BFD) LSP or PW, or ethernet operation maintenance and management OAM 802.1ag etc., to reach the purpose of quick switching.
In the application of stratification PW, the present invention adopts active and standby PW to protect equally, and bearing bed PW and operation layer PW can set up corresponding standby PW and protect main fault with PW.The processing that need carry out is that the fault of bearing bed PW will have influence on the protection switching of all related with it operation layer PW.
The error protection schematic diagram of the stratification PW that Fig. 4 provides for the embodiment of the invention, as shown in Figure 4, in bearing bed PW fault and when having standby bearing bed PW, the data of all operation layer PW that will be related with described bearing bed PW switch on the standby bearing bed PW and transmit; In bearing bed PW fault and when not having standby bearing bed PW, the data of all operation layer PW that will be related with described bearing bed PW switch to respectively on the corresponding standby operation layer PW and transmit.
Particularly, for bearing bed PW fault and there is not the situation of standby bearing bed PW, under the transparent transmission mode, if UPE, NPE fault, operation layer PW is in unactivated state (being the DOWN state), and will trigger working traffic layer PW and switch to standby operation layer PW this moment; If during the bearing bed PW fault between NPE and the NPE, need all related with it operation layer PW are put DOWN, perhaps with the connective agreement of fault message by PW, virtual circuit detection of connectivity (Virtual Circuit Connection Verification for example, VCCV) be delivered to UPE, switch to standby operation layer PW transmission data thereby trigger working traffic layer PW.Under the access way, when UPE, NPE fault, fault need be sent to opposite end NPE, the connective agreement of opposite end NPE by PW for example VCCV is delivered to opposite end NPE, and is delivered to opposite end UPE, triggers UPE and carries out the switching of PW; During bearing bed PW fault, all operation layer PW that need two ends are associated put DOWN, perhaps the connective agreement (VCCV) of fault message by PW are delivered to UPE, switch to standby operation layer PW respectively and transmit data thereby trigger all working traffic layer PW.
For bearing bed PW fault and there is the situation of standby bearing bed PW, the data of all operation layer PW only need switch to standby bearing bed PW, by standby bearing bed PW data are sent to opposite end NPE.
The embodiment of the invention is by making up stratification PW, PW by stratification in the PW switching network transmits, make the middle switching node of bearing bed PW not need again signaling protocol state and the exchange table entries of maintenance service layer PW, compared with prior art, the signaling protocol state that bearing bed PW switching node safeguarded and the quantity of PW exchange table entries have been reduced, reduced requirement, improved the autgmentability of network equipment.
Need to prove,, also solved the problem of under same operator many signalings territory or multi-operator are striden the situation in signaling territory, setting up end-to-end PW simultaneously the stratification PW that access way is set up.
Referring to Fig. 5, the embodiment of the invention also provides a kind of system that realizes the stratification virtual link, comprising:
Level is set up unit 51, sets up the virtual link PW of two or more levels, and the PW on upper strata is operation layer PW, and the PW of lower floor is bearing bed PW;
Transmitting apparatus 52 is used for a plurality of packets on many operation layer PW are sent to transfer equipment;
Corresponding to above-mentioned transparent transmission mode, referring to Fig. 6, this level is set up unit 51 and is comprised:
First bearing bed is set up unit 511, is used for setting up bearing bed PW by the expanded signalling agreement between two first equipment;
First operation layer is set up unit 512, be used to stride through two described first equipment, between two second equipment, set up operation layer PW, wherein, on described two first equipment, set up the mapping relations of described bearing bed PW and described operation layer PW respectively by the expanded signalling agreement.
And this transfer equipment 53 comprises:
First receiving element 531 is used to receive a plurality of packets on many operation layer PW that described transmitting apparatus sends;
The first bearing bed determining unit 532 is used for determining bearing bed PW according to the vpn label of each packet that receives;
First converges encapsulation unit 533, is used for described a plurality of packets are converged, and the packet after converging is encapsulated again the vpn label of described bearing bed PW;
First delivery unit 534 is used for the packet that converges after the encapsulation is sent out by described bearing bed PW.
Concrete stratification method for building up and data transferring method can be referring to the descriptions of aforementioned transparent transmission mode.
Corresponding to access way, referring to Fig. 7, this level is set up unit 51 and is comprised:
Second bearing bed is set up unit 516, is used for setting up bearing bed PW by signaling protocol or expanded signalling agreement between two first equipment;
Second operation layer is set up unit 517, is used to connect two described first equipment, sets up operation layer PW respectively by signaling protocol or expanded signalling agreement between two second connected first equipment of equipment;
Label distribution unit 518, the operation layer PW that is used for distributing respectively a multiprotocol label switching MPLS label and sets up with end on described two first equipment is corresponding, and by signaling protocol or expanded signalling agreement to the described corresponding relation of opposite end first devices advertise.
And this transfer equipment 53 comprises:
Second receiving element 535 is used to receive a plurality of packets of many operation layer PW that described transmitting apparatus sends;
The second bearing bed determining unit 536 is used for determining bearing bed PW according to the vpn label of each packet that receives;
Label lookup unit 537 is used for according to the innermost layer label lookup of each packet MPLS label of operation layer PW correspondence separately;
Second converges encapsulation unit 538, is used for described a plurality of packets are converged, and encapsulates vpn label and the described MPLS label of described bearing bed PW again for the packet after converging;
Second delivery unit 539 is used for the packet that converges after the encapsulation is sent out by described bearing bed PW.
Concrete stratification method for building up and data transferring method can be referring to the descriptions of aforementioned access way.
In troubleshooting, the present invention adopts active and standby PW to protect equally, and bearing bed PW and operation layer PW can set up corresponding standby PW and protect main fault with PW.The processing that need carry out is that the fault of bearing bed PW will have influence on the protection switching of all related with it operation layer PW.
Still referring to Fig. 5, described level is set up unit 51 and is also comprised:
Spare level is set up unit 515, is used to set up standby operation layer PW; And/or, set up standby bearing bed PW.
Correspondingly, system embodiment provided by the invention also comprises:
Be understandable that, the system of the realization stratification virtual link that the embodiment of the invention provides, described first equipment of setting up bearing bed PW can be corresponding to the PE equipment NPE of network core, and described second equipment of setting up operation layer PW can be corresponding to the PE equipment UPE of user oriented side.
To sum up, the system of the realization stratification virtual link that the embodiment of the invention provides, set up the virtual link PW that two or more levels are set up in the unit by level, the PW on upper strata is operation layer PW, the PW of lower floor is bearing bed PW, by a plurality of packets of transmitting apparatus on many operation layer PW of transfer equipment transmission, a plurality of packets of many operation layer PW that will be received by transfer equipment transmit by a bearing bed PW, make the middle switching node of bearing bed PW not need again signaling protocol state and the exchange table entries of maintenance service layer PW, compared with prior art, the signaling protocol state that bearing bed PW switching node safeguarded and the quantity of PW exchange table entries have been reduced, reduced requirement, improved extension of network equipment.
Referring to Fig. 8, the embodiment of the invention also provides a kind of transfer equipment of realizing the stratification virtual link, comprising:
Receiving element 81 is used to receive a plurality of packets on many operation layer PW;
Bearing bed determining unit 82 is used for determining bearing bed PW according to the vpn label of each packet that receives;
Converge encapsulation unit 83, be used for described a plurality of packets are converged, and the packet after converging encapsulated again the vpn label of described bearing bed PW;
Delivery unit 84 is used for the packet that converges after the encapsulation is sent out by described bearing bed PW;
Wherein, described bearing bed PW and described operation layer PW are the virtual link PW of two or more levels of foundation, and the PW on upper strata is operation layer PW, and the PW of lower floor is bearing bed PW.
A kind of embodiment, described transfer equipment also comprises:
Label lookup unit 80 is used for according to the innermost layer label lookup of each packet multiprotocol label switching MPLS label of operation layer PW correspondence separately;
The described encapsulation unit that converges is further used for encapsulating described MPLS label again for the packet after converging; Wherein, described MPLS label for distribute with the corresponding label of setting up with end of operation layer PW, and announce described corresponding relation to the opposite end of described bearing bed PW transfer equipment by signaling protocol or expanded signalling agreement.
For the transparent transmission mode, between two first equipment, set up bearing bed PW by the expanded signalling agreement, stride through two described first equipment, between two second equipment, set up operation layer PW, and on described two first equipment, set up the mapping relations of described bearing bed PW and described operation layer PW respectively by the expanded signalling agreement.
For access way, between two first equipment, set up bearing bed PW by signaling protocol or expanded signalling agreement, connect two described first equipment, between two second connected first equipment of equipment, set up operation layer PW respectively by signaling protocol or expanded signalling agreement, and the operation layer PW that distributes a multiprotocol label switching MPLS label respectively and set up with end on described two first equipment is corresponding, and by signaling protocol or expanded signalling agreement to the described corresponding relation of opposite end first devices advertise.
Be understandable that under the transparent transmission mode, business datum is transmitted in bearing bed PW by transparent enclosure, the MPLS label of operation layer PW correspondence does not change.And under the access way, distribute a new MPLS label to shine upon mutually respectively with the operation layer PW that goes into termination by the two-end-point of bearing bed PW.
The transfer equipment of the realization stratification virtual link that the embodiment of the invention provides, a plurality of packets by many operation layer PW that will receive transmit by a bearing bed PW, make the middle switching node of bearing bed PW not need again signaling protocol state and the exchange table entries of maintenance service layer PW, compared with prior art, the signaling protocol state that bearing bed PW switching node safeguarded and the quantity of exchange table entries have been reduced, reduced requirement, therefore can improve the autgmentability of network equipment.
Need to prove that the form that the method in the embodiment of the invention can software function module realizes, and this software function module can be stored in also in the computer read/write memory medium as production marketing independently or when using.Each functional unit in the embodiment of the invention can be integrated in the processing module, also can be that the independent physics in each unit exists, and also can be integrated in the module two or more unit.Above-mentioned integrated module both can adopt the form of hardware to realize, also can adopt the form of software function module to realize.If described integrated module realizes with the form of software function module and during as independently production marketing or use, also can be stored in the computer read/write memory medium.The above-mentioned storage medium of mentioning can be a read-only memory, disk or CD etc.
Above-mentioned specific embodiment is not in order to restriction the present invention; for those skilled in the art; all under the prerequisite that does not break away from the principle of the invention, any modification of being done, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (16)
1. a method that realizes the stratification virtual link is characterized in that, comprising:
Set up the virtual link PW of two or more levels, the PW on upper strata is operation layer PW, and the PW of lower floor is bearing bed PW;
A plurality of packets on many operation layer PW that receive are transmitted by a bearing bed PW.
2. the method for claim 1 is characterized in that, the described virtual link PW that sets up two or more levels, and the PW on upper strata is operation layer PW, the PW of lower floor is that bearing bed PW specifically comprises:
Between two first equipment, set up bearing bed PW by the expanded signalling agreement;
Stride through two described first equipment, between two second equipment, set up operation layer PW by the expanded signalling agreement; Wherein, on described two first equipment, set up the mapping relations of described bearing bed PW and described operation layer PW respectively.
3. method as claimed in claim 2 is characterized in that, a plurality of packets on described many operation layer PW that will receive transmit specifically by a bearing bed PW and comprise:
Receive a plurality of packets of many operation layer PW;
Vpn label according to each packet that receives is determined bearing bed PW;
Described a plurality of packets are converged, and for the packet after converging encapsulates the vpn label of described bearing bed PW again, and the packet that converges after will encapsulating sends out by described bearing bed PW.
4. the method for claim 1 is characterized in that, the described virtual link PW that sets up two or more levels, and the PW on upper strata is operation layer PW, the PW of lower floor is specially for bearing bed PW:
Between two first equipment, set up bearing bed PW by signaling protocol or expanded signalling agreement;
Connect two described first equipment, between two second connected first equipment of equipment, set up operation layer PW respectively by signaling protocol or expanded signalling agreement;
Wherein, on two described first equipment, distribute a multiprotocol label switching MPLS label respectively and the operation layer PW that sets up with end corresponding, and by signaling protocol or expanded signalling agreement to the described corresponding relation of opposite end first devices advertise.
5. method as claimed in claim 4 is characterized in that, a plurality of packets on described many operation layer PW that will receive transmit by a bearing bed PW and are specially:
Receive a plurality of packets of many operation layer PW;
Determine the bearing bed PW of each packet according to the vpn label of each packet that receives;
According to the innermost layer label lookup of each packet that the receives MPLS label of operation layer PW correspondence separately;
Described a plurality of packets are converged, and for the packet after converging encapsulates vpn label and the described MPLS label of described bearing bed PW again, and the packet that converges after will encapsulating sends out by described bearing bed PW.
6. as claim 2 or 4 described methods, it is characterized in that, the described virtual link PW that sets up two or more levels, the PW on upper strata is operation layer PW, the PW of lower floor is that bearing bed PW also comprises:
Set up standby operation layer PW; And/or,
Set up standby bearing bed PW.
7. method as claimed in claim 6 is characterized in that, the described virtual link PW that sets up two or more levels, and the PW on upper strata is operation layer PW, the PW of lower floor is that bearing bed PW also comprises:
In described bearing bed PW fault and when having standby bearing bed PW, the data of all operation layer PW that will be related with described bearing bed PW switch on the described standby bearing bed PW and transmit; Perhaps,
In described bearing bed PW fault and when not having standby bearing bed PW, the data of all operation layer PW that will be related with described bearing bed PW switch to respectively on the corresponding described standby operation layer PW and transmit.
8. a system that realizes the stratification virtual link is characterized in that, comprising:
Level is set up the unit, sets up the virtual link PW of two or more levels, and the PW on upper strata is operation layer PW, and the PW of lower floor is bearing bed PW;
Transmitting apparatus is used for a plurality of packets on many operation layer PW are sent to transfer equipment;
Transfer equipment, the described a plurality of packets that are used for receiving transmit by a bearing bed PW.
9. system as claimed in claim 8 is characterized in that, described level is set up the unit and specifically comprised:
First bearing bed is set up the unit, is used for setting up bearing bed PW by the expanded signalling agreement between two first equipment;
First operation layer is set up the unit, be used to stride through two described first equipment, between two second equipment, set up operation layer PW, wherein, on described two first equipment, set up the mapping relations of described bearing bed PW and described operation layer PW respectively by the expanded signalling agreement.
10. system as claimed in claim 9 is characterized in that, described transfer equipment specifically comprises:
First receiving element is used to receive a plurality of packets on many operation layer PW that described transmitting apparatus sends;
The first bearing bed determining unit is used for determining bearing bed PW according to the vpn label of each packet that receives;
First converges encapsulation unit, is used for described a plurality of packets are converged, and the packet after converging is encapsulated again the vpn label of described bearing bed PW;
First delivery unit is used for the packet that converges after the encapsulation is sent out by described bearing bed PW.
11. system as claimed in claim 8 is characterized in that, described level is set up the unit and is specifically comprised:
Second bearing bed is set up the unit, is used for setting up bearing bed PW by signaling protocol or expanded signalling agreement between two first equipment;
Second operation layer is set up the unit, is used to connect two described first equipment, sets up operation layer PW respectively by signaling protocol or expanded signalling agreement between two second connected first equipment of equipment;
The label distribution unit, be used on described two first equipment, distributing respectively a multiprotocol label switching MPLS label and the operation layer PW that sets up with end corresponding, and by signaling protocol or expanded signalling agreement to the described corresponding relation of opposite end first devices advertise.
12. system as claimed in claim 11 is characterized in that, described transfer equipment specifically comprises:
Second receiving element is used to receive a plurality of packets of many operation layer PW that described transmitting apparatus sends;
The second bearing bed determining unit is used for determining bearing bed PW according to the vpn label of each packet that receives;
The label lookup unit is used for according to the innermost layer label lookup of each packet MPLS label of operation layer PW correspondence separately;
Second converges encapsulation unit, is used for described a plurality of packets are converged, and encapsulates vpn label and the described MPLS label of described bearing bed PW again for the packet after converging;
Second delivery unit is used for the packet that converges after the encapsulation is sent out by described bearing bed PW.
13., it is characterized in that described level is set up the unit and also comprised as claim 9 or 11 described systems:
Spare level is set up the unit, is used to set up standby operation layer PW; And/or, set up standby bearing bed PW.
14. system as claimed in claim 13 is characterized in that, described system also comprises:
Switch unit is used in described bearing bed PW fault and when having standby bearing bed PW, the data of all operation layer PW that will be related with described bearing bed PW switch on the described standby bearing bed PW and transmit; Perhaps, in described bearing bed PW fault and when not having standby bearing bed PW, the data of all operation layer PW that will be related with described bearing bed PW switch to respectively on the corresponding described standby operation layer PW and transmit.
15. a transfer equipment of realizing the stratification virtual link is characterized in that, comprising:
Receiving element is used to receive a plurality of packets on many operation layer PW;
The bearing bed determining unit is used for determining bearing bed PW according to the vpn label of each packet that receives;
Converge encapsulation unit, be used for described a plurality of packets are converged, and the packet after converging encapsulated again the vpn label of described bearing bed PW;
Delivery unit is used for the packet that converges after the encapsulation is sent out by described bearing bed PW;
Wherein, described bearing bed PW and described operation layer PW are the virtual link PW of two or more levels of foundation, and the PW on upper strata is operation layer PW, and the PW of lower floor is bearing bed PW.
16. transfer equipment as claimed in claim 15 is characterized in that, also comprises:
The label lookup unit is used for according to the innermost layer label lookup of each packet multiprotocol label switching MPLS label of operation layer PW correspondence separately;
The described encapsulation unit that converges is further used for encapsulating described MPLS label again for the packet after converging;
Wherein, described MPLS label for distribute with the corresponding label of setting up with end of operation layer PW, and announce described corresponding relation to the opposite end of described bearing bed PW transfer equipment by signaling protocol or expanded signalling agreement.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910119774A CN101848199A (en) | 2009-03-26 | 2009-03-26 | Method for implementing layering virtual link, system and transmission equipment thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910119774A CN101848199A (en) | 2009-03-26 | 2009-03-26 | Method for implementing layering virtual link, system and transmission equipment thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101848199A true CN101848199A (en) | 2010-09-29 |
Family
ID=42772663
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200910119774A Pending CN101848199A (en) | 2009-03-26 | 2009-03-26 | Method for implementing layering virtual link, system and transmission equipment thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101848199A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102820990A (en) * | 2012-02-29 | 2012-12-12 | 中兴通讯股份有限公司 | Method and device for switching service protection |
| CN104980362A (en) * | 2014-04-04 | 2015-10-14 | 华为技术有限公司 | Business tunnel establishment method and business tunnel establishment device |
| WO2017161938A1 (en) * | 2016-03-22 | 2017-09-28 | 华为技术有限公司 | Packet transmission method and device |
-
2009
- 2009-03-26 CN CN200910119774A patent/CN101848199A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102820990A (en) * | 2012-02-29 | 2012-12-12 | 中兴通讯股份有限公司 | Method and device for switching service protection |
| CN102820990B (en) * | 2012-02-29 | 2015-05-13 | 中兴通讯股份有限公司 | Method and device for switching service protection |
| CN104980362A (en) * | 2014-04-04 | 2015-10-14 | 华为技术有限公司 | Business tunnel establishment method and business tunnel establishment device |
| 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 |
| WO2017161938A1 (en) * | 2016-03-22 | 2017-09-28 | 华为技术有限公司 | Packet transmission method and device |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US8854975B2 (en) | Scaling OAM for point-to-point trunking | |
| CN100450039C (en) | Fast convergence method and device of the end-to-end service | |
| CN102571426B (en) | Double-homing protection method and device | |
| US8711863B2 (en) | Virtual links in a routed ethernet mesh network | |
| CN101938377B (en) | link aggregation error protection method, equipment and system | |
| EP2533475B1 (en) | Method and system for host route reachability in packet transport network access ring | |
| CN101286922B (en) | Signalling control method, system and apparatus | |
| CN100461741C (en) | A method and communication equipment for protecting the Ethernet link collective logic port message against loss | |
| CN101877677B (en) | Tunnel switching method and system for multi-protocol label switching services | |
| CN101710877A (en) | Method, device and system for processing traffic flow based on pseudowire | |
| CN101014035A (en) | Reliability processing method and system of multi-service networking provided by metro Ethernet | |
| CN102611618B (en) | Route protection converting method and device | |
| CN102244609B (en) | Solve VPLS and access method and the router that L3 failover causes stopping | |
| CN101841408A (en) | Primary/standby route equipment switching method and route equipment | |
| CN101820395A (en) | Routing information configuration and private network label addition method and device based on MPLS (Multiple Protocol Label Switching) | |
| CN101465859A (en) | Method and device for triggering main and standby interface board inverse switch | |
| CN102510354A (en) | Dual-home-supported ring network method and system based on virtual private local area network (LAN) service (VPLS) and G8032 | |
| CN102611610A (en) | Method and system for centralized management of a plurality of tunnels with same path | |
| CN101789903B (en) | Method, device and system for protecting semi-ring network | |
| CN108023800A (en) | A kind of guard method of LTE bearer networks and device | |
| US10164823B2 (en) | Protection method and system for multi-domain network, and node | |
| CN101702664B (en) | Data transmission method, device and system of virtual local area network | |
| CN101848199A (en) | Method for implementing layering virtual link, system and transmission equipment thereof | |
| CN111726253B (en) | Cloud computing core network system | |
| US20190268235A1 (en) | Method for managing network nodes and communication control method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20100929 |