CN103428067B - A kind of message forwarding method and equipment based on two-layer virtual private network - Google Patents
A kind of message forwarding method and equipment based on two-layer virtual private network Download PDFInfo
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- CN103428067B CN103428067B CN201310352525.7A CN201310352525A CN103428067B CN 103428067 B CN103428067 B CN 103428067B CN 201310352525 A CN201310352525 A CN 201310352525A CN 103428067 B CN103428067 B CN 103428067B
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Abstract
This application discloses a kind of message forwarding method based on two-layer virtual private network, the method includes：Equipment in two-layer virtual private network determines the target MAC (Media Access Control) address of the message for receiving corresponding exit port when being virtual aggregation group, a virtual aggregation group index number is selected in the virtual aggregation group, and the unicast message is forwarded by the corresponding virtual link of equal value of the virtual aggregation group index number for selecting.Based on same inventive concept, the application also proposes a kind of equipment, realizes the function of virtual link of equal value on equipment that can be in two-layer virtual private network.
Description
Technical field
The application is related to communication technical field, more particularly to a kind of based on two-layer virtual private network（L2VPN）Message
Retransmission method and equipment.
Background technology
Layer 2 virtual private network（L2VPN, Layer2Virtual Private Network）Refer to and set up in the public network
Virtual User Network, be the two layer messages such as Ethernet by the user's message that tunnel encapsulation is carried, for a user provide one
Plant two layers of virtual the Internet service.At present, typical two-layer virtual private network includes Virtual Private LAN Service
（VPLS, Virtual Private LAN Service）Network, Ethernet virtualization interconnection（EVI, Virtualization
Interconnection）Network etc..
In VPLS network shown in Fig. 1, two service provider network edges（Provider Edge, PE）Equipment PE1 with
Two pseudo-wires of equal value between PE2（PW, Pseudo Wire）In PW1 and PW2, PW1 is primary pseudo-wire, and PW2 is standby puppet
Line.Forwarding is executed by primary pseudo-wire between PE1 and PE2.Flow between so PE1 and PE2 is at the same time can only be
Carry in a pseudo-wire in two pseudo-wires of equal value, without realizing load balancing using two pseudo-wires of equal value.
Content of the invention
In view of this, the application provides a kind of message forwarding method and equipment based on two-layer virtual private network, can
The function of virtual link of equal value is realized on equipment in two-layer virtual private network.
For solving above-mentioned technical problem, the technical scheme is that and be achieved in that：
A kind of message forwarding method based on two-layer virtual private network, including：
Determine that the corresponding exit port of the purpose MAC address of unicast message for receiving is virtual aggregation group,
A virtual aggregation group index number is selected in the virtual aggregation group；
The unicast message is forwarded by the corresponding virtual link of equal value of the virtual aggregation group index number for selecting.
A kind of equipment, can be applicable in two-layer virtual private network, and the equipment includes：Determining unit, select unit and turn
Bill unit；
The determining unit, for determine the purpose MAC address of unicast message that receives corresponding go out
Port；
The select unit, the target MAC (Media Access Control) address for determining the unicast message for receiving when the determining unit are corresponding
When exit port is virtual aggregation group, a virtual aggregation group index number is selected in the virtual aggregation group；
The retransmission unit, the virtual aggregation group index number for being selected by the select unit are corresponding of equal value virtual
Link forwards the unicast message.
In sum, the application determines the purpose MAC ground of the message for receiving by the equipment in two-layer virtual private network
When the corresponding exit port in location is virtual aggregation group, a virtual aggregation group index number is selected in the virtual aggregation group, passed through
The corresponding virtual link of equal value of the virtual aggregation group index number of selection forwards the unicast message.With it, can be two
The function of virtual link of equal value is realized on equipment in layer virtual private network.
Description of the drawings
Fig. 1 is the structural representation that PE equipment does not support PW of equal value in prior art；
Fig. 2 is the schematic flow sheet that E-Packets in the specific embodiment of the invention；
Fig. 3 is the schematic diagram that PE equipment realizes equivalence PW in the specific embodiment of the invention；
Fig. 4 is the structural representation of the equipment for being applied to above-mentioned technology in the specific embodiment of the invention.
Specific embodiment
For making the objects, technical solutions and advantages of the present invention become more apparent, develop simultaneously embodiment referring to the drawings, right
Scheme of the present invention is described in further detail.
A kind of message forwarding method based on two-layer virtual private network is proposed in the embodiment of the present invention, and two-layer virtual is special
Equipment in network determines the purpose media access control of the message for receiving（MAC）The corresponding exit port in address is virtual aggregation group
When, a virtual aggregation group index number is selected in the virtual aggregation group, corresponding by the virtual aggregation group index number for selecting
Virtual link of equal value forward the unicast message.With it, real on equipment that can be in two-layer virtual private network
The function of existing equivalence virtual link.
Referring to Fig. 2, Fig. 2 is the schematic flow sheet that E-Packets in the specific embodiment of the invention.Concretely comprise the following steps：
Step 201, the equipment in two-layer virtual private network determine that the target MAC (Media Access Control) address of the unicast message for receiving is corresponding
Exit port is virtual aggregation group, selects a virtual aggregation group index number in the virtual aggregation group.
If the equipment receives the unicast message of public network side transmission, need first to decapsulate the unicast message, further according to
Unicast message after decapsulation is processed；If receiving the unicast message of private network side transmission, direct to the unicast message
Processed.In the present embodiment for convenience, unicast message is that public network side joint is received, and the unicast message after decapsulating,
Or the unicast message that private network side sends.
The equipment is in the corresponding Virtual Switch Instance of the unicast message（Virtual Switch Instance, VSI）Inside look into
MAC Address list item is looked for, according to the virtual link for finding the MAC Address list item determination forwarding unicast message.
When implementing, a virtual aggregation group index number how is selected in virtual aggregation group, can be according to local
The load balancing rule of configuration is realized, can be that any can balancedly distributing to each unicast message realizes each virtuality chain of equal value
The method that the chip on road is forwarded.
Polymerization hash algorithm, the ginseng flowed according to belonging to being used for recognizing the unicast message in the unicast message can such as be used
Number.For recognizing that the parameter flowed belonging to the message carries out Hash, it will usually using the five-tuple of message, such as source IP address, purpose
IP address, source port number, destination slogan and protocol number, in concrete application, can at least select two of which element information
Carry out Hash calculation.
The corresponding chip of each virtual aggregation group index number of virtual aggregation group, each described chip reality in step 201
One virtual link of the existing virtual link of equal value.Equipment in the two-layer virtual private network is at least by realizing the void
Intend the chip composition of aggregation group.
Step 202, the equipment forward the report by the corresponding virtual link of equal value of the virtual aggregation group index number of selection
Text.
List in this step by receiving described in the corresponding virtual link forwarding of equal value of the virtual aggregation group index number of selection
Reporting text includes：
According to the virtual aggregation group index number for selecting by the unicast message and the corresponding forwarding of the target MAC (Media Access Control) address
Table item index number is sent to corresponding chip.
Realize virtual link of equal value that the forwarding-table item minute book chip of each described chip of virtual link of equal value realizes and
The forwarding-table item of each chip both corresponds to the forwarding-table item call number.I.e. the equipment is realizing the virtual link of equal value
Forwarding-table item is all configured on N number of chip, and the forwarding-table item call number of the forwarding-table item configured on each chip is identical, each chip
The mark of the virtual link of equal value that the forwarding-table item of upper configuration is realized comprising this chip.
Realize that arbitrary chip of virtual link of equal value receives the unicast message of distribution, and during forwarding-table item call number,
The unicast message is sent according to virtual link of equal value in the corresponding forwarding-table item of the forwarding-table item call number.
If in the MAC Address list item for finding, the corresponding exit port of the target MAC (Media Access Control) address of the unicast message is chip
ID, then distribute to the corresponding chip of the chip id by the unicast message, when chip receives the unicast message, according to local forwarding
List item forwards the unicast message.
Virtual link of equal value in the specific embodiment of the invention can be pseudo-wire of equal value in VPLS network（PW）, EVI nets
In network, Ethernet of equal value virtualizes mutual downlink connection（EVI link）, or in other L 2 virtual private network networks between opposite equip.
Equivalence virtual link.
In a particular embodiment, by taking VPLS as an example, the PE equipment in VPLS is made up of the present invention chip, such as asic chip.
If PE equipment is made up of multiple chips, for certain PW that the PE equipment is supported, there is N number of PW of equal value, and lead to respectively
N number of chip realization of the PE equipment is crossed, i.e., an equivalence PW is realized by a chip.The chip for constituting the PE equipment is at least
N number of.
How concrete example, when the detailed description present invention is implemented, carry out various configurations below.2 are equal to N, chip 1
As a example by two equivalence PW, i.e. PW1 and PW2 are realized respectively with chip 2,
Firstly, it is necessary to the exit port content of configuration link mark.
On PE equipment generate MAC Address list item method have multiple, such as according to receive data message configure MAC Address
List item；MAC Address list item is configured by protocol massages, or MAC Address list item is directly configured local.The present invention is embodied as
It is indifferent to how MAC Address list item generates in example, corresponding exit port is identified to MAC Address list item link simply and is matched somebody with somebody
Put.
Referring to table 1, table 1 is the content that unicast message MAC Address list item includes in the embodiment of the present invention.
| MAC Address | Forwarding-table item call number | Link identification | Exit port |
| - | 1 | 1 | Virtual aggregation group ID1 |
Table 1
In table 1, PW1 and PW2 are associated with same link identification, and the corresponding exit port of the link identification is virtual poly-
Charge-coupled ID, directly can configure the content that corresponding virtual aggregation group includes in the corresponding content of exit port, it is also possible to such as table 1
In configure virtual aggregation group ID in the content of exit port, and the content of virtual aggregation group is separately configured as a table
?.Referring to table 2, table 2 is the content that virtual aggregation group 1 includes in the embodiment of the present invention.
| Virtual aggregation group index number 1 | Virtual aggregation group index number 2 |
| Chip id 1 | Chip id 2 |
Table 2
From table 2, two virtual aggregation group indexes number correspond to different chip ids respectively, and two different chip ids are corresponding
Chip exactly realize the chip of two equivalence PW.
Secondly, the forwarding-table item on each chip of each PW of equal value is realized in configuration.
In the forwarding-table item of each chip of equivalence PW is realized, the content that configures the forwarding-table item be the realization of this chip etc.
The PW ID of valency PW, and realize that the forwarding-table item call number of each chip of equivalence PW is indexed with the corresponding forwarding-table item of link identification
Number identical.
It is 1 by the corresponding forwarding-table item call number of the visible link identification of table 1, the therefore forwarding on chip 1 and chip 2
The content that the forwarding-table item 1 that table item index number is on 1, and chip 1 includes is PW1, and the forwarding-table item 1 on chip 2 includes
Content PW2.
Below in conjunction with the accompanying drawings, describe how PE equipment in the embodiment of the present invention forwards unicast message in detail：
By taking the unicast message that PE equipment receives private network side as an example.Referring to Fig. 3, Fig. 3 is PE equipment realities in the embodiment of the present invention
The schematic diagram of existing equivalence PW.
When PE equipment receives unicast message, the VLAN according to belonging to receiving the unicast message determines VSI, determined
Corresponding MAC Address list item is found in VSI, is searched to forward according to the target MAC (Media Access Control) address of message and be somebody's turn to do in the MAC Address list item
In the link identification of unicast message, such as Fig. 3, it is assumed that the link identification for finding is 1, and the corresponding exit port of the link identification is void
Intend aggregation group ID, corresponding virtual aggregation group list item is found according to virtual aggregation group ID.
The PE equipment carries out load balancing computing, such as hash algorithm, is received in virtual aggregation group list item according to computing
Match somebody with somebody virtual aggregation group index number.
If the virtual aggregation group index number for matching is 1, by the unicast message, and corresponding turn of the link identification
Forwarding list item call number 1 distributes to chip 1, on chip 1 finds corresponding forwarding-table item, root according to forwarding-table item call number 1
The corresponding PW contents of PW1 according to forwarding-table item forward the unicast message.
If the virtual aggregation group index number for matching is 2, by the unicast message, and corresponding turn of the link identification
Forwarding list item call number 1 distributes to chip 2, on chip 2 finds corresponding forwarding-table item, root according to forwarding-table item call number 1
The corresponding PW contents of PW2 according to forwarding-table item forward the unicast message.
Find corresponding forwarding-table item on chip, further according to forwarding-table item in the corresponding PW contents of PW ID forward
The process of the unicast message is no longer described in detail here compared with realization.
Realized from above-mentioned, in the forwarding-table item on two chips, although forwarding-table item call number is identical, but turned
The content of forwarding list item is different, and the flow-rate ratio between the PW of equal value that final two chips are realized is 1:1, so as to reach traffic sharing
Uniform effect, if will support multiple PW of equal value, as long as increase multiple virtual aggregation group indexes number in virtual aggregation group
The ID of corresponding multiple chips, and forwarding-table item is configured on corresponding chip.
Based on same inventive concept in the specific embodiment of the invention, it is also proposed that a kind of equipment, two-layer virtual is can be applicable to
In dedicated network.Referring to Fig. 4, Fig. 4 is the structural representation of the equipment for being applied to above-mentioned technology in the specific embodiment of the invention.Should
Equipment includes：Determining unit 401, select unit 402 and retransmission unit 403.
Determining unit 401, the purpose MAC address for determining the unicast message for receiving is corresponding to be gone out to hold
Mouthful.
Select unit 402, for when determining unit 401 determine the target MAC (Media Access Control) address of unicast message that receives corresponding go out
When port is virtual aggregation group, a virtual aggregation group index number is selected in the virtual aggregation group.
Retransmission unit 403, the corresponding virtuality chain of equal value of the virtual aggregation group index number for being selected by select unit 402
Road forwards the unicast message.
It is preferred that the corresponding chip of each virtual aggregation group index number of the virtual aggregation group, each described chip
Realize a virtual link of equal value.
It is preferred that
Retransmission unit 403, specifically for according to the virtual aggregation group index number for selecting by the unicast message and described
The corresponding forwarding-table item call number of target MAC (Media Access Control) address is sent to corresponding chip；And the chip is triggered according to the forward table
In the corresponding forwarding-table item of entry index number, virtual link of equal value sends the unicast message.
It is preferred that the virtual link of equal value and each chip of the forwarding-table item minute book chip realization of each chip
Forwarding-table item both corresponds to the forwarding-table item call number.
It is preferred that
The virtual link of equal value is that pseudo-wire of equal value, Ethernet of equal value virtualize mutual downlink connection EVI link, or other two
The virtual link of the equivalence in layer VPN network between opposite equip..
The unit of above-described embodiment can be integrated in one, it is also possible to be deployed separately；A unit can be merged into, also may be used
To be further split into multiple subelements.
In sum, the equipment in the specific embodiment of the invention in two-layer virtual private network determines the mesh of the message for receiving
MAC Address corresponding exit port when being virtual aggregation group, select a virtual aggregation group index in the virtual aggregation group
Number, the unicast message is forwarded by the corresponding virtual link of equal value of the virtual aggregation group index number for selecting.With it, energy
The function of virtual link of equal value is realized on enough equipment in two-layer virtual private network.
The present invention is when implementing, although be configured with forwarding-table item on each chip, but a final unicast
Message only can be forwarded from a chip, and therefore, when the forwarding of message is achieved, on each chip, the message of forwarding achieves negative
Carry balanced.
The above, only presently preferred embodiments of the present invention is not intended to limit protection scope of the present invention.All
Within the spirit and principles in the present invention, any modification, equivalent substitution and improvements that is made etc. should be included in the protection of the present invention
Within the scope of.
Claims (8)
1. a kind of message forwarding method based on two-layer virtual private network, it is characterised in that include：
Determine that the corresponding exit port of the purpose MAC address of unicast message for receiving is virtual aggregation group, in institute
One virtual aggregation group index number of selection in virtual aggregation group is stated, each virtual aggregation group index number of the virtual aggregation group is right
A chip is answered, each described chip realizes a virtual link of equal value；
The unicast message is forwarded by the corresponding virtual link of equal value of the virtual aggregation group index number for selecting.
2. method according to claim 1, it is characterised in that described corresponding by the virtual aggregation group index number of selection
The unicast message received described in virtual link forwarding of equal value includes：
According to the virtual aggregation group index number for selecting by the unicast message and the corresponding forwarding-table item of the target MAC (Media Access Control) address
Call number is sent to corresponding chip；
The chip sends the unicast report according to virtual link of equal value in the corresponding forwarding-table item of the forwarding-table item call number
Text.
3. method according to claim 2, it is characterised in that the forwarding-table item minute book chip of each chip is realized
The forwarding-table item of virtual link of equal value and each chip both corresponds to the forwarding-table item call number.
4. the method according to claim 1-3 any one, it is characterised in that
The virtual link of equal value is pseudo-wire of equal value, the mutual downlink connection EVI link of Ethernet virtualization of equal value, or other two layers of void
Intend the virtual link of the equivalence in private network network between opposite equip..
5. a kind of equipment, can be applicable in two-layer virtual private network, it is characterised in that the equipment includes：Determining unit, selection
Unit and retransmission unit；
The determining unit, the corresponding exit port of the purpose MAC address for determining the unicast message for receiving；
The select unit, the target MAC (Media Access Control) address for determining the unicast message for receiving when the determining unit is corresponding to be gone out to hold
When mouth is virtual aggregation group, in the virtual aggregation group, a virtual aggregation group index number is selected, the virtual aggregation group
The corresponding chip of each virtual aggregation group index number, each described chip realize a virtual link of equal value；
The retransmission unit, the corresponding virtual link of equal value of the virtual aggregation group index number for being selected by the select unit
Forward the unicast message.
6. equipment according to claim 5, it is characterised in that
The retransmission unit, specifically for according to the virtual aggregation group index number for selecting by the unicast message and the purpose
The corresponding forwarding-table item call number of MAC Address is sent to corresponding chip；And the chip is triggered according to the forwarding-table item rope
In the corresponding forwarding-table item of quotation marks, virtual link of equal value sends the unicast message.
7. equipment according to claim 6, it is characterised in that the forwarding-table item minute book chip of each chip is realized
The forwarding-table item of virtual link of equal value and each chip both corresponds to the forwarding-table item call number.
8. the equipment according to claim 5-7 any one, it is characterised in that
The virtual link of equal value is pseudo-wire of equal value, the mutual downlink connection EVI link of Ethernet virtualization of equal value, or other two layers of void
Intend the virtual link of the equivalence in private network network between opposite equip..
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| US9531565B2 (en) * | 2013-12-20 | 2016-12-27 | Pismo Labs Technology Limited | Methods and systems for transmitting and receiving packets |
| CN105227490B (en) * | 2014-05-27 | 2018-06-12 | 杭州迪普科技股份有限公司 | A kind of method and device of more device link polymerizations |
| CN104253711B (en) * | 2014-09-25 | 2018-08-24 | 新华三技术有限公司 | The management method and equipment of the Group tables of Openflow in a kind of SDN network |
| CN106850388B (en) * | 2017-02-27 | 2020-04-03 | 迈普通信技术股份有限公司 | Method and device for forwarding message by VPLS network |
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Address after: 310052 Binjiang District Changhe Road, Zhejiang, China, No. 466, No. Patentee after: Xinhua three Technology Co., Ltd. Address before: 310053 Hangzhou hi tech Industrial Development Zone, Zhejiang province science and Technology Industrial Park, No. 310 and No. six road, HUAWEI, Hangzhou production base Patentee before: Huasan Communication Technology Co., Ltd. |