CN102497304A - QinQ (Stacked Virtual Local Area Networks) technology based method for bearing multiple Ethernet virtual connections (EVCs) - Google Patents
QinQ (Stacked Virtual Local Area Networks) technology based method for bearing multiple Ethernet virtual connections (EVCs) Download PDFInfo
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- CN102497304A CN102497304A CN2011104071854A CN201110407185A CN102497304A CN 102497304 A CN102497304 A CN 102497304A CN 2011104071854 A CN2011104071854 A CN 2011104071854A CN 201110407185 A CN201110407185 A CN 201110407185A CN 102497304 A CN102497304 A CN 102497304A
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Abstract
The invention discloses a QinQ (Stacked Virtual Local Area Networks) technology based method for bearing multiple Ethernet virtual connections (EVCs). In EVC transmission, a service virtual local area network (SVLAN) layer is stacked on a customer virtual local area network (CVLAN) which is accessed in from a user network interface (UNI), wherein the SVLAN is used as a bearing layer for bearing the EVC and is isolated from a forward layer of a forward identity (FID), so that the SVLAN can bear multiple EVCs and the customization of the service-based flow control specific to different users is facilitated.
Description
Technical field
The present invention relates to VLAN (Virtual Local Area Network, VLAN) technical field, relate in particular to a plurality of EVC (Ethernet Virtual Connection, Ethernet virtual connections) bearing method based on the QinQ technology.
Background technology
The standard of QinQ (also claiming Stacked VLAN or Double VLAN) technology comes from IEEE802.1ad; Its realization is encapsulated in user private network VLAN Tag among the public network VLAN Tag; Make the message band the public network of two-layer VLAN Tag passing through provider; One deck identifying user grid (customer network) wherein, one deck marked network carrier network (service provider network) is with its extension realization subscriber line identification.
And EVC is the notion that is proposed by MEF (Metro Ethernet Forum, Metro Ethernet Forum), in Ethernet MEF model; It has defined several kinds of EVC business models, shown in Figure 1A-C, is respectively a bit to 1 EVC; A bit to multiple spot EVC, multiple spot is to multiple spot EVC, to connect two or more User Network Interface UNI (User Network Interface); And between them, form the virtual connection of exchange ether traffic frame, and in the EVC model of the MEF that in existing QinQ, realizes, CVLAN (the Customer VLAN that comes in from UNI; The user side VLAN) in EVC in the transmission, one deck SVLAN that on CVLAN, superposeed (Service VLAN, service provider end VLAN); Usually this SVLAN also is used for identifying this EVC simultaneously both as forwarding instance, and such SVLAN just can only carry an EVC.
Like Fig. 2, shown in 3, in the QinQ technology, if a SVLAN carries a plurality of CVLAN, can only use an EVC to identify this moment, can't reach through CVLAN and distinguish user's service, the relation that instance that promptly this moment, the user served and forwarding instance are 1: 1; Simultaneously, the limited amount of EVC is in SVLAN quantity, and maximum can only be supported 4096 EVC.
In traditional Q inQ model, two layers of forwarding information table (FDB) are bound with SVLAN, and SVLAN just can only carry an EVC like this, identifies with SVLAN.When being tied to the same SVLAN for different CVLAN like this; The forwarding behavior depends on this SVLAN; Just can not isolate, reach the effect of a plurality of EVC, for the flow control aspect CVLAN; Because be to depend on SVLAN to transmit, therefore when going into pipeline, can not distinguish and do flow control based on user's service.
Summary of the invention
The purpose of this invention is to provide a kind of new bearing method based on the technological a plurality of Ethernet virtual connections of QinQ; Separate forwarding instance (FID) and customer instance (Service ID); SVLAN is only as the VLAN that carries EVC; Irrelevant with forwarding instance, such SVLAN just can carry a plurality of EVC, also can do flow control based on customer instance simultaneously.
For realizing above-mentioned purpose; The present invention proposes following technical scheme: a kind of bearing method based on the technological a plurality of Ethernet virtual connections of QinQ; In the transmission of Ethernet virtual connections (EVC); The user side VLAN (CVLAN) of coming in from User Network Interface (UNI) is superimposed with service provider's end VLAN (SVLAN) layer, and wherein, service provider's end VLAN is as the bearing bed that carries the Ethernet virtual connections; Isolated with the forwarding layer of forwarding instance (FID), make service provider's end VLAN can carry a plurality of Ethernet virtual connections.
Further, the different different forwarding instance of user side VLAN mapping.
The same service provider of different user side VLAN mapping end VLAN.
Forwarding instance separates with customer instance mutually, and said forwarding layer also carries out the flow control of user side based on customer instance.
Compared with prior art, behind employing the present invention, when the protection switching took place, only as carrying, isolated with the forwarding layer, SVLAN just can carry a plurality of EVC like this with SVLAN, helps the flow control based on service customized for different users.
Description of drawings
Figure 1A-C is several kinds of EVC business model sketch mapes of MEF definition;
Fig. 2 is traditional sketch map based on the technological Ethernet virtual connections of QinQ;
Fig. 3 is the sketch map that traditional Ethernet virtual connections based on the QinQ technology is carried;
Fig. 4 is the sketch map that the present invention is based on the Ethernet virtual connections carrying of QinQ technology;
Fig. 5 the present invention is based on the module diagram of the Ethernet virtual connections carrying of QinQ technology.
Embodiment
To combine accompanying drawing of the present invention below, the technical scheme in the preferred embodiment of the present invention will be carried out clear, complete description.
The bearing method that the present invention proposes based on the technological a plurality of Ethernet virtual connections of QinQ; It is will be in the transmission of Ethernet virtual connections (EVC); The user side VLAN (CVLAN) of coming in from User Network Interface (UNI) is superimposed with service provider's end VLAN (SVLAN) layer, and is as shown in Figure 4, different with prior art; SVLAN among the present invention is only as carrying the EVC bearing bed; With transmit and the forwarding layer of flow control isolated, SVLAN just can carry a plurality of EVC like this, help for different users customized based on the service flow control.
Among the present invention, customer instance (Service ID) separates with forwarding instance (FID) mutually, and the FID notion is similar to VPN (Virtual Private Network; VPN) VSI in the network (Virtual Switch Interface, virtual switch interface) is based on the forwarding instance of user side; Can be mapped to different FID for different CVLAN like this, but can be identical SVLAN, SVLAN be only as bearing bed like this; Peeled off original forwarding behavior; At this moment just can isolate each other, reach the effect of a plurality of EVC, can do flow control based on this FID through different FID; Reach flow control, for telecom operators offer convenience based on the user.
As shown in Figure 5; Comprise different Ethernet virtual connections EVC1 among the User Network Interface UNI, EVC2, EVC3; The user side VLAN that wherein has CVLAN10-20 among the EVC1; The user side VLAN that has CVLAN30-40 among the EVC2 has the user side VLAN of CVLAN40-50 among the EVC3, service provider's end VLAN of these Ethernet virtual connections is SVLAN1.User side VLAN CVLAN1, CVLAN2 ... .CLVAN50 is mapped to SVLAN1; But at different Ethernet virtual connections EVC1, EVC2 is among the EVC3; EVC to different isolates service, and promptly user side VLAN CVLAN10-20 is mapped to and transmits layer FID1 and SVLAN1, and the like; User side VLAN CVLAN30-40 is mapped to and transmits layer FID2 and SVLAN1, and user side VLAN CVLAN40-50 is mapped to and transmits layer FID3 and SVLAN1, thereby realizes different user CVLAN10-20; CVLAN30-40, CVLAN40-50 provide the service of different aspects such as flow.
Technology contents of the present invention and technical characterictic have disclosed as above; Yet those of ordinary skill in the art still maybe be based on teaching of the present invention and announcements and are done all replacement and modifications that does not deviate from spirit of the present invention; Therefore; Protection range of the present invention should be not limited to the content that embodiment discloses, and should comprise various do not deviate from replacement of the present invention and modifications, and is contained by the present patent application claim.
Claims (4)
1. bearing method based on a plurality of Ethernet virtual connections of QinQ technology; It is characterized in that: in the transmission of Ethernet virtual connections (EVC); The user side VLAN (CVLAN) of coming in from User Network Interface (UNI) is superimposed with service provider's VLAN (SVLAN) layer, and wherein, service provider's VLAN is as the bearing bed that carries the Ethernet virtual connections; Isolated with the forwarding layer of forwarding instance (FID), make service provider's VLAN can carry a plurality of Ethernet virtual connections.
2. the bearing method based on the technological a plurality of Ethernet virtual connections of QinQ according to claim 1 is characterized in that: the different different forwarding instances of user side VLAN mapping.
3. the bearing method based on the technological a plurality of Ethernet virtual connections of QinQ according to claim 2 is characterized in that: the different same service provider of user side VLAN mapping VLANs.
4. the bearing method based on the technological a plurality of Ethernet virtual connections of QinQ according to claim 1, it is characterized in that: forwarding instance separates with customer instance mutually, and said forwarding layer also carries out the flow control of user side based on customer instance.
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| CN2011104071854A CN102497304A (en) | 2011-12-09 | 2011-12-09 | QinQ (Stacked Virtual Local Area Networks) technology based method for bearing multiple Ethernet virtual connections (EVCs) |
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Citations (3)
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| CN1770740A (en) * | 2004-10-25 | 2006-05-10 | 西门子公司 | Method for bandwidth profile management at the user network interface in a metro Ethernet network |
| US20080019385A1 (en) * | 2005-12-30 | 2008-01-24 | Huawei Technologies Co., Inc. (Usa) | System and method of mapping between local and global service instance identifiers in provider networks |
| CN102170385A (en) * | 2010-02-27 | 2011-08-31 | 华为技术有限公司 | Method for transmitting Ethernet frame in Ethernet tree business and provider edge device |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1770740A (en) * | 2004-10-25 | 2006-05-10 | 西门子公司 | Method for bandwidth profile management at the user network interface in a metro Ethernet network |
| US20080019385A1 (en) * | 2005-12-30 | 2008-01-24 | Huawei Technologies Co., Inc. (Usa) | System and method of mapping between local and global service instance identifiers in provider networks |
| CN102170385A (en) * | 2010-02-27 | 2011-08-31 | 华为技术有限公司 | Method for transmitting Ethernet frame in Ethernet tree business and provider edge device |
Non-Patent Citations (2)
| Title |
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| LUYUAN FANG等: "The Evolution of Carrier Ethernet Services-Requirements and Deployment Case Studies", 《COMMUNICATIONS MAGAZINE，IEEE》, vol. 46, no. 3, 5 March 2008 (2008-03-05), pages 69 - 76 * |
| MEF: "Traffic Management Specification：Phase I", 《THE METRO ETHERNET FORUM 2004，MEF5》, 31 May 2004 (2004-05-31), pages 1 - 17 * |
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Application publication date: 20120613 |