CN101237403B - service multiplexing method for Ethernet - Google Patents
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- CN101237403B CN101237403B CN2008100073223A CN200810007322A CN101237403B CN 101237403 B CN101237403 B CN 101237403B CN 2008100073223 A CN2008100073223 A CN 2008100073223A CN 200810007322 A CN200810007322 A CN 200810007322A CN 101237403 B CN101237403 B CN 101237403B
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Abstract
The present invention discloses a method for service multiplexing of Ethernet, comprising the following steps that: after a data frame accesses the Ethernet through a user network interface of a source site, the client identifier of the data frame is determined according to the characteristic information of the data frame; the guest site of the data frame is determined according to the determined client identifier, or according to the destination address in the client identifier and data frame, the data frames with the same guest site and the same client identifier are encapsulated in a path, and a path identifier is added on the path; the paths with the same guest site are bound in one channel, the data frames in the channel are sent after the channel layer encapsulation of the paths in the channel is carried out; the encapsulation of the channel layer is released after the data frames in the channel are received, and the output port of the data frames is determined and the encapsulation of the paths is released according to the path identifier or according to the path identifier and the destination address; an output port of the data frame is determined; after the encapsulations of the channel layer and the paths are released, the obtained data frame is outputted to the determined output port.
Description
Technical field
The present invention relates to the communications field, and especially, relate to a kind of service multiplexing method that is used for Ethernet.
Background technology
Under the IPization trend of telecommunication service promotes, the transmission network loaded service is from serving as main to serving as main the transformation with time division multiple access (TDM) with IP, the corresponding business interface is also from serving as main to change to the Packet Service interface with traditional SDH (Synchronous Digital Hierarchy) (SDH), PDH (Pseudo-synchronous Digital Hierarchy) (PDH) interface, and Ethernet has become a kind of commonplace service access mode, progressively becomes the business that transmits main flow in the net.
Yet efficient high-quality transmission Ethernet service how in transmitting net can either reach the purpose of bandwidth sharing, can guarantee that again (Quality of Service QoS), just becomes a key issue that transmits the required solution of net to professional service quality.
Traditional SDH network using multiservice transport platform (MSTP) technology carrying Ethernet service, equipment is to transmit transparent transmission service, under the transparent transmission mode, can carry out the transparent transmission of point-to-point to user's ethernet data frame, different user independently uses the network bandwidth, therefore have strict bandwidth safeguard and user isolation, and do not need to adopt other QoS mechanism and security mechanism.Yet such application does not possess the characteristic of bandwidth sharing, and for example, under the bigger situation of access bandwidth, the bandwidth that transmits network can't support with inserting the access bandwidth that the quantity line style increases.
Though the MSTP later stage has also been introduced two layers of exchange of Ethernet, so that realize sharing of bandwidth, but because it is just realized by the mode of two layers of exchange of common Ethernet, therefore, lack the effective QoS guarantee, and the bandwidth between the business is competed mutually, lack effective fair sharing policy and bandwidth control strategy, in addition, in order to guarantee the isolation between different business, (it is convenient inadequately to use for Virtual Local Area Network, planning VLAN) and configuration need to carry out VLAN.
So far, propose to realize fair the sharing of bandwidth between different business as yet, can guarantee that again mutual isolation between business is to ensure the Ethernet service multiplexing scheme of the QoS that each is professional.
Summary of the invention
Consider the problems referred to above and make the present invention, for this reason, main purpose of the present invention is to provide a kind of service integration scheme that is used for Ethernet, to solve the mutual isolation that can not take into account in the correlation technique between business and the problem of each professional QoS.
According to embodiments of the invention, a kind of service multiplexing method that is used for Ethernet is provided, be applied to exist the scene of Source Site and residential site.
This method comprises: step S102, at Frame by behind the User Network Interface access network based on ethernet of Source Site, according to the customer ID of the characteristic information specified data frame of Frame; Step S104 is according to the customer ID of determining or according to the residential site of the destination address specified data frame in customer ID and the Frame, the Frame residential site is identical and that customer ID is identical is encapsulated as a path and path is added the path sign; Step S106, the path that the residential site is identical is bundled in the passage, and the Frame in the path in the passage being carried out channel layer encapsulation back sendaisle; Step S108, behind the Frame in receiving passage, the encapsulation of releasing channel layer, according to path sign or according to the output port of path sign and destination address specified data frame, and the encapsulation of removing path, export definite output port to removing the Frame that obtains after the encapsulation of channel layer encapsulation and path.
Wherein, before the encapsulation of carrying out path, this method can further comprise: the client's Business Stream under the specified data frame; Client's Business Stream of determining is carried out flow control.
In addition, in step S104, can further comprise: the Frame in each path is carried out flow control according to the path sign that is provided with.
Wherein, in step S104, can carry out flow control to client's Business Stream or path in the mode of token bucket.
Particularly, the processing of carrying out flow control comprises: protection bandwidth and non-assured bandwidth that token bucket is set; Wherein, the Frame for surpassing in the flow of M+N directly abandons; For surpassing M and, allowing to transmit, and under the situation that appearance is blocked, preferentially abandon above the Frame in the flow of M+N; For the Frame in the flow that is no more than M, guarantee its forwarding; Wherein, M is for guaranteeing bandwidth, and N is a non-assured bandwidth.
On the other hand, in step S104, can carry out flow control as the mode of protection bandwidth to Business Stream with flow with User Network Interface.
And, in step S106, can further comprise:
In passage, comprise under the situation of a plurality of paths, guaranteeing that Frame is no more than under the prerequisite of assurance bandwidth of each path in a plurality of paths, shares the bandwidth of a plurality of paths.
In addition, the operation according to the residential site of the destination address specified data frame in customer ID and the Frame is specifically as follows: the corresponding relation of static named place of destination location and residential site; Perhaps obtain the corresponding relation of destination address and residential site by the study in two layers of exchange of Ethernet.
In addition, the processing of the encapsulation of releasing path is specifically as follows: remove the encapsulation of path by the sign of removing path.
In addition, determine that according to path sign and destination address the processing of output port is specially: the information of static named place of destination location and output port, and determine output port thus; Perhaps obtain the information of destination address and output port, and determine output port thus by the study in two layers of exchange of Ethernet.
In addition, passage comprises logical channel and physical channel, wherein, is under the situation of logical channel at passage, and further comprise when carrying out the channel layer encapsulation: each passage to encapsulation is provided with gap marker.
In addition, above-mentioned path sign comprise following any: professional VLAN ID, pseudo-line sign.
Above-mentioned characteristic information comprises: the sign of user network port, the VLAN ID in the Frame, the 802.1p priority in the Frame, differential service tag field priority and the combination thereof in the Frame.
By technique scheme of the present invention, can finish the effectively multiplexing of Ethernet service, can realize professional isolation based on the client, can effectively share the link between Source Site and residential site again, guarantee professional QoS; In addition, can also make the forwarding of Frame more convenient and flexible.
Description of drawings
Accompanying drawing described herein is used to provide further understanding of the present invention, constitutes the application's a part, and illustrative examples of the present invention and explanation thereof are used to explain the present invention, do not constitute improper qualification of the present invention.In the accompanying drawings:
Fig. 1 is the flow chart according to the service multiplexing method that is used for Ethernet of the embodiment of the invention;
Fig. 2 is the service integration schematic diagram according to the Ethernet of the embodiment of the invention; And
Fig. 3 is the schematic diagram according to the processing example of the service multiplexing method that is used for Ethernet of the embodiment of the invention.
Embodiment
Describe embodiments of the invention in detail below in conjunction with accompanying drawing.
In the present embodiment, provide a kind of service multiplexing method that is used for Ethernet, be applied to exist the scene of Source Site and residential site.
As shown in Figure 1, the service multiplexing method that is used for Ethernet according to the present invention comprises: step S102, at Frame by behind the User Network Interface access network based on ethernet of Source Site, according to the customer ID of the characteristic information specified data frame of Frame; Step S104, according to the customer ID of determining or (promptly according to the destination address in customer ID and the Frame, target MAC (Media Access Control) address) residential site of specified data frame, the Frame residential site is identical and that customer ID is identical are encapsulated as a path and path are added the path sign; Step S106, the path that the residential site is identical is bundled in the passage, and the Frame in the path in the passage being carried out channel layer encapsulation back sendaisle; Step S108, behind the Frame in receiving passage, the encapsulation of releasing channel layer, according to path sign or according to the output port of path sign and destination address specified data frame, and the encapsulation of removing path, export definite output port to removing the Frame that obtains after the encapsulation of channel layer encapsulation and path.
Wherein, before the encapsulation of carrying out path, this method can further comprise: the client's Business Stream under the specified data frame; Client's Business Stream of determining is carried out flow control.
In addition, in step S104, can further comprise: the Frame in each path is carried out flow control according to the path sign that is provided with.
Wherein, in step S104, can carry out flow control to client's Business Stream or path in the mode of token bucket.
Particularly, the processing of carrying out flow control comprises: protection bandwidth and non-assured bandwidth that token bucket is set; Wherein, the Frame for surpassing in the flow of M+N directly abandons; For surpassing M and, allowing to transmit, and under the situation that appearance is blocked, preferentially abandon above the Frame in the flow of M+N; For the Frame in the flow that is no more than M, guarantee its forwarding; Wherein, M is for guaranteeing bandwidth, and N is a non-assured bandwidth.
On the other hand, in step S104, can carry out flow control as the mode of protection bandwidth to Business Stream with flow with User Network Interface.In this case, be generally the transparent transmission of port speed constraint.
And, in step S106, can further comprise:
In passage, comprise under the situation of a plurality of paths, guaranteeing that Frame is no more than under the prerequisite of assurance bandwidth of each path in a plurality of paths, shares the bandwidth of a plurality of paths.
In addition, the operation according to the residential site of the destination address specified data frame in customer ID and the Frame is specifically as follows: the corresponding relation of static named place of destination location and residential site; Perhaps obtain the corresponding relation of destination address and residential site by the study in two layers of exchange of Ethernet.
In addition, the processing of the encapsulation of releasing path is specifically as follows: remove the encapsulation of path by the sign of removing path.
In addition, determine that according to path sign and destination address the processing of output port is specially: the information of static named place of destination location and output port, and determine output port thus; Perhaps obtain the information of destination address and output port, and determine output port thus by the study in two layers of exchange of Ethernet.
In addition, passage comprises logical channel and physical channel, wherein, is under the situation of logical channel at passage, and further comprise when carrying out the channel layer encapsulation: each passage to encapsulation is provided with gap marker.
In addition, above-mentioned path sign comprise following any: professional VLAN ID, pseudo-line sign.Usually, path can pass through service provider VLAN (Service VirtualLocal Area Network, S-VLAN), pseudo-line (Pseudo Wire, PW) etc. distinguish, when these modes of employing are distinguished by multiple mode.
Above-mentioned characteristic information comprises: the sign of user network port, the VLAN ID in the Frame, the 802.1p priority in the Frame, differential service tag field priority and the combination thereof in the Frame.And client's Business Stream can adopt identical characteristic information to produce with customer ID, also can adopt different characteristic informations to produce.
In said method, it should be noted that, customer ID only is used to discern different clients, different clients distinguish by network management configuration, customer ID only for the internal control sign, does not externally embody, and the Frame of same client uses same rate limit, shared same bandwidth is isolated mutually between the different clients; The Frame that does not have corresponding client's configuration will be dropped.
Fig. 2 adopts the process schematic diagram that carries out service integration according to the method for the embodiment of the invention.
As can be seen from the figure, in the Source Site, need carry out characteristic information identification, rate limit, path selection (encapsulation), passage binding (encapsulation) for Frame; Afterwards, by passage Frame is sent to the residential site; In the residential site, for Frame need carry out that channel information is peeled off, output port is selected and path information is peeled off.
In actual applications, this method can be used for providing the multiple business model, will be described in detail below.
Business Processing process in the Source Site side is as follows:
The first step, ethernet data frame are determined customer ID and client's Business Stream based on the Frame characteristic information after inserting by each UNI of Source Site (User to NetworkInterface, User Network Interface) port, the corresponding client of each customer ID;
Second step, the optional use token bucket of each client's Business Stream carries out flow control, each token bucket is finished rate-limiting feature, dispose excess information rate (Excess InformationRate, EIR) and guarantee information speed (Committed Information Rate, CIR) rate limit, CIR is for guaranteeing bandwidth, EIR is a non-assured bandwidth; When non-selected flow control, directly entered for the 3rd step;
In the 3rd step, each Frame determines the residential site according to target MAC (Media Access Control) address in customer ID or customer ID and the frame (that is, above-mentioned destination address);
In the 4th step, the Frame that identical residential site and customer ID are identical enters same path (Channel) and encapsulates, and adds the path sign;
The 5th step, go to one or more paths of same residential site to be bundled at least one passage, carry out channel layer encapsulation, (Network to Network Interface, NNI) port mails to the residential site by the network interface again after need adding gap marker for logical channel.
Alternatively, the rate limit in above-mentioned second step is handled and can be selected (the 4th step) to carry out afterwards at path, and will select token bucket this moment based on the path sign that the 4th step was determined, and not use client's Business Stream to select token bucket.
In above-mentioned the 3rd step, during the application target MAC Address, can specify the corresponding relation of target MAC (Media Access Control) address and residential site to obtain residential site information by static state, also can search and obtain the corresponding residential site of target MAC (Media Access Control) address information automatically by the study in two layers of exchange of common Ethernet.
In above-mentioned the 5th step, passage is the Frame forward-path between Source Site and the residential site, show as logical links or physical link, physical link can be the Ethernet physical link, SDH VCG (virtual cascade group) physical link, OTH ODUk etc., logical links can be MPLS (Multi-Protocol Label Switching, multiprotocol label switching) LSP (Label Switched Path, label switched path), PBT (Provider BackboneTransport) tunnel etc., physical link does not need extra gap marker, and its physical port number has promptly been represented gap marker; When adopting above logical links mode that passage is provided, gap marker is the LSP of MPLS or PBT Tunnel Identifier etc.
In addition, in above-mentioned the 5th step, a passage can bundle a path according to network management configuration, also can bundle a plurality of paths simultaneously, when binding a plurality of path, bandwidth between a plurality of paths can be shared under the prerequisite of CIR separately guaranteeing, at the actual flow occupied bandwidth during less than CIR, bandwidth partly or entirely (when no flow) discharges the EIR bandwidth of giving other path and uses.
On the other hand, the Business Processing process in the residential site side is as follows:
The first step, residential site receive by the NNI port channel and reach this website message, and decapsulation is also peeled off channel information;
In second step, each Frame is according to path sign or path sign+target MAC (Media Access Control) address decision output port;
The 3rd step, peel off the path sign, output to uni port.
Particularly, during the application target MAC Address, can specify the corresponding relation of target MAC (Media Access Control) address and output port to obtain output port information by static state, also can search and obtain the corresponding output port information of target MAC (Media Access Control) address automatically by the study in two layers of exchange of common Ethernet.
Below in conjunction with instantiation the present invention is described.
Fig. 3 shows concrete application scenarios of the present invention.As shown in Figure 3, this scene comprises 3 MPLS websites, the UNI 1 of Source Site and UNI 2 need be delivered to the UNI 5 and the UNI 6 of residential site 1 in the mode of shared bandwidth, realize so-called EVPL business, 4 of UNI 3 and UNI need realize so-called EPL business by the transparent UNI 7 of residential site 1 and the UNI 8 of residential site 2 of being delivered to of port speed constraint.
Particularly, under this scene, the processing procedure of Source Site side is as follows:
The first step because that this example is transmitted based on uni port is professional, does not have thinner Business Stream processing requirements, so the Source Site number identifies client and client's Business Stream simultaneously based on uni port, has identified 4 clients and 4 client's Business Streams among Fig. 3;
Second step was provided with its CIR and EIR bandwidth respectively to UNI 1 and UNI 2 client's Business Streams, carried out the bandwidth speed limit, did not then need to dispose CIR and EIR bandwidth for UNI 3 and UNI 4 client's Business Streams, directly transmitted according to UNI 3 and UNI 4 port speeds;
In the 3rd step, the Source Site is selected according to customer ID decision residential site, because customer ID and uni port are number corresponding herein, so UNI 1, UNI 2 and UNI 3 customer selecting residential sites 1, UNI 4 customer selecting residential sites 2;
In the 4th step, the frame that enters from UNI 1 adds the path sign, is PW 1 herein, and corresponding UNI 2, UNI 3 and UNI 4 these 3 clients in addition add PW2, PW 3, PW 4 paths sign respectively;
In the 5th step, network management configuration PW 1 and PW 2 are bundled into the Source Site in the LSP 1 of residential site 1, and PW 3 is tied among the LSP 2, and PW 4 is tied among the LSP 3, send to two residential sites after interpolation LSP1, LSP 2, LSP 3 signs.
The processing procedure of residential site side is as follows:
After the first step, residential site 1 receive the message of LSP 1 and LSP 2, peel off LSP1 and LSP 2 labels; After residential site 2 receives the message of LSP 3, peel off LSP 3 labels;
In second step, residential site 1 is selected UNI5, UNI 6, UNI 7 output ports respectively according to PW 1, PW 2, PW 3 signs; UNI 8 output ports are selected according to PW 4 signs in residential site 2;
In the 3rd step, residential site 1 and 2 is peeled off the PW sign respectively, and the ethernet frame that recovers to come out is outputed to selected uni port.
In sum, the present invention can realize the multiplexing of Ethernet service by path and passage, and business such as EPL, EVPL are provided.By means of technical scheme of the present invention, can finish the effectively multiplexing of Ethernet service, can realize professional isolation based on the client, can effectively share the link between Source Site and residential site again, guarantee professional QoS; In addition, the pass-through mode of Frame is also very flexible, both can human configuration also can find residential site and output port automatically.
The above is the preferred embodiments of the present invention only, is not limited to the present invention, and for a person skilled in the art, the present invention can have various changes and variation.Within the spirit and principles in the present invention all, any modification of being done, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (17)
1. service multiplexing method that is used for Ethernet is applied to exist the scene of Source Site and residential site, it is characterized in that described method comprises:
Step S102 by behind the User Network Interface access network based on ethernet of described Source Site, determines the customer ID of described Frame at Frame according to the characteristic information of described Frame;
Step S104, determine the residential site of described Frame according to the described customer ID of determining or according to the destination address in described customer ID and the described Frame, the Frame residential site is identical and that customer ID is identical is encapsulated as a path and described path is added the path sign;
Step S106, the path that the residential site is identical is bundled in the passage, and the Frame in the path in the described passage being carried out the described passage of channel layer encapsulation back transmission;
Step S108, behind the Frame in receiving described passage, remove described channel layer encapsulation, according to described path sign or determine the output port of described Frame according to described path sign and described destination address, and the encapsulation of removing path, export definite described output port to removing the Frame that obtains after the encapsulation of described channel layer encapsulation and described path.
2. method according to claim 1 is characterized in that, before the encapsulation of carrying out described path, further comprises:
Determine client's Business Stream that described Frame is affiliated;
Described client's Business Stream of determining is carried out flow control.
3. method according to claim 1 is characterized in that, in described step S104, further comprises:
According to the described path sign that is provided with the Frame in described each path is carried out flow control.
4. method according to claim 2 is characterized in that, in described step S104, in the mode of token bucket described client's Business Stream or described path is carried out flow control.
5. method according to claim 3 is characterized in that, in described step S104, in the mode of token bucket described path is carried out flow control.
6. according to claim 4 or 5 described methods, it is characterized in that the described processing of carrying out flow control comprises:
The protection bandwidth and the non-assured bandwidth of token bucket are set;
Wherein, the Frame for surpassing in the flow of M+N directly abandons;
For surpassing M and, allowing to transmit, and under the situation that appearance is blocked, preferentially abandon above the Frame in the flow of M+N; For the Frame in the flow that is no more than M, guarantee its forwarding; Wherein, M is described assurance bandwidth, and N is described non-assured bandwidth.
7. method according to claim 2 is characterized in that, in described step S104, as the mode of protection bandwidth described Business Stream is carried out flow control with the flow with described User Network Interface.
8. method according to claim 6 is characterized in that, in described step S106, further comprises:
In described passage, comprise under the situation of a plurality of paths, guaranteeing that Frame is no more than under the prerequisite of assurance bandwidth of each path in described a plurality of path, shares the bandwidth of described a plurality of paths.
9. method according to claim 7 is characterized in that, in described step S 106, further comprises:
In described passage, comprise under the situation of a plurality of paths, guaranteeing that Frame is no more than under the prerequisite of assurance bandwidth of each path in described a plurality of path, shares the bandwidth of described a plurality of paths.
10. method according to claim 1 is characterized in that, describedly determines that according to the destination address in described customer ID and the described Frame operation of the residential site of described Frame is specially:
Static corresponding relation of specifying described destination address and described residential site; Perhaps obtain the corresponding relation of described destination address and described residential site by the study in two layers of exchange of Ethernet.
11. method according to claim 1 is characterized in that, the processing of removing the encapsulation of path is specially: remove the encapsulation of described path by the sign of removing described path.
12. method according to claim 1, it is characterized in that, describedly determine that according to described path sign and described destination address the processing of described output port is specially: the information of static described destination address of appointment and described output port, and definite thus described output port; Perhaps
Obtain the information of described destination address and described outbound port by the study in two layers of exchange of Ethernet, and determine described output port thus.
13. method according to claim 1 is characterized in that, described passage comprises logical channel and physical channel, wherein, is under the situation of described logical channel at described passage, further comprises when carrying out the encapsulation of described channel layer:
Each passage to encapsulation is provided with gap marker.
14. according to each described method among claim 1-5, the 7-11, it is characterized in that, described path sign comprise following any: professional VLAN ID, pseudo-line sign.
15. method according to claim 6 is characterized in that, described path sign comprise following any: professional VLAN ID, pseudo-line sign.
16. according to each described method among claim 1-5, the 7-11, it is characterized in that described characteristic information comprises: the VLAN ID in the sign of described user network port, the described Frame, the 802.1p priority in the described Frame, differential service tag field priority and the combination thereof in the described Frame.
17. method according to claim 6, it is characterized in that described characteristic information comprises: the VLAN ID in the sign of described user network port, the described Frame, the 802.1p priority in the described Frame, differential service tag field priority and the combination thereof in the described Frame.
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| CN101753592B (en) * | 2008-11-28 | 2013-04-17 | 国际商业机器公司 | Method and system for data processing |
| CN101771488B (en) * | 2009-01-05 | 2014-06-04 | 华为技术有限公司 | Method, system and equipment for improving reliability of multi-service transport network |
| CN102045130B (en) * | 2009-10-20 | 2013-06-05 | 华为技术有限公司 | Downlink framing method, optical line terminal and passive optical network system |
| CN102158422B (en) * | 2011-05-27 | 2014-07-23 | 杭州华三通信技术有限公司 | Message forwarding method and equipment for layer 2 ring network |
| CN102638387B (en) * | 2012-04-28 | 2015-05-13 | 杭州华三通信技术有限公司 | Method and device for solving oscillation problem of multi-virtual registration protocol (MVRP) loop of local area network |
| CN109698732B (en) | 2017-10-23 | 2021-07-09 | 华为技术有限公司 | Method and device for transmitting data |
| CN114598745B (en) * | 2020-12-04 | 2023-12-08 | 华为技术有限公司 | Communication method and device |
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| CN1652542A (en) * | 2004-02-07 | 2005-08-10 | 华为技术有限公司 | Method for implement virtual leased line |
| CN1691666A (en) * | 2004-04-21 | 2005-11-02 | 华为技术有限公司 | Method of multi-protocol universal line transmission and device therefor |
| CN1791056A (en) * | 2004-12-19 | 2006-06-21 | 华为技术有限公司 | Network transmission method for multi-protocol label exchange VPN |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1652542A (en) * | 2004-02-07 | 2005-08-10 | 华为技术有限公司 | Method for implement virtual leased line |
| CN1691666A (en) * | 2004-04-21 | 2005-11-02 | 华为技术有限公司 | Method of multi-protocol universal line transmission and device therefor |
| CN1791056A (en) * | 2004-12-19 | 2006-06-21 | 华为技术有限公司 | Network transmission method for multi-protocol label exchange VPN |
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