CN101409639B - Method and apparatus for configuring QinQ - Google Patents
Method and apparatus for configuring QinQ Download PDFInfo
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- CN101409639B CN101409639B CN2008101811094A CN200810181109A CN101409639B CN 101409639 B CN101409639 B CN 101409639B CN 2008101811094 A CN2008101811094 A CN 2008101811094A CN 200810181109 A CN200810181109 A CN 200810181109A CN 101409639 B CN101409639 B CN 101409639B
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Abstract
The invention discloses a method for configuring QinQ and a configuration device thereof. The method comprises the following steps: acquiring an inner virtual local area network (VLAN) identification, an outer VLAN identification and a port related to QinQ; establishing a corresponding strategy according to the inner VLAN identification and the outer VLAN identification; applying the established strategy to the port so as to realize QinQ configuration to the port. By the application of the invention, when QinQ configuration is carried out on the port of network equipment by network management equipment, only the port, the inner VLAN and the outer VLAN are proved, so that fussy steps of inputting configuration commands one by one are avoided.
Description
Technical field
The present invention relates to communication technical field, relate in particular to a kind of QinQ collocation method and inking device.
Background technology
QinQ is that its core concept is that user private network VLAN (Virtual Local Network, VLAN) Tag (sign) is encapsulated among the public network VLAN Tag to the address of the visualization of the tunnel protocol that encapsulates based on 802.1Q.The message band the backbone network that two-layer Tag passes through service provider, thereby provides a kind of comparatively simple two-layer VPN (Virtual Private Network, Virtual Private Network) tunnel for the user.By being user's private network message encapsulation outside VLAN Tag on the carrier network edge device, the backbone network that makes message carry two-layer VLAN Tag passing through provider is a public network.In public network, equipment is only transmitted message according to outside VLAN Tag, and with source MAC (the Medium Access Control of message, the medium access control) address list item is learnt in the mac address table of outer VLAN tag place VLAN, and the data division that user's private network VLAN Tag is taken as in transmission course in the message transmits.The QinQ characteristic makes operator to provide service for the user network that contains a plurality of VLAN with a VLAN.
The network equipment of at present a lot of manufacturers can both be supported this characteristic, though the implementation of each vendor equipment is different, configuration to equipment also has nothing in common with each other, but overall thought all is that user private network VLANTag is encapsulated among the public network VLAN Tag, the message band the backbone network that two-layer Tag passes through service provider, thereby provides a kind of comparatively simple two-layer VPN tunnel for the user.
At this, the collocation method of QinQ in a kind of Network Management Equipment in the prior art that makes brief of the introduction.Safeguard four class objects that have on the network equipment on the Network Management Equipment: traffic classification, Flow Behavior, qos policy and port are used.Because it is a plurality of that every class object has,, and increase, the modification of these objects is provided respectively and deletes the interface so webmaster need present these objects respectively in the mode of tabulation.Concrete QinQ configuration step comprises:
(1) definition traffic classification, and in the traffic classification class view, define one group of flow classification rule.
Under system view by order traffic classifier tcl-name[operator{and|or}] definition class and enter the class map view.
Under the class map view, define the rule of match user VLAN (CVLAN) by order if-match customer-vlan-id vlan-id-value.
Finished a class declaration configuration by above two orders.
(2) definition Flow Behavior, and one group of QoS action of definition in the Flow Behavior view.
Under system view, go forward side by side into the Flow Behavior view by Flow Behavior of order traffic behavior behavior-name definition.
Under the Flow Behavior view, dispose the action of adding outside VLAN Tag (SVLAN) by order nest top-most vlan-id vlan-id-value.
Finished a Flow Behavior configuration by above order.
(3) definition strategy is specified corresponding Flow Behavior for the class of using under policy view.
Under system view, define qos policy and enter the qos policy view by order qos policy policy-name.
Under the qos policy view, in strategy, specify the Flow Behavior that adopts for class by order classifier tcl-name behavior behavior-name.
By above order, a qos policy configuration is finished.
(4) use qos policy
When QoS is applied to port, use uplink port and downlink port respectively.By application strategy on downlink port, for the message from assigned vlan (CVLAN) that port is received is added one deck VLAN Tag (SVLAN).By downlink port being configured to the Hybrid type, and configuration when port transmission SVLAN message not with the mode of VLAN Tag, Tag peels off with outside VLAN.
After entering certain trunk or hybrid type port view, enable qinq downlink or uplink function by order qinq enable downlink/uplink, then by order qos apply policy policy-nameinbound with application of policies in port.
By above-mentioned steps, Network Management Equipment has been finished the QinQ configuration to the network equipment.
Use the shortcoming of said method to be that the configuration mode of QinQ mechanically is directed to the configuration order on the network equipment on the Network Management Equipment, configuration order is arranged in the network equipment and so on, Network Management Equipment just provides the corresponding configuration page to support this order.When therefore increasing the QinQ application of a port on the network equipment, except having a graphic interface, with directly as broad as long by the order line configuration on equipment by Network Management Equipment.Cause the QinQ configuration feature interface of Network Management Equipment various, configuration step is loaded down with trivial details and ease for use reduces.
Summary of the invention
The invention provides a kind of QinQ collocation method and inking device, be used to simplify the configuration mode of QinQ on the Network Management Equipment.
The invention provides a kind of QinQ collocation method, comprising:
Obtain QinQ relevant internal layer virtual LAN VLAN sign, outer VLAN identification and port;
Set up corresponding strategy according to described inner VLAN identification and described outer VLAN identification;
The application of policies of described foundation in port, is realized the QinQ configuration to port.
Wherein, describedly set up corresponding strategy according to described inner VLAN identification and described outer VLAN identification and comprise:
According to described inner VLAN identification, create the traffic classification corresponding with described inner VLAN identification;
According to described outer VLAN identification, create the Flow Behavior corresponding with described outer VLAN identification;
Described traffic classification and Flow Behavior are carried out correspondence obtain strategy.
Wherein, described according to described inner VLAN identification, create the traffic classification corresponding and comprise: in the tabulation of preserving traffic classification information, add new traffic classification record and corresponding described inner VLAN identification with described inner VLAN identification;
Described according to described outer VLAN identification, create the Flow Behavior corresponding and comprise: in the tabulation of preserving Flow Behavior information, add new Flow Behavior record and corresponding described outer VLAN identification with described outer VLAN identification;
Describedly described traffic classification and Flow Behavior are carried out correspondence obtain strategy and comprise: in preserving diplomatic tabulation, adds new strategy and write down the corresponding relation that described new traffic classification record and described new Flow Behavior write down.
Wherein, also comprise: the QinQ configuration to port shows.
Wherein, described QinQ configuration to port shows and comprises:
According to the strategy that port is used, obtain the traffic classification and the corresponding Flow Behavior of configuration under the described strategy;
Obtain inner VLAN according to described traffic classification, obtain outside VLAN according to described Flow Behavior;
Described port and corresponding inner VLAN and outside VLAN are shown.
The present invention also provides a kind of QinQ inking device, comprising:
Information acquisition unit is used to obtain QinQ relevant internal layer virtual LAN VLAN sign, outer VLAN identification and port;
Strategy is set up the unit, and the inner VLAN identification and the outer VLAN identification that are used for obtaining according to described information acquisition unit are set up corresponding strategy;
The QinQ configuration to port is realized in port in policy configurations unit, the application of policies that is used for described strategy is set up unit foundation.
Wherein, described strategy is set up the unit and is comprised:
Traffic classification is set up subelement, is used for according to described inner VLAN identification, creates the traffic classification corresponding with described inner VLAN identification;
Flow Behavior is set up subelement, is used for according to described outer VLAN identification, creates the Flow Behavior corresponding with described outer VLAN identification;
Strategy is set up subelement, is used for that described traffic classification and Flow Behavior are carried out correspondence and obtains strategy.
Wherein, described traffic classification is set up subelement, specifically is used in the tabulation of preserving traffic classification information, adds new traffic classification record and corresponding described inner VLAN identification;
Described Flow Behavior is set up subelement, specifically is used in the tabulation of preserving Flow Behavior information, adds new Flow Behavior record and corresponding described outer VLAN identification;
Described strategy is set up subelement, specifically is used for preserving diplomatic tabulation, adds new strategy and writes down the corresponding relation that described new traffic classification record and described new Flow Behavior write down.
Wherein, also comprise:
The configuration display unit is used for the QinQ configuration of port is shown.
Wherein, described configuration display unit comprises:
First obtains subelement, is used for the strategy according to the port application, obtains the traffic classification and the corresponding Flow Behavior of configuration under the described strategy;
Second obtains subelement, is used for obtaining inner VLAN according to described traffic classification, obtains outside VLAN according to described Flow Behavior;
Show subelement, be used for described port and corresponding inner VLAN and outside VLAN are shown.
Compared with prior art, the present invention has the following advantages:
The application of the invention when by Network Management Equipment network equipment port being carried out the QinQ configuration, only need provide port and inner VLAN, outside VLAN to get final product, and has avoided importing one by one the loaded down with trivial details step of configuration order.
Description of drawings
In order to be illustrated more clearly in the technical scheme of the embodiment of the invention, the accompanying drawing of required use is done to introduce simply in will describing embodiment 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.
Fig. 1 is the flow chart of QinQ collocation method among the present invention;
Fig. 2 is another flow chart of QinQ collocation method among the present invention;
Fig. 3 is the configuration of the QinQ on a Network Management Equipment display packing flow chart among the present invention;
Fig. 4 is the structural representation of QinQ inking device among the present invention;
Fig. 5 is another structural representation of QinQ inking device among the present 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 a part of embodiment of the present invention, 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.
The invention provides a kind of QinQ collocation method, be applied on the Network Management Equipment, be used for the QinQ configuration of Network Management Equipment to the network equipment, as shown in Figure 1, this QinQ collocation method comprises:
Step s101, obtain QinQ relevant inner VLAN identification, outer VLAN identification and port.
Step s102, set up corresponding strategy according to inner VLAN identification and outer VLAN identification.
Step s103, with the application of policies set up in port, realize QinQ configuration to port.
In the prior art, for the configuration of QinQ, Network Management Equipment is being safeguarded four class objects on the network equipment, is respectively traffic classification, Flow Behavior, qos policy and port and uses.Because it is a plurality of that every class object has,, and increase, the modification of these objects is provided respectively and deletes the interface so webmaster need present these objects respectively in the mode of tabulation.With a kind of QinQ configuration mode in the prior art is example, and Network Management Equipment carries out the maintenance of following tabulation respectively for above-mentioned four class objects:
For traffic classification, MIB (Management Information Base, management information bank) node ClassifierCfgInfoTable and MatchRuleCfgInfoTable are safeguarding the information of current all traffic classifications that disposed on the network equipment,
For Flow Behavior, MIB Node B ehaviorCfgInfoTable and NestCfgInfoTable are safeguarding current all information of configuration flow behavior of the network equipment
For qos policy, MIB node PolicyCfgInfoTable and PolicyClassCfgInfoTable are safeguarding the current qos policy information that disposed of the network equipment,
Use for port, MIB node QinQIfConfigTable and IfApplyPolicyTable are safeguarding the information of the network equipment when the qos policy of front port application.
Embodiments of the invention provide a kind of QinQ collocation method, needn't be again when being configured by the corresponding configuration order of input so that a traffic classification, one are popular according to increasing, a qos policy and use the step of qos policy to port, and only need select to provide the port of ectonexine VLAN and use to get final product, concrete configuration step is finished automatically by Network Management Equipment.With the example that is configured to of carrying out based on above-mentioned tabulation, the QinQ collocation method among the present invention may further comprise the steps as shown in Figure 2:
Step s201, the inner VLAN of using the user to submit to are created a traffic classification.
Concrete, in node ClassifierCfgInfoTable, add a traffic classification record, comprise information such as traffic classification index, title, sign in this traffic classification record; And be recorded as index with this traffic classification and in node M atchRuleCfgInfoTable, add a record, wherein the value of MatchRuleIntValuel is the inner VLAN of user's submission in the record that adds of node M atchRuleCfgInfoTable.
Step s202, the outside VLAN of using the user to submit to are created a Flow Behavior.
Concrete, in Node B ehaviorCfgInfoTable, add a Flow Behavior record, comprise information such as Flow Behavior index, title, code in this Flow Behavior record; And be recorded as index with this Flow Behavior and in node NestCfgInfoTable, add a record, wherein the value of NestServiceVlanID is the outside VLAN of user's submission in the record that adds of node NestCfgInfoTable.
Step s203, establishment qos policy.
Concrete, set up correspondence for the traffic classification created in the above-mentioned steps and Flow Behavior and obtain qos policy.In node PolicyCfgInfoTable, add a record, and be recorded as index with this and in node PolicyClassCfgInfoTable, add a record, wherein in the record that node PolicyClassCfgInfoTable adds, the value of PolicyClassClassifierIndex is the index of the new traffic classification record that adds among the step s201; The value of PolicyClassBehaviorIndex is the index of the new Flow Behavior record that adds among the step s202.
Step s204, qos policy is applied to the port that the user selects.
Configuration node QinQIfConfigTable and node QoS IfApplyPolicyTable are applied in configured strategy among the step s203 on the port.
By above-mentioned steps, realized QinQ configuration to port.Make the user when the network equipment being carried out the QinQ configuration, only need provide port and inner VLAN, outside VLAN to get final product, avoided importing one by one the loaded down with trivial details step of configuration order by Network Management Equipment.
Among the present invention, when Network Management Equipment when configuration shows to the QinQ of the network equipment, though Network Management Equipment also can read the information such as qos policy, traffic classification and Flow Behavior on the network equipment, but Network Management Equipment can not represent these information to the user on the interface, but only shows port, outside VLAN and the inner VLAN information relevant with the QinQ technology.Concrete, the QinQ configuration display packing among the present invention on the Network Management Equipment comprises as shown in Figure 3:
The strategy that step s301, Network Management Equipment analysis port are used.
Step s302, Network Management Equipment obtain the traffic classification and the corresponding Flow Behavior of configuration under this strategy.
Step s303, Network Management Equipment obtain inner VLAN from traffic classification, obtain outside VLAN from Flow Behavior.
Step s304, Network Management Equipment show the QinQ information of the network equipment.
Concrete, for the QinQ configuring condition on the network equipment, Network Management Equipment passes through after the various information processings, and is as shown in table 1 to the QinQ information demonstration of the network equipment:
The QinQ information of table 1 network equipment
| Device port | Inner VLAN | Outside VLAN |
| GigabitEthernetl/0/1 | 5 | 50 |
| GigabitEthernetl/0/2 | 6 | 60 |
| GigabitEthernet1/0/3 | 7 | 70 |
| GigabitEthernetl/0/4 | 8 | 80 |
By above-mentioned display mode, Network Management Equipment can mask the demonstration that qos policy, traffic classification, Flow Behavior etc. is realized details, makes the QinQ function of Network Management Equipment seem succinctly easy-to-use, and its factor that relates to also has only the correlative factor of QinQ theory.With first line data in the table 1 is example, and from the packet that port GigabitEthernetl/0/1 comes in, if belong to VLAN 5, then equipment is stamped the label of outside VLAN 50 to these bags.Correspondingly, the packet from this port goes out if ectonexine VLAN is respectively 5 and 50, then removes the outer layer label of VLAN 50.
The present invention also provides a kind of QinQ inking device, as shown in Figure 4, comprising:
Strategy is set up unit 20, and the inner VLAN identification and the outer VLAN identification that are used for obtaining according to information acquisition unit 10 are set up corresponding strategy;
The QinQ configuration to port is realized in port in policy configurations unit 30, the application of policies that is used for strategy is set up unit 20 foundation.
Concrete, as shown in Figure 5, in the QinQ inking device of the present invention:
Strategy is set up unit 20 and is specifically comprised:
Traffic classification is set up subelement 21, is used for according to described inner VLAN identification, creates the traffic classification corresponding with described inner VLAN identification; Can specifically be used in the tabulation of preserving traffic classification information, add new traffic classification record and corresponding described inner VLAN identification;
Flow Behavior is set up subelement 22, is used for according to described outer VLAN identification, creates the Flow Behavior corresponding with described outer VLAN identification; Can specifically be used in the tabulation of preserving Flow Behavior information, add new Flow Behavior record and corresponding described outer VLAN identification;
Strategy is set up subelement 23, is used for that traffic classification and Flow Behavior are carried out correspondence and obtains strategy; Can specifically be used for preserving diplomatic tabulation, add new strategy and write down the corresponding relation that described new traffic classification record and described new Flow Behavior write down.
In addition, this QinQ inking device can also comprise:
First obtains subelement 41, is used for the strategy according to the port application, and acquisition strategy is the traffic classification and the corresponding Flow Behavior of configuration down;
Second obtains subelement 42, is used for obtaining inner VLAN according to described traffic classification, obtains outside VLAN according to Flow Behavior;
The application of the invention when by Network Management Equipment network equipment port being carried out the QinQ configuration, only need provide port and inner VLAN, outside VLAN to get final product, and has avoided importing one by one the loaded down with trivial details step of configuration order.In addition, when the QinQ configuration to port shows, Network Management Equipment can mask the demonstration that qos policy, traffic classification, Flow Behavior etc. is realized details, makes the QinQ function of Network Management Equipment seem succinctly easy-to-use, and its factor that relates to also has only the correlative factor of QinQ theory.
Above-mentioned module can be distributed in a device, also can be distributed in multiple arrangement.Above-mentioned module can be merged into a module, also can further split into a plurality of submodules.
Through the above description of the embodiments, those skilled in the art can be well understood to the present invention and can realize by hardware, also can realize by the mode that software adds necessary general hardware platform.Based on such understanding, technical scheme of the present invention can embody with the form of software product, it (can be CD-ROM that this software product can be stored in a non-volatile memory medium, USB flash disk, portable hard drive etc.) in, comprise some instructions with so that computer equipment (can be personal computer, server, the perhaps network equipment etc.) carry out the described method of each embodiment of the present invention.
It will be appreciated by those skilled in the art that accompanying drawing is the schematic diagram of a preferred embodiment, module in the accompanying drawing or flow process might not be that enforcement the present invention is necessary.
It will be appreciated by those skilled in the art that the module in the device among the embodiment can be distributed in the device of embodiment according to the embodiment description, also can carry out respective change and be arranged in the one or more devices that are different from present embodiment.The module of the foregoing description can be merged into a module, also can further split into a plurality of submodules.
The invention described above embodiment sequence number is not represented the quality of embodiment just to description.
More than disclosed only be several specific embodiment of the present invention, still, the present invention is not limited thereto, any those skilled in the art can think variation all should fall into protection scope of the present invention.
Claims (8)
1. a QinQ collocation method is characterized in that, may further comprise the steps:
Obtain QinQ relevant internal layer virtual LAN VLAN sign, outer VLAN identification and port;
Set up corresponding strategy according to described inner VLAN identification and described outer VLAN identification;
The application of policies of described foundation in port, is realized the QinQ configuration to port;
Wherein, describedly set up corresponding strategy according to described inner VLAN identification and described outer VLAN identification and comprise:
According to described inner VLAN identification, create the traffic classification corresponding with described inner VLAN identification;
According to described outer VLAN identification, create the Flow Behavior corresponding with described outer VLAN identification;
Described traffic classification and Flow Behavior are carried out correspondence obtain strategy.
2. the method for claim 1 is characterized in that,
Described according to described inner VLAN identification, create the traffic classification corresponding and comprise: in the tabulation of preserving traffic classification information, add new traffic classification record and corresponding described inner VLAN identification with described inner VLAN identification;
Described according to described outer VLAN identification, create the Flow Behavior corresponding and comprise: in the tabulation of preserving Flow Behavior information, add new Flow Behavior record and corresponding described outer VLAN identification with described outer VLAN identification;
Describedly described traffic classification and Flow Behavior are carried out correspondence obtain strategy and comprise: in preserving diplomatic tabulation, adds new strategy and write down the corresponding relation that described new traffic classification record and described new Flow Behavior write down.
3. the method described in claim 1 or 2 is characterized in that, also comprises: the QinQ configuration to port shows.
4. method as claimed in claim 3 is characterized in that, described QinQ configuration to port shows and comprises:
According to the strategy that port is used, obtain the traffic classification and the corresponding Flow Behavior of configuration under the described strategy;
Obtain inner VLAN according to described traffic classification, obtain outside VLAN according to described Flow Behavior;
Described port and corresponding inner VLAN and outside VLAN are shown.
5. a QinQ inking device is characterized in that, comprising:
Information acquisition unit is used to obtain QinQ relevant internal layer virtual LAN VLAN sign, outer VLAN identification and port;
Strategy is set up the unit, and the inner VLAN identification and the outer VLAN identification that are used for obtaining according to described information acquisition unit are set up corresponding strategy;
The QinQ configuration to port is realized in port in policy configurations unit, the application of policies that is used for described strategy is set up unit foundation;
Described strategy is set up the unit and is comprised:
Traffic classification is set up subelement, is used for according to described inner VLAN identification, creates the traffic classification corresponding with described inner VLAN identification;
Flow Behavior is set up subelement, is used for according to described outer VLAN identification, creates the Flow Behavior corresponding with described outer VLAN identification;
Strategy is set up subelement, is used for that described traffic classification and Flow Behavior are carried out correspondence and obtains strategy.
6. inking device as claimed in claim 5 is characterized in that,
Described traffic classification is set up subelement, specifically is used in the tabulation of preserving traffic classification information, adds new traffic classification record and corresponding described inner VLAN identification;
Described Flow Behavior is set up subelement, specifically is used in the tabulation of preserving Flow Behavior information, adds new Flow Behavior record and corresponding described outer VLAN identification;
Described strategy is set up subelement, specifically is used for preserving diplomatic tabulation, adds new strategy and writes down the corresponding relation that described new traffic classification record and described new Flow Behavior write down.
7. the inking device described in claim 5 or 6 is characterized in that, also comprises:
The configuration display unit is used for the QinQ configuration of port is shown.
8. inking device as claimed in claim 7 is characterized in that, described configuration display unit comprises:
First obtains subelement, is used for the strategy according to the port application, obtains the traffic classification and the corresponding Flow Behavior of configuration under the described strategy;
Second obtains subelement, is used for obtaining inner VLAN according to described traffic classification, obtains outside VLAN according to described Flow Behavior;
Show subelement, be used for described port and corresponding inner VLAN and outside VLAN are shown.
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| CN101567854B (en) * | 2009-05-26 | 2011-06-29 | 武汉烽火网络有限责任公司 | Ethernet data frame VLAN double-layer label processing device and method based on flow classification |
| CN101707562B (en) * | 2009-11-27 | 2012-01-25 | 中兴通讯股份有限公司 | Method and device for realizing access of virtual local area network (VLAN) stacking in virtual private wire service (VPWS) |
| CN101938388B (en) * | 2010-09-13 | 2014-12-10 | 中兴通讯股份有限公司 | Loop detection method and device in selective virtual local area network (SVLAN) |
| CN104967578B (en) * | 2015-07-08 | 2017-11-21 | 上海斐讯数据通信技术有限公司 | SDN controllers and interchanger, flow table management method and message processing method |
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| CN1838629A (en) * | 2005-03-24 | 2006-09-27 | 杭州华为三康技术有限公司 | Method for realizing virtual exchange using QinQ technique |
| CN1838627A (en) * | 2005-03-22 | 2006-09-27 | 杭州华为三康技术有限公司 | Method for realizing QinQ access |
| EP1713197A1 (en) * | 2004-02-07 | 2006-10-18 | Huawei Technologies Co., Ltd. | A method for implementing the virtual leased line |
| CN1960336A (en) * | 2006-11-02 | 2007-05-09 | 华为技术有限公司 | Method and equipment for realizing flexible QinQ |
| CN101227401A (en) * | 2008-02-19 | 2008-07-23 | 中兴通讯股份有限公司 | Data transmission system and method |
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| EP1713197A1 (en) * | 2004-02-07 | 2006-10-18 | Huawei Technologies Co., Ltd. | A method for implementing the virtual leased line |
| CN1838627A (en) * | 2005-03-22 | 2006-09-27 | 杭州华为三康技术有限公司 | Method for realizing QinQ access |
| CN1838629A (en) * | 2005-03-24 | 2006-09-27 | 杭州华为三康技术有限公司 | Method for realizing virtual exchange using QinQ technique |
| CN1960336A (en) * | 2006-11-02 | 2007-05-09 | 华为技术有限公司 | Method and equipment for realizing flexible QinQ |
| CN101227401A (en) * | 2008-02-19 | 2008-07-23 | 中兴通讯股份有限公司 | Data transmission system and method |
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