KR100912815B1 - Method for upload traffic aggregation and download traffic distribution in ethernet network device - Google Patents

Abstract

The present invention relates to an uplink traffic aggregation and a downlink traffic distribution method in an Ethernet network device.

According to the present invention, by using a part of a packet header, an intermediate node that is not directly connected to a subscriber can classify the packets by subscribers so that fair aggregation and distribution can be performed by the subscribers. In case of extension to the topology of the subscriber, the subscriber can use the band evenly among the end users regardless of the location of the stacking switch port. By using this method, it is possible to classify subscribers at low cost from intermediate nodes that are not directly connected to subscribers. Based on this, it can provide fair processing for each subscriber and guarantee quality of service according to each subscriber's billing.

Broadband Integrated Network, Ethernet, Subscriber Network, Subscriber Identification Tag, Aggregation and Distribution, Fairness

Description

Method for upload traffic aggregation and download traffic distribution in ethernet network device}

The present invention relates to a method for processing uplink traffic and downlink traffic in a subscriber network configured based on Ethernet technology, and more specifically, to aggregate and downlink uplink traffic that distinguishes subscribers using a subscriber identification tag of a portion of an Ethernet frame header. A method of distributing traffic.

The present invention is derived from a study conducted as a part of the IT new growth engine core technology development project of the Ministry of Information and Communication and the Ministry of Information and Communication Research and Development (Task Management Number: 2005-S-052-02, Task name: Multiservice Switch Development).

The subscriber network aims to equally aggregate the packets of a plurality of subscribers into one or a plurality of uplinks and to distribute the one or more uplink packets evenly to the subscribers for downlink traffic.

FIG. 1 shows an ideal configuration of a subscriber network that guarantees fairness among end users. For this purpose, as shown in FIG. By configuring using the corresponding high-capacity subscriber network device (100, 101) it is possible to manage all the subscriber port under the same conditions, it is possible to equalize the band management by measuring the change in the up and down traffic of the subscriber in real time. However, since the high-capacity subscriber network devices 100 and 101 are not preferable in view of cost and scalability, the general subscriber network has 8 to 24 ports for uplink traffic and downlink traffic as shown in FIG. It is configured by stacking Ethernet switches.

As shown in FIG. 2, when stacking aggregation switches are aggregated and distributed without classifying packets by subscribers, fairness between subscribers is not guaranteed, and aggregation and distribution are classified by flow using two or more layers of information in packets. This is very complicated and depends on services, addressing, etc.

On the other hand, when classifying and processing packets for each subscriber in the stacked network as shown in FIG. 2, a large capacity Ethernet network device as shown in FIG. 1 can be configured with a small capacity Ethernet switch, and all traffic of the subscriber can be processed under the same conditions.

For example, in the case of upstream traffic, as an example of the method used in the existing Ethernet switch, when a subscriber network services subscribers based on MAC or IP address, one subscriber may have multiple MAC or IP addresses. Assume a situation with an address (for example, when IPv6 is introduced). In this case, it is difficult for a malicious subscriber to virtually expand its bandwidth by using multiple MAC / IP addresses.

In addition, there is a big problem in the fairness (cousin fairness) between subscribers according to the location of the subscriber access. For example, in FIG. 2, subscriber 1 has fewer collisions with other uplink traffic because there are fewer subscriber devices to access uplink in comparison with subscriber 8. Therefore, subscriber 1 is more likely to receive services with a relatively wider bandwidth than subscriber 8. In this case, fairness between subscribers may be severely impaired. This problem is called a fairness problem between subscribers connected to different subtrees.

Secondly, the flow classification and QoS guarantee schemes recently used in the core network allow packets arriving at respective ports to be assigned to an IP source address, an IP destination address, a TCP / UDP protocol, a TCP / UDP source port, and a TCP / UDP. Based on the five parts of the destination port, it classifies into the unit of session, which is the basic communication unit of Internet service, and processes each packet based on this standard. This approach has the advantage of ensuring the communication quality of packets according to the characteristics of each communication session (eg VoIP sessions are very sensitive to delay). However, this approach has to manage a huge number of sessions and, accordingly, classify packets in real time, which results in a large storage space and processing burden and thus is not easy to implement. In particular, it is not appropriate to use such a technology in the subscriber network in consideration of implementation burden or cost. In this case, the fairness problem cannot be solved, and in order to solve this problem, the packet must be classified by the subscriber who sent each packet.

As described above, the existing subscriber network device does not classify or process packets based on the subscriber, and as a result, even aggregation and distribution between end users is impossible when the subscriber network is expanded to an arbitrary shape. Accordingly, in the technical field to which the present invention belongs, there has been a demand for the development of an efficient packet processing method for classifying and processing traffic for each subscriber in order to guarantee fairness among end users in the subscriber network extended to an arbitrary shape.

The technical problem to be solved by the present invention is to solve the above problems, when the subscriber network is expanded to any shape, each of the subscriber networks constituting the subscriber network so as to ensure a fair band regardless of the position of the connected port Upstream traffic aggregation and downstream traffic in an Ethernet network device that enables the switch to divide packets by subscribers based on subscriber identification tags using a part of an Ethernet frame header and process packets accordingly To provide a distribution method.

In order to solve the above technical problem, the uplink traffic aggregation method in the Ethernet network device, in the Ethernet network device constituting the subscriber network extended to any shape in a method for converging uplink traffic (a) directly connected to the subscriber A subscriber identification tag insertion step of inserting a tag indicating a subscriber in a corresponding packet header for upstream traffic input from the subscriber in the Ethernet device; (b) a subscriber uplink traffic classification step of classifying a corresponding packet by subscriber by reading a subscriber identification tag of each Ethernet frame of uplink traffic; And (c) an uplink packet processing step of processing uplink Ethernet frames classified by subscribers for each classified subscriber.

In order to solve the other technical problem, the downlink traffic distribution method in an Ethernet network device, in a method for distributing downlink traffic in an Ethernet network device constituting a subscriber network extended to any shape, (a) heterogeneous Ethernet Recovering subscriber identification information by extracting a subscriber identification tag inserted in the packet from information in a packet of downlink traffic inputted to the apparatus; (b) a subscriber downlink traffic classification step of classifying the downlink traffic packet for each subscriber according to the subscriber identification information; (c) a downlink packet processing step of processing downlink Ethernet frames classified by subscribers by classified subscribers; And (d) if the packet processed for each subscriber is a packet transmitted to a device that does not recognize the subscriber identification tag inserted in the packet, transmitting the downlink traffic for each subscriber by deleting the inserted subscriber identification tag. Characterized in that.

As described above, according to the present invention, by using a part of a packet header, an intermediate node that is not directly connected to a subscriber can classify packets by subscribers, thereby enabling fair aggregation and distribution by subscribers, and classifying packets by subscribers. In this case, when the subscriber network is extended to any topology, the band can be distributed evenly among the end users regardless of the location of the stacked switch ports. By using a part as a subscriber identification tag, an intermediate node that is not directly connected to a subscriber can be used to classify subscribers at a low cost and based on this, it can provide fair processing for each subscriber and guarantee quality of service for each subscriber's billing. .

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

3A illustrates an example of a flow of an uplink traffic aggregation method in an Ethernet network device according to the present invention.

When the packet arrives (step 300), it is checked whether the packet arrives at the port directly connected to the subscriber (step 310). This can be seen through the information contained in the packet.

In case of a packet of uplink traffic arriving at a port directly connected to a subscriber, the subscriber network device directly connected to the subscriber station inserts a tag indicating a subscriber in a portion of an Ethernet frame header of the packet (step 311). ).

The method of inserting the subscriber identification tag according to the present invention has four methods according to which part of the Ethernet frame header is used as the subscriber identification tag. Firstly, the VLAN part is used as a subscriber identification tag in the Ethernet frame according to IEEE 802.1Q, and second, the subscriber identification is identified in the S-VLAN part in the Ethernet frame according to the Q-in-Q method (standardization in progress with IEEE 802.1ad). There is a method used as a tag, third, a method of defining a new Ethernet type value and immediately inserting a subscriber identification tag, and fourth, a method of inserting a MPLS (Multiprotocol Label Switching) label indicating a subscriber in an Ethernet frame. The subscriber identification tag will be described in detail below in each case.

The intermediate node not directly connected to the subscriber receives the Ethernet frame in which the subscriber identification tag portion has already been inserted through step 311 at the previous node. Therefore, the intermediate node reads the subscriber ID of the subscriber identification tag portion inserted in step 311 and classifies the packet by subscriber (step 312).

The uplink Ethernet frame classified for each subscriber is processed for each classified subscriber (step 313). Through this, it is possible to realize fair service quality for each subscriber.

An example of processing for each subscriber is as follows.

In the uplink of FIG. 2, subscriber 1 is directly connected to a subscriber with respect to an Ethernet network device of node 1, and subscriber 2 is not directly connected with a subscriber to an Ethernet network device of node 1. For subscriber identification, it is assumed that a scheme of using a VLAN part as a subscriber identification tag in an Ethernet frame according to IEEE 802.1Q is used. For a packet input and received from the subscriber 1 to the node 1, the VLAN portion is inserted as '1' for subscriber identification, and for the packet input from the subscriber 2 to the node 2, the VLAN portion is inserted as the '2'. A packet arriving at node 1 via node 2 does not insert a subscriber tag because it is not a packet arriving from a directly connected port. Accordingly, in Node 1, the packet of Subscriber 1 and the packet of Subscriber 2 may classify the subscriber identity using a tag inserted in the VLAN portion and process the packet as upstream traffic. In the upstream packet processing (step 313), the upstream traffic inputted from the subscriber 1 to the node 1 and the upstream traffic inputted from the subscriber 2 to the node 1 through the node 2 are classified according to the subscriber tag, respectively. It determines whether to discard the uplink traffic according to priority or class, and guarantees and limits the band to the set band.

At this time, classifying and processing subscribers includes classifying according to the importance of traffic or classifying traffic flow in addition to the classification by subscribers to provide more detailed QoS (quality guarantee). In other words, classification by subscriber does not exclude the possibility of additional classification.

And the subscriber device implemented according to the present invention can recognize the subscriber identification tag and use it to classify subscribers, but it may cause malfunctions when packets are delivered to heterogeneous subscriber network devices or subscribers that do not recognize it. It is necessary to remove it. When the network apparatus according to the present invention transmits a packet to a heterogeneous network apparatus, the subscriber identification tag region used for subscriber identification is removed (steps 314 and 315) and the packet is sent (step 316).

3B illustrates an example of a flow of a downlink traffic distribution method in an Ethernet network device according to the present invention.

When the downlink packet arrives (step 319), when the traffic is connected to the heterogeneous Ethernet device and inputted, the subscriber identification tag inserted in the packet is extracted using the information in the packet, and the subscriber identification information corresponding to the packet is recovered ( Step 321).

The method of extracting the subscriber identification tag and recovering the subscriber identification information will vary depending on the method of inserting the subscriber identification tag, which will be described later.

In the intermediate node that is not directly connected to the subscriber, the corresponding packet is classified by subscriber from the subscriber identification information of each Ethernet frame of the downlink traffic (step 322), and the downlink Ethernet frame is processed in such a manner as to guarantee subscriber fairness (323). Step).

In the processing of the downlink packet (step 323), the downlink traffic inputted to the node 1 from the downlink is distinguished and classified by the subscriber tag, respectively, and it is determined whether to discriminate the downlink traffic according to priority or class. And guarantee and limit the band to the set band.

As in the case of the uplink packet, the subscriber tag is deleted (step 325) and the packet is sent (step 326) in order to prevent a case in which it is delivered to heterogeneous subscriber devices or subscribers and causes a malfunction.

FIG. 3C illustrates an example of an apparatus configuration for performing the method of FIG. 3A. The receiver 330 receives an uplink packet from the subscriber, the tag inserter 331 inserts a subscriber tag, the uplink traffic classifier 332 classifies the packet for each subscriber, and the uplink packet processor 333 receives the subscriber. The uplink tag deleting unit 334 removes the subscriber identification tag region by performing steps 314 and 315, and the sending unit 335 transmits the processed packet.

FIG. 3D illustrates an example of an apparatus configuration for executing the method of FIG. 3B. Receiving unit 340 receives the downlink packet, the tag recovery unit 341 restores the information on the subscriber from the subscriber identification tag included in the packet, the downlink traffic classifier 342 classifies the packet for each subscriber, the downlink The packet processing unit 343 processes the packet for each subscriber, and the downlink tag deleting unit 344 removes the subscriber identification tag area by performing steps 324 and 325, and the sending unit 345 transmits the processed packet.

Hereinafter, a subscriber identification tag inserted into a packet will be described for each embodiment.

First, a subscriber identification tag is inserted by recording an ID for identifying a subscriber by using bits allocated for VLAN ID in a VLAN tag of an Ethernet frame.

As shown in FIG. 4, the Ethernet frame according to IEEE 802.1Q has a form in which a portion 430 and a VLAN tag portion 440 defining a new Ethernet type in an existing Ethernet frame are added. Ethernet frames according to IEEE 802.1Q are used to configure virtual LANs between users. According to the first embodiment of the present invention, this VLAN tag 440 portion is used for other purposes. That is, the subscriber identification tag is inserted into the VLAN tag 440 area and used as a factor for identifying the subscriber.

The VLAN tag 440 has a portion 443 that records a 12-bit VLAN ID, and inserts a subscriber ID for identifying the subscriber. Subscriber ID is 1) Allocating to all subscriber ports in advance. 2) Each subscriber device has a method of allocating a new subscriber ID in connection with the authentication process at the start of a service. In the VLAN tag 440, there is a 3bit weighting portion 441. The packet is analyzed and the weight of the packet can be determined and recorded in this portion.

When recovering the subscriber identification information from the subscriber identification tag (step 321), the subscriber identification information is recovered from the value of the VLAN ID bit.

The advantage of this method is that only the first node needs weight analysis to reduce the burden of packet processing. On the other hand, if the original purpose of VLAN is not used, and heterogeneous network devices coexist, it may cause device malfunction. Therefore, you can think of how to define and use a new Ethernet type value to distinguish it from existing VLAN tags.

Second, the S-VLAN part is used as a subscriber identification tag in the Ethernet frame according to the Q-in-Q method which is being standardized by IEEE 802.1ad. That is, the S-VLAN tag is inserted into the Ethernet frame according to the Q-in-Q scheme, and the subscriber identification tag is inserted by recording the ID for distinguishing subscribers using all or part of bits allocated to the inserted S-VLAN tag. It is.

As shown in FIG. 5, the Ethernet frame according to the Q-in-Q scheme has another VLAN tag (521 through 523, S) before the existing VLAN tag portion (530, C-VLAN tag) in the Ethernet frame according to IEEE 802.1Q. -VLAN) is added.

The S-VLAN part defines a new Ethernet type (EtherType) value in front of the existing VLAN and uses the additional VLAN part for subscriber identification in order to prevent the lack of VLAN part while extending the area from the existing Ethernet to the macro Ethernet. The Ethernet frame transmitted from the subscriber device does not contain an S-VLAN tag. Accordingly, the S-VLAN portion (including the new Ethernet type value 510 and the S-VLAN tags 521 to 523) is inserted as shown in FIG. 5 in the subscriber network device directly connected to the subscriber. In the inserted S-VLAN portion, there is a portion 523 for recording a 12-bit VLAN ID. In this portion, a subscriber ID for identifying a subscriber is inserted. Subscriber ID is 1) Allocating to all subscriber ports in advance. 2) Each subscriber device has a method of allocating a new subscriber ID in connection with the authentication process at the start of a service.

In order to expand the number of subscribers served by the S-VLAN tag, the total 16 bits including the weight portion 521, the DE portion 522, and the VLAN ID portion 523 may be used as the subscriber ID in the S-VLAN portion. In this case, since the weight portion of the S-VLAN is not used, the weight portion 541 of the existing VLAN is used. Originally, the weighted part is defined in duplicate in S-VLAN and C-VLAN, so any part may be used.

According to the second embodiment of the present invention, since the existing VLAN function is supported through the C-VLAN tag and the S-VLAN is defined only in the macro area, the use in the subscriber network area does not cause a function conflict.

In this case, when recovering the subscriber identification information from the subscriber identification tag (step 321), the subscriber identification information is recovered from the value of all or some bits allocated to the S-VLAN tag.

As a third embodiment, a method of defining a new Ethernet type value and immediately inserting a subscriber identification tag may be used. That is, a field indicating that the Ethernet frame is a frame recording ID for identifying a subscriber and an ID for identifying a subscriber are inserted into the Ethernet frame to insert a subscriber identification tag.

As shown in FIG. 6, a new Ethernet type value 610 is defined without using an existing VLAN tag, and a subscriber identification tag 620 is inserted next to record an ID for identifying a subscriber.

This method has the disadvantage of using an Ethernet frame that does not conform to the standard, but has the advantage of using the subscriber identification tag format required for each purpose, and the flexibility of using the weight value for each packet for the purpose.

In this case, when recovering the subscriber identification information from the subscriber identification tag (step 321), the subscriber identification information is recovered from the tag for distinguishing the subscriber.

A fourth embodiment according to the present invention is a method of inserting an MPLS Label indicating a subscriber in an Ethernet frame. That is, an MPLS header is inserted into an Ethernet frame, and a subscriber ID tag is inserted by inserting a subscriber ID for distinguishing a subscriber into a part of recording an MPLS label included in the MPLS header.

As shown in FIG. 7, a multiprotocol label switching (MPLS) header portion 720 is positioned between an Ethernet header 710 of Layer 2 and an IP header 730 of Layer 3. MPLS technology is used to increase the processing speed and to reserve resources according to the path by processing the three-layer routing process through the two-layer switching process using the MPLS label pre-assigned along the path. .

In the fourth embodiment of the present invention, the MPLS label portion 721 is used as a portion for recording a tag for distinguishing subscribers. The Ethernet frame transmitted from the subscriber device contains almost no MPLS header. Therefore, the MPLS header including the MPLS label (20bit) 721, EXP (3bit) 722, S (1bit) 723 and TTL (8bit) 724 as shown in FIG. Insert The inserted MPLS header has a portion 721 for recording the MPLS label, and inserts a subscriber ID for identifying the subscriber.

The MPLS header part has no use problem in the subscriber network, so there is no collision problem, and since it is not included in the L2 header or the L3 header, it is easy to insert and delete, and has 20 scalability in total.

In this case, when recovering the subscriber identification information from the subscriber identification tag (step 321), the subscriber identification information is recovered from the part of recording the MPLS label.

According to the present invention, even when the subscriber network is expanded to an arbitrary shape, even the upper node not directly connected to the subscribers can classify the traffic for each subscriber and perform traffic processing based on the unit. As a result, even when the subscriber network is expanded to any shape, the processing of traffic is not discriminated according to the location where the subscriber is connected to the subscriber network and there is an advantage of ensuring fairness among the subscribers. In addition, according to the method of pre-determining the weight of the packet in the proposed first node and recording the weight in the S-VLAN, there is an advantage that it can be implemented with little computation and communication effort. Therefore, according to the method for ensuring fairness among end users in a subscriber network extended to an arbitrary shape according to the present invention, there is an advantage that the fairness between subscribers can be guaranteed with a small burden while facilitating the expansion and management of the subscriber network. .

In particular, even when the network is configured with heterogeneous network devices or when the subscriber network is configured in any shape using multiple Ethernet switches, Ethernet frames are classified by subscribers in the intermediate node that is not directly connected to the subscriber. When connected to a network device, the service quality can be guaranteed while maintaining compatibility.

Those skilled in the art will appreciate that the present invention can be implemented in a modified form without departing from the essential features of the present invention. Therefore, the disclosed embodiments should be considered in descriptive sense only and not for purposes of limitation. Examples included in the above description are introduced for the understanding of the present invention, and these examples do not limit the spirit and scope of the present invention. It will be apparent to those skilled in the art that various embodiments in accordance with the present invention in addition to the above examples are possible. The scope of the present invention is shown not in the above description but in the claims, and all differences within the scope will be construed as being included in the present invention.

In addition, it can be easily understood by those skilled in the art that each of the above steps according to the present invention can be variously implemented in software or hardware using a general programming technique.

And some steps of the invention may also be embodied as computer readable code on a computer readable recording medium. The computer-readable recording medium includes all kinds of recording devices in which data that can be read by a computer system is stored. Examples of computer-readable recording media include ROM, RAM, CD-ROM, CD-RW, magnetic tape, floppy disks, HDDs, optical disks, magneto-optical storage devices, and carrier waves (e.g. It also includes the implementation in the form of). The computer readable recording medium can also be distributed over network coupled computer systems so that the computer readable code is stored and executed in a distributed fashion.

1 illustrates an ideal configuration of a subscriber network that guarantees fairness among end users.

Figure 2 shows the configuration of a general subscriber network extended to any shape.

3A illustrates an example of a flow of an uplink traffic aggregation method in an Ethernet network device according to the present invention.

3B illustrates an example of a flow of a downlink traffic distribution method in an Ethernet network device according to the present invention.

3c illustrates an example of a configuration of an uplink concentrating device in an Ethernet network device according to the present invention.

3d illustrates an example of a configuration of a downlink traffic distribution device in an Ethernet network device according to the present invention.

4 illustrates a method of using a VLAN tag of an Ethernet frame according to the IEEE 802.1Q standard as a subscriber identification tag according to an embodiment of the present invention.

5 is a view illustrating a method of using an S-VLAN tag of an Ethernet frame as a subscriber identification tag according to a Q-in-Q scheme according to an embodiment of the present invention.

6 illustrates a method of inserting and using a subscriber identification tag immediately after a new Ethernet type field using a new Ethernet type according to an embodiment of the present invention.

7 illustrates a method of using a label portion of an MPLS header as a subscriber identification tag according to an embodiment of the present invention.

Claims (14)

In the method of converging uplink traffic in an Ethernet network device constituting an extended subscriber network in an arbitrary shape, (a) a subscriber identification tag insertion step of inserting a tag indicating a subscriber in a corresponding frame header for upstream traffic input from the subscriber in an Ethernet device directly connected to the subscriber; (b) a subscriber uplink traffic classification step of classifying a corresponding packet by subscriber by reading a subscriber identification tag of each Ethernet frame of uplink traffic; And (c) an uplink packet processing step of processing uplink Ethernet frames classified by subscribers by classified subscribers; and (d) deleting the subscriber identification tag of the upstream traffic for deleting the inserted subscriber identification tag when the uplink packet processed for each subscriber is a packet transmitted to a device that does not recognize the subscriber identification tag inserted in the step (a). Uplink aggregation method in the Ethernet network device comprising a. The method of claim 1, In the step (a), the uplink traffic aggregation method in the Ethernet network device, characterized in that to insert the subscriber identification tag by recording the ID for subscriber identification using the bits allocated for the VLAN ID in the VLAN tag of the Ethernet frame. . The method of claim 1, In step (a), the S-VLAN tag is inserted into the Ethernet frame according to the Q-in-Q scheme, and the ID for identifying the subscriber is recorded using all or part of bits allocated to the inserted S-VLAN tag. Uplink traffic aggregation method in an Ethernet network device, characterized by inserting a subscriber identification tag. The method of claim 1, In the step (a), the Ethernet network, characterized in that the subscriber identification tag is inserted in a manner that inserts a field indicating that the Ethernet frame is a frame for recording the ID for subscriber identification and ID for subscriber identification into the Ethernet frame. Upstream traffic aggregation method in the device. The method of claim 1, In the step (a), the Ethernet network, characterized in that the insertion of the subscriber identification tag by inserting the MPLS header in the Ethernet frame, the subscriber ID for subscriber identification in the part of recording the MPLS label included in the MPLS header Upstream traffic aggregation method in the device. The method of claim 1, Processing the uplink packet for each subscriber in step (c), A method of concentrating uplink traffic in an Ethernet network device, characterized in that it is determined whether to discriminate uplink traffic according to priority or class for each subscriber, or to guarantee or limit bandwidth to a predetermined band. delete The method of claim 1, The step (b) of the uplink traffic aggregation method in the Ethernet network device, characterized in that can be executed in the intermediate node that is not directly connected to the subscriber. A method for distributing downlink traffic in an Ethernet network device configuring a subscriber network extended to an arbitrary shape, (a) recovering subscriber identification information by extracting a subscriber identification tag inserted in the packet from information in a packet of downlink traffic input and connected to heterogeneous Ethernet devices; (b) a subscriber downlink traffic classification step of classifying the downlink traffic packet for each subscriber according to the subscriber identification information; (c) a downlink packet processing step of processing downlink Ethernet frames classified by subscribers by classified subscribers; And (d) if the downlink packet processed for each subscriber is a packet transmitted to a device that does not recognize the subscriber identification tag inserted in the packet, transmitting the downlink traffic for each subscriber by deleting the inserted subscriber identification tag; Downlink traffic distribution method in an Ethernet network device, characterized in that. The method of claim 9, In the step (a), when the inserted subscriber identification tag records the ID for subscriber identification using the bits allocated for the VLAN ID in the VLAN tag of the Ethernet frame, and the subscriber identification tag is inserted, the VLAN ID bit. A method for downlink traffic distribution in an Ethernet network device, comprising recovering subscriber identification information from a value of. The method of claim 9, In step (a), the S-VLAN tag is inserted into the Ethernet frame according to the Q-in-Q scheme, and the ID for identifying the subscriber is recorded by using all or part of bits allocated to the inserted S-VLAN tag. If the subscriber identification tag is inserted, the downlink traffic distribution method in the Ethernet network device, characterized in that to recover the subscriber identification information from the value of all or some bits assigned to the S-VLAN tag. The method of claim 9, In step (a), if the field indicating that the Ethernet frame is a frame recording ID for identification of a subscriber and the ID tag for identification of a subscriber are inserted in the Ethernet frame, subscriber identification information is obtained from the tag for identification of a subscriber. Downlink traffic distribution method in an Ethernet network device characterized in that the recovery. The method of claim 9, In the step (a), the MPLS header is inserted into the Ethernet frame, and the subscriber ID tag is inserted into the part of recording the MPLS label included in the MPLS header. A method for downlink traffic distribution in an Ethernet network device, characterized in that recovering subscriber identification information from a recording portion. The method of claim 9, Processing the downlink packet for each subscriber in step (c), A method for downlink traffic distribution in an Ethernet network device, characterized in that it is determined whether to discriminate downlink traffic according to priority or class for each subscriber, or to guarantee or limit bandwidth to a predetermined band.

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