CN100391203C - End-to-end processing method and device for Ethernet services in metropolitan area network - Google Patents

Abstract

The present invention relates to an end-to-end processing method for Ethernet services in a metropolitan area network and a device. The method comprises the steps that a label corresponding to a node port for connecting the metropolitan area network and an external network is set; when service signals of the external network are input, corresponding labels are added to the input service signals or the labels of the service signals are converted based on the input node port and label information, and the service signals are routed, converged and processed in a distributed mode according to the labels in the metropolitan area network; the added label information is stripped or converted by an output port of the metropolitan area network so that the original input service signals are deoxidized. The device of the present invention comprises an interface processing unit, a label processing unit and a label routing unit. The method and the device can avoid that the statistic duplication of the Ethernet services can be achieved only by searching and forwarding based on MAC addresses, and can achieve service isolation and increase the utilization ratio of network bandwidth.

Description

End-to-end processing method and device for Ethernet services in metropolitan area network

technical field

The invention relates to a metropolitan area network, in particular to an end-to-end processing method and device for Ethernet services in the metropolitan area network.

Background technique

With the development of IP and network technology, the number of network users is growing rapidly and broadband services are constantly enriched. Operators can provide users with web browsing, online transactions, video downloads, IP voice, Video/Audio streaming, VoD, multimedia interaction, video Conferencing, distance education, VPN, private data line and other services, these services promote the bearer network to follow the corresponding development.

In terms of bearer network, with the substantial increase and gradual improvement of the backbone network and access network capacity, the business subject of the metropolitan area network is also undergoing profound changes, and a large amount of business traffic is concentrated in the metropolitan area. With the development of IP, more and more users and operators use a large number of large-granularity GE channels to realize broadband data interconnection. The operation network is shifting from the backbone network to the metropolitan area network. Ethernet technology has become the main networking technology in the metropolitan area network. How to solve the transmission of a large number of large-grained Ethernet services is a key issue for the metropolitan area transport network.

The technical scheme of prior art one:

At present, in the metropolitan area network, two-layer switch interconnection networking, MSTP (multi-service platform) and metropolitan area WDM (wavelength division multiplexing) are mainly used to interconnect the ingress layer and the core layer network.

For the situation that the two-layer switch interconnection network is used as a metropolitan area network, the convergence and forwarding of Ethernet services are realized through the search and forwarding of MAC (Media Access Control) addresses.

Layer 2 switching based on MAC address learning and forwarding is limited by the size of the MAC address table of the switch, and at the same time, service isolation between ports cannot be achieved. For example, in the bearer network, the normal service flow is that the Ethernet frames uploaded by each downstream access layer device are sent to the core layer node through the aggregation layer. The aggregation layer nodes directly communicate with each other to form a network, and operators cannot manage the entire network.

In Layer 2 switching based on MAC address learning and forwarding, if the received Ethernet frame cannot find the output port, it will broadcast to all other ports except the received source port. When the scale of the network formed by the Layer 2 switches increases, this kind of broadcast will cause a large load on the network and affect the performance of other business processing. Therefore, the Ethernet standard organization has introduced the definition of VLAN (Virtual Local Area Network), which divides a large local area network into multiple smaller virtual local area networks. For packets with unknown destination addresses and broadcast packets, they are limited to broadcast within the same VLAN, and will not be broadcast to the entire LAN.

The introduction of VLAN can reduce the cost of moving and changing. When a network moves from one location to another, its network attributes can be connected to the network without reconfiguration; it has the security of VLAN isolation, and VLAN is configured Finally, the data packets of one VLAN will not be sent to another VLAN, so that the users of other VLANs cannot receive any data packets of this VLAN on the network, and the confidentiality of information is realized.

The frame format of the VLAN frame is that a 4-byte VLAN domain is added after the source MAC address of the Ethernet frame. The 4-byte 802.1Q tag header contains a 2-byte tag protocol identifier (TPID--TagProtocol Identifier, whose value is 8100), and a two-byte tag control information TCI (TCI--TagControlInformation) . The TCI field contains a 12-bit VLAN tag value (VLAN ID). The 12-bit VLAN ID has a total of 4096 values, of which 12-bit is all 0 and all 1 (that is, 0 and 4095) are reserved values. Another 4094 VLAN ID (1~4094) values can be used by users.

As mentioned earlier, the use of VLANs can restrict broadcast packets and implement security isolation between users. Therefore, in a network environment, VLANs need to be planned to prevent VLAN conflicts between different users. This planning process is easy to implement when the network scale is small. When the network scale continues to expand and the number of users increases, more and more requirements are placed on VLANs, and user requirements are unpredictable, making VLAN planning difficult. Therefore, VLAN and Layer 2 switching based on MAC addresses also face the embarrassment of insufficient resources.

The shortcoming of prior art one:

1. When Layer 2 switches are interconnected to form a metropolitan area network to carry a large number of Ethernet services, the processing mechanism of Layer 2 switches based on MAC address learning and forwarding limits the application range of Layer 2 switches, and it is impossible to use Layer 2 switches to build large metropolitan areas. LAN;

2. Layer 2 switches are used to establish the MAN by fiber direct connection. The network structure of the MAN is complex, and the fiber direct connection method has a huge demand for fiber resources. In some network applications, it is impossible to provide sufficient fiber resources;

3. There is no protection mechanism for building a metropolitan area network with layer-2 switches, and it cannot provide the SLA (service level agreement) required by the metropolitan area network;

4. The Layer 2 switch adopts the MAC-based learning and forwarding mechanism, which cannot realize the business isolation between the access devices at the same level below the Layer 2 switch, and lacks security guarantees;

5. The use of VLAN technology requires unified management of the entire network, which is difficult to implement and has limited resources.

The technical scheme of prior art 2:

Adopt MSTP, introduce a layer-2 switching mechanism for Ethernet services to converge and converge Ethernet services, and then encapsulate them through GFP (General Framing Processing), LAPS (Link Access Procedure SDH: link access procedure on SDH) The processing is mapped to the SDH (Synchronous Digital Hierarchy) virtual container, and STM-16 and STM-64 frame signals are formed by interleaving and multiplexing for transmission in the metropolitan area network, and converged to the core layer network for processing through the central node.

The shortcoming of prior art two:

1. The line processing of MSTP is based on the traditional SDH/SONET (Synchronous Digital Hierarchy/Synchronous Optical Network) technology, which can only provide 2.5Gbps/10Gbps transmission bandwidth. The Ethernet interface of the access layer network currently provides GE (Gigabit Ethernet), FE (Fast Ethernet) interface, MSTP cannot provide the large-capacity bandwidth required by the access network;

2. In the MSTP bearer system, the introduction of a layer-2 switching mechanism for Ethernet services to process Ethernet services has the same problem of being limited to the MAC address space as the layer-2 switch networking;

3. Similar to the prior art 1, it cannot achieve service isolation between different downlink ports, and lacks security guarantee.

The technical scheme of prior art three:

There are several ways to use the MAN WDM system to carry Ethernet services:

(1) Using WDM wavelength resources, each wavelength carries an Ethernet service, and each wavelength is used as a pipe for interconnecting Ethernet services between the access network and the core network, such as GE or FE, and then using WDM The multiplexing method converges multiple wavelengths, and the generated multi-wavelength signals are carried by one optical fiber;

(2) Use existing chip technology to transparently aggregate multiple Ethernet services into a large-capacity wavelength pipeline, for example, use chip technology to transparently aggregate two GE services into a wavelength with a bandwidth of 2.5Gbps, and then use the Division multiplexing technology converges multiple wavelengths into one optical fiber for transmission.

Disadvantage of the third prior art: the transparent transmission of GE and FE signals seriously wastes the line bandwidth; while in the metropolitan area network, the cost of the line bandwidth occupies a large proportion.

Contents of the invention

The present invention provides an end-to-end processing method and device for Ethernet services in a metropolitan area network, which are used to solve the problems in the prior art that there are insufficient MAC addresses and traditional VLAN tags for service signals based on Layer 2 switching. Provides security guarantees that service ports are isolated from each other and improves network bandwidth utilization.

One of the end-to-end processing methods of Ethernet services in the metropolitan area network provided by the present invention includes: setting the label corresponding to the node port connected to the metropolitan area network and the external network, and when the service signal of the external network is input, execute Follow these steps:

A1. Add the label information corresponding to the input node port to the service signal for encapsulation;

B1. The network node performs routing, aggregation and distribution processing on the received service signal according to the label information;

C1. When reaching the output node port, the added label information is stripped to restore the input service signal.

Described setting the label corresponding to the node port that the metropolitan area network is connected with the external network, the specific method is: on the node that the metropolitan area network is connected with the external network, store a piece of the port that this node is connected with the external network and its Label correspondence table.

Said step A1 comprises:

A11. According to the input port of the service signal, search for the corresponding relationship table;

A12. Add the matched label information to the service signal for encapsulation.

According to the above method of the present invention, each network node stores a label forwarding table of the node, including label information and corresponding member port information; said step B1 includes:

B11. The node extracts the tag information added in the service signal;

B12. Search the label forwarding table, and match the member port corresponding to the label information;

B13. Perform forwarding processing on the service signal through the member port.

In the step B12, if multiple services with different label information are matched to the same forwarding port, a step of integrating the multiple services into one transmission channel is also included.

The second end-to-end processing method of the Ethernet service in the metropolitan area network provided by the present invention includes: setting the label corresponding to the node port connected to the metropolitan area network and the external network, and when the service signal of the external network is input, execute Follow these steps:

A2. Determine whether the service signal has its own label, if so, keep its own label; otherwise, add the label information corresponding to the input node port to the service signal for encapsulation;

B2. The network node performs routing, aggregation and distribution processing on the received service signal according to the self-contained label or the added label information;

C2. When reaching the output node port, the added label information is stripped to restore the input service signal.

The label corresponding to the node port connecting the metropolitan area network and the external network is set, and the specific method is: on the node connecting the external network in the metropolitan area network, store a piece of the port and the label of the node connected to the external network The corresponding relationship table.

In step A2, the label information corresponding to the input node port is added to the service signal, including:

A21. According to the input port of the service signal, search for the corresponding relationship table;

A22. Add the matched label information to the service signal without its own label for encapsulation.

According to the above method of the present invention, each network node stores a label forwarding table of this node, including self-owned label and added label and corresponding member port information; said step B2 includes:

B21. The node extracts self-labeled or added label information in the service signal;

B22. Search the tag forwarding table, and match the member port corresponding to the self-labeled or added tag;

B23. Perform forwarding processing on the service signal through the member port.

In the step B22, if multiple services with different label information are matched to the same forwarding port, a step of integrating the multiple services into one transmission channel is also included.

The third end-to-end processing method for Ethernet services in the metropolitan area network provided by the present invention is to allocate new labels according to the node ports connected to the metropolitan area network and the external network and the input service label information. When the service signal of the external network is input , perform the following steps:

A3. Determine whether the service signal has its own label, if so, convert the self-contained label into a unified management label within the network according to the input node port and label information, and record the converted label information corresponding to the self-contained label; otherwise, in the Add label information corresponding to the input node port to the above service signal for encapsulation;

B3. The network node performs routing, aggregation and distribution processing on the received service signal according to the converted label or added label information;

C3. When reaching the output node port, the converted label is restored to the corresponding self-contained label, or the added label is stripped to restore the input service signal.

According to the above-mentioned method of the present invention, the node connected to the external network in the metropolitan area network stores a label conversion table of the port connected to the external network and the input label of the node.

In the label conversion table of the port connected to the external network and the input label, if the same port has multiple different types of service signals input, then different conversion labels are set for the different types of service signals input from the port .

According to the above-mentioned method of the present invention, each network node stores a label forwarding table of this node, including converting labels and adding labels and corresponding member port information through all ports of this node; said step B3 includes:

B31. The node extracts the conversion label or adds label information in the service signal of each input port;

B32. Search the label forwarding table, and match the corresponding member ports;

B33. Perform forwarding processing on the service signal through the member port.

In the step B32, if multiple services with different label information are matched to the same forwarding port, a step of integrating the multiple services into one transmission channel is also included.

The present invention also provides an end-to-end processing device for Ethernet services in a metropolitan area network, including: an interface processing unit, a label processing unit, and a label routing unit;

The interface processing unit is responsible for processing the input and output Ethernet service signals at the physical layer and the media access control layer;

In the service input direction of the user side, the label processing unit generates corresponding label information according to the node port of the input Ethernet signal and the input label information; in the input direction of the network side, the label analysis is performed on the input signal, and label restoration or stripping processing is performed ;

The label routing unit integrates, schedules and distributes the service signals according to the label information according to the label forwarding table of the node.

The beneficial effects brought by the technical solution of the present invention are as follows:

1. The present invention avoids the use of MAC address-based lookup and forwarding to realize the statistical multiplexing of Ethernet services, solves the limitation of the MAC address table, and the complexity of using the MAC address table lookup and forwarding processing and the decline in business performance ;

2. The present invention establishes a set of tags used in the metropolitan area network, and processes service signals based on the tags, without being limited by the 4K limit of Ethernet VLAN tags, and does not require the operator to carry out the MAN band Unified planning for multiple access network VLANs;

3. By adopting the method of the present invention, the ports of the same level will not conflict due to labels, so that the business from one customer network will not be forwarded to another customer network, and business isolation is realized;

4. The present invention can integrate client services from different ports into the same transmission channel for transmission, and meanwhile improve bandwidth utilization.

Description of drawings

Fig. 1 is a flowchart of an end-to-end processing method for Ethernet services in a metropolitan area network provided by the present invention;

Fig. 2 is a schematic diagram of adding a label in the method of the present invention;

Fig. 3 is the second flowchart of the end-to-end processing method of Ethernet service in the metropolitan area network provided by the present invention;

Fig. 4 is a schematic diagram of two-node label forwarding in the method of the present invention;

Fig. 5 is three flow charts of the end-to-end processing method of Ethernet service in the metropolitan area network provided by the present invention;

Fig. 6 is a schematic diagram of three-node label conversion in the method of the present invention;

Fig. 7 is a schematic diagram of the structure of the device of the present invention.

Detailed ways

The present invention provides an end-to-end processing method 1 for Ethernet services in a metropolitan area network. Referring to FIG. 1, the method includes:

Assign labels based on nodes + ports: No matter whether the service has label information or not, a layer of labels is uniformly added to the service signal according to the node + port information; each node in the metropolitan area network only recognizes the label information, and aggregates the packet services according to the label , Scheduling and distribution processing. At the output port of the metro network, the label information added by the transport network is stripped. The label added to the input port is uniformly stipulated by the metropolitan area network. Each input and output node in the network maintains a node + port and label allocation correspondence table. Label resources are allocated according to the node + port, and the label can be flexibly changed according to the size of the network. The length of the region. Compared with the traditional VLAN tag processing, this kind of processing is effective inside the metropolitan area network and managed by the metropolitan area network. It does not need to be limited by the number of VLAN tags. At the same time, it can shield VLAN tag conflicts caused by different customers due to their own planning. Condition.

The specific label allocation method is shown in Figure 2. In the private line service network application, a unique label is allocated to the input Ethernet frame at the input port of each node, as shown in Table 1 below:

Table I:

The port number Label P11 V1 P12 V2 P13 V3 P21 V4 P22 V5 P31 V6 P41 V7 P42 V8

That is, the N1 node in the figure has ports P11, P12, and P13, and the corresponding labels are V1, V2, and V3; the N2 node has ports P21 and P22, and the corresponding labels are V4 and V5; the N3 node has a port P31, corresponding to The assigned label is V6; the N4 node has ports P41 and P42, and the corresponding assigned labels are V7 and V8; and the assigned label is encapsulated for each input frame service, and only the label information is identified inside the network, and multiple same routes can be The label service flow is aggregated into a physical pipeline, which is transmitted to the destination node by the physical pipeline, and multiple service flows are separated from the output port of the destination node according to the label information, and the services are stripped at the output port.

Fig. 3 is the end-to-end processing method two flow charts of Ethernet business in the metropolitan area network provided by the present invention, and this method is specifically:

For the packet service signal input by each port, if the service signal has its own label, the service signal will not be processed; if the service signal has no label information, according to the node + port information, a unified The labels assigned by the MAN can be planned in a unified manner with the labels of the input packet services, or another label system that is completely different from the labels of the services can be used to distinguish the two sets of labels within the MAN , and perform aggregation, scheduling, and distribution processing of service signals among network nodes according to the label information carried by each service signal. At the output port of the metro network, according to the corresponding relationship between the added label and the node + port, the label information added by the metro network is stripped, and the label provided by the user service remains unchanged.

The specific way of aggregation, scheduling and distribution processing of service signals by network nodes is shown in Figure 4. It is a convergent service model. The services of nodes C, D, E, and F are all converged to node A. Tag1 in the figure -Tag8 is the label assigned to the corresponding port by the metropolitan area network. Assume that nodes C, D, E, and F all have four ports, namely port 1, port 2, port 3, and port 4, and port 1 and port 2 are external The input port of the network, port 3 and port 4 are the transmission ports inside the network. In order to converge the input service signals from nodes C, D, E, and F to node A, each node is configured with a label forwarding table, which stipulates the corresponding relationship between the label and the port of the node, indicating that all labels in the node The included port members, according to the label forwarding table, realize the aggregation, distribution and integration of service signals based on label information. Taking node F as an example, its label forwarding table is shown in Table 2:

Table II:

Label port port Tag1 Port 1 Port 3 Tag2 Port 2 Port 3 Tag3 Port 3 Port 4 Tag4 Port 3 Port 4 Tag5 Port 3 Port 4 Tag6 Port 3 Port 4 Tag7 Port 3 Port 4 Tag8 Port 3 Port 4

According to the above table, the Tag1 tag corresponds to ports 1 and 3, indicating that when a frame containing the Tag1 tag information is received from port 1, it is directly forwarded to port 3 for output; in turn, the Tag1 tag frame received from port 3 is directly forwarded to port 1; Similarly, the Tag3 label corresponds to ports 3 and 4, indicating that when a frame of Tag3 label information is received from port 4, it is directly forwarded to port 3; thus, for F nodes, tag frames from ports 1, 2, and 4 are all forwarded to The output of port 3 has the same routing and can be integrated into one transmission channel for transmission, reducing the occupied transmission bandwidth.

The above method can process service signals at a service level smaller than that of a port. If a port contains multiple service signals with different labels, each label service signal can be processed differently and implemented at a level smaller than the port. The end-to-end processing of services improves the bandwidth utilization of the transport network.

Fig. 5 is three flow charts of the end-to-end processing method of Ethernet business in the metropolitan area network provided by the present invention, and this method comprises:

For unlabeled frame input signals, tags are assigned based on node + port; for tagged frame input signals, according to the input node port and input label information in the label conversion protocol table, the service self-contained labels are converted into corresponding labels defined by the transmission network. Each node in the metropolitan area network maintains a label switching protocol table. The node, port, original label identifier (with or without label), original label value (label information of the service itself) of the storage network in the label conversion protocol table, and the label assigned by the transmission network based on the node + port and the original label value (new label ). The format of the label conversion protocol table is shown in Table 3 below.

Table three:

node label port label Original label identification original label new tab N1 P11, P12, ... P1m 1: indicates that the packet service has its own label; 0: indicates that the packet service has no label VLAN ID (for the case where the tag ID is 0, this area is empty) Label1j(j＝1～m) N2 P21, P22,..., P2n 1/0 VLAN ID Label2j(j＝1～n) ... Ni Pi1, Pi2, ..., PiL 1/0 VLAN ID Labelij(j＝1～L)

In the metropolitan area network, according to the new label information generated by the label protocol conversion table, the service integration, aggregation and distribution processing are carried out, and the original label, node and port information of the service signal is analyzed at the output port according to the new label information, and the original label is restored. , or strip the new labels directly from the network output. This method combines the processing of the previous two methods and is applicable to various types of business processing.

Figure 6 is a specific label conversion example. As shown in Figure 6, a WDM ring network composed of 6 nodes is shown in the figure, and each node includes a WDM wavelength division multiplexing unit in addition to a label mapping service processing unit (the wavelength division multiplexing unit includes multiple Multiplexing processing of GE services, and wavelength division multiplexing processing on wavelengths), the label mapping service processing unit can be integrated in the WDM system. The figure shows the service flow sent by each port of node D to other nodes. In node D, the input service of port P1 includes three labels V1, V2, and V3, the input service of port P2 includes two labels V4, V7, the input service of port P4 includes two labels V6, V9, and the service of port P3 and port P5 Signals are not labeled. The figure shows the routes of various types of services input by the node in the network. Therefore, a node, port, and label conversion relationship table can be established at node D as shown in Table 4 below:

Table four:

node number The port number original tag mark original tag value new tab D 1 1 V1 T1 D 1 1 V2 T2 D 1 1 V3 T3

D 2 1 V4 T4 D 2 1 V7 T5 D 3 0 T6 D 4 1 V6 T7 D 4 1 V9 T8 D 5 0 T9

After adding/converting new label information to various services at the input port, the services are processed separately according to their routes in the network. Among them, the service transmission destinations corresponding to tags T1, T4, and T7 are node A, and the service transmission destination corresponding to label T2 is node C, and the total bandwidth allocated by the three services does not exceed GE, so these four types of services can be integrated In a GE, in a WDM system, multiple GEs can be multiplexed and multiplexed into a 2.5Gbps and higher rate wavelength. The service transmission destination corresponding to label T3 is node E, and the service transmission destination corresponding to label T5 is node F. The two types of services can be integrated into one GE. Similarly, the three types of services corresponding to labels T6, T8, and T9 are integrated into one GE In GE, multiple GEs are multiplexed into a wavelength with a higher rate, which is carried by the WDM ring network in the form of wavelength. When reaching each destination node, multiple labels transmitted in the same GE channel are separated according to the label information carried by various services. For the label business whose purpose is not the local node, carry out corresponding processing and continue to transmit to the next node. For the label business downloaded at the local node, restore the original label according to the label mapping relationship table, or strip the label, and output it to the user.

According to the end-to-end processing methods of the above three types of Ethernet services in the MAN provided by the present invention, the present invention also provides a corresponding implementation device.

The end-to-end processing device for Ethernet services in the MAN provided by the present invention, as shown in FIG. 7 , mainly includes three parts: an interface processing unit, a label processing unit, and a label routing unit. The interface processing unit is responsible for processing the input and output Ethernet signals at the PHY (physical layer) and MAC (media access control) layers. The label processing unit performs node, port and label analysis on the Ethernet signal in the service input direction of the user side, and generates corresponding label information according to the corresponding relationship table between labels and node ports, and adds it to the input service signal frame; in the input direction of the network side , perform label analysis on the input signal, and perform label restoration or stripping processing according to the corresponding relationship table between labels and node ports. The label routing unit integrates the service signals of different labels according to the information in the node label forwarding table, and performs scheduling, distribution and other processing on the service signals based on the label information.

Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalent technologies, the present invention also intends to include these modifications and variations.

Claims (16)

1. the end-to-end processing method of Ethernet service in the MAN is characterized in that, sets the pairing label of node port that MAN is connected with external network, when the service signal input of external network, and execution the following step:

A1, the label information of input node port correspondence added in the described service signal encapsulate;

B1, network node carry out route, converge and distribution processor the service signal that receives according to described label information;

C1, when arriving the output node port, then the label information that adds is peeled off, restore the service signal of input.

2. the method for claim 1, it is characterized in that, the pairing label of node port that described setting MAN is connected with external network, concrete grammar is: the port that storage one anticipatory remark node is connected with external network on MAN and node that external network is connected and the mapping table of label thereof.

3. method as claimed in claim 2 is characterized in that, described steps A 1 comprises:

A11, according to the input port of service signal, search described mapping table;

A12, the label information that matches added in the described service signal encapsulate.

4. method as claimed in claim 3 is characterized in that each network node stores has the Label Forwarding Information Base of this node, comprises label information and corresponding member port information thereof; Described step B1 comprises:

B11, node extract the label information that adds in the service signal;

B12, search described Label Forwarding Information Base, match the member port of this label information correspondence;

B13, service signal is transmitted processing by described member port.

5. method as claimed in claim 4 is characterized in that, among the described step B12, if when a plurality of business that have different label informations match same forwarding port, also comprises the step with this a plurality of business integrations to a transmission channel.

6. the end-to-end processing method of Ethernet service in the MAN is characterized in that, sets the pairing label of node port that MAN is connected with external network, when the service signal input of external network, and execution the following step:

A2, whether judge described service signal from tape label, if then keep it from tape label; Otherwise the label information of input node port correspondence added in the described service signal encapsulate;

B2, network node carry out route, converge and distribution processor the service signal that receives according to described label information from tape label or interpolation;

C2, when arriving the output node port, then the label information that adds is peeled off, restore the service signal of input.

7. method as claimed in claim 6, it is characterized in that, the pairing label of node port that described setting MAN is connected with external network, concrete grammar is: the port that storage one anticipatory remark node is connected with external network on the node of connection external network in MAN and the mapping table of label thereof.

8. method as claimed in claim 7 is characterized in that, the label information with input node port correspondence described in the steps A 2 adds in the described service signal, comprising:

A21, according to the input port of service signal, search described mapping table;

A22, the label information that matches added to describedly in the service signal of tape label, do not encapsulate.

9. method as claimed in claim 8 is characterized in that each network node stores has the Label Forwarding Information Base of this node, comprises from tape label and interpolation label and corresponding member port information thereof; Described step B2 comprises:

B21, node extract in the service signal from tape label or add label information;

B22, search described Label Forwarding Information Base, match this from tape label or add the pairing member port of label;

B23, service signal is transmitted processing by described member port.

10. method as claimed in claim 9 is characterized in that, among the described step B22, if when a plurality of business that have different label informations match same forwarding port, also comprises the step with this a plurality of business integrations to a transmission channel.

11. the end-to-end processing method of Ethernet service in the MAN, it is characterized in that, the node port and the incoming traffic label information that are connected with external network according to MAN distribute new label, when the service signal of external network is imported, carry out the following step:

A3, whether judge described service signal, if then will convert the label of network internal unified management from tape label to, and record is from the switch labels information of tape label correspondence according to input node port and label information from tape label; Otherwise the label information that adds input node port correspondence in described service signal encapsulates;

B3, network node carry out route, converge and distribution processor the service signal that receives according to described switch labels or interpolation label information;

C3, when arriving the output node port, then switch labels is reduced to correspondingly from tape label, maybe with the label peeling that adds, restore the service signal of input.

12. method as claimed in claim 11 is characterized in that, the port that storage one anticipatory remark node is connected with external network on the node of connection external network in MAN and the label conversion table of input label.

13. method as claimed in claim 12, it is characterized in that, in the label conversion table of described port that is connected with external network and input label, if same port has a plurality of dissimilar service signals inputs, then different switch labels is set respectively for dissimilar service signal from this port input.

14. method as claimed in claim 13 is characterized in that, each network node stores has the Label Forwarding Information Base of this node, comprises switch labels and interpolation label and corresponding member port information thereof by this node all of the port; Described step B3 comprises:

B31, node extract the switch labels in each input port service signal or add label information;

B32, search described Label Forwarding Information Base, match corresponding member port;

B33, service signal is transmitted processing by described member port.

15. method as claimed in claim 14 is characterized in that, among the described step B32, if when a plurality of business that have different label informations match same forwarding port, also comprises the step with this a plurality of business integrations to a transmission channel.

16. the end-to-end processing unit of Ethernet service is characterized in that in the MAN, comprising: interface processing unit, tag processes unit and label routing unit;

Described interface processing unit is responsible for the Ethernet service signal of input and output is carried out the processing of physical layer, media access control layer;

Described tag processes unit produces corresponding label information at the professional input direction of user side according to node port and the input label information of importing ethernet signal; At the network side input direction, the signal of importing is carried out the label analysis, carry out label reduction or lift-off processing;

Described label routing unit is according to the Label Forwarding Information Base of node, to service signal according to label information integrate, scheduling and distribution processor.

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