CN1832444A - End-to-end processing method and device for Ethernet service in city local network - Google Patents

Abstract

This invention relates to a method and a device for processing end to end Ethernet service in a MAN, in which, said method includes: setting the corresponding label of a node port connecting the MAN and external networks, when a service signal of an external network is input, a corresponding label is added or a self-carried label is transformed to the input service signal based on the input node port and the label information to route, accumulate and distribute the service signals in the MAN based on the labels and the output port of the network strips or transforms the added label information to recover the original input service signal, the device includes: an interface process unit, a label process unit and a label route unit.

Description

The end-to-end processing method of Ethernet service and device in the MAN

Technical field

The present invention relates to MAN, refer to the end-to-end processing method and the device of Ethernet service in a kind of MAN especially.

Background technology

Along with IP and development of internet technology, network user's number increases rapidly and the enriching constantly of broadband services, operator is for the user can provide that web browses, online transaction, movie ﹠ TV download, ip voice, Video/Audio stream, business such as VoD, multimedia interactive, video conference, long-distance education, VPN, Leased line, these business impel bearer network to follow corresponding development.

The bearer network aspect, along with the lifting significantly of backbone network and Access Network capacity and progressively perfect, and deep variation is also taking place in the metropolitan area network business main body, a large amount of service traffics all concentrate on the metropolitan area scope, along with the development of IP technology and network IPization, at present increasing user and operator adopt a large amount of oarse-grained GE passages to realize that wideband data is interconnected.Operation Network turns to metropolitan area network from backbone network, and wherein the ether technology has become networking technology main in the metropolitan area network, and the transmission that how to solve a large amount of bulky grain ether business is that the metropolitan area transmits the problem that net needs emphasis to consider.

The technical scheme of prior art one:

In MAN, mainly adopt the interconnected networking of Layer 2 switch, MSTP (multiple service platform) and Metro WDM (wavelength division multiplexing) interconnection Access Layer and core layer network at present.

For the situation of the interconnected networking of Layer 2 switch,, realize converging and transmitting of Ethernet service by the searching and transmitting of MAC (medium access control) address as metropolitan area network.

Two layers of exchange based on the study and the forwarding of MAC Address are handled are subject to the restriction of switch mac address table size, can't realize isolation professional between the port simultaneously.For example in the bearer network, the Ether frame that each access layer equipment that normal Business Stream is the downstream is uploaded all sends to the core layer node by convergence-level, if adopt two layers of exchanged form, then can pass through convergence-level node direct communication networking between each access layer equipment in downstream, operator can't manage whole network.

Two layers of exchange that employing is handled based on the study and the forwarding of MAC Address if the Ether frame that receives can not find output port, will be broadcasted to other all of the port except that the source port that receives.When the network size increase that Layer 2 switch is set up, this network that is broadcast to causes very big load, and influence is to the performance of other Business Processing.Therefore, the ethernet standard tissue has been introduced the definition of VLAN (VLAN), and big local area network (LAN) is divided into a plurality of less VLANs.For the message and the broadcasting packet of unknown destination address, be only limited in broadcasting in the same VLAN, can not be broadcast in the whole local area network.

The introducing of VLAN can reduce the cost that moves and change, when a network when a position moves to another position, his network attribute does not need to reconfigure, just can access network; Have the fail safe that VLAN isolates, disposed VLAN after, the packet of a VLAN can not send to another VLAN, like this, just can not receive the packet of any this VLAN on the user's of other VLAN the network, has realized maintaining secrecy of information.

The frame format of VLAN frame is ethernet frame adds 4 bytes in the source MAC back a vlan domain.The 802.1Q tag head of these 4 bytes has comprised the tag protocol identifier (TPID--TagProtocol Identifier, its value is 8100) of 2 bytes and the tag control information TCI (TCI--TagControl Information) of two bytes.The TCI zone comprises the VLAN label value (VLAN ID) of 12-bit.The VLAN ID of 12-bit has 4096 values, wherein 12-bit be complete 0 and complete 1 (promptly 0 and 4095) two values be retention.Other 4094 VLAN ID (1～4094) value can be used for the user.

The front is mentioned, and uses VLAN can limit broadcasting packet, realizes that the safety between the user is isolated.Therefore, in a network environment, need plan, prevent the VLAN conflict between the different users VLAN.This planning is handled in network size hour, realizes easily.When network size constantly enlarges, more and more when number of users increases gradually to the requirement of VLAN, and user's request is unpredictable, and it is difficult that the planning of VLAN becomes.Therefore VLAN and face the not enough embarrassment of resource equally based on two layers of exchange of MAC Address.

The shortcoming of prior art one:

When 1, the interconnected formation metropolitan area network of Layer 2 switch carried a large amount of Ethernet services, Layer 2 switch had limited layer 2-switched range of application based on the treatment mechanism of MAC address learning and forwarding, can not make up big metropolitan area network with Layer 2 switch;

2, Layer 2 switch is set up the mode that metropolitan area network adopts fiber direct connection, the metropolitan area network complex structure, and the fiber direct connection mode is huge to the fiber resource demand, may not provide enough fiber resources in some network application;

3, Layer 2 switch establishment metropolitan area network lacks protection mechanism, and the required SLA of metropolitan area network (SLA) can't be provided;

4, Layer 2 switch adopts study and the forwarding mechanism based on MAC, can't realize that the business between each access device of same one-level below the Layer 2 switch is isolated, and lacks fail safe and guarantees;

5, adopt vlan technology, need whole net unified management, realize difficulty, and resource-constrained.

The technical scheme of prior art two:

Adopt MSTP, introducing Layer 2 switch system for Ethernet service carries out converging of Ethernet service and restrains, the Link Access Procedure on SDH) etc. (Link Access Procedure SDH: encapsulation process is mapped in SDH (SDH (Synchronous Digital Hierarchy)) virtual container by GFP (general frame forming processing), LAPS again, employing interleaves that multiplexing mode forms STM-16, the STM-64 frame signal is transmitted in MAN, converge to the core layer network by the centre junction point and handle.

The shortcoming of prior art two:

1, the circuit of MSTP is handled based on traditional SDH/SONET (SDH (Synchronous Digital Hierarchy)/Synchronous Optical Network) technology, the 2.5Gbps/10Gbps transmission bandwidth can only be provided, the access layer network Ethernet interface provides GE (gigabit Ethernet), FE (Fast Ethernet) interface at present, and MSTP can't provide Access Network required big capacity bandwidth;

2, in the MSTP bearing system, introduce the mechanism of two layers of exchange for Ethernet service Ethernet service is handled, there is the same problem that is subject to the MAC Address space with the Layer 2 switch networking;

3, exist the same business between the different downlink ports of can't accomplishing to isolate with prior art one, lack fail safe and guarantee.

The technical scheme of prior art three:

Utilize Metro WDM system bearing Ethernet service, mainly contain several modes:

(1) utilizes the wavelength resource of WDM, Ethernet service of each wavelength carrying, each wavelength is used for Ethernet service for example GE or FE between interconnected Access Network and the core net as a pipeline, utilize wave division multiplex mode that a plurality of wavelength are converged again, the multi-wavelength signals of generation is with a bearing optical fiber;

(2) utilize the existing chip technology, converge in the jumbo wavelength pipeline a plurality of Ethernet services are transparent, for example adopt chip technology with in the professional transparent wavelength that converges to a 2.5Gbps bandwidth of two GE, utilize wavelength-division multiplex technique that a plurality of wavelength are converged in the optical fiber then and transmit.

The shortcoming of prior art three: to GE and FE signal transparent transmission, serious waste line bandwidth; And in metropolitan area network, the line bandwidth cost accounts for significant proportion.

Summary of the invention

The invention provides the end-to-end processing method and the device of Ethernet service in a kind of MAN, in order to solve in the prior art service signal is existed MAC Address and traditional not enough problem of VLAN label based on two layers of exchange, the security guarantee that service port isolates mutually can be provided simultaneously and improve network bandwidth utilance.

One of end-to-end processing method of Ethernet service in the MAN provided by the invention comprises: set the pairing label of node port that MAN is connected with external network, when the service signal of external network is imported, carry out 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.

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.

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.

According to said method of the present invention, each network node also stores 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.

Among the described step B12,, also comprise step with this a plurality of business integrations to a transmission channel if when a plurality of business that have different label informations match same forwarding port.

In the MAN provided by the invention two of the end-to-end processing method of Ethernet service, comprising: set the pairing label of node port that MAN is connected with external network, when the service signal input of external network, 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.

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.

Label information with input node port correspondence described in the steps A 2 adds in the described service signal frame, 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.

According to said method of the present invention, each network node also stores 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.

Among the described step B22,, also comprise step with this a plurality of business integrations to a transmission channel if when a plurality of business that have different label informations match same forwarding port.

In the MAN provided by the invention three of the end-to-end processing method of Ethernet service, 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.

According to said method of the present invention, 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.

In the label conversion table of described port that is connected with external network and input label,, then different switch labels is set respectively for dissimilar service signal from this port input if same port has a plurality of dissimilar service signals inputs.

According to said method of the present invention, each network node also stores 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.

Among the described step B32,, also comprise step with this a plurality of business integrations to a transmission channel if when a plurality of business that have different label informations match same forwarding port.

The present invention provides the end-to-end processing unit of Ethernet service in a kind of MAN in addition, 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.

The beneficial effect that technical solution of the present invention is brought is as follows:

1, the present invention avoid using based on MAC Address search and transmit the statistic multiplexing that could realize Ethernet service, it is limited and use the complexity of searching and transmit processing of mac address table and to the decline of service feature to have solved mac address table;

3, the present invention is enclosed within the label that uses in the metropolitan area network by setting up one, and service signal is handled based on this label, needn't be subject to the 4K restriction of ethernet vlan label, not need operator that a plurality of Access Network VLAN of metropolitan area guipure are carried out unified planning simultaneously;

4, adopt the inventive method, same other port of level is not because label can conflict, and like this, the next business of customer network can not be forwarded in another customer network and go, and has realized professional isolation;

5, the present invention can be transmitted the client's business integration from different port in same transmission channel, has improved bandwidth availability ratio simultaneously.

Description of drawings

Fig. 1 is end-to-end processing method one flow chart of Ethernet service in the MAN provided by the invention;

Fig. 2 is that the inventive method one is added the label schematic diagram;

Fig. 3 is end-to-end processing method two flow charts of Ethernet service in the MAN provided by the invention;

Fig. 4 is that the inventive method two node labels are transmitted schematic diagram;

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

Fig. 6 is the inventive method three node labels conversion schematic diagram;

Fig. 7 is apparatus of the present invention structural representation.

Embodiment

The invention provides the end-to-end processing method one of Ethernet service in a kind of MAN, referring to Fig. 1, this method comprises:

Based on node+port assignment label:, unifiedly service signal is added one deck label according to node+port information no matter whether business has label information; Each node identification tag information in MAN inside, according to label to Packet Service converge, scheduling and distribution processor.At MAN output port place, peel off the label information that transmission network adds.The label that input port adds is by the unified regulation of MAN, each input and output node is all kept a node+port and label distribution mapping table in the network, according to node+port assignment label resources, can change the length of label area flexibly according to the size of network size.This processing owing to be that MAN is effectively inner, by the metropolitan area network internal control, needn't be subject to the number restriction of VLAN label with respect to traditional VLAN tag processes, can shield different clients simultaneously because each self planning causes the situation of VLAN label collision.

Concrete label distribution method in the private line service network application, all distributes a unique label at the input port of each node for the Ether frame of input as shown in Figure 2, shown in following table one:

Table one:

Port numbers	Label
		P11	V1
P12	V2
		P13	V3
P21	V4
		P22	V5
P31	V6
		P41	V7
P42	V8

I.e. N1 node ports having P11, P12 and P13 among the figure, corresponding distributed labels is V1, V2 and V3; N2 node ports having P21 and P22, corresponding distributed labels is V4 and V5; N3 node ports having P31, corresponding distributed labels is V6; N4 node ports having P41 and P42, corresponding distributed labels is V7 and V8; And each incoming frame business all encapsulated distributed labels, at a network internal identification tag information, the tagged traffic stream of a plurality of same routes can be converged in the physical pipeline, be transferred to destination node by this physical pipeline, a plurality of Business Streams are separated according to label information from the output port of destination node, and business is peeled away at output port.

Fig. 3 is end-to-end processing method two flow charts of Ethernet service in the MAN provided by the invention, and this method is specially:

For the Packet Service signal of each port input, if service signal from tape label, is not then handled service signal; If service signal does not have label information, then according to node+port information, be unified label of Packet Service signal allocation from this port input, the metropolitan area network distributed labels can with the label unified planning that carries of input Packet Service, also can adopt with professional from the diverse another kind of tag system of tape label, in metropolitan area network inside this two covers label is distinguished, and between network node, carried out the converging of service signal, scheduling and distribution processor according to the label information that each service signal carries.At the MAN output port, according to the label that adds and the corresponding relation of node+port, peel off the label information that adds by MAN, the label for customer service carries remains unchanged.

Network node to the concrete mode of the converging of service signal, scheduling and distribution processor as shown in Figure 4, be a kind of convergent type business model, the business of node C, D, E and F all converges to node A, Tag1-Tag8 among the figure is the label that MAN is distributed to corresponding port, suppose that C, D, E and F node all have four ports, be respectively port one, 2,3 and port 4, port one wherein and port 2 are the input port of external network, and port 3 and port 4 are the transmit port of network internal.All converge to node A in order to make from the service signal of the input of node C, D, E and F, all dispose a Label Forwarding Information Base at each node, the corresponding relation of regulation label and this node port, show the port member that all labels of this intranodal comprise, according to this Label Forwarding Information Base, realize converging, distributing and integrating based on the service signal of label information.With the F node is example, its Label Forwarding Information Base such as following table two:

Table two:

Label	Port	Port
			Tag1	Port one	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 last table, the corresponding port one and 3 of Tag1 label shows just directly to be forwarded to port 3 outputs when port one receives the frame that contains the Tag1 label information; Receive Tag1 label frame from port 3 conversely and directly be forwarded to port one; In like manner, the Tag3 label is corresponding to port 3 and 4, and expression directly is forwarded to port 3 when port 4 receives the frame of Tag3 label information; Like this,, all be forwarded to port 3 outputs, have identical route, can be incorporated in the transmission channel and transmit, reduce the transmission bandwidth that takies from port one, 2,4 label frame for the F node.

Said method can be handled the business-level littler than port for service signal, if comprise the service signal of a plurality of different labels in port, can carry out different processing respectively to each tagged traffic signal, realize professional end-to-end processing in the rank littler, improved the bandwidth availability ratio that transmits net than port.

Fig. 5 is end-to-end processing method three flow charts of Ethernet service in the MAN provided by the invention, and this method comprises:

For no label frame input signal, based on node+port assignment label; For tape label frame input signal,, business is converted to the respective labels of transmission network definition from tape label according to input node port and input label information in the label translation-protocol table.A label translation-protocol of each node maintenance table in the MAN.The node of label translation-protocol table stored network, port, original tag sign (whether having label), original tag value (business carries label information) and transmission network are based on node+port and original tag value distributed labels (new label).Label translation-protocol sheet format is shown in following table three.

Table three:

Nodal scheme	The port label	The original tag sign	Original tag	New label
					N1	P11、P12、...P1m	1: the expression Packet Service is from tape label; 0: the expression Packet Service does not have label	VLAN ID (for tag identifier is 0 situation, and this zone is empty)	Labe11j(j＝1～m)
N2	P21、P22、...、 P2n	1/0	VLAN ID	Labe12j(j＝1～n)
					...
Ni	Pi1、Pi2、...、 PiL	1/0	VLAN ID	Labe1ij(j＝1～L)

The new label information that produces at MAN internal condition label protocol conversion table carries out professional integration, converges and distribution processor, at the new label information of output port basis, parse the information such as original tag, node and port of service signal, the reduction original tag is perhaps directly exported new label peeling from network.This method synthesis the processing of the two kinds of methods in front, be suitable for various types of Business Processing.

Fig. 6 is a concrete label transform instances.As shown in Figure 6,6 WDM looped networks that node constitutes have been provided among the figure, label shines upon the Service Processing Unit each node, (the wavelength division multiplexing unit comprises the multiplexing process to a plurality of GE business also to comprise a WDM wavelength division multiplexing unit except comprising, and the wavelength division multiplexing that wavelength is carried out is handled), label can be shone upon Service Processing Unit and be integrated in the wdm system.Provided the Business Stream that each port of node D sends to other node among the figure.In node D, port P1 incoming traffic has comprised three kinds of label V1, V2, V3, and port P2 incoming traffic comprises two kinds of label V4, V7, and port P4 incoming traffic comprises two kinds of label V6, V9, and port P3 and port P5 service signal be tape label not.Provided the route of all kinds business in network of this node input among the figure.Therefore the relation table that can set up a node, port, label conversion at node D is shown in following table four:

Table four:

Node number	Port numbers	The original tag mark	The original tag value	New label
					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 input port adds/convert to new label information to all kinds of business,, handle respectively according to the route of all kinds of business in network.Wherein label T1, T4, T7 corresponding service transmission destination all are node A, label T2 corresponding service transmission destination is node C simultaneously, and the bandwidth summation of three kinds of traffic assignments is no more than GE, therefore this 4 class business all can be incorporated among the GE, in wdm system, can carry out multiplexing process to a plurality of GE, be multiplexed in a 2.5Gbps and the higher rate wavelength.Label T3 corresponding service transmission destination is node E, label T5 corresponding service transmission destination is node F, two class business can be incorporated among the GE, similarly, among 3 class business integration to a GE with label T6, T8, T9 correspondence, a plurality of GE are multiplexed in the wavelength of a higher rate, carry by the WDM looped network in the mode of wavelength.When arriving each destination node,, isolate a plurality of labels that in same GE passage, transmit according to the label information that all kinds of business are carried.For purpose is not the tagged traffic of this node, continues to be transferred to next node after handling accordingly, and the tagged traffic for downloading at this node then restores original tag according to label mapping relations table, or peeling label, exports to the user.

According to the end-to-end processing method of Ethernet service in above-mentioned three kinds of metropolitan area networks provided by the invention, the present invention provides a kind of corresponding realization device in addition.

The end-to-end processing unit of Ethernet service in the metropolitan area network provided by the invention as shown in Figure 7, mainly comprises interface processing unit, tag processes unit, label routing unit three parts.Wherein the interface processing unit is responsible for the ethernet signal of input and output is carried out the processing of PHY (physical layer), MAC (medium access control) layer.The tag processes unit carries out node, port, label analysis at the professional input direction of user side to ethernet signal, according to label and node port mapping table, produces in the service signal frame that corresponding label information joins input; At the network side input direction, the signal of importing is carried out the label analysis, according to label and node port mapping table, carry out label reduction or lift-off processing.The information that the label routing unit is transmitted according to node label is carried out business integration to the service signal of different labels, based on label information to service signal dispatch, processing such as distribution.

Obviously, those skilled in the art can carry out various changes and modification to the present invention and not break away from the spirit and scope of the present invention.Like this, if of the present invention these are revised and modification belongs within the scope of claim of the present invention and equivalent technologies thereof, then the present invention also is intended to comprise these changes and modification interior.

Claims (16)

1, the end-to-end processing method of Ethernet service in a kind of MAN is characterized in that, sets the pairing label of node port that MAN is connected with external network, when the service signal of external network is imported, carries out 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 also stores 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 a kind of MAN is characterized in that, sets the pairing label of node port that MAN is connected with external network, when the service signal of external network is imported, carries out 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 frame, 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 also stores 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 a kind of 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 also stores 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 in a kind of MAN is characterized in that 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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