CN101155130A

CN101155130A - Method for learning MAC address and system and equipment for conveying VPLS client data

Info

Publication number: CN101155130A
Application number: CNA2006101407330A
Authority: CN
Inventors: 资小兵; 钟其文; 符邦秋
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2006-09-30
Filing date: 2006-09-30
Publication date: 2008-04-02
Anticipated expiration: 2026-09-30
Also published as: CN101155130B

Abstract

The invention discloses a method of studying MAC address. A root network device issues data message to leaf PE, wherein the said data message at least comprises customer data and a label for marking the VPLS of the customer data and entry PE. The said customer data at least has customer source MAC address. The leaf PE obtains the VPLS and entry PE based on the label in the data message. When the leaf PE is not the entry PE, and CE connected with the leaf PE belongs to the said VPLS, the leaf PE obtains a phantom line to the entry PE, and the mapping relation between the said phantom line and customer source MAC address is stored. The invention also provides a system and device for transmitting the VPLS customer data. When the VPLS customer data is transmitted using multicast tree, MAC address studying is performed on the leaf PE, and the customer border device is ensured not to receive two same customer data packages.

Description

The system and the equipment of the method for study MAC Address and transmission VPLS customer data

Technical field

The present invention relates to networking technology area, particularly the system and the equipment of the method for study MAC Address and transmission VPLS customer data.

Background technology

VPLS (Virtual Private LAN Service, the virtual special local area network service) provides the two-layer virtual private network L2VPN business of a kind of point to multiple spot, make the user site of isolating on the region can be by wide area network WAN or/and metropolitan area network MAN connects, and the connection effect that makes each website is as in a local area network (LAN) LAN.

Each client boundary equipment CE of same VPLS network is connected by ISP's network, and ISP's network is made up of a plurality of ISP's network-internal apparatus P and ISP's network boundary equipment PE.The VPLS network connects as shown in Figure 1, mainly by following assembly:

Place in circuit: CE equipment is connected on ISP's network boundary equipment PE by place in circuit;

Pseudo-line: pseudo-line is the contact between PE, to each VPLS, virtual each PE equipment that participates in this VPLS that is connected to of pseudo-line of full mesh can be arranged all;

The tunnel: pseudo-line uses the tunnel to come transport service, and same tunnel can be used by many pseudo-lines.Usually tunneling technique need use the encapsulation that comprises a demodulation multiplexer, this demodulation multiplexer is used MPLS (Multi-Protocol Label Switching usually, multiprotocol label switching) identifies, it is pseudo line tag, be used for discerning a pseudo-line, the process of setting up pseudo-line is exactly the process of distributing the MPLS label for pseudo-line.

For each VPLS, outlet PE distributes a tag block for all entry PE, wherein the corresponding entry PE of each label.When entry PE by the tunnel when certain outlet PE is transmitted the customer data of this VPLS, use this outlet PE to encapsulate customer data for its distributed labels, promptly encapsulate a MPLS head to customer data, form a MPLS bag, send to this outlet PE by the tunnel then.

As shown in Figure 2, suppose for certain VPLS, be designated VPLS 100, in this VPLS network PE1 is arranged, PE2, three network equipments of PE3, PW1.2 represents the pseudo-line that is connected between PE1 and the PE2, PW1.3 represents the pseudo-line that is connected between PE1 and the PE3, PW2.3 represents the pseudo-line that is connected between PE2 and the PE3, PE1 as outlet is as the PE2 that enters the mouth, PE3 has distributed the label 1002 that identifies pseudo-line PW1.2,1003 of PW1.3, PE2 as outlet is as the PE1 that enters the mouth, PE3 has distributed label 2001,2003, be as the PE1 that enters the mouth as the PE3 that exports, PE2 has distributed label 3001,3002.PE1, PE2, PE3 have stored the pseudo line tag information of self, and the pseudo line tag information of PE1 self is as shown in table 1, divide two parts, and a part is the label as outlet PE 1, and a part is the label as entry PE 1.PE1 receives CE and goes up the customer data of sending out, at least contain client's source MAC in the customer data, the user in the customer rs site that this address is with this CE is connected or the address of router, customer data is that this user or router are by being dealt into CE on the customer rs site, when PE1 need be when PE2 transmits customer data, earlier label 2001 is encapsulated into customer data as the MPLS head, wrap as a MPLS with customer data, send to PE2 by the tunnel then, after PE2 receives data message, according to self the pseudo line tag information that prestores, know that label 2001 belongs to VPLS 100, thereby be forwarded to corresponding C E, and learn that pseudo-line PW1.2 can arrive MAC1 address in source in the customer data, with the mapping relations of PW1.2 and MAC1 address, source record and be kept in the mac address table of PE2, as shown in table 2, later on PE2 receives the customer data that the CE that belongs to VPLS 100 issues, and the destination address that receives these data is just known by pseudo-line PW1.2 when being MAC1 and transmitted.

Port	VPLS		Label	PE
Port	VPLS		Label	PE	PW1.2	Outlet	VPLS 100	1002	PE2
PW1.3	1003	PE3			PW1.2			1002	PE2
PW1.3	1003	PE3	PW1.2	Inlet	VPLS 100			2001	PE2
PW1.3	3001	PE3	PW1.2					2001	PE2

Table 1, pseudo line tag information

VPLS	MAC Address	Port
VPLS	MAC Address	Port	VPLS 100	MAC1	PW1.2

Table 2, mac address table

When transmitting in the VPLS network multicast or broadcast traffic by different pseudo-lines, bandwidth utilization is not high, this is because the tunnel that different pseudo-lines uses has superposed part on physical link, working as same customer data like this is sent on each outlet PE by different pseudo-lines, on the physical link of intersection, need to transmit the customer data of repetition, so bandwidth utilization is not high.

Can utilize multicast distribution tree to transmit the VPLS flux of multicast in the prior art.Multicast tree is distributed a Label space by tree root, and is as shown in table 3, corresponding VPLS of each label in this Label space, and Label space is sent to each leaf PE.CE will be dealt into user or router in the customer rs site that CE is connected on the customer data, be dealt into entry PE on the CE, entry PE can know by interface circuit which VPLS this CE belongs to, when using this multicast tree to transmit certain VPLS flow, earlier the label of this VPLS of sign being encapsulated into the customer data head forms data and wraps and be dealt into tree root, tree root mails to each leaf PE to this packet again, therefore when leaf PE when tree root is received packet, can know VPLS under the customer data according to the Label space of the label that encapsulates in the packet and this tree tree root, thereby customer data is forwarded to the CE that belongs to this VPLS.For example, PE1 receives the customer data that corresponding CE sends, judge that by interface this CE belongs to VPLS 100, label 200 is encapsulated into customer data sends to tree root, tree root is forwarded to each leaf PE with this packet, leaf PE finds the VPLS of this label correspondence to be designated VPLS 100 in the Label space information that prestores, and judges that by interface circuit which CE belongs to VPLS100, customer data is issued to the CE that belongs to this VPLS100.

VPLS	Label
VPLS	Label	VPLS 100	200
VPLS 101	201	VPLS 100	200
VPLS 101	201	VPLS 102	202

Tree root distributed labels spatial information in table 3, the prior art

Prior art has following shortcoming:

1, in existing VPLS business, all can set up the pseudo-line that whole network connects among VPLS usually, multicast tree is fit to be used for transmitting multicast or the broadcast traffic among the VPLS, and unicast traffic still should pass by the pseudo-line of wall scroll as far as possible.The label of said method from packet can only obtain the VPLS under the customer data, the sign that does not have entry PE, therefore outlet PE can not be carried out MAC address learning when the flow of receiving from multicast tree, can not get access to the pseudo-line of the affiliated entry PE of client's source MAC, can cause all VPLS flows all to use the multicast tree transmission like this, and can not use pseudo-line to transmit.For example, transmit the flow of certain VPLS with multicast tree, mac address table during beginning on the leaf PE is empty, because leaf PE can not carry out MAC address learning when receiving the VPLS flow, mac address table is empty always, therefore all VPLS flows all must transmit by multicast tree, and can not transmit by pseudo-line, can the flow of clean culture being sent on the unwanted leaf PE so always, leaf PE transmits customer data to corresponding C E, wasted bandwidth resources, also increased the weight of leaf PE and must handle burden.

When 2, using multicast tree to transmit the VPLS flow, when leaf PE is entry PE, can receive the data message that tree root sends over, because do not identify the information of entry PE in the data message, entry PE does not know it is the own customer data of sending out on tree root, also can transmit to corresponding C E, like this, go up the CE that sends out this customer data and can receive two parts of the same customer datas, it is the customer data that the customer data sent out on the customer rs site and multicast tree root issue, the burden of CE can be increased the weight of, and the mistake of upper layer application may be caused.

Summary of the invention

In view of this, main purpose of the present invention provides the method for study MAC Address and reaches system and the equipment that transmits the VPLS customer data, when utilizing multicast tree to transmit the VPLS customer data, on leaf PE, realize MAC address learning, and guarantee that CE can not receive two parts of identical customer data bags.

For solving the problems of the technologies described above, the objective of the invention is to be achieved through the following technical solutions:

A kind of method of learning MAC Address, this method comprises:

The tree root network equipment is handed down to leaf PE with data message;

Wherein, described data message comprises customer data at least and identifies the affiliated VPLS of described customer data and the label of entry PE;

Wherein, described customer data comprises client's source MAC at least;

Leaf PE obtains VPLS and entry PE according to the label in the described data message, when leaf PE is not an entry PE, and when the CE that is connected with leaf PE belonged to described VPLS, leaf PE got access to the pseudo-line of entry PE, preserved the mapping relations of described pseudo-line and client's source MAC.

Preferably, this method also comprises:

Tree root network equipments configuration Label space information is issued to this Label space information need the use multicast tree to transmit the entry PE and the leaf PE of the customer data of described VPLS, and preserves described Label space information;

Wherein, described Label space information comprises that at least the described multicast tree of sign VPLS and needs use transmits the label of entry PE of the customer data of described VPLS.

Preferably, described customer data also comprises target MAC (Media Access Control) address;

This method also comprises:

A11, entry PE receive client boundary equipment CE and go up the customer data of sending out that has client's source MAC and target MAC (Media Access Control) address;

A12, entry PE are obtained the VPLS under the CE, obtain the label of described VPLS of sign and entry PE in the Label space information that prestores, label is encapsulated into customer data forms data message, on be dealt into the tree root network equipment.

Preferably, after steps A 11, this method also comprises: entry PE searches whether there is target MAC (Media Access Control) address in the mapping relations of MAC Address that prestores and pseudo-line, if there is no, and execution in step A12; If exist, be determined to the pseudo-line of target MAC (Media Access Control) address correspondence, and determine corresponding outlet PE according to described pseudo-line, obtain the pseudo line tag of described pseudo-line of sign and entry PE by described pseudo-line, described pseudo line tag is encapsulated into customer data forms data message, and send to outlet PE, outlet PE gets access to the pseudo-line of entry PE according to described pseudo line tag, preserve the mapping relations of described pseudo-line and client's source MAC, process ends.

Preferably, steps A 12 also comprises: entry PE is transmitted customer data according to the VPLS that obtains to the CE that belongs to described VPLS except that the CE that sends customer data;

When leaf PE was not entry PE, this method also comprised:

Leaf PE transmits customer data according to the VPLS that label identified to the CE that belongs to described VPLS.

Preferably, the described tree root network equipment is an entry PE; Described customer data also comprises target MAC (Media Access Control) address;

This method also comprises:

A21, entry PE receive client boundary equipment CE and go up the customer data of sending out that has client's source MAC and target MAC (Media Access Control) address;

A22, entry PE are obtained the VPLS under the CE, obtain the label of described VPLS of sign and entry PE in the Label space information that prestores, and label is encapsulated into customer data forms data message.

Preferably, this method also comprises:

After steps A 21, this method also comprises: entry PE searches whether there is target MAC (Media Access Control) address in the mapping relations of MAC Address that prestores and pseudo-line, if there is no, and execution in step A22; If exist, be determined to the pseudo-line of target MAC (Media Access Control) address correspondence, and determine corresponding outlet PE according to described pseudo-line, obtain the pseudo line tag of described pseudo-line of sign and entry PE by described pseudo-line, described pseudo line tag is encapsulated into customer data forms data message, and send to outlet PE, outlet PE gets access to the pseudo-line of entry PE according to described pseudo line tag, preserve the mapping relations of described pseudo-line and client's source MAC, process ends.

Preferably, steps A 22 also comprises: entry PE is transmitted customer data according to the VPLS that obtains to the CE that belongs to described VPLS except that the CE that sends customer data;

After leaf PE obtained the sign of VPLS and entry PE according to the label in the data message, this method also comprised:

Leaf PE transmits customer data to the CE that belongs to described VPLS.

A kind of ISP's network boundary equipment, this equipment comprises: the Label space memory cell, the MAC address learning unit, the data message receiving element, wherein,

The Label space memory cell is used to preserve the sign VPLS of tree root network equipment transmission and uses multicast tree to transmit the label of the entry PE of described VPLS customer data;

The data message receiving element is used to receive the data message that the tree root network equipment sends, and wherein, described data message comprises customer data at least and identifies the label of described VPLS and entry PE; Wherein, described customer data comprises client's source MAC at least;

The MAC address learning unit, be used for obtaining the label of data message from the data message receiving element, from the Label space memory cell, obtain described VPLS and entry PE according to described label, when ISP's network boundary equipment is not entry PE, and when the CE that is connected with described ISP's network boundary equipment belongs to described VPLS, get access to the pseudo-line of entry PE, preserve the mapping relations of the client's source MAC in described pseudo-line and the data message.

Preferably, this equipment also comprises:

The customer data transmitting element is used for obtaining the data message of data message receiving element, obtains the VPLS that label identified the data message from the Label space memory cell, transmits customer data to the CE that belongs to described VPLS.

A kind of system that transmits the VPLS customer data, this system comprise the multicast tree root network equipment, and at least one multicast leaf PE, at least one CE, the data message of the described multicast tree root network equipment be from entry PE, wherein,

The multicast tree root network equipment is used for configuration identifier VPLS and needs and uses multicast tree to transmit the Label space information of the entry PE of described VPLS customer data, and described Label space information is issued to entry PE and multicast leaf PE; Data message is handed down to multicast leaf PE, and wherein, described data message comprises customer data and identifies the affiliated VPLS of described customer data and the label of entry PE that described customer data comprises client's source MAC at least at least;

Multicast leaf PE, be used to preserve Label space information, according to the label in the data message, from Label space information, obtain described VPLS and entry PE, when multicast leaf PE is not an entry PE, and when the CE that is connected with described multicast leaf PE belongs to described VPLS, get access to the pseudo-line of entry PE, the mapping relations of preserving described pseudo-line and client's source MAC.

The present invention has following beneficial effect:

1, when using multicast tree to transmit the VPLS flow, tree root is handed down to leaf PE with data message, this data message comprises the label of customer data and sign VPLS and entry PE at least, customer data comprises source MAC at least, leaf PE obtains the sign of entry PE from the Label space that prestores according to label, carry out MAC address learning, record and preserve source MAC and in mac address table to the mapping relations of the pseudo-line of source MAC correspondence, later on this leaf PE receives that the CE of same VPLS sends and destination address when being the customer data of this MAC Address, just know with this puppet line and transmit this unicast traffic, and transmitted without multicast tree, therefore multicast leaf PE also need not transmit customer data to corresponding C E, avoid bandwidth to be taken in a large number like this, also reduced the processing burden of leaf PE;

2, use multicast tree to transmit the VPLS flow, when leaf PE is entry PE, can receive the data message that tree root sends over, the label that contains sign VPLS and entry PE in the data message, entry PE knows that this data message is to be dealt into multicast tree on oneself, can not transmit customer data to corresponding C E, like this, on send out this customer data CE can not receive this customer data bag.

Description of drawings

Fig. 1 is the VPLS network diagram;

Fig. 2 transmits schematic diagram for the VPLS customer data;

Fig. 3 is the flow chart of embodiment one provided by the invention;

Fig. 4 is the flow chart of embodiment two provided by the invention;

Fig. 5 is the structure chart of ISP's network boundary equipment provided by the invention;

Fig. 6 transmits the system diagram of VPLS customer data when not being PE in the multicast tree for entry PE;

Fig. 7 transmits the system diagram of VPLS customer data when being PE in the multicast tree for entry PE.

Embodiment

The present invention realizes a kind of method of learning MAC Address, and its core is: the tree root network equipment is handed down to leaf PE with data message; Wherein, described data message comprises customer data at least and identifies the affiliated VPLS of described customer data and the label of entry PE; Wherein, described customer data comprises client's source MAC at least; Leaf PE obtains VPLS and entry PE according to the label in the described data message, when leaf PE is not an entry PE, and when the CE that is connected with leaf PE belonged to described VPLS, leaf PE got access to the pseudo-line of entry PE, preserved the mapping relations of described pseudo-line and client's source MAC.Simultaneously, the present invention also provides system and the equipment that transmits the VPLS customer data, for making technical scheme of the present invention clearer, below develops simultaneously that the present invention is described in more detail for embodiment with reference to accompanying drawing.

In ISP's network, the tree root network equipment of multicast tree is set up Label space information, for each uses the entry PE distributing labels of this tree transmission VPLS flow, each tag identifier VPLS and use the information of the entry PE of the described VPLS flow of this tree transmission.If tree root is PE, tree root also can be own distributing labels.Tree root sends Label space information to use this tree transmission VPLS flow entry PE and leaf PE, and described entry PE and leaf PE preserve this Label space information, and be as shown in table 4.When sending Label space information to described entry PE and leaf PE, can transmit tree root by the mode that bgp protocol is issued automatically, be that the keeper is after tree root is distributed label for the entry PE of using this multicast tree delivery flow rate, utilize the update message of bgp protocol to issue this Label space information to the entry PE and the leaf PE that use this tree transmission VPLS flow, described then entry PE and leaf PE preserve this Label space information automatically, use this method to require tree root and described entry PE and leaf PE bgp peer each other.Also can use the mode of static configuration to transmit Label space information, be that the keeper is after tree root is distributed Label space information for the entry PE of using this multicast tree delivery flow rate, on entry PE and leaf PE,, do not influence realization of the present invention by disposing this Label space information manually.

VPLS	PE	Label
VPLS	PE	Label	VPLS 100	PE1	5001
PE2	5002			PE1	5001
PE2	5002	PE3		5003
VPLS 101	PE4	PE3		5003	5004
	PE4	PE1	5005		5004

Table 4, tree root distributed labels spatial information

Opening VPLS when professional, the pseudo-line that full mesh connects can be between all PE that participate in this VPLS, set up, and on these PE, pseudo line tag can be preserved, as shown in table 1.

(1) embodiment one

Below with reference to Fig. 3, introduce the implementation method of the embodiment of the invention one in detail, this method comprises:

Step 301, CE send the customer data that contains client's source MAC, target MAC (Media Access Control) address and IP bag to entry PE, entry PE promptly receives the PE of customer data from the CE that is attached thereto, the MAC Address sign be with customer rs site that CE is connected in the user or the address of router;

Step 302, entry PE judge whether target MAC (Media Access Control) address is unicast address, if, execution in step 303, if not, execution in step 308;

Step 303, entry PE judge by interface circuit whether the CE under the target MAC (Media Access Control) address is the CE that is connected with entry PE, if, execution in step 304; If not, execution in step 305;

Step 304, entry PE are transmitted customer data, process ends to this CE;

Step 305, entry PE search whether this target MAC (Media Access Control) address is arranged in the mac address table of storage, if having, and execution in step 306, if do not have, execution in step 308;

Step 306, from mac address table, get access to the pseudo-line of this target MAC (Media Access Control) address correspondence, pseudo line tag when in the pseudo line tag information of self preserving, obtaining this PE as inlet, pseudo line tag is encapsulated into customer data to be sent to outlet PE, for example, inlet is PE1, outlet is PE2, pseudo-line is PW1.2, obtaining the PW label from table 1 is 1002, and the head that PW label 1002 is encapsulated into customer data forms data message, and sends to outlet PE by the tunnel, if the tunnel between PE1 and PE2 is a strip label switching path LSP, the label of this LSP of sign is encapsulated into the head of this data message, sends to outlet PE, the data message form that send this moment is as shown in table 5;

Tunnel LSP label

PW label 1002

Source MAC

Purpose MAC1

The IP bag

The form of the data message of table 5, the encapsulation of use pseudo line tag

Step 307, outlet PE parse pseudo line tag from the data message of receiving, in the pseudo line tag information of self preserving, obtain the VPLS that this pseudo line tag identifies, remove the label in the data message, transmit customer data, execution in step 314 to the CE that belongs to this VPLS;

Step 308, after entry PE is received the customer data that CE sends, obtain VPLS under the CE by the interface circuit that is connected with CE, in the Label space information that prestores, obtain the label of this VPLS of sign and entry PE, label is encapsulated into customer data forms a MPLS bag, and send to the tree root network equipment by the tunnel.If the tunnel is a strip label switching path LSP, the label that just will identify this LSP is encapsulated into the head of MPLS bag.Suppose that entry PE is the PE1 that belongs to VPLS 100, obtaining this label from table 4 is 5001, and the form of the data message of this moment is as shown in table 6, transmits customer data to other CE that belong to this VPLS except that the CE that sends customer data simultaneously;

Tunnel LSP label

Tree root distributed labels 5001

Source MAC

Purpose MAC1

The IP bag

The form of the data message of table 6, the encapsulation of use tree root distributed labels

This step also can use other method to realize the forwarding of MPLS bag, for example, the purpose IP address of tree root can be encapsulated into the head of MPLS bag, so just can be forwarded to tree root to data from entry PE;

After step 309, the tree root network equipment are received this MPLS bag, this MPLS bag is issued to each leaf PE by the tunnel;

Step 310, leaf PE receive the label of checking after MPLS wraps in the MPLS bag, find the entry PE of this tag identifier in Label space information, judge whether it is that oneself goes up the data message of sending out, if, execution in step 311, if not, execution in step 312;

Step 311, leaf PE do not transmit customer data, process ends to CE;

Step 312, leaf PE obtain the VPLS of this tag identifier in the Label space information that prestores, and judge whether oneself belongs to this VPLS, if, execution in step 313, if not, execution in step 311;

Step 313, this moment, leaf PE became outlet PE, and outlet PE is removed label, transmits customer data to the CE that belongs to this VPLS;

Source MAC in step 314, the outlet PE study customer data, from Label space, obtain the entry PE that label identifies, in the pseudo line tag information of self preserving, get access to the pseudo-line of entry PE, this pseudo-line is the corresponding pseudo-line of source MAC, the mapping relations that write down and preserve this puppet line and source MAC in mac address table, the mac address table form is as shown in table 2.

In the present embodiment, tree root can be P or PE.

Wherein, the entry PE of step 301 can for leaf PE or do not belong to this multicast tree other need utilize the PE of this tree transmission VPLS flow;

Wherein, in the step 307, outlet PE can be tree root, and at this moment, tree root PE is according to receiving that the label in the data message is the PW label, promptly know it is to transmit customer data to corresponding CE, rather than, from the pseudo line tag information of self preserving, obtain the VPLS that this label identifies to multicast leaf PE forwarding data message, remove label, transmit customer data to the CE that belongs to this VPLS, execution in step 314 again.

Illustrate the implementation procedure of present embodiment below:

Tree root is on P1, PE1, PE2, PE3, PE4 are the leaf nodes of this tree, suppose in VPLS100, tree root is respectively PE1, PE2, PE3 has distributed label 5001,5002,5003, and in VPLS101, tree root is that PE4 has distributed label 5004, for PE1 has distributed label 5005, as shown in table 4, and this Label space information sent to each PE, each PE preserves this Label space information.

When PE1 when CE1 receives customer data, obtain CE1 by interface circuit and belong to VPLS 100, learn that from customer data destination address MAC1 is not a unicast address, in Label space information, find the label 5001 of sign VPLS 100 and PE1, label is encapsulated into the customer data head, form a MPLS bag, the MPLS bag is sent to tree root P1, simultaneously customer data is transmitted to the CE that belongs to VPLS 100 except that CE1.Tree root is handed down to leaf PE with the MPLS bag, leaf PE1, PE2, PE3, PE4 are after receiving the MPLS bag that tree root sends, check that label is 5001 among the MPLS, that obtain label 5001 correspondences from the Label space information that prestores is VPLS 100, PE2, PE3 just send customer data to the CE that belongs to VPLS100, PE4 from the interface circuit of CE learn that the CE that is connected with PE4 does not belong to VPLS100's, can not send customer data to CE, PE1 knows the customer data that oneself sends, and does not therefore need to be forwarded on the corresponding C E again.PE2 is at mac address table record and preserve the pseudo-line PW1.2 of source MAC in the corresponding customer data, PE3 is at mac address table record and preserve the pseudo-line PW1.3 of source MAC in the corresponding customer data, when next PE2 or PE3 receive the CE that belongs to VPLS100 go up send out and destination address when being the customer data of this MAC Address, just know and to have transmitted to PE1 by pseudo-line PW1.2, and need not transmit by multicast tree, therefore multicast leaf PE just can not receive data message, can not transmit to corresponding C E, avoid a large amount of wastes of bandwidth like this, alleviated the burden of leaf PE.

(2) embodiment two

Tree root is as entry PE, and promptly tree root PE receives customer data from CE, and realize that the present invention needs following steps this moment:

Step 401-step 406 is identical with step 301-step 306 among the embodiment one;

Step 407, outlet PE are obtained the VPLS sign according to pseudo line tag from the pseudo line tag information that prestores, remove label, transmit customer data, execution in step 413 to the CE that belongs to this VPLS;

Step 408: after tree root PE receives the customer data of CE transmission, obtain VPLS under the CE by the interface circuit that is connected with CE, in the Label space information that prestores, obtain the label of sign VPLS and tree root PE, label is encapsulated into customer data forms a MPLS bag, and send to tree root by the tunnel, simultaneously to other CE forwarding customer datas that belong to this VPLS that remove the CE that sends customer data;

Step 409, tree root PE are handed down to each leaf PE with the MPLS bag by the tunnel;

Step 410, leaf PE obtain the VPLS of this tag identifier in the Label space information that prestores, judge whether oneself belongs to this VPLS, if not, and execution in step 411, if, execution in step 412;

Step 411, leaf PE do not transmit customer data, process ends to CE;

Step 412, this moment, leaf PE became outlet PE, and outlet PE is removed label, transmits customer data to the CE that belongs to this VPLS;

Source MAC in step 413, the outlet PE study customer data, from Label space information, obtain the tree root PE that this label identifies, in the pseudo line tag information of self preserving, get access to the pseudo-line of tree root PE, this pseudo-line is the corresponding pseudo-line of source MAC, the mapping relations that write down and preserve this puppet line and source MAC in mac address table, the mac address table form is as shown in table 2.

A kind of ISP's network boundary equipment, promptly leaf PE comprises as outlet PE: Label space memory cell 501, data message receiving element 502, MAC address learning unit 503, customer data transmitting element 504, wherein,

Label space memory cell 501 is used to store the sign VPLS of tree root network equipment transmission and the label that this multicast tree of needs use is transmitted the entry PE of described VPLS customer data;

Data message receiving element 502 is used to receive the data message that the tree root network equipment sends, and wherein, data message comprises customer data and identify the label of described VPLS and entry PE that wherein, customer data comprises client's source MAC at least at least;

MAC address learning unit 503, be used for obtaining the label of data message from data message receiving element 502, from Label space memory cell 501, obtain the sign of described VPLS and entry PE according to described label, when ISP's network boundary equipment is not entry PE, and when the CE that is connected with this ISP's network boundary equipment belongs to described VPLS, get access to the pseudo-line of entry PE, in mac address table, preserve the mapping relations of described pseudo-line and source MAC;

Customer data transmitting element 504, be used for obtaining the data message of data message receiving element 502, from Label space memory cell 501, obtain the VPLS that label identified in the data message, remove the label in the data message, transmit customer data to the CE that belongs to described VPLS that is connected with this ISP's network boundary equipment.

A kind of system that transmits the VPLS customer data, as shown in Figure 6, this system comprises: entry PE, the multicast tree root network equipment, at least one multicast leaf PE, at least one CE, wherein,

The multicast tree root network equipment is used for the Label space information of entry PE that configuration identifier VPLS and needs use multicast tree is transmitted the customer data of described VPLS, and this Label space information is issued to entry PE and multicast leaf PE; Data message is handed down to multicast leaf PE, and wherein, described data message comprises customer data and identifies the affiliated VPLS of described customer data and the label of entry PE that described customer data comprises client's source MAC at least at least;

Entry PE, be used to receive CE and go up the customer data of sending out that contains source MAC, obtain the affiliated VPLS of CE, transmit customer data to the CE that belongs to described VPLS, in Label space information, obtain the label of described VPLS of sign and entry PE, label is encapsulated on the customer data formation data message is dealt into the tree root network equipment;

Multicast leaf PE, be used to preserve Label space information, from Label space information, obtain the sign of described VPLS and entry PE according to the label in the data message, when multicast leaf PE is not an entry PE, and when the CE that is connected with described multicast leaf PE belongs to described VPLS, get access to the pseudo-line of entry PE, preserve the mapping relations of described pseudo-line and source MAC; Remove label, transmit customer data to the CE that belongs to described VPLS.

A kind of system that transmits the VPLS customer data, as shown in Figure 7, this system comprises: the multicast tree root network equipment, at least one multicast leaf PE, at least one CE, wherein,

The multicast tree root network equipment is used for the Label space information of entry PE that configuration identifier VPLS and needs use multicast tree is transmitted the customer data of described VPLS, and this Label space information is issued to entry PE and multicast leaf PE; Be used to receive CE and go up the customer data of sending out that contains source MAC, obtain the affiliated VPLS of CE, transmit customer data to the CE that belongs to described VPLS, in Label space information, obtain the label of described VPLS of sign and tree root PE, label is encapsulated into customer data forms data message; Data message is handed down to multicast leaf PE, and wherein, described data message comprises customer data and identifies the affiliated VPLS of described customer data and the label of entry PE that described customer data comprises client's source MAC at least at least;

Multicast leaf PE, be used to preserve Label space information, from Label space information, obtain the sign of described VPLS and entry PE according to the label in the data message, determine that multicast leaf PE is not an entry PE, when the CE that is connected with described multicast leaf PE belongs to described VPLS, get access to the pseudo-line of entry PE, preserve the mapping relations of described pseudo-line and source MAC; Remove label, transmit customer data to the CE that belongs to described VPLS.

A kind of system that transmits the VPLS customer data, as shown in Figure 7, this system comprises: the multicast tree root network equipment, at least two multicast leaf PE, at least one CE, wherein,

Multicast leaf PE, be used to preserve Label space information, from Label space information, obtain the sign of described VPLS and entry PE according to the label in the data message, when multicast leaf PE is not an entry PE, and when the CE that is connected with described multicast leaf PE belongs to described VPLS, get access to the pseudo-line of entry PE, preserve the mapping relations of described pseudo-line and source MAC; Remove label, transmit customer data to the CE that belongs to described VPLS;

Wherein, multicast leaf PE comprises the multicast leaf PE as entry PE;

Multicast leaf PE as entry PE is used to receive the customer data that contains source MAC that CE upward sends out, obtain the affiliated VPLS of CE, transmit customer data to the CE that belongs to described VPLS, in Label space information, obtain the label of described VPLS of sign and entry PE, label is encapsulated on the customer data formation data message is dealt into the tree root network equipment.

More than the method for study MAC Address provided by the present invention and the system and the equipment that transmit the VPLS customer data are described in detail, used specific case herein principle of the present invention and execution mode are set forth, the explanation of above embodiment just is used for helping to understand method of the present invention and core concept thereof; Simultaneously, for one of ordinary skill in the art, according to thought of the present invention, the part that all can change in specific embodiments and applications, in sum, this description should not be construed as limitation of the present invention.

Claims

1. a method of learning MAC Address is characterized in that, this method comprises:

The tree root network equipment is handed down to leaf PE with data message;

Wherein, described customer data comprises client's source MAC at least;

2. method according to claim 1 is characterized in that, this method also comprises:

3. method according to claim 2 is characterized in that:

Described customer data also comprises target MAC (Media Access Control) address;

This method also comprises:

4. method according to claim 3 is characterized in that:

After steps A 11, this method also comprises: entry PE searches whether there is target MAC (Media Access Control) address in the mapping relations of MAC Address that prestores and pseudo-line, if there is no, and execution in step A12; If exist, be determined to the pseudo-line of target MAC (Media Access Control) address correspondence, and determine corresponding outlet PE according to described pseudo-line, obtain the pseudo line tag of described pseudo-line of sign and entry PE by described pseudo-line, described pseudo line tag is encapsulated into customer data forms data message, and send to outlet PE, outlet PE gets access to the pseudo-line of entry PE according to described pseudo line tag, preserve the mapping relations of described pseudo-line and client's source MAC, process ends.

5. according to claim 3 or 4 described methods, it is characterized in that:

Steps A 12 also comprises: entry PE is transmitted customer data according to the VPLS that obtains to the CE that belongs to described VPLS except that the CE that sends customer data;

When leaf PE was not entry PE, this method also comprised:

6. method according to claim 2, the described tree root network equipment is an entry PE, it is characterized in that:

This method also comprises:

7. method according to claim 6 is characterized in that, this method also comprises:

8. according to claim 6 or 7 described methods, it is characterized in that:

Steps A 22 also comprises: entry PE is transmitted customer data according to the VPLS that obtains to the CE that belongs to described VPLS except that the CE that sends customer data;

Leaf PE transmits customer data to the CE that belongs to described VPLS.

9. ISP's network boundary equipment is characterized in that this equipment comprises: the Label space memory cell, and the MAC address learning unit, the data message receiving element, wherein,

10. equipment according to claim 9 is characterized in that, this equipment also comprises:

11. a system that transmits the VPLS customer data, this system comprise the multicast tree root network equipment, at least one multicast leaf PE, and at least one CE, the data message of the described multicast tree root network equipment is characterized in that from entry PE: