CN103326940B - Method for forwarding message in network and edge device of operator - Google Patents

Abstract

The invention discloses a method for forwarding a message in a network and an edge device of an operator and belongs to the field of network transmission. The network comprises a first PE and a second PE, wherein the first PE and the second PE belong to a redundancy group RG, the RG corresponds to a virtual PE, the virtual PE has an IP address, the virtual PE is a member PE of a first VPLS instance, and a first CE is a local CE of the virtual PE in the first VPLS instance. The method for forwarding the message in the network comprises the following steps that the first PE receives an Ethernet frame which comes from the first CE, the first PE encapsulates the Ethernet frame and obtains an encapsulated message according to the type of the Ethernet frame, and the first PE sends the encapsulated message to a far-end PE of the virtual PE in the first VPLS instance. Due to the fact that the message is encapsulated by the adoption of the IP address of the virtual PE corresponding to the RG which includes the first PE and the second PE by the first PE, when the far-end PE receives the message and conducts MAC address learning, a next-hop PE corresponding to the MAC is the virtual PE all the time. Therefore, the hop change of the next-hop PE will not occur, and the stability of an MAC table is guaranteed.

Description

The method for E-Packeting in a network and provider edge equipment

Technical field

The present invention relates to field of network transmission, more particularly to a kind of method for E-Packeting in a network and Provider Edge Equipment.

Background technology

With the continuous development of ethernet technology, ethernet network scale is increasing.At present, carrier ethernet circuit It is widely used, (English full name is Virtual Private LAN Service to VPLS, English letter Referred to as VPLS) be one kind public the Internet agreement (English full name be Internet Protocol, English abbreviation is IP)/ In multiprotocol label switching (English full name is Multi-Protocol Label Switching, and English abbreviation is MPLS) network (English full name is Level-2Virtual Private Network to the point-to-multipoint Layer 2 virtual private network for providing, English Referred to as L2VPN) business.VPLS make use of ethernet technology and MPLS technology, will be distributed by the IP/MPLS networks of operator Multiple ethernet local area networks (English full name is Local Area Network, and English abbreviation is LAN) to different geographical are connected to Together, them are made as being connected to an Ethernet bridge.Based on media access control, (English full name is Media to VPLS Access Control, English abbreviation are MAC) address or MAC Address add VLAN (English full name be Virtual Local Area Network, English abbreviation is VLAN) making forwarding decision, (English full name is customer edge mark Custom Edge, English abbreviation are CE) equipment can be communicated with other CE for belonging to same VPLS examples.In CE equipment Apparently, the VPLS business that service provider network is provided is exactly an Ethernet bridge (or Ethernet switch).Current VPLS's Existing implementation needs to set up between provider edge equipment (English full name is Provider Edge, and English abbreviation is PE) Totally interconnected pseudo-wire (English full name is Pseudo Wire, and English abbreviation is PW) is simulating an Ethernet switch, existing in addition There are VPLS schemes only to support the multicast service of entrance copy mode, therefore exist in the network of a large amount of VPLS examples, existing VPLS There is serious scalability problem in technology, than if desired for safeguarding substantial amounts of PW states, and a large amount of entrances replicate the band for bringing Wide waste and Intermediate System-to-Intermediate System (English full name is Intermediate System-Intermediate System, English abbreviation is ISIS) VPLS by extend ISIS type lengths values (english abbreviation is TLV) realize VPLS reachability informations Notice, that is, complete neighbours and automatically find and signaling capability, it is to avoid the problems referred to above that existing VPLS technology is present.

In existing ISIS VPLS technologies, if two up-links of a CE are with across frame link aggregation group (English Full name is Multi-Chasis Link Aggegation Group, and English abbreviation is MC-LAG) PE1 that is respectively connected to and PE2, then for the CE, when receiving from CE the message that sends over and carry out MAC address learning, MAC pair Next-hop PE answered saltus step between a PE and the 2nd PE, causes MAC table unstable.

The content of the invention

Embodiments provide a kind of method for E-Packeting in a network and provider edge equipment.

The technical scheme of the embodiment of the present invention includes：

A kind of method for E-Packeting in a network, the network include：First provider edge equipment PE, the 2nd PE, First PE and the 2nd PE belong to redundancy group RG, and one virtual PE of the RG correspondences, the virtual PE have IP Address, the virtual PE are the member PE of the first Virtual Private LAN Service VPLS examples, during a VPLS examples are Between system to intermediate system ISIS VPLS examples, first user edge device CE is the virtual PE in a VPLS realities Example in local CE, a CE with across frame link aggregation group MC-LAG mode respectively with a PE and the 2nd PE It is connected, methods described includes：

First PE receives the Ether frame from a CE；

First PE is packaged message encapsulated after to the Ether frame according to the type of the Ether frame, And far-end PE of the message after the encapsulation to the virtual PE in a VPLS examples is sent, wherein the encapsulation The tunnel source address of message afterwards is the IP address of the virtual PE.

A kind of method for E-Packeting in a network, the network include：3rd PE and virtual PE, the virtual PE correspondences The member PE of RG include that a PE and the 2nd PE, the virtual PE have IP address, the virtual PE and the 3rd PE It is the member PE of a VPLS examples, a VPLS examples are Intermediate System-to-Intermediate System ISIS VPLS examples, described First PE is the most short member PE of the 3rd PE routes described in distance in the RG, and the 2nd CE is the 3rd PE in a VPLS realities Local CE in example, methods described include：

3rd PE receives from the 2nd CE Ether frame for sending over；

Multicast IPs of 3rd PE using the IP address or the corresponding multicast tree of a VPLS examples of the virtual PE Address is packaged to the Ether frame as tunnel destination address, and the message after encapsulation is sent to the virtual PE, is made The member PE for obtaining the corresponding RG of the virtual PE receives the message after the encapsulation and is decapsulated, and by after decapsulation Message is transmitted to a CE, and a CE is local CEs of the virtual PE in a VPLS examples, and described First CE is connected with the 2nd PE with a PE respectively in across frame link aggregation group MC-LAG mode.

A kind of first provider edge equipment, the first provider edge equipment PE belongs to redundancy group RG, described RG also includes the 2nd PE, and one virtual PE of the RG correspondences, the virtual PE have IP address, and the virtual PE is a VPLS The member PE of example, a VPLS examples are Intermediate System-to-Intermediate System ISIS VPLS examples, and first user edge sets Standby CE is local CEs of the virtual PE in a VPLS examples, and a CE is with across frame link aggregation group MC-LAG Mode is connected with the 2nd PE with a PE respectively, and a PE includes：

First receiver module, for receiving the Ether frame from a CE,

First sending module, for the type according to the Ether frame, is packaged to the Ether frame after being encapsulated Message, and to the virtual PE, far-end PE in a VPLS examples sends by the message after the encapsulation, wherein The tunnel source address of the message after the encapsulation is the IP address of the virtual PE.

A kind of 3rd provider edge equipment, the 3rd provider edge equipment PE are used to use in a network, described Network also includes virtual PE, and the member PE of the corresponding RG of the virtual PE includes that a PE and the 2nd PE, the virtual PE have IP address, a VPLS examples are Intermediate System-to-Intermediate System ISIS VPLS examples, the virtual PE and described the Three PE are the member PE of a VPLS examples, and a PE is the most short member of the 3rd PE routes described in distance in the RG PE, the 2nd CE are local CEs of the 3rd PE in a VPLS examples, and the 3rd PE includes：

Second receiver module, for receiving from the 2nd CE Ether frame for sending over；

Second sending module, for the IP address using the virtual PE or the corresponding multicast tree of a VPLS examples Multicast ip address is packaged to the Ether frame as tunnel destination address, and the message after encapsulation is sent to described virtual PE so that the member PE of the corresponding RG of the virtual PE receives the message after the encapsulation and decapsulated, and will deblocking Message after dress is transmitted to a CE, and a CE is local CEs of the virtual PE in a VPLS examples, and And a CE is connected with the 2nd PE with a PE respectively in across frame link aggregation group MC-LAG mode.

According to the method this enforcement Suo Shu, a PE is using the corresponding institutes of RG for including a PE and the 2nd PE State the IP address encapsulated message of virtual PE, therefore ensure that far-end PE receives the message and when carrying out MAC address learning, Corresponding next-hops PE of MAC are virtual PE all the time, thus are not in the saltus step between a PE and the 2nd PE of next-hop PE, are protected MAC table stability is demonstrate,proved.

Description of the drawings

For the technical scheme being illustrated more clearly that in the embodiment of the present invention, below will be to making needed for embodiment description Accompanying drawing is briefly described, it should be apparent that, drawings in the following description are only some embodiments of the present invention, for For those of ordinary skill in the art, on the premise of not paying creative work, can be obtaining other according to these accompanying drawings Accompanying drawing.

Fig. 1 is a kind of flow chart of method for E-Packeting in a network provided in an embodiment of the present invention；

Fig. 2 is a kind of Organization Chart of ISIS VPLS networks provided in an embodiment of the present invention；

Fig. 3 a are a kind of flow charts of provider edge equipment management method in a network provided in an embodiment of the present invention；

Fig. 3 b are a kind of flow charts of method for E-Packeting in a network provided in an embodiment of the present invention；

Fig. 4 is a kind of flow chart of method for E-Packeting in a network provided in an embodiment of the present invention；

Fig. 5 is a kind of structural representation of first provider edge equipment provided in an embodiment of the present invention；

Fig. 6 is a kind of structural representation of 3rd provider edge equipment provided in an embodiment of the present invention.

Specific embodiment

To make the object, technical solutions and advantages of the present invention clearer, below in conjunction with accompanying drawing to embodiment party of the present invention Formula is described in further detail.

Fig. 1 is a kind of flow chart of method for E-Packeting in a network provided in an embodiment of the present invention.In the network Including：First provider edge equipment (English full name is Provider Edge, and english abbreviation is PE), the 2nd PE, described first PE and the 2nd PE belong to a redundancy group (English full name is Redundancy Group, and english abbreviation is RG), the RG correspondences One virtual PE, that is to say, that the virtual PE includes that a PE and the 2nd PE, the virtual PE have IP ground Location, the virtual PE are that (English full name is Virtual Private Local Area for the first virtual private LAN service Network Service, english abbreviation are VPLS) the member PE of example, a VPLS examples are for (English full name is Intermediate System-Intermediate System, English abbreviation is ISIS) VPLS examples, first user side Edge equipment (English full name is Customer Edge, and english abbreviation is CE) is the virtual PE in a VPLS examples Local CE, with across frame link aggregation group, (English full name is Multi-Chasis Link Aggegation to a CE Group, English abbreviation are MC-LAG) mode is connected with the 2nd PE with a PE respectively.Referring to Fig. 1, methods described Including：

101st, a PE receives the Ether frame from a CE；

102nd, a PE is packaged the report after being encapsulated according to the type of the Ether frame to the Ether frame Text, and far-end PE of the message after the encapsulation to the virtual PE in a VPLS examples is sent, wherein described The tunnel source address of the message after encapsulation is the IP address of the virtual PE.

According to the method this enforcement Suo Shu, a PE is using the corresponding institutes of RG for including a PE and the 2nd PE State the IP address encapsulated message of virtual PE, therefore ensure that far-end PE receives the message and when carrying out MAC address learning, Corresponding next-hops PE of MAC are virtual PE all the time, thus are not in the saltus step between a PE and the 2nd PE of next-hop PE, are protected MAC table stability is demonstrate,proved.

Fig. 2 is a kind of Organization Chart of ISIS VPLS networks provided in an embodiment of the present invention.Referring to Fig. 2, in the VPLS network At least include：First PE, the 2nd PE, the 3rd PE and the 4th PE, a PE, the 2nd PE, the 3rd PE, the 4th PE are mainly responsible for VPN The access of business, completes mapping of the message from private network to public network tunnel and message from public network tunnel to private network with forwarding；CE can be with It is switch, or main frame, wherein, a CE is connected with a PE, the 2nd PE respectively in MC-LAG modes.Alternatively, VPLS network as shown in Figure 2 can not also include the 3rd PE or the 4th PE.

Fig. 3 a are a kind of flow charts of provider edge equipment management method in a network provided in an embodiment of the present invention. The embodiment is illustrated by taking the ISIS VPLS networks shown in Fig. 2 as an example.Referring to Fig. 3 a, the embodiment is specifically included：

301st, a PE obtains redundancy group (English full name is Redundancy Group, and english abbreviation is RG) information, should RG information includes the VPLS marks of the corresponding VPLS examples of the IP address of the corresponding virtual PE of the RG, the RG, the virtual PE VPLS labels for a VPLS example allocations and/or belong to the RG other member PE IP address, wherein described first VPLS examples are ISIS VPLS examples.Alternatively, the corresponding virtual PE of the RG include the member PE in the RG.

The RG includes a PE, and also including the 2nd PE, the virtual PE is the member PE of a VPLS examples, institute Stating virtual PE includes a PE and the 2nd PE, also includes a CE in network, and a CE is the virtual PE in institute State the local CE in a VPLS examples.First CE is connected specifically with a PE, the 2nd PE respectively in MC-LAG modes, First CE can be connected by MC-LAG modes with two or more PE.

It should be noted that each the member PE for belonging to RG obtains the RG information, the present embodiment only obtaining with a PE It is taken as example to illustrate.

First PE obtains RG information, can be used to instruct follow-up message to forward.

Wherein, virtual PE is to be generated by any member PE in the virtual PE for the VPLS labels of VPLS example allocations Or configured by technical staff.

In the VPLS network framework shown in Fig. 2, used as an example, the real ip address of a PE is 1.1.1.2, the The real ip address of two PE is 1.1.1.3, the IP address of the virtual PE can be set to 1.1.1.1, and the setting is by technical staff Carry out, the embodiment of the present invention is not specifically limited.

302nd, a PE is by the corresponding route reachability information of IP address that Routing Protocol issues the virtual PE.

In the present embodiment, the 2nd PE is also by the corresponding route accessibility of IP address that Routing Protocol issues the virtual PE Information.

Far-end PE (in the present embodiment, far-end PE is the 3rd PE or PE4) so from virtual PE in VPLS examples is sent out The tunnel destination address sent out be the VPLS messages of the IP address (i.e. 1.1.1.1) of virtual PE will be forwarded to from far-end PE compared with A near member PE.

303rd, when a PE is after it is determined that a PE is primary PE, the reachability information of a VPLS examples is issued, should The reachability information of the first VPLS examples include the corresponding VPLS examples of RG VPLS mark and virtual PE for this first The IP address of the VPLS labels and virtual PE of VPLS example allocations.

Alternatively, virtual router redundance is run by the communication interface between two member PE between a PE and the 2nd PE Agreement (English full name is Virtual Router Redundancy Protocol, and english abbreviation is VRRP) or across frame communication Agreement, English full name are Inter-Chassis Communication Protocol, and english abbreviation is ICCP) agreement, for Any one VPLS example, determines primary PE and standby PE.In the present embodiment, for the VPLS realities belonging to a CE Example, using a PE as primary PE, the 2nd PE as standby PE, when a PE is after it is determined that a PE is primary PE, by the One PE represents the reachability information that virtual PE issues a VPLS examples, and the reachability information of a VPLS examples includes RG pair The VPLS marks of the VPLS examples answered and VPLS labels and virtual PE that virtual PE is a VPLS example allocations IP address.

Preferably, need to ensure that a PE and the 2nd PE is directed to same VPLS example allocations identical VPLS label.For Ensure that a PE and the 2nd PE is directed to same VPLS example allocations identical VPLS label, VPLS labels can be set to Identical value is identified with VPLS, the corresponding VPLS labels of VPLS examples of such as VPLS marks=100 are also equal to 100.

After performing above-mentioned steps 301-303 method, one is defined in a VPLS examples including a PE and second The corresponding virtual PE of the RG of the PE and RG, and the letter of VPLS examples and virtual PE is have sent to the other equipment in network Breath, is encapsulated using the IP address of the corresponding virtual PE of RG for including a PE and the 2nd PE in order to a PE Message, so as to ensure that far-end PE receives the message and when carrying out MAC address learning, corresponding next-hops PE of MAC begin It is virtual PE eventually, is not in thus the saltus step between a PE and the 2nd PE of next-hop PE, it is ensured that MAC table stability. Therefore step 301-303 can be used for helping ensure that MAC table stability.

Fig. 3 b are a kind of flow charts of method for E-Packeting in a network provided in an embodiment of the present invention, and methods described should For in network as shown in Figure 2.The embodiment can be based on and perform the result as obtained from step 301-303 in Fig. 3 a, The result can be not based on.The ether that the first CE sends is received by aggregated links to work as a PE in the corresponding RG of virtual PE Illustrate as a example by frame, places of any one the member PE in RG after aggregated links receives the Ether frame that a CE sends Reason method is identical with the processing method of a PE.Referring to Fig. 3 b, the embodiment includes herein below.

304th, a PE receives the Ether frame from a CE (English full name is Ethernet frame)；

The Ether frame can for known destination's unicast Ether frame, unknown destination's unicast Ether frame, multicast Ether frame or Any one or more in broadcast Ether frame.

305th, types of the PE according to the Ether frame, is packaged the message after being encapsulated to the Ether frame, And far-end PE of the message after the encapsulation to the virtual PE in a VPLS examples is sent, wherein the encapsulation The tunnel source address of message afterwards is the IP address of the virtual PE.

The specific implementation of step 305 can include one or more in following four processing mode.

Processing mode 305-1

When the Ether frame is known destination's unicast Ether frame, a PE uses the IP address of the virtual PE as tunnel The IP address of source address and application target far-end PE is packaged to the Ether frame as tunnel destination address, to the purpose Far-end PE send encapsulation after message, wherein, the purpose far-end PE be a VPLS examples MAC forward tables in the Ether frame Corresponding next-hop PE of target MAC (Media Access Control) address；

Wherein, the encapsulation of VPLS data is encapsulated as, the message after the encapsulation carries the purpose far-end PE for a VPLS examples The VPLS labels of distribution, and tag types are that label is distributed in downstream so that and the purpose far-end PE for receiving the message can be known Do not go out which VPLS example the message encapsulated in tunnel belongs to.

Processing mode 305-2

When the Ether frame be unknown destination's unicast Ether frame, multicast Ether frame or broadcast Ether frame when, if this first VPLS examples adopt entrance copy mode, and the Ether frame is replicated, and obtain quantity with the virtual PE in a VPLS realities Multiple Ether frames of quantity identical of far-end PE in example；The plurality of Ether frame is packaged respectively and is obtained after multiple encapsulation Message, wherein, the tunnel source address of the message after each encapsulation is the IP address of the virtual PE, after each encapsulation The tunnel destination address of message is the IP address of a PE in the far-end PE, the tunnel destination of the message after the plurality of encapsulation Location is different；The message after the plurality of encapsulation is sent according to the tunnel destination address of the message after the plurality of encapsulation；

As now a VPLS examples employ entrance copy mode, it is therefore desirable to which the Ether frame to receiving carries out multiple System, to obtain the multiple Ether frames of quantity identical with the far-end PEs of the virtual PE in a VPLS examples, with respectively It is packaged, and sends to each far-end PE.

Optionally, in addition, the message after each encapsulation carries the VPLS marks that respective distal end PE is a VPLS example allocations Sign, and tag types be that label is distributed in downstream so that receive the message far-end PE can recognize that tunnel in encapsulate Which VPLS example message belongs to.

In the present embodiment, for far-end PE, the tunnel source address of the message after the encapsulation for receiving is virtual PE IP address, no matter the message is forwarded by which the member PE in the corresponding RG of virtual PE, and far-end PE is carrying out MAC Address During habit, all can ensure the stability of MAC forward tables using virtual PE as next-hop PE of above-mentioned MAC Address.

Processing mode 305-3

When the Ether frame be unknown destination's unicast Ether frame, multicast Ether frame or broadcast Ether frame when, if this first VPLS examples adopt non-polymeric multicast tree mode, a PE to use the IP address of the virtual PE as tunnel source address and use The multicast ip address of the corresponding multicast tree of the first VPLS examples is packaged to the Ether frame as tunnel destination address, Xiang Jia Enter the PE beyond the PE in the multicast tree and send the message after the encapsulation；

Wherein, after message after the 2nd PE receives the encapsulation, abandon the message after the encapsulation.

Wherein, non-polymeric multicast tree mode refers to for a VPLS example have a multicast tree to correspond to therewith, VPLS examples and multicast tree are one-to-one relations.

As VPLS examples and multicast tree are one-to-one relations, then VPLS labels need not be carried, after receiving encapsulation The PE of message can know which VPLS example the message belongs to by the purpose multicast ip address of message.

Further, a PE is sent to Ether frame on the 2nd PE so that the 2nd PE is made using the IP address of virtual PE For tunnel source address and using the corresponding multicast tree of a VPLS examples multicast ip address as tunnel destination address to this Ether frame is packaged, by multicast tree corresponding with a VPLS examples to described be added in the multicast tree PE beyond two PE sends the message Jing after the 2nd PE encapsulation.

It should be noted that a PE and member PE, a PE and the 2nd PE that the 2nd PE is the corresponding RG of virtual PE Between Ether frame interaction can be carried out by the communication interface between a PE and the 2nd PE.

Processing mode 305-4

When the Ether frame be unknown destination's unicast Ether frame, multicast Ether frame or broadcast Ether frame when, if this first VPLS examples adopt aggregated multicast tree mode, using the virtual PE IP address as tunnel source address and use this first The multicast ip address of the corresponding multicast tree of VPLS examples is packaged to the Ether frame as tunnel destination address, after the encapsulation Message carries a VPLS labels, and a VPLS labels are the VPLS labels that the virtual PE is a VPLS example allocations, The tag types of the first VPLS labels are that label is distributed in upstream, and the PE to beyond the PE being added in multicast tree sends institute State the message after encapsulation；

Wherein, aggregated multicast tree mode refers to that multiple VPLS examples share a multicast tree, and VPLS examples with multicast tree are Many-to-one relation.

As, in the aggregated multicast tree mode, VPLS examples and multicast tree are many-to-one relations, it is therefore desirable to by void Intend the VPLS labels that PE is a VPLS example allocations to carry in message after packaging, to receive after encapsulation The PE of message can know which VPLS example the message belongs to.And when using non-polymeric multicast tree method, then can not take The first VPLS labels of band.

Further, a PE is sent to the Ether frame on the 2nd PE so that the 2nd PE uses the virtual PE IP address as the tunnel source address and using the corresponding multicast tree of a VPLS examples multicast ip address as tunnel Road destination address is packaged to the Ether frame, and the message after encapsulation carries a VPLS labels, and a VPLS labels are should Virtual PE is the VPLS labels of a VPLS example allocations, and the tag types of a VPLS labels are that label is distributed in upstream, Jing is sent by the PE beyond multicast tree corresponding with a VPLS examples to the 2nd PE being added in the multicast tree should Message after 2nd PE encapsulation.The first PE and member PE that the 2nd PE is the corresponding RG of virtual PE, a PE and the 2nd PE it Between Ether frame interaction can be carried out by the communication interface between a PE and the 2nd PE.

According to the method this enforcement Suo Shu, a PE is using the corresponding institutes of RG for including a PE and the 2nd PE State the IP address encapsulated message of virtual PE, therefore ensure that far-end PE receives the message and when carrying out MAC address learning, Corresponding next-hops PE of MAC are virtual PE all the time, thus are not in the saltus step between a PE and the 2nd PE of next-hop PE, are protected MAC table stability is demonstrate,proved.

Fig. 4 is a kind of flow chart of method for E-Packeting in a network provided in an embodiment of the present invention.The network includes： The member PE of the corresponding RG of the 3rd PE and virtual PE, the virtual PE at least includes a PE and the 2nd PE, that is to say, that described Virtual PE includes that a PE and the 2nd PE, the virtual PE have IP address, and the virtual PE and the 3rd PE are It is the member PE of a VPLS examples, a PE is the most short member PE of the 3rd PE routes described in distance in the RG, the Two CE are local CEs of the 3rd PE in a VPLS examples, and a VPLS examples are Intermediate System-to-Intermediate System ISIS VPLS examples.Illustrate as a example by now receiving message using the 3rd PE of the far-end PE as virtual PE, referring to Fig. 4, should Embodiment includes herein below：

401st, the 3rd PE receives from the 2nd CE the Ether frame for sending over.

Alternatively, before the step 401, the embodiment also includes：3rd PE receive any one in the virtual PE or The corresponding route reachability information of IP address of the virtual PE that multiple member PE are issued by Routing Protocol；3rd PE receive by The reachability information of the corresponding VPLS examples of the RG that the virtual PE is issued, the VPLS examples are represented as a PE of primary PE Reachability information at least including the corresponding VPLS examples of the RG VPLS mark and the virtual PE be the VPLS example allocations The IP address of VPLS labels and virtual PE.

402nd, groups of the 3rd PE using the IP address or the corresponding multicast tree of a VPLS examples of the virtual PE Broadcast IP address to be packaged the Ether frame as tunnel destination address, and the message after encapsulation is sent to described virtual PE so that the member PE of the corresponding RG of the virtual PE receives the message after the encapsulation and decapsulated, and will deblocking Message after dress is transmitted to a CE, and a CE is local CEs of the virtual PE in a VPLS examples, and And a CE is connected with the 2nd PE with a PE respectively in MC-LAG modes.During first PE is the RG Most short member PE is route apart from the 3rd PE.

The specific implementation of step 402 can include one or more in following four processing mode.

Processing mode 402-1

When the Ether frame is known destination's unicast Ether frame, if under the target MAC (Media Access Control) address of the Ether frame is corresponding One jump is the virtual PE, then the 3rd PE uses the IP address of the virtual PE as tunnel destination address and uses the 3rd PE IP address the Ether frame is packaged as tunnel source address, message after encapsulation carries a VPLS labels, and this first VPLS labels are the VPLS labels that the virtual PE is a VPLS example allocations, under the tag types of a VPLS labels are Trip distribution label, the message after this is encapsulated are sent to a PE so that the message that a PE is received after the encapsulation is gone forward side by side Row decapsulation, and the message after decapsulation is transmitted to into a CE, a CE is the virtual PE in a VPLS examples Local CE.

It should be noted that message after the encapsulation can the 3rd PE routes described in distance in virtual PE or RG it is most short into Member PE is received.

In the present embodiment, it is that the 3rd PE of distance route most short member PE and is in the corresponding RG of virtual PE only with a PE Example is illustrated.

Processing mode 402-2

When the Ether frame be unknown destination's unicast Ether frame, multicast Ether frame or broadcast Ether frame when, if this first VPLS examples adopt entrance copy mode, then the 3rd PE is replicated to the Ether frame, obtain quantity with the 3rd PE at this Multiple Ether frames of quantity identical of far-end PE in first VPLS examples；The plurality of Ether frame is packaged respectively and is obtained Message after multiple encapsulation, wherein, the tunnel source address of the message after each encapsulation is the IP address of the 3rd PE, each The tunnel destination address of the message after the encapsulation is the IP address of a PE in the far-end PE of the 3rd PE, after the plurality of encapsulation Message tunnel destination address it is different；Message after encapsulation is sent to into corresponding far-end PE so that a PE connects Receive the message after the encapsulation of the IP address that tunnel destination address is the virtual PE and decapsulated, and by the message after decapsulation A CE is transmitted to, the wherein tunnel destination address is message the first VPLS of carrying after the encapsulation of the IP address of the virtual PE Label, a VPLS labels are the VPLS labels that the virtual PE is a VPLS example allocations, a VPLS labels Tag types are that label is distributed in downstream.

It should be noted that message after the encapsulation can the 3rd PE routes described in distance in virtual PE or RG it is most short into Member PE is received.

In the present embodiment, it is that the 3rd PE of distance route most short member PE and is in the corresponding RG of virtual PE only with a PE Example is illustrated.

Processing mode 402-3

When a PE is primary PE, the 2nd PE is standby PE, and a PE is added to corresponding with a VPLS Multicast tree, and the Ether frame be unknown destination's unicast Ether frame, multicast Ether frame or broadcast Ether frame when, if first VPLS examples adopt non-polymeric multicast tree mode, multicast IP ground of the 3rd PE using the corresponding multicast tree of a VPLS examples Location is packaged to the Ether frame as tunnel destination address and using the IP address of the 3rd PE as tunnel source address, will Message after encapsulation is forwarded by multicast tree corresponding with a VPLS examples so that after a PE receives the encapsulation Message and decapsulated, and the message after decapsulation is transmitted to into a CE.

Processing mode 402-4

When a PE is primary PE, the 2nd PE is standby PE, and a PE is added to corresponding with a VPLS Multicast tree, and the Ether frame be unknown destination's unicast Ether frame, multicast Ether frame or broadcast Ether frame when, if this first VPLS examples adopt aggregated multicast tree mode, multicast ip address of the 3rd PE using the corresponding multicast tree of a VPLS examples The Ether frame is packaged as tunnel source address as tunnel destination address and using the IP address of the 3rd PE, is encapsulated Message afterwards carries the 3rd VPLS labels, and the 3rd VPLS labels are the VPLS marks that the 3rd PE is a VPLS example allocations Sign, the tag types of the 3rd VPLS labels are that label is distributed in upstream, and the message after this is encapsulated is forwarded by multicast tree, So that a PE receives the message after the encapsulation and decapsulated, and the message after decapsulation is transmitted to into a CE.

Further, since in aggregated multicast tree mode, VPLS examples and multicast tree are many-to-one relations, then the report after encapsulating Text carries the 3rd VPLS labels, and the 3rd VPLS labels are the VPLS labels that the 3rd PE is a VPLS example allocations, should The tag types of the 3rd VPLS labels are that label is distributed in upstream, so that the PE for receiving the message after encapsulation knows that the message comes From which VPLS example.

It should be noted that alternatively, under polymerization or non-polymeric multicast tree mode, when a PE is primary PE, and the Two PE be standby PE when, as the 2nd PE is likely to be added in the corresponding multicast tree of a VPLS examples, then a PE and When 2nd PE has been added to multicast tree corresponding with a VPLS, in order to avoid a CE receive it is forwarded over from the 2nd PE Come the message for repeating, when after messages of the 2nd PE after encapsulation being received from the corresponding multicast trees of a VPLS, abandon the envelope Message after dress.Alternatively, when breaking down as the PE for primary PE, after the 2nd PE switches to primary PE, if Messages of 2nd PE after the corresponding multicast trees of a VPLS receive the encapsulation, after the 2nd PE decapsulates the encapsulation Message after decapsulation is simultaneously transmitted to a CE by message.

According to the method this enforcement Suo Shu, as, in the member PE of the corresponding RG of virtual PE, only one of which member PE connects The encapsulated message that sends over from the 3rd PE of receipts simultaneously will be transmitted to a CE after message decapsulation, it is to avoid a CE receives weight Multiple message.

Fig. 5 is a kind of structural representation of first provider edge equipment provided in an embodiment of the present invention.First operation Business's edge device (English full name be Provider Edge, english abbreviation is PE) belongs to a redundancy group, and (English full name is Redundancy Group, english abbreviation are RG), the RG also includes the 2nd PE, RG one virtual PE of correspondence, that is, Say, the virtual PE includes that a PE and the 2nd PE, the virtual PE have IP address, and the virtual PE is first (English full name is Virtual Private Local Area Network Service to Virtual Private LAN Service, English It is abbreviated as VPLS) the member PE of example, a VPLS examples are for (English full name is Intermediate System- Intermediate System, English abbreviation are ISIS) VPLS examples, (English full name is Custom to first user edge device Edge, english abbreviation are CE) it is local CEs of the virtual PE in a VPLS examples.Referring to Fig. 5, a PE includes：

First receiver module 501, for receiving the Ether frame from a CE；

First sending module 502, for the type according to the Ether frame, is packaged to the Ether frame and is encapsulated Message afterwards, and far-end PE of the message after the encapsulation to the virtual PE in a VPLS examples is sent, its Described in encapsulate after message tunnel source address be the virtual PE IP address.

Alternatively, the function of first receiver module 501 is realized that by the first physical receipt port described first sends mould The function of block 502 is realized that by the first physical circuit first physical circuit includes that first processor and the first physics send Port, the first processor are used to perform the encapsulation process in first sending module 502, and first physics is sent out Sending end mouth is used to perform the transmission processe in first sending module 502.

Alternatively, first sending module 502 includes one or more in following units：

First transmitting element, for when the Ether frame is known destination's unicast Ether frame, using the virtual PE IP address as the tunnel source address and application target far-end PE IP address as tunnel destination address to it is described with Too frame is packaged, and sends the message after encapsulation to the purpose far-end PE, wherein, the purpose far-end PE is described first Corresponding next-hop PE of target MAC (Media Access Control) address of Ether frame described in the MAC forward tables of VPLS examples.Alternatively, described first Unit is sent for performing the content of " processing mode 305-1 ".

Second transmitting element, is unknown destination's unicast Ether frame, multicast Ether frame or broadcast for working as the Ether frame During Ether frame, if a VPLS examples adopt entrance copy mode, the Ether frame is replicated, obtain quantity with The multiple Ether frames of quantity identical of far-end PEs of the virtual PE in a VPLS examples；To it is the plurality of with Too frame is packaged the message after obtaining multiple encapsulation respectively, wherein, the tunnel source address of the message after each described encapsulation is equal For the IP address of the virtual PE, the tunnel destination address of the message after each described encapsulation is a PE in the far-end PE IP address, the tunnel destination address of the message after the plurality of encapsulation is different；According to the message after the plurality of encapsulation Tunnel destination address send the message after the plurality of encapsulation.Alternatively, second transmitting element is used to perform " process side The content of formula 305-2 ".

3rd transmitting element, is unknown destination's unicast Ether frame, multicast Ether frame or broadcast for working as the Ether frame During Ether frame, if a VPLS examples adopt non-polymeric multicast tree mode, using the virtual PE IP address as The tunnel source address and using the corresponding multicast tree of a VPLS examples multicast ip address as tunnel destination Location is packaged to the Ether frame, after the PE to beyond the PE being added in the multicast tree sends the encapsulation Message.Alternatively, the 3rd transmitting element is used for the content for performing " processing mode 305-3 ".

4th transmitting element, is unknown destination's unicast Ether frame, multicast Ether frame or broadcast for working as the Ether frame During Ether frame, if a VPLS examples adopt aggregated multicast tree mode, using the IP address of the virtual PE as institute State tunnel source address and using the corresponding multicast tree of a VPLS examples multicast ip address as tunnel destination address The message is packaged, the message after the encapsulation carries a VPLS labels, a VPLS labels are the void Intend the VPLS labels that PE is a VPLS example allocations, the tag types of a VPLS labels are upstream distribution mark Sign, the PE to beyond the PE being added in the multicast tree sends the message after the encapsulation.Alternatively, described Four transmitting elements are used for the content for performing " processing mode 305-4 ".

Alternatively, it is every in first transmitting element, the second transmitting element, the 3rd transmitting element and the 4th transmitting element The function of individual unit is realized by the first processor and the first physics sending port.

Alternatively, the 3rd transmitting element is additionally operable to the Ether frame is sent on the 2nd PE so that described 2nd PE uses the IP address of the virtual PE as tunnel source address and uses the corresponding multicast of a VPLS examples The multicast ip address of tree is packaged to the Ether frame as tunnel destination address, by corresponding with a VPLS examples Multicast tree to the 2nd PE being added in the multicast tree beyond PE send described in the 2nd PE encapsulation after message.

Alternatively, the 4th transmitting element, is additionally operable to the Ether frame is sent on the 2nd PE so that described 2nd PE uses the IP address of the virtual PE as the tunnel source address and uses a VPLS examples corresponding The multicast ip address of multicast tree is packaged to the Ether frame as tunnel destination address, the report after the 2nd PE encapsulation described in Text carries a VPLS labels, and a VPLS labels are the VPLS marks that the virtual PE is a VPLS example allocations Sign, the tag types of a VPLS labels are that label is distributed in upstream, by multicast corresponding with a VPLS examples Set the message after the PE to beyond the 2nd PE being added in the multicast tree sends the encapsulation of the 2nd PE described in.

Alternatively, first provider edge equipment also includes：

First acquisition module 503, for obtaining RG information, the RG information includes the corresponding virtual PE's of the RG The VPLS marks of the corresponding VPLS examples of IP address, the RG, the virtual PE are a VPLS examples point The IP address of the VPLS labels matched somebody with somebody and/or other member PE for belonging to the RG；

Release module 504, the corresponding route accessibility letter of the IP address for the virtual PE is issued by Routing Protocol Breath；

The release module 504, is additionally operable to, after it is primary PE to determine the provider edge equipment, issue described first The reachability information of VPLS examples, the reachability information of a VPLS examples include the corresponding VPLS examples of the RG The IP address of VPLS is identified and the virtual PE is the VPLS example allocations VPLS labels and virtual PE.

Alternatively, the function of first acquisition module 503 is realized by the second physical circuit, the second physics electricity Road can include the second physical receipt port, to receive RG information.The second physical receipt port can be with described first Physical receipt port is same port, or different ports.Second physical circuit can further include Second processing device, to identify RG information.The second processing device can be same processor with the first processor, Can also be different processors.

Alternatively, a PE also includes：

Active and standby negotiation module 505, for determining primary PE and standby PE with the 2nd PE.Alternatively, the active and standby association The function of quotient module block 505 is realized by a processor.

In the present embodiment, a PE is using the corresponding virtual PE of RG for including a PE and the 2nd PE IP address encapsulated message, therefore ensure that far-end PE receives the message and when carrying out MAC address learning, MAC correspondences Next-hop PE be virtual PE all the time, thus be not in the saltus step between a PE and the 2nd PE of next-hop PE, it is ensured that MAC Table stability.

In one embodiment of the invention, (English full name is Provider to a kind of first provider edge equipment Edge, english abbreviation are PE) belong to a redundancy group (English full name is Redundancy Group, and english abbreviation is RG), institute RG is stated also including the 2nd PE, RG one virtual PE of correspondence, that is to say, that the virtual PE includes a PE and described the Two PE, the virtual PE have an IP address, and the virtual PE is that (English full name is the first Virtual Private LAN Service Virtual Private Local Area Network Service, english abbreviation is VPLS) the member PE of example, described One VPLS examples are for (English full name is Intermediate System-Intermediate System, and English abbreviation is ISIS) VPLS examples, first user edge device (English full name is Custom Edge, and english abbreviation is CE) are described virtual Local CEs of the PE in a VPLS examples.

First PE includes herein below.

Acquisition module, for obtaining RG information, the RG information include the corresponding virtual PE of the RG IP address, The VPLS marks of the corresponding VPLS examples of the RG, the VPLS that the virtual PE is a VPLS example allocations Label and/or belong to the RG other member PE IP address.Alternatively, the acquisition module is used to perform shown in Fig. 3 a Step 301.

Release module, the corresponding route reachability information of the IP address for the virtual PE is issued by Routing Protocol. Alternatively, the release module is used to perform the step 302 shown in Fig. 3 a.

The release module is additionally operable to after it is primary PE to determine the provider edge equipment, issues a VPLS The reachability information of example, the reachability information of a VPLS examples include the VPLS marks of the corresponding VPLS examples of the RG Know the IP address with the VPLS labels and virtual PE that the virtual PE is the VPLS example allocations.Alternatively, the issue Module is additionally operable to perform the step 303 shown in Fig. 3 a.

First PE is for defining RG and an institute including a PE and the 2nd PE in a VPLS examples State the corresponding virtual PE of RG, and the information of VPLS examples and virtual PE is have sent to the other equipment in network, in order to IP address encapsulated messages of one PE using the corresponding virtual PE of RG for including a PE and the 2nd PE, so as to protect When having demonstrate,proved far-end PE and receive the message and carry out MAC address learning, corresponding next-hops PE of MAC are virtual PE all the time, Be not in thus the saltus step between a PE and the 2nd PE of next-hop PE, it is ensured that MAC table stability.Therefore described first PE can be used for helping ensure that MAC table stability.

Fig. 6 is a kind of structural representation of 3rd provider edge equipment provided in an embodiment of the present invention.3rd fortune Battalion business's edge device (PE) for using in a network, the network except including the 3rd provider edge equipment (PE) it Outward, also including virtual PE, the member PE of the corresponding RG of the virtual PE includes a PE and the 2nd PE, that is to say, that the void Intending PE includes that a PE and the 2nd PE, the virtual PE have IP address, the virtual PE and the 3rd PE It is the member PE of a VPLS examples, a PE is the most short member PE of the 3rd PE routes described in distance in the RG, the Two CE are local CEs of the 3rd PE in a VPLS examples, and a VPLS examples are Intermediate System-to-Intermediate System ISIS VPLS examples.3rd PE includes：

Second receiver module 601, for receiving from the 2nd CE Ether frame for sending over；

Second sending module 602, for the IP address using the virtual PE or the corresponding multicast of a VPLS examples The multicast ip address of tree is packaged to the Ether frame as tunnel destination address, and the message after encapsulation is sent to described Virtual PE so that the member PE of the corresponding RG of the virtual PE receives the message after the encapsulation and decapsulated, and will Message after decapsulation is transmitted to a CE, and a CE is the virtual PE local in a VPLS examples CE, and a CE is connected with the 2nd PE with a PE respectively in MC-LAG modes.

Alternatively, second receiver module 601 and second sending module 602 are respectively used to perform shown in Fig. 4 Step 401 and 402.

A PE described in the present embodiment is the most short member PE of the 3rd PE routes described in distance in the RG.

Alternatively, the function of second receiver module 601 is realized that by the 3rd physical receipt port described second sends mould The function of block 602 is realized that by the 3rd physical circuit the 3rd physical circuit includes that the 3rd processor and the 3rd physics send Port, the 3rd processor are used to perform the encapsulation process in second receiver module 602, and the 3rd physics is sent out Sending end mouth is used to perform the transmission processe in second sending module 602.

Alternatively, second sending module 602 is included with one or more in lower unit：

5th transmitting element, for when the Ether frame is known destination's unicast Ether frame, if the Ether frame Corresponding next-hop PE of target MAC (Media Access Control) address be the virtual PE, then using the IP address of the virtual PE as tunnel purpose Address and the Ether frame is packaged as tunnel source address using the IP address of the 3rd provider edge equipment, Message after encapsulation carries a VPLS labels, and a VPLS labels are that the virtual PE is a VPLS examples point The VPLS labels matched somebody with somebody, the tag types of a VPLS labels are that label is distributed in downstream, and the message after the encapsulation is sent To a PE so that the PE receives the message after the encapsulation and decapsulated, and by the report after decapsulation Text is transmitted to a CE.Alternatively, the 5th transmitting element is used to perform " processing mode 402-1 ".

6th transmitting element, is unknown destination's unicast Ether frame, multicast Ether frame or broadcast for working as the Ether frame During Ether frame, if a VPLS examples adopt entrance copy mode, the Ether frame is replicated, quantity is obtained With the multiple ether of quantity identical of far-end PE of the 3rd provider edge equipment in a VPLS examples Frame；The message obtained after multiple encapsulation is packaged respectively to the plurality of Ether frame, wherein, the message after each described encapsulation Tunnel source address be the IP address of the 3rd provider edge equipment, the tunnel purpose of the message after each described encapsulation Address is the IP address of a PE in the far-end PE of the 3rd provider edge equipment, the message after the plurality of encapsulation Tunnel destination address is different；Message after encapsulation is sent to into corresponding far-end PE so that a PE receives tunnel Destination address is the message after the encapsulation of the IP address of the virtual PE and is decapsulated, and the message after decapsulation is forwarded To a CE, wherein the tunnel destination address is the message after the encapsulation of the IP address of the virtual PE carries first VPLS labels, a VPLS labels are the VPLS labels that the virtual PE is a VPLS example allocations, described The tag types of one VPLS labels are that label is distributed in downstream.Alternatively, the 6th transmitting element is used to perform " the process side Formula 402-2 ".

7th transmitting element, is primary PE for a PE, and the 2nd PE is standby PE, the PE additions To multicast tree corresponding with a VPLS, and the Ether frame is unknown destination's unicast Ether frame, multicast Ether frame Or during broadcast Ether frame, if a VPLS examples adopt non-polymeric multicast tree mode, using VPLS examples correspondence Multicast tree multicast ip address as tunnel destination address and using the 3rd provider edge equipment IP address make The Ether frame is packaged for tunnel source address, by the message after encapsulation by with corresponding group of a VPLS examples Broadcast tree to be forwarded so that the PE receives the message after the encapsulation and decapsulated, and by the report after decapsulation Text is transmitted to a CE.Alternatively, the 7th transmitting element is used to perform " processing mode 402-3 ".

8th transmitting element, for being primary PE as a PE, the 2nd PE is standby PE, and a PE adds Enter to multicast tree corresponding with a VPLS, and the Ether frame is unknown destination's unicast Ether frame, multicast ether When frame or broadcast Ether frame, if a VPLS examples adopt aggregated multicast tree mode, using a VPLS examples The multicast ip address of corresponding multicast tree is used as tunnel destination address and the IP ground using the 3rd provider edge equipment Location is packaged to the Ether frame as tunnel source address, message the 3rd VPLS labels of carrying after encapsulation, and the described 3rd VPLS labels are the VPLS labels that the 3rd provider edge equipment is a VPLS example allocations, the 3rd VPLS The tag types of label are that label is distributed in upstream, the message after the encapsulation are forwarded by multicast tree so that described the One PE receives the message after the encapsulation and is decapsulated, and the message after decapsulation is transmitted to a CE.It is optional Ground, the 8th transmitting element are used to perform " processing mode 402-4 ".

Alternatively, it is every in the 5th transmitting element, the 6th transmitting element, the 7th transmitting element and the 8th transmitting element The function of individual unit is realized by the 3rd processor and the 3rd physics sending port.

Alternatively, the 3rd provider edge equipment also includes：

3rd receiver module 603, for receiving any one or more the member PE in the virtual PE by Routing Protocol The corresponding route reachability information of IP address of the described virtual PE for issuing；

3rd receiver module 603, is additionally operable to receive described RG pair issued by the PE as primary PE The reachability information of the VPLS examples answered, the reachability information of the VPLS examples include the corresponding VPLS examples of the RG VPLS is identified, and the virtual PE is the IP address of the VPLS labels of the VPLS example allocations and the virtual PE.

Alternatively, the function of the 3rd receiver module 603 realized by a 4th physical receipt port, the 4th thing Reason receiving port can be identical port, or different ports from the 3rd physical receipt port.

In this embodiment, as, in the member PE of the corresponding RG of virtual PE, only one of which member PE is received from the 3rd PE The encapsulated message that sends over simultaneously will be transmitted to a CE after message decapsulation, it is to avoid a CE receives the message of repetition.

One of ordinary skill in the art will appreciate that realizing that all or part of step of above-described embodiment can pass through hardware To complete, it is also possible to instruct the hardware of correlation to complete by program, described program can be stored in a kind of computer-readable In storage medium, storage medium mentioned above can be read only memory, disk or CD etc..

The foregoing is only presently preferred embodiments of the present invention, not to limit the present invention, all spirit in the present invention and Within principle, any modification, equivalent substitution and improvements made etc. should be included within the scope of the present invention.

Claims (15)

1. a kind of method for E-Packeting in a network, it is characterised in that the network includes：First provider edge equipment PE, the 2nd PE, a PE are primary PE, and the 2nd PE is standby PE, and a PE and the 2nd PE belongs to one Individual redundancy group RG, one virtual PE of the RG correspondences, the virtual PE have IP address, and the virtual PE is the first virtual private The member PE of LAN services VPLS example, a VPLS examples are Intermediate System-to-Intermediate System ISIS VPLS examples, First user edge device CE is local CEs of the virtual PE in a VPLS examples, and a CE is with across frame chain Road aggregation group MC-LAG mode is connected with the 2nd PE with a PE respectively, and methods described includes：

First PE receives the Ether frame from a CE；

Types of first PE according to the Ether frame, is packaged the message after being encapsulated to the Ether frame, and will Far-end PE of the message after the encapsulation to the virtual PE in a VPLS examples sends, wherein after the encapsulation The tunnel source address of message is the IP address of the virtual PE.

2. method according to claim 1, it is characterised in that types of the PE according to the Ether frame, to institute State Ether frame and be packaged the message after being encapsulated, and by the message after the encapsulation to the virtual PE described first Far-end PE in VPLS examples sends, and specifically includes：

When the Ether frame is known destination's unicast Ether frame, using the IP address of the virtual PE as the tunnel source The IP address of address and application target far-end PE is packaged to the Ether frame as tunnel destination address, to the purpose Far-end PE sends the message after encapsulation, wherein, the purpose far-end PE is described in the MAC forward tables of a VPLS examples Corresponding next-hop PE of target MAC (Media Access Control) address of Ether frame；

And/or,

When the Ether frame is unknown destination's unicast Ether frame, multicast Ether frame or broadcast Ether frame, if described first VPLS examples adopt entrance copy mode, and the Ether frame is replicated, and obtain quantity and the virtual PE described first The multiple Ether frames of quantity identical of the far-end PE in VPLS examples；The plurality of Ether frame is packaged respectively and is obtained Message after multiple encapsulation, wherein, the tunnel source address of the message after each described encapsulation is the IP address of the virtual PE, The tunnel destination address of the message after each described encapsulation is the IP address of a PE in the far-end PE, the plurality of encapsulation The tunnel destination address of message afterwards is different；According to the tunnel destination address of the message after the plurality of encapsulation sends Message after multiple encapsulation；

And/or,

When the Ether frame is unknown destination's unicast Ether frame, multicast Ether frame or broadcast Ether frame, if described first VPLS examples adopt non-polymeric multicast tree mode, using the IP address of the virtual PE as the tunnel source address and use The multicast ip address of the corresponding multicast tree of the first VPLS examples is packaged to the Ether frame as tunnel destination address, PE to beyond the PE being added in the multicast tree sends the message after the encapsulation；

And/or,

When the Ether frame is unknown destination's unicast Ether frame, multicast Ether frame or broadcast Ether frame, if described first VPLS examples adopt aggregated multicast tree mode, using the virtual PE IP address is as the tunnel source address and uses institute The multicast ip address for stating the corresponding multicast tree of a VPLS examples is packaged to the Ether frame as tunnel destination address, institute State the message after encapsulation and carry a VPLS labels, it is a VPLS examples that a VPLS labels are the virtual PE The VPLS labels of distribution, the tag types of a VPLS labels are that label is distributed in upstream, to being added in the multicast tree A PE beyond PE send the message after the encapsulation.

3. method according to claim 2, it is characterised in that

When the Ether frame is unknown destination's unicast Ether frame, multicast Ether frame or broadcast Ether frame, if described first VPLS examples adopt non-polymeric multicast tree mode, using the IP address of the virtual PE as the tunnel source address and use The multicast ip address of the corresponding multicast tree of the first VPLS examples is packaged to the Ether frame as tunnel destination address, PE to beyond the PE being added in the multicast tree sends the message after the encapsulation, also includes：

First PE is sent to the Ether frame on the 2nd PE so that IPs of the 2nd PE using the virtual PE Address as tunnel source address and using the corresponding multicast tree of a VPLS examples multicast ip address as tunnel mesh Address the Ether frame is packaged, by multicast tree corresponding with a VPLS examples to being added to the multicast The message after PE transmissions the 2nd PE encapsulation described in beyond the 2nd PE in tree；

And/or,

When the Ether frame is unknown destination's unicast Ether frame, multicast Ether frame or broadcast Ether frame, if described first VPLS examples adopt aggregated multicast tree mode, using the virtual PE IP address is as the tunnel source address and uses institute The multicast ip address for stating the corresponding multicast tree of a VPLS examples is packaged to the Ether frame as tunnel destination address, institute State the message after encapsulation and carry a VPLS labels, it is a VPLS examples that a VPLS labels are the virtual PE The VPLS labels of distribution, the tag types of a VPLS labels are that label is distributed in upstream, to being added in the multicast tree A PE beyond PE send the message after the encapsulation, also include：

First PE is sent to the Ether frame on the 2nd PE so that IPs of the 2nd PE using the virtual PE Address as the tunnel source address and using the corresponding multicast tree of a VPLS examples multicast ip address as tunnel Road destination address is packaged to the Ether frame, and the message after the 2nd PE encapsulation described in carries a VPLS labels, described First VPLS labels are the VPLS labels that the virtual PE is a VPLS example allocations, the mark of a VPLS labels It is that label is distributed in upstream to sign type, by multicast tree corresponding with a VPLS examples to being added in the multicast tree PE beyond 2nd PE sends the message after the 2nd PE described in is encapsulated.

4. method according to claim 1, it is characterised in that receive the ether from a CE in a PE Before frame, including：

First PE obtains RG information, and the RG information includes the IP address of the corresponding virtual PE of the RG, the RG The VPLS marks of a corresponding VPLS examples, the VPLS labels that the virtual PE is a VPLS example allocations And/or belong to the IP address of other member PE of the RG；

First PE is by the corresponding route reachability information of IP address that Routing Protocol issues the virtual PE；

First PE issues the reachability information of a VPLS examples, institute after it is determined that a PE is primary PE The reachability information for stating a VPLS examples includes that the VPLS marks and the virtual PE of the corresponding VPLS examples of the RG are institute State the IP address of the VPLS labels and virtual PE of VPLS example allocations.

5. a kind of method for E-Packeting in a network, it is characterised in that the network includes：3rd PE and virtual PE, it is described The member PE of the corresponding RG of virtual PE includes that a PE and the 2nd PE, a PE are primary PE, and the 2nd PE is standby PE, the virtual PE have a member PE that IP address, the virtual PE and the 3rd PE are a VPLS examples, and described One VPLS examples are Intermediate System-to-Intermediate System ISIS VPLS examples, and a PE is the 3rd described in distance in the RG PE route most short member PE, and the 2nd CE is local CEs of the 3rd PE in a VPLS examples, and methods described includes：

3rd PE receives from the 2nd CE Ether frame for sending over；

Multicast ip address of 3rd PE using the IP address or the corresponding multicast tree of a VPLS examples of the virtual PE The Ether frame is packaged as tunnel destination address, and the message after encapsulation is sent to into the virtual PE so that institute The member PE for stating the corresponding RG of virtual PE receives the message after the encapsulation and is decapsulated, and by the message after decapsulation It is transmitted to a CE, a CE is local CEs of the virtual PE in a VPLS examples, and described first CE is connected with the 2nd PE with a PE respectively in across frame link aggregation group MC-LAG mode.

6. method according to claim 5, it is characterised in that the 3rd PE using the virtual PE IP address or The multicast ip address of the corresponding multicast tree of the first VPLS examples is packaged to the Ether frame as tunnel destination address, and will Message after encapsulation is sent to the virtual PE so that after the member PE of the corresponding RG of the virtual PE receives the encapsulation Message is simultaneously decapsulated, and the message after decapsulation is transmitted to a CE, is specifically included：

When the Ether frame is known destination's unicast Ether frame, if under the target MAC (Media Access Control) address of the Ether frame is corresponding One jumps PE for the virtual PE, then the 3rd PE uses the IP address of the virtual PE as tunnel destination address and uses The IP address of the 3rd PE is packaged to the Ether frame as tunnel source address, and the message after encapsulation carries a VPLS Label, a VPLS labels are the VPLS labels that the virtual PE is a VPLS example allocations, described first The tag types of VPLS labels are that label is distributed in downstream, the message after the encapsulation are sent to a PE so that described First PE receives the message after the encapsulation and is decapsulated, and the message after decapsulation is transmitted to a CE；

When the Ether frame is unknown destination's unicast Ether frame, multicast Ether frame or broadcast Ether frame, if described first VPLS examples adopt entrance copy mode, then the 3rd PE is replicated to the Ether frame, obtains quantity with the described 3rd The multiple Ether frames of quantity identical of far-end PEs of the PE in a VPLS examples；The plurality of Ether frame is distinguished The message being packaged after obtaining multiple encapsulation, wherein, the tunnel source address of the message after each described encapsulation is described The IP address of three PE, the tunnel destination address of the message after each described encapsulation are a PE in the far-end PE of the 3rd PE IP address, the tunnel destination address of the message after the plurality of encapsulation is different；Message after encapsulation is sent to into correspondence Far-end PE so that the PE receives the message after the encapsulation of the IP address that tunnel destination address is the virtual PE and goes forward side by side Row decapsulation, and the message after decapsulation is transmitted to into a CE, wherein the tunnel destination address is the virtual PE IP address encapsulation after message carry a VPLS labels, a VPLS labels be the virtual PE be described first The VPLS labels of VPLS example allocations, the tag types of a VPLS labels are that label is distributed in downstream；

When a PE is primary PE, the 2nd PE is standby PE, and a PE is added to and the described first VPLS pair The multicast tree answered, and the Ether frame be unknown destination's unicast Ether frame, multicast Ether frame or broadcast Ether frame when, if First VPLS examples adopt non-polymeric multicast tree mode, and the 3rd PE is using the corresponding multicast tree of a VPLS examples Multicast ip address as tunnel destination address and using the 3rd PE IP address as tunnel source address to the ether Frame is packaged, and the message after encapsulation is forwarded by multicast tree corresponding with a VPLS examples so that described First PE receives the message after the encapsulation and is decapsulated, and the message after decapsulation is transmitted to a CE；

When a PE is primary PE, the 2nd PE is standby PE, and a PE is added to and the described first VPLS pair The multicast tree answered, and the Ether frame be unknown destination's unicast Ether frame, multicast Ether frame or broadcast Ether frame when, if The first VPLS examples adopt aggregated multicast tree mode, the 3rd PE to use the corresponding multicast tree of a VPLS examples Multicast ip address as tunnel destination address and using the 3rd PE IP address as tunnel source address to it is described with Too frame is packaged, and the message after encapsulation carries the 3rd VPLS labels, and it is described that the 3rd VPLS labels are the 3rd PE The VPLS labels of the first VPLS example allocations, the tag types of the 3rd VPLS labels are that label is distributed in upstream, by the envelope Message after dress is forwarded by multicast tree so that a PE receives the message after the encapsulation and decapsulated, And the message after decapsulation is transmitted to into a CE.

7. method according to claim 5, it is characterised in that the 3rd PE using the IP address of the virtual PE or The multicast ip address of the corresponding multicast tree of the first VPLS examples of person is packaged to the Ether frame as tunnel destination address, and After message after encapsulation is sent to the virtual PE, methods described also includes：

When a PE is primary PE, the 2nd PE is standby PE, and a PE and the 2nd PE has been added to and described first During the corresponding multicast trees of VPLS, reports of the 2nd PE after the encapsulation is received from the corresponding multicast trees of a VPLS Wen Hou, abandons the message after the encapsulation；

And/or

When a PE breaks down, after the 2nd PE switches to primary PE, if the 2nd PE passes through described first The corresponding multicast trees of VPLS receive the message after the encapsulation, and the 2nd PE decapsulates the message after the encapsulation and will solve Message after encapsulation is transmitted to a CE.

8. the method according to claim 5,6 or 7, it is characterised in that receive from the 2nd CE in the 3rd PE Before the Ether frame for sending over, methods described also includes：

3rd PE receives the described virtual PE that any one or more member PE of the virtual PE are issued by Routing Protocol The corresponding route reachability information of IP address；

3rd PE receives the accessibility of the corresponding VPLS examples of the RG issued by the PE as primary PE Information, the reachability information of the VPLS examples include the VPLS marks of the corresponding VPLS examples of the RG, and the virtual PE is The IP address of the VPLS labels of the VPLS example allocations and the virtual PE.

9. a kind of first provider edge equipment, it is characterised in that the first provider edge equipment PE belongs to a redundancy Group RG, the RG also include that the 2nd PE, a PE are primary PE, and the 2nd PE is standby PE, the RG correspondences one Virtual PE, the virtual PE have IP address, and the virtual PE is the member PE of a VPLS examples, a VPLS examples For Intermediate System-to-Intermediate System ISIS VPLS examples, first user edge device CE is the virtual PE described first Local CE in VPLS examples, a CE with across frame link aggregation group MC-LAG mode respectively with a PE and described 2nd PE is connected, and a PE includes：

First receiver module, for receiving the Ether frame from a CE,

First sending module, for the type according to the Ether frame, is packaged the report after being encapsulated to the Ether frame Text, and far-end PE of the message after the encapsulation to the virtual PE in a VPLS examples is sent, wherein described The tunnel source address of the message after encapsulation is the IP address of the virtual PE.

10. the first provider edge equipment according to claim 9, it is characterised in that first sending module includes One or more in following units：

First transmitting element, for when the Ether frame is known destination's unicast Ether frame, using the IP of the virtual PE Address as the tunnel source address and application target far-end PE IP address as tunnel destination address to the Ether frame Be packaged, the message after encapsulation is sent to the purpose far-end PE, wherein, the purpose far-end PE is a VPLS realities Corresponding next-hop PE of target MAC (Media Access Control) address of Ether frame described in the MAC forward tables of example；

Second transmitting element, for when the Ether frame is unknown destination's unicast Ether frame, multicast Ether frame or broadcasts ether During frame, if a VPLS examples adopt entrance copy mode, the Ether frame is replicated, obtain quantity with it is described The multiple Ether frames of quantity identical of virtual far-end PEs of the PE in a VPLS examples；To the plurality of Ether frame The message being packaged after obtaining multiple encapsulation respectively, wherein, the tunnel source address of the message after each described encapsulation is institute The IP address of virtual PE is stated, the tunnel destination address of the message after each described encapsulation is the IP of a PE in the far-end PE Address, the tunnel destination address of the message after the plurality of encapsulation are different；According to the tunnel of the message after the plurality of encapsulation Road destination address sends the message after the plurality of encapsulation；

3rd transmitting element, for when the Ether frame is unknown destination's unicast Ether frame, multicast Ether frame or broadcasts ether During frame, if a VPLS examples adopt non-polymeric multicast tree mode, using the IP address of the virtual PE as described Tunnel source address and using the corresponding multicast tree of a VPLS examples multicast ip address as tunnel destination address pair The Ether frame is packaged, and the PE to beyond the PE being added in the multicast tree sends the report after the encapsulation Text；

4th transmitting element, for when the Ether frame is unknown destination's unicast Ether frame, multicast Ether frame or broadcasts ether During frame, if a VPLS examples adopt aggregated multicast tree mode, using the IP address of the virtual PE as the tunnel Road source address and using the corresponding multicast tree of a VPLS examples multicast ip address as tunnel destination address to institute State Ether frame to be packaged, the message after the encapsulation carries a VPLS labels, a VPLS labels are described virtual PE is the VPLS labels of a VPLS example allocations, and the tag types of a VPLS labels are that label is distributed in upstream, PE to beyond the PE being added in the multicast tree sends the message after the encapsulation.

11. first provider edge equipments according to claim 10, it is characterised in that

3rd transmitting element is additionally operable to the Ether frame is sent on the 2nd PE so that the 2nd PE uses institute The IP address of virtual PE is stated as tunnel source address and the multicast IP ground using the corresponding multicast tree of a VPLS examples Location is packaged to the Ether frame as tunnel destination address, by multicast tree corresponding with a VPLS examples to plus Enter the message after the PE beyond the 2nd PE in the multicast tree sends the 2nd PE encapsulation described in；

4th transmitting element, is additionally operable to the Ether frame is sent on the 2nd PE so that the 2nd PE is used The IP address of the virtual PE is used as the tunnel source address and the group using the corresponding multicast tree of a VPLS examples Broadcast IP address to be packaged the Ether frame as tunnel destination address, the message after the 2nd PE encapsulation described in carries first VPLS labels, a VPLS labels are the VPLS labels that the virtual PE is a VPLS example allocations, described The tag types of one VPLS labels are that label is distributed in upstream, by multicast tree corresponding with a VPLS examples to being added to PE beyond the 2nd PE in the multicast tree sends the message after the 2nd PE described in is encapsulated.

12. first provider edge equipments according to claim 9 a, it is characterised in that PE includes：

First acquisition module, for obtaining RG information, the RG information include the corresponding virtual PE of the RG IP address, The VPLS marks of the corresponding VPLS examples of the RG, the VPLS that the virtual PE is a VPLS example allocations Label and/or belong to the RG other member PE IP address；

Release module, the corresponding route reachability information of the IP address for the virtual PE is issued by Routing Protocol；

The release module, is additionally operable to, after it is primary PE to determine a PE, issue the reachable of a VPLS examples Property information, the reachability information of a VPLS examples includes the VPLS marks and the void of the corresponding VPLS examples of the RG Intend the IP address of VPLS labels and virtual PE that PE is the VPLS example allocations.

13. a kind of 3rd provider edge equipments, it is characterised in that the 3rd provider edge equipment PE is used in a network Use, the network also includes virtual PE, the member PE of the corresponding RG of the virtual PE includes a PE and the 2nd PE, described the One PE is primary PE, and the 2nd PE is standby PE, and the virtual PE has an IP address, and a VPLS examples are middle system Unite intermediate system ISIS VPLS examples, the virtual PE and the 3rd PE is the member PE of a VPLS examples, described First PE is the most short member PE of the 3rd PE routes described in distance in the RG, and the 2nd CE is the 3rd PE in a VPLS realities Local CE in example, the 3rd PE include：

Second receiver module, for receiving from the 2nd CE Ether frame for sending over；

Second sending module, for the IP address using the virtual PE or the multicast of the corresponding multicast tree of a VPLS examples IP address is packaged to the Ether frame as tunnel destination address, and the message after encapsulation is sent to the virtual PE, So that the member PE of the corresponding RG of the virtual PE receives the message after the encapsulation and is decapsulated, and will be after decapsulation Message be transmitted to a CE, a CE is local CEs of the virtual PE in a VPLS examples, and institute State a CE and be connected with the 2nd PE with a PE in across frame link aggregation group MC-LAG mode respectively.

14. the 3rd provider edge equipments according to claim 13, it is characterised in that second sending module is at least Including following any cell：

5th transmitting element, for when the Ether frame is known destination's unicast Ether frame, if the mesh of the Ether frame Corresponding next-hop PE of MAC Address be the virtual PE, then using the IP address of the virtual PE as tunnel destination address And the Ether frame is packaged as tunnel source address using the IP address of the 3rd provider edge equipment, encapsulate Message afterwards carries a VPLS labels, and it is a VPLS example allocations that a VPLS labels are the virtual PE VPLS labels, the tag types of a VPLS labels are that label is distributed in downstream, and the message after the encapsulation is sent to institute State a PE so that a PE receives the message after the encapsulation and decapsulated, and the message after decapsulation is turned Issue a CE；

6th transmitting element, for when the Ether frame is unknown destination's unicast Ether frame, multicast Ether frame or broadcasts ether During frame, if a VPLS examples adopt entrance copy mode, the Ether frame is replicated, quantity and institute is obtained State the multiple Ether frames of quantity identical of far-end PEs of the 3rd PE in a VPLS examples；To the plurality of ether Frame is packaged the message after obtaining multiple encapsulation respectively, wherein, the tunnel source address of the message after each described encapsulation is The IP address of the 3rd PE, during the tunnel destination address of the message after each described encapsulation is the far-end PE of the 3rd PE The IP address of one PE, the tunnel destination address of the message after the plurality of encapsulation are different；After the plurality of encapsulation Message is sent to corresponding far-end PE so that a PE receives the envelope of the IP address that tunnel destination address is the virtual PE Message after dress is simultaneously decapsulated, and the message after decapsulation is transmitted to a CE, wherein the tunnel destination Location is that the message after the encapsulation of the IP address of the virtual PE carries a VPLS labels, and a VPLS labels are the void Intend the VPLS labels that PE is a VPLS example allocations, the tag types of a VPLS labels are downstream distribution mark Sign；

7th transmitting element, for a PE be primary PE, the 2nd PE be standby PE, a PE be added to The corresponding multicast tree of first VPLS, and the Ether frame is unknown destination's unicast Ether frame, multicast Ether frame or wide When broadcasting Ether frame, if a VPLS examples adopt non-polymeric multicast tree mode, using corresponding group of a VPLS examples Broadcast the multicast ip address of tree as tunnel destination address and using the 3rd PE IP address as tunnel source address to institute State Ether frame to be packaged, the message after encapsulation is forwarded by multicast tree corresponding with a VPLS examples, is made Obtain a PE to receive the message after the encapsulation and decapsulated, and the message after decapsulation is transmitted to into described first CE；

8th transmitting element, for being primary PE as a PE, the 2nd PE is standby PE, and a PE is added to Multicast tree corresponding with a VPLS, and the Ether frame be unknown destination's unicast Ether frame, multicast Ether frame or During broadcast Ether frame, if a VPLS examples adopt aggregated multicast tree mode, using VPLS examples correspondence Multicast tree multicast ip address as tunnel destination address and using the 3rd PE IP address as tunnel source address The Ether frame is packaged, the message after encapsulation carries the 3rd VPLS labels, the 3rd VPLS labels are the described 3rd PE is the VPLS labels of a VPLS example allocations, and the tag types of the 3rd VPLS labels are that label is distributed in upstream, Message after the encapsulation is forwarded by multicast tree so that a PE receives the message after the encapsulation and carries out Decapsulation, and the message after decapsulation is transmitted to into a CE.

15. the 3rd provider edge equipments according to claim 13 or 14, it is characterised in that the 3rd operator side Edge equipment also includes：

3rd receiver module, the institute that any one or more the member PE for receiving in the virtual PE are issued by Routing Protocol State the corresponding route reachability information of IP address of virtual PE；

3rd receiver module, is additionally operable to receive the corresponding VPLS of the RG issued by the PE as primary PE The reachability information of example, the reachability information of the VPLS examples include the VPLS marks of the corresponding VPLS examples of the RG, The virtual PE is the IP address of the VPLS labels of the VPLS example allocations and the virtual PE.