CN102413060B - User private line communication method and equipment used in VPLS (Virtual Private LAN (Local Area Network) Service) network - Google Patents
User private line communication method and equipment used in VPLS (Virtual Private LAN (Local Area Network) Service) network Download PDFInfo
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Abstract
The invention discloses a user private line communication method and equipment used in a VPLS (Virtual Private LAN (Local Area Network) Service) network, and the method equipment disclosed by the invention are applied to a service provider edge (PE). The method comprises: creating a virtual forwarding instance and setting access circuits (ACs) and opposite-end equipment which belong to the virtual forwarding instance by the service PE; configuring at least two ACs in the virtual forwarding instance into a private line group, and generating a private line group forwarding table associated with the virtual forwarding instance and the private line group, wherein the private line group forwarding table comprises an interface corresponding to each AC in the private line group; receiving an Ethernet message; analyzing the AC by use of the input interface for the Ethernet message and the associated virtual forwarding instance so as to determine the private line group to which the AC belongs; searching the associated private line group forwarding table according to the virtual forwarding instance and the private line group to which the AC belongs; and forwarding the Ethernet message through the interfaces corresponding to the other ACs in the searched private line group forwarding table. By adopting the user private line communication method and equipment disclosed by the invention, point-to-point user private line communication can be realized in the VPLS network.
Description
Technical field
The present invention relates to communication technical field, relate in particular to user's special line communication method and apparatus in a kind of VPLS network.
Background technology
MPLS L2VPN provides (the Multi Protocol Label Switching based on MPLS, multiprotocol label switching) two-layer VPN (the Virtual Private Network of network, Virtual Private Network) service, make operator on unified MPLS network, provide the two-layer VPN based on different pieces of information link layer, comprise ATM (Asynchronous Transfer Mode, asynchronous transfer mode), FR (Frame Relay, frame relay), VLAN (Virtual Local Area Network, VLAN), Ethernet (Ethernet), PPP (Point-to-Point Protocol, point-to-point protocol) etc.MPLS L2VPN comprises VPLS (Virtual Private LAN Service, virtual special local area network service) and two kinds of technology of VLL (Virtual Lease Line, VLL).
VPLS is a kind of technology that virtual private ethernet bridging territory is provided in IP/MPLS network.Its principle is at each PE (Provider Edge, Provider Edge) between set up MPLS LSP (the Label Switch Path of full mesh, label forwarding path), two layers of ethernet frame are encapsulated by MPLS, exchange user's ethernet traffic is forwarded between each PE by MPLS, thereby set up the Ethernet VPN of a point-to-multipoint.
VLL refers to and in PSN (packet switching network), imitates as far as possible truly ATM, frame relay, Ethernet, low speed TDM (Time Division Multiplex, time division multiplexing) basic act of business and the one of the feature two layer service bearing technologies such as circuit, VLL is applicable to the networking application model of point-to-point.
VPLS technology is widely used in carrier network and enterprise network, as long as create VSI (Virtual Service Instance on the PE equipment in VPLS territory, virtual service instance) be leased to user, virtual service instance is to user and the conventional switch of making peace is identical, like this, user just can pass through MAN (Metropolitan Area Network, metropolitan area network) or WAN (Wide Area Network, wide area network) to realize oneself local area network (LAN) interconnected.
On the PE of operator equipment, need to be that each VSI creates MAC (Media Access Control, media interviews control) address table is in order to the mac address information of maintenance customer's side, the mac address table that enters into VSI after message that user's side enters is identified carries out source MAC study and target MAC (Media Access Control) address is searched, and carries out clean culture or broadcast forwarding according to the result of searching.The message that far-end public network side enters carries VC label, and PE equipment bullet falls in the mac address table that enters VSI after label, to carry out source MAC study and target MAC (Media Access Control) address is searched, according to result clean culture or the broadcasting packet searched.
The above-mentioned message repeating process need based on existing VPLS technology relies on mac address table, if user need to be between multiple access side (especially non-adjacent) directly must be rented in addition virtual circuit when point-to-point access, use VLL technology to carry out interconnected, existing VPLS network internal cannot be supported user's special line communication of point-to-point.
Summary of the invention
The invention provides user's special line communication method and apparatus in a kind of VPLS network, in order to realize user's special line communication of point-to-point in VPLS network.
User's special line communication method in VPLS network provided by the invention, the method is applied to Provider Edge equipment, this Provider Edge equipment creates Virtual Switch Instance and the place in circuit AC and the opposite equip. that belong to this Virtual Switch Instance is set, described method also comprises: at least two AC in described Virtual Switch Instance are configured to special line group, generation is associated with the special line group of Virtual Switch Instance described in this and described special line group and transmits, wherein, this special line group is transmitted and is comprised interface corresponding to each AC in special line group; Receive Ethernet message; By resolving incoming interface AC and the associated Virtual Switch Instance of described Ethernet message, determine the special line group that described AC is affiliated; According to the Virtual Switch Instance under described AC and special line group, search associated special line group and transmit; In transmitting by the special line group finding, forward described Ethernet message corresponding to the interface of other AC.
The present invention also provides a kind of user's special line communication method in VPLS network, the method is applied to Provider Edge equipment, this Provider Edge equipment creates Virtual Switch Instance and is that the AC and the opposite equip. that belong to this Virtual Switch Instance are set, wherein, by more than one AC of described Virtual Switch Instance and at least one opposite equip. configuration special line group, generation is associated with the special line group of Virtual Switch Instance and described special line group described in this and transmits, wherein, this special line group is transmitted interface corresponding to virtual link PW that comprises the interface that in special line group, each AC is corresponding and connect each opposite equip., the method further comprises: receive Ethernet message, by resolving incoming interface AC and the associated Virtual Switch Instance of described Ethernet message, determine the special line group that described AC is affiliated, according to the Virtual Switch Instance under described AC and special line group, search associated special line group and transmit, in transmitting by the special line group of searching, interface corresponding to other AC forwards described Ethernet message, and the interface corresponding to PW of each opposite equip. in transmitting by the special line group of searching, the Ethernet message of receiving is packaged into the virtual special local area network service VPLS message with corresponding outer layer label and corresponding vpn label, and for the VPLS message after each encapsulation arranges special line forwarding group mark, the VPLS message after each encapsulation is forwarded by interface corresponding to the PW of each opposite equip..
The present invention also provides user's special line communication device in a kind of VPLS network, be applied to the Provider Edge equipment of VPLS network, this device comprises: configuration module, for creating Virtual Switch Instance and the place in circuit AC and the opposite equip. that belong to this Virtual Switch Instance being set, at least two AC in described Virtual Switch Instance are configured to special line group; Generation is associated with the special line group of Virtual Switch Instance described in this and described special line group and transmits; Wherein, this special line group is transmitted and is comprised interface corresponding to each AC in special line group; Receiver module, for receiving Ethernet message; Processing module, for the incoming interface AC by resolving described Ethernet message and associated Virtual Switch Instance, determines the special line group that described AC is affiliated; According under described AC Virtual Switch Instance and special line group, search associated special line group and transmit; Sending module, transmits corresponding to the interface of other AC and forwards described Ethernet message for the special line group by finding.
The present invention also provides user's special line communication device in a kind of VPLS network, be applied to the Provider Edge equipment of virtual special local area network VPLS network, described device comprises: configuration module, for creating Virtual Switch Instance and for the place in circuit and the opposite equip. that belong to this Virtual Switch Instance are set, more than one place in circuit AC of described Virtual Switch Instance and at least one opposite equip. being configured to special line group; Generation is associated with the special line group of Virtual Switch Instance and described special line group described in this and transmits; Wherein, this special line group is transmitted interface corresponding to PW that comprises the interface that in special line group, each AC is corresponding and connect each opposite equip.; Receiver module, for receiving Ethernet message; Processing module, for the incoming interface AC by resolving described Ethernet message and associated Virtual Switch Instance, determines the special line group that described AC is affiliated; According to the Virtual Switch Instance under described AC and special line group, search associated special line group and transmit; The first sending module, transmits for the special line group by searching the interface that other AC are corresponding and forwards described Ethernet message; The second sending module, for transmit the interface corresponding to PW of each opposite equip. by the special line group of searching, the Ethernet message of receiving is packaged into the VPLS message with corresponding outer layer label and corresponding vpn label, and for the VPLS message after each encapsulation arranges special line forwarding group mark, the VPLS message after each encapsulation is forwarded by interface corresponding to the PW of each opposite equip..
Compared with prior art, the present invention by arranging special line group on edge device, its member AC is the AC that need to carry out point-to-point communication, and in the time that source edge device and destination edge device carry out message repeating, carry out message repeating according to the special line group membership AC of configuration, thereby realize point-to-point communication between special line group membership AC.
Brief description of the drawings
Fig. 1 is the VPLS network architecture schematic diagram in the embodiment of the present invention one;
Fig. 2 is the communication process schematic diagram between the local special line group membership AC in the embodiment of the present invention one;
Fig. 3 is the VPLS network architecture schematic diagram in the embodiment of the present invention two;
Fig. 4 is the communication process schematic diagram between the long-range special line group membership AC in the embodiment of the present invention two;
Fig. 5 is the form schematic diagram of the VPLS message in the embodiment of the present invention;
Fig. 6 is the heading information schematic diagram of the message in the embodiment of the present invention two while forwarding on each equipment;
Fig. 7 is the VPLS network architecture schematic diagram in the embodiment of the present invention three;
One of structural representation of user's special line communication device in the VPLS network that Fig. 8 provides for the embodiment of the present invention;
In the VPLS network that Fig. 9 provides for the embodiment of the present invention two of the structural representation of user's special line communication device.
Embodiment
The embodiment of the present invention is by configure user special line group on PE equipment, and tackle mutually message repeating flow process and improve, realize the user's special line technology in VPLS territory, expanded the access way of user's side AC (Attachment Circuit, place in circuit).
Below in conjunction with accompanying drawing, the embodiment of the present invention is described in detail.
Embodiment mono-
The present embodiment has been described the execution mode of realizing user's special line communication between the AC that is linked into same PE equipment under arbitrary VSI.
In the present embodiment, first on PE equipment, configure local special line group, the corresponding AC of two local CE (Custom Edge, user's border networks equipment) of its member for adopting user's private-line mode to communicate, between these two AC, mutually E-Packet, form user's special line.
Concrete, can in the VPLS of control plane example, create two AC, and the member AC (being called special line AC) that these two AC are same local special line group is set.Above-mentioned configuration can complete by static configuration mode.
For example, for the VPLS network architecture as shown in Figure 1, if the CE10 of the upper connection of PE1 and CE12 need to adopt user's private-line mode to communicate, wherein, CE10 is connected in PE1 by AC1, and CE12 is connected in PE1 by AC2, configure AC access in VSI on PE1 time, directly specify the switch-in attribute of corresponding AC (being AC1 and AC2) to be access via telephone line and to provide special line group number, between corresponding CE, create user's special line thereby realize.Concrete, can on PE1, configure as follows:
VPLS example of vsi vsi1 static//establishment, example is called vsi1
The signaling protocol of pwsignal ldp//appointment VPLS is LDP (Label Distribution Protocol, tag distribution protocol)
The ID of vsi-id 500//appointment VPLS example is 500
Service-instance 1//one of establishment AC, AC sequence number is 1
The packaged type of encapsulation private-line id 1 Qos 1//appointment AC is private-line mode, and special line ID is that 1, QOS attribute is 1
Xconnect vsi vsi1//this AC is tied to vsi1
Service-instance 2//one of establishment AC, AC sequence number is 2
The packaged type of encapsulation private-line id 1 Qos 2//appointment AC is private-line mode, and special line ID is that 1, QoS (Quality of Service, service quality) attribute is 2
Xconnect vsi vsi1//this AC is tied to vsi1
Wherein, be 2 by the QoS setup of attribute of AC1, represent when from AC1 receives message, the QoS priority of this message is set to 2, in like manner, is 1 by the QoS setup of attribute of AC2, represents when from AC2 receives message, and the QoS priority of this message is set to 1.In actual applications, can QoS property value be set according to service needed, for example, it is 1 or 2 that QoS property value is set, and wherein QoS property value is higher, and the QoS priority of the flow entering from this AC is just higher.QoS attribute is can arrangement.
By above-mentioned configuration, in the VPLS of control plane example, create two special line AC:AC1 and AC2, AC1 and AC2 belong to same local special line group, and this user's special line group identifies with special line ID, thereby between CE10 and CE12, forms user's special line.
Between member AC in local special line group, E-Packet according to the local special line group that is above-mentioned configuration, and do not rely on mac address table, therefore PE2 is upper except having configured the broadcast table of this VSI 1, the MAC table of VSI 1, the special line group that has also configured the special line group 1 of VSI 1 is transmitted, and this special line group is transmitted the interface of the AC1 that comprises special line group 1 and the interface of AC2.When PE2 receives Ethernet message by AC1 or AC2, the interface of another AC in this special line group is transmitted, as outgoing interface, forwards the Ethernet message of receiving, realizes in special line group and forwarding, need not carry out source MAC study and target MAC (Media Access Control) address inquiry, also can not cause the interior generation broadcast of VSI 1.
Based on above configuration, the flow process of carrying out the communication of user's private-line mode between the local AC on PE equipment can as shown in Figure 2, comprise:
Step 201, PE equipment receives Ethernet message;
Step 202, PE device parses place in circuit and associated Virtual Switch Instance and special line group;
Taking PE2 equipment in Fig. 1 as example, PE2 equipment receives after Ethernet message, conventionally, according to receiving the port of Ethernet message and the VLAN ID (VLAN ID) of Ethernet message, parses and receives that Ethernet message is AC1.PE2, according to the above-mentioned configuration of AC1, parses this AC1 and is associated with VSI 1 and special line group 1
Step 203, this PE equipment is transmitted according to the special line group of the coupling association of the Virtual Switch Instance of resolving and special line group.
Concrete, the PE2 in Fig. 1 can find special line group 1 and transmits according to resolving VSI 1 and special line group 1.
Step 204, forwards corresponding to the interface of other AC the Ethernet message of receiving during this PE transmits by the special line group finding.
Concrete, PE2 in Fig. 1 transmits the special line group of the special line group 1 of VSI 1 to comprise interface and interface corresponding to AC2 that AC1 is corresponding, therefore PE2 transmits interface that middle AC2 is corresponding as outgoing interface (receiving interface corresponding to other AC beyond the interface that the AC of Ethernet message is corresponding) using this special line group, forwards the Ethernet message of receiving by this outgoing interface.
The Ethernet message that in Fig. 1, PE2 equipment receives by AC1 so can not be forwarded to other AC or the PW (Pseudo Wire, virtual link) of VSI 1.
Further, the AC1 of the special line group 1 of VSI 1 and AC2 configure identical or different QoS attribute if, PE2 equipment also the QoS priority of this Ethernet message of receiving be set to the indicated priority of this QoS attribute.
In step 202, if PE2 equipment belongs to VSI 1 but does not belong to special line group 1 according to the place in circuit of resolving, PE2 forward this Ethernet message according to existing mode, first carry out source MAC inspection and study, mate again the interface that object MAC is corresponding (AC interface or PW interface), interface corresponding object MAC is defined as to outgoing interface, forwards the Ethernet message of receiving; Be the interface of object MAC corresponding A C, forward Ethernet message by the interface of this AC, if the corresponding PW interface of object MAC, according to outer layer label corresponding to this PW interface encapsulation and vpn label, generates VPLS message, VPLS is forwarded from outgoing interface.If PE2 in VSI 1 not study to object MAC, according to the broadcast table of VSI 1,, other AC interface and the PW interface outside receiving the interface of AC of Ethernet message is broadcasted this message.PE2 is generating the special line group 1 of VSI 1 and is transmitting the interface separately of the middle AC1 of record and AC2, can be not again AC1 and AC2 interface not separately be added to the broadcast table of VSI 1, does not receive the broadcast in VSI 1.
Although the present embodiment is only taking the setting of the special line group that is made up of two AC that are linked into same PE and forwarding as example, but those skilled in the art are according to the present embodiment content, in VSI, create in an identical manner multiple special line groups, each special line group comprises at least two AC and on PE2 equipment, is provided with unique special line ID, between the AC of different special line groups, can not mutually E-Packet.Communication process between the corresponding CE of member AC in the set-up mode of each local special line group and each local special line group, all can adopt aforesaid way to realize.
Further, in the local special line group configuring on PE equipment, also can comprise more than three member AC, in such cases, PE equipment is receiving message from local special line group membership AC incoming interface, adopt multicast mode, from the special line group membership AC of this this locality, the corresponding outgoing interface of other member AC except this message incoming interface AC forwards this message respectively, thereby in this this locality special line group, realizes the private-line mode communication of point-to-multipoint.Receive for ease of PE equipment after the Ethernet message of AC forwarding of special line group, at the Ethernet message that more than two on other AC, forwarding is received of special line group, can be further in the time of configuration special line group, for each AC of special line group arranges the pass-through mode of corresponding broadcast/multi broadcast.
Can find out by the embodiment of the present invention, the Ethernet message that PE equipment receives the AC of special line group does not do source MAC study and target MAC (Media Access Control) address is searched, only be forwarded to other AC of special line group, thereby both realized local user's special line communication, saved again the memory space of mac address table.The broadcasting packet that PE equipment receives for the AC beyond the special line group of VSI or unknown unicast message can not be broadcast to the AC of special line group, and the broadcasting packet entering for VSI public network side (PW) or unknown unicast message, can not be broadcast to special line AC side yet.So get rid of the service traffics of other AC outside special line group and public network side PW in VSI completely and be forwarded to the AC of special line group, thereby ensured to carry out flow intercommunication between the special line group AC of VSI.
Embodiment bis-
The present embodiment has been described under arbitrary VSI, is linked into the execution mode of realizing user's special line communication between the AC of different PE equipment.
In the present embodiment, first in special line group, on the PE of each AC access, configure respectively special line group.
For example, for the VPLS network architecture as shown in Figure 3, if the CE10 of the upper connection of PE1 need to adopt user's private-line mode to communicate with the CE40 being connected on PE4, wherein, CE10 is connected in PE1 by the local AC1 of PE1, CE40 is connected in PE2 by the local AC2 of PE2, configure AC access in VSI on PE1 time, configures as follows:
VPLS example of vsi vsi1 static//establishment, example is called vsi1
The signaling protocol of pwsignal ldp//appointment VPLS is LDP
The ID of vsi-id 500//appointment VPLS example is 500
Peer 4.4.4.4//appointment VPLS opposite end PE4
Peer 3.3.3.3//appointment VPLS opposite end PE3
Peer 6.6.6.6//appointment VPLS opposite end PE6
Service-instance 1//one of establishment AC, AC sequence number is 1
Encapsulation private-line global-id 1 qos 1 peer 4.4.4.4//specify the packaged type of this AC is overall private-line mode, and special line group ID is that 1, QoS attribute is 1, and this special line is clean culture and to specify opposite end be PE4.
Xconnect vsi vsi1//this AC is tied to vsi1
Based on above-mentioned configuration, PE1 has configured these VSI 500 broadcast tables and special line group 1 is transmitted, and this special line group 1 is transmitted the AC interface that comprises AC1 and PW interface corresponding to PW that connects PE4.VSI 1 broadcast table does not record the interface of special line group 1 in transmitting.
Configure AC access in VSI on PE4 time, configure as follows:
VPLS example of vsi vsi1 static//establishment, example is called vsi1
The signaling protocol of pwsignal ldp//appointment VPLS is LDP
The ID of vsi-id 500//appointment VPLS example is 500
Peer 1.1.1.1//appointment VPLS opposite end PE1
Peer 3.3.3.3//appointment VPLS opposite end PE3
Peer 6.6.6.6//appointment VPLS opposite end PE6
Service-instance 2//one of establishment AC, AC sequence number is 2
Encapsulation private-line global-id 1 qos 2 peer 1.1.1.1//specify the packaged type of this AC are overall private-line mode, and special line group ID is that 1, QoS attribute is 2, and this special line is clean culture and to specify opposite end be PE1
Xconnect vsi vsi1//this AC is tied to vsi1
PE4 is 2 by the QoS setup of attribute of the AC2 of this equipment of access, represents that the QoS priority of the flow accessing from this AC is set to 2.In actual applications, can QoS property value be set according to service needed, for example, it is 1 or 2 that QoS property value is set, and wherein QoS property value is higher, and the QoS priority of the flow entering from this AC is just higher.QoS attribute is can arrangement.
PE4 is upper to be transmitted except the broadcast table and the special line group 1 that have configured this VSI 500, and this special line group 1 is transmitted the interface PW interface corresponding with the PW that is connected PE1 that comprises AC2.
Therefore the embodiment of the present invention is improved the message repeating handling process on source and destination PE equipment, the Ethernet message that AC side enters from special line group can forward at other AC of special line group and all PW, the VPLS message entering from the PW side of special line group can forward at all AC of special line group, forbids source MAC study and target MAC (Media Access Control) address inquiry (as realized by MAC address learning function and the Bridge function of closing on special line AC interface).While wherein carrying out VPLS message repeating on PW, be that Ethernet message encapsulates beyond corresponding tunnel label and VC label according to PW interface corresponding to the PW of peer end of the connection PE, also the identification information of affiliated long-range special line group to be encapsulated in VPLS message, so that destination PE equipment is according to this long-range special line group mark.Carry out the message repeating in special line group.
Based on above configuration, the flow process of carrying out the communication of user's private-line mode at PE equipment room can be as shown in Figure 4.This flow process mainly comprises:
Step 401, PE equipment is received Ethernet message from AC side joint;
Step 402, PE device parses is received AC and associated Virtual Switch Instance and the special line group of this message.,, by resolving incoming interface AC and the associated Virtual Switch Instance of described Ethernet message, determine the special line group that described AC is affiliated;
Step 403, this PE equipment is searched associated special line group according to the Virtual Switch Instance of resolving with special line group and is transmitted;
Step 404, this PE equipment transmit according to the special line group of searching in interface corresponding to other AC forward the Ethernet message of receiving and interface corresponding to PW that connects each opposite equip., the Ethernet message encapsulation of receiving is there is to the VPLS message of corresponding outer layer label and corresponding vpn label, and forward mark for the VPLS message after encapsulation arranges special line, the VPLS message after encapsulation is forwarded by interface corresponding to PW that connects each opposite equip.;
Wherein, carrying the message encapsulation format of long-range special line group identification information can be as shown in Figure 5.As shown in the figure, the present embodiment is expanded the control word in VPLS message.Concrete, use original Sequence number (sequence number) field carrying special line group id information, Rsvd reserved field is expanded to its last reservation bit, this bit is set to Z mark (represent in this VPLS message carry long-range special line group ID), reduce by a bit by original reserved field, Flags field is increased to a bit.
It should be noted that, the VPLS message format shown in Fig. 5 is only a kind of example, as long as make it carry long-range special line group mark by expansion VPLS message, and all should be within protection scope of the present invention.
Further, the AC that the incoming interface of this message is corresponding is if provided with QoS attribute, PE equipment also the QoS priority of this message be set to the indicated priority of this QoS attribute.As can be, by QoS best property of attribute mapping in the EXP field of message, so just the QoS attribute of the upper AC side of source PE be carried in far-end PE.
Step 405, opposite end PE equipment receives this VPLS message from PW;
Step 406, the special line group of resolving VPLS message forwards mark and associated Virtual Switch Instance and special line group;
According to the form of the VPLS message shown in Fig. 5, whether this opposite end PE equipment can carry long-range special line group mark according to this message of Z marker for judgment of Rsvd reserved field.
Step 407, outer layer label and the vpn label of decapsulation VPLS message;
Step 408, according to Virtual Switch Instance and the special line group of resolving search associated special line group transmit in each AC corresponding interface, the Ethernet message after forwarding decapsulation.
Concrete, if this opposite end PE4 equipment judges that carrying long-range special line group in this message identifies, not carrying out source MAC study and target MAC (Media Access Control) address searches, but according to the form of the VPLS message shown in Fig. 5, this opposite end PE4 device parses goes out the special line group ID of Sequence number field carrying, then determine according to the long-range special line group configuring on this PE equipment the local AC that belongs to this special line group ID, inquire about the outgoing interface that this AC is corresponding, and the message that bullet is fallen to VC label and remove long-range special line group mark is transmitted to local CE from this outgoing interface.If this opposite end PE4 does not find the local special line AC of this special line group, process according to default policy, as abandon this message.
In step 402, if not parsing special line group, PE1 equipment forwards mark, adopt existing mode to forward in public network side and/or local side.
In step 405, if not parsing special line group, this opposite end PE4 equipment forwards mark, adopt existing mode, forward this message in this locality.Carrying out corresponding source MAC study and target MAC (Media Access Control) address searches.When inquiring after corresponding outgoing interface according to the target MAC (Media Access Control) address of this message, forward this message from this outgoing interface.If do not inquire corresponding outgoing interface, according to horizontal partition principle, only forward in this locality.。
In a VSI example, special line group can be set, in each special line group, on PE equipment, there is unique special line ID, in each special line group, at least comprise two AC that are linked into above different PE equipment, but can not mutually E-Packet between the AC of the different special line groups of identical VSI.Communication process between the corresponding CE of member AC in the set-up mode of each special line group and each special line group, all can adopt aforesaid way to realize.
The broadcasting packet or the unknown unicast message that enter for other AC sides that ensure in VSI can not be broadcast to special line AC side, and in VSI, the broadcasting packet or the unknown unicast message that enter of public network side can not be broadcast to special line AC side, in the broadcast table of the embodiment of the present invention in VSI, do not comprise special line AC node.Concrete, in the embodiment of the present invention, VPLS key-course is in the time creating the common AC (being non-special line AC) of VPLS example, in the broadcast table of this VSI example, increase this AC node, and in the time creating the special line AC of VPLS example, do not revise the broadcast table of this VSI example, can in the broadcast table of VSI example, not add this special line AC node.
Further, in the special line group configuring on a PE equipment, also can comprise two above local member AC.In such cases:
When PE equipment receives message from the incoming interface AC of special line group, if the special line group inquiring under this incoming interface AC comprises two above local AC, the outgoing interface that also other the local member AC except the incoming interface AC of this message from this special line group is corresponding by message forwards;
In the time that PE equipment receives from PW side joint the message that carries special line group mark, comprise two above local member AC if inquire corresponding special line group, adopt multicast mode, by the message of removing after VC label and special line group mark, the outgoing interface that the local member AC from this special line group is corresponding respectively forwards.
By above flow process, realize user's private-line mode communication of carrying out point-to-multipoint between the member AC that belongs to same special line group on two PE equipment.
Taking the VPLS network architecture shown in Fig. 3 as example, such as the AC2 on the AC1 on PE1 equipment and PE2 equipment is configured to the special line AC of same special line group.The user's message entering from AC1, PE1 obtains incoming interface attribute (being the aforementioned information configuring carry out in VSI access configuration on PE1 time) according to the incoming interface of this message, be message in special line group (as encapsulation private-line global-id 1 qos 1peer 4.4.4.4) because this incoming interface attribute-bit goes out this message, PE1 obtains special line group ID (global-id 1), VC label and public network outgoing interface information, packaging V C label in message, special line group mark and public network tunnel header information, then by this message repeating to public network side PW, when forwarding on public network, message carries out label exchange according to the tunnel label of public network head, finally arrive opposite end PE equipment PE2.What PE2 received is the VPLS message that carries VC label and special line group ID, PE2 sends PE end according to the VPLS example under this message of VC tag recognition and message source, according to the special line group under internal layer special line group ID identification message, search identifying source MAC study and the target MAC (Media Access Control) address forbidding carrying out after message belongs to special line group in VSI, but the special line group of directly safeguarding according to this PE2 finds the special line AC in group, and the message repeating of having peeled public network head, VC label and special line group ID off is arrived to outgoing interface corresponding to this special line AC.
In above-mentioned flow process, heading information when message forwards on each equipment can be as shown in Figure 6.Wherein, what PE1 received from user's side joint is two layers of Ethernet message of user, packed VC label and Tunnel label (the public network tunnel label gone up of message enter public network after VPLS forwards time, as the Tunnel in figure), if user's side is the special line AC of special line group, after VC label, also can carry control word (CtrlWord), the Sequence Number of this control word is used for identifying special line group ID.PE4 receives after this message, removes VC label and Tunnel label, is also packaged with the control word of carrying special line group ID at this message, also will remove this control word, then this message repeating is arrived to local AC side.
In like manner, PE4 receives after the message that CE40 sends, and with leased-line communication method by this message repeating to the process of the CE10 of PE1 similarly, does not repeat them here.
Can find out by the embodiment of the present invention, the message entering from an access via telephone line AC side on the PE equipment of source can be forwarded to private-line mode the opposite end special line AC object PE equipment, and source messages is not done to source MAC study and target MAC (Media Access Control) address is searched, thereby both realized user's special line communication, saved again the memory space of mac address table.The broadcasting packet or the unknown unicast message that enter for other AC sides in VSI can not be broadcast to special line AC side, for broadcasting packet or unknown unicast message that in VSI, public network side enters, can not be broadcast to special line AC side yet.So get rid of other AC outside special line AC and the service traffics of public network side PW completely and be forwarded to special line AC, thereby ensured to carry out flow intercommunication between special line AC.
Embodiment tri-
The present embodiment has been described under arbitrary VSI, is linked into the execution mode of realizing user's special line communication between the AC of different PE equipment, wherein more than two the special line AC access of special line group.
The scene that this embodiment is suitable for is, in VPLS example, sometimes need in specific group, carry out unconditional broadcast to reach the object of data backup, and access AC in these groups is not the common AC of example, may be the special AC access device that articulates server.
In order to realize the utilization of this scene, the present embodiment can be special line group customization broadcast service, and the message in special line group can be broadcast to all members in group.
Taking the VPLS network architecture shown in Fig. 7 as example, if among the CE60 and CE61 of the upper connection of CE40, PE6 of the upper connection of CE30, PE4 of the upper connection of CE10, PE3 of the upper connection of PE1, if the message that has a CE to send need to be received by other CE, carry out configuring in VSI AC access on these PE equipment time, create special line group, the AC member of this special line group is more than 2, but comprises the corresponding AC of above-mentioned each CE.In order to differentiate with previous embodiment, in the present embodiment, the special line group of broadcast type is called to broadcast special line group, the special line group of broadcast type is distinguished to some extent with the special line group of unicast type in configuration, concrete, taking PE6 as example, CE60 accesses PE6 by AC1, and CE61 accesses PE6 by AC2, can on PE6, configure as follows:
VPLS example of vsi vsi1 static//establishment, example is called vsi1
The signaling protocol of pwsignal ldp//appointment VPLS is LDP
The ID of vsi-id 500//appointment VPLS example is 500
Peer 4.4.4.4//appointment VPLS opposite end PE4
Peer 3.3.3.3//appointment VPLS opposite end PE3
Peer 1.1.1.1//appointment VPLS opposite end PE1
Service-instance 1//one of establishment AC, AC sequence number is 1
The packaged type of encapsulation private-line global-id 1 qos 1 broadcast//appointment AC is overall private-line mode, and special line group ID is that 1, QoS attribute is 1, and this special line is broadcast type, and acquiescence will be in all opposite ends broadcast of VPLS
Xconnect vsi vsi1//this AC is tied to vsi1
Service-instance 2//one of establishment AC, AC sequence number is 2
The packaged type of encapsulation private-line global-id 1qos 1 broadcast//appointment AC is overall private-line mode, and special line group ID is that 1, QoS attribute is 1, and this special line is broadcast type, and acquiescence will be in all opposite ends broadcast of VPLS
Xconnect vsi vsi1//this AC is tied to vsi1
Wherein, QoS attribute is can arrangement, represents to be set to the indicated priority of this QoS attribute from the QoS priority of the flow of corresponding AC access.
By AC1 and AC2 are broadcasted in VSI, all opposite equip.s in AC1 and AC and VSI can be arranged to a special line group, can also, according to the mode of embodiment bis-, respectively all opposite equip.s of AC1 and AC and embodiment be arranged to a special line group.
In like manner, on other PE equipment, carry out similar configuration, the special line ID of the broadcast special line group configuring on each PE equipment is identical, but the opposite equip. in the special line group of the upper configuration of each PE can comprise all opposite equip.s, can also only comprise part opposite equip..By above-mentioned configuration, in the VPLS of control plane example, create several special lines AC, respectively on different PE equipment, but the VSI broadcast table that belongs to these PE equipment configurations of same special line group is transmitted similar with embodiment bis-to embodiment mono-with VSI special line.
For example, for the configuration requirement of the group-network construction shown in Fig. 7 and special line group, the broadcast special line group that is 1 corresponding to special line group ID, the special line group broadcast table configuring on each PE equipment thes contents are as follows:
PE1: comprise the AC that connects local EC10, connect the PW of PE2, connect the PW of PE6;
PE3: comprise the AC that connects local EC30, connect the PW of PE1, connect the PW of PE4;
PE4: comprise the AC that connects local EC40, connect the PW of PE3, connect the PW of PE5;
PE6: comprise the AC that connects local EC60, connect the AC of local EC61, connect the PW of PE1.
Configuration with the VPLS network architecture shown in Fig. 7 and above-mentioned special line group (is PE1, PE3, PE4, on PE6 and PE5, all there is VPLS example, wherein PE1, PE3, on PE4 and PE6, all there is broadcast special line group AC, these special lines AC belongs to same broadcast special line group) be example, in the time that the special line AC example (CE10 equipment) on PE1 enters broadcasting packet, PE1 will forward in special line class range, all PE equipment that has created this VPLS example all can receive message, this message and unicast message form are above similar, VC label and control word information (in control word, carrying broadcast special line group ID) are all carried.PE3, PE4, PE5 and PE6 receive after this message, and bullet falls VC label and identifies control word, E-Packets in this locality according to control word.In VPLS example due to PE3 equipment, have a special line group AC, traffic forwarding is given this special line AC (CE30) by PE3; On PE4 equipment, there is a special line group AC, traffic forwarding is given this special line AC (CE40) by PE4, although it should be noted that the upper access AC (as CE41) that has other of PE4, do not belong to special line group AC, therefore flow can not be forwarded to CE41; PE5 is upper without dropping packets of special line group AC; Two special line group AC of the upper existence of PE6, therefore can copy respectively flow to CE60 and CE61.
Can find out by the embodiment of the present invention, the message entering from an access via telephone line AC side on the PE equipment of source can be broadcast to private-line mode the opposite end special line AC the each object PE equipment in same broadcast special line group, and source messages is not done to source MAC study and target MAC (Media Access Control) address is searched, thereby both realized broadcast special line communication, saved again the memory space of mac address table.The broadcasting packet or the unknown unicast message that enter for other AC sides in VSI can not be broadcast to special line AC side, for broadcasting packet or unknown unicast message that in VSI, public network side enters, can not be broadcast to special line AC side yet.So got rid of other AC outside special line AC and the service traffics of public network side PW completely and be forwarded to special line AC, thereby ensureing to only have between two special line AC carries out flow intercommunication.
Based on identical technical conceive, the embodiment of the present invention also provides user's special line communication device in the VPLS network that can be applicable to above-mentioned flow process.
Referring to Fig. 8, the structural representation of user's special line communication device in the VPLS network that is applicable to embodiment mono-providing for the embodiment of the present invention, as shown in the figure, in this VPLS network, user's special line communication application of installation is in the Provider Edge equipment of VPLS network, and this device comprises:
Configuration module 801, for creating Virtual Switch Instance and the place in circuit AC and the opposite equip. that belong to this Virtual Switch Instance being set, is configured to special line group by least two AC in described Virtual Switch Instance; Generation is associated with the special line group of Virtual Switch Instance described in this and described special line group and transmits; Wherein, this special line group is transmitted and is comprised interface corresponding to each AC in special line group;
Receiver module 802, for receiving Ethernet message;
Processing module 803, for the incoming interface AC by resolving described Ethernet message and associated Virtual Switch Instance, determines the special line group that described AC is affiliated; According under described AC Virtual Switch Instance and special line group, search associated special line group and transmit;
Sending module 804, transmits corresponding to the interface of other AC and forwards described Ethernet message for the special line group by finding.
Further, configuration module 801 is also used to each AC of special line group to configure identical Qos attribute; Or configure different Qos attributes for each AC of special line group.
Further, processing module 803, also for the QoS attribute of the incoming interface AC of the Ethernet message that receives according to receiver module, arranges the QoS priority of described Ethernet message.
Referring to Fig. 9, the structural representation of user's special line communication device in the VPLS network that is applicable to embodiment bis-or embodiment tri-providing for the embodiment of the present invention.This application of installation is in the Provider Edge equipment of virtual special local area network VPLS network, and this device comprises:
Configuration module 901, for creating Virtual Switch Instance and for the place in circuit and the opposite equip. that belong to this Virtual Switch Instance are set, more than one place in circuit AC of described Virtual Switch Instance and at least one opposite equip. being configured to special line group; Generation is associated with the special line group of Virtual Switch Instance and described special line group described in this and transmits; Wherein, this special line group is transmitted interface corresponding to PW that comprises the interface that in special line group, each AC is corresponding and connect each opposite equip.;
Receiver module 902, for receiving Ethernet message;
Processing module 903, for the incoming interface AC by resolving described Ethernet message and associated Virtual Switch Instance, determines the special line group that described AC is affiliated; According to the Virtual Switch Instance under described AC and special line group, search associated special line group and transmit;
The first sending module 904, transmits for the special line group by searching the interface that other AC are corresponding and forwards described Ethernet message;
The second sending module 905, for transmit the interface corresponding to PW of each opposite equip. by the special line group of searching, the Ethernet message of receiving is packaged into the VPLS message with corresponding outer layer label and corresponding vpn label, and for the VPLS message after each encapsulation arranges special line forwarding group mark, the VPLS message after each encapsulation is forwarded by interface corresponding to the PW of each opposite equip..
Further, receiver module 902 is also for receiving VPLS message; Accordingly, processing module 903 also forwards mark and associated Virtual Switch Instance for the special line group by resolving described VPLS message, determines corresponding special line group, outer layer label and the vpn label of decapsulation VPLS message; The first sending module 904 is according to the Virtual Switch Instance under described VPLS message and special line group, search associated special line group transmit in interface corresponding to each AC, forward the Ethernet message after decapsulation according to the interface finding.
Further, configuration module 901 is also used to each AC of special line group to configure identical Qos attribute; Or configure different Qos attributes for each AC of special line group.
Further, processing module 903 also, for the QoS attribute of the incoming interface AC of the Ethernet message that receives according to described receiver module, arranges QoS priority to be E-Packeted.
In sum, the embodiment of the present invention has been expanded the AC access in VSI, has realized in VSI and has supported user's special line, for user provides virtual access function more flexibly.
Through the above description of the embodiments, those skilled in the art can be well understood to the mode that the present invention can add essential general hardware platform by software and realize, and can certainly pass through hardware, but in a lot of situation, the former is better execution mode.Based on such understanding, the part that technical scheme of the present invention contributes to prior art in essence in other words can embody with the form of software product, this computer software product is stored in a storage medium, comprise that some instructions (can be mobile phones in order to make a station terminal equipment, personal computer, server, or the network equipment etc.) carry out the method described in each embodiment of the present invention.
The above is only the preferred embodiment of the present invention; it should be pointed out that for those skilled in the art, under the premise without departing from the principles of the invention; can also make some improvements and modifications, these improvements and modifications also should be looked protection scope of the present invention.
Claims (14)
1. user's special line communication method in a virtual special local area network service VPLS network, the method is applied to Provider Edge equipment, this Provider Edge equipment creates Virtual Switch Instance and the place in circuit AC and the opposite equip. that belong to this Virtual Switch Instance is set, it is characterized in that, described method also comprises: at least two AC in described Virtual Switch Instance are configured to special line group, generation is associated with the special line group of Virtual Switch Instance described in this and described special line group and transmits, wherein, this special line group is transmitted and is comprised interface corresponding to each AC in special line group,
Receive Ethernet message;
By resolving incoming interface AC and the associated Virtual Switch Instance of described Ethernet message, determine the special line group that described AC is affiliated;
According to the Virtual Switch Instance under described AC and special line group, search associated special line group and transmit;
In transmitting by the special line group finding, forward described Ethernet message corresponding to the interface of other AC.
2. the method for claim 1, is characterized in that, the described step that at least two AC in described Virtual Switch Instance are configured to special line group also comprises:
For each AC of special line group configures identical Qos attribute; Or
For each AC of special line group configures different Qos attributes.
3. method as claimed in claim 2, is characterized in that, before forwarding the step of described Ethernet message, described method further comprises: the QoS priority of the described Ethernet message of receiving according to the QoS setup of attribute of the described AC resolving.
4. user's special line communication method in VPLS network, the method is applied to Provider Edge equipment, and this Provider Edge equipment creates Virtual Switch Instance and the AC and the opposite equip. that belong to this Virtual Switch Instance is set, it is characterized in that,
More than one AC and at least one opposite equip. of described Virtual Switch Instance are configured to special line group, generation is associated with the special line group of Virtual Switch Instance and described special line group described in this and transmits, wherein, this special line group is transmitted interface corresponding to virtual link PW that comprises the interface that in special line group, each AC is corresponding and connect each opposite equip.; The method further comprises:
Receive Ethernet message;
By resolving incoming interface AC and the associated Virtual Switch Instance of described Ethernet message, determine the special line group that described AC is affiliated;
According to the Virtual Switch Instance under described AC and special line group, search associated special line group and transmit;
In transmitting by the special line group of searching, interface corresponding to other AC forwards described Ethernet message, and the interface corresponding to PW of each opposite equip. in transmitting by the special line group of searching, the Ethernet message of receiving is packaged into the virtual special local area network service VPLS message with corresponding outer layer label and corresponding vpn label, and for the VPLS message after each encapsulation arranges special line forwarding group mark, the VPLS message after each encapsulation is forwarded by interface corresponding to the PW of each opposite equip..
5. method according to claim 4, is characterized in that, described method further comprises:
Receive VPLS message;
Forward mark and associated Virtual Switch Instance by resolving the special line group of described VPLS message, determine corresponding special line group;
The outer layer label of VPLS message and vpn label described in decapsulation;
According to the Virtual Switch Instance under described VPLS message and special line group, search associated special line group transmit in interface corresponding to each AC, forward the Ethernet message after decapsulation according to the interface that finds.
6. method as claimed in claim 4, is characterized in that, the described step by least one place in circuit AC of described Virtual Switch Instance and at least one opposite equip. configuration special line group also comprises:
For each AC of special line group configures identical Qos attribute; Or
For each AC of special line group configures different Qos attributes.
7. method as claimed in claim 4, it is characterized in that, before the step of the Ethernet message that described forwarding is received, or before the described interface that the PW by each opposite equip. is corresponding by the VPLS message after each encapsulation forwards, described method further comprises: the QoS priority of the described Ethernet message of receiving according to the QoS setup of attribute of the described place in circuit of identification.
8. user's special line communication device in VPLS network, is applied to the Provider Edge equipment of VPLS network, it is characterized in that, this device comprises:
Configuration module, for creating Virtual Switch Instance and the place in circuit AC and the opposite equip. that belong to this Virtual Switch Instance being set, is configured to special line group by least two AC in described Virtual Switch Instance; Generation is associated with the special line group of Virtual Switch Instance described in this and described special line group and transmits; Wherein, this special line group is transmitted and is comprised interface corresponding to each AC in special line group;
Receiver module, for receiving Ethernet message;
Processing module, for the incoming interface AC by resolving described Ethernet message and associated Virtual Switch Instance, determines the special line group that described AC is affiliated; According to the Virtual Switch Instance under described AC and special line group, search associated special line group and transmit;
Sending module, transmits corresponding to the interface of other AC and forwards described Ethernet message for the special line group by finding.
9. device as claimed in claim 8, is characterized in that, described configuration module is also used to each AC of special line group to configure identical Qos attribute; Or configure different Qos attributes for each AC of special line group.
10. device as claimed in claim 8, is characterized in that, described processing module, also for the QoS attribute of the incoming interface AC of the Ethernet message that receives according to described receiver module, arranges the QoS priority of described Ethernet message.
User's special line communication device in 11. 1 kinds of VPLS networks, is applied to the Provider Edge equipment of virtual special local area network service VPLS network, it is characterized in that, described device comprises:
Configuration module, for creating Virtual Switch Instance and for the place in circuit and the opposite equip. that belong to this Virtual Switch Instance are set, more than one place in circuit AC of described Virtual Switch Instance and at least one opposite equip. being configured to special line group; Generation is associated with the special line group of Virtual Switch Instance and described special line group described in this and transmits; Wherein, this special line group is transmitted interface corresponding to PW that comprises the interface that in special line group, each AC is corresponding and connect each opposite equip.;
Receiver module, for receiving Ethernet message;
Processing module, for the incoming interface AC by resolving described Ethernet message and associated Virtual Switch Instance, determines the special line group that described AC is affiliated; According to the Virtual Switch Instance under described AC and special line group, search associated special line group and transmit;
The first sending module, transmits for the special line group by searching the interface that other AC are corresponding and forwards described Ethernet message;
The second sending module, for transmit the interface corresponding to PW of each opposite equip. by the special line group of searching, the Ethernet message of receiving is packaged into the VPLS message with corresponding outer layer label and corresponding vpn label, and for the VPLS message after each encapsulation arranges special line forwarding group mark, the VPLS message after each encapsulation is forwarded by interface corresponding to the PW of each opposite equip..
12. devices according to claim 11, is characterized in that, receiver module, also for receiving VPLS message;
Processing module, also forwards mark and associated Virtual Switch Instance for the special line group by resolving described VPLS message, determines corresponding special line group; Outer layer label and the vpn label of decapsulation VPLS message;
The first sending module, according to the Virtual Switch Instance under described VPLS message and special line group, search associated special line group transmit in interface corresponding to each AC, forward the described VPLS message after decapsulation according to the interface that finds.
13. devices according to claim 11, is characterized in that, described configuration module is also used to each AC of special line group to configure identical Qos attribute; Or configure different Qos attributes for each AC of special line group.
14. devices as claimed in claim 11, is characterized in that, described processing module also, for the QoS attribute of the incoming interface AC of the Ethernet message that receives according to described receiver module, arranges QoS priority to be E-Packeted.
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| CN103795634B (en) * | 2012-11-01 | 2019-02-05 | 中兴通讯股份有限公司 | A kind of generation method and device of forwarding table |
| CN104734930B (en) * | 2013-12-19 | 2020-06-23 | 中兴通讯股份有限公司 | Method and device for realizing access of Virtual Local Area Network (VLAN) to Variable Frequency (VF) network and Fiber Channel Frequency (FCF) |
| CN103795630B (en) * | 2014-01-15 | 2017-10-17 | 新华三技术有限公司 | The message transmitting method and device of a kind of label exchange network |
| CN105122776B (en) | 2014-01-20 | 2019-01-18 | 华为技术有限公司 | Address acquiring method and network virtualization edge device |
| CN104363157A (en) * | 2014-08-26 | 2015-02-18 | 杭州华三通信技术有限公司 | Message forwarding method and equipment for Ethernet virtualization interconnecting network |
| CN104639442A (en) * | 2015-02-16 | 2015-05-20 | 杭州华三通信技术有限公司 | Message processing method and message processing device |
| CN109936503B (en) * | 2017-12-15 | 2021-04-23 | 上海诺基亚贝尔股份有限公司 | Mesh VPWS system based on EVPN and method and equipment for establishing mesh VPWS instance |
| CN108322338B (en) * | 2018-01-23 | 2021-02-26 | 新华三技术有限公司 | Broadcast suppression method and VTEP device |
| CN108777654B (en) * | 2018-09-18 | 2020-12-29 | 深圳市风云实业有限公司 | Message forwarding method and routing equipment |
| CN109495370B (en) * | 2018-12-29 | 2020-11-24 | 瑞斯康达科技发展股份有限公司 | Message transmission method and device based on VPLS |
| CN109617814B (en) * | 2019-01-11 | 2021-07-27 | 安徽皖兴通信息技术有限公司 | Method for forwarding packet access network policy |
| CN113726633B (en) * | 2021-08-12 | 2023-04-07 | 中国联合网络通信集团有限公司 | Forwarding method and forwarding device |
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