CN102355424A

CN102355424A - Method and system for implementation of interworking forwarding of MIM (MAC-in-MAC) and VPLS (Virtual Private Local Area Network Service)

Info

Publication number: CN102355424A
Application number: CN2011103199352A
Authority: CN
Inventors: 陈振光
Original assignee: Digital China Networks Beijing Co Ltd
Current assignee: Digital China Networks Beijing Co Ltd
Priority date: 2011-10-20
Filing date: 2011-10-20
Publication date: 2012-02-15
Anticipated expiration: 2031-10-20
Also published as: CN102355424B

Abstract

The invention discloses a method and a system for implementation of interworking forwarding of MIM (MAC-in-MAC) and VPLS (Virtual Private Local Area Network Service). The method comprises the following steps that: (1) when the data from an MIM network leaves a network edge device, an outer layer head of the MIM data is stripped, and then a VPLS outer layer head is packaged into a VPLS network; and (2) the data from the VPLS network leaves the network edge device, an outer layer head of the VPLS data is stripped, and then an MIM outer layer head is packaged into the MIM network. Meanwhile, the invention also discloses a system for implementing the method. The method and the system, disclosed by the invention, can implement the intercommunication between users connected to the MIM network and users connected to the VPLS network without re-spending cost to build a new network, accordingly, the layout cost is saved, a flexible and convenient choice is provided to the network layout for operators, and the interests of customers and the needs of different levels are ensured.

Description

A kind of method and system that realize that MIM and VPLS intercommunication are transmitted

Technical field

The present invention relates to network communications technology field, relate to the method and system that a kind of MIM of realization and VPLS intercommunication are transmitted.

Background technology

MIM, i.e. MAC-in-MAC, provider backbone bridging agreement; MIM is a kind of Layer 2 virtual private network technology, and its nested through MAC Address is encapsulated in user's MAC among the MAC of operator; MAC isolates as internal layer, thereby has strengthened the autgmentability and the service security property of Ethernet; Solve the restriction that the service supplier only shares with 4096 VLAN, expanded the MAC Address space;

VPLS (Virtual Private LAN Service, private virtual lan is professional) is a kind of a kind of business that similar local area network (LAN) is provided on the VPLS network, is actually a kind of Layer 2 virtual private network technology based on Ethernet.VPLS makes the user network that is dispersed on the diverse geographic location can mutual communication, just as they directly interconnect.VPLS uses Ethernet interface in user oriented net one side, has simplified the local area network (LAN) border, can support fast and the flexible services deployment; Give the user with the routing policy control of user network and the right of safeguarding, simplified the management of carrier network; All users in the territory are parts of same subnet, have simplified the planning of IP address, and the VPLS service need not participated in IP addressing and route.

Intercommunication is transmitted and is meant that operator realizes communication with the user who connects two heterogeneous networks territories in the network; Under normal circumstances, the user in the MIM network domains only can with the telex network in the present networks, the user also is like this in the same VPLS network; But telex network in user in the MIM network domains and the VPLS network if desired; And these two kinds of users so just need operator to remove new network of layout more not in same place, can cause great waste like this; And, also need the outer cost of commitment to the client; On switch, realize the intercommunication retransmission technique; Make operator on the basis of existing network layout; To connect the telex network in two heterogeneous networks territories, select easily flexibly, guaranteed client's the interests and the demand of different levels for the carrier network layout provides a kind of; How to realize connecting the user and the user's mutual communication that is connected the VPLS network of MIM network, reduce expense and the cost of Virtual network operator aspect network topology, this is a major reason that realizes that on switch MIM and VPLS intercommunication are transmitted.

Summary of the invention

The object of the invention provides the method and system of a kind of MIM of realization and VPLS intercommunication forwarding; Can allow the user who connects the MIM network realize mutual communication with the user who is connected the VPLS network; For the carrier network layout provides reliable guarantee more, provide a kind of and select easily flexibly.

The present invention realizes above-mentioned purpose through following scheme:

A kind of method that realizes that MIM and VPLS intercommunication are transmitted may further comprise the steps:

(1) data of coming from the MIM network are peeled the outer head of MIM data off when the deviated from network edge device, and the outer head of packaging V PLS gets into the VPLS network again;

(2) data of coming from the VPLS network are peeled the outer head of VPLS data off when the deviated from network edge device, encapsulate the outer head of MIM again and get into the MIM network.

Wherein, said step (1) further comprises:

A) obtain Virtual Switch Instance according to the MIM header;

B) search in the purpose MAC of layer data, find data according to Virtual Switch Instance and purpose MAC and go out virtual port information;

C) go out virtual port information and find after, use out next jumping of appointment in the information, the outer head of data message packaging V PLS is got into the VPLS network.

Wherein, said step (2) further comprises:

A) obtain into virtual port information according to the VPLS header;

B) if find, further obtain Virtual Switch Instance into virtual port information;

C) search in the purpose MAC of layer data, find data according to Virtual Switch Instance and purpose MAC and go out virtual port information;

D) go out virtual port information and find after, use out next jumping of appointment in the information, data message is encapsulated the outer head of MIM gets into the MIM network.

The invention also discloses a kind of system that realizes that above-mentioned MIM and VPLS intercommunication are transmitted, this system comprises: MIM network, VPLS network, and the core switch BEB-PE of MIM network and VPLS network boundary; Wherein, also comprise in MIM network and the VPLS network: the network core switch, be used to be connected the network edge switch of ustomer premises access equipment, and the port A and the port B that is connected to VPLS network core switch that are connected respectively to MIM network core switch; Wherein, port A and port B are set in same Virtual Switch Instance, and port A and port B handle the message in the heterogeneous networks respectively.

Further, the outer head of data comprises in the said MIM network: outer purpose MAC, source MAC, outside VLAN and the I-TAG corresponding with Virtual Switch Instance; The outer head of data comprises in the VPLS network: outer purpose MAC, source MAC, outside VLAN and VPLS label.

The present patent application is on the edge device of MIM network and VPLS network boundary; By MIM network termination point and VPLS network termination point being set in same Virtual Switch Instance; The destination node of MIM network also is the initiation point of VPLS network; Otherwise the destination node of VPLS network also is the initiation point of MIM network; Allow the user who connects the MIM network realize mutual communication with the user who is connected the VPLS network; Needn't spend the new network of cost construction again; Save the layout cost; Select easily flexibly for the carrier network layout provides a kind of, guaranteed client's the interests and the demand of different levels.

Description of drawings

According to embodiment and accompanying drawing the present invention is done further explain below.

Fig. 1 is that physical link syndeton sketch map is transmitted in MIM and VPLS intercommunication;

Fig. 2 is the outer sketch map of MIM network and VPLS network boundary equipment two end datas;

Fig. 3 is that MIM network data according to the invention converts VPLS network data flow process figure to;

Fig. 4 is that VPLS network data according to the invention converts MIM network data flow process figure to.

Embodiment

Fig. 1 is that physical link syndeton sketch map is transmitted in MIM and VPLS intercommunication; As shown in Figure 1; Provided seven switch tunnel links syndeton sketch mapes: switch CE1 and CE2 are for being connected ustomer premises access equipment among Fig. 1; Edge switch BEB is the carrier network edge device; Core switch BCB is the MIM network core device; BEB-PE is the core switch that MIM network and VPLS network have a common boundary; Its port A is connected to MIM network core switch b CB, and port B is connected to VPLS network core switch P; PE is a VPLS network edge switch, and wherein, switch b EB-PE is the core that intercommunication is transmitted in the whole network.

Port A and port B on the switch b EB-PE handle the message in the heterogeneous networks respectively.

Switch b EB-PE handles the outer sketch map of heterogeneous networks data as shown in Figure 2, and the outer head of data comprises outer purpose MAC, source MAC, outside VLAN and I-TAG (corresponding with Virtual Switch Instance) in the MIM network; The outer head of data comprises outer purpose MAC, source MAC, outside VLAN and VPLS label in the VPLS network; Important is: port A and port B are set in same Virtual Switch Instance.

After the user data of CE1 gets into the MIM network, be encapsulated into the MIM message, behind the arrival BEB-PE equipment, the MIM network data converts VPLS network data processing flow process to as shown in Figure 3; After port A receives the MIM data message; According to the source MAC, outside VLAN and the I-TAG that carry in the outer head; Obtain Virtual Switch Instance information; Obtain VFI from the termination table, the peeling outer layer head is learnt internal layer source MAC (user's physical address of CE1 connection just) in Virtual Switch Instance simultaneously; While is according to the internal layer purpose MAC of Virtual Switch Instance and message; Search physical address table,, then directly obtain out virtual port if hit; If do not hit, on all corresponding virtual ports of Virtual Switch Instance, broadcast; From the corresponding next hop information of virtual port, the VPLS header that taking-up will encapsulate is packaged into the VPLS message then; Get into the VPLS network from port B, in this network, carry out VPLS and transmit; Arrive the user that CE2 connects at last, realized communicating by letter of the MIM network user and the VPLS network user;

After the user data of CE2 gets into the VPLS network, be encapsulated into the VPLS message, behind the arrival BEB-PE equipment, the VPLS network data converts MIM network data processing flow process to as shown in Figure 4; After port B received the VPLS data message, the label information according to carrying in the outer head obtained the source virtual port from the termination table, peels off the VPLS heading; According to source virtual port corresponding virtual forwarding instance information; Study internal layer source MAC (user's physical address of CE2 connection just) in Virtual Switch Instance; Simultaneously according to the internal layer purpose MAC of Virtual Switch Instance and message (just CE1 be connected user's physical address); Search physical address table; If hit, then directly obtain out virtual port; If do not hit, on all corresponding virtual ports of Virtual Switch Instance, broadcast; From the corresponding next hop information of virtual port, the MIM header that taking-up will encapsulate is packaged into the MIM message then; Get into the MIM network from port A, in this network, carry out MIM and transmit; Arrive the user that CE1 connects at last, realized communicating by letter of the VPLS network user and the MIM network user.

The method and system that user's intercommunication that the above user who is realization MIM network connects on an equipment is connected with the VPLS network is transmitted; Certainly; Also can on two equipment, realize the intercommunication forwarding respectively; But that kind needs to increase an equipment, described handling process above equally also can using.

Adopt a kind of method and system that realize that MIM and VPLS intercommunication are transmitted of the present invention; Needn't spend the new network of cost construction again; Save the layout cost, select easily flexibly, guaranteed client's the interests and the demand of different levels for the carrier network layout provides a kind of.

Though the present invention will be described with reference to embodiment more than should be noted that, this does not mean it is limitation of the present invention, and protection scope of the present invention is limited accompanying claims rather than embodiment.

Claims

1. a method that realizes that MIM and VPLS intercommunication are transmitted is characterized in that, may further comprise the steps:

2. the implementation method that MIM according to claim 1 and VPLS intercommunication are transmitted, it is characterized in that: wherein, said step (1) further comprises:

A) obtain Virtual Switch Instance according to the MIM header;

3. the implementation method that MIM according to claim 1 and VPLS intercommunication are transmitted, it is characterized in that: wherein, said step (2) further comprises:

A) obtain into virtual port information according to the VPLS header;

4. the system according to one of claim 1 to 3 said realization MIM and VPLS intercommunication forwarding is characterized in that this system comprises: MIM network, VPLS network, and the core switch BEB-PE of MIM network and VPLS network boundary; Wherein, also comprise in MIM network and the VPLS network: the network core switch, be used to be connected the network edge switch of ustomer premises access equipment, and the port A and the port B that is connected to VPLS network core switch that are connected respectively to MIM network core switch; Wherein, port A and port B are set in same Virtual Switch Instance, and port A and port B handle the message in the heterogeneous networks respectively.

5. according to the system of claim 4 said realization MIM and VPLS intercommunication forwarding, it is characterized in that the outer head of data comprises in the MIM network: outer purpose MAC, source MAC, outside VLAN and the I-TAG corresponding with Virtual Switch Instance; The outer head of data comprises in the VPLS network: outer purpose MAC, source MAC, outside VLAN and VPLS label.