CN102355424B - A kind of method and system realizing MIM and VPLS intercommunication forwarding - Google Patents
A kind of method and system realizing MIM and VPLS intercommunication forwarding Download PDFInfo
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- CN102355424B CN102355424B CN201110319935.2A CN201110319935A CN102355424B CN 102355424 B CN102355424 B CN 102355424B CN 201110319935 A CN201110319935 A CN 201110319935A CN 102355424 B CN102355424 B CN 102355424B
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Abstract
The present invention discloses a kind of method and the system that realize MIM and VPLS intercommunication forwarding, the method comprises: (1) data from MIM network are when leaving network edge device, the outer head of MIM data is peeled off, the more outer head of packaging V PLS enters VPLS network; (2) the outer head of VPLS data, when leaving network edge device, is peeled off by the data come from VPLS network, then encapsulates the outer head of MIM and enter MIM network. Meanwhile, the invention also discloses the system for realizing aforesaid method. The method of the invention can allow the user connecting MIM network realize mutual communication with the user being connected VPLS network with system, the network that need not again spend cost construction new, save layout cost, select easily flexibly for operator's network topology provides a kind of, ensure that the demand of the interests of client and different levels.
Description
Technical field
The present invention relates to network communication technology field, it relates to a kind of method and system realizing MIM and VPLS intercommunication forwarding.
Background technology
MIM, i.e. MAC-in-MAC, provider backbone bridging agreement, MIM is a kind of Layer 2 virtual private network technology, and it is nested by MAC address, is encapsulated among the MAC of operator by the MAC of user, isolated as internal layer MAC, thus enhanced the extendability of Ethernet and the security of business; Solve the restriction that service supplier only shares with 4096 VLAN, extend MAC address space;
VPLS (VirtualPrivateLANService, private virtual lan business) is a kind of a kind of business providing similar local area network in VPLS network, is in fact a kind of Layer 2 virtual private network technology based on Ethernet. VPLS makes the user network being dispersed on different geographical position communicate mutually, just as they directly interconnect. VPLS uses Ethernet interface netting side towards user, simplifies local area network border, it is possible to support fast and service arrangement flexibly; Give user by the right of the route policy control of user network and maintenance, simplify the management of operator's network; All users in territory are parts for identical subnet, simplify the planning of IP address, and VPLS service does not need to participate in IP addressing and route.
Intercommunication forwards and refers to that the user connecting two heterogeneous networks territories in network is realized communication by operator; Under normal circumstances, the user in MIM network domains only can communicate with the user in present networks, and in same VPLS network, user is also like this; If but need the user in MIM network domains to communicate with user in VPLS network, and these two kinds of users are not or not same place, so just need operator to remove layout new network again, great waste can be caused like this, and for client, it is also desirable to the cost outside commitment; Realize intercommunication forwarding technology on switches, make operator on the basis of existing network layout, user's communication in two heterogeneous networks territories will be connected, select easily flexibly for operator's network topology provides a kind of, ensure that the demand of the interests of client and different levels; The user how realizing connecting MIM network communicates mutually with the user being connected VPLS network, the expense of minimizing network operator in network topology and cost, and this is the major reason realizing MIM and VPLS intercommunication forwarding on switches.
Summary of the invention
It is an object of the present invention to provide a kind of method and the system that realize MIM and VPLS intercommunication forwarding, the user connecting MIM network can be allowed to realize mutual communication with the user being connected VPLS network, ensure more reliably for operator's network topology provides, it is provided that one is selected flexibly easily.
The present invention realizes above-mentioned purpose by following scheme:
Realize the method that MIM and VPLS intercommunication forwards, comprise the following steps:
(1) the outer head of MIM data, when leaving network edge device, is peeled off, the more outer head of packaging V PLS enters VPLS network by the data come from MIM network;
(2) the outer head of VPLS data, when leaving network edge device, is peeled off by the data come from VPLS network, then encapsulates the outer head of MIM and enter MIM network.
Wherein, described step (1) comprises further:
A) Virtual Switch Instance is obtained according to MIM head information;
B) search the object MAC of interior layer data, find data according to Virtual Switch Instance and object MAC and go out virtual port information;
C) go out after virtual port information finds, it may also be useful to go out the down hop specified in information, outer for data message packaging V PLS head is entered VPLS network.
Wherein, described step (2) comprises further:
A) obtain into virtual port information according to VPLS head information;
If b) found into virtual port information, obtain Virtual Switch Instance further;
C) search the object MAC of interior layer data, find data according to Virtual Switch Instance and object MAC and go out virtual port information;
D) go out after virtual port information finds, it may also be useful to go out the down hop specified in information, data message is encapsulated the outer head of MIM and enters MIM network.
The invention also discloses a kind of system realizing above-mentioned MIM and VPLS intercommunication and forwarding, this system comprises: MIM network, VPLS network, and the core exchange board BEB-PE of MIM network and VPLS network boundary; Wherein, MIM network and VPLS network also comprise: network core exchange board, for connecting the network edge exchange board of ustomer premises access equipment, and it is connected respectively to the port A of MIM network core exchange board and is connected to the port B of VPLS network core exchange board; Wherein, port A and port B is set in same Virtual Switch Instance, and port A and port B processes the message in heterogeneous networks respectively.
Further, in described MIM network, the outer head of data comprises: outer object MAC, source MAC, outer VLAN and the I-TAG corresponding with Virtual Switch Instance; In VPLS network, the outer head of data comprises: outer object MAC, source MAC, outer VLAN and VPLS label.
On the edge device that the present patent application is had a common boundary in MIM network and VPLS network, by arranging MIM network termination point and VPLS network destination node in same Virtual Switch Instance, the destination node of MIM network is also the initiation point of VPLS network, otherwise the destination node of VPLS network is also the initiation point of MIM network, the user connecting MIM network is allowed to realize mutual communication with the user being connected VPLS network, the network that need not again spend cost construction new, save layout cost, select easily flexibly for operator's network topology provides a kind of, ensure that the demand of the interests of client and different levels.
Accompanying drawing explanation
According to embodiment and accompanying drawing, the present invention is described in further detail below.
Fig. 1 is that MIM and VPLS intercommunication forwards physics link connection structural representation;
Fig. 2 is the outer head schematic diagram of MIM network and VPLS network boundary equipment two end data;
Fig. 3 is that MIM network data of the present invention convert VPLS network data flowchart to;
Fig. 4 is that VPLS network data of the present invention convert MIM network data flow journey figure to.
Embodiment
Fig. 1 is that MIM and VPLS intercommunication forwards physics link connection structural representation, as shown in Figure 1, give seven exchange board tunnel links and connect structural representation: in Fig. 1, exchange board CE1 and CE2 is for connecting ustomer premises access equipment, edge exchange board BEB is operator's network edge device, core exchange board BCB is MIM network core device, BEB-PE is the core exchange board that MIM network and VPLS network are had a common boundary, its port A is connected to MIM network core exchange board BCB, and port B is connected to VPLS network core exchange board P; PE is VPLS network edge exchange board, and wherein, exchange board BEB-PE is the core that in whole network, intercommunication forwards.
Port A and port B on exchange board BEB-PE process the message in heterogeneous networks respectively.
Exchange board BEB-PE processes the outer head schematic diagram of heterogeneous networks data as shown in Figure 2, and in MIM network, the outer head of data comprises outer object MAC, source MAC, outer VLAN and I-TAG (corresponding with Virtual Switch Instance); In VPLS network, the outer head of data comprises outer object MAC, source MAC, outer VLAN and VPLS label; Important: port A and port B is set in same Virtual Switch Instance.
After the user data of CE1 enters MIM network, being encapsulated into MIM message, after arriving BEB-PE equipment, MIM network data convert VPLS network data processing flow process to as shown in Figure 3; After port A receives MIM data message, according to the source MAC carried in outer head, outer VLAN and I-TAG, obtain Virtual Switch Instance information, obtain VFI from termination table, simultaneously peeling outer layer head, in Virtual Switch Instance, learn internal layer source MAC (being also exactly user's physical address that CE1 connects), simultaneously according to the internal layer object MAC of Virtual Switch Instance and message, search physical address table, if hit, then directly obtain out virtual port; If not hit, all virtual port that Virtual Switch Instance is corresponding is broadcasted; Then from, next hop information corresponding to virtual port, taking out the VPLS head information to be encapsulated, be packaged into VPLS message, enter VPLS network from port B, in this network, carry out VPLS forwarding, finally arrive the user that CE2 connects, it is achieved that the MIM network user communicates with VPLS network user's;
After the user data of CE2 enters VPLS network, being encapsulated into VPLS message, after arriving BEB-PE equipment, VPLS network data convert MIM network data processing flow process to as shown in Figure 4; After port B receives VPLS data message, according to the label information carried in outer head, obtain the virtual port in source from termination table, peel off VPLS heading; The Virtual Switch Instance information corresponding according to the virtual port in source, internal layer source MAC (being also exactly user's physical address that CE2 connects) is learnt in Virtual Switch Instance, simultaneously according to the internal layer object MAC (being also exactly user's physical address that CE1 connects) of Virtual Switch Instance and message, search physical address table, if hit, then directly obtain out virtual port; If not hit, all virtual port that Virtual Switch Instance is corresponding is broadcasted; Then from, next hop information corresponding to virtual port, taking out the MIM head information to be encapsulated, be packaged into MIM message, enter MIM network from port A, in this network, carry out MIM forwarding, finally arrive the user that CE1 connects, it is achieved that VPLS network user communicates with the MIM network user's.
The above is the method and the system that realize the user of MIM network connection and user's intercommunication forwarding of VPLS network connection on an equipment, certainly, intercommunication can also be realized on two equipment respectively forward, but need like that to increase an equipment, treatment scheme described above can also be used equally.
Adopt a kind of method and system realizing MIM and VPLS intercommunication forwarding of the present invention, the network that need not again spend cost construction new, save layout cost, select easily flexibly for operator's network topology provides a kind of, ensure that the demand of the interests of client and different levels.
Although it should be noted that be that the present invention will be described with reference to embodiment above, but this does not mean it is limitation of the present invention, protection scope of the present invention is limited by claims instead of embodiment.
Claims (2)
1. the method realizing MIM and VPLS intercommunication and forwarding, it is characterised in that, comprise the following steps:
(1) the outer head of MIM data, when leaving network edge device, is peeled off by the data come from Mac-in-MacMIM network, then encapsulates the outer head of virtual special local area network business VPLS and enter VPLS network;
(2) the outer head of VPLS data, when leaving network edge device, is peeled off by the data come from VPLS network, then encapsulates the outer head of MIM and enter MIM network;
Wherein, in MIM network, the outer head of data comprises outer object MAC, source MAC, outer VLAN and service instance tag I-TAG; In VPLS network, the outer head of data comprises outer object MAC, source MAC, outer VLAN and VPLS label, arranges the port A and port B that process the message in heterogeneous networks on exchange board BEB-PE respectively in same Virtual Switch Instance;
Described step (1) comprises further:
A1) Virtual Switch Instance is obtained according to MIM head information;
B1) search the object MAC of interior layer data, find data according to Virtual Switch Instance and object MAC and go out virtual port information;
C1) go out after virtual port information finds, it may also be useful to go out the down hop specified in virtual port information, outer for data message packaging V PLS head is entered VPLS network;
Described step (2) comprises further:
A2) obtain into virtual port information according to VPLS head information;
B2) if finding into virtual port information, Virtual Switch Instance is obtained further;
C2) search the object MAC of interior layer data, find data according to Virtual Switch Instance and object MAC and go out virtual port information;
D2) go out after virtual port information finds, it may also be useful to go out the down hop specified in virtual port information, data message is encapsulated the outer head of MIM and enters MIM network.
2. a method according to claim 1 realizes the system that MIM and VPLS intercommunication forwards, it is characterised in that, this system comprises: MIM network, VPLS network, and the core exchange board BEB-PE that MIM network and VPLS network are had a common boundary; Wherein, MIM network and VPLS network also comprise: network core exchange board, for connecting the network edge exchange board of ustomer premises access equipment, and it is connected respectively to the port A of MIM network core exchange board and is connected to the port B of VPLS network core exchange board; Wherein, port A and port B is set on core exchange board BEB-PE, port A and port B is set in same Virtual Switch Instance, and port A and port B processes the message in heterogeneous networks respectively; In MIM network, the outer head of data comprises: outer object MAC, source MAC, outer VLAN and the I-TAG corresponding with Virtual Switch Instance;In VPLS network, the outer head of data comprises: outer object MAC, source MAC, outer VLAN and VPLS label.
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| CN1968163A (en) * | 2006-10-25 | 2007-05-23 | 华为技术有限公司 | Method for service channel detection and system for providing the same |
| CN1984069A (en) * | 2006-05-29 | 2007-06-20 | 华为技术有限公司 | Method and system for end-to-end pseudo-line analog access |
| CN101047600A (en) * | 2006-05-11 | 2007-10-03 | 华为技术有限公司 | City range Ethernet bridge equipment, system and method for providing service to it |
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| US7746892B2 (en) * | 2005-11-02 | 2010-06-29 | Nortel Networks Limited | Method and apparatus for transporting ethernet services |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101047600A (en) * | 2006-05-11 | 2007-10-03 | 华为技术有限公司 | City range Ethernet bridge equipment, system and method for providing service to it |
| CN1984069A (en) * | 2006-05-29 | 2007-06-20 | 华为技术有限公司 | Method and system for end-to-end pseudo-line analog access |
| CN1968163A (en) * | 2006-10-25 | 2007-05-23 | 华为技术有限公司 | Method for service channel detection and system for providing the same |
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