CN100531157C - Method for realizing two-layer VPN and three-layer VPN interconnecting and interworking - Google Patents
Method for realizing two-layer VPN and three-layer VPN interconnecting and interworking Download PDFInfo
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Abstract
The method includes steps: selecting two interfaces A and B connected to each other in one PE router; placing interface A on VFI instance in same two-layer VPN of PE router needed to connected to three-layer VPN each other; placing interface B on VRF instance in same three-layer VPN of PE router needed to connected to two-layer VPN each other; then, allotting one IP address of three-layer VPN for interface B in PE router; the said address and user's IP address in two-layer VPN are in same sub network; the method configures IP gateway for users of two-layer VPN, and address of the network gateway is pointed to address of the interface B of PE router. The invention realizes interconnection and intercommunication between two-layer VPN and three-layer VPN on or not on same PE router. Features are: simple operation, no need of adding new device by operation manager, and no influence on operated network, users on three-layer VPN, and users on two-layer VPN.
Description
Technical field
The present invention relates to the route technology in the communication network, and be particularly related to the implementation method that a kind of two-layer virtual private network (Virtual Private Network is hereinafter to be referred as VPN) and three-layer VPN interconnect.
Background technology
Vpn service is one of telecommunication service of new generation of tool potentiality.Based on multi protocol label exchange (Multi-Protocol Label Switching, hereinafter to be referred as MPLS) network realizes that the technology of VPN improved traditional Internet protocol (Internet Protocol greatly, hereinafter to be referred as IP) defective of network, can provide again simultaneously and frame relay/asynchronous transfer mode (ASYNCHRONOUS TRANSMIT MODE, abbreviation ATM) fail safe that network is the same guarantees, has adapted to the demand of vpn service well.Traditional IP network is all carried out the 3rd layer route querying at each routing node, and the time-delay of total capaciated flow network is bigger; Traditional IP network can't provide good fail safe for user's private network; Traditional network do at service quality (Quality of Service, be called for short QoS) aspect neither be very good.The appearance of MPLS technology solves these problems well, and the especially release of MPLS VPN can provide abundant business to the user on IP network.
With the development of MPLS VPN technologies, three-layer VPN and two-layer VPN technology have also occurred.The three-layer VPN technology makes the user regard the network of operator as an only big router to oneself serving; And the development of two-layer VPN technology makes the user to regard the network of operator as an only big Layer 2 switch to oneself serving.The user does not need to be concerned about the mode that the VPN of operator inside realizes, only need regard it as a switch or a router.No matter be two-layer VPN or three-layer VPN, the operation commercial city does not need to be concerned about client's oneself network.The technology of VPN makes operator provide different VPN to insert at same IP backbone network to different users.Operator is realizing that interconnecting between the two-layer VPN user is very easy to realize, controls by set up different Virtual Switch Instance (Virtual Forwarding Instance is hereinafter to be referred as VFI) on router.Operator is realizing that interconnecting between the three-layer VPN user is very easy to realize, controls by set up different VPN routes and forwarding instance (VPN Routing and ForwardingInstances is hereinafter to be referred as VRF) on router.
But if the user need be in two-layer VPN user and three-layer VPN user's intercommunication, this has just caused problem to operator.Even by careful planning, also be difficult to stop the generation of this situation, in the different place of the network coverage of operator, satisfy different users, and make up producer's difference of the network of operator, asynchronism(-nization), when the technology of the mode VPN of Shi Xianing was also different at that time, situation especially like this.When the network size of operator's structure is increasing, two-layer VPN user and three-layer VPN user's intercommunication problem will become extremely important.
In the prior art, the difficulty of three-layer VPN and two-layer VPN intercommunication is that mainly the label of distributing to the label of two-layer VPN on same the router and distributing to three-layer VPN is not mutual.It is inequality promptly needing the two-layer VPN of intercommunication and the label of three-layer VPN, can't directly come intercommunication two-layer VPN and three-layer VPN according to the existing Label Forwarding Information Base of router.
Therefore need a kind of method that can realize three-layer VPN and two-layer VPN intercommunication, when making up MPLS VPN network, can solve following point for operator:
1, the problem that how interconnects with the user of the two-layer VPN that has existed of newly-built three-layer VPN user.
2, the problem that how interconnects with the user of the three-layer VPN that has existed of newly-built two-layer VPN user.
When 3, realizing the intercommunication of two-layer VPN and three-layer VPN, how to realize the problem that influences minimum to the user.
When 4, realizing the intercommunication of two-layer VPN and three-layer VPN, how to realize the problem of web influence minimum that operator is being runed.
5, how to realize the highest problem of interoperability price ratio of three-layer VPN and two-layer VPN.
Summary of the invention
In view of this, the objective of the invention is to use simple and reliable method on router, to realize the intercommunication of two-layer VPN and three-layer VPN, by at a Provider Edge (Provider Edge, hereinafter to be referred as PE) connect on the router and be provided with, realize the IP transparent transmission of two-layer VPN and three-layer VPN.Its core concept is that the flow of two-layer VPN and three-layer VPN is transmitted for the pure three layers of IP flow when this router intercommunication, rather than the forwarding of flow of two layers of tape label.And then realize that two-layer VPN and three-layer VPN are interconnecting on same pe router on same the pe router or not.
For achieving the above object, the invention provides the implementation method that a kind of two-layer VPN and three-layer VPN interconnect, be applicable to two-layer VPN and the three-layer VPN situation on same pe router, this method may further comprise the steps:
Step 1: on same pe router, select two the interface A and the B of same media type or different medium type for use, and the two is interconnected;
Step 2: with above-mentioned interface A be placed on above-mentioned pe router need with the VFI example of the same two-layer VPN of three-layer VPN intercommunication in;
Step 3: with above-mentioned interface B be placed on above-mentioned pe router need with the VRF instance of the same three-layer VPN of two-layer VPN intercommunication in;
Step 4: the IP address of on above-mentioned pe router, distributing a three-layer VPN for interface B; The user's IP address of this address and two-layer VPN is on same subnet;
Step 5: at user's configuration of IP gateway of two-layer VPN, the address of the interface B of above-mentioned pe router is pointed in the address of this gateway.
Further, the interface that above-mentioned media type is identical is a gigabit, a kind of in 100,000,000,10,000,000,000 interface types.
Further, two interfaces of above-mentioned same media type are connected by the connection cable with this interface medium type matching, and above-mentioned connection cable is cross cable or optical cable at least; And
The interface of different medium type is realized connecting by media converter.
The implementation method that the present invention also provides a kind of two-layer VPN and three-layer VPN to interconnect, be applicable to the not situation on same pe router of two-layer VPN and three-layer VPN, (be designated as: the PE1 router) last and three-layer VPN (is designated as: the PE2 router), then at second pe router if two-layer VPN is at first pe router
If on the PE1 router, realize interconnecting, execution in step 10-16 then;
Step 10: set up the forwarding instance of a three-layer VPN on the PE1 router, the user of three-layer VPN who needs intercommunication on this forwarding instance and the PE2 router is in same VPN;
Step 11: on the PE1 router, select two the interface A and the B of same media type or different medium type for use, and the two is interconnected;
Step 12: with above-mentioned interface A be placed on above-mentioned PE1 router need with the VFI example of the same two-layer VPN of three-layer VPN intercommunication in;
Step 13: above-mentioned interface B is placed in the VRF instance of the three-layer VPN that above-mentioned PE1 router sets up;
Step 14: the IP address of on above-mentioned PE1 router, distributing a three-layer VPN for interface B; The user's IP address of this address and two-layer VPN is on same subnet;
Step 15: at user's configuration of IP gateway of two-layer VPN, the address of the interface B of above-mentioned PE1 router is pointed in the address of this gateway;
Step 16: finish.
If on the PE2 router, realize interconnecting, execution in step 20-26 then;
Step 20: set up the forwarding instance of a two-layer VPN on the PE2 router, the user of two-layer VPN who needs intercommunication on this forwarding instance and the PE1 router is in same VPN;
Step 21: on the PE2 router, select two the interface A and the B of same media type or different medium type for use, and the two is interconnected;
Step 22: above-mentioned interface A is placed in the VFI example of the two-layer VPN that above-mentioned PE2 router sets up;
Step 23: with above-mentioned interface B be placed on above-mentioned PE2 router need with the VRF instance of the same three-layer VPN of two-layer VPN intercommunication in;
Step 24: the IP address of on above-mentioned PE2 router, distributing a three-layer VPN for interface B; The user's IP address of this address and two-layer VPN is on same subnet;
Step 25: at user's configuration of IP gateway of two-layer VPN, the address of the interface B of above-mentioned PE2 router is pointed in the address of this gateway; Execution in step 26;
Step 26: finish.
Further, the interface that above-mentioned media type is identical is a gigabit, a kind of in 100,000,000,10,000,000,000 interface types.
Further, two interfaces of above-mentioned same media type are connected by the connection cable with this interface medium type matching, and above-mentioned connection cable is cross cable or optical cable at least; And
The interface of different medium type is realized connecting by media converter.
Further, the user who inserts the two-layer VPN of the PE1 router flow that need enter the three-layer VPN of PE2 router is stamped double-layer label; And
The user of the three-layer VPN of access PE2 router need enter the flow of the two-layer VPN of PE1 router and be stamped double-layer label.
Adopt two-layer VPN of the present invention and three-layer VPN interworking technology method, have following advantage at least:
1, realizes that simply operator does not need to increase new equipment.
2, to the three-layer VPN user and the not influence of two-layer VPN user of operator, do not influence normal use.
3, to operator itself the operation network without any influence, do not influence its normal operation.
Below in conjunction with accompanying drawing, concrete enforcement of the present invention is described in further detail.For those skilled in the art that, from the detailed description to the inventive method, above-mentioned and other purposes of the present invention, feature and advantage will be apparent.
Description of drawings
Fig. 1 is two-layer VPN interconnected in a preferred embodiment of the present invention and the three-layer VPN connection diagram at same pe router;
Fig. 2 is that two-layer VPN interconnected in a preferred embodiment of the present invention and three-layer VPN be not in the connection diagram of same pe router;
Fig. 3 is that two-layer VPN interconnected in a preferred embodiment of the present invention and three-layer VPN be not in the connection diagram of same pe router;
Fig. 4 is in a preferred embodiment of the present invention, is that example illustrates the flow transport process schematic diagram that interconnects among Fig. 1 with certain packet;
Fig. 5 is in a preferred embodiment of the present invention, is that example illustrates the flow transport process schematic diagram that interconnects among Fig. 2 with certain packet;
Fig. 6 is in a preferred embodiment of the present invention, is that example illustrates the flow transport process schematic diagram that interconnects among Fig. 3 with certain packet.
Embodiment
The present invention is based upon on the router existing version basis, just on the basis of the miscellaneous service of router realization at present, solve this problem with simple and practical engineering method, at length introduce the implementation method that two-layer VPN of the present invention and three-layer VPN interconnect and the principle and the data forwarding process of concrete two-layer VPN and the intercommunication of three-layer VPN flow below in two kinds of situation.
First kind of situation: two-layer VPN that need interconnect and the three-layer VPN implementation on same pe router.
As shown in Figure 1, the method step of realizing when the VPN two-layer user that needs intercommunication and three layers of user are on same pe router is as follows:
Step 1: selecting two interface A and B on router, for example is two interfaces of same media type, represents with Interface A and Interface B respectively.Cross cable or optical cable with this interface medium type connects Interface A and Interface B then.Purpose is that Interface A and Interface B can use the mutual flow of transmitting from the other side of interconnected cable.The type of cable and the type of interface are not particularly limited, as long as can realize this function.
Step 2: Interface A be placed on pe router need with the VFI example of the same two-layer VPN of three-layer VPN intercommunication in.The flow that enters pe router from two-layer VPN can arrive InterfaceA like this.
Step 3: Interface B be placed on pe router need with the VRF instance of the same three-layer VPN of two-layer VPN intercommunication in.The flow that enters pe router from three-layer VPN can arrive InterfaceB like this.
Step 4: distribute the IP address of a three-layer VPN on pe router for Interface B, the user's IP address of this address and two-layer VPN is on same subnet.
Step 5: at user's configuration of IP gateway of two-layer VPN, the address of the Interface B of pe router is pointed in the address of this gateway;
Through above-mentioned steps, just can realize that the user of two-layer VPN and the user of three-layer VPN interconnect.
Referring again to Fig. 4, the principle and the data forwarding process of concrete two-layer VPN and the intercommunication of three-layer VPN flow are as follows on same pe router:
When the flow T1 that the user of two-layer VPN need enter three-layer VPN enters pe router, search media access control layer (the Medium Address Control of two layers VPN, hereinafter to be referred as MAC) addresses forwarding table, determine interface Interface A, flow T1 goes out pe router by Interface A, reenters pe router by Interface B again; When flow T1 reenters pe router, search the route forwarding table of three-layer VPN, determine the outgoing interface of the three-layer VPN of flow T1, flow T1 enters three-layer VPN from two-layer VPN smoothly like this;
When the flow T2 that the user of three-layer VPN need enter two-layer VPN enters pe router, search the route forwarding table of three layers VPN, determine interface Interface B, flow T2 goes out pe router by Interface B, reenter pe router by Interface A again, when flow T2 reenters pe router, search the mac address forwarding table of two-layer VPN, determine the outgoing interface of the two-layer VPN of flow T2, flow T2 successfully enters two-layer VPN from three-layer VPN like this.
Second kind of situation: two-layer VPN that need interconnect and three-layer VPN be the implementation on same pe router not.For example have only the access of two-layer VPN on the PE1 router, do not require the access of the three-layer VPN of intercommunication; Perhaps have only the access of three-layer VPN on the PE2 router, do not require the access of the two-layer VPN of intercommunication.Introduce the implementation method of two kinds of situations below respectively.
As shown in Figure 2, the PE1 router inserts two-layer VPN, and the PE2 router inserts three-layer VPN, and is middle through the P router.
Realize that on the PE1 router method step that interconnects is as follows:
Set up the forwarding instance of a three-layer VPN on the router of step 10:PE1, the user of three-layer VPN who needs intercommunication on this forwarding instance and the PE2 router is in same VPN.
Step 11: selecting two interface A and B on the PE1 router, for example is two interfaces of same media type, represents with Interface A and Interface B respectively.Use the cross cable or the optical cable of this interface medium type then, connect Interface A and Interface B.Purpose is: these two interface Interface A and Interface B can be by the mutual flows of transmitting from the other side of the cable of this root interconnection.The type of cable and the type of interface are not particularly limited, as long as can realize this function.
Step 12: Interface A be placed on the PE1 router need with the VFI example of the same two-layer VPN of three-layer VPN intercommunication in.The flow that enters pe router from two-layer VPN can arrive Interface A like this.
Step 13: Interface B is placed in the VRF instance of the three-layer VPN that the PE1 router sets up.The flow that enters the PE1 router from three-layer VPN can arrive Interface B like this.
Step 14: on the PE1 router, distribute the IP address of a three-layer VPN for Interface B, this address in the user's IP address of two-layer VPN on same subnet.
Step 15: at user's configuration of IP gateway of two-layer VPN, the Interface B address of PE1 router is pointed in the address of this gateway.
Through above-mentioned steps, can realize three-layer VPN user on the PE1 router and the intercommunication of the two-layer VPN user on the PE1.Intercommunication is to be based upon on the available basis of MPLS VPN configuration, but this is not an emphasis of the present invention, and two-layer VPN how separate configurations is relevant on pe router and three-layer VPN and the present invention directly do not concern, just no longer are elaborated at this.Suppose all also in the following description that independently two layers and three-layer VPN can both the intercommunication connections.
Referring again to Fig. 5, the principle and the data forwarding process of concrete two-layer VPN on the PE1 router and the intercommunication of three-layer VPN flow are as follows:
When the flow T1 that the user of two-layer VPN need enter three-layer VPN enters the PE1 router, search the mac address forwarding table of two layers VPN, determine interface Interface A, flow T1 goes out pe router by Interface A, reenters the PE1 router by Interface B again; When flow T1 reenters the PE1 router, search the route forwarding table of three-layer VPN, the outgoing interface address of determining the three-layer VPN of flow T1 is the address of PE2, and this message is stamped double-layer label and is sent to the PE2 router; The PE2 router is delivered to flow T1 on the PE2 router according to the label of VPN and is gone among the corresponding three-layer VPN user, and the flow T1 of the two-layer VPN of PE1 has gone from the three-layer VPN user that PE1 enters into PE2 like this;
When the flow T2 that the user of three-layer VPN need enter two-layer VPN enters the PE2 router, search the route forwarding table of three layers VPN, determine the address of the router of interface IP address PE1, this flow T2 is stamped double-layer label and is sent to the PE1 router; When flow T2 enters the PE1 router, search the route forwarding table of three layers VPN, determine interface Interface B, flow T2 goes out the PE1 router by Interface B, reenter the PE1 router by Interface A again, search the mac address forwarding table of two-layer VPN, determine interface, at the three-layer VPN flow T2 of PE2, enter user like this at the PE1 two-layer VPN.
As shown in Figure 3, realize that on the PE2 router method step that interconnects is as follows:
Set up the forwarding instance of a two-layer VPN on the router of step 20:PE2, the user of two-layer VPN who needs intercommunication on this forwarding instance and the PE1 router is in same VPN.
Step 21: selecting two interface A and B on the PE2 router, for example is two interfaces of same media type, represents with Interface A and Interface B respectively.Use the cross cable or the optical cable of this interface medium type then, connect Interface A and Interface B.Purpose is: these two interface Interface A and Interface B can be by the mutual flows of transmitting from the other side of the cable of this root interconnection.The type of cable and the type of interface are not particularly limited, as long as can realize this function.
Step 22: Interface A is placed on the PE2 router to be needed in the VFI example of newly-built two-layer VPN.The flow that enters the PE2 router like this from the two-layer VPN flow from the P router can arrive InterfaceA.
Step 23: Interface B be placed on the PE2 router need with the VRF instance of the same three-layer VPN of two-layer VPN intercommunication in.The flow that enters pe router from three-layer VPN can arrive Interface B like this.
Step 24: on the PE2 router, distribute the IP address of a three-layer VPN for Interface B, this address in the user's IP address of two-layer VPN on same subnet.
Step 25: at user's configuration of IP gateway of two-layer VPN, the Interface B address of PE2 router is pointed in the address of this gateway.
Through above-mentioned steps, can be in the intercommunication that realizes the two-layer VPN user on three-layer VPN user and the PE1 on the PE2 router.Intercommunication is to be based upon on the available basis of MPLS VPN configuration, but this is not an emphasis of the present invention, and two-layer VPN and three-layer VPN that how configuration is correlated with on pe router just no longer are elaborated at this.
Referring again to Fig. 6, the principle and the data forwarding process of concrete two-layer VPN on the PE1 router and the intercommunication of three-layer VPN flow are as follows:
When the flow T1 that the user of two-layer VPN need enter three-layer VPN enters the PE1 router, search the mac address forwarding table of two layers VPN, determining interface IP address is the PE2 router, and this flow T1 is stamped double-layer label and delivers to router PE 2; When flow T1 enters the PE2 router, search the mac address forwarding table of two layers VPN, determine interface Interface A, when flow T1 goes out the PE2 router by Interface A, reenter the PE2 router by Interface B again, search transmitting of three-layer VPN address then, determine the outgoing interface of flow T1, the flow T1 of the two-layer VPN of PE1 has gone from the three-layer VPN user that PE1 enters into PE2 like this;
When the flow T2 that the user of three-layer VPN need enter two-layer VPN enters the PE2 router, search the route forwarding table of three layers VPN, determining interface is Interface B, and flow T2 is sent the PE2 router, reenters the PE2 router by Interface A again; When flow T2 enters the PE2 router, search two layers mac address forwarding table, determining interface IP address is the PE1 router, when being stamped double-layer label, flow T2 delivers to router PE 1, the PE1 router is searched mac address forwarding table, determine T2 flow two-layer VPN user's outgoing interface, the three-layer VPN flow T2 on PE2 like this, the user who enters the two-layer VPN of PE1.
More than describe embodiments of the present invention in detail, but the example of this visualization of just lifting for the ease of understanding should not be considered to be limitation of the scope of the invention.Equally; the ordinary skill of technical field all can be according to the description of technical scheme of the present invention and preferred embodiment thereof under any; make various possible being equal to and change or replacement, but all these changes or replacement all should belong to the protection range of claim of the present invention.
Claims (11)
1, the implementation method that interconnects of a kind of two-layer VPN and three-layer VPN is applicable to two-layer VPN and the three-layer VPN situation on same provider edge router, it is characterized in that may further comprise the steps:
Step 1: on a provider edge router, select two the interface A and the B of same media type or different medium type for use, and the two is interconnected;
Step 2: with above-mentioned interface A be placed on above-mentioned provider edge router need with the Virtual Switch Instance of the two-layer VPN of three-layer VPN intercommunication in;
Step 3: with above-mentioned interface B be placed on above-mentioned provider edge router need with the route and forwarding instance of the same three-layer VPN of two-layer VPN intercommunication in;
Step 4: the IP address of on above-mentioned provider edge router, distributing a three-layer VPN for interface B; The user's IP address of this address and two-layer VPN is on same subnet;
Step 5: at user's configuration of IP gateway of described two-layer VPN, the address of the interface B of above-mentioned provider edge router is pointed in the address of this gateway.
2, implementation method according to claim 1 is characterized in that the identical interface of above-mentioned media type is a kind of in gigabit, 100,000,000,10,000,000,000 interface types.
3, implementation method according to claim 1 and 2 it is characterized in that two interfaces of above-mentioned same media type are connected by the connection cable with this interface medium type matching, and above-mentioned connection cable is cross cable or optical cable at least; And
The interface of different medium type is realized connecting by media converter.
4, the implementation method that interconnects of a kind of two-layer VPN and three-layer VPN is applicable to the not situation on same provider edge router of two-layer VPN and three-layer VPN, it is characterized in that may further comprise the steps:
Step 10: set up the route and the forwarding instance of a three-layer VPN on first provider edge router at two-layer VPN place, the user of three-layer VPN who needs intercommunication on second provider edge router at this forwarding instance and three-layer VPN place is in same VPN;
Step 11: on first provider edge router, select two the interface A and the B of same media type or different medium type for use, and the two is interconnected;
Step 12: with above-mentioned interface A be placed on above-mentioned first provider edge router need with the Virtual Switch Instance of the two-layer VPN of three-layer VPN intercommunication in;
Step 13: above-mentioned interface B is placed in the route and forwarding instance of the three-layer VPN that above-mentioned first provider edge router sets up;
Step 14: the IP address of on above-mentioned first provider edge router, distributing a three-layer VPN for interface B; The user's IP address of this address and two-layer VPN is on same subnet;
Step 15: at user's configuration of IP gateway of described two-layer VPN, the address of the interface B of above-mentioned first provider edge router is pointed in the address of this gateway; Execution in step 16;
Step 16: finish.
5, implementation method according to claim 4 is characterized in that the identical interface of above-mentioned media type is a kind of in gigabit, 100,000,000,10,000,000,000 interface types.
6,, it is characterized in that two interfaces of above-mentioned same media type are connected by the connection cable with this interface medium type matching, and above-mentioned connection cable is cross cable or optical cable at least according to claim 4 or 5 described implementation methods; And
The interface of different medium type is realized connecting by media converter.
7, implementation method according to claim 4, the user who it is characterized in that inserting the two-layer VPN of first provider edge router need enter the flow of the three-layer VPN of second provider edge router and be stamped double-layer label.
8, the implementation method that interconnects of a kind of two-layer VPN and three-layer VPN is applicable to the not situation on same provider edge router of two-layer VPN and three-layer VPN, it is characterized in that may further comprise the steps:
Step 20: set up the Virtual Switch Instance of a two-layer VPN on second provider edge router at three-layer VPN place, the user of two-layer VPN who needs intercommunication on first provider edge router at this forwarding instance and two-layer VPN place is in same VPN;
Step 21: on second provider edge router, select two the interface A and the B of same media type or different medium type for use, and the two is interconnected;
Step 22: above-mentioned interface A is placed in the Virtual Switch Instance of the two-layer VPN that above-mentioned second provider edge router sets up;
Step 23: with above-mentioned interface B be placed on above-mentioned second provider edge router need with the route and forwarding instance of the three-layer VPN of two-layer VPN intercommunication in;
Step 24: the IP address of on above-mentioned second provider edge router, distributing a three-layer VPN for interface B; The user's IP address of this address and two-layer VPN is on same subnet;
Step 25: at user's configuration of IP gateway of described two-layer VPN, the address of the interface B of above-mentioned second provider edge router is pointed in the address of this gateway; Execution in step 26;
Step 26: finish.
9, implementation method according to claim 8 is characterized in that the identical interface of above-mentioned media type is a kind of in gigabit, 100,000,000,10,000,000,000 interface types.
10, according to Claim 8 or 9 described implementation methods, it is characterized in that two interfaces of above-mentioned same media type are connected by the connection cable with this interface medium type matching, and above-mentioned connection cable is cross cable or optical cable at least; And
The interface of different medium type is realized connecting by media converter.
11, implementation method according to claim 8, the user who it is characterized in that inserting the three-layer VPN of second provider edge router need enter the flow of the two-layer VPN of first provider edge router and be stamped double-layer label.
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| CN101827012B (en) * | 2009-03-05 | 2013-02-13 | 中国移动通信集团公司 | Packet transmitting network as well as method for bearing services of pure three layers of IP packets and outlet node |
| CN101667969B (en) * | 2009-09-24 | 2014-09-10 | 中兴通讯股份有限公司 | Method of accessing IP/L3VPN network of L2VPN network and device thereof |
| CN102130836A (en) * | 2011-03-23 | 2011-07-20 | 中兴通讯股份有限公司 | Method and system for reversely notifying layer 3 protocol of message forwarding |
| CN102611618B (en) * | 2012-02-23 | 2015-06-03 | 中兴通讯股份有限公司 | Route protection converting method and device |
| CN103491009B (en) * | 2013-09-27 | 2017-01-04 | 华为技术有限公司 | The retransmission method of a kind of flow, device and gateway device |
| CN106027392B (en) * | 2016-08-09 | 2019-05-14 | 迈普通信技术股份有限公司 | The method and device of corrective network topology |
| CN109756409B (en) * | 2017-11-01 | 2021-10-26 | 中兴通讯股份有限公司 | Bridge forwarding method |
| CN111490891B (en) * | 2019-01-28 | 2021-09-07 | 华为技术有限公司 | Method and device for determining interface configuration |
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| CN101072210A (en) | 2007-11-14 |
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