CN103841028A - Method and device for forwarding messages - Google Patents
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Abstract
The invention discloses a method and device for forwarding messages. An ARP request message sent by a first VM is received by a first VTEP, a mapping request message is sent to a second VTEP through a mapping system, and a mapping relationship between an EID and an RLOC of a second VM under the second VTEP is requested; a mapping response message returned by the second VTEP is received by the first VTEP and the mapping relationship between the EID and the RLOC of the second VM is learned, wherein the EID is an MAC address, an IP address and a VNI of the second VM; the RLOC is an IP address of the second VTEP; the messages sent to the second VM by the first VM are received by the first VTEP, according to the stored mapping relationship between the EID and the RLOC of the second VM, VXLAN packaging is conducted on the messages, and the packaged messages are sent to the second VTEP and forwarded to the second VM through the second VTEP. The function that a VXLAN is operated efficiently under the condition that multicast is avoided is achieved.
Description
Technical field
The present invention relates to network communications technology field, particularly a kind of message forwarding method and equipment.
Background technology
In the multi-tenant environment of cloud computing, each tenant needs the logical network of distributing can carry out with other logical network fine isolation.The isolation of logical network generally solves by VLAN (VLAN, Virtual Local Area Network) technology.In IEEE802.1Q standard, due to the maximum 12bit of mark of VLAN, so maximum VLAN number only has 4K in certain limit.Along with the many tenants demand under cloud environment is more and more, 4K VLAN can not meet the demand that data center's large scale network is disposed.In addition, in cloud computing environment, operating load often need to move in multiple data centers and multiple cloud platform, and the application that has limited two layer connectivitys is divided in the current region based on IP subnet.
VXLAN is a kind of MAC-in-UDP technology, and it,, by 2.5 layers of network, a new network segmentation pattern being set, has added the segment identifier of a 24bit, has expanded greatly the quantity of the logical network that can support in cloud computing environment; And operating load and physical network are departed from, realize logical network and cross over IP network.
VXLAN technology makes the multiple virtual machine (VM in same VXLAN, Virtual Machine) can communicate across three-layer network, in VXLAN technology, the corresponding virtual overlay network of each tenant, each virtual overlay network is considered to a VXLAN network segment, and by virtual local net network identifier (VXLAN Network Identifier, the VNI) mark of expanding of 24.Only have between the VM of identical VNI and just allow to communicate.
Fig. 1 is the networking schematic diagram of prior art data center network.Tunnel terminal (VTEP) A and VTEP B belong to different data centers, in prior art, realize across data center interconnection, be that VM under VTEPA will realize and communicating by letter with the server under VTEP B, there is two schemes: scheme one, VXLAN moves by multicast, when operation, need to dispose multicast.Scheme two, VXLAN moves as control plane agreement by Intermediate System-to-Intermediate System (IS-IS) or border gateway routing protocol (BGP) agreement.
As an example of scheme one example, prior art is described across the message forwarding method of data center, the method need to specify VNI to be mapped to the multicast group of an IP network, each VTEP of this VNI adds this multicast group, and utilizing floods completes address learning with study mechanism, specifically comprises the following steps:
Step 3, VTEP A receive broadcast arp request in multicast group 239.1.1.1 after ARP request;
Step 4, there is same VNI(VXLAN5000 with VTEP A) VTEP B receive after ARP request, study is deposited in local mac list item to the MAC Address of VM and the IP address 1.1.1.1 of VTEP A, simultaneously to the request of the each port broadcast arp of VXLAN5000;
Step 5, server send corresponding arp reply message after receiving ARP request;
Step 6, VTEP B receive arp reply message, and clean culture sends to VTEP A;
Step 7, VTEP A receive arp reply message, and study is deposited in local mac list item to the MAC Address of server and the IP address 1.1.1.2 of VTEPB, and forwards arp reply message to VM;
Step 8, VM send initial data message to VTEP A;
Step 9, VTEP A be according to local mac list item, inquires the IP address 1.1.1.2 of the VTEP B that object MAC is corresponding according to VXLAN ID and target MAC (Media Access Control) address, and packaging V XLAN message, is transmitted to VTEP B;
Step 10, VTEP B receive VXLAN message, peel off the outer encapsulation of VXLAN, according to VXLAN ID and target MAC (Media Access Control) address, message are issued to corresponding server.
Can find out from foregoing description, prior art is across the message forwarding method of data center, if employing scheme one, need to dispose multicast, the VTEP of Liang Ge data center is added to same multicast group, otherwise, if when across data center interconnection, due to not open multicast, cause moving; Meanwhile, learn MAC, inefficiency by flooding with study mechanism.
And, if employing scheme two realizes the message repeating across data center, need between VTEP, set up a large amount of IS-IS or bgp neighbor, Dynamic Maintenance neighborhood, in the time that VTEP quantity is more, is limited to neighbours' specification of IS-IS or BGP itself.
Summary of the invention
The object of the present invention is to provide a kind of message forwarding method and equipment, can realize VXLAN in the efficient operation not having under multicast scenarios.
For achieving the above object, the invention provides a kind of message forwarding method, the method comprises:
The first tunnel terminal VTEP receives the ARP request message that the first virtual machine VM sends, send mapping request message by mapped system to the 2nd VTEP, the endpoint identifier EID of the 2nd VM and the mapping relations of route location identifier RLOC under request the 2nd VTEP; Wherein, a VM and the 2nd VM have identical VNI;
The one VTEP receives the mapping response message that the 2nd VTEP returns, study the 2nd EID of VM and the mapping relations of RLOC; Wherein, EID is MAC Address, IP address and the affiliated VNI of the 2nd VM; RLOC is the IP address of the 2nd VTEP;
The one VTEP reception the one VM sends to the message of the 2nd VM, according to the 2nd EID of VM and the mapping relations of RLOC of preserving, described message is carried out to VXLAN encapsulation, and send to the 2nd VTEP, is transmitted to the 2nd VM by the 2nd VTEP.
For achieving the above object, the present invention also provides a kind of message forwarding equipment, is applied to the first tunnel terminal VTEP, and this equipment comprises:
Mapping request unit, the ARP request message sending for receiving the first virtual machine VM, send mapping request message by mapped system to the 2nd VTEP, the endpoint identifier EID of the 2nd VM and the mapping relations of route location identifier RLOC under request the 2nd VTEP; Wherein, a VM and the 2nd VM have identical VNI;
Mapping relations unit, for the mapping response message of receiving that the 2nd VTEP returns, study the 2nd EID of VM and the mapping relations of RLOC; Wherein, EID is MAC Address, IP address and the affiliated VNI of the 2nd VM; RLOC is the IP address of the 2nd VTEP;
Encapsulate transmitting element, send to the message of the 2nd VM for receiving a VM, according to the 2nd EID of VM and the mapping relations of RLOC of preserving, described message is carried out to VXLAN encapsulation, and send to the 2nd VTEP, be transmitted to the 2nd VM by the 2nd VTEP.
In sum, the embodiment of the present invention the first tunnel terminal VTEP receives the ARP request message that the first virtual machine VM sends, send mapping request message by mapped system to the 2nd VTEP, the endpoint identifier EID of the 2nd VM and the mapping relations of route location identifier RLOC under request the 2nd VTEP; Wherein, a VM and the 2nd VM have identical VNI; The one VTEP receives the mapping response message that the 2nd VTEP returns, study the 2nd EID of VM and the mapping relations of RLOC; Wherein, EID is MAC Address, IP address and the affiliated VNI of the 2nd VM; RLOC is the IP address of the 2nd VTEP; The one VTEP reception the one VM sends to the message of the 2nd VM, according to the 2nd EID of VM and the mapping relations of RLOC of preserving, described message is carried out to VXLAN encapsulation, and send to the 2nd VTEP, is transmitted to the 2nd VM by the 2nd VTEP.Compared with prior art, reduced ARP the flooding of core net, avoided flooding and study mechanism, realized in the situation that there is no multicast, VXLAN can efficiently move.
Accompanying drawing explanation
Fig. 1 is the networking schematic diagram of prior art data center network.
Fig. 2 is the schematic flow sheet of embodiment of the present invention message forwarding method.
Fig. 3 is a networking schematic diagram of embodiment of the present invention supplying method application.
Fig. 4 is the structural representation that is applied to the message forwarding equipment of said method in the specific embodiment of the invention.
The composition schematic diagram of the message forwarding equipment that Fig. 5 provides for further embodiment of this invention.
Embodiment
For making object of the present invention, technical scheme and advantage clearer, referring to the accompanying drawing embodiment that develops simultaneously, scheme of the present invention is described in further detail.
Core concept of the present invention is, in core network, move VXLAN and position and identity separated protocol (LISP simultaneously, Locator/Identity Separation Protocol), LISP is as the control plane agreement of VXLAN, but, as the message encapsulation of datum plane, datum plane is not still with VXLAN encapsulation sending and receiving.Like this, when across data center interconnection, do not have under multicast scenarios, can move VXLAN yet, carry out aware host simultaneously by LISP agreement, the corresponding relation of MAC and VTEP, does not need the study mechanism that floods of datum plane.By method of the present invention, reduce ARP the flooding of core net, avoid flooding and study mechanism, realize in the situation that there is no multicast, VXLAN can efficiently move.
Lower mask body is introduced LISP involved in the present invention, in prior art, LISP is the networking thought that a kind of position separates with mark, form two independently address spaces: endpoint identifier (EID, Endpoint Identifier) address space and route location identifier (RLOC, Routing Locator) address space.EID is the host address of communication end point, realizes identically with existing, and the effect in LISP is similar to domain name system (DNS), has independently space.In LISP network, EID can be independent of RLOC and move, and RLOC is the address of LISP router, can be in existing the Internet routing forwarding, can overall route, and carry out polymerization according to network topology situation.The message of communicating by letter between EID is encapsulated in the tunnel between RLOC and forwards.LISP can be divided into control plane and datum plane by function.Control plane completes the mapping relations of EID and RLOC, by the mapping relations of the specific EID/RLOC of mapping request message request, by mapping response message response mapping request message.Datum plane completes mapping and encapsulation, decapsulation, is encapsulated as LISP encapsulation in LISP network.
Based on the above-mentioned description to existing LISP, method of the present invention has utilized LISP control plane to complete the mapping relations of EID and RLOC, by the mapping relations of the specific EID/RLOC of mapping request message request, shines upon request message by the response of mapping response message.And in the present invention, the EID of LISP is the MAC Address of VM main frame, VM and VXLAN ID three's combination, the IP address that RLOC is VTEP, the tunnel router (xTR) of LISP is safeguarded the mapping relations of EID and RLOC, to MS dynamic registration.Here illustrate, because LISP of the present invention is as the control plane agreement operation of VXLAN, the xTR of LISP safeguards the mapping relations of EID and RLOC, to MS dynamic registration, so when the present invention moves LISP in core network, the VTEP equipment of VXLAN has the function identical with xTR, i.e. on VTEP (on xTR), to the IP address of LISP dynamic registration VM main frame, MAC Address, the mapping relations of VXLAN ID and VTEP address.But datum plane of the present invention is still with VXLAN encapsulation sending and receiving.
Embodiment of the present invention message forwarding method comprises the following steps, and its schematic flow sheet as shown in Figure 2.Wherein, a VTEP and the 2nd VTEP belong to different websites, and different websites can be in same data center, also can be at different pieces of information center.
Particularly, the one VTEP receive under this equipment that the first virtual machine VM sends for asking after the ARP request message of the MAC Address of the 2nd VM under the 2nd VTEP, send mapping request message, request the 2nd EID of VM and the mapping relations of RLOC by mapped system to the 2nd VTEP.
Wherein, mapped system comprises mapping resolver MR and mapping server MS;
The method that the one VTEP sends mapping request message by mapped system to the 2nd VTEP specifically comprises:
The one VTEP sends to MR according to ARP message by mapping request message, sends to registration to have the MS of the 2nd EID of VM and the mapping relations of RLOC mapping request message by MR, by MS, mapping request message is sent to the 2nd VTEP.If now upper also unregistered the 2nd EID of VM and the mapping relations of RLOC of MS, abandon the message of this mapping request to a VTEP feedback by MR, because the log-on message on MS is Dynamic Maintenance, so also carry in the dropping packets feeding back, allow a VTEP again to send the time interval of mapping request message to MR.
Wherein, the 2nd VTEP preserves the 2nd EID of VM and the mapping relations of RLOC, and therefore the 2nd VTEP registers these mapping relations to MS, according to described log-on message, the mapping request message receiving from a VTEP is transmitted to the 2nd corresponding VTEP for MS.
Wherein, after VTEP study the 2nd EID of VM and the mapping relations of RLOC, obtain the MAC Address of the 2nd VM and the corresponding relation of IP address according to EID, and preserve the MAC Address of these mapping relations and the 2nd VM and the corresponding relation of IP address.
Specific implementation is, a VTEP is carried at the MAC Address of the 2nd VM in the EID of described mapping relations in arp reply message, to send to a VM;
The target MAC (Media Access Control) address that the one VTEP receives a VM transmission is the initial data message of the 2nd VM, searches the 2nd EID of VM and the mapping relations of RLOC according to the MAC Address of the 2nd VM, and obtaining corresponding RLOC is the IP address of the 2nd VTEP;
The one VTEP carries out VXLAN encapsulation using the IP address of the 2nd VTEP as object IP to described initial data message, and the VXLAN message after encapsulation is sent to the 2nd VTEP;
The 2nd VTEP receives after the VXLAN message after encapsulation, and the VXLAN message after described encapsulation is descapsulated into initial data message, is the 2nd VM according to initial data message target MAC (Media Access Control) address and IP address, forwards this initial data message to the two VM.
For clearly demonstrating the present invention, enumerate concrete scene below and be elaborated.The control plane agreement operation of the present invention using LISP as VXLAN, therefore the VTEP equipment of VXLAN also moves as the xTR equipment of LISP, and the present invention has also adopted the mapped system in LISP.In mapped system, used MR and MS, MR and MS can be same equipment, can be also different equipment.Simply introduce mapped system operation principle below, the operation principle with it in LISP is identical.If MR and MS are same equipment, mapping request message is directly issued MS by MR; If not same equipment, allow MS to have many, for example there are MS1 and MS2, there are two kinds of implementations: one, MS1 registers the map information of some associated VTEP, MS2 registration has the map information of the associated VTEP of another part, and MR sets up bgp neighbor with MS1, MS2 respectively, the map information on synchronous MS1, MS2, on MR, just had so the map information of all VTEP, MR just knows mapping request message has been issued to which MS; Two, a MS1 being set is root device, and other MS are node device, and on each node device, registration has the map information of associated VTEP separately, and MR first issues MS1 by mapping request message, then issues other corresponding MS by MS1.
Fig. 3 is a networking schematic diagram of embodiment of the present invention supplying method application.VTEP A and VTEP B belong to the website in different data centers, and VM1 and VM2 have identical VNI, and the MR of mapped system and MS are positioned on same equipment.The VM1 the object of the invention is under VTEP A will realize and communicating by letter with the VM2 under VTEP B, and concrete grammar comprises:
Step S1, first, VM2 moves to VTEP2(xTR2) under, under moving to after Site2, noticing MAC Address and the IP address of self to the VTEP2 in Site2, VTEP2 is that VM2 distributes VNI simultaneously.At this moment, VTEP2 just can safeguard the mapping relations of EID and the RLOC of VM2, and Mac address, IP address and VNIID that wherein EID is VM2, be specially: Mac2, VNI1, IP2; RLOC is the IP address of VTEP2, is specially IP B; Then, VTEP2 is to the EID/RLOC of MS registration VM2, thereby MS preserves the EID/RLOC of VM2.
Step S2, VTEP1(xTR1) under VM1(belong to Site1) send ARP ask to VTEP1, request address is: the MAC of IP2.
Step S3, VTEP1 receive after ARP request, ARP do not flooded in core network, but by LISP control plane, send mapping request message (Map-request) to VTEP2, the request EID of VM2 and the mapping relations of RLOC, wherein, request EID is (VNI1, IP2, *);
Concrete, mapping request message is the MR/MS route system by LISP, is forwarded to VTEP2;
Wherein, MR receives the mapping request message that VTEP1 sends, and according to the EID prefix routing iinformation in mapping network, message is sent to corresponding MS;
MS stores the map information of VTEP2 registration, according to log-on message, the mapping request message receiving is transmitted to corresponding VTEP2.
Step S4, VTEP2 directly reply mapping response message (Map-response) to VTEP1, and the EID returning is: (VNI1, IP2, MAC2), RLOC is: IP B.
Step S5, VTEP1 are kept at the EID/RLOC of VM2 in local cache, and follow-up execution ARP proxy function is replied arp reply to VM1, and Mac2 is replied to VM1 by arp reply;
Concrete, VTEP1 can preserve two parts content, and a part is the mapping relations of EID and the RLOC of VM2, and a part is the IP of VM2 and the corresponding relation of MAC: Mac2:IP2.
Step S6, VM1 send datagram to VM2, and data message carries object IP and object MAC is VM2, first sends to VTEP1.
Step S7, VTEP1 are according to the object MAC Mac2 of VM2, and searching corresponding RLOC is IP B, encapsulates by VXLAN, sends datagram to VTEP2;
Wherein, the IP address ip B that VXLAN encapsulation object IP is VTEP2, the IP address ip A that source IP is VTEP1.
Step S8, VTEP2 receive after VXLAN message, carry out decapsulation, then original two layer message are transmitted to VM2;
Wherein, separate VXLAN encapsulation and be exactly and separate UDP encapsulation, then according to the object MAC of initial data message and object IP by data message forwarding to VM2.
So far, completed the communication across data center between VM1 and VM2.
Based on same inventive concept, the present invention also proposes a kind of message forwarding equipment, and referring to Fig. 4, Fig. 4 is the structural representation that is applied to the message forwarding equipment of said method in the specific embodiment of the invention.This message forwarding equipment, is applied to a VTEP, comprising:
Mapping relations unit 402, for the mapping response message of receiving that the 2nd VTEP returns, study the 2nd EID of VM and the mapping relations of RLOC; Wherein, EID is MAC Address, IP address and the affiliated VNI of the 2nd VM; RLOC is the IP address of the 2nd VTEP;
Encapsulate transmitting element 403, send to the message of the 2nd VM for receiving a VM, according to the 2nd EID of VM and the mapping relations of RLOC of preserving, described message is carried out to VXLAN encapsulation, and send to the 2nd VTEP, be transmitted to the 2nd VM by the 2nd VTEP.
Further, described mapping request unit 401 specifically for, according to ARP message, mapping request message is sent to MR, send to registration to have the MS of the 2nd EID of VM and the mapping relations of RLOC mapping request message by MR, by MS, mapping request message is sent to the 2nd VTEP.
Described equipment also comprises registering unit 404, for to MS registration the one EID of VM and the mapping relations of RLOC, according to described log-on message, the mapping request message receiving from the 2nd VTEP is transmitted to this equipment for MS.
Further, described encapsulation transmitting element 403, sends to a VM specifically for the MAC Address of the 2nd VM in the EID of described mapping relations is carried in arp reply message;
The target MAC (Media Access Control) address that receives a VM transmission is the message of the 2nd VM, searches the 2nd EID of VM and the mapping relations of RLOC according to the MAC Address of the 2nd VM, and obtaining corresponding RLOC is the IP address of the 2nd VTEP;
The IP address of the 2nd VTEP is carried out to VXLAN encapsulation as object IP to described message, the VXLAN message after encapsulation is sent to the 2nd VTEP, be transmitted to the 2nd VM by the 2nd VTEP.
Described equipment also comprises decapsulation transmitting element 405, for receiving the VXLAN message after encapsulation, VXLAN message after described encapsulation is descapsulated into initial data message, is a VM according to initial data message target MAC (Media Access Control) address and IP address, forwards this initial data message to the VM.
It should be noted that, a VTEP is identical with the 2nd VTEP function, just as the receiving end of message with while making a start, and role's difference.
Message forwarding method of the present invention, can bring following benefit:
One, the control plane agreement operation as VXLAN by LISP, realizes VXLAN and under multicast scenarios, can efficiently move not having;
Two, realizing EID by LISP is IP address, MAC Address, VXLAN ID three combination, has suppressed ARP flooding and learning process in core net;
Three, by the control plane function of LISP, realize the deployment of a large amount of VTEP.
The composition schematic diagram of the message forwarding equipment that Fig. 5 provides for further embodiment of this invention, as shown in Figure 5, it mainly comprises: CPU51 and internal memory 52, internal memory 52 comprises: mapping request unit 521, mapping relations unit 522, encapsulation transmitting element 523, registering unit 524, decapsulation transmitting element 525, wherein:
CPU51: for communicating with internal memory 52, carry out the computer program code in internal memory 52.
Mapping request unit 521: storage computer program code, completing steps in the time that this code is carried out by CPU51: receive the ARP request message that the first virtual machine VM sends, send mapping request message by mapped system to the 2nd VTEP, the endpoint identifier EID of the 2nd VM and the mapping relations of route location identifier RLOC under request the 2nd VTEP; Wherein, a VM and the 2nd VM have identical VNI.
Mapping relations unit 522: storage computer program code, completing steps in the time that this code is carried out by CPU51: receive the mapping response message that the 2nd VTEP returns, study the 2nd EID of VM and the mapping relations of RLOC; Wherein, EID is MAC Address, IP address and the affiliated VNI of the 2nd VM; RLOC is the IP address of the 2nd VTEP.
Encapsulation transmitting element 523: storage computer program code, completing steps in the time that this code is carried out by CPU51: reception the one VM sends to the message of the 2nd VM, according to the 2nd EID of VM and the mapping relations of RLOC of preserving, described message is carried out to VXLAN encapsulation, and send to the 2nd VTEP, be transmitted to the 2nd VM by the 2nd VTEP.
The target MAC (Media Access Control) address that receives a VM transmission is the message of the 2nd VM, searches the 2nd EID of VM and the mapping relations of RLOC according to the MAC Address of the 2nd VM, and obtaining corresponding RLOC is the IP address of the 2nd VTEP;
The IP address of the 2nd VTEP is carried out to VXLAN encapsulation as object IP to described message, the VXLAN message after encapsulation is sent to the 2nd VTEP, be transmitted to the 2nd VM by the 2nd VTEP.
The above, be only preferred embodiment of the present invention, is not intended to limit protection scope of the present invention.Within the spirit and principles in the present invention all, any modification of doing, be equal to replacement, improvement etc., within all should being included in protection scope of the present invention.
Claims (10)
1. a message forwarding method, the method comprises:
The first tunnel terminal VTEP receives the ARP request message that the first virtual machine VM sends, send mapping request message by mapped system to the 2nd VTEP, the endpoint identifier EID of the 2nd VM and the mapping relations of route location identifier RLOC under request the 2nd VTEP; Wherein, a VM and the 2nd VM have identical VNI;
The one VTEP receives the mapping response message that the 2nd VTEP returns, study the 2nd EID of VM and the mapping relations of RLOC; Wherein, EID is MAC Address, IP address and the affiliated VNI of the 2nd VM; RLOC is the IP address of the 2nd VTEP;
The one VTEP reception the one VM sends to the message of the 2nd VM, according to the 2nd EID of VM and the mapping relations of RLOC of preserving, described message is carried out to VXLAN encapsulation, and send to the 2nd VTEP, is transmitted to the 2nd VM by the 2nd VTEP.
2. the method for claim 1, is characterized in that, described mapped system comprises mapping resolver MR and mapping server MS;
The method that a described VTEP sends mapping request message by mapped system to the 2nd VTEP specifically comprises:
The one VTEP sends to MR according to ARP message by mapping request message, sends to registration to have the MS of the 2nd EID of VM and the mapping relations of RLOC mapping request message by MR, by MS, mapping request message is sent to the 2nd VTEP.
3. the method for claim 1, it is characterized in that, the one VTEP preserves an EID of VM and the mapping relations of RLOC, a described VTEP also, for to MS registration the one EID of VM and the mapping relations of RLOC, is transmitted to a corresponding VTEP according to described log-on message by the mapping request message receiving from the 2nd VTEP for MS.
4. the method for claim 1, it is characterized in that, described VTEP reception the one VM sends to the message of the 2nd VM, according to the 2nd EID of VM and the mapping relations of RLOC of preserving, described message is carried out to VXLAN encapsulation, and send to the 2nd VTEP, the method that is transmitted to the 2nd VM by the 2nd VTEP specifically comprises:
The one VTEP is carried at the MAC Address of the 2nd VM in the EID of described mapping relations in arp reply message, to send to a VM;
The target MAC (Media Access Control) address that the one VTEP receives a VM transmission is the message of the 2nd VM, searches the 2nd EID of VM and the mapping relations of RLOC according to the MAC Address of the 2nd VM, and obtaining corresponding RLOC is the IP address of the 2nd VTEP;
The one VTEP carries out VXLAN encapsulation as object IP to described message using the IP address of the 2nd VTEP, and the VXLAN message after encapsulation is sent to the 2nd VTEP, is transmitted to the 2nd VM by the 2nd VTEP.
5. the method for claim 1, it is characterized in that, the one VTEP is also for receiving the VXLAN message after encapsulation, the VXLAN message of the one VTEP after to described encapsulation is descapsulated into initial data message, be a VM according to initial data message target MAC (Media Access Control) address and IP address, forward this initial data message to the VM.
6. a message forwarding equipment, is applied to the first tunnel terminal VTEP, it is characterized in that, this equipment comprises:
Mapping request unit, the ARP request message sending for receiving the first virtual machine VM, send mapping request message by mapped system to the 2nd VTEP, the endpoint identifier EID of the 2nd VM and the mapping relations of route location identifier RLOC under request the 2nd VTEP; Wherein, a VM and the 2nd VM have identical VNI;
Mapping relations unit, for the mapping response message of receiving that the 2nd VTEP returns, study the 2nd EID of VM and the mapping relations of RLOC; Wherein, EID is MAC Address, IP address and the affiliated VNI of the 2nd VM; RLOC is the IP address of the 2nd VTEP;
Encapsulate transmitting element, send to the message of the 2nd VM for receiving a VM, according to the 2nd EID of VM and the mapping relations of RLOC of preserving, described message is carried out to VXLAN encapsulation, and send to the 2nd VTEP, be transmitted to the 2nd VM by the 2nd VTEP.
7. equipment as claimed in claim 6, it is characterized in that, described mapping request unit specifically for, according to ARP message, mapping request message is sent to MR, send to registration to have the MS of the 2nd EID of VM and the mapping relations of RLOC mapping request message by MR, by MS, mapping request message is sent to the 2nd VTEP.
8. equipment as claimed in claim 6, it is characterized in that, described equipment also comprises registering unit, for to MS registration the one EID of VM and the mapping relations of RLOC, according to described log-on message, the mapping request message receiving from the 2nd VTEP is transmitted to this equipment for MS.
9. equipment as claimed in claim 6, is characterized in that, described encapsulation transmitting element sends to a VM specifically for the MAC Address of the 2nd VM in the EID of described mapping relations is carried in arp reply message;
The target MAC (Media Access Control) address that receives a VM transmission is the message of the 2nd VM, searches the 2nd EID of VM and the mapping relations of RLOC according to the MAC Address of the 2nd VM, and obtaining corresponding RLOC is the IP address of the 2nd VTEP;
The IP address of the 2nd VTEP is carried out to VXLAN encapsulation as object IP to described message, the VXLAN message after encapsulation is sent to the 2nd VTEP, be transmitted to the 2nd VM by the 2nd VTEP.
10. equipment as claimed in claim 6, it is characterized in that, described equipment also comprises decapsulation transmitting element, for receiving the VXLAN message after encapsulation, VXLAN message after described encapsulation is descapsulated into initial data message, be a VM according to initial data message target MAC (Media Access Control) address and IP address, forward this initial data message to the VM.
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| CN201410110107.1A CN103841028B (en) | 2014-03-24 | 2014-03-24 | Method and device for forwarding messages |
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| CN201410110107.1A CN103841028B (en) | 2014-03-24 | 2014-03-24 | Method and device for forwarding messages |
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