CN103841028B - 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 communication technology field, particularly to a kind of message forwarding method and equipment.
Background technology
In the multi-tenant environment of cloud computing, each tenant is required for distributing one and can be carried out very with other logic network
The logic network of good isolation.VLAN is typically passed through in the isolation of logic network（VLAN, Virtual Local Area
Network）Technology is solving.In IEEE802.1Q standard, due to the mark maximum 12bit of VLAN, so in certain limit
Maximum VLAN number only has 4K.Get more and more with the multi-tenant demand under cloud environment, 4K VLAN can not meet number
Demand according to the deployment of center large scale network.In addition, in cloud computing environment, live load is frequently necessary in multiple data centers
Migrated with multiple cloud platforms, and the region division being currently based on IP subnet is limited the application of two layer connectivitys.
VXLAN is a kind of MAC-in-UDP technology, and it passes through the one new network segmentation mould of 2.5 layers of setting in network
Formula, adds the segment identifier of a 24bit, has greatly expanded the number of the logic network that can be supported by cloud computing environment
Amount；And live load is departed from physical network, realizes logic network and cross over IP network.
VXLAN technology makes the multiple virtual machines in same VXLAN（VM, Virtual Machine）Can be across three-layer network
Network is communicated, and in VXLAN technology, each tenant corresponds to a virtual overlay network, and each virtual overlay network is considered as one
The individual VXLAN network segment, and by the virtual expansible local net network identifier of 24（VXLAN Network
Identifier, VNI）Mark.Only have between the VM of identical VNI and just allow to be communicated.
Fig. 1 is the networking schematic diagram of prior art data center network.Tunnel terminal（VTEP）A and VTEP B adheres to separately
In different data centers, in prior art, realize across data center interconnection, that is, the VM under VTEPA will with VTEP B under
Server realizes communication, has two schemes：Scheme one, VXLAN is run by multicast, needs to dispose multicast during operation.Scheme two,
VXLAN passes through Intermediate System-to-Intermediate System（IS-IS）Or border gateway routing protocol（BGP）Agreement is as control plane agreement
Run.
Taking scheme one as a example prior art is illustrated across the message forwarding method of data center, the method needs to specify
VNI is mapped to the multicast group of an IP network, and each VTEP of this VNI adds this multicast group, using flooding and study mechanism
Complete address learning, specifically include following steps：
Step 1, hypothesis VM server belong to same VNI, that is, broadly fall into VXLAN5000, so VXLAN5000 is mapped
To a multicast group, this multicast group IP is 239.1.1.1, and the VTEP B that the VTEP A that VM is connected, server are connected is
Add this multicast group；
Step 2, VM send ARP request message to VTEP A, the MAC Address of request server；
Step 3, VTEP A receive after ARP request broadcast ARP request in multicast group 239.1.1.1；
Step 4 and VTEP A have same VNI（VXLAN5000）VTEP B receive ARP request after, learn to VM
MAC Address and IP address 1.1.1.1 of VTEP A be stored in local mac list item, broadcast to each port of VXLAN5000 simultaneously
ARP request；
Step 5, server send corresponding arp reply message after receiving ARP request；
Step 6, VTEP B receive arp reply message, and unicast is sent to VTEP A；
Step 7, VTEP A receive arp reply message, learn the IP address of MAC Address to server and VTEPB
1.1.1.2 it is stored in local mac list item, and forward arp reply message to VM；
Step 8, VM send initial data message to VTEP A；
Step 9, VTEP A, according to local mac list item, inquire purpose MAC pair according to VXLAN ID and target MAC (Media Access Control) address
IP address 1.1.1.2 of the VTEP B answering, packaging V XLAN message, it is transmitted to VTEP B；
Step 10, VTEP B receive VXLAN message, peel off VXLAN outer envelope, according to VXLAN ID and purpose MAC
Message is issued corresponding server by address.
It can be seen from the above description that prior art is across the message forwarding method of data center, if adopting scheme one, need
Multicast to be disposed, the VTEP of Liang Ge data center is added same multicast group, otherwise, if when across data center interconnection, by
In not opening multicast, lead to not run；Meanwhile, by flood and study mechanism learn MAC, inefficiency.
And, if realizing forwarding across the message of data center using scheme two, need to set up between VTEP substantial amounts of
IS-IS or bgp neighbor, Dynamic Maintenance neighborhood, when VTEP quantity is more, it is limited to neighbours' rule of IS-IS or BGP itself
Lattice.
Content of the invention
It is an object of the invention to provide a kind of message forwarding method and equipment, being capable of VXLAN is not having multicast feelings
Effec-tive Function under condition.
For achieving the above object, the invention provides a kind of message forwarding method, the method includes：
First tunnel terminal VTEP receives the ARP request message that the first virtual machine VM sends, by mapped system
Send mapping request message, the endpoint identifier EID of the 2nd VM under request the 2nd VTEP and route location mark to the 2nd VTEP
Know the mapping relations of symbol RLOC；Wherein, a VM and the 2nd VM has identical VNI；
First VTEP receives the mapping response message that the 2nd VTEP returns, and the mapping of EID and RLOC of study the 2nd VM is closed
System；Wherein, EID is MAC Address, IP address and the affiliated VNI of the 2nd VM；RLOC is the IP address of the 2nd VTEP；
First VTEP receives the message that a VM is sent to the 2nd VM, EID's and RLOC according to the 2nd VM preserving reflects
Penetrate relation, VXLAN encapsulation is carried out to described message, and be sent to the 2nd VTEP, the 2nd VM is transmitted to by the 2nd VTEP.
For achieving the above object, present invention also offers a kind of message forwarding equipment, it is applied to the first tunnel
Terminal VTEP, this equipment includes：
Mapping request unit, for receiving the ARP request message that the first virtual machine VM sends, by mapped system to the
Two VTEP send mapping request message, the endpoint identifier EID of the 2nd VM under request the 2nd VTEP and route location identifier
The mapping relations of RLOC；Wherein, a VM and the 2nd VM has identical VNI；
Mapping relations unit, for receive the 2nd VTEP return mapping response message, study the 2nd VM EID 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 of the 2nd VTEP
Address；
Encapsulation transmitting element, is sent to the message of the 2nd VM for receiving a VM, the EID according to the 2nd VM preserving and
The mapping relations of RLOC, carry out VXLAN encapsulation to described message, and are sent to the 2nd VTEP, are transmitted to second by the 2nd VTEP
VM.
In sum, the embodiment of the present invention the first tunnel terminal VTEP receives the ARP that the first virtual machine VM sends
Request message, sends mapping request message, the end points of the 2nd VM under request the 2nd VTEP by mapped system to the 2nd VTEP
Identifier EID and the mapping relations of route location identifier RLOC；Wherein, a VM and the 2nd VM has identical VNI；First
VTEP receives the mapping response message that the 2nd VTEP returns, the mapping relations of EID and RLOC of study the 2nd VM；Wherein, EID is
The MAC Address of the 2nd VM, IP address and affiliated VNI；RLOC is the IP address of the 2nd VTEP；First VTEP receives a VM and sends out
Give the message of the 2nd VM, the mapping relations of EID and RLOC according to the 2nd VM preserving, VXLAN envelope is carried out to described message
Dress, and it is sent to the 2nd VTEP, the 2nd VM is transmitted to by the 2nd VTEP.Compared with prior art, decrease ARP in core net
Flood, it is to avoid flood and study mechanism, in the case of there are currently no multicast in fact, VXLAN being capable of Effec-tive Function.
Brief description
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 provides a networking schematic diagram of method application for the embodiment of the present invention.
Fig. 4 is the structural representation of the message forwarding equipment being applied to 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.
Specific embodiment
For making the objects, technical solutions and advantages of the present invention become more apparent, develop simultaneously embodiment referring to the drawings, right
Scheme of the present invention is described in further detail.
The core concept of the present invention is, runs VXLAN and position and identity separated protocol within the core network simultaneously
（LISP, Locator/Identity Separation Protocol）, LISP as the control plane agreement of VXLAN, but not
As the message encapsulation of datum plane, datum plane is still sent and received with VXLAN encapsulation.So, mutual across data center
Lian Shi, does not have under multicast scenarios, can run VXLAN yet, simultaneously by LISP protocol come aware host, the correspondence of MAC and VTEP
Relation is it is not necessary to the study mechanism that floods of datum plane.By the method for the present invention, decrease ARP flooding in core net, keep away
Exempt to flood and study mechanism, in the case of there are currently no multicast in fact, VXLAN being capable of Effec-tive Function.
Lower mask body introduces LISP involved in the present invention, and in prior art, LISP is a kind of position and mark point
From networking thought, formed two independent address spaces：Endpoint identifier（EID, Endpoint Identifier）Address is empty
Between and route location identifier（RLOC, Routing Locator）Address space.EID is the host address of communication end point, with now
Realize identical, the effect in LISP is similar to domain name system（DNS）, have independent space.In LISP network, EID
Can be migrated independent of RLOC, RLOC be LISP router address, can in existing the Internet routing forwarding, can the overall situation
Route, and be polymerized according to network topology situation.Between EID, the message of communication is encapsulated in the tunnel between RLOC and carries out turning
Send out.LISP can be divided into control plane data plane by function.Control plane completes the mapping relations of EID and RLOC, by reflecting
Penetrate the mapping relations that request message asks specific EID/RLOC, respond mapping request message by mapping response message.Data
Plane completes mapping and encapsulation, decapsulation, is encapsulated as LISP encapsulation in LISP network.
Based on the above-mentioned description to existing LISP, the method for the present invention make use of LISP control plane to complete EID and RLOC
Mapping relations, by the mapping relations of the specific EID/RLOC of mapping request message request, by mapping response message response
Mapping request message.And, in the present invention, the EID of LISP is the group of VM main frame, the MAC Address of VM and VXLAN ID three
Close, RLOC is the IP address of VTEP, the tunnel router of LISP（xTR）Safeguard the mapping relations of EID and RLOC, dynamically note to MS
Volume.Here illustratively, because LISP of the present invention runs as the control plane agreement of VXLAN, the xTR of LISP safeguard EID and
The mapping relations of RLOC, to MS dynamic registration, so when the present invention runs LISP within the core network, the VTEP equipment of VXLAN
Have and xTR identical function, that is, on VTEP（On xTR）, to the IP address of LISP dynamic registration VM main frame, MAC Address,
VXLAN ID and the mapping relations of VTEP address.But, datum plane of the present invention is still sent and received with VXLAN encapsulation.
Embodiment of the present invention message forwarding method comprises the following steps, and its schematic flow sheet is as shown in Figure 2.Wherein, first
VTEP and the 2nd VTEP belongs to different websites, and different websites can be in same data center it is also possible at different pieces of information center.
Step 201, a VTEP receive the ARP request message that the first virtual machine VM sends, by mapped system to the
Two VTEP send mapping request message, the endpoint identifier EID of the 2nd VM under request the 2nd VTEP and route location identifier
The mapping relations of RLOC；Wherein, a VM and the 2nd VM has identical VNI；
Specifically, a VTEP receive under this equipment that the first virtual machine VM sends under request the 2nd VTEP second
After the ARP request message of the MAC Address of VM, mapping request report is sent to the 2nd VTEP by mapped system
Literary composition, the mapping relations of EID and RLOC of request the 2nd VM.
Wherein, mapped system includes Mapping Resolution device MR and mapping server MS；
First VTEP is specifically included by the method that mapped system sends mapping request message to the 2nd VTEP：
Mapping request message is sent to MR according to ARP message by the first VTEP, is sent to mapping request message by MR
Register with the MS of the mapping relations of EID and RLOC of the 2nd VM, mapping request message is sent to by the 2nd VTEP by MS.If
Now on MS EID and RLOC of also unregistered 2nd VM mapping relations, then pass through MR to the first VTEP feedback abandon this mapping
Request message, because the log-on message on MS is Dynamic Maintenance, thus also carry in the dropping packets being fed back it is allowed to
First VTEP sends the time interval of mapping request message again to MR.
Wherein, the 2nd VTEP preserves the mapping relations of EID and RLOC of the 2nd VM, and this mapping is closed by the therefore the 2nd VTEP
It is to MS registration, according to described log-on message, the mapping request message receiving from a VTEP is transmitted to for MS corresponding
2nd VTEP.
Step 202, a VTEP receive the mapping response message that the 2nd VTEP returns, EID and RLOC of study the 2nd VM
Mapping relations；Wherein, EID is MAC Address, IP address and the affiliated VNI of the 2nd VM；RLOC is the IP ground of the 2nd VTEP
Location；
Wherein, the MAC of the 2nd VM after a VTEP learns the mapping relations of EID and RLOC of the 2nd VM, is obtained according to EID
Address and the corresponding relation of IP address, and preserve this mapping relations and the MAC Address of the 2nd VM and the corresponding relation of IP address.
Step 203, a VTEP receive a VM and are sent to the message of the 2nd VM, the EID according to the 2nd VM preserving and
The mapping relations of RLOC, carry out VXLAN encapsulation to described message, and are sent to the 2nd VTEP, are transmitted to second by the 2nd VTEP
VM.
It is implemented as, a VTEP carries the MAC Address of the 2nd VM in the EID of described mapping relations in arp reply
It is sent to a VM in message；
The target MAC (Media Access Control) address that first VTEP receives a VM transmission is the initial data message of the 2nd VM, according to the 2nd VM
MAC Address search the 2nd VM EID and RLOC mapping relations, obtain corresponding RLOC be the 2nd VTEP IP address；
The IP address of the 2nd VTEP is carried out VXLAN encapsulation as purpose IP to described initial data message by the first VTEP,
VXLAN message after encapsulation is sent to the 2nd VTEP；
After 2nd VTEP receives the VXLAN message after encapsulation, 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 extremely
2nd VM.
For the clear explanation present invention, concrete scene is set forth below and is described in detail.The present invention is using LISP as VXLAN's
Control plane agreement is run, and therefore also the xTR equipment as LISP runs the VTEP equipment of VXLAN, and the present invention is also adopted by
Mapped system in LISP.MR and MS is employed, MR and MS can be same equipment or difference in mapped system
Equipment.Following is a brief introduction of mapped system operation principle, identical with its operation principle in LISP.If MR and MS
It is same equipment, mapping request message is directly issued MS by MR；If not same equipment, then MS is allowed to have multiple stage, example
If any MS1 and MS2, there are two kinds of implementations：First, MS1 registers the map information of VTEP associated by some, and MS2 registers with
The map information of VTEP associated by another part, MR sets up bgp neighbor respectively with MS1, MS2, the mapping letter on synchronous MS1, MS2
Breath, such MR just has the map information of all VTEP, MR is known which MS mapping request message issues；2nd, set
Putting a MS1 is root device, and other MS are node device, and each node device registers with the mapping letter of each associated VTEP
Breath, mapping request message is first issued MS1 by MR, then issues other corresponding MS by MS1.
Fig. 3 provides a networking schematic diagram of method application for the embodiment of the present invention.VTEP A and VTEP B belongs to not
Website in same data center, VM1 and VM2 has identical VNI, MR and MS of mapped system is located on same equipment.This
The VM1 that the purpose of invention is under VTEP A will realize communicating with the VM2 under VTEP B, and concrete grammar includes：
Step S1, first, VM2 moves to VTEP2（xTR2）Under, that is, after moving to affiliated Site2, then in Site2
VTEP2 notices MAC Address and the IP address of itself, and VTEP2 distributes VNI for VM2 simultaneously.At this moment, VTEP2 just can safeguard VM2
EID and RLOC mapping relations, wherein EID is the Mac address of VM2, IP address and VNIID, specially：Mac2、VNI1、
IP2；RLOC is the IP address of VTEP2, specially IP B；Then, VTEP2 registers the EID/RLOC of VM2 to MS, and MS is thus preserve
There is the EID/RLOC of VM2.
Step S2, VTEP1（xTR1）Under VM1（Belong to Site1）Send ARP request to VTEP1, request address is：IP2
MAC.
After step S3, VTEP1 receives ARP request, ARP is not flooded within the core network, but controlled by LISP flat
Face, sends mapping request message（Map-request）To VTEP2, ask the mapping relations of EID and RLOC of VM2, wherein, please
EID is asked to be (VNI1, IP2, *)；
Specifically, mapping request message is the MR/MS route system by LISP, is forwarded to VTEP2；
Wherein, MR receives the mapping request message of VTEP1 transmission, and according to the EID prefix route letter in mapping network
Breath, message is sent to corresponding MS；
MS be stored with VTEP2 registration map information, according to log-on message, the mapping request receiving message is transmitted to
Corresponding VTEP2.
Step S4, VTEP2 directly replys mapping response message（Map-response）To VTEP1, the EID of return is：
(VNI1, IP2, MAC2), RLOC is：IP B.
Step S5, VTEP1 is saved in the EID/RLOC of VM2 in local cache, and subsequent execution ARP proxy function, to VM1
Reply arp reply, Mac2 is replied to VM1 by arp reply；
Specifically, VTEP1 can preserve two parts content, and a part is the mapping relations of EID and RLOC of VM2, one
Divide the corresponding relation of IP and MAC being VM2：Mac2：IP2.
Step S6, VM1 sends datagram to VM2, and it is VM2 that data message carries purpose IP and purpose MAC, is first sent to
VTEP1.
Step S7, VTEP1 is IP B according to the purpose MAC Mac2 of VM2, the corresponding RLOC of lookup, is encapsulated by VXLAN,
Send datagram to VTEP2；
Wherein, VXLAN encapsulates the IP address IP B that purpose IP is VTEP2, and source IP is the IP address IP A of VTEP1.
After step S8, VTEP2 receives VXLAN message, decapsulated, then original two layer message is transmitted to
VM2；
Wherein, solution VXLAN encapsulation is exactly to solve UDP encapsulation, and then purpose MAC according to initial data message and purpose IP will
Data message forwarding is to VM2.
So far, complete the communication of the span data center of 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 has for the present invention
It is applied to the structural representation of the message forwarding equipment of said method in body embodiment.This message forwarding equipment, is applied to first
VTEP, including：
Mapping request unit 401, for receiving the ARP request message that the first virtual machine VM sends, by mapped system
Send mapping request message, the endpoint identifier EID of the 2nd VM under request the 2nd VTEP and route location mark to the 2nd VTEP
Know the mapping relations of symbol RLOC；Wherein, a VM and the 2nd VM has identical VNI；
Mapping relations unit 402, for receiving the mapping response message that the 2nd VTEP returns, study the 2nd VM's
The mapping relations of EID and RLOC；Wherein, EID is MAC Address, IP address and the affiliated VNI of the 2nd VM；RLOC is second
The IP address of VTEP；
Encapsulation transmitting element 403, is sent to the message of the 2nd VM for receiving a VM, according to the 2nd VM's preserving
The mapping relations of EID and RLOC, carry out VXLAN encapsulation to described message, and are sent to the 2nd VTEP, are transmitted to by the 2nd VTEP
2nd VM.
Further, described mapping request unit 401 is specifically for being sent to mapping request message according to ARP message
Mapping request message is sent to the MS of the mapping relations of EID and RLOC registering with the 2nd VM by MR by MR, will be reflected by MS
Penetrate request message and be sent to the 2nd VTEP.
Described equipment also includes registering unit 404, for registering the mapping relations of EID and RLOC of a VM to MS, uses
In MS, the mapping request message receiving from the 2nd VTEP is transmitted to by this equipment according to described log-on message.
Further, described encapsulation transmitting element 403, specifically for by the MAC of the 2nd VM in the EID of described mapping relations
Address carries and is sent to a VM in arp reply message；
The target MAC (Media Access Control) address receiving a VM transmission is the message of the 2nd VM, and the MAC Address according to the 2nd VM searches second
The mapping relations of EID and RLOC of VM, obtain the IP address that corresponding RLOC is the 2nd VTEP；
The IP address of the 2nd VTEP is carried out VXLAN encapsulation as purpose IP to described message, by the VXLAN report after encapsulation
Literary composition is sent to the 2nd VTEP, is transmitted to the 2nd VM by the 2nd VTEP.
Described equipment also includes decapsulating transmitting element 405, for receiving the VXLAN message after encapsulation, to described encapsulation
VXLAN message afterwards carries out being descapsulated into initial data message, is the according to initial data message target MAC (Media Access Control) address and IP address
One VM, forwards this initial data message to a VM.
It should be noted that a VTEP and the 2nd VTEP function phase are same, when being intended only as the receiving end of message and making a start, angle
Color is different.
The message forwarding method of the present invention, can bring following benefit：
First, run as the control plane agreement of VXLAN by LISP, realize VXLAN under there is no multicast scenarios, can
Effec-tive Function；
2nd, by LISP realize EID be IP address, MAC Address, VXLAN ID three combine it is suppressed that ARP is in core net
Flood and learning process；
3rd, 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 is main
Including：CPU51 and internal memory 52, internal memory 52 includes：Mapping request unit 521, mapping relations unit 522, encapsulation sends single
Unit 523, registering unit 524, decapsulate transmitting element 525, wherein：
CPU51：Computer program code for being communicated with internal memory 52, in execution internal memory 52.
Mapping request unit 521：Storage computer program code, completes step when this code is executed by CPU51：Receive
The ARP request message sending to the first virtual machine VM, sends mapping request message, request the by mapped system to the 2nd VTEP
The mapping relations of the endpoint identifier EID of the 2nd VM under two VTEP and route location identifier RLOC；Wherein, a VM and
Two VM have identical VNI.
Mapping relations unit 522：Storage computer program code, completes step when this code is executed by CPU51：
Receive the mapping response message that the 2nd VTEP returns, the mapping relations of EID and RLOC of study the 2nd VM；Wherein, EID is second
The MAC Address of VM, IP address and affiliated VNI；RLOC is the IP address of the 2nd VTEP.
Encapsulation transmitting element 523：Storage computer program code, completes step when this code is executed by CPU51：Receive
First VM is sent to the message of the 2nd VM, the mapping relations of EID and RLOC according to the 2nd VM preserving, and described message is carried out
VXLAN encapsulates, and is sent to the 2nd VTEP, is transmitted to the 2nd VM by the 2nd VTEP.
Mapping request unit 521, specifically for storing computer program code, completes when this code is executed by CPU51
Step：Mapping request message is sent to by MR according to ARP message, by MR, mapping request message is sent to and registers with the 2nd VM
The mapping relations of EID and RLOC MS, mapping request message is sent to by the 2nd VTEP by MS.
Internal memory 52 further includes：Registering unit 524, for storing computer program code, when this code is held by CPU51
Step is completed during row：Register the mapping relations of EID and RLOC of a VM to MS, will be from the according to described log-on message for MS
The mapping request message that two VTEP receive is transmitted to this equipment.
Encapsulation transmitting element 523, specifically for storing computer program code, completes when this code is executed by CPU51
Step：The MAC Address of the 2nd VM in the EID of described mapping relations is carried and is sent to a VM in arp reply message；
The target MAC (Media Access Control) address receiving a VM transmission is the message of the 2nd VM, and the MAC Address according to the 2nd VM searches second
The mapping relations of EID and RLOC of VM, obtain the IP address that corresponding RLOC is the 2nd VTEP；
The IP address of the 2nd VTEP is carried out VXLAN encapsulation as purpose IP to described message, by the VXLAN report after encapsulation
Literary composition is sent to the 2nd VTEP, is transmitted to the 2nd VM by the 2nd VTEP.
Internal memory 52 further includes：Decapsulation transmitting element 525, for storing computer program code, when this code quilt
Step is completed during CPU51 execution：Receive the VXLAN message after encapsulation, the 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 extremely
First VM.
The above, only presently preferred embodiments of the present invention, it is not intended to limit protection scope of the present invention.All
Within the spirit and principles in the present invention, any modification, equivalent substitution and improvement made etc., should be included in the protection of the present invention
Within the scope of.
Claims (10)
1. a kind of message forwarding method, the method includes：
First tunnel terminal VTEP receives the ARP request message that the first virtual machine VM sends, by mapped system to the
Two VTEP send mapping request message, the endpoint identifier EID of the 2nd VM under request the 2nd VTEP and route location identifier
The mapping relations of RLOC；Wherein, a VM and the 2nd VM has identical virtual expansible local net network identifier VNI；
First VTEP receives the mapping response message that the 2nd VTEP returns, the mapping relations of EID and RLOC of study the 2nd VM；Its
In, EID is MAC Address, IP address and the affiliated VNI of the 2nd VM；RLOC is the IP address of the 2nd VTEP；
First VTEP receives the message that a VM is sent to the 2nd VM, and the mapping of EID and RLOC according to the 2nd VM preserving is closed
System, carries out virtual expansible LAN VXLAN encapsulation, and is sent to the 2nd VTEP, be transmitted to by the 2nd VTEP to described message
2nd VM.
2. the method for claim 1 is it is characterised in that described mapped system includes Mapping Resolution device MR and mapping services
Device MS；
A described VTEP is specifically included by the method that mapped system sends mapping request message to the 2nd VTEP：
Mapping request message is sent to MR according to ARP message by the first VTEP, by MR, mapping request message is sent to registration
There is the MS of the mapping relations of EID and RLOC of the 2nd VM, mapping request message is sent to by the 2nd VTEP by MS.
3. the method for claim 1 is it is characterised in that a VTEP preserves the mapping of EID and RLOC of a VM
Relation, a described VTEP is additionally operable to register the mapping relations of EID and RLOC of a VM to MS, for MS according to described registration
The mapping request message receiving from the 2nd VTEP is transmitted to a corresponding VTEP by information.
4. the method for claim 1 is it is characterised in that a described VTEP receives the report that a VM is sent to the 2nd VM
Literary composition, the mapping relations of EID and RLOC according to the 2nd VM preserving, VXLAN encapsulation is carried out to described message, and is sent to second
VTEP, is specifically included by the method that the 2nd VTEP is transmitted to the 2nd VM：
The MAC Address of the 2nd VM in the EID of described mapping relations is carried and is sent to first in arp reply message by the first VTEP
VM；
The target MAC (Media Access Control) address that first VTEP receives a VM transmission is the message of the 2nd VM, and the MAC Address according to the 2nd VM is searched
The mapping relations of EID and RLOC of the 2nd VM, obtain the IP address that corresponding RLOC is the 2nd VTEP；
The IP address of the 2nd VTEP is carried out VXLAN encapsulation as purpose IP by the first VTEP to described message, after encapsulation
VXLAN message is sent to the 2nd VTEP, is transmitted to the 2nd VM by the 2nd VTEP.
5. the method for claim 1 is it is characterised in that a VTEP is additionally operable to the VXLAN message after receiving encapsulation, and the
One VTEP carries out being descapsulated into initial data message to the VXLAN message after described encapsulation, according to initial data message purpose MAC
Address and IP address are a VM, forward this initial data message to a VM.
6. a kind of message forwarding equipment, is applied to the first tunnel terminal VTEP it is characterised in that this equipment includes：
Mapping request unit, for receiving the ARP request message that the first virtual machine VM sends, by mapped system to second
VTEP sends mapping request message, the endpoint identifier EID of the 2nd VM under request the 2nd VTEP and route location identifier
The mapping relations of RLOC；Wherein, a VM and the 2nd VM has identical virtual expansible local net network identifier VNI；
Mapping relations unit, for receiving the mapping response message that the 2nd VTEP returns, EID and RLOC of study the 2nd VM
Mapping relations；Wherein, EID is MAC Address, IP address and the affiliated VNI of the 2nd VM；RLOC is the IP ground of the 2nd VTEP
Location；
Encapsulation transmitting element, is sent to the message of the 2nd VM for receiving a VM, according to EID and RLOC of the 2nd VM preserving
Mapping relations, described message is carried out with virtual expansible LAN VXLAN encapsulation, and is sent to the 2nd VTEP, by second
VTEP is transmitted to the 2nd VM.
7. equipment as claimed in claim 6 is it is characterised in that described mapping request unit is specifically for inciting somebody to action according to ARP message
Mapping request message is sent to MR, and mapping request message is sent to the mapping of EID and RLOC registering with the 2nd VM by MR
Mapping request message is sent to the 2nd VTEP by MS by the MS of relation.
8. equipment as claimed in claim 6 is it is characterised in that described equipment also includes registering unit, for MS registration the
The mapping relations of EID and RLOC of one VM, the mapping request that will be received from the 2nd VTEP according to described log-on message for MS
Message is transmitted to this equipment.
9. equipment as claimed in claim 6 is it is characterised in that described encapsulation transmitting element, specifically for closing described mapping
In the EID of system, the MAC Address of the 2nd VM carries and is sent to a VM in arp reply message；
The target MAC (Media Access Control) address receiving a VM transmission is the message of the 2nd VM, and the MAC Address according to the 2nd VM searches the 2nd VM's
The mapping relations of EID and RLOC, obtain the IP address that corresponding RLOC is the 2nd VTEP；
The IP address of the 2nd VTEP is carried out VXLAN encapsulation as purpose IP to described message, the VXLAN message after encapsulation is sent out
Give the 2nd VTEP, the 2nd VM is transmitted to by the 2nd VTEP.
10. equipment as claimed in claim 6 is it is characterised in that described equipment also includes decapsulating transmitting element, for receiving
VXLAN message after encapsulation, carries out being descapsulated into initial data message to the VXLAN message after described encapsulation, according to original number
It is a VM according to message target MAC (Media Access Control) address and IP address, forward this initial data message to a VM.
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