CN109495366A - A kind of VXLAN message processing method, device and storage medium - Google Patents
A kind of VXLAN message processing method, device and storage medium Download PDFInfo
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- CN109495366A CN109495366A CN201710810474.6A CN201710810474A CN109495366A CN 109495366 A CN109495366 A CN 109495366A CN 201710810474 A CN201710810474 A CN 201710810474A CN 109495366 A CN109495366 A CN 109495366A
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- Prior art keywords
- message
- data message
- vxlan
- fragment
- tunnel
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Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
- H04L12/46—Interconnection of networks
- H04L12/4633—Interconnection of networks using encapsulation techniques, e.g. tunneling
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
- H04L12/46—Interconnection of networks
- H04L12/4641—Virtual LANs, VLANs, e.g. virtual private networks [VPN]
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L47/00—Traffic control in data switching networks
- H04L47/10—Flow control; Congestion control
- H04L47/36—Flow control; Congestion control by determining packet size, e.g. maximum transfer unit [MTU]
Abstract
The invention discloses a kind of VXLAN message processing method, device and storage mediums, are related to field of communication technology, which comprises whether the data message that VTEP judgement receives is message to be packaged；When the VTEP judges that the data message is message to be packaged, according to the length of the data message and the tunnel VXLAN transfer capability, it is determined whether need to carry out fragment processing to the data message；If it is determined that needing to carry out fragment processing to the data message, then the data message is subjected to fragment post package VXLAN head, and be forwarded.The embodiment of the present invention realizes VXLAN message fragment, solves the problems, such as the reconstructing failure of traditional sharding method.
Description
Technical field
The present invention relates to field of communication technology, in particular to a kind of virtual expansible local area network (Virtual
Extensible LAN, VXLAN) message processing method, device and storage medium.
Background technique
The Internet data center of cloud computing at present (Internet Data Center, IDC) internal structure is broadly divided into L2
And L3.In L2 structure, in a big local area network, communication and broadcast isolation are needed by virtual LAN all servers
(Virtual Local Area Network, VLAN).And VLAN only has 4096 in total, a physical server may be gathered around
There is several fictitious host computers (Virtual Machine, VM), and every VM possesses different MAC Address, it is clear that VLAN is not able to satisfy
Demand.
In addition in cloud computing IDC, it is desirable that server realizes virtualization, and server can migrate whenever and wherever possible, without
Change IP, at this moment just needs L2 network.However data center (Data Center, DC) internal server is not at one sometimes
It in region, needs to carry out L3 and gets through, L2 data are transmitted in L3 network, here it is covering (overlay) technologies.
To sum up two problems, VXLAN are born.VXLAN is the virtual networking of overlay a kind of, uses MAC in
The method of UDP is packaged, the encapsulated message head of totally 50 bytes, as shown in Figure 1.VXLAN is provided double layer network overlay
Ability on three-layer network, in VXLAN Header virtual process identifications (Virtual Network Identifier,
VNI) there is a 24bit, quantity is far longer than 4096, and User Datagram Protocol (User Datagram Protocol, UDP)
Encapsulation can pass through three-layer network, have better scalability than VLAN.
In the prior art, as shown in Fig. 2, virtual expansible local area network tunnel terminating node (Vxlan Tunnel End
Point, VTEP) between establish the tunnel VXLAN, it is envelope that user's message (i.e. data message), which is forwarded to another VTEP from a VTEP,
It is transmitted in VXLAN, it, can only be the maximum transmitted of VTEP outgoing interface if there are exceeding length data messages in network
Unit (Maximum Transmission Unit, MTU) could be forwarded with greatly.The message fragment of line card is needed in downlink
Fragment processing is carried out, if message has been more than the maximum MTU that VTEP outgoing interface can configure, VXLAN message passes through VTEP1
The message of sending is fragment message, and the first packet of fragment message is to encapsulate VXLAN head, rather than first packet message is not encapsulate
VXLAN, having arrived in VTEP2 equipment can be the non-first packet packet loss of no VXLAN heading, then receiving in empty machine 2
Message be dropped because of imperfect.It can only be evaded at present by change outgoing interface MTU method.
To sum up, although can be evaded by change outgoing interface MTU, use has limitation.It is required that between VTEP
The MTU of all nodes will be greater than message length.Once MTU value or maximum cannot be arranged by any one intermediate node occur
MTU value, which is less than message length so message, to be dropped.
Summary of the invention
A kind of VXLAN message processing method, device and storage medium provided in an embodiment of the present invention, solve VXLAN report
Message transmissions problem when text is larger.
A kind of VXLAN message processing method provided according to embodiments of the present invention, comprising:
Whether the data message that VTEP judgement receives is message to be packaged；
When the VTEP judges that the data message is message to be packaged, according to the length of the data message and
The tunnel VXLAN transfer capability, it is determined whether need to carry out fragment processing to the data message；
If it is determined that needing to carry out fragment processing to the data message, then the data message is subjected to fragment post package
VXLAN head, and be forwarded.
Preferably, whether the data message that the VTEP judgement receives is that message to be packaged includes:
After the VTEP receives data message, if the outgoing interface of the data message is the tunnel VXLAN, it is determined that the number
It is message to be packaged according to message.
Preferably, the length and the tunnel VXLAN transfer capability according to the data message, it is determined whether need to institute
Stating data message progress fragment processing includes:
If the length of the data message exceeds the tunnel VXLAN transfer capability, it is determined that need to the datagram
Text carries out fragment processing.
Preferably, the tunnel VXLAN transfer capability is determined according to the maximum transmission unit MTU value of the outgoing interface
's.
Preferably, described if it is determined that need to the data message carry out fragment processing, then the data message is carried out
Fragment post package VXLAN head, and be forwarded and include:
The VTEP carries out fragment according to the tunnel transfer capability, to the data message, obtains multiple fragment messages；
The VTEP searches the VXLAN head of the ID number comprising the tunnel VXLAN, and for described in the encapsulation of each fragment message
VXLAN head.
A kind of VXLAN message process device provided in an embodiment of the present invention, comprising:
Message judgment module, for judging whether the data message received is message to be packaged；
Fragment determining module, for when judging the data message is message to be packaged, according to the data message
Length and the tunnel VXLAN transfer capability, it is determined whether need to carry out fragment processing to the data message；
Message processing module (MPM) is used for if it is determined that needing to carry out fragment processing to the data message, then by the datagram
Text carries out fragment post package VXLAN head, and is forwarded.
Preferably, the message judgment module determines the number when the outgoing interface of the data message is the tunnel VXLAN
It is message to be packaged according to message.
Preferably, the fragment determining module exceeds the tunnel VXLAN transfer capability in the length of the data message
When, it determines and needs to carry out fragment processing to the data message.
Preferably, the message processing module (MPM) carries out fragment to the data message, obtains according to the tunnel transfer capability
To multiple fragment messages, the VXLAN head of the ID number comprising the tunnel VXLAN is searched, and for described in the encapsulation of each fragment message
VXLAN head.
Storage medium provided in an embodiment of the present invention, is stored thereon with the executable program of processor, which makes to handle
Device executes following steps:
Judge whether the data message received is message to be packaged；
When judging the data message is message to be packaged, turned according to the length of the data message and the tunnel VXLAN
Hair ability, it is determined whether need to carry out fragment processing to the data message；
If it is determined that needing to carry out fragment processing to the data message, then the data message is subjected to fragment post package
VXLAN head, and be forwarded.
Technical solution provided in an embodiment of the present invention has the following beneficial effects:
The embodiment of the present invention is realized realizes VXLAN message fragment on VTEP, thus avoid being dropped in message transmissions
Risk.
Detailed description of the invention
Fig. 1 is the VXLAN message format schematic diagram that the prior art provides；
Fig. 2 is the networking scene figure that the prior art provides；
Fig. 3 is VXLAN message processing method flow chart provided in an embodiment of the present invention；
Fig. 4 is VXLAN message process device block diagram provided in an embodiment of the present invention；
Fig. 5 is VXLAN fragment specific flow chart provided in an embodiment of the present invention.
Specific embodiment
Below in conjunction with attached drawing to a preferred embodiment of the present invention will be described in detail, it should be understood that described below is excellent
Select embodiment only for the purpose of illustrating and explaining the present invention and is not intended to limit the present invention.
Fig. 3 is VXLAN message processing method flow chart provided in an embodiment of the present invention, as shown in figure 3, step includes:
Whether the data message that step S101:VTEP judgement receives is message to be packaged.
After the VTEP receives data message, query routing forwarding table finds the outgoing interface of the data message, if gone out
Interface is the tunnel VXLAN, it is determined that the data message is the message to be packaged for needing packaging V XLAN.
Step S102: when the VTEP judges that the data message is message to be packaged, according to the data message
Length and the tunnel VXLAN transfer capability, it is determined whether need to carry out fragment processing to the data message.
If the length of the data message exceeds the tunnel VXLAN transfer capability, it is determined that need to the data
Message carries out fragment processing, wherein the tunnel VXLAN transfer capability is the maximum transmission unit MTU value according to the outgoing interface
Determining.
Step S103: if it is determined that needing to carry out fragment processing to the data message, then the data message is divided
Piece post package VXLAN head, and be forwarded.
The VTEP described first carries out fragment according to the tunnel transfer capability, to the data message, obtains multiple fragments
Message makes the forwarding of each fragment message in tunnel transfer capability.Then it includes the tunnel VXLAN that the VTEP, which is searched,
ID number VXLAN head, and encapsulate the VXLAN head for each fragment message.The last VTEP forwards packaging V XLAN head
Fragment message.
It will appreciated by the skilled person that implement the method for the above embodiments be can be with
Relevant hardware is instructed to complete by program, the program can store in computer-readable storage medium, should
Program when being executed, including step S101 to step S103.Furtherly, the present invention can also provide a kind of storage medium,
On be stored with the executable program of processor, which makes processor execute following steps: whether judging the data message received
It is message to be packaged；When judging the data message is message to be packaged, according to the length of the data message and VXLAN tunnel
Road transfer capability, it is determined whether need to carry out fragment processing to the data message；If it is determined that need to the data message into
The processing of row fragment, then carry out fragment post package VXLAN head for the data message, and be forwarded.Wherein, the storage is situated between
Matter may include ROM/RAM, magnetic disk, CD, USB flash disk.
Fig. 4 is VXLAN message process device block diagram provided in an embodiment of the present invention, as shown in figure 4, including that message judges mould
Block, fragment determining module and message processing module (MPM).
Message judgment module, for judging whether the data message received is message to be packaged.
Fragment determining module, for when judging the data message is message to be packaged, according to the data message
Length and the tunnel VXLAN transfer capability, it is determined whether need to carry out fragment processing to the data message.
Message processing module (MPM) is used for if it is determined that needing to carry out fragment processing to the data message, then by the datagram
Text carries out fragment post package VXLAN head, and is forwarded.
The course of work of described device is as follows: message judgment module finds the datagram by query routing forwarding table
The outgoing interface of text, if outgoing interface is the tunnel VXLAN, it is determined that the data message is message to be packaged.Fragment determining module
Further determine that whether the length of the data message exceeds the tunnel VXLAN transfer capability, if having exceeded the VXLAN
Tunnel transfer capability, it is determined that need to carry out fragment processing to the data message.At this point, message processing module (MPM) is according to the tunnel
Road transfer capability carries out fragment to the data message, obtains multiple fragment messages, and search comprising the tunnel VXLAN
The VXLAN head of ID number encapsulates the VXLAN head for each fragment message, then forwards.
It should be noted that if message processing module (MPM) is according to conventional place without departing from the tunnel VXLAN transfer capability
Reason mode handles the data message, i.e., without carrying out fragment processing, direct packaging V XLAN forwardings.
Wherein, the embodiment of the present invention realizes VXLAN message fragment, specifically, comprising:
1, VXLAN message encapsulation header (i.e. VXLAN) is generated on VTEP.
After VXLAN tunnel state on VTEP can be used, the message encapsulation header of VXLAN is generated, is forwarded convenient for message.In table
Contain the letter such as packaging information, including the tunnel VXLAN ID required for required various VXLAN headings when VXLAN forwarding
Breath.
2, MTU value corresponding to data message reality is calculated on VTEP.
Conventional process flow is after send user data message packaging V XLAN, again according to the MTU value of outgoing interface
It is forwarded after carrying out fragment.It is data message to be just subjected to fragment before packaging V XLAN, then incite somebody to action in the embodiment of the present invention
Upper VXLAN of data fragmentation message encapsulation forwards.
It needs to carry out fragment according to MTU_1 when data message fragment.Here the value of MTU_1 needs to calculate in advance
It arrives.The value MTU_1=MTU-50-4*VLAN Number of MTU_1 is calculated, wherein MTU value refers to the MTU of outgoing interface, and 50 refer to
VXLAN regular lengths, VLAN Number are the VLAN numbers of plies of outgoing interface band.It has thus obtained data message and has shifted to an earlier date fragment
Required MTU_1 value.
3, the data message process flow that length is greater than MTU_1 is received on VTEP.
After receiving data message on VTEP, first checks that it routes outgoing interface, go out if necessary to packaging V XLAN, then first
Its message length is parsed, and is compared with the value of MTU_1.If length be greater than MTU_1 value, just data message into
Row fragment, then each fragment data message packaging V XLAN forward.
The embodiment of the present invention calculates MTU value (the i.e. MTU_ of internal data message actual needs fragment according to VXLAN outgoing interface
1) attribute and fragment attribute, are encapsulated to downlink by message VXLAN on equipment uplink band, downlink completes fragment packaging V XLAN head again
The fragment of VXLAN message is realized in forwarding.
Router is illustrated as VTEP, VXLAN fragment specific implementation flow is as shown in figure 5, step includes:
Step 1: tunnel source and destination address route reachable, VXLAN tunnel-like after being configured with the tunnel VXLAN on router
State UP indicates that this tunnel VXLAN is available.At this moment a VXLAN encapsulation header can be generated on router, to router on forwarding
If it is this tunnel VXLAN that message, which routes outgoing interface, that is just needing encapsulation before the message forwarded above to be turned again for VXLAN
Hair.The ID number in the tunnel VXLAN is contained in encapsulation header.
Step 2: the tunnel VXLAN also corresponds to actual physics outgoing interface on router.There is MTU on outgoing interface, indicates to receive
To data message outer layer encapsulate again it is VXLAN upper after the maximum length that E-Packets no more than this MTU.The embodiment of the present invention
In be to allow data message before packaging V XLAN with regard to carrying out fragment, and MTU_1 needed for calculating data message fragment
Value.
Step 3: after router uplink line card (receiving the line card of message) receives message, first query routing forwarding table.
If outgoing interface is the tunnel VXLAN walked, the corresponding tunnel VXLAN ID number is obtained, and calculate the length of the data message received
Length1。
If Length1 is greater than MTU_1 value, just not packaging V XLAN head, marks data message.
Include in label:
1. marker bit, this needs flow uplink receiving end and to down forward end consensus, indicates that this data message needs
First fragment is wanted to go out for packaging V XLAN again；
2.MTU_1 value is according to this MTU_1 value for downlink line card (sending the line card of message) to data message point
Piece；
3.VXLAN Tunnel ID value, for the ease of finding correspondence according to Vxlan Tunnel ID value after data fragmentation
The VXLAN head that encapsulates of needs；
Certainly include in label head but also do not limit to above several values, depending on actual conditions.
Router uplink line card receives mark after message after pass directly to downlink line card.
If Length1 is less than or equal to MTU_1 value, line card uplink just directly looks into routing after receiving this message, encapsulates
VXLAN forwardings are lower to arrive line card downlink, then is directly forwarded by downlink.
Step 4:, if seeing that message has label, being extracted in label after downlink line card receives the message that uplink sends over
MTU_1 value, to data message carry out fragment.
Fragment message is firstly placed on buffer memory area by first preliminery application buffer memory area.After the completion of fragment, according in label
VXLAN Tunnel ID inquires the VXLAN head for needing to encapsulate, and by each fragment message packaging V XLAN head, then walks common turn
Hair process is gone out, while discharging caching.
In conclusion the embodiment of the present invention has following technical effect that
1. the fragment of VXLAN message may be implemented in the embodiment of the present invention, solves traditional sharding method bring recombination and lose
Lose problem；
2. the value of MTU_1 is just calculated according to the tunnel VXLAN outgoing interface before being message forwarding from forwarding performance
, a small amount of memory space is occupied, forwarding is had no effect on；
3. if comparing forwarding performance and existing message forwarding performance basic one after message length message does not need fragment
It causes.
Although describing the invention in detail above, but the invention is not restricted to this, those skilled in the art of the present technique
It can be carry out various modifications with principle according to the present invention.Therefore, all to be modified according to made by the principle of the invention, all it should be understood as
Fall into protection scope of the present invention.
Claims (10)
1. a kind of virtual expansible local area network VXLAN message processing method, comprising:
Whether the data message that virtual expansible local area network tunnel terminating node VTEP judgement receives is message to be packaged；
When the VTEP judges that the data message is message to be packaged, according to the length of the data message and VXLAN tunnel
Road transfer capability, it is determined whether need to carry out fragment processing to the data message；
If it is determined that needing to carry out fragment processing to the data message, then the data message is subjected to fragment post package VXLAN
Head, and be forwarded.
2. according to the method described in claim 1, whether the data message that VTEP judgement receives is that message to be packaged includes:
After the VTEP receives data message, if the outgoing interface of the data message is the tunnel VXLAN, it is determined that the datagram
Text is message to be packaged.
3. according to the method described in claim 1, the length and the tunnel VXLAN transfer capability according to the data message,
It determines the need for handling data message progress fragment and includes:
If the length of the data message exceed the tunnel VXLAN transfer capability, it is determined that need to the data message into
The processing of row fragment.
4. according to the method described in claim 3, the tunnel VXLAN transfer capability is the maximum transmitted according to the outgoing interface
What unit MTU value determined.
5. according to the method described in claim 1, described if it is determined that needing to carry out fragment processing to the data message, then by institute
It states data message and carries out fragment post package VXLAN head, and be forwarded and include:
The VTEP carries out fragment according to the tunnel transfer capability, to the data message, obtains multiple fragment messages；
The VTEP searches the VXLAN head of the ID number comprising the tunnel VXLAN, and for described in the encapsulation of each fragment message
VXLAN head.
6. a kind of virtual expansible local area network VXLAN message process device, comprising:
Message judgment module, for judging whether the data message received is message to be packaged；
Fragment determining module, for when judging the data message is message to be packaged, according to the length of the data message
With the tunnel VXLAN transfer capability, it is determined whether need to carry out fragment processing to the data message；
Message processing module (MPM), be used for if it is determined that need to the data message carry out fragment processing, then by the data message into
Row fragment post package VXLAN head, and be forwarded.
7. device according to claim 6, the message judgment module is VXLAN tunnel in the outgoing interface of the data message
When road, determine that the data message is message to be packaged.
8. device according to claim 6, the fragment determining module exceeds described in the length of the data message
When the tunnel VXLAN transfer capability, determines and need to carry out fragment processing to the data message.
9. device according to claim 6, the message processing module (MPM) is according to the tunnel transfer capability, to the data
Message carries out fragment, obtains multiple fragment messages, searches the VXLAN head of the ID number comprising the tunnel VXLAN, and is each point
Piece message encapsulates the VXLAN head.
10. a kind of storage medium is stored thereon with the executable program of processor, which makes processor execute following steps:
Judge whether the data message received is message to be packaged；
When judging the data message is message to be packaged, energy is forwarded according to the length of the data message and the tunnel VXLAN
Power, it is determined whether need to carry out fragment processing to the data message；
If it is determined that needing to carry out fragment processing to the data message, then the data message is subjected to fragment post package VXLAN
Head, and be forwarded.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710810474.6A CN109495366A (en) | 2017-09-11 | 2017-09-11 | A kind of VXLAN message processing method, device and storage medium |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710810474.6A CN109495366A (en) | 2017-09-11 | 2017-09-11 | A kind of VXLAN message processing method, device and storage medium |
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| CN201710810474.6A Withdrawn CN109495366A (en) | 2017-09-11 | 2017-09-11 | A kind of VXLAN message processing method, device and storage medium |
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| CN108282391A (en) * | 2018-01-11 | 2018-07-13 | 新华三技术有限公司 | A kind of VXLAN message fragmenting methods and device |
| CN110505138A (en) * | 2019-08-23 | 2019-11-26 | 杭州迪普科技股份有限公司 | Message forwarding method, device, electronic equipment and machine readable storage medium |
| CN113098780A (en) * | 2021-02-22 | 2021-07-09 | 网宿科技股份有限公司 | Message processing method of virtual network, electronic device and storage medium |
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