CN104104747B - Message transmitting method and device - Google Patents
Message transmitting method and device Download PDFInfo
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- CN104104747B CN104104747B CN201410362933.5A CN201410362933A CN104104747B CN 104104747 B CN104104747 B CN 104104747B CN 201410362933 A CN201410362933 A CN 201410362933A CN 104104747 B CN104104747 B CN 104104747B
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Abstract
The present invention provides a kind of message transmitting method and device, and applied to the VXLAN tunnel ends node VTEP equipment of the dynamic host configuration protocol DHCP server side in expansible Virtual Local Area Network VXLAN networkings, this method includes：When receiving dhcp client request message from VXLAN tunnels, the corresponding VXLAN network identifiers VNI in tunnel face for receiving the dhcp client request message is added in the dhcp client request message and sent to Dynamic Host Configuration Protocol server, so that the Dynamic Host Configuration Protocol server is according to the address that the VNI is that the dhcp client distributes corresponding address section.By technical scheme, Dynamic Host Configuration Protocol server can directly recognize the VXLAN belonging to current dhcp client request message according to VNI information, so that it is guaranteed that distributing correct IP address for corresponding dhcp client.
Description
Technical field
The present invention relates to communication technical field, more particularly to message transmitting method and device.
Background technology
VXLAN (Virtual Extensible LAN, expansible Virtual Local Area Network) is one big double layer network, identical
VXLAN virtual machine (VM, Virtual Machine) is in same logic double layer network, between different VXLAN logic every
From.Local edge device is divided and two layers of forwarding according to VXLAN to local VM, and local terminal edge device is set to end edges
The preparation Wen Shihui that delivers newspaper adds the VXLAN network identities head and tunnel UDP heads of native virtual machine, and by the VXLAN pre-established
Tunnel forwards the packet to end edges equipment, then end edges equipment is unsealed to UDP and VXLAN network identity heads
After dress, opposite end VM is given by message, so as to complete the message transmissions between local VM and opposite end VM.
VM as dhcp client, it is necessary to Dynamic Host Configuration Protocol server applied address, and due between different VXLAN logic every
From, it is necessary to each VXLAN configures a Dynamic Host Configuration Protocol server.However, as a large number of users is accessed in VXLAN networkings, it is required
The quantity of Dynamic Host Configuration Protocol server be consequently increased, so as to take ample resources.
In correlation technique, it is proposed that select a VM as Dynamic Host Configuration Protocol server in VXLAN networkings, be other by the VM
Dhcp client distributes address.However, when some VM are as Dynamic Host Configuration Protocol server, can not effectively distinguish dhcp client transmission
DHCP message in TAG (be located at Ethernet head (Ethernet Head) in VLAN ID Tag fields) so that can not
Enough correct IP address is distributed for different VXLAN VM.
The content of the invention
In view of this, the present invention provides a kind of new technical scheme, can solve part Dynamic Host Configuration Protocol server in correlation technique
The technical problem of TAG in None- identified DHCP message.
To achieve the above object, present invention offer technical scheme is as follows：
According to the first aspect of the invention, it is proposed that a kind of message transmitting method, applied to expansible Virtual Local Area Network
The VXLAN tunnel ends node VTEP equipment of dynamic host configuration protocol DHCP server side in VXLAN networkings, including：
When receiving dhcp client request message from VXLAN tunnels, the dhcp client request message will be received
The corresponding VXLAN network identifiers VNI in tunnel face be added to the dhcp client request message in and send to DHCP clothes
Business device, so that the Dynamic Host Configuration Protocol server is according to the address that the VNI is that the dhcp client distributes corresponding address section.
According to the second aspect of the invention, it is proposed that a kind of message transmitting device, applied to expansible Virtual Local Area Network
The VXLAN tunnel ends node VTEP equipment of dynamic host configuration protocol DHCP server side in VXLAN networkings, including：
Adding device, for the DHCP visitors when receiving dhcp client request message from VXLAN tunnels, will to be received
The corresponding VXLAN network identifiers VNI in tunnel face of family end request message is added in the dhcp client request message；
Transmitting element, for the dhcp client request message that with the addition of the VNI to be sent to Dynamic Host Configuration Protocol server, so that
The Dynamic Host Configuration Protocol server is according to the address that the VNI is that the dhcp client distributes corresponding address section.
It is of the invention by parsing the VNI in dhcp client request message by VTEP from above technical scheme, and
The VNI is encapsulated in DHCP message so that Dynamic Host Configuration Protocol server can directly recognize current dhcp client according to VNI information
VXLAN belonging to request message, so that it is guaranteed that distributing correct IP address for corresponding dhcp client.
Brief description of the drawings
Fig. 1 shows the schematic network structure according to one example embodiment of the present invention；
Fig. 2 shows the schematic flow diagram of the message transmitting method according to one example embodiment of the present invention；
Fig. 3 shows option structures in the dhcp client request message according to one example embodiment of the present invention
Schematic diagram；
Fig. 4 shows the schematic flow diagram of message transmitting method in accordance with an alternative illustrative embodiment of the present invention；
Fig. 5 shows the schematic block diagram of the message transmitting device according to one example embodiment of the present invention.
Embodiment
Please to Dynamic Host Configuration Protocol server by the virtual machine facility (VM, Virtual Manufacturing) in VXLAN networks
Ask the distribution of IP address.As stated in the Background Art, due to logic isolation between different VXLAN, then as a kind of embodiment,
Proposed in correlation technique and independent Dynamic Host Configuration Protocol server is configured for each VXLAN, then every Dynamic Host Configuration Protocol server need not be to difference
VXLAN makes a distinction, but can cause to take excessive resource.In order to solve to take the excessive technical problem of resource, correlation technique
In further provide and configure same Dynamic Host Configuration Protocol server for all VXLAN, but this causes Dynamic Host Configuration Protocol server to allow for effectively
Different VXLAN are distinguished, so as to be the corresponding correct IP address of different VXLAN distribution.
Specifically, Fig. 1 shows the network structure according to one example embodiment of the present invention.Refer to Fig. 1, VM1 and
VM2 is respectively at VXLAN1 and VXLAN2, and is registered as dhcp client (client)；VM1, VM2 etc. are respectively connecting to
The VXLAN tunnel ends node VTEP equipment of dhcp client side, i.e. VTEP-A；The VXLAN tunnel ends of Dynamic Host Configuration Protocol server side
Node VTEP equipment (i.e. VTEP-B) sets up tunnel between VTEP-A, so that the virtual machine such as VM1, VM2 can be by this
Corresponding IP address is asked to Dynamic Host Configuration Protocol server in tunnel.Therefore, one embodiment of the invention proposes a kind of message as shown in Figure 2
Transmission method, this method is applied to the VTEP equipment (VTEP-B in such as Fig. 1) of the Dynamic Host Configuration Protocol server side in VXLAN networkings,
Including：
Step 202, when receiving dhcp client request message from VXLAN tunnels, the dhcp client will be received
The corresponding VXLAN network identifiers VNI in tunnel face of request message is added in the dhcp client request message；
Step 204, the dhcp client request message that with the addition of the VNI is sent to Dynamic Host Configuration Protocol server, so that described
Dynamic Host Configuration Protocol server is according to the address that the VNI is that the dhcp client distributes corresponding address section.
From above-described embodiment, the present invention by the VTEP equipment of Dynamic Host Configuration Protocol server side to from dhcp client
Dhcp client request message pre-processed so that Dynamic Host Configuration Protocol server can understand directly according to VNI information come accurate and
The VXLAN belonging to current dhcp client request message is identified, and is correctly distributed for corresponding dhcp client (i.e. VM)
Corresponding IP address.
Wherein, VNI information can be added in the option structures in dhcp client request message.Specifically, DHCP
Option structures in client request message can use " TLV (Type-length-value, type-length-value) " shape
Formula, such as Fig. 3 show that the value in the option structures of an exemplary embodiment, Code fields therein is used to show current
Value in type of message in option structures, Len fields is used for the length for showing that VNI fields take, and the value in VNI is
The VNI parsed in the dhcp client request message that the VTEP of Dynamic Host Configuration Protocol server side is received；Specifically, shown in Fig. 3
In option structures, it is VNI to show the message in current option structures using Code=30, and assumes that VNI now is specific
For 5.Certainly, it will be understood by those skilled in the art that in addition to the option structures shown in Fig. 3, as long as can uniquely answer
Encapsulation for VNI message, it is clear that the combination of others Code values, Len values etc. can also be used, be will not enumerate herein.
For the dhcp client request message received, Fig. 4 is refer to, the present invention, which is proposed, to be further applied to
The VTEP of Dynamic Host Configuration Protocol server side technical scheme, including：
Step 402, when receiving dhcp client request message, it is transferred to step 404；
Step 404, parse the dhcp client request message that receives, and in the mapping table record dhcp client ID,
Correspondence pass between the tunnel face of reception dhcp client request message and the corresponding VXLAN network identifiers VNI in the tunnel face
System, is used as the mapping item in mapping table；
Specifically, mapping item (can generate and send the dhcp client request message by dhcp client ID
Dhcp client), public network tunnel face and VNI etc. constitute.Such as the VM1 shown in Fig. 1, it is assumed that VTEP-B is come from receiving
During VM1 dhcp client request message, mapping item as shown in table 1 is generated.
| VNI | Client id | Public network tunnel face |
| 5 | 001 | 1 |
| 8 | 003 | 3 |
| … | … | … |
Table 1
Step 406, when receiving DHCP request response message (i.e. the DHCP Offer messages) of Dynamic Host Configuration Protocol server return,
It is transferred to step 408；
Step 408, the information such as the dhcp client ID in the DHCP request response message that parsing is received, to determine phase
The mapping item matched somebody with somebody；
Step 410, according to the mapping item matched, DHCP request response message is packaged and sent.
Specifically, such as the dhcp client ID that VTEP-B is received from Dynamic Host Configuration Protocol server please for 001 dhcp client
Seek response message, you can inquire the mapping item corresponding to VM1 shown in table 1, VTEP-B is 1 according to VNI=5, tunnel face
Corresponding address information (such as source IP and purpose IP), tunnel encapsulation and forwarding are carried out to the DHCP request response message.
Therefore, by the technical scheme shown in Fig. 2 and Fig. 4, it is able to recognize the dhcp client hair under different VXLAN
The dhcp client request message sent, and DHCP request response message is back to corresponding dhcp client, so as to pass through
One Dynamic Host Configuration Protocol server, realizes and the IP address of VM in multiple VXLAN is distributed.
In addition, each corresponding mapping item of dhcp client can be stored in the VTEP equipment of Dynamic Host Configuration Protocol server side (such as
VTEP-B shown in Fig. 1) in, and can be applied to repeatedly to dhcp client request message and DHCP request response message
Transmission.Meanwhile, when receiving the release messages of the DHCP from dhcp client, according to dhcp client ID, delete with being somebody's turn to do
The mapping item that dhcp client ID matches.
Meanwhile, corresponding solution is proposed present invention is alternatively directed to pseudo- Dynamic Host Configuration Protocol server, including：
As an illustrative embodiments, the VLAN ID labels configuration of real Dynamic Host Configuration Protocol server can be existed in advance
In the VTEP equipment of Dynamic Host Configuration Protocol server side, then the VTEP equipment is receiving the request report of the dhcp client from dhcp client
Wen Shi, (can wherein be packaged with and include to dhcp client request message according to local pre-configured above-mentioned VLAN ID labels
VNI option structures) it is packaged；
, can be in advance by the corresponding outgoing interface configuration of real Dynamic Host Configuration Protocol server in DHCP as another exemplary embodiment
In the VTEP equipment of server side, then the VTEP equipment is receiving the dhcp client request message from dhcp client
When, local pre-configured above-mentioned outgoing interface can be obtained, and be directly used in transmission dhcp client request message.
The situation of different segment is in for Dynamic Host Configuration Protocol server and dhcp client, in order to not influence dhcp client to ask
The unicast forwarding of message, present invention further proposes the technology that following VTEP equipment for Dynamic Host Configuration Protocol server side are improved
Scheme, including：
When receiving the DHCP request response message of Dynamic Host Configuration Protocol server return, added in the DHCP request response message
It is to include in the dhcp response message as dhcp client by purpose address, next-hop of the IP address of the Dynamic Host Configuration Protocol server
The routing iinformation of the subnet broadcast address of the network segment where the address of side distribution, so that dhcp client generates this bar route letter
Breath；
Meanwhile, VTEP equipment also generate corresponding to the Dynamic Host Configuration Protocol server ARP generation answer list item, wherein
It is to answer the MAC Address that MAC is the Dynamic Host Configuration Protocol server in the subnet broadcast address, generation that the generation that ARP generations are answered in list item, which answers IP,.
Specifically, such as in the network structure shown in Fig. 1, routing iinformation above-mentioned for generating VTEP-B and ARP generations
Answer list item.Corresponding to VM1, the destination address of the routing iinformation of VTEP-B generations is that the IP address of Dynamic Host Configuration Protocol server, next-hop are
Dynamic Host Configuration Protocol server is the subnet broadcast address of the network segment where the IP address that VM1 is distributed；Corresponding to VM2, the route of VTEP-B generations
The destination address of information is that the IP address of Dynamic Host Configuration Protocol server, next-hop are net where the IP address that Dynamic Host Configuration Protocol server is VM2 distribution
The subnet broadcast address of section.
Based on VM1 or VM2 when sending unicast message to Dynamic Host Configuration Protocol server, it can initiate to be directed to own IP address institute first
In the ARP request of the subnet broadcast address of the network segment, then VTEP-B answers list item according to pre-stored ARP generations, returns to Dynamic Host Configuration Protocol server
MAC Address so that dhcp client according to the MAC Address carry out two layers forwarding dhcp client request message when, you can hair
Deliver to Dynamic Host Configuration Protocol server.
Corresponding to above-mentioned message transmitting method, the invention also provides a kind of message transmitting device, applied to expansible
The VXLAN tunnel ends nodes VTEP of dynamic host configuration protocol DHCP server side in Virtual Local Area Network VXLAN networkings
Equipment, including：
Adding device, for the DHCP visitors when receiving dhcp client request message from VXLAN tunnels, will to be received
The corresponding VXLAN network identifiers VNI in tunnel face of family end request message is added in the DHCP message；
Transmitting element, for the DHCP message that with the addition of the VNI to be sent to Dynamic Host Configuration Protocol server, so that the DHCP takes
Device be engaged according to the address that the VNI is dhcp client distribution corresponding address section.
Optionally, acquiring unit can also be included, be used for：
The VLAN ID labels of local pre-configured Dynamic Host Configuration Protocol server are obtained, the VLAN ID labels are used for encapsulation
State VNI DHCP message be packaged after, sent by the transmitting element to Dynamic Host Configuration Protocol server；
And/or the outgoing interface of local pre-configured Dynamic Host Configuration Protocol server is obtained, and the outgoing interface is passed through by the transmitting element
Send the DHCP message that with the addition of the VNI.
Optionally, it can also include：
Recording unit, for when receiving the dhcp client request message, DHCP client to be recorded in the mapping table
Correspondence between end, the tunnel face for receiving dhcp client request message and the corresponding VXLAN network identifiers VNI in the tunnel face
Relation；
Matching unit, for when receiving the DHCP request response message of Dynamic Host Configuration Protocol server return, by the DHCP request
The dhcp client ID included in response message is matched with the mapping table；
Processing unit, the VNI in dhcp client ID mapping item and the information of tunnel face are matched with for basis
The DHCP request response message is packaged, and sent from the transmitting element to dhcp client.
Optionally, it can also include：
Unit is deleted, for when the DHCP for receiving dhcp client discharges message, according to dhcp client ID, deleting
Except the mapping item matched with dhcp client ID.
Optionally, it can also include：
Generation unit, for when receiving the DHCP request response message of Dynamic Host Configuration Protocol server return, in the DHCP request
Added in response message by purpose address, next-hop of the IP address of the Dynamic Host Configuration Protocol server in being the DHCP request response message
Comprising the address distributed for dhcp client where the network segment subnet broadcast address routing iinformation, and generate correspond to it is described
In the ARP generation of Dynamic Host Configuration Protocol server, answers list item, and the generation that wherein ARP generations are answered in list item answers IP for the subnet broadcast
The MAC Address that MAC is the Dynamic Host Configuration Protocol server is answered in address, generation.
Therefore, the present invention is sealed by parsing the VNI in DHCP message by VTEP, and by the VNI in the form of option
In dhcp client request message so that Dynamic Host Configuration Protocol server can directly recognize current DHCP client according to VNI information
The VXLAN belonging to request message is held, so that it is guaranteed that distributing correct IP address for corresponding dhcp client.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all essences in the present invention
God is with principle, and any modification, equivalent substitution and improvements done etc. should be included within the scope of protection of the invention.
Claims (8)
1. a kind of message transmitting method, it is characterised in that main applied to the dynamic in expansible Virtual Local Area Network VXLAN networkings
The VXLAN tunnel ends node VTEP equipment of machine configuration protocol DHCP server side, including：
When receiving dhcp client request message from VXLAN tunnels, the tunnel of the dhcp client request message will be received
The corresponding VXLAN network identifiers VNI in road junction is added in the dhcp client request message and sent to Dynamic Host Configuration Protocol server,
So that the Dynamic Host Configuration Protocol server is according to the address that the VNI is that the dhcp client distributes corresponding address section；
When receiving the DHCP request response message of Dynamic Host Configuration Protocol server return, added in the DHCP request response message with institute
The IP address for stating Dynamic Host Configuration Protocol server is that purpose address, next-hop are being distributed for dhcp client of including in the dhcp response message
Address where the network segment subnet broadcast address routing iinformation, and generate corresponding to the Dynamic Host Configuration Protocol server address resolution assist
In view ARP generations, answer list item, and the generation that wherein ARP generations are answered in list item answers IP and is the subnet broadcast address, is DHCP clothes for MAC is answered
The MAC Address of business device.
2. according to the method described in claim 1, it is characterised in that the dhcp client request message of the VNI will be with the addition of
Send to Dynamic Host Configuration Protocol server and specifically include：
The VLAN ID labels of local pre-configured Dynamic Host Configuration Protocol server are obtained, by the VLAN ID labels to being packaged with the VNI's
After dhcp client request message is packaged, send to Dynamic Host Configuration Protocol server；
And/or the outgoing interface of local pre-configured Dynamic Host Configuration Protocol server is obtained, and with the addition of the VNI's by outgoing interface transmission
Dhcp client request message.
3. according to the method described in claim 1, it is characterised in that also include：
When receiving the dhcp client request message, dhcp client is recorded in the mapping table, dhcp client is received
Corresponding relation between the tunnel face of request message and the corresponding VXLAN network identifiers VNI in the tunnel face；
When receiving the DHCP request response message of Dynamic Host Configuration Protocol server return, by what is included in the DHCP request response message
Dhcp client ID is matched with the mapping table, according to the VNI that is matched with dhcp client ID mapping item and
The information of tunnel face is packaged to the DHCP request response message and sent to dhcp client.
4. method according to claim 3, it is characterised in that also include：
When the DHCP for receiving dhcp client discharges message, according to dhcp client ID, delete and the dhcp client
The mapping item that ID matches.
5. a kind of message transmitting device, it is characterised in that main applied to the dynamic in expansible Virtual Local Area Network VXLAN networkings
The VXLAN tunnel ends node VTEP equipment of machine configuration protocol DHCP server side, including：
Adding device, for when receiving dhcp client request message from VXLAN tunnels, the dhcp client will to be received
The corresponding VXLAN network identifiers VNI in tunnel face of request message is added in the dhcp client request message；
Transmitting element, for the dhcp client request message that with the addition of the VNI to be sent to Dynamic Host Configuration Protocol server, so that described
Dynamic Host Configuration Protocol server is according to the address that the VNI is that the dhcp client distributes corresponding address section；
Generation unit, for when receiving the DHCP request response message of Dynamic Host Configuration Protocol server return, in DHCP request response
Added in message by purpose address, next-hop of the IP address of the Dynamic Host Configuration Protocol server is to include in the DHCP request response message
For dhcp client distribute address where the network segment subnet broadcast address routing iinformation, and generate correspond to the DHCP
In the ARP generation of server, answers list item, and the generation that wherein ARP generations are answered in list item answers IP for the subnet broadcast
The MAC Address that MAC is the Dynamic Host Configuration Protocol server is answered in location, generation.
6. device according to claim 5, it is characterised in that also including acquiring unit, is used for：
The VLAN ID labels of local pre-configured Dynamic Host Configuration Protocol server are obtained, by the VLAN ID labels to being packaged with the VNI's
After dhcp client request message is packaged, sent by the transmitting element to Dynamic Host Configuration Protocol server；
And/or the outgoing interface of local pre-configured Dynamic Host Configuration Protocol server is obtained, and sent by the transmitting element by the outgoing interface
It with the addition of the dhcp client request message of the VNI.
7. device according to claim 5, it is characterised in that also include：
Recording unit, for when receiving the dhcp client request message, recording dhcp client in the mapping table, connecing
Corresponding relation between the tunnel face of receipts dhcp client request message and the corresponding VXLAN network identifiers VNI in the tunnel face；
Matching unit, for when receiving the DHCP request response message of Dynamic Host Configuration Protocol server return, the DHCP request to be responded
The dhcp client ID included in message is matched with the mapping table；
Processing unit, for according to being matched with VNI in dhcp client ID mapping item and tunnel face information to institute
State DHCP request response message to be packaged, and sent from the transmitting element to dhcp client.
8. device according to claim 7, it is characterised in that also include：
Delete unit, for when the DHCP for receiving dhcp client discharges message, according to dhcp client ID, delete with
The mapping item that dhcp client ID matches.
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| CN103814554A (en) * | 2013-12-11 | 2014-05-21 | 华为技术有限公司 | Communication method, device and system of virtual extensible local area network |
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