CN104363170B - Forwarding data flow method and apparatus in a kind of software defined network - Google Patents

Forwarding data flow method and apparatus in a kind of software defined network Download PDF

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Publication number
CN104363170B
CN104363170B CN201410687065.8A CN201410687065A CN104363170B CN 104363170 B CN104363170 B CN 104363170B CN 201410687065 A CN201410687065 A CN 201410687065A CN 104363170 B CN104363170 B CN 104363170B
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China
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equipment
traffic engineering
source
mpls traffic
engineering tunnels
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CN201410687065.8A
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Chinese (zh)
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CN104363170A (en
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吴文国
王伟
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新华三技术有限公司
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Abstract

The invention provides stream compression forwarding method in a kind of software defined network, this method includes:SDN controllers determine source device and purpose equipment that the data flow forwards in underlay networks, and make to set up the MPLS traffic engineering tunnels for meeting bandwidth requirement between the source device and purpose equipment to there is the data flow of bandwidth requirement;And distributing pressure forwarding mark makes the data flow be sent when being forwarded in underlay networks by the MPLS traffic engineering tunnels.Based on same inventive concept, the application also proposes stream compression transmitting apparatus in a kind of software defined network, and to there is the tenant of bandwidth requirement, flow can obtain Bandwidth guaranteed when being transmitted in underlay networks.

Description

Forwarding data flow method and apparatus in a kind of software defined network

Technical field

The present invention relates to communication technical field, stream compression forwarding method and dress in more particularly to a kind of software defined network Put.

Background technology

Network congestion is to influence the subject matter of backbone network performance.The reason for congestion is probably that Internet resources are not enough, It is probably the unbalanced caused local congestion of network resource loads.

Traffic engineering (Traffic Engineering, TE) can be for congestion problems caused by solution load imbalance. Traffic engineering by monitoring the load of the flow and NE of network, dynamic adjustment traffic management parameters, routing parameter in real time With resource constraint parameter etc., make network operation state transition to perfect condition, optimize the use of Internet resources, it is to avoid load is uneven Congestion caused by weighing apparatus.Multiprotocol label switching (Multiprotocol Label Switching, MPLS) TE combines MPLS skills Art and traffic engineering, by setting up label switched path (Label Switched Path, LSP) tunnel along specified path Resource reservation is carried out, network traffics is got around congested node, reaches the purpose of balance network traffic.

In software defined network (Software Defined Network, SDN) Visualized data centre network, belong to The virtual machine distribution of one tenant as same tenant, that is, may correspond to same VLAN on different server (Virtual eXtensible Local Area Network, VXLAN ID), and it is distributed in the virtual machine on different server , it is necessary to after VXLAN is encapsulated, pass through bottom when needing communication, or virtual machine with outside non-virtualized network service (underlay) network, then reaches purpose equipment again.

Flow is when passing through underlay networks, due to the flow for different tenants, it is impossible to effectively identification, when When there is flow congestion in underlay networks, the flow of some important tenants will be unable to obtain Bandwidth guaranteed.

The content of the invention

In view of this, the application provides forwarding data flow method and apparatus in a kind of software defined network, to solve flow The problem of Bandwidth guaranteed can not being obtained when being transmitted in underlay networks.

In order to solve the above technical problems, what the technical scheme of the application was realized in:

A kind of stream compression forwarding method in software defined network SDN, this method includes:

What SDN controllers received that virtual expansible LAN endpoint of a tunnel VTEP equipment sends issues stream for data flow During the request of forward table, however, it is determined that the VLAN VXLAN marks and the corresponding table of bandwidth requirement of the SDN controllers storage It is middle to there is the corresponding bandwidth requirement of VXLAN marks that the data flow needs to encapsulate, it is determined that in bottom underlay network transfers Send out the source device and purpose equipment of the data flow;

The SDN controllers determine multiprotocol label switching MPLS whether has been set up between the source device and purpose equipment TE tunnel of traffic engineering;

If it is determined that do not set up MPLS traffic engineering tunnels between the source device and purpose equipment, then the SDN controllers are to described Source device and purpose equipment issue the configuration for setting up MPLS traffic engineering tunnels, so as to be set up between the source device and purpose equipment full The MPLS traffic engineering tunnels of the foot bandwidth requirement;

The SDN controllers force forwarding mark for the MPLS traffic engineering tunnels distribution of the foundation;

The SDN controllers issue stream forwarding list to the VTEP equipment, and the stream forwarding list includes the pressure forwarding Mark, carries the pressure forwarding mark when making the VTEP equipment according to the stream forwarding list to the source device transmitting data flow Know;

Forwarding strategy is issued on the interface that the SDN controllers are connected to the source device with the VTEP equipment, it is described Forwarding strategy is used to indicate when by the interface to the data flow for carrying the pressure forwarding mark, by described MPLS traffic engineering tunnels send the data flow.

A kind of stream compression transmitting apparatus in software defined network SDN, the device includes:Receiving unit, determining unit and place Manage unit;

The receiving unit, data flow is directed to for receive that virtual expansible LAN endpoint of a tunnel VTEP equipment sends Issue the request of stream forwarding list;

The determining unit, for when the receiving unit receive VTEP equipment transmission issue circulation for data flow During the request delivered, however, it is determined that the VLAN VXLAN marks of storage are with having the data flow in the corresponding table of bandwidth requirement The VXLAN of encapsulation is needed to identify corresponding bandwidth requirement, it is determined that to forward the data flow in bottom (underlay) network Source device and purpose equipment;Further determine that multiprotocol label switching stream whether has been set up between the source device and purpose equipment Measure engineering MPLS traffic engineering tunnels;

The processing unit, if determining not setting up MPLS between the source device and purpose equipment for the determining unit Traffic engineering tunnel, then issue the configuration for setting up MPLS traffic engineering tunnels to the source device and purpose equipment, so that the source device and purpose The MPLS traffic engineering tunnels for meeting the bandwidth requirement are set up between equipment;And force to turn for the MPLS traffic engineering tunnels distribution of the foundation Issue of bidding documents is known;Stream forwarding list is issued to the VTEP equipment, the stream forwarding list includes the pressure forwarding mark, makes the VTEP Equipment according to the stream forwarding list to the source device transmitting data flow when carry it is described force forwarding mark;To the source device Forwarding strategy is issued on the interface being connected with the VTEP equipment, the forwarding strategy is used to indicate passing through the interface To when carrying the data flow for forcing forwarding to identify, pass through the MPLS traffic engineering tunnels and send the data flow.

As can be seen from the above technical solution, SDN controllers, to there is the data flow of bandwidth requirement, determine the data in the application The source device forwarded in underlay networks and purpose equipment are flowed, and makes to set up satisfaction between the source device and purpose equipment The MPLS traffic engineering tunnels of bandwidth requirement;And distributing pressure forwarding mark makes the data flow logical when being forwarded in underlay networks The MPLS traffic engineering tunnels are crossed to send.To there is the tenant of bandwidth requirement, flow can obtain band when being transmitted in underlay networks Width ensures.

Brief description of the drawings

Fig. 1 is forwarding data flow method flow schematic diagram in SDN in the embodiment of the present application;

Fig. 2 is overlay networking schematic diagrams;

Fig. 3 is forwarding data flow apparatus structure schematic diagram in SDN in the embodiment of the present application.

Embodiment

In order to make the purpose , technical scheme and advantage of the present invention be clearer, below in conjunction with the accompanying drawings and according to embodiment, Technical scheme is described in detail.

Referring to Fig. 1, Fig. 1 is forwarding data flow method flow schematic diagram in SDN in the embodiment of the present application.Concretely comprise the following steps:

Step 101, SDN controllers receive virtual expansible LAN endpoint of a tunnel (VXLAN Tunnel End Point, VTEP) when issuing the request of stream forwarding list for data flow of equipment transmission, however, it is determined that the SDN controllers storage VXLAN is identified with there is the corresponding bandwidth requirement of VXLAN marks that the data flow needs to encapsulate in the corresponding table of bandwidth requirement, then It is determined that forwarding the source device and purpose equipment of the data flow in underlay networks.

When implementing, if some tenant needs the transmitting data stream in underlay networks to obtain Bandwidth guaranteed When, it can configure and store the tenant, be i.e. the corresponding VXLAN of the tenant identifies corresponding bandwidth requirement.

It is that corresponding data stream determines the correlation encapsulation of VXLAN tunnels when SDN controllers receive the request for issuing stream forwarding list During information, also need to determine that correspondence VXLAN identifies whether correspondence bandwidth requirement, if it is, the technical scheme provided by the application, It is determined that forwarding the source device and purpose equipment of the data flow in underlay networks;Otherwise, realized by existing.

SDN controllers determine to forward the source device and purpose equipment of the data flow in underlay networks in this step, Specifically include:

SDN controllers determine to forward the VXLAN tunnels of the data flow according to the source address and destination address of the data flow The source address and destination address in road;It is determined that the corresponding VTEP equipment of the source address is accessed the equipment of underlay networks as The source device;It is determined that the equipment that the corresponding VTEP equipment of the destination address is accessed into underlay networks is used as the purpose Equipment.

SDN controllers determine needs according to the source IP address and purpose IP address of the data flow in overlay networks When the source address and destination address in the VXLAN tunnels of encapsulation, if the purpose IP address of the data flow is in this overlay network VM IP address, and the source IP address and purpose IP address of the data flow is when belonging to same VXLAN, it is determined that VXLAN tunnels The purpose IP address in road is the address for the VTEP equipment being connected with purpose VM;Otherwise, it determines VXLAN tunnels purpose IP address For the address of the VTEP equipment in gateway device.

Step 102, the SDN controllers determine MPLS traffic engineering tunnels whether have been set up between the source device and purpose equipment.

Step 103, however, it is determined that MPLS traffic engineering tunnels are not set up between the source device and purpose equipment, then the SDN controls Device issues the configuration for setting up MPLS traffic engineering tunnels to the source device and purpose equipment so that the source device and purpose equipment it Between set up and meet the MPLS traffic engineering tunnels of the bandwidth requirement.

The MPLS traffic engineering tunnels set up in this step can be two-way MPLS traffic engineering tunnels, and the SDN controllers are to the source Equipment and purpose equipment issue the configuration for setting up MPLS traffic engineering tunnels, are met so as to be set up between the source device and purpose equipment The MPLS traffic engineering tunnels of the bandwidth requirement, including:

The SDN controllers issue to the source device and regard the MPLS LSR ID of the source device as two-way MPLS TE The configuration of the source address in tunnel, and issue to the purpose equipment MPLS LSR ID of the purpose equipment are used as it is described double To the configuration of the destination address of MPLS traffic engineering tunnels;

The path computing that the SDN controllers are sent in the source device and purpose equipment is received as active devices It is that the two-way MPLS traffic engineering tunnels calculate the path for meeting the bandwidth requirement during request, and result of calculation is returned to described Active devices, complete the foundation of the two-way MPLS traffic engineering tunnels.

Step 104, the SDN controllers force forwarding mark for the MPLS traffic engineering tunnels distribution of the foundation.

It is the MPLS traffic engineering tunnels distribution pressure forwarding mark set up in this step, is and the MPLS traffic engineering tunnels of foundation Forwarding mark is forced in the connected VTEP equipment of source device and the VTEP apparatus bounds distribution being connected with purpose equipment.

It is described to force forwarding mark be with globally unique distribution or for the globally unique distribution of an interface, this In interface be the interface of VTEP equipment being connected with access device.

In step 104, SDN controllers are forced for the MPLS traffic engineering tunnels distribution of the foundation after forwarding mark, SDN controls Device processed further records Bandwidth guaranteed list item, and the Bandwidth guaranteed list item includes:VXLAN marks, the source device are connected The address of VTEP equipment, the address of the VTEP equipment of purpose equipment connection and pressure forwarding mark.

Wherein, the VXLAN is designated the VXLAN marks that the data flow determined according to the data flow needs to encapsulate;Institute The address for stating the VTEP equipment of source device connection is to be determined to forward the number according to the source address and destination address of the data flow According to the source address in the VXLAN tunnels of stream;The address of the VTEP equipment of the purpose equipment connection is the source according to the data flow Address and destination address determine the destination address in the VXLAN tunnels of the forwarding data flow.

The Bandwidth guaranteed list item is used to determine whether set up MPLS traffic engineering tunnels between source device and purpose equipment, it is determined that Whether include the VXLAN marks for needing to encapsulate in the corresponding VXLAN marks of MPLS traffic engineering tunnels set up, implement It is as follows:

SDN controllers determine MPLS traffic engineering tunnels whether have been set up between the source device and purpose equipment, including:

SDN controllers determine whether the address of the VTEP equipment of the source device and purpose equipment connection can match correspondence Bandwidth guaranteed list item, if it is, determining to have set up MPLS traffic engineering tunnels between the source device and purpose equipment;Otherwise, it determines MPLS traffic engineering tunnels are not set up between the source device and purpose equipment.

Wherein, the address of the source device and the VTEP equipment of purpose equipment connection, is source according to the data flow The source address and destination address in the VXLAN tunnels for the forwarding data flow that location and destination address are determined.

Step 105, the SDN controllers issue stream forwarding list to the VTEP equipment, and the stream forwarding list includes described Forwarding mark is forced, carries described strong when making the VTEP equipment according to the stream forwarding list to the source device transmitting data flow System forwarding mark.

The stream forwarding list issued in this step to VTEP equipment, which only increases by one, forces forwarding mark, the equal co-occurrence of other guide There is realization.

Data flow carries the concrete form for forcing forwarding to identify, and according to determination is implemented, such as the use priority is real Forwarding mark is now forced, then pressure forwarding mark is carried in precedence field when data flow VXLAN is encapsulated, in access device It is the data stream recovery priority according to message protocol when receiving the data of VXLAN encapsulation;

If being realized using non-existent field contents in message and forcing forwarding mark, the data flow encapsulated in VXLAN In reserved field in or extra increase field carry pressure forwarding mark;The number of VXLAN encapsulation is received in access device According to when, directly by the pressure forwarding mark delete.

Step 106, forwarding plan is issued on the interface that the SDN controllers are connected to the source device with the VTEP equipment Slightly, the forwarding strategy is used to indicate when forcing to forward the data flow of mark to carrying is described by the interface, leads to Cross the MPLS traffic engineering tunnels and send the data flow.

The SDN controllers are also to VTEP corresponding with the destination address in the VXLAN tunnels in the purpose equipment The forwarding strategy is issued on the connected interface of equipment.

The execution sequence of step 105 and step 106 is not limited, and is preferably first carried out step 106 and is performed step 105 again.

When performing step 102, if SDN controllers determine to have set up MPLS TE tunnels between the source device and purpose equipment Whether road, further determining that in the corresponding VXLAN marks of the MPLS traffic engineering tunnels set up includes the VXLAN for needing to encapsulate Mark.

SDN controllers determine whether need encapsulation including described in the corresponding VXLAN marks of the MPLS traffic engineering tunnels set up VXLAN mark, including:

Whether include in VXLAN marks in the Bandwidth guaranteed list item matched described in the SDN controllers determination described Need the VXLAN marks of encapsulation;If in the Bandwidth guaranteed list item matched VXLAN mark include it is described need encapsulate VXLAN marks, it is determined that the corresponding VXLAN marks of the MPLS traffic engineering tunnels set up include the VXLAN that the needs are encapsulated Mark;If not including the VXLAN marks for needing to encapsulate in the VXLAN marks in the Bandwidth guaranteed list item matched, Then determine not including the VXLAN marks for needing to encapsulate in the corresponding VXLAN marks of the MPLS traffic engineering tunnels set up.

When it is determined that not including what the needs were encapsulated in the corresponding VXLAN marks of the MPLS traffic engineering tunnels set up When VXLAN is identified, the SDN controllers recalculate the path of the MPLS traffic engineering tunnels, described MPLS TE recalculated Bandwidth requirement and the needs of the bandwidth in the path in tunnel not less than the data flow of the MPLS traffic engineering tunnels forwarding set up The VXLAN of encapsulation identifies the sum of corresponding bandwidth requirement;And result of calculation is sent to the MPLS traffic engineering tunnels pair set up The source device and purpose equipment answered, make the corresponding source device of MPLS traffic engineering tunnels set up and purpose equipment complete again The foundation of the MPLS traffic engineering tunnels;

The SDN controllers issue strong including the MPLS traffic engineering tunnels distribution set up to be described to the VTEP equipment The stream forwarding list of system forwarding mark.

SDN controllers also carry out the record of Bandwidth guaranteed list item when issuing stream forwarding list to the VTEP, can be by institute Stating needs the VXLAN encapsulated marks to be added in corresponding Bandwidth guaranteed list item, and a Bandwidth guaranteed can also be preserved again List item.

When it is determined that including the VXLAN for needing to encapsulate in the corresponding VXLAN marks of the MPLS traffic engineering tunnels set up During mark, the SDN controllers issue the pressure including being distributed for the MPLS traffic engineering tunnels set up to the VTEP equipment Forward the stream forwarding list of mark.

In the embodiment of the present application, when it is determined that not including institute in the corresponding VXLAN marks of the MPLS traffic engineering tunnels set up When stating the VXLAN marks for needing to encapsulate, it is not necessary to re-establish MPLS traffic engineering tunnels, but recalculate the MPLS traffic engineering tunnels Path, the bandwidth in the path of the MPLS traffic engineering tunnels recalculated meets what the MPLS traffic engineering tunnels set up were forwarded The bandwidth requirement of data flow with it is described need encapsulate it is the corresponding bandwidth requirement of VXLAN marks and.Triggering the operation can To be realized by tunnel CRLSP trustships attribute.It is implemented as follows:

The SDN controllers to the source device and purpose equipment issue the configuration for setting up MPLS traffic engineering tunnels when, with present Send out tunnel CRLSP trustship attributes.

The trustship MPLS that active devices of the SDN controllers in the source device and purpose equipment is received are sent During the corresponding CRLSP of traffic engineering tunnel notice, determine that the MPLS traffic engineering tunnels are set up and complete, and record MPLS traffic engineering tunnels correspondence CRLSP it is in trust, with it is determined that not including in the MPLS traffic engineering tunnels set up corresponding VXLAN marks described needs envelope During the VXLAN marks of dress, the path in the MPLS tunnels is recalculated in triggering.

The SDN controllers can also be opened when issuing tunnel CRLSP trustship attributes for the MPLS traffic engineering tunnels CRLSP trustship attribute timers;In timer expiry, if not receiving the trustship MPLS TE tunnels of active devices transmission also During the corresponding CRLSP in road notice, it is believed that the tunnel between source device and purpose equipment has not been able to set up and completed, SDN controllers It is embodied as the VTEP equipment as existing and is issued forwarding flow table.

Referring to Fig. 2, Fig. 2 is overlay networking schematic diagrams.VM1 and VM4 belong to same group of family, correspondence VXLAN in Fig. 2 It is designated 1, VM2 and VM3 and belongs to same tenant, correspondence VXLAN is designated 2, VM1 IP address for IP1-1, VM4 IP Location is IP2-4, and the IP address of VTEP equipment 1 is IP1, and the IP address of VTEP equipment 2 is IP2, the interface A of device A IP address For IPA, equipment B interface B IP address is IPB.Present VM1 and VM4, and the cross-domain underlay networks of VM2 and VM3 are carried out Communication.The correspondence bandwidth requirement of VXLAN marks 1 is 10M, and the correspondence bandwidth requirement of VXLAN marks 2 is 20M.

Data flow is first sent to VM4 with VM1 below, exemplified by VM2 sends data flow to VM3 again, idiographic flow is as follows:

The first step, VM1 sends the data flow that purpose IP address is IP2-4 to VTEP1, that is, needs to send to VM4 data Stream.

Second step, when VTEP1 receives the data flow of VM1 transmissions, is locally being checked according to the tuple information of the data flow The stream forwarding list answered, if found, forwards according to the stream forwarding list found, terminates this flow;If do not found, to SDN controllers send the request that stream forwarding list is issued for the data flow.

VTEP1 will can be sent when issuing the request of stream forwarding list to the transmission of SDN controllers in data flow packing, Can only on give the tuple information of the data flow.

3rd step, SDN controllers receive the request that stream forwarding list is issued for the data flow of the transmission of VTEP equipment 1 When, if determining that VXLAN marks need the VXLAN for the data stream with existing in the corresponding table of bandwidth requirement according to the request Identify 1 corresponding bandwidth requirement, it is determined that the source device (device A) and mesh of the data flow are forwarded in bottom underlay networks Equipment (equipment B).

SDN controllers are defined as the data stream according to the source IP address IP1-1 and purpose IP address IP2-4 of data flow VXLAN marks 1, then determine in VXLAN identifies corresponding table with bandwidth requirement 1 corresponding bandwidth requirement 10M of VXLAN marks.

SDN controllers determine that VXLAN identifies 1 corresponding VXLAN tunnels, and determine that the source address in the VXLAN tunnels is VTEP1 address ip 1 and destination address is VTEP2 address ip 2, then determines VTEP1 default routes according to network topology Next-hop (the equipment B interface B IP address of next-hop (the interface A of device A IP address (IPA)) and VTEP2 default routes (IPB))。

Device A belonging to interface A is defined as source device by SDN controllers, and the equipment B belonging to interface B is set for the purpose of determining It is standby.

4th step, SDN controllers determine the MPLS LSR ID of device A as setting up two-way between device A and equipment B The source IP address of MPLS traffic engineering tunnels, equipment B MPLS LSR ID between device A and equipment B as setting up two-way MPLS TE The purpose IP address in tunnel.

5th step, SDN controllers will set up the source IP address and purpose IP address of two-way MPLS traffic engineering tunnels, and bandwidth It is required that being handed down to the source device and purpose equipment with CRLSP trustship attributes, and start for the two-way MPLS traffic engineering tunnels CRLSP trustship attribute timers.

Active devices in 6th step, device A and equipment B (active devices are determined by SDN controllers, it is assumed that be device A) Sent to SDN equipment and calculate the path computing request for meeting bandwidth requirement 10M.When implementing, it can be sent out by PCEP agreements Send request.

7th step, when SDN controllers receive the request, is calculated by local topological database and meets bandwidth requirement Path, if calculating successfully, to device A return path checkout result, performs the 8th step;If calculating is unsuccessful, returned to device A The response in the path for meeting the bandwidth requirement can not be calculated by returning, and be embodied as VTEP1 as existing and issued stream forwarding list, terminate this Flow.

In order to save content, do not set up and complete the relevant configuration informations of two-way MPLS traffic engineering tunnels and can delete.

8th step, device A receives the path computation result of SDN controllers return, completes building for two-way mpls-te tunnel It is vertical, and notify the corresponding CRLSP of the SDN controllers trustship two-way MPLS traffic engineering tunnels.

9th step, SDN controllers receive the trustship two-way MPLS traffic engineering tunnels of device A transmission before timer expiry During corresponding CRLSP notice, know that two-way MPLS traffic engineering tunnels have been successfully established, and it is corresponding to record the MPLS traffic engineering tunnels CRLSP is in trust, performs the tenth step;If in the CRLSP trustship attribute timer expiries of startup, device A hair is not received The corresponding CRLSP of the trustship sent two-way MPLS traffic engineering tunnels notice, then issue circulation hair by existing realize to VTEP equipment 1 Table, terminates this flow.

Tenth step, SDN controllers force forwarding mark for the two-way MPLS traffic engineering tunnels distribution set up, and set up bandwidth guarantor Demonstrate,prove list item.The Bandwidth guaranteed list item includes:VXLAN mark 1, the IP address IP2 of IP address IP1, VTEP2 of VTEP equipment 1 and It is described to force forwarding mark.

11st step, the interface B of interface A from SDN controllers to device A and equipment B issues forwarding strategy, and is set to VTEP Standby 1 issues the stream forwarding list for including identifying for the pressure forwarding of the MPLS traffic engineering tunnels distribution set up.

The stream compression is issued device A, the number by the 12nd step, VTEP equipment 1 according to the stream forwarding list received The pressure forwarding mark is carried according to stream.

13rd step, when device A receives the data flow by interface A, institute will be carried according to the forwarding strategy of configuration The data flow for stating forwarding mark is transmitted by corresponding two-way MPLS traffic engineering tunnels, is sent out by the two-way MPLS traffic engineering tunnels Give after equipment B, relay to VM4 process compared with realization, be not described in detail.

14th step, VM2 sends the data flow that purpose IP address is IP2-3 to VTEP1, that is, needs to send to VM3 number According to stream.

15th step, VTEP equipment 1 receives the data flow of VM2 transmissions, and when not finding corresponding stream forwarding list, to SDN controllers send the request that stream forwarding list is issued for the data flow.

16th step, when SDN controllers receive the request of the transmission of VTEP equipment 1, it is determined that needing the VXLAN marks encapsulated During 2 corresponding bandwidth requirement 20M, (set using the IP address 1 for the VTEP equipment 1 being connected with source device (device A) and with purpose equipment Standby B) IP address 2 of connected VTEP equipment 2 matches corresponding list item in Bandwidth guaranteed list item, the band recorded by the tenth step Width ensures that list item is visible;It is determined that do not include VXLAN marks 2 in corresponding VXLAN marks in the Bandwidth guaranteed list item matched, and Record the corresponding CRLSP of the two-way MPLS traffic engineering tunnels in trust, then re-start road for the two-way MPLS traffic engineering tunnels Footpath calculates (bandwidth in the path recalculated is not less than 30M), and path computation result is returned into device A and equipment B again Set up the two-way MPLS traffic engineering tunnels.

VXLAN marks 2 are added in the Bandwidth guaranteed list item matched by the 17th step, SDN controllers, and are set to VTEP Standby issue includes the stream forwarding list of the pressure forwarding mark for the MPLS traffic engineering tunnels distribution set up.

Follow-up forwarding process synchronization the 12nd is similar with 13 steps, is not described in detail.

Based on same inventive concept, the application also proposes stream compression transmitting apparatus in a kind of software defined network.Referring to Fig. 3, Fig. 3 are forwarding data flow apparatus structure schematic diagram in SDN in the embodiment of the present application.The device includes:Receiving unit 301, Determining unit 302 and processing unit 303.

Receiving unit 301, the request that stream forwarding list is issued for data flow for receiving the transmission of VTEP equipment;

Determining unit 302, for when receiving unit 301 receive VTEP equipment transmission for data flow issue circulation send out During the request of table, however, it is determined that the VLAN VXLAN marks of storage are needed with there is the data flow in the corresponding table of bandwidth requirement The VXLAN to be encapsulated identifies corresponding bandwidth requirement, it is determined that the source of the data flow is forwarded in bottom (underlay) network Equipment and purpose equipment;Further determine that multiprotocol label switching flow whether has been set up between the source device and purpose equipment Engineering MPLS traffic engineering tunnels;

Processing unit 303, for if it is determined that unit 302 determines not setting up MPLS between the source device and purpose equipment Traffic engineering tunnel, then issue the configuration for setting up MPLS traffic engineering tunnels to the source device and purpose equipment, so that the source device and purpose The MPLS traffic engineering tunnels for meeting the bandwidth requirement are set up between equipment;And force to turn for the MPLS traffic engineering tunnels distribution of the foundation Issue of bidding documents is known;Stream forwarding list is issued to the VTEP equipment, the stream forwarding list includes the pressure forwarding mark, makes the VTEP Equipment according to the stream forwarding list to the source device transmitting data flow when carry it is described force forwarding mark;To the source device Forwarding strategy is issued on the interface being connected with the VTEP equipment, the forwarding strategy is used to indicate passing through the interface To when carrying the data flow for forcing forwarding to identify, pass through the MPLS traffic engineering tunnels and send the data flow.

It is preferred that

Determining unit 302, specifically for determining to forward the source device and purpose of the data flow to set in underlay networks When standby, according to the source address of the data flow and destination address determine to forward the source address in the VXLAN tunnels of the data flow and Destination address;It is determined that the equipment that the corresponding VTEP equipment of the source address is accessed into underlay networks is used as the source device; It is determined that the equipment that the corresponding VTEP equipment of the destination address is accessed into underlay networks is used as the purpose equipment;

Receiving unit 301, is further used for RX path computation requests;

Processing unit 303, the configuration of MPLS traffic engineering tunnels is set up specifically for being issued to the source device and purpose equipment, During so that foundation meeting the MPLS traffic engineering tunnels of the bandwidth requirement between the source device and purpose equipment, to the source device Issue using the MPLS LSR ID of the source device as the source address of the two-way MPLS traffic engineering tunnels configuration, and to the mesh Equipment issue using the MPLS LSR ID of the purpose equipment as the destination address of the two-way MPLS traffic engineering tunnels configuration; When receiving unit 301 receives the path computing request sent in the source device and purpose equipment as active devices, it is The two-way MPLS traffic engineering tunnels calculate the path for meeting the bandwidth requirement, and result of calculation is returned into the active devices, So that the source device and purpose equipment complete the foundation of the two-way MPLS traffic engineering tunnels.

It is preferred that

Processing unit 303, is further used for corresponding with the destination address in the VXLAN tunnels in the purpose equipment The connected interface of VTEP equipment on issue the forwarding strategy.

It is preferred that

Determining unit 302, is further used for if it is determined that having set up MPLS TE tunnels between the source device and purpose equipment Road, it is determined that whether including the VXLAN marks for needing to encapsulate in the corresponding VXLAN marks of the MPLS traffic engineering tunnels set up;

Processing unit 303, is further used for when determining unit 302 determines that the MPLS traffic engineering tunnels set up are corresponding When not including the VXLAN marks that the needs are encapsulated in VXLAN marks, the SDN controllers recalculate the MPLS traffic engineering tunnels Path, the bandwidth in the path of the MPLS traffic engineering tunnels recalculated turns not less than the MPLS traffic engineering tunnels set up The bandwidth requirement of the data flow of hair with it is described need encapsulate it is the corresponding bandwidth requirement of VXLAN marks and;And by result of calculation The corresponding source device of MPLS traffic engineering tunnels set up and purpose equipment are sent to, makes the MPLS traffic engineering tunnels set up Corresponding source device and purpose equipment complete the foundation of the MPLS traffic engineering tunnels again;Issued to the VTEP equipment including for institute State the stream forwarding list of the pressure forwarding mark for the MPLS traffic engineering tunnels distribution set up.

It is preferred that

Processing unit 303, is further used for when determining unit 302 determines that the MPLS traffic engineering tunnels set up are corresponding When being identified in VXLAN marks comprising the VXLAN for needing to encapsulate, issue and set up including described to the VTEP equipment The stream forwarding list of the pressure forwarding mark of MPLS traffic engineering tunnels distribution.

It is preferred that

Processing unit 303, when being further used for forcing forwarding mark for the MPLS traffic engineering tunnels distribution of the foundation, record Bandwidth guaranteed list item, the Bandwidth guaranteed list item includes:VXLAN marks, the address of the VTEP equipment of source device connection, institute State the address of the VTEP equipment of purpose equipment connection and force forwarding mark;

Determining unit 302, specifically for determining whether set up MPLS traffic engineering tunnels between the source device and purpose equipment When, whether determine the address of the VTEP equipment of the source device and purpose equipment connection can match corresponding Bandwidth guaranteed table , if it is, determining to have set up MPLS traffic engineering tunnels between the source device and purpose equipment;Otherwise, it determines the source device and MPLS traffic engineering tunnels are not set up between purpose equipment;It is determined that whether being wrapped in the corresponding VXLAN marks of the MPLS traffic engineering tunnels set up When including the VXLAN marks that the needs are encapsulated, it is determined that whether the VXLAN in the Bandwidth guaranteed list item matched wraps in identifying Include the VXLAN marks for needing to encapsulate;If the VXLAN marks in the Bandwidth guaranteed list item matched include the need The VXLAN to be encapsulated marks, it is determined that the corresponding VXLAN marks of the MPLS traffic engineering tunnels set up include described needing to encapsulate VXLAN mark;If not including what the needs were encapsulated in the VXLAN marks in the Bandwidth guaranteed list item matched VXLAN is identified, it is determined that do not include the VXLAN for needing to encapsulate in the corresponding VXLAN marks of MPLS traffic engineering tunnels set up Mark.

The unit of above-described embodiment can be integrated in one, and can also be deployed separately;A unit is can be merged into, also may be used To be further split into multiple subelements.

In summary, SDN controllers, to there is the data flow of bandwidth requirement, determine the data flow in underlay in the application The source device and purpose equipment forwarded in network, and foundation between the source device and purpose equipment is met bandwidth requirement MPLS traffic engineering tunnels;And distribute when pressure forwarding mark makes the data flow be forwarded in underlay networks by the MPLS Traffic engineering tunnel is sent.To there is the tenant of bandwidth requirement, flow can obtain Bandwidth guaranteed when being transmitted in underlay networks.

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 (12)

1. stream compression forwarding method in a kind of software defined network SDN, it is characterised in that this method includes:
What SDN controllers received that virtual expansible LAN endpoint of a tunnel VTEP equipment sends issue circulation for data flow sends out During the request of table, however, it is determined that the virtual expansible LAN VXLAN marks of the SDN controllers storage are corresponding with bandwidth requirement There is the data flow in table needs the VXLAN encapsulated to identify corresponding bandwidth requirement, it is determined that in bottom underlay networks Forward the source device and purpose equipment of the data flow;
The SDN controllers determine multiprotocol label switching MPLS flows whether have been set up between the source device and purpose equipment Engineering traffic engineering tunnel;
If it is determined that not setting up MPLS traffic engineering tunnels between the source device and purpose equipment, then the SDN controllers are set to the source Standby and purpose equipment issues the configuration for setting up MPLS traffic engineering tunnels, and institute is met so as to be set up between the source device and purpose equipment State the MPLS traffic engineering tunnels of bandwidth requirement;
The SDN controllers force forwarding mark for the MPLS traffic engineering tunnels distribution of the foundation;
The SDN controllers issue stream forwarding list to the VTEP equipment, and the stream forwarding list includes the pressure forwarding mark, The pressure forwarding mark is carried when the VTEP equipment is forwarded the data flow to the source device according to the stream forwarding list;
Forwarding strategy, the forwarding are issued on the interface that the SDN controllers are connected to the source device with the VTEP equipment Strategy is used for instruction when forcing to forward the data flow of mark to carrying is described by the interface, passes through the MPLS Traffic engineering tunnel sends the data flow.
2. according to the method described in claim 1, it is characterised in that the determination forwards the data flow in underlay networks Source device and purpose equipment, including:
The SDN controllers determine to forward the VXLAN tunnels of the data flow according to the source address and destination address of the data flow The source address and destination address in road;It is determined that the corresponding VTEP equipment of the source address is accessed the equipment of underlay networks as The source device;It is determined that the equipment that the corresponding VTEP equipment of the destination address is accessed into underlay networks is used as the purpose Equipment;
The SDN controllers issue the configuration for setting up MPLS traffic engineering tunnels to the source device and purpose equipment, so that the source is set The standby foundation between purpose equipment meets the MPLS traffic engineering tunnels of the bandwidth requirement, including:
The SDN controllers issued to the source device MPLS label switching path LSR of the source device is identified ID as The configuration of the source address of two-way MPLS traffic engineering tunnels, and issued to the purpose equipment by the MPLS LSR ID of the purpose equipment It is used as the configuration of the destination address of the two-way MPLS traffic engineering tunnels;
The path computing request that the SDN controllers are sent in the source device and purpose equipment is received as active devices When, it is that the two-way MPLS traffic engineering tunnels calculate the path for meeting the bandwidth requirement, and result of calculation is returned into the active Equipment, so that the source device and purpose equipment complete the foundation of the two-way MPLS traffic engineering tunnels.
3. method according to claim 2, it is characterised in that methods described further comprises:
The SDN controllers are to VTEP equipment phase corresponding with the destination address in the VXLAN tunnels in the purpose equipment The forwarding strategy is issued on interface even.
4. the method according to claim 1-3 any one, it is characterised in that methods described further comprises:
If the SDN controllers determine to have set up MPLS traffic engineering tunnels between the source device and purpose equipment, it is determined that set up Whether the VXLAN mark that needs encapsulate is included in the corresponding VXLAN marks of MPLS traffic engineering tunnels;
When it is determined that not including the VXLAN marks for needing to encapsulate in the corresponding VXLAN marks of the MPLS traffic engineering tunnels set up During knowledge, the SDN controllers recalculate the path of the MPLS traffic engineering tunnels, the road of the MPLS traffic engineering tunnels recalculated The bandwidth in footpath is encapsulated not less than the bandwidth requirement of the data flow of the MPLS traffic engineering tunnels forwarding set up with the needs VXLAN identifies the sum of corresponding bandwidth requirement;And result of calculation is sent to the corresponding source of MPLS traffic engineering tunnels set up Equipment and purpose equipment, make the corresponding source device of MPLS traffic engineering tunnels set up and purpose equipment complete the MPLS again The foundation of traffic engineering tunnel;
The SDN controllers are issued to the VTEP equipment to be turned including the pressure for the MPLS traffic engineering tunnels distribution set up The stream forwarding list that issue of bidding documents is known.
5. method according to claim 4, it is characterised in that methods described further comprises:
When it is determined that including the VXLAN marks for needing to encapsulate in the corresponding VXLAN marks of the MPLS traffic engineering tunnels set up When, the SDN controllers are that the VTEP equipment is issued including the pressure forwarding for the MPLS traffic engineering tunnels distribution set up Identify stream forwarding list.
6. method according to claim 5, it is characterised in that the SDN controllers are the MPLS traffic engineering tunnels of the foundation Distribution is forced after forwarding mark, and methods described further comprises:Record Bandwidth guaranteed list item, the Bandwidth guaranteed list item bag Include:VXLAN marks, the address of the VTEP equipment of source device connection, the address of the VTEP equipment of purpose equipment connection Identified with forcing to forward;
The SDN controllers determine MPLS traffic engineering tunnels whether have been set up between the source device and purpose equipment, including:
Whether determine the address of the VTEP equipment of the source device and purpose equipment connection can match corresponding Bandwidth guaranteed table , if it is, determining to have set up MPLS traffic engineering tunnels between the source device and purpose equipment;Otherwise, it determines the source device and MPLS traffic engineering tunnels are not set up between purpose equipment;
Whether include the VXLAN for needing encapsulation in the corresponding VXLAN marks of MPLS traffic engineering tunnels that the determination has been set up to mark Know, including:
Whether include the needs in VXLAN marks in the Bandwidth guaranteed list item matched described in the SDN controllers determination The VXLAN marks of encapsulation;If the VXLAN marks in the Bandwidth guaranteed list item matched include the needs encapsulation VXLAN is identified, it is determined that the corresponding VXLAN marks of MPLS traffic engineering tunnels set up include the VXLAN marks of the needs encapsulation Know;If not including the VXLAN marks for needing to encapsulate in the VXLAN marks in the Bandwidth guaranteed list item matched, It is determined that not including the VXLAN marks for needing to encapsulate in the corresponding VXLAN marks of the MPLS traffic engineering tunnels set up.
7. stream compression transmitting apparatus in a kind of software defined network SDN, it is characterised in that the device includes:Receiving unit, determination Unit and processing unit;
The receiving unit, for receiving being issued for data flow for virtual expansible LAN endpoint of a tunnel VTEP equipment transmission The request of stream forwarding list;
The determining unit, for when the receiving unit receive VTEP equipment transmission issue stream forwarding list for data flow Request when, however, it is determined that the VLAN VXLAN marks of storage need with there is the data flow in the corresponding table of bandwidth requirement The VXLAN of encapsulation identifies corresponding bandwidth requirement, it is determined that the source device of the data flow is forwarded in bottom underlay networks And purpose equipment;Further determine that and whether set up multi-protocol label switching traffic engineering between the source device and purpose equipment MPLS traffic engineering tunnels;
The processing unit, if determining not setting up MPLS TE between the source device and purpose equipment for the determining unit Tunnel, then issue the configuration for setting up MPLS traffic engineering tunnels to the source device and purpose equipment, so that the source device and purpose are set The MPLS traffic engineering tunnels for meeting the bandwidth requirement are set up between standby;And force forwarding for the MPLS traffic engineering tunnels distribution of the foundation Mark;Stream forwarding list is issued to the VTEP equipment, the stream forwarding list includes the pressure forwarding mark, sets the VTEP The pressure forwarding mark is carried during for according to the stream forwarding list to the source device transmitting data flow;To the source device with Forwarding strategy is issued on the connected interface of the VTEP equipment, the forwarding strategy is used to indicate to arrive by the interface When carrying the data flow for forcing forwarding to identify, pass through the MPLS traffic engineering tunnels and send the data flow.
8. device according to claim 7, it is characterised in that
The determining unit, source device and purpose equipment specifically for determining to forward the data flow in underlay networks When, determined to forward the source address and mesh in the VXLAN tunnels of the data flow according to the source address of the data flow and destination address Address;It is determined that the equipment that the corresponding VTEP equipment of the source address is accessed into underlay networks is used as the source device;Really The fixed equipment that the corresponding VTEP equipment of the destination address is accessed into underlay networks is used as the purpose equipment;
The receiving unit, is further used for RX path computation requests;
The processing unit, the configuration of MPLS traffic engineering tunnels is set up specifically for being issued to the source device and purpose equipment, so that When foundation meets the MPLS traffic engineering tunnels of the bandwidth requirement between the source device and purpose equipment, issued to the source device The MPLS label switching path LSR of the source device is identified to ID as the configuration of the source address of two-way MPLS traffic engineering tunnels, and to The purpose equipment issue using the MPLS LSR ID of the purpose equipment as the two-way MPLS traffic engineering tunnels destination address Configuration;When the receiving unit receives the path computing that is sent in the source device and purpose equipment as active devices please It is that the two-way MPLS traffic engineering tunnels calculate the path for meeting the bandwidth requirement, and result of calculation is returned into the master when asking Dynamic equipment, so that the source device and purpose equipment complete the foundation of the two-way MPLS traffic engineering tunnels.
9. device according to claim 8, it is characterised in that
The processing unit, is further used for corresponding with the destination address in the VXLAN tunnels in the purpose equipment The forwarding strategy is issued on the connected interface of VTEP equipment.
10. the device according to claim 7-9 any one, it is characterised in that
The determining unit, is further used for if it is determined that having set up MPLS traffic engineering tunnels between the source device and purpose equipment, really Whether include the VXLAN marks for needing to encapsulate in the corresponding VXLAN marks of fixed MPLS traffic engineering tunnels set up;
The processing unit, the MPLS traffic engineering tunnels for being further used for having set up described in determining when the determining unit are corresponding When not including the VXLAN marks that the needs are encapsulated in VXLAN marks, the SDN controllers recalculate the MPLS traffic engineering tunnels Path, the bandwidth in the path of the MPLS traffic engineering tunnels recalculated turns not less than the MPLS traffic engineering tunnels set up The bandwidth requirement of the data flow of hair with it is described need encapsulate it is the corresponding bandwidth requirement of VXLAN marks and;And by result of calculation The corresponding source device of MPLS traffic engineering tunnels set up and purpose equipment are sent to, makes the MPLS traffic engineering tunnels set up Corresponding source device and purpose equipment complete the foundation of the MPLS traffic engineering tunnels again;Issued to the VTEP equipment including for institute State the stream forwarding list of the pressure forwarding mark for the MPLS traffic engineering tunnels distribution set up.
11. device according to claim 10, it is characterised in that
The processing unit, the MPLS traffic engineering tunnels for being further used for having set up described in determining when the determining unit are corresponding When being identified in VXLAN marks comprising the VXLAN for needing to encapsulate, issue and set up including described to the VTEP equipment The stream forwarding list of the pressure forwarding mark of MPLS traffic engineering tunnels distribution.
12. device according to claim 11, it is characterised in that
The processing unit, the MPLS traffic engineering tunnels distribution being further used for as the foundation is forced after forwarding mark, record paper Width ensures list item, and the Bandwidth guaranteed list item includes:The address, described of VXLAN marks, the VTEP equipment of source device connection The address of the VTEP equipment of purpose equipment connection and pressure forwarding mark;
The determining unit, during specifically for determining whether to have set up MPLS traffic engineering tunnels between the source device and purpose equipment, Whether can match corresponding Bandwidth guaranteed list item, such as if determining the address of the VTEP equipment of the source device and purpose equipment connection Fruit is to determine to have set up MPLS traffic engineering tunnels between the source device and purpose equipment;Otherwise, it determines the source device and purpose MPLS traffic engineering tunnels are not set up between equipment;It is determined that whether including institute in the corresponding VXLAN marks of the MPLS traffic engineering tunnels set up When stating the VXLAN marks for needing to encapsulate, it is determined that whether the VXLAN in the Bandwidth guaranteed list item matched includes institute in identifying State the VXLAN marks for needing to encapsulate;If in the Bandwidth guaranteed list item matched VXLAN mark include it is described need seal The VXLAN marks of dress, it is determined that the corresponding VXLAN marks of MPLS traffic engineering tunnels set up include the needs encapsulation VXLAN is identified;If not including the VXLAN for needing to encapsulate in the VXLAN marks in the Bandwidth guaranteed list item matched Mark, it is determined that do not include the VXLAN marks for needing to encapsulate in the corresponding VXLAN marks of MPLS traffic engineering tunnels set up.
CN201410687065.8A 2014-11-25 2014-11-25 Forwarding data flow method and apparatus in a kind of software defined network CN104363170B (en)

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