CN104363170A - Data flow forwarding method and device in software defined network (SDN) - Google Patents
Data flow forwarding method and device in software defined network (SDN) Download PDFInfo
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- CN104363170A CN104363170A CN201410687065.8A CN201410687065A CN104363170A CN 104363170 A CN104363170 A CN 104363170A CN 201410687065 A CN201410687065 A CN 201410687065A CN 104363170 A CN104363170 A CN 104363170A
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Abstract
The invention provides a data flow forwarding method in a software defined network (SDN). The data flow forwarding method in the SDN comprises the steps that for a data flow having the requirement for bandwidth, an SDN controller determines a source device and a target device which are used for forwarding the data flow in an underlay network and enables an MPLS TE tunnel meeting the requirement for the bandwidth to be built between the source device and the target device; forced forwarding marks are distributed so that the data flow can be sent through the MPLS TE tunnel when forwarded in the underlay network. Based on the data flow forwarding method in the SDN, the invention further provides a data flow forwarding device in the SDN. Through the data flow forwarding device in the SDN, for tenants having the requirement for the bandwidth, the bandwidth can be guaranteed when the flow is transmitted in the underlay network.
Description
Technical field
The present invention relates to communication technical field, particularly forwarding data flow method and apparatus in a kind of software defined network.
Background technology
Network congestion is the subject matter affecting backbone network performance.Congested reason may be that Internet resources are not enough, also may be the unbalanced local congestion caused of network resource loads.
Traffic engineering (Traffic Engineering, TE) can by the congestion problems solving load imbalance and cause.The flow of traffic engineering by real-time monitor network and the load of network element, dynamic conditioning traffic management parameters, routing parameter and resource constraint parameter etc., make network operation state transition to perfect condition, the use of Optimizing Network Resources, that avoids load imbalance to cause is congested.Multiprotocol label switching (Multiprotocol Label Switching, MPLS) TE combines MPLS technology and traffic engineering, by setting up label switched path (the Label Switched Path along specified path, LSP) tunnel carries out resource reservation, make network traffics get around congested node, reach the object of balance network traffic.
At software defined network (Software Defined Network, SDN) in Visualized data centre network, the virtual machine distribution belonging to a tenant may on different server, as same tenant, i.e. corresponding same VLAN (Virtual eXtensible Local Area Network, VXLAN ID), and the virtual machine be distributed on different server needs communication, or when virtual machine and outside non-virtualized network service, need after VXLAN encapsulation, pass through bottom (underlay) network, and then arrive object equipment.
Flow, when passing through underlay network, due to the flow for different tenant, cannot effectively identify, when there is flow congestion in underlay network, the flow of some important tenant cannot obtain Bandwidth guaranteed.
Summary 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 the problem that cannot obtain Bandwidth guaranteed when flow transmits in underlay network.
For solving the problems of the technologies described above, the technical scheme of the application is achieved in that
Stream compression forwarding method in a kind of software defined network SDN, the method comprises:
SDN controller receive virtual easily extensible local area network (LAN) endpoint of a tunnel VTEP equipment send issue the request of stream forwarding list for data flow time, the VLAN VXLAN that described SDN controller stores if determine identifies and identifies corresponding bandwidth requirement with the VXLAN that there is this data flow in the corresponding table of bandwidth requirement and need to encapsulate, then determine at the source device of this data flow of bottom underlay network repeating and object equipment;
Whether built vertical multiprotocol label switching MPLS TE tunnel of traffic engineering to be determined between described source device and object equipment by described SDN controller;
MPLS traffic engineering tunnel is not set up between described source device and object equipment if determine, then described SDN controller issues the configuration of setting up MPLS traffic engineering tunnel to described source device and object equipment, to make to set up the MPLS traffic engineering tunnel meeting described bandwidth requirement between described source device and object equipment;
Described SDN controller is that the MPLS traffic engineering tunnel of described foundation distributes pressure forwarding mark;
Described SDN controller issues stream forwarding list to described VTEP equipment, and described stream forwarding list comprises described pressure and forwards mark, makes described VTEP equipment forward mark according to described stream forwarding list to carrying described pressure during described source device transmitting data flow;
The interface that described SDN controller is connected with described VTEP equipment to described source device issues forwarding strategy, described forwarding strategy be used to indicate by described interface to carry described force forward mark data flow time, send described data flow by described MPLS traffic engineering tunnel.
Stream compression transmitting apparatus in a kind of software defined network SDN, this device comprises: receiving element, determining unit and processing unit;
Described receiving element, for receiving the request issuing stream forwarding list for data flow that virtual easily extensible local area network (LAN) endpoint of a tunnel VTEP equipment sends;
Described determining unit, for receive when described receiving element VTEP equipment send issue the request of stream forwarding list for data flow time, the VLAN VXLAN stored if determine identifies and identifies corresponding bandwidth requirement with the VXLAN that there is this data flow in the corresponding table of bandwidth requirement and need to encapsulate, then determine at the source device of this data flow of bottom (underlay) network repeating and object equipment; To determine between described source device and object equipment whether built vertical multi-protocol label switching traffic engineering mpls-te tunnel further;
Described processing unit, if determine not set up MPLS traffic engineering tunnel between described source device and object equipment for described determining unit, then issue the configuration of setting up MPLS traffic engineering tunnel to described source device and object equipment, to make to set up the MPLS traffic engineering tunnel meeting described bandwidth requirement between described source device and object equipment; And be the MPLS traffic engineering tunnel distribution pressure forwarding mark of described foundation; Issue stream forwarding list to described VTEP equipment, described stream forwarding list comprises described pressure and forwards mark, makes described VTEP equipment forward mark according to described stream forwarding list to carrying described pressure during described source device transmitting data flow; On the interface that described source device is connected with described VTEP equipment, issue forwarding strategy, described forwarding strategy be used to indicate by described interface to carry described force forward mark data flow time, send described data flow by described MPLS traffic engineering tunnel.
From technical scheme above, in the application, SDN controller is to the data flow having bandwidth requirement, determine that this data flow is at the source device of underlay network repeating and object equipment, and make between described source device and object equipment, to set up the MPLS traffic engineering tunnel meeting bandwidth requirement; And distribution forces forwarding mark to make described data flow be sent by described MPLS traffic engineering tunnel when underlay network repeating.To the tenant having bandwidth requirement, when flow transmits in underlay network, Bandwidth guaranteed can be obtained.
Accompanying drawing explanation
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 diagram;
Fig. 3 is forwarding data flow apparatus structure schematic diagram in SDN in the embodiment of the present application.
Embodiment
In order to make object of the present invention, technical scheme and advantage clearly understand, below in conjunction with accompanying drawing and according to embodiment, technical scheme of the present invention is described in detail.
Be forwarding data flow method flow schematic diagram in SDN in the embodiment of the present application see Fig. 1, Fig. 1.Concrete steps are:
Step 101, SDN controller receives virtual easily extensible local area network (LAN) endpoint of a tunnel (VXLAN TunnelEnd Point, what VTEP) equipment sent issues the request of stream forwarding list during for data flow, the VXLAN mark that described SDN controller stores if determine identifies corresponding bandwidth requirement with the VXLAN that there is this data flow in the corresponding table of bandwidth requirement and need to encapsulate, then determine at the source device of this data flow of underlay network repeating and object equipment.
When specific implementation, if certain tenant needs when transmitting data stream obtains Bandwidth guaranteed in underlay network, can configure and store this tenant, the bandwidth requirement that the VXLAN mark that namely this tenant is corresponding is corresponding.
When SDN controller receives the request issuing stream forwarding list, for corresponding data stream determine VXLAN tunnel be correlated with packaging information time, also need to determine that corresponding VXLAN identifies whether corresponding bandwidth requirement, if, then by the technical scheme that the application provides, determine at the source device of this data flow of underlay network repeating and object equipment; Otherwise, by existing realization.
In this step, SDN controller is determined, at the source device of this data flow of underlay network repeating and object equipment, specifically to comprise:
SDN controller determines source address and the destination address in the VXLAN tunnel forwarding described data flow according to the source address of described data flow and destination address; Determine the equipment of VTEP equipment access underlay network corresponding for described source address as described source device; Determine the equipment of VTEP equipment access underlay network corresponding for described destination address as described object equipment.
Source address and the destination address in the VXLAN tunnel needing encapsulation determined by SDN controller in overlay network during according to the source IP address of described data flow and object IP address, if the object IP address of this data flow is the IP address of the VM in this overlay network, and the source IP address of this data flow and object IP address are when belonging to same VXLAN, then the object IP address in the VXLAN tunnel determined is the address of the VTEP equipment be connected with object VM; Otherwise the object IP address in the VXLAN tunnel determined is the address of the VTEP equipment in gateway device.
Step 102, whether built vertical mpls-te tunnel to be determined between described source device and object equipment by this SDN controller.
Step 103, MPLS traffic engineering tunnel is not set up between described source device and object equipment if determine, then described SDN controller issues the configuration of setting up MPLS traffic engineering tunnel to described source device and object equipment, to make to set up the MPLS traffic engineering tunnel meeting described bandwidth requirement between described source device and object equipment.
The MPLS traffic engineering tunnel set up in this step can be two-way MPLS traffic engineering tunnel, described SDN controller issues the configuration of setting up MPLS traffic engineering tunnel to described source device and object equipment, to make to set up the MPLS traffic engineering tunnel meeting described bandwidth requirement between described source device and object equipment, comprising:
Described SDN controller issues the configuration of the MPLS LSR ID of described source device as the source address of two-way MPLS traffic engineering tunnel to described source device, and issues the configuration of the MPLS LSR ID of described object equipment as the destination address of described two-way MPLS traffic engineering tunnel to described object equipment;
Described SDN controller is when receiving the path computing request as active devices transmission in described source device and object equipment, for described two-way MPLS traffic engineering tunnel calculates the path meeting described bandwidth requirement, and result of calculation is returned to described active devices, complete the foundation of described two-way MPLS traffic engineering tunnel.
Step 104, described SDN controller is that the MPLS traffic engineering tunnel of described foundation distributes pressure forwarding mark.
MPLS traffic engineering tunnel for setting up in this step is distributed forces to forward mark, is the VTEP equipment be connected with the source device of the mpls-te tunnel set up and the VTEP apparatus bound be connected with object equipment and distributes to force to forward and identify.
Described pressure forwards mark and can overallly uniquely distribute, and also can be that interface is here the interface of the VTEP equipment be connected with access device for a unique distribution of the interface overall situation.
In step 104, SDN controller is after the MPLS traffic engineering tunnel of described foundation distributes pressure forwarding mark, SDN controller records Bandwidth guaranteed list item further, and described Bandwidth guaranteed list item comprises: VXLAN mark, the address of VTEP equipment of described source device connection, the address of the VTEP equipment of described object equipment connection and described pressure forward mark.
Wherein, described VXLAN is designated the VXLAN mark that this data flow determined according to this data flow needs encapsulation; The address of the VTEP equipment that described source device connects is the source address determining to forward the VXLAN tunnel of described data flow according to the source address of described data flow and destination address; The address of the VTEP equipment of described object equipment connection is the destination address determining to forward the VXLAN tunnel of described data flow according to the source address of described data flow and destination address.
This Bandwidth guaranteed list item to be used for determining between source device and object equipment whether built vertical MPLS traffic engineering tunnel, determines that the VXLAN whether comprising the encapsulation of described needs in the VXLAN mark that the MPLS traffic engineering tunnel set up is corresponding identifies, is implemented as follows:
SDN controller to be determined between described source device and object equipment to comprise whether built vertical MPLS traffic engineering tunnel:
SDN controller determines whether the address of the VTEP equipment of described source device and object equipment connection can match corresponding Bandwidth guaranteed list item, if so, determines built vertical MPLS traffic engineering tunnel between described source device and object equipment; Otherwise, determine not set up MPLS traffic engineering tunnel between described source device and object equipment.
Wherein, the address of the VTEP equipment of described source device and object equipment connection is the source address in the VXLAN tunnel of the described data flow of forwarding determined according to source address and the destination address of described data flow and destination address.
Step 105, described SDN controller issues stream forwarding list to described VTEP equipment, and described stream forwarding list comprises described pressure and forwards mark, makes described VTEP equipment forward mark according to described stream forwarding list to carrying described pressure during described source device transmitting data flow.
The stream forwarding list issued to VTEP equipment in this step only increases by one to be forced to forward mark, and other guide is all with existing realization.
Data flow carries the described concrete form forcing to forward mark, determine according to specific implementation, realize as used priority forcing to forward mark, then carry this pressure when data flow VXLAN encapsulates at precedence field and forward mark, when access device receives the data of this VXLAN encapsulation, be this data stream recovery priority according to message protocol;
If non-existent field contents realizes forcing to forward mark in use message, then in the reserved field in the data flow of VXLAN encapsulation or the extra field that increases carry this pressure and forward mark; When access device receives the data of VXLAN encapsulation, directly this pressure is forwarded mark and delete.
Step 106, the interface that described SDN controller is connected with described VTEP equipment to described source device issues forwarding strategy, described forwarding strategy be used to indicate by described interface to carry described force forward mark data flow time, send described data flow by described MPLS traffic engineering tunnel.
Described SDN controller also to the VTEP equipment corresponding with the destination address in described VXLAN tunnel on described object equipment be connected interface on issue described forwarding strategy.
The execution sequence of step 105 and step 106 does not limit, and preferably first performs step 106 and performs step 105 again.
When performing step 102, if built vertical MPLS traffic engineering tunnel between described source device and object equipment determined by SDN controller, determine that the VXLAN whether comprising the encapsulation of described needs in the VXLAN mark that the MPLS traffic engineering tunnel set up is corresponding identifies further.
SDN controller determines that the VXLAN whether comprising the encapsulation of described needs in the VXLAN mark that the MPLS traffic engineering tunnel set up is corresponding identifies, and comprising:
Described SDN controller determine described in whether comprise the encapsulation of described needs in VXLAN mark in the Bandwidth guaranteed list item that matches VXLAN identify; If described in VXLAN mark in the Bandwidth guaranteed list item that matches comprise the VXLAN mark of described needs encapsulation, then determine that VXLAN mark corresponding to the MPLS traffic engineering tunnel set up comprises the VXLAN that described needs encapsulate and identify; If described in do not comprise the VXLAN mark of described needs encapsulation in VXLAN mark in the Bandwidth guaranteed list item that matches, then determine not comprise in the VXLAN mark that the MPLS traffic engineering tunnel set up is corresponding the VXLAN that described needs encapsulate and identify.
When not comprising the VXLAN mark of described needs encapsulation in the VXLAN mark that the MPLS traffic engineering tunnel set up described in determining is corresponding, described SDN controller recalculates the path of this MPLS traffic engineering tunnel, described in the bandwidth in the path of this MPLS traffic engineering tunnel that recalculates be not less than described in the MPLS traffic engineering tunnel the set up bandwidth requirement of data flow forwarded and the VXLAN that described needs encapsulate identify corresponding bandwidth requirement with; And source device corresponding to the MPLS traffic engineering tunnel set up described in result of calculation is sent to and object equipment, the source device that the MPLS traffic engineering tunnel set up described in making is corresponding and object equipment complete the foundation of this mpls-te tunnel again;
Described SDN controller issues to described VTEP equipment the pressure comprised for described MPLS traffic engineering tunnel distribution of having set up and forwards the stream forwarding list identified.
SDN controller, when issuing stream forwarding list to described VTEP, also carries out the record of Bandwidth guaranteed list item, the described VXLAN of the encapsulation mark that needs can be added in corresponding Bandwidth guaranteed list item, also can preserve a Bandwidth guaranteed list item again.
When comprising the VXLAN mark of described needs encapsulation in the VXLAN mark that the MPLS traffic engineering tunnel set up described in determining is corresponding, described SDN controller issues the stream forwarding list of the pressure forwarding mark comprised for described MPLS traffic engineering tunnel distribution of having set up to described VTEP equipment.
In the embodiment of the present application, when not comprising the VXLAN mark of described needs encapsulation in the VXLAN mark that the MPLS traffic engineering tunnel set up described in determining is corresponding, do not need to re-establish MPLS traffic engineering tunnel, but recalculate the path of this MPLS traffic engineering tunnel, described in the bandwidth in the path of this MPLS traffic engineering tunnel that recalculates meet described in the MPLS traffic engineering tunnel the set up bandwidth requirement of data flow forwarded and the VXLAN that described needs encapsulate identify corresponding bandwidth requirement with.Trigger this operation to be realized by tunnel CRLSP trustship attribute.Be implemented as follows:
When described SDN controller issues the configuration of setting up MPLS traffic engineering tunnel to described source device and object equipment, issue tunnel CRLSP trustship attribute simultaneously.
Described SDN controller is when receiving the notice of CRLSP corresponding to trustship MPLS traffic engineering tunnel that the active devices in described source device and object equipment sends, determine that described MPLS traffic engineering tunnel has been set up, and it is in trust to record CRLSP corresponding to this MPLS traffic engineering tunnel, when identifying with the VXLAN not comprising the encapsulation of described needs in the VXLAN mark that the MPLS traffic engineering tunnel determining to have set up is corresponding, trigger the path recalculating this MPLS tunnel.
Described SDN controller, when issuing tunnel CRLSP trustship attribute, can also be that described MPLS traffic engineering tunnel opens CRLSP trustship attribute timer; When timer expiry, if when also not receiving the notice of CRLSP corresponding to trustship MPLS traffic engineering tunnel that active devices sends, think that the tunnel between source device and object equipment can not set up, SDN controller is embodied as described VTEP equipment issues forwarding flow table by existing.
Be overlay networking schematic diagram see Fig. 2, Fig. 2.In Fig. 2, VM1 and VM4 belongs to same group of family, corresponding VXLAN is designated 1, VM2 and VM3 belongs to same tenant, the IP address that corresponding VXLAN is designated 2, VM1 is the IP address of IP1-1, VM4 is IP2-4, the IP address of VTEP equipment 1 is IP1, the IP address of VTEP equipment 2 is IP2, and the IP address of the interface A of device A is IPA, and the IP address of the interface B of equipment B is IPB.Present VM1 and VM4, and the cross-domain underlay network of VM2 with VM3 communicates.It is that to identify 2 corresponding bandwidth requirements be 20M for 10M, VXLAN that VXLAN identifies 1 corresponding bandwidth requirement.
First send data flow to VM4 with VM1 below, it is example that VM2 sends data flow to VM3 again, and idiographic flow is as follows:
The first step, it is the data flow of IP2-4 that VM1 sends object IP address to VTEP1, namely needs the data flow being sent to VM4.
Second step, when VTEP1 receives the data flow of VM1 transmission, the tuple information according to this data flow checks the stream forwarding list of answering in this locality, if found, forwards, process ends according to the stream forwarding list found; If do not found, then send the request issuing stream forwarding list for this data flow to SDN controller.
VTEP1 send to SDN controller issue the request of stream forwarding list time, send on this data flow can being packed, also can only on give the tuple information of this data flow.
3rd step, SDN controller receive VTEP equipment 1 send issue the request of stream forwarding list for this data flow time, if determine that VXLAN mark needs the VXLAN for this data stream to identify 1 corresponding bandwidth requirement with existing in the corresponding table of bandwidth requirement according to this request, then determine at the source device (device A) of this data flow of bottom underlay network repeating and object equipment (equipment B).
SDN controller is defined as the VXLAN mark 1 of this data stream according to the source IP address IP1-1 of data flow and object IP address ip 2-4, then identifies at VXLAN and determine in the corresponding table of bandwidth requirement that VXLAN identifies 1 corresponding bandwidth requirement 10M.
SDN controller determines that VXLAN identifies the VXLAN tunnel of 1 correspondence, and determine the source address in this VXLAN tunnel to be the address ip 1 of VTEP1 and destination address be the address ip 2 of VTEP2, then determine the down hop (the IP address (IPA) of the interface A of device A) of VTEP1 default route and the down hop (the IP address (IPB) of the interface B of equipment B) of VTEP2 default route according to network topology.
Device A belonging to interface A is defined as source device by SDN controller, and the equipment B belonging to interface B is defined as object equipment.
4th step, the MPLS LSR ID of SDN controller determination device A is as the source IP address setting up two-way MPLS traffic engineering tunnel between device A and equipment B, and the MPLS LSR ID of equipment B is as the object IP address setting up two-way MPLS traffic engineering tunnel between device A and equipment B.
5th step, SDN controller will set up source IP address and the object IP address of two-way MPLS traffic engineering tunnel, and bandwidth requirement and CRLSP trustship attribute are handed down to described source device and object equipment, and start the CRLSP trustship attribute timer for described two-way MPLS traffic engineering tunnel.
6th step, the active devices (active devices is determined by SDN controller, is assumed to be device A) in device A and equipment B sends the path computing request calculating and meet bandwidth requirement 10M to SDN equipment.During specific implementation, can be sent request by PCEP agreement.
7th step, when SDN controller receives this request, calculates by the topological database of this locality the path meeting bandwidth requirement, if calculate successfully, then to device A return path checkout result, performs the 8th step; If calculate unsuccessful, then return the response that can not calculate the path meeting described bandwidth requirement to device A, issue stream forwarding list by the existing VTEP1 of being embodied as, process ends.
In order to save content, the relevant configuration information not set up two-way MPLS traffic engineering tunnel can be deleted.
8th step, device A receives the path computation result that SDN controller returns, and completes the foundation of two-way mpls-te tunnel, and notifies the CRLSP that this two-way MPLS traffic engineering tunnel of SDN controller trustship is corresponding.
9th step, when SDN controller receives the notice of CRLSP corresponding to this two-way MPLS traffic engineering tunnel of trustship that device A sends before timer expiry, know that two-way MPLS traffic engineering tunnel is successfully established, and it is in trust to record CRLSP corresponding to this MPLS traffic engineering tunnel, performs the tenth step; If when the CRLSP trustship attribute timer expiry started, do not receive the notice of CRLSP corresponding to this two-way MPLS traffic engineering tunnel of trustship that device A sends, then issue stream forwarding list by existing realization to VTEP equipment 1, process ends.
Tenth step, SDN controller is that the two-way MPLS traffic engineering tunnel set up distributes pressure forwarding mark, and sets up Bandwidth guaranteed list item.This Bandwidth guaranteed list item comprises: VXLAN mark 1, the IP address ip 1 of VTEP equipment 1, the IP address ip 2 of VTEP2 and described pressure forward mark.
11 step, SDN controller issues forwarding strategy to the interface A of device A and the interface B of equipment B, and issues the stream forwarding list of the pressure forwarding mark comprised for described MPLS traffic engineering tunnel distribution of having set up to VTEP equipment 1.
12 step, described stream compression is issued device A according to the stream forwarding list received by VTEP equipment 1, and described data flow is carried described pressure and forwarded mark.
13 step, when device A receives described data flow by interface A, forwarding strategy according to configuration is sent carrying the described data flow forwarding mark by corresponding two-way MPLS traffic engineering tunnel, after sending to equipment B by described two-way MPLS traffic engineering tunnel, the process being transmitted to VM4 again, with existing realization, is not described in detail.
14 step, it is the data flow of IP2-3 that VM2 sends object IP address to VTEP1, namely needs the data flow being sent to VM3.
15 step, VTEP equipment 1 receives the data flow that VM2 sends, and when not finding corresponding stream forwarding list, sends the request issuing stream forwarding list for this data flow to SDN controller.
16 step, when SDN controller receives the request of VTEP equipment 1 transmission, when determining to need the VXLAN of encapsulation to identify 2 corresponding bandwidth requirement 20M, the IP address 1 of the VTEP equipment 1 connected with source device (device A) and the IP address 2 of VTEP equipment 2 that is connected with object equipment (equipment B) is used in Bandwidth guaranteed list item, to match corresponding list item, from the Bandwidth guaranteed list item of the tenth step record; Determine not comprise VXLAN mark 2 in VXLAN mark corresponding in the Bandwidth guaranteed list item matched, and the CRLSP recording this two-way MPLS traffic engineering tunnel corresponding is in trust, then re-start path computing (bandwidth in the path recalculated is not less than 30M) for described two-way MPLS traffic engineering tunnel, and path computation result is returned to device A and equipment B re-establishes described two-way MPLS traffic engineering tunnel.
17 step, VXLAN mark 2 is added in the Bandwidth guaranteed list item matched by SDN controller, and issues the stream forwarding list of the pressure forwarding mark comprised for described MPLS traffic engineering tunnel distribution of having set up to VTEP equipment.
Synchronous 12 and 13 steps of follow-up forwarding process are similar, are not described in detail.
Based on same inventive concept, the application also proposes stream compression transmitting apparatus in a kind of software defined network.Be forwarding data flow apparatus structure schematic diagram in SDN in the embodiment of the present application see Fig. 3, Fig. 3.This device comprises: receiving element 301, determining unit 302 and processing unit 303.
Receiving element 301, for receiving the request issuing stream forwarding list for data flow that VTEP equipment sends;
Determining unit 302, for receive when receiving element 301 VTEP equipment send issue the request of stream forwarding list for data flow time, the VLAN VXLAN stored if determine identifies and identifies corresponding bandwidth requirement with the VXLAN that there is this data flow in the corresponding table of bandwidth requirement and need to encapsulate, then determine at the source device of this data flow of bottom (underlay) network repeating and object equipment; To determine between described source device and object equipment whether built vertical multi-protocol label switching traffic engineering mpls-te tunnel further;
Processing unit 303, if determine not set up MPLS traffic engineering tunnel between described source device and object equipment for determining unit 302, then issue the configuration of setting up MPLS traffic engineering tunnel to described source device and object equipment, to make to set up the MPLS traffic engineering tunnel meeting described bandwidth requirement between described source device and object equipment; And be the MPLS traffic engineering tunnel distribution pressure forwarding mark of described foundation; Issue stream forwarding list to described VTEP equipment, described stream forwarding list comprises described pressure and forwards mark, makes described VTEP equipment forward mark according to described stream forwarding list to carrying described pressure during described source device transmitting data flow; On the interface that described source device is connected with described VTEP equipment, issue forwarding strategy, described forwarding strategy be used to indicate by described interface to carry described force forward mark data flow time, send described data flow by described MPLS traffic engineering tunnel.
Preferably,
Determining unit 302, specifically for determining when the source device of this data flow of underlay network repeating and object equipment, determines source address and the destination address in the VXLAN tunnel forwarding described data flow according to the source address of described data flow and destination address; Determine the equipment of VTEP equipment access underlay network corresponding for described source address as described source device; Determine the equipment of VTEP equipment access underlay network corresponding for described destination address as described object equipment;
Receiving element 301, is further used for RX path computation requests;
Processing unit 303, specifically for issuing the configuration of setting up MPLS traffic engineering tunnel to described source device and object equipment, when meeting the mpls-te tunnel of described bandwidth requirement to make to set up between described source device and object equipment, issue the configuration of the MPLS LSR ID of described source device as the source address of described two-way MPLS traffic engineering tunnel to described source device, and issue the configuration of the MPLS LSR ID of described object equipment as the destination address of described two-way MPLS traffic engineering tunnel to described object equipment; When receiving element 301 receives the path computing request as active devices transmission in described source device and object equipment, for described two-way MPLS traffic engineering tunnel calculates the path meeting described bandwidth requirement, and result of calculation is returned to described active devices, with the foundation making described source device and object equipment complete described two-way MPLS traffic engineering tunnel.
Preferably,
Processing unit 303, be further used for the VTEP equipment corresponding with the destination address in described VXLAN tunnel on described object equipment be connected interface on issue described forwarding strategy.
Preferably,
Determining unit 302, determines built vertical MPLS traffic engineering tunnel between described source device and object equipment if be further used for, determine that the VXLAN whether comprising the encapsulation of described needs in the VXLAN mark that the MPLS traffic engineering tunnel set up is corresponding identifies;
Processing unit 303, be further used for when not comprising the VXLAN mark of described needs encapsulation in the VXLAN mark that the MPLS traffic engineering tunnel set up described in determining unit 302 is determined is corresponding, described SDN controller recalculates the path of this MPLS traffic engineering tunnel, described in the bandwidth in the path of this MPLS traffic engineering tunnel that recalculates be not less than described in the MPLS traffic engineering tunnel the set up bandwidth requirement of data flow forwarded and the VXLAN that described needs encapsulate identify corresponding bandwidth requirement with; And source device corresponding to the MPLS traffic engineering tunnel set up described in result of calculation is sent to and object equipment, the source device that the MPLS traffic engineering tunnel set up described in making is corresponding and object equipment complete the foundation of this MPLS traffic engineering tunnel again; Issue to described VTEP equipment the pressure comprised for described MPLS traffic engineering tunnel distribution of having set up and forward the stream forwarding list identified.
Preferably,
Processing unit 303, be further used for, when comprising the VXLAN mark of described needs encapsulation in the VXLAN mark that the MPLS traffic engineering tunnel set up described in determining unit 302 is determined is corresponding, issuing the stream forwarding list of the pressure forwarding mark comprised for described MPLS traffic engineering tunnel distribution of having set up to described VTEP equipment.
Preferably,
Processing unit 303, when being further used for the MPLS traffic engineering tunnel distribution pressure forwarding mark for described foundation, record Bandwidth guaranteed list item, described Bandwidth guaranteed list item comprises: VXLAN mark, the address of VTEP equipment of described source device connection, the address of the VTEP equipment of described object equipment connection and pressure forward mark;
Determining unit 302, specifically for determine between described source device and object equipment whether built vertical MPLS traffic engineering tunnel time, determine whether the address of the VTEP equipment of described source device and object equipment connection can match corresponding Bandwidth guaranteed list item, if so, built vertical MPLS traffic engineering tunnel between described source device and object equipment is determined; Otherwise, determine not set up MPLS traffic engineering tunnel between described source device and object equipment; When determining whether to comprise the VXLAN mark of described needs encapsulation in the VXLAN mark that the MPLS traffic engineering tunnel set up is corresponding, whether comprise the VXLAN that described needs encapsulate in the VXLAN mark in the Bandwidth guaranteed list item matched described in determining and identify; If described in VXLAN mark in the Bandwidth guaranteed list item that matches comprise the VXLAN mark of described needs encapsulation, then determine that VXLAN mark corresponding to the MPLS traffic engineering tunnel set up comprises the VXLAN that described needs encapsulate and identify; If described in do not comprise the VXLAN mark of described needs encapsulation in VXLAN mark in the Bandwidth guaranteed list item that matches, then determine not comprise in the VXLAN mark that the MPLS traffic engineering tunnel set up is corresponding the VXLAN that described needs encapsulate and identify.
The unit of above-described embodiment can be integrated in one, and also can be separated deployment; A unit can be merged into, also can split into multiple subelement further.
In sum, in the application, SDN controller is to the data flow having bandwidth requirement, determines that this data flow is at the source device of underlay network repeating and object equipment, and makes to set up the MPLS traffic engineering tunnel meeting bandwidth requirement between described source device and object equipment; And distribution forces forwarding mark to make described data flow be sent by described MPLS traffic engineering tunnel when underlay network repeating.To the tenant having bandwidth requirement, when flow transmits in underlay network, Bandwidth guaranteed can be obtained.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, within the spirit and principles in the present invention all, any amendment made, equivalent replacement, improvement etc., all should be included within the scope of protection of the invention.
Claims (12)
1. a stream compression forwarding method in software defined network SDN, it is characterized in that, the method comprises:
SDN controller receive virtual easily extensible local area network (LAN) endpoint of a tunnel VTEP equipment send issue the request of stream forwarding list for data flow time, the VLAN VXLAN that described SDN controller stores if determine identifies and identifies corresponding bandwidth requirement with the VXLAN that there is this data flow in the corresponding table of bandwidth requirement and need to encapsulate, then determine at the source device of this data flow of bottom underlay network repeating and object equipment;
Whether built vertical multiprotocol label switching MPLS TE tunnel of traffic engineering to be determined between described source device and object equipment by described SDN controller;
MPLS traffic engineering tunnel is not set up between described source device and object equipment if determine, then described SDN controller issues the configuration of setting up MPLS traffic engineering tunnel to described source device and object equipment, to make to set up the MPLS traffic engineering tunnel meeting described bandwidth requirement between described source device and object equipment;
Described SDN controller is that the MPLS traffic engineering tunnel of described foundation distributes pressure forwarding mark;
Described SDN controller issues stream forwarding list to described VTEP equipment, and described stream forwarding list comprises described pressure and forwards mark, makes described VTEP equipment when described source device forwards this data flow, carry described pressure according to described stream forwarding list and forwards mark;
The interface that described SDN controller is connected with described VTEP equipment to described source device issues forwarding strategy, described forwarding strategy be used to indicate by described interface to carry described force forward mark data flow time, send described data flow by described MPLS traffic engineering tunnel.
2. method according to claim 1, is characterized in that, describedly determines, at the source device of this data flow of underlay network repeating and object equipment, to comprise:
Described SDN controller determines source address and the destination address in the VXLAN tunnel forwarding described data flow according to the source address of described data flow and destination address; Determine the equipment of VTEP equipment access underlay network corresponding for described source address as described source device; Determine the equipment of VTEP equipment access underlay network corresponding for described destination address as described object equipment;
Described SDN controller issues the configuration of setting up MPLS traffic engineering tunnel to described source device and object equipment, to make to set up the MPLS traffic engineering tunnel meeting described bandwidth requirement between described source device and object equipment, comprising:
Described SDN controller issues to described source device and the MPLS label switching path LSR of described source device is identified the configuration of ID as the source address of two-way MPLS traffic engineering tunnel, and issues the configuration of the MPLS LSR ID of described object equipment as the destination address of described two-way MPLS traffic engineering tunnel to described object equipment;
Described SDN controller is when receiving the path computing request as active devices transmission in described source device and object equipment, for described two-way MPLS traffic engineering tunnel calculates the path meeting described bandwidth requirement, and result of calculation is returned to described active devices, with the foundation making described source device and object equipment complete described two-way mpls-te tunnel.
3. method according to claim 2, is characterized in that, described method comprises further:
Described SDN controller to the VTEP equipment corresponding with the destination address in described VXLAN tunnel on described object equipment be connected interface on issue described forwarding strategy.
4. the method according to claim 1-3 any one, is characterized in that, described method comprises further:
If built vertical MPLS traffic engineering tunnel between described source device and object equipment determined by described SDN controller, determine that the VXLAN whether comprising the encapsulation of described needs in the VXLAN mark that the MPLS traffic engineering tunnel set up is corresponding identifies;
When not comprising the VXLAN mark of described needs encapsulation in the VXLAN mark that the MPLS traffic engineering tunnel set up described in determining is corresponding, described SDN controller recalculates the path of this MPLS traffic engineering tunnel, described in the bandwidth in the path of this MPLS traffic engineering tunnel that recalculates be not less than described in the MPLS traffic engineering tunnel the set up bandwidth requirement of data flow forwarded and the VXLAN that described needs encapsulate identify corresponding bandwidth requirement with; And source device corresponding to the MPLS traffic engineering tunnel set up described in result of calculation is sent to and object equipment, the source device that the MPLS traffic engineering tunnel set up described in making is corresponding and object equipment complete the foundation of this mpls-te tunnel again;
Described SDN controller issues to described VTEP equipment the pressure comprised for described MPLS traffic engineering tunnel distribution of having set up and forwards the stream forwarding list identified.
5. method according to claim 4, is characterized in that, described method comprises further:
When comprising the VXLAN mark of described needs encapsulation in the VXLAN mark that the MPLS traffic engineering tunnel set up described in determining is corresponding, described SDN controller is that described VTEP equipment issues the pressure forwarding mark stream forwarding list comprised for described MPLS traffic engineering tunnel distribution of having set up.
6. method according to claim 5, it is characterized in that, described SDN controller is after the MPLS traffic engineering tunnel of described foundation distributes pressure forwarding mark, described method comprises further: record Bandwidth guaranteed list item, and described Bandwidth guaranteed list item comprises: VXLAN mark, the address of VTEP equipment of described source device connection, the address of the VTEP equipment of described object equipment connection and pressure forward mark;
Described SDN controller to be determined between described source device and object equipment to comprise whether built vertical MPLS traffic engineering tunnel:
Determine whether the address of the VTEP equipment of described source device and object equipment connection can match corresponding Bandwidth guaranteed list item, if so, determines built vertical MPLS traffic engineering tunnel between described source device and object equipment; Otherwise, determine not set up MPLS traffic engineering tunnel between described source device and object equipment;
Whether comprise the VXLAN mark of described needs encapsulation in the VXLAN mark that the described MPLS traffic engineering tunnel determining to have set up is corresponding, comprising:
Described SDN controller determine described in whether comprise the encapsulation of described needs in VXLAN mark in the Bandwidth guaranteed list item that matches VXLAN identify; If described in VXLAN mark in the Bandwidth guaranteed list item that matches comprise the VXLAN mark of described needs encapsulation, then determine that VXLAN mark corresponding to the MPLS traffic engineering tunnel set up comprises the VXLAN that described needs encapsulate and identify; If described in do not comprise the VXLAN mark of described needs encapsulation in VXLAN mark in the Bandwidth guaranteed list item that matches, then determine not comprise in the VXLAN mark that the MPLS traffic engineering tunnel set up is corresponding the VXLAN that described needs encapsulate and identify.
7. a stream compression transmitting apparatus in software defined network SDN, is characterized in that, this device comprises: receiving element, determining unit and processing unit;
Described receiving element, for receiving the request issuing stream forwarding list for data flow that virtual easily extensible local area network (LAN) endpoint of a tunnel VTEP equipment sends;
Described determining unit, for receive when described receiving element VTEP equipment send issue the request of stream forwarding list for data flow time, the VLAN VXLAN stored if determine identifies and identifies corresponding bandwidth requirement with the VXLAN that there is this data flow in the corresponding table of bandwidth requirement and need to encapsulate, then determine at the source device of this data flow of bottom (underlay) network repeating and object equipment; To determine between described source device and object equipment whether built vertical multi-protocol label switching traffic engineering MPLS traffic engineering tunnel further;
Described processing unit, if determine not set up MPLS traffic engineering tunnel between described source device and object equipment for described determining unit, then issue the configuration of setting up MPLS traffic engineering tunnel to described source device and object equipment, to make to set up the MPLS traffic engineering tunnel meeting described bandwidth requirement between described source device and object equipment; And be the MPLS traffic engineering tunnel distribution pressure forwarding mark of described foundation; Issue stream forwarding list to described VTEP equipment, described stream forwarding list comprises described pressure and forwards mark, makes described VTEP equipment forward mark according to described stream forwarding list to carrying described pressure during described source device transmitting data flow; On the interface that described source device is connected with described VTEP equipment, issue forwarding strategy, described forwarding strategy be used to indicate by described interface to carry described force forward mark data flow time, send described data flow by described MPLS traffic engineering tunnel.
8. device according to claim 7, is characterized in that,
Described determining unit, specifically for determining when the source device of this data flow of underlay network repeating and object equipment, determines source address and the destination address in the VXLAN tunnel forwarding described data flow according to the source address of described data flow and destination address; Determine the equipment of VTEP equipment access underlay network corresponding for described source address as described source device; Determine the equipment of VTEP equipment access underlay network corresponding for described destination address as described object equipment;
Described receiving element, is further used for RX path computation requests;
Described processing unit, specifically for issuing the configuration of setting up MPLS traffic engineering tunnel to described source device and object equipment, when meeting the MPLS traffic engineering tunnel of described bandwidth requirement to make to set up between described source device and object equipment, issue to described source device and the MPLS label switching path LSR of described source device is identified the configuration of ID as the source address of described two-way MPLS traffic engineering tunnel, and issue the configuration of the MPLS LSR ID of described object equipment as the destination address of described two-way MPLS traffic engineering tunnel to described object equipment; When described receiving element receives the path computing request as active devices transmission in described source device and object equipment, for described two-way MPLS traffic engineering tunnel calculates the path meeting described bandwidth requirement, and result of calculation is returned to described active devices, with the foundation making described source device and object equipment complete described two-way MPLS traffic engineering tunnel.
9. device according to claim 8, is characterized in that,
Described processing unit, be further used for the VTEP equipment corresponding with the destination address in described VXLAN tunnel on described object equipment be connected interface on issue described forwarding strategy.
10. the device according to claim 7-9 any one, is characterized in that,
Described determining unit, determines built vertical mpls-te tunnel between described source device and object equipment if be further used for, determine that the VXLAN whether comprising the encapsulation of described needs in the VXLAN mark that the MPLS traffic engineering tunnel set up is corresponding identifies;
Described processing unit, be further used for when not comprising the VXLAN mark of described needs encapsulation in the VXLAN mark that the MPLS traffic engineering tunnel set up described in described determining unit is determined is corresponding, described SDN controller recalculates the path of this MPLS traffic engineering tunnel, described in the bandwidth in the path of this MPLS traffic engineering tunnel that recalculates be not less than described in the MPLS traffic engineering tunnel the set up bandwidth requirement of data flow forwarded and the VXLAN that described needs encapsulate identify corresponding bandwidth requirement with; And source device corresponding to the MPLS traffic engineering tunnel set up described in result of calculation is sent to and object equipment, the source device that the MPLS traffic engineering tunnel set up described in making is corresponding and object equipment complete the foundation of this MPLS traffic engineering tunnel again; Issue to described VTEP equipment the pressure comprised for described MPLS traffic engineering tunnel distribution of having set up and forward the stream forwarding list identified.
11. devices according to claim 10, is characterized in that,
Described processing unit, be further used for, when comprising the VXLAN mark of described needs encapsulation in the VXLAN mark that the MPLS traffic engineering tunnel set up described in described determining unit is determined is corresponding, issuing the stream forwarding list of the pressure forwarding mark comprised for described MPLS traffic engineering tunnel distribution of having set up to described VTEP equipment.
12. devices according to claim 11, is characterized in that,
Described processing unit, after being further used for the MPLS traffic engineering tunnel distribution pressure forwarding mark for described foundation, record Bandwidth guaranteed list item, described Bandwidth guaranteed list item comprises: VXLAN mark, the address of VTEP equipment of described source device connection, the address of the VTEP equipment of described object equipment connection and pressure forward mark;
Described determining unit, specifically for determine between described source device and object equipment whether built vertical mpls-te tunnel time, determine whether the address of the VTEP equipment of described source device and object equipment connection can match corresponding Bandwidth guaranteed list item, if so, built vertical MPLS traffic engineering tunnel between described source device and object equipment is determined; Otherwise, determine not set up MPLS traffic engineering tunnel between described source device and object equipment; When determining whether to comprise the VXLAN mark of described needs encapsulation in the VXLAN mark that the MPLS traffic engineering tunnel set up is corresponding, whether comprise the VXLAN that described needs encapsulate in the VXLAN mark in the Bandwidth guaranteed list item matched described in determining and identify; If described in VXLAN mark in the Bandwidth guaranteed list item that matches comprise the VXLAN mark of described needs encapsulation, then determine that VXLAN mark corresponding to the MPLS traffic engineering tunnel set up comprises the VXLAN that described needs encapsulate and identify; If described in do not comprise the VXLAN mark of described needs encapsulation in VXLAN mark in the Bandwidth guaranteed list item that matches, then determine not comprise in the VXLAN mark that the MPLS traffic engineering tunnel set up is corresponding the VXLAN that described needs encapsulate and identify.
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