CN104320322A - Message control method and equipment - Google Patents
Message control method and equipment Download PDFInfo
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Abstract
The invention provides a message control method and equipment. The message control method includes the steps that edge forwarding equipment in a channel forwarding network is obtained and is connected with a controller or a server; the controller sends a message control strategy to the edge forwarding equipment so that the edge forwarding equipment can set the priority of a message between the controller and the server as the highest priority according to the message control strategy. The message control method and equipment can guarantee that the message is sent preferentially according to the highest priority in the forwarding network, and the situation that the message between the controller and the server is abandoned is avoided as much as possible.
Description
Technical field
The present invention relates to network technology, particularly a kind of message control method and equipment.
Background technology
At software defined network (Software Defined Network, be called for short: in network architecture SDN), the control plane of the network equipment is separated with forwarding plane, by SDN controller, centralized control is carried out to network traffics, (Virtual Converged Framework is called for short: VCF) controller is wherein a kind of controller virtual application fusion architecture.In one application, can be forwarded by tunnel transmission network in the middle of message between SDN controller and service server, such as tunneled network is VXLAN network, when message then between SDN controller and service server arrives edge device (VTEP) of VXLAN, after message between SDN controller and service server is carried out tunnel encapsulation according to the form that VXLAN specifies, be forwarded to end edges equipment (VTEP), end edges equipment (VTEP) carries out decapsulation, is transmitted to SDN controller or service server afterwards.The message forwarded comprises control message, protocol massages and data message etc.For SDN controller for VCF controller, control message between VCF controller and server and protocol massages are for ensureing the timely communication of openflow passage between VCF controller and server, such as, VCF controller can issue stream table to the virtual switch OVS of server, to make OVS according to the service traffics of this stream table forwarding server.
Current problem is, above-mentioned tunnel transmission network is when carrying out encapsulate forwarded by message, for various types of message be equality forward, when VCF is when the message flow sent on the forward-path of message to the OVS of server is very large, likely there is the phenomenon that control message and protocol massages are dropped, control message and protocol massages cannot correctly be transmitted, cause the timely transmission that can not ensure session information between VCF controller and server, the business affecting server performs, such as server cannot receive the up-to-date stream table that controller issues in time, thus traffic forwarding can not be carried out according to up-to-date stream table.
Summary of the invention
In view of this, the invention provides a kind of message control method and equipment, to ensure normally carrying out of openflow session between VCF controller and server.
Particularly, the present invention is achieved through the following technical solutions:
First aspect, provides a kind of message control method, and described method is applied to software defined network SDN, and described SDN comprises the edge forwarding equipment of controller, server, tunnel transmission network and described tunnel transmission network; Described method comprises:
Described controller obtains the edge forwarding equipment in described tunnel transmission network, and described edge forwarding equipment is connected with described controller or server;
Described controller sends message control strategy to described edge forwarding equipment, according to described message control strategy, the priority of the message between described controller and server is set to high priority to make described edge forwarding equipment.
Second aspect, provides a kind of message control method, and described method is applied to software defined network SDN, and described SDN comprises the edge forwarding equipment of controller, server, tunnel transmission network and described tunnel transmission network; Described method comprises:
Described edge forwarding equipment receives the message control strategy that described controller sends;
The priority of the message between described controller and server, according to described message control strategy, is set to high priority by described edge forwarding equipment.
The third aspect, provides a kind of controller, can be applicable to software defined network SDN, and described SDN comprises the edge forwarding equipment of described controller, server, tunnel transmission network and described tunnel transmission network; Described controller comprises:
Equipment determining unit, for obtaining the edge forwarding equipment in described tunnel transmission network, described edge forwarding equipment is connected with described controller or server;
Strategy transmitting element, for sending message control strategy to described edge forwarding equipment, is set to high priority according to described message control strategy by the priority of the message between described controller and server to make described edge forwarding equipment.
Fourth aspect, provides a kind of forwarding unit, can be used as edge forwarding equipment and is applied to software defined network SDN, and described SDN comprises the edge forwarding equipment of controller, server, tunnel transmission network and described tunnel transmission network; Described forwarding unit comprises:
Policy receipt unit, for receiving the message control strategy that described controller sends;
Message control unit, for according to described message control strategy, is set to high priority by the priority of the message between described controller and server.
The message control method of the embodiment of the present invention and equipment, by by the edge device downward message control strategy of controller to tunnel transmission network, and make edge device accordingly strategy the message between controller and server is set to high priority, can ensure that the message between controller and server preferentially sends with this high priority in transmission network, reduce the generation abandoned.
Accompanying drawing explanation
Fig. 1 is the application architecture figure of the message control method that the embodiment of the present invention provides;
Fig. 2 is the server architecture figure in the message control method that provides of the embodiment of the present invention;
Fig. 3 is the schematic flow sheet of the message control method that the embodiment of the present invention provides;
Fig. 4 is the structural representation of the controller that the embodiment of the present invention provides;
Fig. 5 is the structural representation of the forwarding unit that the embodiment of the present invention provides.
Embodiment
SDN is the network being separated control plane and datum plane, and in SDN, SDN controller is control centre, is responsible for generating stream table and the forwarding unit be sent in SDN, and the stream table that forwarding unit sends according to the controller received carries out Message processing.As shown in Figure 1, network shown in this Fig. 1 is the network architecture of SDN, network comprises VCF controller 11 (the present embodiment, for VCF, also can be other controllers in concrete enforcement), transmission network 12 and multiple server 13 (comprising server 1, server 2 and server 3 etc.); Wherein, transmission network 12 is tunnel transmission networks is such as VXLAN network, the starting point edge forwarding equipment of this network is after the message receiving source device transmission, VXLAN tunnel encapsulation is carried out to message, forward at this transmission network afterwards, reach home edge forwarding equipment time carry out solution VXLAN tunnel encapsulation, send to object equipment afterwards.
Wherein, multiple virtual machine VM and OVS (Open vSwitch) can be provided with in server, see Fig. 2, OVS is a virtual switch software, virtual switch is referred to as in following embodiment, this OVS is mainly used in virtual machine VM environment, as a virtual switch, support multiple Intel Virtualization Technology, be responsible for the flow between each VM in delivery server, and realize the communication of VM and extraneous network, the traffic forwarding between certain VM in such as server 1 and certain VM in server 2.
In the present embodiment, openflow session connection is set up between OVS in VCF controller 11 and server, Openflow is define in SDN framework one communication interface standard between controller and forwarding, allow the Forwarding plane of directly access and operational network equipment, communicated by Openflow passage (Openflow Channel) between VCF controller 11 and the OVS in server.This Openflow passage is also through the transmission network 12 shown in Fig. 1, than a wherein Openflow passage 14 as illustrated in fig. 1, this passage is used for communicating between VCF controller 11 with the OVS of server 1, the OVS of such as server 1 is to VCF controller report equipment state, or VCF controller issues stream table etc. to OVS.
Concrete, be control message and protocol massages by the message of openflow channel transfer between VCF controller 11 and the OVS of server, such as both set up certain message such as instruction or stream table that the message of openflow session connection or server issue to the message of controller report Interface status or controller to the OVS of server; And the message normally data message between server and server, such as, server 1 sends service message to server 2.Above-mentioned control message and protocol massages are very important, such as, VCF controller 11 issues stream table to OVS, OVS carries out traffic forwarding according to this stream table, such as by the traffic forwarding of the VM of server 1 to server 2 etc., therefore, need to ensure effectively sending to of control message between VCF controller 11 and OVS and protocol massages, the correctness of such guarantee OVS when carrying out business and forwarding.Suppose that control message between VCF controller 11 and OVS and protocol massages are dropped in transmitting procedure, the state message causing controller not receive server reporting, up-to-date network link status can not be got, computation mistake will perform by traffic affecting, or server can not receive the up-to-date stream table that controller issues, and also can cause the forwarding mistake of service traffics.Therefore, the message control method of the present embodiment will ensure the preferential forwarding of control message between VCF controller and OVS and protocol massages, and minimizing abandons.
Still for the openflow session between the OVS on VCF controller 11 and server 1, the message control method of the present embodiment, guarantee controller and OVS message are between the two sent with high priority all the time at passage 14, as shown in Figure 1, the edge forwarding equipment of transmission network is VxLAN tunneling termination (VxLAN Tunnel End Point, be called for short: VTEP), such as comprise VTEP1, VTEP2, VTEP3 and VTEP4, passage 14 is wherein the forwarding channels between VCF controller 11 and server 1, VTEP1 is the edge forwarding equipment be directly connected with server 1, VTEP4 is the edge forwarding equipment be directly connected with VCF controller 11.Fig. 3 shows the step of this message control method, comprising:
301, controller obtains the edge forwarding equipment in tunnel transmission network;
In this step, suppose currently will ensure that the message prior between the OVS on controller and server 1 sends, this message is sent by forwarding channel 14, this forwarding channel is communicated with the OVS of controller and server 1, this passage comprises each intermediate forwarding devices in tunnel transmission network edge forwarding equipment VTEP1, VTEP4 and network, VTEP1 is wherein connected with server, and VTEP4 is connected with controller.Controller will obtain the edge forwarding equipment in tunnel transmission network, is namely to know VTEP1 and VTEP4, and learns that VTEP1 is the edge forwarding equipment direct-connected with server, and VTEP4 is the edge forwarding equipment direct-connected with controller.
In SDN, SDN controller has the function of Topology Management, automatically can find network topology structure, and the effect of Topology Management is the information in order to monitoring and collection network repeating equipment at any time, the equipment working state of timely feedback network and link linking status.Such as, VCF controller is in order to realize Topology Management, timing can send Link Layer Discovery Protocol (Link Layer Discovery Protocol to forwarding unit, be called for short: LLDP) message, and know which port connects according to the LLDP message of forwarding unit feedback, and then whole network topology can be analyzed.After the OVS of VCF controller and server 1 sets up openflow session, VCF controller passes through topological automatic discovering, can know edge forwarding equipment VTEP1 and VTEP4 of the transmission network between itself and OVS, in an example, OVS and VTEP can on same equipment.
302, controller sends message control strategy to described edge forwarding equipment;
In this step, controller sends message control strategy to VTEP1 and VTEP4, when object is the message of notice VTEP1 and VTEP4 between transmit control device and OVS, the priority of message is set to high priority, thus ensures preferential forwarding.Such as, some forwarding units in tunnel transmission network shown in Fig. 1, its message forwarded comprises data message, the control message between controller and OVS, protocol massages, when converting flow is very large, this intermediate forwarding devices preferentially can send and control message and protocol massages, even if want dropping packets, be also first abandon data message, and the control message understood between preferential guarantee controller and OVS and protocol massages forward.
Realize forwarding unit for the preferential transmission controlling message and protocol massages, in the method for the present embodiment, be exactly by edge forwarding equipment VTEP1 and the VTEP4 transmission message control strategy of VCF controller to transmission network, VTEP1 and VTEP4 is the two-end-point on forward-path in tunnel transmission network, such as, suppose that controller sends certain control message to the OVS of server, VTEP4 is exactly the starting point forwarding unit on tunnel transmission network of this control message, instruction VTEP4 arranges this control message by the message control strategy of this step, all send with high priority to make this message (VTEP4---intermediate forwarding devices---VTEP1---OVS) on follow-up forward-path.
303, edge forwarding equipment is according to this message control strategy, and the priority of the message between described controller and server is set to high priority.
In this step, the message control strategy that edge forwarding equipment will send according to controller, is set to high priority by the priority of the message between described controller and server, makes message all preferentially send this message on forward-path.Such as, controller sends to the priority of the control message of the OVS of server 1 to be set to limit priority by edge forwarding equipment VTEP4, then the forwarding unit in the tunnel transmission network on follow-up forward-path all can E-Packet according to this limit priority; Such as, the value of the EXP in message is set to 7 (i.e. the values of limit priority) by VTEP4, then message is when being transferred to intermediate forwarding devices by VTEP4, and intermediate forwarding devices also can send this message according to this priority, thus ensure that the preferential transmission of message on whole piece path.
The message control method of the present embodiment, by sending message control strategy by SDN controller to the edge forwarding equipment of transmission network, edge forwarding equipment is preferentially sent according to this strategy setting message on forward-path, thus ensure that normally carrying out of the openflow session between VCF controller and server.
The transmission of both direction message between the following OVS describing VCF controller and server 1 respectively:
Such as, composition graphs 1, VCF controller can send message control strategy to VTEP4, this strategy instruction " when the message received from VCF controller, when its destination address is the OVS of server 1, its priority being set to high priority ".This strategy is specifically configured on its interface v1 by VTEP4, interface v1 is the interface that VTEP4 and VCF controller connects, when the destination address of the message that interface v1 receives is the OVS of server 1, this interface v1 is equivalent to the porch of message at tunnel transmission network, just the value of the EXP of message is set to the value 7 of limit priority in porch, then follow-up forwarding unit, VTEP1 etc. on transmission network path, tunnel all according to this limit priority, can ensure preferential this message of transmission.
Again such as, composition graphs 1, VCF controller can send message control strategy to VTEP1, this strategy instruction " when the message received from server, when its destination address is VCF controller, its priority being set to high priority ".This strategy is specifically configured on its interface v2 by VTEP1, interface v2 is the interface that VTEP1 is connected with server, according to strategy, when the destination address of the message that this interface v2 receives is VCF controller, the value of the EXP of message is then set to the value 7 of limit priority by VTEP1.This interface v2 is equivalent to mail to the message of VCF controller in the porch of tunnel transmission network from the OVS of server 1, just the value of the EXP of message is set to limit priority in porch, then follow-up forwarding unit, VTEP4 etc. on transmission network path, tunnel all can according to this limit priority, preferential this message of transmission.
Optionally, the VCF controller of the embodiment of the present invention sends message control strategy to edge forwarding equipment, can Provisioning Policy in the following manner:
VCF controller when initial discovering network topology just by policy distribution to each edge forwarding equipment.Such as, when the SDN shown in Fig. 1 is set up, VCF controller carries out Topology Management, learn the edge forwarding equipment be connected with VCF controller and server, such as, the edge forwarding equipment that server 1 connects is VTEP1, and the edge forwarding equipment that server 2 connects is VTEP2 etc.The priority of message to these edge forwarding equipment downward message control strategies, when the destination address of the message that instruction VTEP1 and VTEP2 receives from respective server is VCF controller, can be set to limit priority by VCF controller.
Optionally, VCF controller may not be to whole edge forwarding equipment sending strategys, but several edge forwarding equipment transmissions that selection and comparison is important.Such as, business on server 1 and server 3 is important, need to ensure the openflow session between VCF controller and this two servers, the VTEP3 that then VTEP1 that connects to server 1 of VCF controller and server 3 connect sends message control strategy, indicates these two edge forwarding equipment to be that the message priority of VCF controller is set to limit priority by destination address.Same, for the VTEP4 is connected with VCF controller, the message control strategy of controller transmission can be, when the destination address of message is the OVS of the OVS of server 1 or server 3, the priority of message is set to limit priority.
The embodiment of the present invention additionally provides a kind of controller, and this controller is such as VCF controller, and this controller can perform the method for said method embodiment of the present invention, and as shown in Figure 4, this controller can comprise: equipment determining unit 41 and tactful transmitting element 42; Wherein,
Equipment determining unit 41, for obtaining the edge forwarding equipment in described tunnel transmission network, described edge forwarding equipment is connected with described controller or server;
Strategy transmitting element 42, for sending message control strategy to described edge forwarding equipment, is set to high priority according to message control strategy by the priority of the message between described controller and server to make described edge forwarding equipment.
Further, when described edge forwarding equipment is the edge forwarding equipment be connected with described controller; This tactful transmitting element 42, specifically for sending following message control strategy to described edge forwarding equipment: if the destination address of described message is the virtual switch on described server, then the priority of this message is set to high priority.
Further, when described edge forwarding equipment is the edge forwarding equipment be connected with described server; Strategy transmitting element 42, specifically for sending following message control strategy to described edge forwarding equipment: if the destination address of described message is described controller, then the priority of this message is set to high priority.
The embodiment of the present invention additionally provides a kind of forwarding unit, this forwarding unit is the edge forwarding equipment for being connected with described controller or server in transmission network, such as VTEP1 or VTEP4 in Fig. 1, this forwarding unit can perform the method for said method embodiment of the present invention, as shown in Figure 5, this forwarding unit can comprise: Policy receipt unit 51 and message control unit 52; Wherein,
Policy receipt unit 51, for receiving the message control strategy that described controller sends;
Message control unit 52, for according to described message control strategy, is set to high priority by the priority of the message between described controller and server.
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 (10)
1. a message control method, is characterized in that, described method is applied to software defined network SDN, and described SDN comprises the edge forwarding equipment of controller, server, tunnel transmission network and described tunnel transmission network; Described method comprises:
Described controller obtains the edge forwarding equipment in described tunnel transmission network, and described edge forwarding equipment is connected with described controller or server;
Described controller sends message control strategy to described edge forwarding equipment, according to described message control strategy, the priority of the message between described controller and server is set to high priority to make described edge forwarding equipment.
2. method according to claim 1, is characterized in that, the message control strategy that described controller sends to the edge forwarding equipment be connected with this equipment, specifically comprises:
If the destination address of described message is the virtual switch on described server, the priority of this message is set to high priority.
3. method according to claim 1, is characterized in that, the message control strategy that described controller sends to the edge forwarding equipment be connected with described server, specifically comprises:
If the destination address of described message is described controller, the priority of this message is set to high priority.
4. a message control method, is characterized in that, described method is applied to software defined network SDN, and described SDN comprises the edge forwarding equipment of controller, server, tunnel transmission network and described tunnel transmission network; Described method comprises:
Described edge forwarding equipment receives the message control strategy that described controller sends;
The priority of the message between described controller and server, according to described message control strategy, is set to high priority by described edge forwarding equipment.
5. method according to claim 4, is characterized in that, when described edge forwarding equipment is the edge forwarding equipment be connected with described controller, the described message control strategy received, specifically comprises:
If the destination address of described message is the virtual switch on described server, then the priority of this message is set to high priority.
6. method according to claim 4, is characterized in that, when described edge forwarding equipment is the edge forwarding equipment be connected with described server, the described message control strategy received, specifically comprises:
If the destination address of described message is described controller, then the priority of this message is set to high priority.
7. a controller, can be applicable to software defined network SDN, and described SDN comprises the edge forwarding equipment of described controller, server, tunnel transmission network and described tunnel transmission network; It is characterized in that, described controller comprises:
Equipment determining unit, for obtaining the edge forwarding equipment in described tunnel transmission network, described edge forwarding equipment is connected with described controller or server;
Strategy transmitting element, for sending message control strategy to described edge forwarding equipment, is set to high priority according to described message control strategy by the priority of the message between described controller and server to make described edge forwarding equipment.
8. controller according to claim 7, is characterized in that, when described edge forwarding equipment is the edge forwarding equipment be connected with described controller;
Described tactful transmitting element, specifically for sending following message control strategy to described edge forwarding equipment: if the destination address of described message is the virtual switch on described server, then the priority of this message is set to high priority.
9. controller according to claim 7, is characterized in that, when described edge forwarding equipment is the edge forwarding equipment be connected with described server;
Described tactful transmitting element, specifically for sending following message control strategy to described edge forwarding equipment: if the destination address of described message is described controller, then the priority of this message is set to high priority.
10. a forwarding unit, can be used as edge forwarding equipment and is applied to software defined network SDN, and described SDN comprises the edge forwarding equipment of controller, server, tunnel transmission network and described tunnel transmission network; It is characterized in that, described forwarding unit comprises:
Policy receipt unit, for receiving the message control strategy that described controller sends;
Message control unit, for according to described message control strategy, is set to high priority by the priority of the message between described controller and server.
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| CN104320322B (en) | 2019-03-15 |
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