CN103944828A - Method and equipment for transmitting protocol messages - Google Patents
Method and equipment for transmitting protocol messages Download PDFInfo
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- CN103944828A CN103944828A CN201410150571.3A CN201410150571A CN103944828A CN 103944828 A CN103944828 A CN 103944828A CN 201410150571 A CN201410150571 A CN 201410150571A CN 103944828 A CN103944828 A CN 103944828A
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Abstract
The invention discloses a method and equipment for transmitting protocol messages. The method comprises the steps of building a port set by an SDN controller for network equipment, and recording an exchanger interface of the network equipment in the corresponding port set of the network equipment; learning host information carried in the protocol messages and host interfaces of the protocol messages received by the network equipment when the protocol messages from the network equipment are received; adding the host interfaces in the corresponding port set of the network equipment, and sending a second indicating message to the network equipment, wherein the second indicating message is used for indicating that the host interfaces are added in the port set of the network equipment; issuing a flow table to the network equipment, wherein the flow table comprises the host information and used for indicating the network equipment to send the protocol messages by utilizing an exchanger interface and/or a host interface recorded in the port set. According to the method and equipment, the number of protocol messages sent to the SDN controller can be reduced, and the processing performance of the SDN controller can be improved.
Description
Technical field
The present invention relates to communication technical field, relate in particular to a kind of transmission method and equipment of protocol massages.
Background technology
SDN(Software Defined Network, software defined network) be a kind of new network innovation framework, its core concept is that control plane is separated with forwarding plane, to realize the flexible control to network traffics, and provides good platform for the innovation of core network and application.As shown in Figure 1, for the networking schematic diagram of SDN, SDN controller, SW1, SW2, a SW3 SDN network of being built by OpenFlow agreement of composition (being called again OpenFlow network), SW1, SW2, SW3 are the switch within SDN network, RT1, RT2, RT3 are the router outside SDN network, and between RT1, RT2, RT3, mutual message need to be through the transparent transmission of SDN network.In follow-up associated description, the switch within SDN network can be called the network equipment, and router outside SDN network can be called main frame.
For multicast message mutual between main frame, because SDN controller can not generate for multicast message stream table on the network equipment, therefore the network equipment is being received after multicast message, need to process giving SDN controller on all multicast messages of receiving.Further, because the network equipment can not distinguished data message and protocol massages deliver newspaper literary composition on SDN controller time, and the network equipment can on give SDN controller message amount have certain limitation, therefore in the time that the message sending on network equipment needs is a lot, can cause some multicast protocol message cannot on deliver to SDN controller, then cause multicast protocol message cannot send in time main frame, and cause the packet loss of multicast protocol message.For example, for OSPF(Open Shortest Path First mutual between main frame, SPF) hello packet (multicast protocol message) of agreement, in the time that hello packet, in SDN network, packet loss occurs, can cause cannot normally setting up neighbours between main frame.
Summary of the invention
The embodiment of the present invention provides a kind of transmission method and equipment of protocol massages, the transmitting with guarantee agreement message in SDN network, and avoid the packet loss of protocol massages in SDN network.
In order to achieve the above object, the embodiment of the present invention provides a kind of transmission method of protocol massages, and the method is applied in the network that comprises SDN controller and multiple network equipments, said method comprising the steps of:
Described SDN controller is that each network equipment creates respectively the port set that each network equipment is corresponding, and the exchange interface of recording this network equipment in port set corresponding to the network equipment; And, sending the first Indication message to each network equipment respectively, described the first Indication message is used to indicate the port set of network equipment establishment self; Received after described the first Indication message by each network equipment, on present networks equipment, creating the port set of self, and the exchange interface of the minute book network equipment in the port set of self;
Described SDN controller, in the time of the protocol massages of receiving from the network equipment, learns to receive on the host information that carries in described protocol massages and the described network equipment host interface of described protocol massages;
Described SDN controller adds described host interface in port set corresponding to the described network equipment, and sending the second Indication message to the described network equipment, described the second Indication message is used to indicate the described network equipment and in the port set of self, adds described host interface; Receiving after described the second Indication message, in the port set of self, add described host interface by the described network equipment;
Described SDN controller issues stream table to described multiple network equipments respectively, and described stream table comprises the host information carrying in described protocol massages; Wherein, described stream table is used to indicate the network equipment in the time receiving the protocol massages of the host information carrying in can mating described protocol massages, utilizes the exchange interface and/or the host interface that in the port set of present networks equipment self, record to send described protocol massages.
Described SDN controller records the process of the exchange interface of this network equipment in port set corresponding to the network equipment, specifically comprises:
Described SDN controller calculates broadcast tree according to current network topology, the exchange interface that comprises each network equipment in described broadcast tree, and exchange interface refers to the interface between the network equipment and the network equipment;
Described SDN controller utilizes the exchange interface comprising in described broadcast tree in port set corresponding to the network equipment, to record the exchange interface of this network equipment in described broadcast tree.
On the host information carrying in described SDN controller study protocol massages and the network equipment, receive the host interface of protocol massages, specifically comprise: described SDN controller receives the Packet in message from the described network equipment, in described Packet in message, carry the protocol massages that the network equipment is received, and on the described network equipment, receive the host interface of described protocol massages, and host interface refers to the interface between the main frame outside the network equipment and described network; Described SDN controller is in the time identifying the message carrying in described Packet in message and be protocol massages, learn the host information carrying in described protocol massages, and receive the host interface of described protocol massages from the network equipment described in described Packet in message learning; Wherein, described host information specifically comprises one of following or combination in any: source medium access control MAC Address, virtual LAN VLAN information, source IP address, IP protocol type, Ethernet protocol type.
Described method further comprises:
Described SDN controller, in the time issuing stream table to the network equipment, also comprises ageing time and high-priority queue indication information in described stream table; Described ageing time is greater than the message carrying in described protocol massages and sends interval, and described high-priority queue indication information is used to indicate the protocol massages that the preferential transmission of the network equipment can be mated described host information; If the network equipment was received the protocol massages that can mate described host information before ageing time is overtime, upgrade the ageing time of described stream table, if the network equipment is not received the protocol massages that can mate described host information in the time that ageing time is overtime, delete described stream table.
Described method further comprises:
After creating respectively for each network equipment the port set that each network equipment is corresponding, if current network topology changes, described SDN controller is deleted port set corresponding to each network equipment difference, and sending respectively the 3rd Indication message to each network equipment, described the 3rd Indication message is used to indicate the port set of each network equipment deletion self; Received after described the 3rd Indication message by each network equipment, on present networks equipment, deleting the port set of self; Described SDN controller creates respectively for each network equipment the port set that each network equipment is corresponding again according to the network topology after changing, and the exchange interface of recording this network equipment in port set corresponding to the network equipment, and send the first Indication message to each network equipment respectively, received after described the first Indication message by each network equipment, on present networks equipment, create the port set of self, and the exchange interface of the minute book network equipment in the port set of self;
In port set corresponding to the network equipment, add after host interface, if the network equipment is not received and dispatched protocol massages by described host interface in Preset Time, described SDN controller is deleted described host interface from port set corresponding to the network equipment, and sending the 4th Indication message to the described network equipment, described the 4th Indication message is used to indicate the network equipment and in the port set of self, deletes described host interface; Receiving after described the 4th Indication message, in the port set of self, delete described host interface by the described network equipment.
The embodiment of the present invention provides a kind of software defined network SDN controller, is applied in the network that comprises described SDN controller and multiple network equipments, and described SDN controller specifically comprises:
Logging modle, is used to each network equipment to create respectively the port set that each network equipment is corresponding, and the exchange interface of recording this network equipment in port set corresponding to the network equipment; And, sending the first Indication message to each network equipment respectively, described the first Indication message is used to indicate the port set of network equipment establishment self; Received after described the first Indication message by each network equipment, on present networks equipment, creating the port set of self, and the exchange interface of the minute book network equipment in the port set of self;
Study module, for when the protocol massages of receiving from the network equipment, learns to receive on the host information that carries in described protocol massages and the described network equipment host interface of described protocol massages;
Add module, for adding described host interface in port set corresponding to the described network equipment, and sending the second Indication message to the described network equipment, described the second Indication message is used to indicate the described network equipment and in the port set of self, adds described host interface; Receiving after described the second Indication message, in the port set of self, add described host interface by the described network equipment;
Issue module, for issuing stream table to described multiple network equipments respectively, and described stream table comprises the host information carrying in described protocol massages; Wherein, described stream table is used to indicate the network equipment in the time receiving the protocol massages of the host information carrying in can mating described protocol massages, utilizes the exchange interface and/or the host interface that in the port set of present networks equipment self, record to send described protocol massages.
Described logging modle, specifically for calculate broadcast tree according to current network topology, the exchange interface that comprises each network equipment in described broadcast tree, and exchange interface refers to the interface between the network equipment and the network equipment; And, utilize the exchange interface comprising in described broadcast tree in port set corresponding to the network equipment, to record the exchange interface of this network equipment in described broadcast tree.
Described study module, specifically for receiving the Packet in message from the described network equipment, and carry the protocol massages that the described network equipment is received in described Packet in message, and on the described network equipment, receive the host interface of described protocol massages, and host interface refers to the interface between the main frame outside the network equipment and described network; And, in the time identifying the message carrying in described Packet in message and be protocol massages, learn the host information that carries in described protocol massages, and receive the host interface of described protocol massages from the network equipment described in described Packet in message learning; Wherein, described host information specifically comprises one of following or combination in any: source medium access control MAC Address, virtual LAN VLAN information, source IP address, IP protocol type, Ethernet protocol type.
The described module that issues, also in the time issuing stream table to the network equipment, makes also to comprise in stream table ageing time and high-priority queue indication information; Described ageing time is greater than the message carrying in described protocol massages and sends interval, and described high-priority queue indication information is used to indicate the protocol massages that the preferential transmission of the network equipment can be mated described host information; If the network equipment was received the protocol massages that can mate described host information before ageing time is overtime, upgrade the ageing time of described stream table, if the network equipment is not received the protocol massages that can mate described host information in the time that ageing time is overtime, delete described stream table.
Described logging modle, also for after creating respectively for each network equipment the port set that each network equipment is corresponding, if current network topology changes, delete port set corresponding to each network equipment difference, and sending respectively the 3rd Indication message to each network equipment, described the 3rd Indication message is used to indicate the port set of each network equipment deletion self; Received after described the 3rd Indication message by each network equipment, on present networks equipment, deleting the port set of self; Again create respectively for each network equipment the port set that each network equipment is corresponding according to the network topology after changing, and the exchange interface of recording this network equipment in port set corresponding to the network equipment, and send the first Indication message to each network equipment respectively, received after described the first Indication message by each network equipment, on present networks equipment, create the port set of self, and the exchange interface of the minute book network equipment in the port set of self;
Described interpolation module, also for adding after host interface in port set corresponding to the network equipment, if the network equipment is not received and dispatched protocol massages by described host interface in Preset Time, from port set corresponding to the network equipment, delete described host interface, and sending the 4th Indication message to the described network equipment, described the 4th Indication message is used to indicate the network equipment and in the port set of self, deletes described host interface; Receiving after described the 4th Indication message, in the port set of self, delete described host interface by the described network equipment.
Compared with prior art, the embodiment of the present invention at least has the following advantages: in the embodiment of the present invention, SDN controller is by issuing stream table to the network equipment, so that the network equipment is in the time receiving corresponding protocol massages, can utilize the exchange interface and/or the host interface that in port set, record to send protocol massages, and do not need protocol massages to send to SDN controller, thereby reduce the quantity of the protocol massages that sends to SDN controller, improve the handling property of SDN controller, and saved the CPU(central processing unit of SDN controller) resource; Further, owing to not needing that protocol massages is sent to SDN controller, therefore, can avoid protocol massages by the congested service disconnection causing that abandons, can improve the reliability that protocol massages transmits in network, avoid protocol massages in when transmission by the congested packet loss that causes of common data message.
Brief description of the drawings
Fig. 1 is the networking schematic diagram of the SDN that proposes in prior art;
Fig. 2 is the transmission method schematic flow sheet of a kind of protocol massages of providing of the embodiment of the present invention;
Fig. 3 is the structural representation of a kind of SDN controller of providing of the embodiment of the present invention.
Embodiment
For problems of the prior art, the embodiment of the present invention provides a kind of transmission method of protocol massages, the method is applied in the network that comprises SDN controller and multiple network equipments, and this network is specifically as follows SDN network (the SDN network of building by OpenFlow agreement is called again OpenFlow network).
Application scenarios schematic diagram taking Fig. 1 as the embodiment of the present invention, equipment within SDN network is the network equipment, if the switch within SDN network (SW1, SW2, SW3) is the network equipment, equipment (can be switch, router or PC etc.) outside SDN network is main frame, if the router outside SDN network (RT1, RT2, RT3) is main frame.In the embodiment of the present invention, the interface between the network equipment and the network equipment is exchange interface (Switch interface), as interface 7 and interface 8 on the interface 4 on the interface 2 on SW1 and interface 3, SW2 and interface 5, SW3, all refers to exchange interface; Interface between main frame outside the network equipment and SDN network is host interface (Host interface), as the interface 6 on interface 1, SW2 on SW1, the interface 9 on SW3, all refers to host interface.
Under above-mentioned application scenarios, as shown in Figure 2, the transmission method of this protocol massages comprises the following steps:
Step 201, SDN controller is that each network equipment creates respectively the port set that each network equipment is corresponding, and the exchange interface of recording this network equipment in port set corresponding to the network equipment, and sends the first Indication message to each network equipment respectively; Wherein, this first Indication message is used to indicate the port set of network equipment establishment self; Received after this first Indication message by each network equipment, on present networks equipment, creating the port set of self, and the exchange interface of the minute book network equipment in the port set of self.
In the embodiment of the present invention, SDN controller records the process of the exchange interface of this network equipment in port set corresponding to the network equipment, specifically comprise: SDN controller calculates broadcast tree according to current network topology the exchange interface that comprises each network equipment in this broadcast tree; Afterwards, the exchange interface of this network equipment in broadcast tree recorded in the exchange interface comprising in SDN controller utilization broadcast tree in port set corresponding to the network equipment.Wherein, when SDN controller calculates broadcast tree according to current network topology, concrete broadcast tree account form can be to adopt depth-first algorithm to calculate broadcast tree, or adopts breadth First algorithm to calculate broadcast tree, in the concrete broadcast tree account form embodiment of the present invention, repeats no more.
Under the application scenarios shown in Fig. 1, suppose to comprise in broadcast tree that SDN controller calculates following exchange interface: the interface 8 on the interface 4 on interface 3, SW2 on SW1 and interface 5, SW3.: SDN controller is that SW1 creates port set, comprises interface 3 in the port set of this SW1; SDN controller is that SW2 creates port set, comprises interface 4 and interface 5 in the port set of this SW2; SDN controller is that SW3 creates port set, comprises interface 8 in the port set of this SW3.
Further, SDN controller sends the first Indication message that is used to indicate SW1 establishment port set to SW1, after receiving the first Indication message, on this SW1, create port set, and comprise interface 3 in this port set by SW1; In addition, SDN controller sends the first Indication message that is used to indicate SW2 establishment port set to SW2, after receiving the first Indication message, on this SW2, create port set, and in this port set, comprise interface 4 and interface 5 by SW2; In addition, SDN controller sends the first Indication message that is used to indicate SW3 establishment port set to SW3, after receiving the first Indication message, on this SW3, create port set, and comprise interface 8 in this port set by SW3.
Step 202, SDN controller, in the time of the protocol massages of receiving from the network equipment, learns to receive on the host information that carries in this protocol massages and this network equipment the host interface of this protocol massages.
In specific implementation process, the network equipment is in the time of the protocol massages of receiving from main frame, if the stream table of this protocol massages coupling not, the network equipment will be given SDN controller on this protocol massages; If there is the stream table of this protocol massages coupling, the network equipment forwards this protocol massages based on this stream table, and this process is set forth in subsequent step; In this step taking the stream table of this protocol massages coupling not as example.
The network equipment is when giving SDN controller on protocol massages, the network equipment sends Packet in message to SDN controller, and in this Packet in message, at least carry the protocol massages that the network equipment is received, and on the network equipment, receive the host interface of protocol massages.Based on this, in the embodiment of the present invention, on the host information carrying in SDN controller study protocol massages and the network equipment, receive the process of the host interface of protocol massages, specifically comprise: SDN controller receives the Packet in message from the network equipment, in the time identifying the message carrying in Packet in message and be protocol massages, learn the host information carrying in this protocol massages, and receive the host interface of protocol massages from this Packet in message learning network equipment.
Concrete, SDN controller is after receiving Packet in message, owing to having protocol type field in the message carrying in this Packet in message, based on this protocol type field, SDN controller can Direct Recognition go out whether the message carrying in Packet in message is protocol massages, and the message carrying in Packet in message is while being protocol massages, identifies the type of this protocol massages, is the hello packet based on ospf protocol as SDN controller identifies this protocol massages.In addition, owing to can carrying host information in this protocol massages, therefore, SDN controller can directly be learnt the host information carrying in this protocol massages, and this host information specifically includes but not limited to one of following or combination in any: source MAC(Media Access Control, medium access control) address, VLAN(Virtual Local Area Network, VLAN) information, source IP address, IP protocol type, Ethernet protocol type etc.In addition,, owing to can carrying the host interface of receiving protocol massages on the network equipment in Packetin message, therefore, SDN controller can directly be received the host interface of protocol massages from this Packet in message learning network equipment.
Under the application scenarios shown in Fig. 1, SW1, after the protocol massages of receiving from RT1, sends Packet in message to SDN controller, carries the host interface (being interface 1) of receiving this protocol massages on protocol massages and SW1 in this Packet in message; SDN controller is after the Packet in message of receiving from SW1, identifying the message carrying in Packet in message is protocol massages, from the host information of protocol massages learning RT1, and receive that from Packet in message learning to RT1 the host interface of protocol massages is interface 1.SW2, after the protocol massages of receiving from RT2, sends Packet in message to SDN controller, carries the host interface (being interface 6) of receiving this protocol massages on protocol massages and SW2 in this Packet in message; SDN controller is after the Packet in message of receiving from SW2, identifying the message carrying in Packet in message is protocol massages, from the host information of protocol massages learning RT2, and receive that from Packet in message learning to RT2 the host interface of protocol massages is interface 6.SW3, after the protocol massages of receiving from RT3, sends Packet in message to SDN controller, carries the host interface (being interface 9) of receiving this protocol massages on protocol massages and SW3 in this Packet in message; SDN controller is after the Packet in message of receiving from SW3, identifying the message carrying in Packet in message is protocol massages, from the host information of protocol massages learning RT3, and receive that from Packet in message learning to RT3 the host interface of protocol massages is interface 9.
Step 203, SDN controller adds host interface (being the host interface that step 202 learning arrives) in port set corresponding to the network equipment, and sending the second Indication message to this network equipment, this second Indication message is used to indicate this network equipment and in the port set of self, adds this host interface; After receiving the second Indication message, in the port set of self, add this host interface by this network equipment.
Under the application scenarios shown in Fig. 1, when SW1 sends Packet in message to SDN controller, SDN controller is learnt interface 1(, and it is host interface), in the port set of SW1, add interface 1, and send to SW1 the second Indication message that is used to indicate SW1 and adds interface 1 in the port set of self; Based on this, SW1, after receiving the second Indication message, adds this interface 1 in the port set of self, now in the port set of SW1, comprises interface 3 and interface 1.When SW2 sends Packet in message to SDN controller, SDN controller is learnt interface 6(, and it is host interface), in the port set of SW2, add interface 6, and send to SW2 the second Indication message that is used to indicate SW2 and adds interface 6 in the port set of self; Based on this, SW2, after receiving the second Indication message, adds this interface 6 in the port set of self, now in the port set of SW2, comprises interface 4, interface 5 and interface 6.When SW3 sends Packet in message to SDN controller, SDN controller is learnt interface 9(, and it is host interface), in the port set of SW3, add interface 9, and send to SW3 the second Indication message that is used to indicate SW3 and adds interface 9 in the port set of self; Based on this, SW3, after receiving the second Indication message, adds this interface 9 in the port set of self, now in the port set of SW3, comprises interface 8 and interface 9.
Step 204, SDN controller issues stream table to multiple network equipments respectively, this stream table comprise host information (be step 202 learning to protocol massages in the host information that carries), and this stream table is used to indicate the network equipment in the time receiving the protocol massages that can mate this host information, utilize the exchange interface and/or the host interface that in the port set of present networks equipment self, record to send this protocol massages.
Under the application scenarios shown in Fig. 1, suppose to comprise interface 3 and interface 1 in the port set of SW1, in the port set of SW2, comprise interface 4, interface 5 and interface 6, in the port set of SW3, comprise interface 8 and interface 9.: for the protocol massages of RT1, SDN controller issues stream table to SW1, SW2 and SW3 respectively, in this stream table, will comprise the host information of RT1.Based on this, SW1 will receive the protocol massages of the host information that can mate RT1 by interface 1, and now SW1 can be other total interface outside the protocol massages receiving interface recording in port set by the interface 3(recording in port set) send this protocol massages.SW2 will receive the protocol massages of the host information that can mate RT1 by interface 5, now SW2 can be other total interface outside the protocol massages receiving interface recording in port set by the interface 4 and the interface 6(that record in port set) send this protocol massages.SW3 will receive the protocol massages of the host information that can mate RT1 by interface 8, now SW3 can be other total interface outside the protocol massages receiving interface recording in port set by the interface 9(recording in port set) send this protocol massages.
In the embodiment of the present invention, in order to ensure that the network equipment can priority treatment protocol massages, can also make the priority of protocol massages be better than the priority of data message.Based on this, SDN controller, in the time issuing stream table to the network equipment, can also comprise high-priority queue indication information in this stream table, and this high-priority queue indication information is used to indicate the protocol massages that the preferential transmission of the network equipment can be mated host information.
In the embodiment of the present invention, SDN controller, in the time issuing stream table to the network equipment, can also comprise ageing time in this stream table.Based on this, if the network equipment was received the protocol massages that can mate host information before ageing time is overtime, the network equipment upgrades the ageing time in stream table; If the network equipment is not all received the protocol massages that can mate host information in the time that ageing time is overtime, the network equipment is directly deleted this stream table.In specific implementation, what SDN controller was received sends interval from also carrying message in the protocol massages of the network equipment, therefore the ageing time that the stream table that SDN controller issues comprises need to be greater than the message carrying in protocol massages and send interval, and the message that is 3 times as ageing time sends interval.
In the embodiment of the present invention, when SDN controller is after each network equipment creates respectively the port set that each network equipment is corresponding, if current network topology changes, SDN controller also needs to delete port set corresponding to each network equipment difference, and send respectively the 3rd Indication message to each network equipment, and the 3rd Indication message is used to indicate the port set of each network equipment deletion self; After receiving the 3rd Indication message, on present networks equipment, delete the port set of self by each network equipment.Further, SDN controller also needs again to create respectively for each network equipment the port set that each network equipment is corresponding according to the network topology after changing, and the exchange interface of recording this network equipment in port set corresponding to the network equipment, and send the first Indication message to each network equipment respectively, by each network equipment after receiving this first Indication message, on present networks equipment, create the port set of self, and the exchange interface of the minute book network equipment in the port set of self.Wherein, current network topology changes and specifically includes but not limited to: the annexation between the network equipment changes, has the new network equipment to join SDN network, has the network equipment from SDN network, to remove etc.In addition, SDN controller is similar according to the processing in process and the above-mentioned steps 201 of the network topology after changing again maintenance port group, and at this, it is no longer repeated.
In the embodiment of the present invention, when SDN controller adds after host interface in port set corresponding to the network equipment, if the network equipment is not received and dispatched protocol massages by this host interface in Preset Time, fault or remove of All hosts that this network equipment connects is described, therefore SDN controller is deleted this host interface from port set corresponding to the network equipment, and send the 4th Indication message to this network equipment, and the 4th Indication message is used to indicate the network equipment and in the port set of self, deletes this host interface; After receiving the 4th Indication message, in the port set of self, delete described host interface by this network equipment.
Concrete, if the network equipment is not all received the protocol massages that can mate host information in the time that ageing time is overtime, the network equipment is directly deleted this stream table, now illustrate that this stream shows fault or remove of corresponding main frame, fault or remove of this main frame that network equipment connects by host interface.Further, if the network equipment does not connect other main frame by this host interface, fault or remove of All hosts that the network equipment connects by this host interface is described, SDN controller is deleted this host interface from the port set of this network equipment, and indicates this network equipment in the port set of self, to delete this host interface.If the network equipment is also connected with other main frame by this host interface, illustrate that the All hosts that the network equipment connects by this host interface does not have whole faults or removes, SDN controller need to not deleted this host interface from the port set of this network equipment, until the All hosts fault that connects by this host interface of this network equipment or remove, SDN controller is deleted this host interface from the port set of this network equipment, and indicates this network equipment in the port set of self, to delete this host interface.
In the said process of the embodiment of the present invention, protocol massages refers to multicast protocol message.Certain above-mentioned processing procedure is also applicable to unicast protocol message, there is following difference in the processing procedure of unicast protocol message and said process just: (1) SDN controller only need to issue stream table (this stream table comprises host information) to the network equipment, and do not need to indicate each network equipment maintenance port set, directly send protocol massages based on stream table by each network equipment.(2) host information that stream table comprises specifically includes but not limited to one of following or combination in any: source MAC, target MAC (Media Access Control) address, vlan information, source IP address, object IP address, IP protocol type, Ethernet protocol type etc.
In the said process of the embodiment of the present invention, protocol massages includes but not limited to the protocol massages based on ospf protocol, based on BGP(Border Gateway Protocol, Border Gateway Protocol) protocol massages of agreement, based on ISIS(Intermediate System to Intermediate System, Intermediate System-to-Intermediate System) protocol massages of agreement, based on PIM DM(Protocol Independent Multicast Dense Mode, independent multicast agreement-dense mode) protocol massages of agreement, based on PIM SM(Protocol Independent Multicast-Sparse Mode, independent multicast agreement-sparse mode) protocol massages of agreement.
In sum, in the embodiment of the present invention, SDN controller is by issuing stream table to the network equipment, so that the network equipment is in the time receiving corresponding protocol massages, can utilize the exchange interface and/or the host interface that in port set, record to send protocol massages, and not need protocol massages to send to SDN controller, thereby minimizing sends to the quantity of the protocol massages of SDN controller, improve the handling property of SDN controller, and saved the cpu resource of SDN controller; Owing to not needing that protocol massages is sent to SDN controller, therefore can avoid protocol massages by the congested service disconnection causing that abandons, improve the reliability transmitted of protocol massages in network, avoid protocol massages in the time of transmission by the congested packet loss that causes of common data message.
Based on the inventive concept same with said method, a kind of software defined network SDN controller is also provided in one embodiment of the invention, be applied in the network (as SDN network) that comprises described SDN controller and multiple network equipments, as shown in Figure 3, described SDN controller specifically comprises:
Logging modle 11, is used to each network equipment to create respectively the port set that each network equipment is corresponding, and the exchange interface of recording this network equipment in port set corresponding to the network equipment; And, sending the first Indication message to each network equipment respectively, described the first Indication message is used to indicate the port set of network equipment establishment self; Received after described the first Indication message by each network equipment, on present networks equipment, creating the port set of self, and the exchange interface of the minute book network equipment in the port set of self;
Study module 12, for when the protocol massages of receiving from the network equipment, learns to receive on the host information that carries in described protocol massages and the described network equipment host interface of described protocol massages;
Add module 13, for adding described host interface in port set corresponding to the described network equipment, and sending the second Indication message to the described network equipment, described the second Indication message is used to indicate the described network equipment and in the port set of self, adds described host interface; Receiving after described the second Indication message, in the port set of self, add described host interface by the described network equipment;
Issue module 14, for issuing stream table to described multiple network equipments respectively, and described stream table comprises the host information carrying in described protocol massages; Wherein, described stream table is used to indicate the network equipment in the time receiving the protocol massages of the host information carrying in can mating described protocol massages, utilizes the exchange interface and/or the host interface that in the port set of present networks equipment self, record to send described protocol massages.
Described logging modle 11, specifically for calculate broadcast tree according to current network topology, the exchange interface that comprises each network equipment in described broadcast tree, and exchange interface refers to the interface between the network equipment and the network equipment; And, utilize the exchange interface comprising in described broadcast tree in port set corresponding to the network equipment, to record the exchange interface of this network equipment in described broadcast tree.
Described study module 12, specifically for receiving the Packet in message from the described network equipment, and carry the protocol massages that the described network equipment is received in described Packet in message, and on the described network equipment, receive the host interface of described protocol massages, and host interface refers to the interface between the main frame outside the network equipment and described network; And, in the time identifying the message carrying in described Packet in message and be protocol massages, learn the host information that carries in described protocol massages, and receive the host interface of described protocol massages from the network equipment described in described Packet in message learning; Wherein, described host information specifically comprises one of following or combination in any: source medium access control MAC Address, virtual LAN VLAN information, source IP address, IP protocol type, Ethernet protocol type.
The described module 14 that issues, also in the time issuing stream table to the network equipment, makes stream table comprise ageing time and high-priority queue indication information; Described ageing time is greater than the message carrying in described protocol massages and sends interval, and described high-priority queue indication information is used to indicate the protocol massages that the preferential transmission of the network equipment can be mated described host information; If the network equipment was received the protocol massages that can mate described host information before ageing time is overtime, upgrade the ageing time of described stream table, if the network equipment is not received the protocol massages that can mate described host information in the time that ageing time is overtime, delete described stream table.
Described logging modle 11, also for after creating respectively for each network equipment the port set that each network equipment is corresponding, if current network topology changes, delete port set corresponding to each network equipment difference, and sending respectively the 3rd Indication message to each network equipment, described the 3rd Indication message is used to indicate the port set of each network equipment deletion self; Received after described the 3rd Indication message by each network equipment, on present networks equipment, deleting the port set of self; Again create respectively for each network equipment the port set that each network equipment is corresponding according to the network topology after changing, and the exchange interface of recording this network equipment in port set corresponding to the network equipment, and send the first Indication message to each network equipment respectively, received after described the first Indication message by each network equipment, on present networks equipment, create the port set of self, and the exchange interface of the minute book network equipment in the port set of self;
Described interpolation module 13, also for adding after host interface in port set corresponding to the network equipment, if the network equipment is not received and dispatched protocol massages by described host interface in Preset Time, from port set corresponding to the network equipment, delete described host interface, and sending the 4th Indication message to the described network equipment, described the 4th Indication message is used to indicate the network equipment and in the port set of self, deletes described host interface; Receiving after described the 4th Indication message, in the port set of self, delete described host interface by the described network equipment.
Wherein, the modules of apparatus of the present invention can be integrated in one, and also can separate deployment.Above-mentioned module can be merged into a module, also can further split into multiple submodules.
Through the above description of the embodiments, those skilled in the art can be well understood to the mode that the present invention can add essential general hardware platform by software and realize, and can certainly pass through hardware, but in a lot of situation, the former is better execution mode.Based on such understanding, the part that technical scheme of the present invention contributes to prior art in essence in other words can embody with the form of software product, this computer software product is stored in a storage medium, comprise that some instructions (can be personal computers in order to make a computer equipment, server, or the network equipment etc.) carry out the method described in each embodiment of the present invention.
It will be appreciated by those skilled in the art that accompanying drawing is the schematic diagram of a preferred embodiment, the module in accompanying drawing or flow process might not be that enforcement the present invention is necessary.
It will be appreciated by those skilled in the art that the module in the device in embodiment can be distributed in the device of embodiment according to embodiment description, also can carry out respective change and be arranged in the one or more devices that are different from the present embodiment.The module of above-described embodiment can be merged into a module, also can further split into multiple submodules.
The invention described above embodiment sequence number, just to describing, does not represent the quality of embodiment.
Disclosed is above only several specific embodiment of the present invention, and still, the present invention is not limited thereto, and the changes that any person skilled in the art can think of all should fall into protection scope of the present invention.
Claims (10)
1. a transmission method for protocol massages, the method is applied in the network that comprises software defined network SDN controller and multiple network equipments, it is characterized in that, said method comprising the steps of:
Described SDN controller is that each network equipment creates respectively the port set that each network equipment is corresponding, and the exchange interface of recording this network equipment in port set corresponding to the network equipment; And, sending the first Indication message to each network equipment respectively, described the first Indication message is used to indicate the port set of network equipment establishment self; Received after described the first Indication message by each network equipment, on present networks equipment, creating the port set of self, and the exchange interface of the minute book network equipment in the port set of self;
Described SDN controller, in the time of the protocol massages of receiving from the network equipment, learns to receive on the host information that carries in described protocol massages and the described network equipment host interface of described protocol massages;
Described SDN controller adds described host interface in port set corresponding to the described network equipment, and sending the second Indication message to the described network equipment, described the second Indication message is used to indicate the described network equipment and in the port set of self, adds described host interface; Receiving after described the second Indication message, in the port set of self, add described host interface by the described network equipment;
Described SDN controller issues stream table to described multiple network equipments respectively, and described stream table comprises the host information carrying in described protocol massages; Wherein, described stream table is used to indicate the network equipment in the time receiving the protocol massages of the host information carrying in can mating described protocol massages, utilizes the exchange interface and/or the host interface that in the port set of present networks equipment self, record to send described protocol massages.
2. the method for claim 1, is characterized in that, described SDN controller records the process of the exchange interface of this network equipment in port set corresponding to the network equipment, specifically comprises:
Described SDN controller calculates broadcast tree according to current network topology, the exchange interface that comprises each network equipment in described broadcast tree, and exchange interface refers to the interface between the network equipment and the network equipment;
Described SDN controller utilizes the exchange interface comprising in described broadcast tree in port set corresponding to the network equipment, to record the exchange interface of this network equipment in described broadcast tree.
3. the method for claim 1, is characterized in that, receives the host interface of protocol massages in described SDN controller study protocol massages on the host information carrying and the network equipment, specifically comprises:
Described SDN controller receives the Packet in message from the described network equipment, in described Packet in message, carry the protocol massages that the network equipment is received, and on the described network equipment, receive the host interface of described protocol massages, and host interface refers to the interface between the main frame outside the network equipment and described network;
Described SDN controller is in the time identifying the message carrying in described Packet in message and be protocol massages, learn the host information carrying in described protocol massages, and receive the host interface of described protocol massages from the network equipment described in described Packet in message learning; Wherein, described host information specifically comprises one of following or combination in any: source medium access control MAC Address, virtual LAN VLAN information, source IP address, IP protocol type, Ethernet protocol type.
4. the method for claim 1, is characterized in that, described method further comprises:
Described SDN controller, in the time issuing stream table to the network equipment, also comprises ageing time and high-priority queue indication information in described stream table; Described ageing time is greater than the message carrying in described protocol massages and sends interval, and described high-priority queue indication information is used to indicate the protocol massages that the preferential transmission of the network equipment can be mated described host information; If the network equipment was received the protocol massages that can mate described host information before ageing time is overtime, upgrade the ageing time of described stream table, if the network equipment is not received the protocol massages that can mate described host information in the time that ageing time is overtime, delete described stream table.
5. the method for claim 1, is characterized in that, described method further comprises:
After creating respectively for each network equipment the port set that each network equipment is corresponding, if current network topology changes, described SDN controller is deleted port set corresponding to each network equipment difference, and sending respectively the 3rd Indication message to each network equipment, described the 3rd Indication message is used to indicate the port set of each network equipment deletion self; Received after described the 3rd Indication message by each network equipment, on present networks equipment, deleting the port set of self; Described SDN controller creates respectively for each network equipment the port set that each network equipment is corresponding again according to the network topology after changing, and the exchange interface of recording this network equipment in port set corresponding to the network equipment, and send the first Indication message to each network equipment respectively, received after described the first Indication message by each network equipment, on present networks equipment, create the port set of self, and the exchange interface of the minute book network equipment in the port set of self;
In port set corresponding to the network equipment, add after host interface, if the network equipment is not received and dispatched protocol massages by described host interface in Preset Time, described SDN controller is deleted described host interface from port set corresponding to the network equipment, and sending the 4th Indication message to the described network equipment, described the 4th Indication message is used to indicate the network equipment and in the port set of self, deletes described host interface; Receiving after described the 4th Indication message, in the port set of self, delete described host interface by the described network equipment.
6. a software defined network SDN controller, is applied in the network that comprises described SDN controller and multiple network equipments, it is characterized in that, described SDN controller specifically comprises:
Logging modle, is used to each network equipment to create respectively the port set that each network equipment is corresponding, and the exchange interface of recording this network equipment in port set corresponding to the network equipment; And, sending the first Indication message to each network equipment respectively, described the first Indication message is used to indicate the port set of network equipment establishment self; Received after described the first Indication message by each network equipment, on present networks equipment, creating the port set of self, and the exchange interface of the minute book network equipment in the port set of self;
Study module, for when the protocol massages of receiving from the network equipment, learns to receive on the host information that carries in described protocol massages and the described network equipment host interface of described protocol massages;
Add module, for adding described host interface in port set corresponding to the described network equipment, and sending the second Indication message to the described network equipment, described the second Indication message is used to indicate the described network equipment and in the port set of self, adds described host interface; Receiving after described the second Indication message, in the port set of self, add described host interface by the described network equipment;
Issue module, for issuing stream table to described multiple network equipments respectively, and described stream table comprises the host information carrying in described protocol massages; Wherein, described stream table is used to indicate the network equipment in the time receiving the protocol massages of the host information carrying in can mating described protocol massages, utilizes the exchange interface and/or the host interface that in the port set of present networks equipment self, record to send described protocol massages.
7. SDN controller as claimed in claim 6, is characterized in that,
Described logging modle, specifically for calculate broadcast tree according to current network topology, the exchange interface that comprises each network equipment in described broadcast tree, and exchange interface refers to the interface between the network equipment and the network equipment; And, utilize the exchange interface comprising in described broadcast tree in port set corresponding to the network equipment, to record the exchange interface of this network equipment in described broadcast tree.
8. SDN controller as claimed in claim 6, is characterized in that,
Described study module, specifically for receiving the Packet in message from the described network equipment, and carry the protocol massages that the described network equipment is received in described Packet in message, and on the described network equipment, receive the host interface of described protocol massages, and host interface refers to the interface between the main frame outside the network equipment and described network; And, in the time identifying the message carrying in described Packet in message and be protocol massages, learn the host information that carries in described protocol massages, and receive the host interface of described protocol massages from the network equipment described in described Packet in message learning; Wherein, described host information specifically comprises one of following or combination in any: source medium access control MAC Address, virtual LAN VLAN information, source IP address, IP protocol type, Ethernet protocol type.
9. SDN controller as claimed in claim 6, is characterized in that,
The described module that issues, also in the time issuing stream table to the network equipment, makes also to comprise in stream table ageing time and high-priority queue indication information; Described ageing time is greater than the message carrying in described protocol massages and sends interval, and described high-priority queue indication information is used to indicate the protocol massages that the preferential transmission of the network equipment can be mated described host information; If the network equipment was received the protocol massages that can mate described host information before ageing time is overtime, upgrade the ageing time of described stream table, if the network equipment is not received the protocol massages that can mate described host information in the time that ageing time is overtime, delete described stream table.
10. SDN controller as claimed in claim 6, is characterized in that,
Described logging modle, also for after creating respectively for each network equipment the port set that each network equipment is corresponding, if current network topology changes, delete port set corresponding to each network equipment difference, and sending respectively the 3rd Indication message to each network equipment, described the 3rd Indication message is used to indicate the port set of each network equipment deletion self; Received after described the 3rd Indication message by each network equipment, on present networks equipment, deleting the port set of self; Again create respectively for each network equipment the port set that each network equipment is corresponding according to the network topology after changing, and the exchange interface of recording this network equipment in port set corresponding to the network equipment, and send the first Indication message to each network equipment respectively, received after described the first Indication message by each network equipment, on present networks equipment, create the port set of self, and the exchange interface of the minute book network equipment in the port set of self;
Described interpolation module, also for adding after host interface in port set corresponding to the network equipment, if the network equipment is not received and dispatched protocol massages by described host interface in Preset Time, from port set corresponding to the network equipment, delete described host interface, and sending the 4th Indication message to the described network equipment, described the 4th Indication message is used to indicate the network equipment and in the port set of self, deletes described host interface; Receiving after described the 4th Indication message, in the port set of self, delete described host interface by the described network equipment.
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