CN106453144B - Packet processing method and device in software-defined network - Google Patents

Abstract

Embodiments of the present invention provide a method and device for processing a packet in a software-defined network. The method includes: an SDN forwarding device determines that the input packet is a broadcast unknown unicast according to a classification flow table and a media access control MAC address of the input packet multicasting the BUM message; the SDN forwarding device uses the BUM message suppression flow table to match the input message, the BUM message suppression flow table includes at least one entry, and the entry includes a matching item and an operation instruction; the SDN The forwarding device processes the input packet according to the matching result. The above technical solutions can accurately control the BUM packets in the data flow, thereby improving network bandwidth and forwarding performance.

Description

Packet processing method and device in software-defined network

technical field

Embodiments of the present invention relate to the field of communications, and in particular, to a packet processing method and device in a software-defined network.

Background technique

Software Defined Network (English: Software Defined Network, referred to as "SDN") uses OpenFlow (English: OpenFlow) technology to convert the forwarding process that was completely controlled by switches/routers into SDN switches (English: SDN Switch) and controllers ( English: Controller) together to achieve the separation of data forwarding and routing control. SDN technology uses a multi-level flow table pipeline to complete the forwarding process of packets from input to output. However, at present, a large number of broadcast unknown unicast and multicast (English: Broadcast Unknown unicast and Multicast, "BUM") packets are duplicated and broadcast and sent in SDN, occupying network bandwidth and affecting network performance.

SUMMARY OF THE INVENTION

The embodiments of the present invention provide a packet processing method and device in a software-defined network, which can accurately control BUM packets in a data flow, and improve network bandwidth and forwarding performance.

In a first aspect, an embodiment of the present invention provides a packet processing method in a software-defined network SDN, including: the SDN forwarding device determines that the input packet is broadcast unknown according to the classification flow table and the media access control MAC address of the input packet Unicast multicast BUM message; the SDN forwarding device uses a BUM message suppression flow table to match the input message, and the BUM message suppression flow table includes at least one entry, and the entry includes a matching item and an operation instruction; The SDN forwarding device processes the input packet according to the matching result.

With reference to the first aspect, in a first possible implementation manner of the first aspect, determining by the SDN forwarding device to use the BUM packet suppression flow table to match the input packet includes: the SDN forwarding device according to the input packet , to check whether there is an entry matching the input packet in the BUM packet suppression flow table.

With reference to the first possible implementation manner of the first aspect, in the second possible implementation manner of the first aspect, the SDN forwarding device processes the input message according to the matching result, including: if the BUM message If there is no entry matching the input packet in the suppression flow table, the input packet is discarded; if there is a target entry matching the input packet in the BUM packet suppression flow table, according to the target table The operation instruction in the item processes the input message.

With reference to the first aspect, in a third possible implementation manner of the first aspect, the SDN forwarding device uses the BUM packet suppression flow table to match the input packet, including: the SDN forwarding device determining the BUM packet suppression The target entry in the flow table that matches the input message; the SDN forwarding device processes the input message according to the matching result, including: the SDN forwarding device reports the input message according to the operation instruction in the target entry text is processed.

With reference to the first aspect or any of the above possible implementation manners of the first aspect, in a fourth possible implementation manner of the first aspect, the matching item includes at least one of the following: an ingress interface, a destination MAC address, a source MAC address, destination IP address, source IP address, protocol type, user data protocol/transmission control protocol port number.

With reference to the first aspect or any of the above-mentioned possible implementations of the first aspect, in a fifth possible implementation of the first aspect, the SDN forwarding device performs media access control according to the classified flow table and the input message. Before the MAC address determines that the input message is a broadcast unknown unicast multicast BUM message, the method further includes: the SDN forwarding device receives the BUM message processing instruction sent by the SDN controller and executes the BUM message processing instruction. The packet processing instruction is used to instruct the SDN forwarding device to process the input packet according to the BUM packet suppression flow table under the condition that the input packet is determined to be a BUM packet according to the classified flow table.

In a second aspect, an embodiment of the present invention provides a packet processing method in a software-defined network SDN, including: an SDN controller determining a classification flow table; the SDN controller determining a broadcast unknown unicast multicast BUM packet suppression flow table, The BUM packet suppression flow table includes at least one entry, and the entry includes a matching item and an operation instruction; the SDN controller is further configured to generate a BUM packet processing instruction, and the BUM packet processing instruction is used to instruct the SDN forwarding device in If it is determined according to the classified flow table that the input message is a BUM message, the input message is processed according to the BUM message suppression flow table; the SDN controller uses the classified flow table, the BUM message suppression flow table and the BUM message The packet processing instruction is sent to the SDN forwarding device.

With reference to the second aspect, in a first possible implementation manner of the second aspect, the matching item of the BUM packet suppression flow table includes at least one of the following: ingress interface, destination MAC address, source MAC address, destination Internet Protocol IP address, source IP address, protocol type, user data protocol/transmission control protocol port number.

In a third aspect, an embodiment of the present invention provides a software-defined network SDN forwarding device, including: a receiving unit, configured to receive an input packet; and a first determining unit, configured to classify flow table and the input packet received by the receiving unit. the media access control MAC address of the message, to determine that the input message is a broadcast unknown unicast multicast BUM message; the second determination unit is configured to use the BUM message suppression flow table to match the input message, and the BUM message The message suppression flow table includes at least one entry, and the entry includes a matching item and an operation instruction; a third determining unit is configured to process the input message according to the matching result determined by the second determining unit.

With reference to the third aspect, in a first possible implementation manner of the third aspect, the second determining unit is specifically configured to, according to the input message, search whether there is a correlation with the input message in the BUM message suppression flow table matching entries.

In combination with the first possible implementation manner of the third aspect, in the second possible implementation manner of the third aspect, the third determining unit is specifically configured to be used if the BUM packet suppression flow table does not exist and the input If there is a target entry matching the input packet in the BUM packet suppression flow table, the input packet is reported according to the operation command in the target entry. text is processed.

With reference to the third aspect, in a third possible implementation manner of the third aspect, the second determining unit is specifically configured to determine a target entry in the BUM packet suppression flow table that matches the input packet; the The third determining unit is specifically configured to process the input message according to the operation instruction in the target entry.

With reference to the third aspect or any of the foregoing possible implementations of the third aspect, in a fourth possible implementation of the third aspect, the matching item of the BUM packet suppression flow table includes at least one of the following: Interface, destination MAC address, source MAC address, destination IP address, source IP address, protocol type, user data protocol/transmission control protocol port number.

With reference to the third aspect or any of the above possible implementations of the third aspect, in a fifth possible implementation of the third aspect, the receiving unit is further configured to receive a BUM packet processing instruction sent by the SDN controller ; The second determination unit and the third determination unit are also used to execute the BUM message processing instruction, and the BUM message processing instruction is used to instruct the first determination unit to determine that the input message is based on the classification flow table. In the case of a BUM packet, the input packet is processed according to the BUM packet suppression flow table

In a fourth aspect, an embodiment of the present invention provides a software-defined network SDN controller, including: a first determination unit configured to determine a classified flow table; a second determination unit configured to determine broadcast unknown unicast multicast BUM packet suppression a flow table, the BUM packet suppression flow table includes at least one entry, and the entry includes a matching item and an operation instruction; a third determining unit is used to generate a BUM packet processing instruction, and the BUM packet processing instruction is used to indicate the SDN When the forwarding device determines that the input message is a BUM message according to the classified flow table, the input message is processed according to the BUM message suppression flow table; the sending unit is used for the classified flow table determined by the first determining unit , the BUM packet suppression flow table determined by the second determining unit and the BUM packet processing instruction generated by the third determining unit are sent to the SDN forwarding device.

With reference to the fourth aspect, in a first possible implementation manner of the fourth aspect, the matching item of the BUM packet suppression flow table includes at least one of the following: ingress interface, destination MAC address, source MAC address, destination Internet Protocol IP address, source IP address, protocol type, user data protocol/transmission control protocol port number.

In the above technical solution, the SDN forwarding device can precisely control the BUM message by using the BUM message control flow table. Therefore, the above solution can avoid the reduction of network performance caused by the lack of fixed BUM control rules, thereby improving network bandwidth and forwarding performance.

Description of drawings

In order to illustrate the technical solutions of the embodiments of the present invention more clearly, the following briefly introduces the accompanying drawings that need to be used in the embodiments of the present invention. Obviously, the drawings described below are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can also be obtained from these drawings without any creative effort.

FIG. 1 is a schematic flowchart of a method for processing a packet in an SDN according to an embodiment of the present invention.

FIG. 2 is a schematic flowchart of a method for processing a packet in an SDN according to an embodiment of the present invention.

FIG. 3 is a structural block diagram of an SDN forwarding device provided according to an embodiment of the present invention.

FIG. 4 is a structural block diagram of an SDN controller provided according to an embodiment of the present invention.

FIG. 5 is a structural block diagram of an SDN forwarding device provided according to an embodiment of the present invention.

FIG. 6 is a structural block diagram of an SDN controller provided according to an embodiment of the present invention.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present invention.

FIG. 1 is a schematic flowchart of a method for processing a packet in an SDN according to an embodiment of the present invention. The method includes:

101. The SDN forwarding device determines that the input message is a BUM message according to the classification flow table and the media access control (English: Media Access Control, MAC for short) address of the input message.

102. The SDN forwarding device uses a BUM packet suppression flow table to match the input packet, where the BUM packet suppression flow table includes at least one entry, and the entry includes a matching item and an operation instruction.

103. The SDN forwarding device processes the input packet according to the matching result.

In the method shown in FIG. 1 , the SDN forwarding device can precisely control the BUM message by using the BUM message control flow table. Therefore, the above solution can avoid the reduction of network performance caused by the lack of fixed BUM control rules, thereby improving network bandwidth and forwarding performance.

Optionally, as an embodiment, determining by the SDN forwarding device to use the BUM packet suppression flow table to match the input packet includes: determining, by the SDN forwarding device, whether there is an entry in the BUM packet suppression flow table that matches the input packet. The target entry that matches this input packet. The SDN forwarding device processes the input message according to the matching result, including: if there is no target entry matching the input message in the entry of the BUM message suppression flow table, discarding the input message ; If there is a target entry matching the input packet in the entry of the BUM packet suppression flow table, the input packet can be processed according to the operation of the target entry.

Optionally, as another embodiment, determining by the SDN forwarding device to use the BUM packet suppression flow table to match the input packet includes: determining, by the SDN forwarding device, that an entry in the BUM packet suppression flow table matches the BUM packet suppression flow table. Enter the destination entry that matches the packet. The SDN forwarding device processes the input message according to the matching result, including: the SDN forwarding device processes the input message according to the operation instruction of the target entry.

For example, if the operation instruction of the target entry is discard, the input packet is discarded. If the operation instruction of the target entry is forwarding, the input packet is forwarded.

Specifically, the matching item in the BUM packet suppression flow table includes at least one of the following: input interface, destination MAC address, source MAC address, destination Internet Protocol (English: Internet Protocol, IP for short) address, source IP address, Protocol type, User Datagram Protocol (English: User Datagram Protocol, referred to as: UDP)/Transmission Control Protocol (English: Transmission Control Protocol, referred to as: TCP) port number.

Further, before the SDN forwarding device determines that the input message is a BUM message according to the classification flow table and the MAC address of the input message, the method further includes: the SDN forwarding device receives the BUM message processing instruction sent by the SDN controller and Execute the BUM packet processing instruction, where the BUM packet processing instruction is used to instruct the SDN forwarding device to process the input according to the BUM packet suppression flow table under the condition that the input packet is determined to be a BUM packet according to the classified flow table message.

Those skilled in the art can understand that the classified flow table and the BUM suppression flow table are determined by the SDN controller and sent to the SDN forwarding device. In the case of executing the BUM packet processing instruction, after receiving the classified flow table and the BUM suppression flow table sent by the SDN controller, the SDN forwarding device determines whether the input packet is a BUM packet according to the classified flow table, and determines whether the input packet is a BUM packet. If the message is a BUM message, the BUM message is processed according to the BUM suppression flow table. In addition, the SDN controller may also update the determined BUM suppression flow table and send the updated BUM suppression flow table to the SDN forwarding device. In this case, the SDN forwarding device may process the BUM message according to the updated BUM message suppression flow table.

FIG. 2 is a schematic flowchart of a method for providing a packet processing in an SDN according to an embodiment of the present invention. The method includes:

201. The SDN controller determines a classification flow table.

202. The SDN controller determines a BUM packet suppression flow table, where the BUM packet suppression flow table includes at least one entry, and the entry includes a matching item and an operation instruction.

203. The SDN controller generates a BUM packet processing instruction, where the BUM packet processing instruction is used to instruct the SDN forwarding device to suppress the flow table according to the BUM packet under the condition that the input packet is determined to be a BUM packet according to the classified flow table Process the incoming message.

204. The SDN controller sends the classified flow table, the BUM packet suppression flow table, and the BUM packet processing instruction to the SDN forwarding device.

According to the method shown in FIG. 2 , the SDN controller can determine the classified flow table and the BUM message suppression flow table, and send the classified flow table and the BUM message suppression flow table to the SDN forwarding device. In this way, when the SDN forwarding device executes the BUM packet processing instruction, after identifying the BUM packet using the classified flow table, the SDN forwarding device uses the BUM packet control flow table to precisely control the BUM packet. Therefore, the above solution can avoid the reduction of network performance caused by the lack of fixed BUM control rules, thereby improving network bandwidth and forwarding performance.

Specifically, the matching item of the BUM packet suppression flow table includes at least one of the following: input interface, destination MAC address, source MAC address, destination IP address, source IP address, protocol type, and UDP/TCP port number.

In order to help those skilled in the art better understand the present invention, the present invention will be further described below with reference to specific embodiments. It can be understood that, the specific embodiments are only for helping better understanding of the present invention, rather than limiting the present invention.

The SDN controller determines the classified flow table and sends the classified flow table to the SDN forwarding device, the classified flow table including the MAC address. In other words, the classified flow table can be used to distinguish BUM packets from non-BUM packets.

Optionally, as an embodiment, the SDN controller may set a packet whose destination MAC address of the input packet belongs to a specific destination MAC address as a BUM packet. That is, the MAC address information in the classified flow table includes the destination MAC address of the BUM packet. In this case, the SDN forwarding device can determine the destination MAC address of the input packet, and determine whether the destination MAC address belongs to the classified flow table. If the SDN forwarding device determines that the destination MAC address of the input message belongs to the classified flow table, it determines that the input message is a BUM message. If the SDN forwarding device determines that the destination MAC address of the input packet does not belong to the classified flow table, it determines that the input packet is a non-BUM packet.

Optionally, as another embodiment, the SDN controller may set a packet whose destination MAC address of the input packet belongs to a specific destination MAC address as a non-BUM packet. That is, the MAC address information in the classified flow table includes the destination MAC address of the non-BUM packet. In this case, the SDN forwarding device can determine the destination MAC address of the input packet, and determine whether the destination MAC address belongs to the classified flow table. If the SDN forwarding device determines that the destination MAC address of the input packet belongs to the classified flow table, it determines that the input packet is a non-BUM packet. If the SDN forwarding device determines that the destination MAC address of the input message does not belong to the classified flow table, it determines that the input message is a BUM message.

Optionally, as another embodiment, the SDN controller may set the input packet whose destination MAC address of the input packet belongs to the first MAC address set as a BUM packet, and the destination MAC address of the input packet belongs to the second MAC address set. The input packet is a non-BUM packet. That is, the MAC address information of the classified flow table includes two sets of MAC addresses, the first set of MAC addresses is the set of MAC addresses of BUM packets, and the second set of MAC addresses is the set of MAC addresses of non-BUM packets. In this case, the SDN forwarding device can determine the destination MAC address of the input packet, and determine which MAC address set in the classified flow table the destination MAC address belongs to. If the SDN forwarding device determines that the destination MAC address of the input packet belongs to the first MAC address set, it determines that the input packet is a BUM packet. If the SDN forwarding device determines that the destination MAC address of the input packet belongs to the second MAC address set, it determines that the input packet is a non-MUB packet.

Those skilled in the art can understand that the specific MAC address, the first MAC address set, and the MAC addresses in the second MAC address set in the above-mentioned embodiments may be determined complete MAC addresses; they may also be MAC addresses that conform to specific rules, such as MAC addresses. The first N items in the address are the MAC addresses of D8:96:83.

Those skilled in the art can understand that the SDN controller can not only set the classified flow table by setting the destination MAC address, but also set the classified flow table by setting the source MAC address, or set the destination MAC address and the source MAC address at the same time. Set the classification flow table by means of MAC address. The specific manner is similar to the manner of setting the destination MAC address, and it is unnecessary to describe it here.

The SDN controller may also determine the BUM packet suppression flow table and send the BUM packet suppression flow table to the SDN forwarding device.

The SDN controller may also generate a BUM packet processing instruction and send the BUM packet processing instruction to the SDN forwarding device. The BUM packet processing instruction is used to instruct the SDN forwarding device to process the input packet according to the BUM packet suppression flow table under the condition that the input packet is determined to be a BUM packet according to the classified flow table.

After receiving the BUM packet processing instruction, the SDN forwarding device executes the BUM packet processing instruction. In this case, when the SDN forwarding device determines that the input packet is a BUM packet by using the received classification flow table, it can determine to use the received BUM packet suppression flow table to match the input packet, And process the input message according to the matching result.

Optionally, as an embodiment, the SDN forwarding device may determine whether there is an entry matching the input packet in the entry of the BUM packet suppression flow table. Table 1 is a schematic diagram of a packet suppression flow table, wherein the matching items of the entries in the packet suppression flow table include a source MAC address, a destination MAC address, a source IP and a destination IP.

It can be understood that Table 1 is only a schematic representation of a BUM packet suppression flow table. In the packet suppression flow table, matching items can be set as required. The matching items can include at least one of the following: packet input interface, packet destination MAC address, packet source MAC address, packet destination IP address, packet source IP address address, packet protocol type, and UDP/TCP port number. In addition, it can be understood that the attributes of the input message to be determined are the same as the matching items in the table entry. For example, if the matching item in the table entry only includes the destination IP address, it is sufficient to determine the destination IP address of the input packet without determining other characteristics of the input packet, such as the destination MAC address.

Table 1

After determining that the input packet is a BUM packet, the SDN forwarding device may determine whether there is a target entry matching the characteristics of the input packet in the entries of the BUM packet suppression flow table. Taking Table 1 as an example, the instructions in the BUM packet suppression flow table may include forwarding and continue, where continue means continuing the subsequent Open Flow table lookup and matching process; forward means forwarding the input packet. If the SDN forwarding device determines that the feature of the input packet matches each matching item in an entry in the BUM packet suppression flow table, the operation instruction of the entry is executed; if the SDN forwarding device determines that the feature of the input message matches If there is a feature that does not match the matching item in the entry of the BUM packet suppression flow table, the input packet is discarded. For example, if the SDN forwarding device determines that incoming packet 1 is a BUM packet, and determines that the source MAC address of incoming packet 1 is MAC 1, the destination MAC address is MAC 2, the source IP address is IP3, and the destination IP address is IP7, then Execute the corresponding operation instruction, that is, continue the subsequent Open Flow lookup table matching process. If the SDN forwarding device determines that the input packet 2 is a BUM packet, and determines that the source MAC address of the input packet 2 is MAC 3, the destination MAC address is MAC 5, the source IP is IP 7, and the destination IP address is IP 9, execute The corresponding operation command is to forward the input packet 2 to the device whose MAC address is MAC 5 and whose IP address is IP 9. If the SDN forwarding device determines that the incoming packet 3 is a BUM packet, and determines that the source MAC address of the incoming packet 3 is MAC 10, the destination MAC address is MAC 5, the source IP address is IP 7, and the destination IP address is IP 9. It can be seen that there are no exact matches in Table 1. In this case, the SDN forwarding device may discard the incoming packet 3.

It can be seen from the above embodiment that if a target entry that completely matches the input packet can be found from the BUM packet suppression flow table, the instruction corresponding to the target matching item can be executed; the BUM packet suppression flow table cannot be If an exact match is found, the input packet is discarded.

Optionally, as another embodiment, the instructions in the BUM packet suppression flow table may include: forwarding, continuing, and discarding. That is to say, if the SDN forwarding device determines that the feature of the input packet matches the entry in the BUM packet suppression flow table whose operation instruction is discard, the input packet may be discarded. In addition, if the SDN forwarding device determines that the characteristics of the input packet do not match any entry in the packet suppression flow table, the SDN forwarding device may discard the input packet.

Optionally, as another embodiment, the SDN forwarding device may further determine a target entry in the BUM packet suppression flow table that matches the input packet. Table 2 is a schematic diagram of another BUM packet suppression flow table. The matching items of the entry in the packet suppression flow table include source MAC address, destination MAC address, source IP and destination IP.

It can be understood that, similar to Table 1, Table 2 is only a schematic representation of a BUM packet suppression flow table. In the packet suppression flow table, matching items can be set as required. The matching items can include at least one of the following: packet input interface, packet destination MAC address, packet source MAC address, packet destination IP address, packet source IP address address, packet protocol type, and UDP/TCP port number. In addition, it can be understood that the attributes of the input message to be determined are the same as the matching items in the table entry. For example, if the matching item in the table entry only includes the destination IP address, it is sufficient to determine the destination IP address of the input packet without determining other characteristics of the input packet, such as the destination MAC address.

Table 2

"**" in Table 2 indicates that this item can be any value. After determining that the input packet is a BUM packet, the SDN forwarding device may determine a target entry in the BUM packet suppression flow table that matches the characteristics of the input packet, and perform operations according to the target entry. The instruction processes the input message. In the embodiment shown in Table 2, the instructions in the BUM packet suppression flow table may include forwarding, continuing and discarding, where continuing means continuing the subsequent Open Flow table lookup and matching process; forwarding means forwarding the input packet; discarding means The incoming message is discarded.

In this embodiment, a specific entry exists in the BUM packet suppression flow table, and the values of the matching items in the specific entry are all arbitrary values. For example, the entry with the serial number 6 shown in Table 2 is the specific entry. This particular entry has the lowest priority. In this case, if the SDN forwarding device determines that the input packet matches any entry except the specific entry, any entry other than the specific entry is the target entry, and the target entry is executed. operation instructions. However, if any input packet does not match other entries, the specific entry can be finally matched, and the input packet is discarded. In other words, the priority is to determine whether the BUM packet matches an entry other than the specific entry. If there is no other matching entry, it will eventually match the specific entry. For example, if the SDN forwarding device determines that incoming packet 1 is a BUM packet, and determines that the source MAC address of incoming packet 1 is MAC 1, the destination MAC address is MAC 2, the source IP address is IP3, and the destination IP address is IP7, then It can be determined that the input message 1 matches the entry with the sequence number 3, and the operation instruction with the sequence number 3 is executed, that is, the subsequent Open Flow table lookup and matching process is continued. In this case, the entry with the sequence number 3 is the target entry of the input message 1. If the SDN forwarding device determines that the input packet 2 is a BUM packet, and determines that the source MAC address of the input packet 2 is MAC 3, the destination MAC address is MAC 5, the source IP is IP 7, and the destination IP address is IP 9, then determine The input packet 2 matches the entry with the sequence number 4, and the operation command with the sequence number 4 is executed, that is, the input packet 2 is forwarded to the device whose MAC address is MAC 5 and whose IP address is IP9. . In this case, the entry with the sequence number 4 is the target entry of the input message 1. If the SDN forwarding device determines that the input packet 3 is a BUM packet, and determines that the source MAC address of the input packet 3 is MAC 7, the destination MAC address is MAC 5, the source IP is IP 7, and the destination IP address is IP 9. It can be seen that, except for the specific entry in Table 2, there is no entry matching the input packet 3. The target entry of the input message 3 is the specific entry. In this case, the corresponding operation instruction is executed, that is, the input message 3 is discarded.

Those skilled in the art can understand that the SDN forwarding device can first determine whether all entries in the BUM packet suppression flow table except the specific entry have entries that match the input If the entry matches the input packet, the matching process is stopped, and the matching entry is determined to be the target entry matching the input packet. The SDN forwarding device may also determine the target entry of the input packet according to the priority of the entry. In the BUM packet suppression flow table, the specific entry has the lowest priority. In this case, the SDN forwarding device can definitely determine that the specific entry is an entry matching the input message. However, the SDN forwarding device also needs to determine whether there are other entries other than the specific entry that match the input packet. If it exists, because the priority of the entry other than the specific entry is higher than the specific entry, the SDN forwarding device will determine that the matched entry except the specific entry is the target entry of the input packet . If it does not exist, the SDN forwarding device determines that the specific entry is the target entry of the input message.

Those skilled in the art can understand that the specific content of the classified flow table and the BUM suppressed flow table can be set by the administrator, and the specific content of the classified flow table and the BUM suppressed flow table can be modified as required.

FIG. 3 is a structural block diagram of an SDN forwarding device provided according to an embodiment of the present invention, which is used to implement the packet processing method in the SDN shown in FIG. 1 of the present invention. As shown in FIG. 3 , the SDN forwarding device 300 includes a receiving unit 301 , a first determining unit 302 , a second determining unit 303 and a third determining unit 304 .

The receiving unit 301 is used for receiving an input message.

The first determining unit 302 is configured to determine that the input message is a broadcast unknown unicast multicast BUM message according to the classification flow table and the MAC address of the input message received by the receiving unit 301 .

The second determining unit 303 is configured to match the input packet by using a BUM packet suppression flow table, where the BUM packet suppression flow table includes at least one entry, and the entry includes a matching item and an operation instruction.

The third determining unit 304 is configured to process the input message according to the matching result determined by the second determining unit 303 .

The SDN forwarding device 300 shown in FIG. 3 can precisely control the BUM message by using the BUM message control flow table. Therefore, the above solution can avoid the reduction of network performance caused by the lack of fixed BUM control rules, thereby improving network bandwidth and forwarding performance.

Optionally, as an embodiment, the second determining unit 303 is specifically configured to search, according to the input message, whether there is an entry matching the input message in the BUM message suppression flow table. The third determining unit 304 is specifically configured to discard the input packet if there is no entry matching the input packet in the BUM packet suppression flow table; if there is an entry matching the input packet in the BUM packet suppression flow table The target entry that matches the input message is processed, and the input message is processed according to the operation instruction in the target entry.

Optionally, as another embodiment, the second determining unit 303 is specifically configured to determine the target entry in the BUM packet suppression flow table that matches the input packet; the third determining unit 304 is specifically configured to determine according to the The operation instruction in the target entry processes the input message.

Specifically, the matching items in the BUM packet suppression flow table include at least one of the following: ingress interface, destination MAC address, source MAC address, destination Internet Protocol IP address, source IP address, protocol type, user data protocol/transmission control The port number of the protocol.

Further, the receiving unit 301 is further configured to receive the BUM packet processing instruction sent by the SDN controller; the second determining unit 303 and the third determining unit 304 are further configured to execute the BUM packet processing instruction, the BUM packet processing instruction is used to instruct the first determination unit to process the input message according to the BUM message suppression flow table under the condition that the input message is determined to be a BUM message according to the classified flow table

In addition, those skilled in the art can understand that the receiving unit 301 may also be configured to receive the classified flow table and the BUM packet suppression flow table sent by the SDN controller. Meanwhile, the receiving unit 301 may also be configured to receive the updated BUM packet suppression flow table sent by the SDN controller.

FIG. 4 is a structural block diagram of an SDN controller provided according to an embodiment of the present invention, which is used to implement the packet processing method in the SDN shown in FIG. 2 of the present invention. As shown in FIG. 4 , the SDN controller 400 includes a first determining unit 401 , a second determining unit 402 , a third determining unit 403 and a sending unit 404 .

The first determining unit 401 is configured to determine the classification flow table.

The second determining unit 402 is configured to determine a broadcast-unknown unicast-multicast BUM message suppression flow table, where the BUM message suppression flow table includes at least one entry, and the entry includes a matching item and an operation instruction.

The third determining unit 403 is configured to generate a BUM packet processing instruction, where the BUM packet processing instruction is used to instruct the SDN forwarding device to suppress the BUM packet according to the BUM packet when the input packet is determined to be a BUM packet according to the classification flow table The flow table processes the incoming message.

The sending unit 404 is configured to send the classified flow table determined by the first determining unit 401, the BUM packet suppression flow table determined by the second determining unit 402, and the BUM packet processing instruction generated by the third determining unit 403 to the SDN forwarding device.

The SDN controller 400 shown in FIG. 4 can determine the classified flow table and the BUM message suppression flow table, and send the classified flow table and the BUM message suppression flow table to the SDN forwarding device. In this way, the SDN forwarding device can identify the BUM packet by using the classified flow table, and accurately control the BUM packet by using the BUM packet control flow table. Therefore, the above solution can avoid the reduction of network performance caused by the lack of fixed BUM control rules, thereby improving network bandwidth and forwarding performance.

Specifically, the matching items in the BUM packet suppression flow table include at least one of the following: ingress interface, destination MAC address, source MAC address, destination Internet Protocol IP address, source IP address, protocol type, user data protocol/transmission control The port number of the protocol.

FIG. 5 is a structural block diagram of an SDN forwarding device provided according to an embodiment of the present invention, which is used to implement the packet processing method in the SDN shown in FIG. 1 of the present invention. As shown in FIG. 5 , the SDN forwarding device 500 includes a processor 501 , a memory 502 and a communication interface 503 .

The processor 501, the memory 502 and the communication interface 503 are connected to each other through a bus system 504, wherein the bus system 504 includes a power bus, a control bus and a status signal bus in addition to a data bus. For clarity, however, the various buses are labeled as bus system 504 in FIG. 5 .

The aforementioned processor 501 may be a general-purpose processor, a digital signal processor (Digital Signal Processor, DSP), an application specific integrated circuit (Application Specific Integrated Circuit, ASIC), a field programmable gate array (Field Programmable Gate Array, FPGA), or other available Programming logic devices, discrete gate or transistor logic devices, discrete hardware components.

The memory 502 is used for storing programs. Specifically, the program may include program code, and the program code includes computer operation instructions. The memory 502 may include random access memory (random access memory, RAM for short), and may also include non-volatile memory (non-volatile memory), such as at least one disk storage.

The processor 501 executes the program stored in the memory 502 for receiving the input message through the communication interface 503; according to the classification flow table and the MAC address of the input message, it is determined that the input message is a BUM message; Matching the input message by using a BUM message suppression flow table, where the BUM message suppression flow table includes at least one entry, the entry including a matching item and an operation instruction; and processing the input message according to the matching result.

The SDN forwarding device 500 shown in FIG. 5 can precisely control the BUM message by using the BUM message suppression flow table. Therefore, the above solution can avoid the reduction of network performance caused by the lack of fixed BUM control rules, thereby improving network bandwidth and forwarding performance.

The processor 501 can be specifically configured to, according to the input message, look up whether there is an entry matching the input message in the BUM message suppression flow table, if there is no entry matching the input message in the BUM message suppression flow table. If there is a target entry matching the input packet in the BUM packet suppression flow table, the input packet will be discarded according to the operation instruction in the target entry. to be processed.

The processor 501 may also be specifically configured to determine a target entry in the BUM packet suppression flow table that matches the input packet; and process the input packet according to an operation instruction in the target entry.

Specifically, the matching items in the BUM packet suppression flow table include at least one of the following: ingress interface, destination MAC address, source MAC address, destination Internet Protocol IP address, source IP address, protocol type, user data protocol/transmission control The port number of the protocol.

Further, the processor 501 further receives the BUM packet processing instruction sent by the SDN controller through the communication interface 503; executes the BUM packet processing instruction, and the BUM packet processing instruction is used to instruct the first determining unit to When it is determined according to the classified flow table that the input message is a BUM message, the input message is processed according to the BUM message suppression flow table.

In addition, those skilled in the art can understand that the processor 501 can also receive, through the communication interface 503, the classified flow table and the BUM packet suppression flow table sent by the SDN controller.

The memory 502 is further configured to store the classified flow table and the BUM packet suppression flow table.

The processor 501 may also be configured to receive the updated BUM packet suppression flow table sent by the SDN controller, and update the BUM packet suppression flow table stored in the memory 502 .

FIG. 6 is a structural block diagram of an SDN controller provided according to an embodiment of the present invention, which is used to implement the packet processing method in the SDN shown in FIG. 2 of the present invention. As shown in FIG. 6 , the SDN controller 600 includes a processor 601 , a memory 602 and a communication interface 603 .

The processor 601, the memory 602 and the communication interface 603 are connected to each other through a bus system 604, wherein the bus system 604 includes a power bus, a control bus and a status signal bus in addition to a data bus. However, for clarity of illustration, the various buses are labeled as bus system 604 in FIG. 6 .

The above-mentioned processor 601 may be a general-purpose processor, a digital signal processor (Digital Signal Processor, DSP for short), an application specific integrated circuit (ASIC for short), and a Field Programmable Gate Array (Field Programmable Gate Array for short, FPGA for short) Or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components. The memory 602 is used to store programs. Specifically, the program may include program code, and the program code includes computer operation instructions. Memory 602 may include RAM and may also include non-volatile memory, such as at least one disk storage.

The processor 601 executes the program stored in the memory 602 to determine a classified flow table; determines a broadcast unknown unicast multicast BUM message suppression flow table, where the BUM message suppression flow table includes at least one entry, The table entry includes a matching item and an operation instruction; a BUM packet processing instruction is generated, and the BUM packet processing instruction is used to instruct the SDN forwarding device to use the BUM packet according to the classification flow table when determining that the input packet is a BUM packet. The incoming message is processed by the message suppression flow table; the classified flow table and the BUM message suppression flow table are sent to the SDN forwarding device through the communication interface 603 .

The SDN controller 600 shown in FIG. 6 can determine the classified flow table and the BUM message suppression flow table, and send the classified flow table and the BUM message suppression flow table to the SDN forwarding device. In this way, the SDN forwarding device can identify the BUM packet by using the classified flow table, and accurately control the BUM packet by using the BUM packet control flow table. Therefore, the above solution can avoid the reduction of network performance caused by the lack of fixed BUM control rules, thereby improving network bandwidth and forwarding performance.

Specifically, the matching items in the BUM packet suppression flow table include at least one of the following: ingress interface, destination MAC address, source MAC address, destination Internet Protocol IP address, source IP address, protocol type, user data protocol/transmission control The port number of the protocol.

The processor 601 is further configured to send the updated BUM packet suppression flow table to the SDN forwarding device through the communication interface 603 .

Those of ordinary skill in the art can realize that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Skilled artisans may implement the described functionality using different methods for each particular application, but such implementations should not be considered beyond the scope of the present invention.

Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working process of the above-described systems, devices and units may refer to the corresponding processes in the foregoing method embodiments, which will not be repeated here.

In the several embodiments provided in this application, it should be understood that the disclosed system, apparatus and method may be implemented in other manners. For example, the apparatus embodiments described above are only illustrative. For example, the division of the units is only a logical function division. In actual implementation, there may be other division methods. For example, multiple units or components may be combined or Can be integrated into another system, or some features can be ignored, or not implemented. On the other hand, the shown or discussed mutual coupling or direct coupling or communication connection may be through some interfaces, indirect coupling or communication connection of devices or units, and may be in electrical, mechanical or other forms.

The units described as separate components may or may not be physically separated, and components displayed as units may or may not be physical units, that is, may be located in one place, or may be distributed to multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution in this embodiment.

In addition, each functional unit in each embodiment of the present invention may be integrated into one processing unit, or each unit may exist physically alone, or two or more units may be integrated into one unit.

The functions, if implemented in the form of software functional units and sold or used as independent products, may be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention can be embodied in the form of a software product in essence, or the part that contributes to the prior art or the part of the technical solution. The computer software product is stored in a storage medium, including Several instructions are used to cause a computer device (which may be a personal computer, a server, or a network device, etc.) or a processor to execute all or part of the steps of the methods described in various embodiments of the present invention. The aforementioned storage medium includes: a USB flash drive, a removable hard disk, a read-only memory (Read-Only Memory, ROM for short), a RAM, a magnetic disk or an optical disk and other media that can store program codes.

The above are only specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art who is familiar with the technical scope disclosed by the present invention can easily think of changes or substitutions. All should be covered within the protection scope of the present invention, so the protection scope of the present invention should be subject to the protection scope of the claims.

Claims (14)

1, A message processing method in SDN, comprising:

the SDN forwarding equipment determines that the input message is broadcast unknown unicast and multicast BUM message according to the classification flow table and the Media Access Control (MAC) address of the input message;

the SDN forwarding device matches the input message by using a BUM message suppression flow table, wherein the BUM message suppression flow table comprises at least table entries, and each table entry comprises a matching entry and an operation instruction;

and the SDN forwarding equipment processes the input message according to a matching result.

2. The method of claim 1, wherein the SDN forwarding device determining to match the incoming packet using a BUM packet throttling flow table comprises:

and the SDN forwarding equipment searches whether an entry matched with the input message exists in the BUM message suppression flow table or not according to the input message.

3. The method of claim 2, wherein the SDN forwarding device processes the incoming packet according to the matching result, comprising:

if the BUM message suppression flow table does not have the table entry matched with the input message, discarding the input message; and if a target table item matched with the input message exists in the BUM message suppression flow table, processing the input message according to an operation instruction in the target table item.

4. The method of claim 1,

the SDN forwarding device uses a BUM message suppression flow table to match the input message, and the method comprises the following steps:

the SDN forwarding equipment determines a target table entry matched with the input message in the BUM message suppression flow table;

the SDN forwarding device processes the input message according to the matching result, and the processing comprises:

and the SDN forwarding equipment processes the input message according to the operation instruction in the target table entry.

5. The method of any of claims 1-4, wherein before the SDN forwarding device determines an incoming packet is a -cast unknown unicast-multicast BUM packet based on a classification flow table and a Media Access Control (MAC) address of the incoming packet, the method further comprises:

the SDN forwarding device receives a BUM message processing instruction sent by an SDN controller and executes the BUM message processing instruction, wherein the BUM message processing instruction is used for instructing the SDN forwarding device to process the input message according to the BUM message suppression flow table under the condition that the input message is determined to be the BUM message according to the classification flow table.

6, A message processing method in SDN, comprising:

the SDN controller determines a classification flow table;

the SDN controller determines to broadcast an unknown unicast and multicast BUM message suppression flow table, wherein the BUM message suppression flow table comprises at least table entries, and the table entries comprise matching entries and operation instructions;

the SDN controller generates a BUM message processing instruction, wherein the BUM message processing instruction is used for instructing SDN forwarding equipment to inhibit a flow table to process an input message according to the BUM message under the condition that the input message is determined to be the BUM message according to the classification flow table;

and the SDN controller sends the classification flow table, the BUM message suppression flow table and the BUM message processing instruction to the SDN forwarding equipment.

7. The method of claim 6, wherein the matching entries of the BUM packet suppression flow table comprise at least of an incoming interface, a destination MAC address, a source MAC address, a destination Internet protocol IP address, a source IP address, a protocol type, a port number of a user data protocol/transport control protocol.

8, Software Defined Network (SDN) forwarding equipment, comprising:

a receiving unit, configured to receive an input message;

an determining unit, configured to determine, according to the classified flow table and the MAC address of the incoming packet received by the receiving unit, that the incoming packet is a broadcast unknown unicast and multicast BUM packet;

a second determining unit, configured to match the input packet using a BUM packet suppression flow table, where the BUM packet suppression flow table includes at least entries, and the entry includes a matching entry and an operation instruction;

and the third determining unit is used for processing the input message according to the matching result determined by the second determining unit.

9. The SDN forwarding device of claim 8, wherein the second determining unit is specifically configured to search, according to the input packet, whether an entry matching the input packet exists in the BUM packet suppression flow table.

10. The SDN forwarding device of claim 9, wherein the third determining unit is specifically configured to discard the incoming packet if no entry matching the incoming packet exists in the BUM packet suppression flow table; and if a target table item matched with the input message exists in the BUM message suppression flow table, processing the input message according to an operation instruction in the target table item.

11. The SDN forwarding device of claim 8, wherein the second determining unit is specifically configured to determine a target entry in the BUM packet suppression flow table that matches the input packet;

the third determining unit is specifically configured to process the input packet according to the operation instruction in the target entry.

12. The SDN forwarding device of any of claims 8 through 11, wherein the receiving unit is further configured to receive BUM packet processing instructions sent by an SDN controller;

the second determining unit and the third determining unit are further configured to execute the BUM packet processing instruction, where the BUM packet processing instruction is used to instruct the determining unit to process the input packet according to the BUM packet suppression flow table when the input packet is determined to be a BUM packet according to the classification flow table.

An SDN controller of , comprising:

an th determination unit for determining a classification flow table;

a second determining unit, configured to determine to broadcast an unknown unicast and multicast BUM packet suppression flow table, where the BUM packet suppression flow table includes at least entries, and the entries include matching entries and operation instructions;

a third determining unit, configured to generate a BUM packet processing instruction, where the BUM packet processing instruction is used to instruct an SDN forwarding device to, when determining that an input packet is a BUM packet according to the classification flow table, suppress the flow table according to the BUM packet to process the input packet;

a sending unit, configured to send the classification flow table determined by the -th determining unit, the BUM packet suppression flow table determined by the second determining unit, and the BUM packet processing instruction generated by the third determining unit to an SDN forwarding device.

14. The SDN controller of claim 13, wherein the match of the BUM packet suppression flow table includes at least of an ingress interface, a destination MAC address, a source MAC address, a destination internet protocol IP address, a source IP address, a protocol type, a port number of a user data protocol/transmission control protocol.

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