WO2017067408A1 - Methods for sending and receiving messages, and network equipment - Google Patents

Abstract

Methods for sending and receiving messages, and network equipment, which are used for resolving the technical problem of comparatively rough granularity caused during a performance test of a network. The method for sending messages comprises: first network equipment receives a first message; the first network equipment encapsulates a virtual extensible local area network (VXLAN) header and an outer Internet protocol (IP) header outside the first message to obtain a second message, a reserved bit in the VXLAN header being set to be a first tag value, the first tag value being used for indicating that the time, when the first network equipment sends the second message, is within a first time period, and the first time period being one of a plurality of statistic time periods in which the first network equipment performs statistics on the message number of a service flow where the second message is located; and the first network equipment sends the second message.

Description

Message sending and receiving method and network device

This application claims priority to Chinese Patent Application No. 20151068262, filed on October 20, 2015, entitled "A Message Transmission, Receiving Method, and Network Equipment", the entire contents of which are incorporated by reference. In this application.

Technical field

The present application relates to the field of communications, and in particular, to a packet sending and receiving method and a network device.

Background technique

Virtual Extensible local area network (VXLAN) is a coverage (English: overlay) network technology that can be used to improve the scalability of large cloud computing deployments. VXLAN technology uses a virtual local area network (VLAN) encapsulation technology in the open system interconnection (English: Open Systems Interconnection, OSI) 4 layer user datagram protocol (English: User Datagram Protocol, UDP) A Layer 2 Ethernet frame based on media access control (MAC) is encapsulated in the message with a specific destination UDP port number.

VXLAN has the following features:

24-bit VXLAN Network Identifier (VNI), which can be used to indicate the independent VXLAN overlay network where virtual machines (VMs) in the communication system are located, located in different VXLAN overlay networks. Unable to communicate between virtual machines.

In a VXLAN network, individual tenants can use their own services independently. During the use of the service, testing of network performance may be involved to determine how to use the service based on the performance of the current network.

Currently, when testing network performance, only the physical network can be tested. However, for each tenant, the respective network conditions may be the same. It can be seen that the performance test of the physical network is coarser, and the obtained test result is not accurate enough.

Summary of the invention

The present application provides a packet sending and receiving method and a network device, which are used to solve the technical problem that the granularity is relatively large when performing performance testing on the network.

The first aspect provides a packet sending method, including:

Receiving, by the first network device, the first packet;

The first network device encapsulates the VXLAN header and the outer IP header in the first packet to obtain a second packet, where the reserved bit in the VXLAN header is set to the first label value. The first flag value is used to indicate that the time that the first network device sends the second packet is in a first time period, where the first time period is that the first network device collects a service flow of the second packet One of a plurality of statistical periods of the number of messages;

The first network device sends the second packet.

The reserved bit in the VXLAN header is set to indicate which statistical period the time at which the second message is sent is located, so that the message can be distinguished according to the reserved bits in the VXLAN header of the message. When performing network performance measurement, you can test the performance of the VXLAN network in different statistical periods, instead of only testing the physical network, and refine the test granularity of network performance.

In conjunction with the first aspect, in a first possible implementation of the first aspect, the method further includes:

Determining, by the first network device, the number of packets in the service flow in which the second packet is sent in the first time period;

The first network device sends the determined number of sent packets to the control device.

The number of the packets of the service flow in which the second packet is sent in the first time period may be counted, and the number of the packets of the service flow in the first time period may be counted. The statistically obtained quantity is sent to the control device. In addition, the network device that receives the packet of the service flow in which the second packet is located may also send the number of the service packet of the service packet that is received in the first time period to the control device, so that the control device can calculate The number of lost packets in the first time period of the service flow in which the second packet is located is obtained.

In conjunction with the first aspect or the first possible implementation of the first aspect, in a second possible implementation of the first aspect, the method further includes:

Receiving, by the first network device, a third packet sent by the second network device, where the reserved bit in the VXLAN header of the third packet is set to a second tag value;

Determining, by the first network device, that the time that the second network device sends the third packet is in a second time period according to the second tag value in the VXLAN header of the third packet, where the second time period is And counting, by the first network device, one of a plurality of statistical periods of the number of packets of the service flow in which the third packet is located.

For one service flow, the first network device may be the source device, and for another service flow, the first network device may also be the destination device. When the first network device is the destination device, it can receive the packets sent by the other source devices. The first network device may also have measurement packets in the packets. The first network device determines the reserved bits in the VXLAN header of the received packet. Whether it is marked or not can determine which messages are measurement messages, that is, the measurement message is marked, otherwise it is an ordinary message.

In conjunction with the second possible implementation of the first aspect, in a third possible implementation of the first aspect, the method further includes:

Determining, by the first network device, the number of packets in the service flow of the third packet received in the second time period;

The first network device sends the determined number of received messages to the control device.

When the first network device is used as the destination device, the service flow of the third packet received in the second time period may be counted from the packet that receives the service flow of the first third packet, and has a third The number of packets marked with the same packet, so that the first network device can send the statistics to the control device. Similarly, the network device that sends the packet of the service flow where the third packet is located can also be used. The number of packets of the service flow in which the third packet is sent in a period of time is sent to the control device, so that the control device can calculate the number of packets lost in the second period of the service flow in which the third packet is located.

The second aspect provides a packet receiving method, including:

Receiving, by the first network device, a third packet sent by the second network device, where the reserved bit in the VXLAN header of the third packet is set to a second tag value;

If the third packet is the first packet with the second tag value received by the first network device, the first network device determines the second network according to the second tag value. The time period in which the device sends the third packet is in a second time period; the second time period is one of a plurality of statistical periods in which the first network device collects the number of packets of the service flow in which the third packet is located;

The first network device starts timing to receive the third packet, to count the number of packets in the service flow of the third packet received in the second time period.

The first network device can determine which messages are measurement messages by determining whether the reserved bits in the VXLAN header of the received message are marked, that is, the measurement message is marked, otherwise it is an ordinary message. If the third packet is the first packet with the second tag value received by the first network device, the first network device determines that the second network device sends the third packet according to the second tag value. In addition to the time period, the device may start counting from the third packet to collect the number of packets in the service flow of the third packet received in the second time period, so that the control device can obtain the service where the third packet is located. The number of lost packets in the second time period.

With reference to the second aspect, in a first possible implementation manner of the second aspect, after the first network device starts timing to receive the third packet, the method further includes:

Receiving, by the first network device, a fourth packet sent by the second network device;

Determining, by the first network device, that a reserved bit in the VXLAN header of the fourth packet is set to the second tag value according to a VXLAN header of the fourth packet;

The first network device adds 1 to the number of packets in the service flow in which the third packet is received in the second time period.

In this implementation manner, a method for collecting the number of statistics packets is provided, that is, each time the first network device receives a packet, it can determine whether the packet belongs to the service flow where the third packet is located and the packet. Whether the text has a second tag value. If the first network device determines that the fourth packet belongs to the service flow where the third packet is located and has the second tag value, the first network device may collect the statistics of the third packet received in the second time period. And the number of messages with the second tag value is increased by one.

With reference to the second aspect, or the first possible implementation manner of the second aspect, in a second possible implementation manner of the second aspect, the method further includes:

Determining, by the first network device, the number of packets in the service flow of the third packet received in the second time period;

The first network device sends the determined number of received messages to the control device.

That is, the first network device may count the number of packets of the service flow in which the third packet received in the second time period is the same as that of the third packet, and the number of statistics that the first network device can obtain. The network device that sends the packet of the service flow in which the third packet is sent may also send the number of the service packet of the service packet in the first time period to the control device. Therefore, the control device can calculate the number of lost packets of the service flow in which the third packet is located in the second time period.

A third aspect provides a network device, including a first interface, a forwarding chip, and a second interface, where the forwarding chip is configured to:

Receiving, by the first interface, a first packet;

Encapsulating the VXLAN header and the outer IP header outside the first packet to obtain a second packet, where the reserved bit in the VXLAN header is set to a first tag value, and the first tag value is used by The time period for indicating that the network device sends the second packet is in a first period, where the first time period is that the network device collects statistics of the number of packets of the service flow where the second packet is located. one of;

Sending the second packet by using the second interface.

In conjunction with the third aspect, in a first possible implementation manner of the third aspect, the network device further includes a third interface; the forwarding chip is further configured to:

Determining, in the first time period, the number of packets in the service flow where the second packet is sent;

Sending, by the third interface, the determined number of sent messages to the control device.

In conjunction with the third aspect or the first possible implementation manner of the third aspect, in a second possible implementation manner of the third aspect, the forwarding chip is further configured to:

Receiving, by the second interface, a third packet sent by the second network device, where the reserved bit in the VXLAN header of the third packet is set to a second tag value;

Determining, according to the second tag value in the VXLAN header of the third packet, that the time that the second network device sends the third packet is in a second time period, where the second time period is the network device statistics. One of a plurality of statistical periods of the number of packets of the service flow in which the third packet is located.

In conjunction with the second possible implementation of the third aspect, in a third possible implementation manner of the third aspect, the forwarding chip is further configured to:

Determining, by the number of packets in the service flow, where the third packet is received in the second time period;

Sending, by the second interface, the determined number of received messages to the control device.

A fourth aspect provides a network device, including an interface and a forwarding chip, where the forwarding chip is configured to:

Receiving, by the interface, a third packet sent by the second network device; the reserved bit in the VXLAN header of the third packet is set to a second tag value;

If the third packet is the first packet that is received by the network device and has the second tag value, determining, by the second tag value, that the second network device sends the third packet The second time period is one of a plurality of statistical periods in which the network device counts the number of packets of the service flow in which the third packet is located;

And counting from the receipt of the third packet, to count the number of packets in the service flow of the third packet received in the second time period.

In conjunction with the fourth aspect, in a first possible implementation manner of the fourth aspect, the forwarding chip is further configured to:

Receiving, by the interface, the fourth packet sent by the second network device after receiving the timing of receiving the third packet;

Determining, according to the VXLAN header of the fourth packet, that a reserved bit in the VXLAN header of the fourth packet is set to the second flag value; and the third packet to be received in the second time period Add 1 to the number of packets in the service flow.

In conjunction with the fourth aspect, or the first possible implementation manner of the fourth aspect, in a second possible implementation manner of the fourth aspect, the forwarding chip is further configured to:

Determining, by the number of packets in the service flow, where the third packet is received in the second time period;

And transmitting, by the interface, the determined number of received messages to the control device.

In a fifth aspect, a network device for transmitting a message is provided, the network device comprising means for performing the method of the first aspect.

In a sixth aspect, a network device for receiving a message is provided, the network device comprising means for performing the method of the second aspect.

DRAWINGS

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the embodiments of the present invention will be briefly described below. It is obvious that the following drawings are only some embodiments of the present invention. Those skilled in the art can also obtain other drawings based on these drawings without paying any creative work.

FIG. 1 is a schematic diagram of a scenario of a VXLAN network according to an embodiment of the present invention;

2 is a flowchart of a method for sending a message according to an embodiment of the present invention;

3 is a schematic structural diagram of a second packet according to an embodiment of the present invention;

FIG. 4 is a schematic structural diagram of a first network device according to an embodiment of the present invention.

detailed description

The technical solutions in the embodiments of the present invention will be clearly described below in conjunction with the accompanying drawings in the embodiments of the present invention.

Hereinafter, some of the terms in the present invention will be explained.

1) A network device, which may be a physical device in a network such as a switch (English: switch) or a router (English: router), or a virtual device in a network such as a virtual switch.

2) The control device, the control device may be a stand-alone device, such as a server or a router, or a function module located in another device, for example, a function module located in a device such as a server or a router, as long as The control device can communicate with the network device.

3) Business flow. A set of features is defined, and any message that satisfies this set of characteristics belongs to a service flow. For example, a tuple of the header of a message can be used as a set of features, and packets with the same value of the tuple belong to the same service flow. For example, the tuple as a feature is a quintuple, and the quintuple may include: a source Internet Protocol (IP) address, a source port number, a destination IP address, a destination port number, and a transport layer protocol type.

4) "Multiple" means two or more.

First, the application scenario of the present invention will be introduced.

FIG. 1 is a schematic diagram of a possible VXLAN network in an embodiment of the present invention. The VXLAN network in Figure 1 includes devices A to I, where devices B to G are network devices, device A is a control device, and device H is a server connected to the network through device D. For example, virtual machine VM1 is running in device H. The device I is a server connected to the network through the device G, for example, the virtual machine VM2 is running in the device 1. As can be seen from the connection relationship in Fig. 1, the control device A is able to communicate with each of the network devices. Alternatively, the control device can also communicate only with a portion of the network device.

For example, if virtual machine VM1 wants to send message 1 to virtual machine VM2, virtual machine VM1 sends message 1 to device D through device H. After receiving the packet 1, the device D determines the destination VXLAN gateway of the packet 1 according to the destination address and other information of the packet 1. For example, the destination VXLAN gateway of the packet 1 is the device G, and the device D is the packet. The VXLAN header and the outer IP header are added to obtain the packet 2, the destination network device of the packet 2 is the device G, and the device D sends the packet 2 to the device G. When sending packet 2 to device G, it will pass through other devices in the middle. These devices are called intermediate devices. After receiving the packet 2, the device G can remove the outer IP header and the VXLAN header of the packet 2 to obtain the packet 1, and send the packet 1 to the virtual machine VM2 in the device 1.

Embodiments of the present invention are described below in conjunction with the drawings.

Referring to FIG. 2, an embodiment of the present invention provides a packet sending method, which may be performed by a network device, for example, the device D or the device G in FIG. 1, for example, the network device is referred to as a first Internet equipment. The flow of the method is described below.

Step 201: The first network device receives the first packet.

Step 202: The first network device encapsulates the VXLAN header and the outer IP header in the first packet to obtain the second packet.

Step 203: The first network device sends the second packet.

The first network device receives the packet sent by the virtual machine, for example, the packet is referred to as the first packet, and the first packet has an IP header, and the destination address of the first packet is the address of another virtual machine. The virtual machine that sends the first message is, for example, in a device such as a terminal or server connected to the first network device. The virtual machine to receive the first packet runs in a device such as a terminal or a server connected to the second network device. The second network device is located in the same VXLAN network as the first network device. For example, in FIG. 1 , the first network device is, for example, the device D in FIG. 1 , and the network device (ie, the second network device) serving the server running the virtual machine that receives the first packet may be the one in FIG. 1 . Device G, or the first network device is, for example, device G in FIG. 1, and the second network device is, for example, device D in FIG.

For example, according to the packet header of the first packet, it can be determined that the first packet belongs to service stream 1.

After receiving the first packet, the first network device determines a VXLAN gateway address by using a lookup table (for example, a forwarding table or a flow table), and uses the address as the destination address of the outer IP header.

After determining the destination address of the second packet, the first network device encapsulates the outer VXLAN header outside the first packet, and encapsulates the outer IP header outside the outer VXLAN header, and the packet obtained after the encapsulation is completed is called Second message. The first network device may send the second packet according to the destination address of the second packet.

If the performance of the service flow in which the second packet is to be measured, the first network device may mark the second packet, for example, marking the second packet with the first tag value, then the first network device is to be in the second packet. Select one or more bits in the outer VXLAN header to mark it.

For example, the first network device may mark a reserved bit in an outer VXLAN header (hereinafter referred to as a VXLAN header) of the second message. The reserved bits in the VXLAN header have 32 bits. The first network device may mark all reserved bits in the VXLAN header, and may also mark some reserved bits in the VXLAN header, for example, two reserved bits may be marked. The first network device may mark at least two of the reserved bits of the VXLAN header of the second message. After the first network device marks at least two of the reserved bits of the VXLAN header of the second message, the reserved bit of the VXLAN header of the second message is set to the first tag value.

In the embodiment of the present invention, the tag refers to modifying the value of one or more bits in the VXLAN header to a value other than the default value, and the modified value is a tag value. For example, to mark a bit in the VXLAN header, the default value of this bit is 0, then the value of this bit is modified to 1 after the bit is marked. For example, the first network device may mark the first bit and the second bit in the reserved bits of the VXLAN header of the second packet, and the default values of the first bit and the second bit are both 0, for example, the tag value may be It is any one of 01, 10, and 11.

The reserved bit in the VXLAN header is set to a first tag value, for example, the first tag value is used to indicate that the time when the first network device sends the second packet is in the first time period, and the first time period is the second time in the first network device. One of the multiple statistical periods of the number of packets in the service flow of the packet.

The plurality of statistical periods may be consecutive periods, for example, the first period is 0s to 10s, the second period is 10s to 20s, the third period is 20s to 30s, and the like. Of course, the duration of each statistical period may also be unequal.

The second packet is a packet sent by the first network device after the start of the first time period. For example, the second packet may be any packet that belongs to the service flow of the second packet sent by the first network device in the first time period. . The first flag value of the reserved bit of the VXLAN header of the second packet may be used to indicate that the time when the first network device sends the second packet is in the first time period. If the performance of the service flow in which the second packet is located in the second time period is also to be measured, the packet belonging to the service flow in which the second packet is located in the second time period is marked. It is also possible to mark the reserved bits of the VXLAN header of these messages. The tag value set in the packet of the service flow in which the second packet is located in the second time period is different from the first tag value to distinguish the packets in the adjacent time period. For example, the message reserved bit of the service flow in which the second packet is located in the two time periods may be set as the second tag value. For another example, if the traffic of the second message in the third time period is also measured, The performance of the message that belongs to the service flow in which the second packet is located in the third time period is marked. It is also possible to mark the reserved bits of the VXLAN header of these messages. The value of the tag set in the packet corresponding to the service flow in which the second packet is located in the third time period is different from the value of the second tag, so as to distinguish the packet in the adjacent time period, and the second packet belongs to the second packet. The tag value set by the message of the service flow may be the same as or different from the first tag value. That is, when the tag value is set, as long as the tag values of the adjacent time periods are different, the tag values can be reused for the non-adjacent time periods to reduce the complexity of the tag values.

For example, refer to FIG. 3, which is a schematic structural diagram of a second packet. The first packet (ie, the original packet in FIG. 3) includes an inner Ethernet header (English: inner Ethernet header) and a payload (English: payload). ). The first packet is encapsulated in a VXLAN header (English: VXLAN header) and an outer UDP header (English: outer UDP header) to obtain a second packet.

In Figure 3, the VXLAN header includes VXLAN flag bits (English: VXLAN Flags), VXLAN network identifier (VXLAN Network Identifier, VNI), and two reserved (English: Reserved) bits. The reserved bits are respectively referred to as a first segment reserved bit (for example, a reserved bit of 24 bits in FIG. 3) and a second reserved bit (for example, a reserved bit of 8 bits in FIG. 3).

VXLAN Flags occupies 8 bits. Among the 8 bits, the I bit (for example, the right-to-left fourth bit in Figure 3) is 1, to indicate that the message is valid, and the remaining 7 bits are R bits, which are reserved bits ( These reserved bits may not be reserved bits for marking in the embodiment of the present invention, and the default setting is 0.

The first reserved bit occupies 24 bits.

VNI occupies 24 bits. In a VXLAN network, each tenant can be identified by a unique VNI, or multiple tenants can be assigned to a single tenant.

The second reserved position occupies 8 bits.

The first reserved bit and the second reserved bit in the VXLAN header of the second message can be used for marking. The first network device can arbitrarily select at least two of them for marking.

Marking the reserved bits in the VXLAN header can be used to indicate two layers of meaning: 1. The message is a measurement message; 2. The tag value corresponding to the reserved bit after the tag (for example, the first tag value) It is used to indicate the statistical period in which the packet is located, that is, the statistical period in which the time when the first network device sends the packet is indicated.

For example, the first network device selects to mark the first bit and the second bit of the first reserved bit in the VXLAN header of the message 1, for example, changing the value of the two bits from 00 to 01. Then, the message 1 belongs to the measurement message, and the statistical period in which the message 1 is located is the statistical period corresponding to the tag value of the VXLAN header. For example, the statistical period is the statistical period 1. For example, the first network device takes the first bit and the second bit of the first reserved bit in the VXLAN header of the message 2. If the value is changed from 00 to 10, the message 2 belongs to the measurement message, and the statistical period in which the message 2 is located is, for example, the statistical period 2, and the statistical period 2 is adjacent to the statistical period 1. For example, the first network device changes the value of the first bit and the second bit in the first reserved bit in the VXLAN header of the packet 3 from 00 to 01 or 11, and the packet 3 belongs to the measurement packet. The statistical period in which the message 3 is located is, for example, a statistical period 3, and the statistical period 3 is adjacent to the statistical period 2.

Of course, the above enumeration means for indicating the statistical period is only an example. In the actual application, the statistical period can also be indicated by other means by using the flag value of the reserved bit.

Marking the VXLAN header of the message instead of marking the outer IP header prevents mis-marking of non-VXLAN messages.

Optionally, the method further includes:

Determining, by the first network device, the number of the packets in the service flow where the second packet sent in the first time period is located;

The first network device sends the determined number of transmitted messages to the control device.

To count the number of packets of the service flow in which the second packet is located, the first network device may collect the number of packets of the service flow in which the second packet is sent in the first time period, and obtain the statistics. The quantity is sent to the control device.

For example, if the destination address of the second packet is the address of the second network device, the second network device receives the first packet of the service flow where the second packet is located, according to the VXLAN header of the packet. The flag value of the reserved bit (for example, the first tag value) may determine that the message is a measurement message, and may determine a statistical period in which the message is located, for example, as the first time period, then the second network device receives the message. And the number of the packet with the first tag value of the service flow in which the second packet received in the first time period is received by the packet with the first tag value in the service flow where the first second packet is located. In this way, the second network device can send the statistically obtained quantity to the control device.

The control device receives the statistics of the first network device and the second network device, where the first network device sends the packet with the first tag value of the service flow where the second packet sent in the first time period is located. The number of the packets with the first tag value of the service flow in which the second packet received in the first time period is sent by the second network device, and the control device can obtain the number according to the two statistics. The number of lost packets in the service flow of the second packet in the first time period (for example, the number of packets sent by the first network device minus the number of packets received by the second network device can obtain the number of lost packets) Therefore, the packet loss rate of the service flow in which the second packet is located in the first time period can be obtained.

Optionally, the method further includes:

The first network device determines that the second packet is a packet for measuring the delay; wherein the delay is a delay of the service flow where the second packet is located in the first time period;

The first network device sends the time when the second packet is sent to the control device.

For example, the source device of the service flow 1 is the first network device, and the destination device is the second network device, and the first network device and the second network device agree in advance to select the first sent packet in the service flow 1 to measure the service. The delay of stream 1 during the first time period. For example, if the first packet belonging to the service flow 1 sent by the first network device in the first time period is the message 1, the first network device marks the message 1 (for example, the pre-VXLAN header of the message 1) After the location is set to the flag value 1), the message 2 is obtained, and the message 2 is sent. The manner of marking the message 1 is as described above. The first network device sends the time when the message 2 is sent to the control device. The second network device may send the time when the first message with the tag value 1 is received to the control device (the first message with the tag value 1 received by the second network device may be the message 2 or not the message. 2). For example, when the control device subtracts the time of sending the message sent by the first network device by using the time of receiving the message sent by the second network device, the time delay of the service stream 1 in the first time period can be obtained.

Optionally, the method further includes:

The first network device receives the third packet sent by the second network device, where the reserved bit in the VXLAN header of the third packet is set with a tag value, where the tag value is used to instruct the second network device to send the third packet. The statistical period in which the time of the text is located, for example, if the flag value is the first tag value, indicating that the time period in which the second network device sends the third message is the first time period, if the tag value is the first time The second flag value indicates that the statistical period in which the second network device sends the third message is the second time period, and so on.

The first network device determines, according to the second flag value in the VXLAN header of the third packet, that the time that the second network device sends the third packet is in the second time period, where the second time period is that the first network device collects the service of the third packet One of a plurality of statistical periods of the number of streams of the stream.

That is, for one service flow, the first network device may be the source device, and for another service flow, the first network device may also be the destination device. When the first network device is the destination device, it can receive the packets sent by the other source devices. The first network device may also have measurement packets in the packets. The first network device determines the reserved bits in the VXLAN header of the received packet. Whether it is marked or not can determine which messages are measurement messages, that is, the measurement message is marked, otherwise it is an ordinary message. The way of marking, as well as the information indicated by the reserved bits after marking, are described above.

In addition, if the third packet is the first packet with the second tag value received by the first network device, the first network device determines that the second network device sends the third packet according to the second tag value. In addition to the second time period, timing may also be started from receiving the third message to count the number of messages in the service flow in which the third message received in the second time period is located.

Optionally, after the first network device starts timing by receiving the third packet, the method further includes:

Receiving, by the first network device, a fourth packet sent by the second network device;

Determining, by the first network device, that the reserved bit in the VXLAN header of the fourth packet is set to the second tag value according to the VXLAN header of the fourth packet;

The first network device adds 1 to the number of packets in the service flow in which the third packet received in the second time period is located.

That is, if the first network device is to count the number of packets with the second tag value of the service flow in which the third packet received in the second time period is located, the first network device may receive a message every time. Determine whether the packet belongs to the service flow where the third packet is located and whether the packet has the second tag value. For example, the first network device determines that the fourth packet belongs to the service flow where the third packet is located and has the second tag value, and the first network device may collect the service flow of the third packet received in the second time period. The number of messages in and with the second tag value is increased by one.

Optionally, the method further includes:

Determining, by the first network device, the number of the packets in the service flow in which the third packet received in the second time period is located;

The first network device sends the determined number of received messages to the control device.

That is, when the first network device is the destination device, when receiving the packet of the service flow in which the first third packet is located, the VXLAN header of the packet can determine that the packet is a measurement packet, and can determine The statistical period in which the packet is located, for example, is determined to be the second time period, and the first network device may start counting the third report received in the second time period from the message of the service flow in which the first third message is received. The number of packets of the service flow and having the same tag as the third packet, so that the first network device can send the statistically obtained quantity to the control device.

Similarly, for example, the first network device is the destination device of the service flow where the third packet is located, and the second network device is the source device of the service flow where the third packet is located, and the second network device may also be counted in the second time period. The number of the marked packets that are the same as the third packet, and the second network device may also send the statistics to the control device, and the details are not described.

In addition, when the first network device is used as the destination device and the second network device is used as the source device, the time delay of the service flow in which the third packet is located in the second time period may be measured, and the manner of measuring the delay is as described above. The method for measuring the delay of the service flow in which the second packet is located in the first time period is similar, and is not described in detail.

In addition, as described above, the source device or the destination device of the service flow can send statistics and the number of received and sent packets to the control device, and according to the introduction of FIG. 1, the packet is transmitted in the VXLAN network. It is also possible to go through some intermediate devices (for example, in Figure 1, if device D is the source network device and device G is the destination network device, then device B and device C may be a group of intermediate devices, or in another path, device F and The device E can be a group of intermediate devices. In actual applications, the intermediate devices can also send information to the control device. For example, when the device B is used as the intermediate device, the device can also collect the packets with the tag value sent in any statistical period. Quantity, or statistics in The number of packets with the tagged value received in any statistical period, and the number of statistics is sent to the control device to obtain the number of lost packets of the service flow in which the packet is located during the statistical period, or, for example, device B as the middle The device may also send the time of the message with a certain tag value sent in any statistical period to the control device, or send the time of the message with a certain tag value received in any statistical period to the control device. To obtain the delay of the service flow in which the packet is located during the statistical period, and so on, the manner of statistics, the manner of sending, etc. can be referred to the previous introduction. The intermediate device does not need to add a VXLAN header and an outer IP header to the packet, and does not need to remove the VXLAN header and the outer IP header of the packet to forward the packet.

Whether the intermediate device also needs to send information for measuring the performance of the service flow to the control device, and if necessary, which intermediate device sends the information for measuring the performance of the service flow to the control device, which can be pre-defined, for example, Pre-specified by the control device, or may be pre-defined by the protocol, and the like.

The device in the embodiment of the present invention is described below with reference to the accompanying drawings.

Referring to FIG. 4, an embodiment of the present invention provides a network device, which may be a first network device as described above. The first network device may include a first interface 401, a forwarding chip 402, and a second interface 403.

The first interface 401 can be used for the first network device to send and receive packets of the unencapsulated VXLAN header. For example, the first interface 401 can be considered as a user-oriented interface.

The second interface 403 can be used by the first network device to receive the packet encapsulated by the VXLAN header sent by the other network device, and can be used to send the packet encapsulating the VXLAN header to the other network device. For example, the second interface 403 can be considered. The interface that belongs to the VXLAN tunnel side.

The first interface 401 and the second interface 403 are network interfaces of the network devices, and are respectively connected to different devices. The network interface can be a wired interface, a wireless interface, or a combination thereof. The wired interface can for example be an Ethernet interface. The Ethernet interface can be an optical interface, an electrical interface, or a combination thereof. The wireless interface may be, for example, a wireless local area network (English: wireless local area network, abbreviation: WLAN) interface.

The forwarding chip 402 can be configured to send and receive packets through the first interface 401 and the second interface 403, respectively encapsulate the VXLAN header and the outer IP header of the packet received through the first interface 401, and mark the VXLAN header, and count the statistics in any statistics. The number of messages with tag values sent during the time period, the number of messages with tag values received during any statistical period, and so on. The forwarding chip 402 can be an application-specific integrated circuit (ASIC), a programmable logic device (English: programmable logic device, abbreviation: PLD), a network processor (English: network processor), a multi-core central The processor (English: central processing unit, CPU for short) is used to implement the core of the forwarding plane or a combination thereof. The above PLD may be a complex programmable logic device (English: complex programmable logic device, abbreviation: CPLD). Field-programmable gate array (English: field-programmable gate array, abbreviation: FPGA), general array logic (English: general array logic, abbreviation: GAL) or any combination thereof.

Optionally, the second interface 403 may include one interface or multiple interfaces. Then, the second interface 403 can send and receive packets, and the second interface 403 can send and receive packets through one interface or multiple interfaces included in the second interface 403.

Optionally, the forwarding chip 402 can send information to the control device through the second interface 403. For example, the information sent by the forwarding chip 402 to the control device can be used to count performance of a certain service flow in any statistical period, such as the number of lost packets, Delay and so on.

The interface that interacts with other network devices, and the interface that interacts with the control device, may use the same interface in the second interface 403, or may use different interfaces included in the second interface 403.

The morphological and positional relationship of each interface in FIG. 4 is only an example. In practical applications, the form of the interface, the deployment mode, and the like are obviously not limited thereto.

The device in FIG. 4 in the embodiment of the present invention corresponds to the method described in the process of FIG. 3, and the work performed by each module in the device, and the detailed description in the execution process, etc., may be referred to the method part, and details are not described herein.

In the embodiment of the present invention, when the first network device encapsulates the VXLAN header for the first packet, it may be a reserved bit flag in the VXLAN header, that is, the reserved bit in the VXLAN header is set to the first tag value, and the first tag is used. The value may indicate which statistical period the second network device sends the second packet, and the different packets may be distinguished according to the reserved bits in the VXLAN header of the packet. Different packets are used to test the performance of different network segments in different statistical periods. The test granularity of network performance is refined, the accuracy of network performance testing is improved, and the value available for test results is higher.

In the present invention, it should be understood that the disclosed apparatus and method can be implemented in other ways. For example, the device embodiments described above are merely illustrative. For example, the division of the unit or unit is only a logical function division. In actual implementation, there may be another division manner, for example, multiple units or components may be used. Combinations can be integrated into another system, or some features can be ignored or not executed. In addition, the mutual coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection through some interface, device or unit, and may be electrical or otherwise.

The units described as separate components may or may not be physically separated, and the 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 implement the embodiments of the present invention.

The functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may also be an independent physical module.

The integrated unit, if implemented in the form of a software functional unit and sold or used as a standalone product, may be stored in a computer readable storage medium. Based on such understanding, all or part of the technical solution of the present invention may be embodied in the form of a software product stored in a storage medium, including a plurality of instructions for causing a computer device (which may be a personal computer, A server, or network device, or the like, or a processor (English: processor) performs all or part of the steps of the methods described in various embodiments of the present invention. The foregoing storage medium includes: Universal Serial Bus flash drive (English: Universal Serial Bus flash drive), mobile hard disk, read-only memory (English: read-only memory, ROM), random access memory (English: random-access) A medium that can store program code, such as memory, RAM, or a disk.

The above embodiments are only used to describe the technical solutions of the present invention in detail, but the description of the above embodiments is only for the purpose of facilitating the understanding of the embodiments of the present invention, and should not be construed as limiting the embodiments of the present invention. Variations or substitutions that may be readily conceived by those skilled in the art are intended to be included within the scope of the present invention.

Claims (21)

A message sending method, comprising: Receiving, by the first network device, the first packet; The first network device encapsulates a virtual extended local area network (VXLAN) header and an outer network protocol (IP) header outside the first packet to obtain a second packet; wherein the reserved bit in the VXLAN header The first tag value is used to indicate that the time that the first network device sends the second packet is in a first time period, where the first time period is the first network device statistics. One of a plurality of statistical periods of the number of packets of the service flow in which the second packet is located; The first network device sends the second packet. The method of claim 1 wherein the method further comprises: Determining, by the first network device, the number of packets in the service flow in which the second packet is sent in the first time period; The first network device sends the determined number of sent packets to the control device. The method of claim 1 or 2, wherein the method further comprises: Receiving, by the first network device, a third packet sent by the second network device, where the reserved bit in the VXLAN header of the third packet is set to a second tag value; Determining, by the first network device, that the time that the second network device sends the third packet is in a second time period according to the second tag value in the VXLAN header of the third packet, where the second time period is And counting, by the first network device, one of a plurality of statistical periods of the number of packets of the service flow in which the third packet is located. The method of claim 3, wherein the method further comprises: Determining, by the first network device, the number of packets in the service flow of the third packet received in the second time period; The first network device sends the determined number of received messages to the control device. A message receiving method, comprising: Receiving, by the first network device, a third packet sent by the second network device, where the reserved bit in the virtual extended local area network (VXLAN) header of the third packet is set to a second tag value; If the third packet is the first packet with the second tag value received by the first network device, the first network device determines the second network according to the second tag value. The time period in which the device sends the third packet is in a second time period; the second time period is one of a plurality of statistical periods in which the first network device collects the number of packets of the service flow in which the third packet is located; The first network device starts timing to receive the third packet, to count the number of packets in the service flow of the third packet received in the second time period. The method of claim 5, further comprising: after the first network device starts timing the third message, Receiving, by the first network device, a fourth packet sent by the second network device; Determining, by the first network device, that a reserved bit in the VXLAN header of the fourth packet is set to the second tag value according to a VXLAN header of the fourth packet; The first network device adds 1 to the number of packets in the service flow in which the third packet is received in the second time period. The method of claim 5 or claim 6, wherein the method further comprises: Determining, by the first network device, the number of packets in the service flow of the third packet received in the second time period; The first network device sends the determined number of received messages to the control device. A network device, comprising: a first interface, a forwarding chip, and a second interface; wherein the forwarding chip is used to: Receiving, by the first interface, a first packet; Encapsulating a virtual extended local area network (VXLAN) header and an outer internet protocol (IP) header outside the first packet to obtain a second packet; wherein a reserved bit in the VXLAN header is set as a first label a value, the first tag value is used to indicate that the time that the network device sends the second packet is in a first time period, where the first time period is that the network device collects a service flow of the second packet One of a plurality of statistical periods of the number of messages; Sending the second packet by using the second interface. The network device according to claim 8, wherein the network device further comprises a third interface; the forwarding chip is further configured to: Determining, in the first time period, the number of packets in the service flow where the second packet is sent; Sending, by the third interface, the determined number of sent messages to the control device. The network device according to claim 8 or 9, wherein the forwarding chip is further configured to: Receiving, by the second interface, a third packet sent by the second network device, where the reserved bit in the VXLAN header of the third packet is set to a second tag value; Determining, according to the second tag value in the VXLAN header of the third packet, that the time that the second network device sends the third packet is in a second time period, where the second time period is the network device statistics. One of a plurality of statistical periods of the number of packets of the service flow in which the third packet is located. The network device according to claim 10, wherein the forwarding chip is further configured to: Determining, by the number of packets in the service flow, where the third packet is received in the second time period; Sending, by the second interface, the determined number of received messages to the control device. A network device, comprising: an interface and a forwarding chip; wherein the forwarding chip is used to: Receiving, by the interface, a third packet sent by the second network device; the reserved bit in the virtual extended local area network (VXLAN) header of the third packet is set to a second tag value; If the third packet is the first packet that is received by the network device and has the second tag value, determining, by the second tag value, that the second network device sends the third packet The second time period is one of a plurality of statistical periods in which the network device counts the number of packets of the service flow in which the third packet is located; And counting from the receipt of the third packet, to count the number of packets in the service flow of the third packet received in the second time period. The network device according to claim 12, wherein the forwarding chip is further configured to: Receiving, by the interface, the fourth packet sent by the second network device after receiving the timing of receiving the third packet; Determining, according to the VXLAN header of the fourth packet, that a reserved bit in the VXLAN header of the fourth packet is set to the second flag value; and the third packet to be received in the second time period Add 1 to the number of packets in the service flow. The network device according to claim 12 or 13, wherein the forwarding chip is further configured to: Determining, by the number of packets in the service flow, where the third packet is received in the second time period; And transmitting, by the interface, the determined number of received messages to the control device. A network device, comprising: a first transceiver module, configured to receive the first packet; a processing module, configured to encapsulate a virtual extended local area network (VXLAN) header and an outer network protocol (IP) header outside the first packet to obtain a second packet, where the reserved bit in the VXLAN header is a first flag value, where the first tag value is used to indicate that the time that the network device sends the second packet is in a first time period, where the One time period is one of a plurality of statistical periods in which the network device counts the number of packets of the service flow in which the second packet is located; The second transceiver module is configured to send the second packet. A network device according to claim 15 wherein: The processing module is further configured to: determine a quantity of the message in the service flow in which the second packet is sent in the first time period; The second transceiver module is further configured to: send the determined number of sent packets to the control device. A network device according to claim 15 or 16, wherein The first transceiver module is further configured to: receive a third packet sent by the second network device, where the reserved bit in the VXLAN header of the third packet is set to a second tag value; The processing module is further configured to: determine, according to the second tag value in the VXLAN header of the third packet, that the time that the second network device sends the third packet is in a second time period, where the The second period is one of a plurality of statistical periods in which the network device collects the number of packets of the service flow in which the third packet is located. A network device according to claim 17, wherein The processing module is further configured to: determine a quantity of the message in the service flow of the third packet received in the second time period; The second transceiver module is configured to: send the determined number of received messages to the control device. A network device, comprising: a transceiver module, configured to receive a third packet sent by the second network device, where the reserved bit in the virtual extended local area network (VXLAN) header of the third packet is set to a second tag value; a processing module, configured to determine, according to the second tag value, the second network device sending station, if the third packet is the first packet with the second tag value received by the network device The time of the third packet is in a second period; the second period is one of a plurality of statistical periods in which the network device collects the number of packets of the service flow in which the third packet is located; The processing module is further configured to start timing to receive the third packet, to count the number of packets in the service flow of the third packet received in the second time period. A network device according to claim 19, wherein The transceiver module is further configured to: after the processing module starts timing the third packet, receive the fourth packet sent by the second network device; The processing module is further configured to: determine, according to the VXLAN header of the fourth packet, that a reserved bit in the VXLAN header of the fourth packet is set to the second tag value; The processing module is further configured to: increase the number of the packets in the service flow in which the third packet is received in the second time period by one. A network device according to claim 19 or 20, wherein The processing module is further configured to: determine a quantity of the message in the service flow of the third packet received in the second time period; The transceiver module is configured to: send the determined number of received messages to the control device.

Images