CN106998299B - Method, device and system for identifying network equipment in data center network - Google Patents

Abstract

The invention discloses a method, device and system for identifying network equipment in a data center network, belonging to the field of network technology. The method is used for a control device in a data center network, and the method includes: receiving a connection message sent by a first network device in the data center network, where the connection message includes a layer identifier of the first network device ; according to the layer identifier, identifying the layer type of the first network device; according to the pre-acquired topology information of each network device that establishes a connection with the control device, and the layer type of the first network device, identifying and The hierarchical type of each network device to which the control device establishes a connection. The invention reduces the calculation complexity when identifying the network equipment in the data center network, and solves the problem of high complexity of the identification algorithm in the related art. The invention is used to identify network devices in a data center network.

Description

Method, device and system for identifying network equipment in data center network

technical field

The invention relates to the field of network technology, in particular to a method, device and system for identifying network equipment in a data center network.

Background technique

The data center network is a network applied in the data center. The data center network connects a certain number of servers through network devices such as switches and routers to form a server network with high bandwidth, high reliability and load balancing, which can provide external computing and Storage and other services. After the network devices in the data center network are deployed, each network device needs to establish a connection with the control device of the data center, so that the control device can control and manage each network device. Afterwards, the control device can obtain the topology information of each network device through the topology discovery process, and identify the topology structure of the data center network and the layer type of each network device based on the obtained topology information, such as top-of-rack switches and aggregation layers. switches and core layer switches, etc. Finally, the control device can deliver corresponding configuration files to network devices of different levels and types according to the identification results, thereby realizing automatic configuration of network devices in the data center network.

In related technologies, the 2009 SIGCOMM conference paper "PortLand: A Scalable Fault-TolerantLayer 2Data Center Network Fabric" introduced a scheme for identifying the location of network devices in the data center network according to the topology level. In this solution, the control device can obtain and analyze the topology information of the network devices currently connected to the control device, the topology information includes the connection status of each network device with other network devices, if the number of ports of a certain network device is K , and no more than K/2 of the K ports of the network device are connected to other network devices, the control device can identify the layer type of the network device as a top-of-rack switch; further, the control device can connect with the The layer type of the network device connected to the top-of-rack switch is identified as an aggregation layer switch, and the layer type of the network device whose ports are all connected to the aggregation layer switch is identified as a core layer switch.

However, in the above-mentioned network device discovery solution, when identifying the top-of-rack switch, it is necessary to analyze the connection status of all network devices. This solution has high computational complexity and low flexibility in network device identification.

Contents of the invention

In order to solve the problem of high computational complexity in identifying the location of network equipment in the related art, embodiments of the present invention provide a method, device and system for identifying network equipment in a data center network. Described technical scheme is as follows:

In the first aspect, a method for identifying network devices in a data center network is provided, which is used for a control device in a data center network, and the method includes:

Receive a connection message sent by a first network device in the data center network, where the connection message includes a layer identifier of the first network device;

Identify the layer type of the first network device according to the layer identifier;

According to the pre-acquired topology information of each network device that establishes a connection with the control device, and the layer type of the first network device, identify the layer type of each network device that establishes a connection with the control device.

Optionally, identifying the layer type of each network device establishing a connection with the control device according to the pre-acquired topology information of each network device establishing a connection with the control device and the layer type of the first network device, including:

classifying network devices whose hierarchical type is determined as identified network devices, where the network devices whose hierarchical type is determined include the first network device;

Judging whether there is an unidentified network device to be identified that is connected to the identified network device among the network devices that establish a connection with the control device;

When the network device to be identified exists in each network device that establishes a connection with the control device, identify the network device according to the pre-acquired topology information of each network device that establishes a connection with the control device and the layer type of the identified network device. The layer type of the network device to be identified;

The above steps are repeated until there is no unidentified network device to be identified that is connected to the identified network device among the network devices that establish a connection with the control device.

Optionally, when the layer type of the first network device is a virtual switch, a core layer switch or a soft switch, according to the pre-acquired topology information of each network device that establishes a connection with the control device, and the first network device The layer type of the network device identifies the layer type of each network device that establishes a connection with the control device, including:

Identifying the layer type of the second network device connected to the first network device according to the pre-acquired topology information of each network device that establishes a connection with the control device and the layer type of the first network device;

identifying the layer type of an unrecognized third network device connected to the second network device according to the pre-acquired topology information of each network device establishing a connection with the control device and the layer type of the second network device;

According to the pre-acquired topology information of each network device connected to the control device and the layer type of the third network device, identify the layer type of the unrecognized fourth network device connected to the third network device.

Optionally, identify an unidentified fourth network connected to the third network device according to the pre-acquired topology information of each network device that establishes a connection with the control device and the layer type of the third network device After the hierarchical type of the device, the method also includes:

judging whether the number of unrecognized network devices among the network devices establishing a connection with the control device is greater than a first preset threshold, and whether the number of the fourth network device is greater than a second preset threshold;

When the number of unrecognized network devices among the network devices establishing a connection with the control device is greater than the first preset threshold, or the number of the fourth network device is greater than the second preset threshold, an identification correction process is performed , the identification correction process includes:

Determine the number n of the identified third network devices;

According to the pre-acquired topology information of each network device that establishes a connection with the control device, determine whether the number m of the third network device among the network devices connected to the fourth network device is greater than or equal to

When the number m of the third network devices among the network devices connected to the fourth network device is greater than or equal to , correct the layer type of the fourth network device to be the same layer type as that of the second network device.

Optionally, when the layer type of the first network device is a virtual switch, a core layer switch or a soft switch, according to the pre-acquired topology information of each network device that establishes a connection with the control device, and the first network device The layer type of the network device identifies the layer type of each network device that establishes a connection with the control device, including:

Identifying the layer type of the second network device connected to the first network device according to the pre-acquired topology information of each network device that establishes a connection with the control device and the layer type of the first network device;

identifying the layer type of an unrecognized third network device connected to the second network device according to the pre-acquired topology information of each network device establishing a connection with the control device and the layer type of the second network device;

Determine the number n of the identified third network devices;

According to the pre-acquired topology information of each network device that establishes a connection with the control device, determine whether the number m of the third network device among the network devices connected to the fourth network device is greater than or equal to The fourth network device is an unidentified network device that establishes a connection with the third network;

When the number m of the third network devices among the network devices connected to the fourth network device is greater than or equal to , identifying the layer type of the fourth network device as the same layer type as the second network device;

When the number m of the third network devices among the network devices connected to the fourth network device is less than At this time, the layer type of the fourth network device is identified according to the pre-acquired topology information of each network device that establishes a connection with the control device and the layer type of the third network device.

Optionally, after identifying the layer type of each network device that establishes a connection with the control device according to the pre-acquired topology information of each network device that establishes a connection with the control device and the layer type of the first network device , the method also includes:

When there is a newly added network device to establish a connection with the control device, acquiring topology information of the newly added network device;

Identifying the layer type of the newly added network device according to the topology information of the newly added network device, the topology information of each network device establishing a connection with the control device, and the layer type of each network device establishing a connection with the control device;

Updating the topology information of each network device connected to the control device according to the topology information of the newly added network device;

The layer type of each network device is re-identified according to the layer type of the newly added network device and the updated topology information of each network device establishing a connection with the control device.

Optionally, the layer type of the first network device is a virtual switch or a soft switch, the layer type of the second network device is a top-of-rack switch, the layer type of the third network device is an aggregation layer switch, and the fourth network device The layer type is core layer switch.

Optionally, the connection message includes a handshake message, a heartbeat message or an attribute report message sent by the first network device to the control device.

In a second aspect, a method for identifying a network device in a data center network is provided, which is used for a first network device in the data center network, and the method includes:

Sending a connection message to the control device in the data center network, where the connection message includes the layer identifier of the first network device, so that the control device can identify the layer type of the first network device according to the layer identifier.

In a third aspect, a device for identifying network equipment in a data center network is provided, the device is located in a control device in the data center network, and the device includes:

A receiving unit, configured to receive a connection message sent by a first network device in the data center network, where the connection message includes a layer identifier of the first network device;

a first identifying unit, configured to identify the layer type of the first network device according to the layer identifier;

The second identifying unit is configured to identify the layer type of each network device establishing connection with the control device according to the pre-acquired topology information of each network device establishing connection with the control device and the layer type of the first network device.

Optionally, the second identification unit is also used for:

classifying network devices whose hierarchical type is determined as identified network devices, where the network devices whose hierarchical type is determined include the first network device;

Judging whether there is an unidentified network device to be identified that is connected to the identified network device among the network devices that establish a connection with the control device;

When the network device to be identified exists in each network device that establishes a connection with the control device, identify the network device according to the pre-acquired topology information of each network device that establishes a connection with the control device and the layer type of the identified network device. The layer type of the network device to be identified;

The above steps are repeated until there is no unidentified network device to be identified that is connected to the identified network device among the network devices that establish a connection with the control device.

Optionally, when the layer type of the first network device is a virtual switch, a core layer switch or a soft switch, the second identification unit includes:

The first identification module is configured to identify the level of the second network device connected to the first network device according to the pre-acquired topology information of each network device that establishes a connection with the control device and the level type of the first network device type;

The second identification module is configured to identify an unrecognized third network device connected to the second network device according to the pre-acquired topology information of each network device that establishes a connection with the control device and the layer type of the second network device. The layer type of the network device;

The third identification module is configured to identify the unrecognized fourth network device connected to the third network device according to the pre-acquired topology information of each network device that establishes a connection with the control device and the layer type of the third network device. Hierarchy type of network device.

Optionally, the second identification unit also includes:

The first judging module is used to judge whether the number of unrecognized network devices among the various network devices establishing a connection with the control device is greater than the first preset threshold, and whether the number of the fourth network devices is greater than the second preset threshold. set threshold;

A correction module, configured to be used when the number of unidentified network devices among the network devices establishing a connection with the control device is greater than a first preset threshold, or the number of the fourth network device is greater than a second preset threshold , execute the recognition correction process, the recognition correction process includes:

Determine the number n of the identified third network devices;

According to the pre-acquired topology information of each network device that establishes a connection with the control device, determine whether the number m of the third network device among the network devices connected to the fourth network device is greater than or equal to

When the number m of the third network devices among the network devices connected to the fourth network device is greater than or equal to , correct the layer type of the fourth network device to be the same layer type as that of the second network device.

Optionally, when the layer type of the first network device is a virtual switch, a core layer switch or a soft switch, the second identification unit further includes:

The fourth identification module is configured to identify the level of the second network device connected to the first network device according to the pre-acquired topology information of each network device that establishes a connection with the control device and the level type of the first network device type;

The fifth identification module is configured to identify an unrecognized third network device connected to the second network device according to the pre-acquired topology information of each network device that establishes a connection with the control device and the layer type of the second network device. The layer type of the network device;

A determining module, configured to determine the number n of the identified third network devices;

The second judging module is configured to judge whether the number m of the third network devices among the network devices connected to the fourth network device is greater than or equal to The fourth network device is an unidentified network device that establishes a connection with the third network;

The sixth identification module is used when the number m of the third network devices among the network devices connected to the fourth network device is greater than or equal to , identifying the layer type of the fourth network device as the same layer type as the second network device;

The seventh identification module is used when the number m of the third network devices among the network devices connected to the fourth network device is less than At this time, the layer type of the fourth network device is identified according to the pre-acquired topology information of each network device that establishes a connection with the control device and the layer type of the third network device.

Optionally, the device also includes:

An acquiring unit, configured to acquire topology information of the newly added network device when there is a newly added network device establishing a connection with the control device;

The third identification unit is configured to identify the newly added network device according to the topology information of the newly added network device, the topology information of each network device connected to the control device, and the layer type of each network device connected to the control device. The layer type of the network device;

An update unit, configured to update the topology information of each network device that establishes a connection with the control device according to the topology information of the newly added network device;

The fourth identifying unit is configured to re-identify the layer type of each network device according to the layer type of the newly added network device and the updated topology information of each network device establishing a connection with the control device.

Optionally, the layer type of the first network device is a virtual switch or a soft switch, the layer type of the second network device is a top-of-rack switch, the layer type of the third network device is an aggregation layer switch, and the fourth network device The layer type is core layer switch.

Optionally, the connection message includes a handshake message, a heartbeat message or an attribute report message sent by the first network device to the control device.

In a fourth aspect, there is provided an identification device for a network device in a data center network, the device is located in a first network device in the data center network, and the device includes:

A sending unit, configured to send a connection message to the control device in the data center network, where the connection message includes the layer identifier of the first network device, so that the control device can identify the first network device according to the layer identifier Hierarchy type.

In a fifth aspect, there is provided an identification device for network equipment in a data center network, the device is located in a control device in the data center network, and the device includes: a processor, a memory, and a bus; the bus is used to connect the processor and the A memory, the processor is used to execute the program stored in the memory, and the program includes the method described in any one of the first aspect.

According to the sixth aspect, there is provided an identification device for a network device in a data center network, the device is located in a first network device in the data center network, and the device includes: a processor, a memory, and a bus; the bus is used to connect the processor and the memory, the processor is used to execute the program stored in the memory, and the program includes the method described in the second aspect.

In a seventh aspect, a system for identifying network equipment in a data center network is provided, the system includes a control device and a first network device, and the control device includes the device for identifying network equipment in a data center network as described in any one of the third aspects; The first network device includes the device for identifying network devices in the data center network described in the fourth aspect.

In an eighth aspect, a system for identifying network equipment in a data center network is provided, the system includes a control device and a first network device, and the control device includes the device for identifying network equipment in a data center network as described in the fifth aspect; the first A network device includes the device for identifying network devices in the data center network according to the sixth aspect.

The beneficial effects brought by the technical solution provided by the embodiments of the present invention are:

Embodiments of the present invention provide a method, device, and system for identifying network equipment in a data center network. The method is used in a control device in a data center network. The method includes: receiving a message sent by the first network equipment in the data center network. A connection message, the connection message includes the layer identifier of the first network device; according to the layer identifier, identify the layer type of the first network device; according to the pre-acquired topology of each network device that establishes a connection with the control device Information, as well as the layer type of the first network device, identifies the layer type of each network device that establishes a connection with the control device, so the network device identification method provided by the embodiment of the present invention can be based on the connection message sent by the first network device The layer identifier carried in the , identifies the layer type of the first network device, and does not need to analyze the connection status of the first network device, thus reducing the computational complexity of identifying network devices in the data center network. Network devices The recognition flexibility is high.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings that need to be used in the description of the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present invention. For those skilled in the art, other drawings can also be obtained based on these drawings without creative effort.

FIG. 1 is a schematic diagram of a topology structure of a data center network in the related art;

FIG. 2-1 is a system architecture diagram of a data center network provided by an embodiment of the present invention;

FIG. 2-2 is a flow chart of a method for identifying network devices in a data center network provided by an embodiment of the present invention;

FIG. 3-1 is a flow chart of another method for identifying network devices in a data center network provided by an embodiment of the present invention;

FIG. 3-2 is a schematic diagram of a partial topology structure of a network device in a data center network provided by an embodiment of the present invention;

FIG. 3-3 is a schematic diagram of a partial topology structure of network devices in another data center network provided by an embodiment of the present invention;

3-4 are schematic diagrams of partial topology structures of network devices in another data center network provided by an embodiment of the present invention;

FIG. 4-1 is a flow chart of another method for identifying network devices in a data center network provided by an embodiment of the present invention;

FIG. 4-2 is a schematic diagram of a partial topology structure of another network device in a data center network provided by an embodiment of the present invention;

Fig. 4-3 is a flow chart of a method for identifying and correcting a process provided by an embodiment of the present invention;

FIG. 5 is a flowchart of another method for identifying network devices in a data center network provided by an embodiment of the present invention;

Fig. 6-1 is a schematic structural diagram of an identification device for network equipment in a data center network provided by an embodiment of the present invention;

FIG. 6-2 is a schematic structural diagram of another device for identifying network equipment in a data center network provided by an embodiment of the present invention;

Fig. 6-3 is a schematic structural diagram of a second identification unit provided by an embodiment of the present invention;

Fig. 6-4 is a schematic structural diagram of another second identification unit provided by an embodiment of the present invention;

FIG. 7 is a schematic structural diagram of another device for identifying network equipment in a data center network provided by an embodiment of the present invention;

FIG. 8 is a schematic structural diagram of another device for identifying network equipment in a data center network provided by an embodiment of the present invention;

FIG. 9 is a schematic structural diagram of another apparatus for identifying network equipment in a data center network according to an embodiment of the present invention.

Detailed ways

In order to make the object, technical solution and advantages of the present invention clearer, the implementation manner of the present invention will be further described in detail below in conjunction with the accompanying drawings.

Fig. 1 is a schematic diagram of the topology structure of the data center network in the related art. As shown in Fig. 1, taking the topology structure of the data center network as a tree structure as an example, the tree structure may include a plurality of servers 01 at the bottom, and the The access layer switch connected to the server 01 is also called a top-of-rack switch (English: Top OfRack; abbreviation: TOR) 02, and a convergence layer switch (English: End OfRow; abbreviation: EOR) 03 connected to the top-of-rack switch 02, As well as the core layer switch 04 connected to the aggregation layer switch 03, the switches at different levels are interconnected to provide communication channels for communication between the servers 01. After each network device (including servers and switches at different levels) in the data center network is deployed according to the preset topology, each network device needs to establish a connection with the control plane of the data center network so that the control plane can Each network device is managed and controlled, for example, configuration files are delivered to each network device to realize automatic configuration of network devices, etc.

Figure 2-1 is a system architecture diagram of a data center network provided by an embodiment of the present invention. As shown in Figure 2-1, the data center network can be divided into a control plane and a data plane, wherein the control plane consists of one or more The data plane includes a plurality of network devices 00, wherein the plurality of network devices 00 can be divided into different levels according to different data center network topologies. For example, if the topology of the data center network is a two-layer tree structure, the plurality of network devices can be divided into two types of network devices, for example: access layer switches and aggregation layer switches; if the data The topology of the central network is a three-layer Fat-Tree structure, and the multiple network devices can be divided into three different types of network devices, such as: access layer switches, aggregation layer switches, and core layer switches ; If the topology of the data center network is a three-layer Fat-Tree structure, and a virtual switch or soft switch is installed in the server of the data center network, the virtual switch or soft switch can be used as the first Four-layer extension, at this time, the network device layer types in the data center network can include four types: virtual switches or soft switches, access layer switches, aggregation layer switches, and core layer switches. After the network devices 00 of different layer types establish connections with the control device 10 in the control plane, the control device 10 can identify the layer types of the different network devices 00, so as to issue different configuration files to network devices of different layer types , so as to realize the automatic configuration of network devices in the data center network. For example, in Figure 2-1, the network devices in the oval area have established a connection with the control device 10, and the control device 10 can control the network in the oval area. The device performs identification of the hierarchy type.

Fig. 2-2 is a flowchart of a method for identifying network devices in a data center network provided by an embodiment of the present invention. This method can be applied to the control device 10 shown in Fig. 2-1, as shown in Fig. 2-2 , the method includes:

Step 201. Receive a connection message sent by a first network device in the data center network, where the connection message includes a layer identifier of the first network device.

Step 202: Identify the layer type of the first network device according to the layer identifier.

Step 203: According to the pre-acquired topology information of each network device establishing a connection with the control device and the layer type of the first network device, identify the layer type of each network device establishing a connection with the control device.

To sum up, the embodiments of the present invention provide a method for identifying network devices in a data center network. The control device can quickly identify the first network device according to the level identifier included in the connection message sent by the first network device received. The layer type of the device, and then according to the topology information of each network device and the layer type of the first network device, identify the layer type of each network device that establishes a connection with the control device. This method identifies the layer type of the first network device type, there is no need to analyze the connection status of the first network device, so the computational complexity of identifying the network device in the data center network is reduced, and the identification flexibility of the network device is relatively high.

An embodiment of the present invention provides another method for identifying network devices in a data center network. This method can be applied to the first network device in the data center network. The first network device can be any network device in Figure 2-1 , the method includes:

Send a connection message to the control device in the data center network, where the connection message includes the layer identifier of the first network device, so that the control device can identify the layer type of the first network device according to the layer identifier.

In this embodiment of the present invention, the first network device may be any layer type network device in the data center network. For example, assuming that the layer type of the first network device is a virtual switch, each network device in the data center network When a virtual switch establishes a connection with the control device, the connection message sent by each virtual switch includes the layer identifier of the virtual switch. In the process of establishing a connection between the control device and each network device, it can first identify the layer type of the first network device according to the layer identifier, and then identify the layers of other network devices one by one according to the topology information of each network device and the layer type of the first network device type.

To sum up, the embodiments of the present invention provide a method for identifying network devices in a data center network. The connection message sent by the first network device to the control device may include the layer identifier of the first network device, so the control device can quickly identify the layer type of the first network device according to the layer identification, and then identify the layer type of each network device that establishes a connection with the control device according to the topology information of each network device and the layer type of the first network device, Therefore, when the control device identifies the hierarchical type of the first network device, it does not need to analyze the connection status of the first network device, thus reducing the computational complexity of identifying each network device in the data center network, and the network device Recognition flexibility is high.

Fig. 3-1 is a flowchart of another method for identifying network devices in a data center network provided by an embodiment of the present invention. This method can be applied to the control device 10 shown in Fig. 2-1, as shown in Fig. 3-1 , the method includes:

Step 301. Receive a connection message sent by a first network device in the data center network, where the connection message includes a layer identifier of the first network device.

In the embodiment of the present invention, after each network device in the data center network is deployed, each network device needs to establish a connection with the control plane in the data center network. During the connection establishment process, the first network device sends The connection message sent by the control device in the control plane may include the layer identifier of the first network device, and the layer identifier is used to indicate the layer type of the first network device, that is, the first network device is in the topological structure of the data center network Therefore, the control device can recognize the layer type of the first network device through the layer identifier, and can determine the relative positional relationship between the first network device and other network devices. Wherein, the first network device may be any type of network device, for example, it may be a virtual switch, a soft switch or other network devices of the same type, or it may be a core layer switch or other network devices of the same type. The message may be a connection request message sent by the first network device to the control device, or may be a connection response message or an attribute report message, etc., which is not limited in this embodiment of the present invention.

It should be noted that when the control device establishes a connection with the network device, the control device may actively send a control channel connection request to the network device, or the network device may actively send a control channel connection request to the control device. limited. For the process of establishing a connection between the control device and the network device, reference may be made to related technologies, which will not be described in detail in this embodiment of the present invention.

Step 302: Identify the layer type of the first network device according to the layer identifier.

After receiving the connection message sent by the first network device, the control device can identify the layer type of the first network device according to the layer identifier carried in the connection message. For example, if the first network device is a virtual switch, the connection packet sent by the virtual switch in the data center network to the control device may include the level identifier of the virtual switch, and the control device may The layer identifier included herein identifies the layer type of the first network device as a virtual switch.

Step 303: Classify network devices whose hierarchical type is determined as identified network devices, where the network devices whose hierarchical type is determined include the first network device.

Since the topology structure of the data center network is generally a regular structure, after the control device identifies the layer type of the first network device, it can sequentially identify other network devices connected to the first network device according to the layer type of the first network device tier type. During the process of the control device identifying the hierarchical types of various network devices, in order to determine whether to continue to execute the identification algorithm, the control device may classify the network devices whose hierarchical types have been determined as identified network devices. As an example, Fig. 3-2 is a schematic diagram of a partial topology structure of network devices in a data center network provided by an embodiment of the present invention. As shown in Fig. 3-2, it is assumed that the network devices that establish a connection with the control device 10 include SW1 to SW6 , and the first network device is SW1, after the control device recognizes that the layer type of SW1 is a virtual switch according to the connection message sent by SW1, the identified network devices that the control device can determine include: SW1.

Step 304, judging whether there is an unidentified network device to be identified that is connected to the identified network device among the network devices that establish a connection with the control device.

When the network device to be identified exists among the network devices establishing a connection with the control device, step 305 is performed; when the network device to be identified does not exist among the network devices establishing a connection with the control device, step 306 is performed. In the embodiment of the present invention, in order to improve the judgment efficiency when judging the network device to be recognized, the control device may only judge whether there is an unrecognized network device connected to the most recently recognized network device in each network device. As an example, assume that in Figure 3-2, the control device recognizes that the layer type of the first network device SW1 is a soft switch according to the connection message sent by SW1, and then identifies the network device connected to the SW1 according to the layer type of the SW1. The layer type of SW2, at this time, the layer type of SW2 can be a top-of-rack switch, then the identified network devices divided by the control device at this time can include: SW1 and SW2, because SW2 is the most recently identified network device, the control device is in When judging whether there is a network device to be identified, you can only judge whether there is a network device to be identified that is connected to the SW2 and has not been identified. Since in Figure 3-2, SW3 is connected to SW2, and SW3 is not recognized by the control device, then The control device may determine that there is a network device to be identified: SW3.

Step 305: Identify the layer type of the network device to be identified according to the pre-acquired topology information of each network device establishing a connection with the control device and the layer type of the identified network device.

In the embodiment of the present invention, after the control device establishes a connection with the network device, the control device can obtain topology information of each network device that establishes a connection with the control device through a topology discovery process, wherein, in the topology discovery process, the control device A link layer discovery protocol (English: Link Layer Discovery Protocol; abbreviation: LLDP) message can be sent to each network device that establishes a connection with the control device, and then the information of each network device can be obtained according to the message fed back by each network device. and store the topology information of each network device in a memory in the data center network, wherein the topology information of each network device includes connection relationships between each network device. For example, as shown in Figure 3-2, assuming that in the data center network, the network devices that establish connections with the control device 10 include: SW1 to SW6, then the control device obtains the topology of the network devices SW1 to SW6 through the topology discovery process The information can be shown in Table 1. The connection relationship between various network devices is recorded in the topology information. For example, SW1 is connected to port 0 of SW2 through port 0, and SW2 is connected to port 0 of SW3 through port 1. , SW3 is connected to port 1 of SW3 through port 2 and so on.

Table 1

SW1: Port0-------SW2: Port0 SW2: Port1-------SW3: Port0 SW3: Port2-------SW4: Port1  …

For the network device to be identified: SW3, the control device can identify the layer type of the network device to be identified SW3 according to the topology information shown in Table 1 and the layer type of the identified network device: SW1 is a virtual switch, and SW2 is a top-of-rack switch It is the aggregation layer switch.

Afterwards, the control device can repeatedly execute the above-mentioned steps 303 to 305 until there is no network device to be identified that is connected to the identified network device and has not been identified among the network devices that establish a connection with the control device. Therefore, the embodiment of the present invention The identification method of the provided network equipment is not limited by the network topology structure in its identification process, can flexibly identify network topologies with different hierarchical structures, and improves the flexibility of network equipment identification.

It should be noted that after the control device identifies the layer type of a network device, it can mark the layer type of the network device in the topology information. For example, for the topology shown in Figure 3-2, the control device completes the network After the devices SW1 to SW6 are identified, the hierarchical type of each network device marked in the topology information may be as shown in Table 2, for example, SW1 is marked as a virtual switch, and SW4 is marked as a core layer switch.

Table 2

Step 306, when there is a newly added network device establishing a connection with the control device, acquire topology information of the newly added network device.

In the embodiment of the present invention, since the process of establishing a connection between each network device and the control device in the data center network is not performed synchronously, during the process of the control device identifying each network device that has established a connection with the control device, When a newly added network device establishes a connection with the control device, the control device may obtain topology information of the newly added network device through a topology discovery process. As an example, assume that the partial topology of the data center network is shown in Figure 3-3, and the control device has completed the identification of network devices SW31 to SW35, where SW31 and SW32 are the first network devices, and their layer type is soft For switches, the layer type of SW33 and SW34 is a top-of-rack switch, and the layer type of SW35 is an aggregation layer switch. When a newly added network device SW36 establishes a connection with the control device, the control device may acquire topology information of the SW36, and the topology information may include the connection relationship between SW35 and SW36.

Step 307: According to the topology information of the newly added network device, the topology information of each network device establishing connection with the control device, and the hierarchy type of each network device establishing connection with the control device, identify the new network device Hierarchy type.

After obtaining the topology information of the newly added network device, the control device may identify the layer type of the newly added network device according to the determined layer type of each network device. For example, as shown in Figure 3-3, since the topology information of the network device SW36 includes that SW36 is connected to SW35, and the layer type of the network device SW35 is a convergence layer switch, the control device can determine that the newly added network device SW36 is Core layer switch.

It should be noted that if the layer type of the newly added switch is the same as that of the first network device, when the newly added network device establishes a connection with the control device, the connection message sent to the control device may include The layer identifier of the newly added network device. At this time, the control device can directly identify the layer type of the newly added network device according to the layer identifier.

Step 308 , according to the topology information of the newly added network device, update the topology information of each network device that establishes a connection with the control device.

After the newly added network device establishes a connection with the control device, the control device can update the topology information of each network device connected with the control device in real time according to the obtained topology information of the newly added network device.

Step 309: Re-identify the layer type of each network device according to the layer type of the newly added network device and the updated topology information of each network device establishing a connection with the control device.

After the newly added network device establishes a connection with the control device, the connection between each network device may change, and the hierarchical type of each network device identified based on the topology information before the update may be wrong, so the control device The layer type of each network device may be re-identified according to the layer type of the newly added network device and the updated topology information of each network device establishing a connection with the control device. For the re-identification process, reference may be made to the above steps 303 to 305, which will not be repeated in this embodiment of the present invention.

For example, assuming that as shown in Figure 3-4, the newly added network device is SW32, and before the network device SW32 establishes a connection with the control device, the control device has completed the identification of the network device SW31 and network devices SW33 to SW36, The specific identification results are: the layer type of SW31 is a soft switch, the layer type of SW33 is a top-of-rack switch, the layer type of SW35 is an aggregation layer switch, and the layer types of SW34 and SW36 are core layer switches. After the SW32 establishes a connection with the control device, the control device can identify the network device SW32 as a soft switch according to the layer identification carried in the connection message sent by the SW32, and can obtain the topology of the newly added network device SW32 Information, the SW32 topology information may include: the connection between SW32 and SW34. Further, the control device may re-identify the layer type of the network device SW34 as a top-of-rack switch according to the layer type of the newly added network device SW32: soft switch, and the topology information of the newly added network device SW32.

In practical applications, the control device can periodically identify the layer type of each network device connected to the control device, and continuously re-identify and correct the misidentified network device according to the topology information of the newly added network device, so as to improve In order to control the recognition accuracy of each network device in the data center network when the control device recognizes it.

It should be noted that the order of the steps of the method for identifying network devices in the data center network provided by the embodiment of the present invention can be appropriately adjusted, and the steps can also be increased or decreased according to the situation. Within the technical scope disclosed by the invention, any easily conceivable change method shall be covered within the scope of protection of the present invention, so details are not repeated here.

To sum up, the embodiments of the present invention provide a method for identifying network devices in a data center network. The control device can quickly identify the first network device according to the level identifier included in the connection message sent by the first network device received. The layer type of the device, and then according to the topology information of each network device and the layer type of the first network device, identify the layer type of each network device that establishes a connection with the control device. This method identifies the layer type of the first network device type, there is no need to analyze the connection status of the first network device, so the computational complexity of identifying the network device in the data center network is reduced, and the identification flexibility of the network device is high, and the embodiment of the present invention provides The network device identification method, in the process of identifying network devices in the data center network, is not limited by the network topology structure, and can flexibly identify network devices under different topological structures; in addition, the network device discovery scheme in the related art Only network devices under the complete topology can be identified, but the data center network is gradually improved from the initial incomplete topology to the complete topology during networking, that is, the life cycle of the data center network includes a long The network device identification method provided by the embodiment of the present invention can not only identify the network device under the complete topology structure, but also identify the network device under the incomplete topology structure.

In the embodiment of the present invention, when the layer type of the first network device is a virtual switch, core layer switch or soft switch, the topology of the data center network may include a four-layer topology, assuming that the layer type of the first network device is For the soft switch, at this time, the process for the control device to identify the hierarchical type of each network device in the data center network can be shown in Figure 4-1. The method includes:

Step 401. Receive a connection message sent by a first network device in the data center network, where the connection message includes a layer identifier of the first network device.

As an example, assume that the topology of the data center network is a Fat-tree structure as shown in Figure 4-2, and the first network device is a soft switch SW41. During the process of establishing connections between the network devices SW41 to SW410 and the control device The connection message sent by the first network device SW41 to the control device may include the layer identifier of SW41: soft switch.

Step 402: Identify the layer type of the first network device according to the layer identifier.

The control device receives the connection message sent by each network device, and determines the layer type of the first network device SW41 according to the layer identifier carried in the connection message sent by the first network device: soft switch.

Step 403: Identify the layer type of the second network device connected to the first network device according to the pre-acquired topology information of each network device connected to the control device and the layer type of the first network device.

For example, after the control device establishes a connection with the network devices SW41 to SW410, it can obtain the topology information of the network devices SW41 to SW410 through a topology discovery process, and the topology information includes the connection relationship of the respective network devices SW41 to SW410, After that, the control device can identify the second network device connected to the first network device SW41: the layer type of SW42 according to the topology information and the identified layer type of the first network device SW41: soft switch, the second network device The layer type of SW42 can be a top-of-rack switch.

Step 404: According to the pre-acquired topology information of each network device that establishes a connection with the control device, and the layer type of the second network device, identify the layer of the unrecognized third network device that is connected to the second network device type.

Further, the control device can identify the unrecognized third network device connected to the second network device SW42 according to the layer type of the second network device SW42: the top-of-rack switch: the layer types of SW46 to SW49, the third network The layer types of the devices SW46 to SW49 may be aggregation layer switches.

Step 405, according to the pre-acquired topology information of each network device that establishes a connection with the control device, and the layer type of the third network device, identify the layer of the unidentified fourth network device connected to the third network device type.

The control device may further identify the layer type of an unidentified fourth network device that has a connection relationship with any network device in the third network device SW46 to SW49 according to the determined layer type of the third network device SW46 to SW49, For example, the fourth network device may include SW43 to SW45 and SW410, and the layer type of the fourth network device SW43 to SW45 and SW410 recognized by the control device may be a core layer switch.

Step 406 , judging whether the number of unrecognized network devices among the network devices establishing a connection with the control device is greater than a first preset threshold, and whether the number of the fourth network device is greater than a second preset threshold.

When the number of unrecognized network devices among the network devices establishing connections with the control device is greater than the first preset threshold, or the number of the fourth network devices is greater than the second preset threshold, the control device may determine that Recognize that there may be misidentification among the network devices, and execute step 407; when the number of unrecognized network devices among the network devices that establish a connection with the control device is not greater than the first preset threshold, and the fourth network When the number of devices is greater than the second preset threshold, the control device may determine that the recognition results of the recognized network devices are correct, and end the recognition process.

For example, assuming that the first preset threshold and the second preset threshold are both 2, in the topology shown in Figure 4-2, due to the unrecognized network in each network device establishing a connection with the control device The number of devices is 0, which is less than the first preset threshold, but the number of fourth network devices is 4, which is greater than the second preset threshold: 2, so the control device can determine that there may be Misrecognized network equipment, and perform step 407 to correct it.

Step 407, execute a recognition correction process.

When the number of unrecognized network devices among the network devices establishing a connection with the control device is greater than the first preset threshold, or the number of the fourth network device is greater than the second preset threshold, the control device may determine that It has been determined that there may be misrecognized network devices among the network devices of the layer type, and the recognition and correction process is performed, as shown in Figure 4-3. The recognition and correction process includes:

Step 4071. Determine the number n of identified third network devices.

Wherein, the number n of the identified third network devices refers to the number of third network devices connected to the same second network device. For example, in the topology shown in FIG. 4-2, since the third network devices SW46 to SW49 are all connected to the second network device SW42, the control device can determine that the number of identified third network devices is: n =4.

Step 4072: Determine whether the number m of the third network device among the network devices connected to the fourth network device is greater than or equal to

in, Indicates rounding up, when the number m of the third network device among the network devices connected to the fourth network device is greater than or equal to , execute step 4073; when the number m of the third network devices among the network devices connected to the fourth network device is less than , the recognition correction process ends.

It should be noted that, if the number of the fourth network device among the identified network devices is greater than 1, in the above step 4072, it is necessary to analyze and count the network devices connected to each fourth network device. For example, for the fourth network device SW43, according to the topology information of each network device that establishes a connection with the control device obtained in advance by the control device, it can be known that among the network devices connected to the fourth network device SW43, the number of third network devices m=4, since m is greater than Then the control device can execute step 4073; for the fourth network device SW410, since the SW410 is only connected to SW46, that is, the number of third network devices connected to the fourth network device SW410 is m=1, less than At this time, the control device may determine that the recognition result of the hierarchical type of the fourth network device SW410 is correct, and end the recognition correction process.

Step 4073: Correct the layer type of the fourth network device to be the same layer type as that of the second network device.

When the number m of the third network devices among the network devices connected to the fourth network device is greater than or equal to , the control device may determine that the recognition result of the layer type of the fourth network device is wrong, and correct the layer type of the fourth network device to be the same layer type as that of the second network device. For example, the control device may correct the fourth network device: SW43 to SW45 to be the same type as the second network device SW42, that is, correct the fourth network device SW43 to SW45 to be a top-of-rack switch.

It should be noted that the order of the steps of the method for identifying network devices in the data center network provided by the embodiment of the present invention can be appropriately adjusted, and the steps can also be increased or decreased according to the situation. Within the technical scope disclosed by the invention, any easily conceivable change method shall be covered within the scope of protection of the present invention, so details are not repeated here.

To sum up, the embodiments of the present invention provide a method for identifying network devices in a data center network. The control device can quickly identify the first network device according to the level identifier included in the connection message sent by the first network device received. The layer type of the device, and then according to the topology information of each network device and the layer type of the first network device, identify the layer type of each network device that establishes a connection with the control device. This method identifies the layer type of the first network device type, there is no need to analyze the connection status of the first network device, so the computational complexity of identifying the network device in the data center network is reduced, and the identification flexibility of the network device is relatively high.

In the embodiment of the present invention, when the layer type of the first network device is a virtual switch, core layer switch or soft switch, it means that the topology of the data center network may include a four-layer topology, assuming that the layer type of the first network device It is a soft switch. At this time, the process for the control device to identify the hierarchical type of each network device in the data center network can also be shown in Figure 5. The method includes:

Step 501. Receive a connection message sent by a first network device in the data center network, where the connection message includes a layer identifier of the first network device.

Step 502: Identify the layer type of the first network device according to the layer identifier;

Step 503: Identify the layer type of the second network device connected to the first network device according to the pre-acquired topology information of each network device connected to the control device and the layer type of the first network device.

Step 504: According to the pre-acquired topology information of each network device that establishes a connection with the control device, and the layer type of the second network device, identify the layer of the unidentified third network device connected to the second network device type.

For the specific implementation process of the above step 501 to step 504, reference may be made to step 401 to step 404, which will not be repeated in this embodiment of the present invention.

Step 505. Determine the number n of the identified third network devices.

After the control device recognizes the layer type of the third network device, it may first determine the number n of the recognized third network devices, wherein the number n of the recognized third network devices refers to The number of third network devices of the device. . For example, assuming that in the topology shown in FIG. 4-2, the third network devices identified by the control device are SW46 to SW49, the control device may determine that the number n=4 of the third network devices.

Step 506: According to the pre-acquired topology information of each network device that establishes a connection with the control device, determine whether the number m of the third network device among the network devices connected to the fourth network device is greater than or equal to

Wherein, the fourth network device is an unrecognized network device that establishes a connection with the third network. If the number of the fourth network device is greater than 1, the control device needs to separately determine the number of network devices connected to each fourth network device. Whether the number m of the third network device in the network device is greater than or equal to When the number m of the third network devices among the network devices connected to the fourth device is greater than or equal to , execute step 507; when the number m of the third network devices among the network devices connected to the fourth network device is less than , execute step 508.

For example, as shown in Figure 4-2, the unrecognized network devices that have established connections with the third network SW46 to SW49 include network devices SW43 to SW45 and SW410, then the control device can determine that the fourth network devices are SW43 to SW45 and SW410. SW410. For the fourth network equipment SW43 to SW45, since the SW43 to SW45 respectively establish connections with m=4 third network equipment, the control equipment can perform step 507; for the fourth network equipment SW410, because the network connected to the SW410 The device only includes m=1 third network device SW46, and the control device may execute step 508.

Step 507. Identify the stratum type of the fourth network device as the same stratum type as that of the second network device.

For example, the control device may identify the fourth network device: SW43 to SW45 as the same type as the second network device: SW42, that is, identify the fourth network device SW43 to SW45 as a top-of-rack switch.

Step 508: Identify the layer type of the fourth network device according to the pre-acquired topology information of each network device establishing a connection with the control device and the layer type of the third network device.

When the number m of the third network devices among the network devices connected to the fourth device is greater than or equal to At this time, the control device may identify the layer type of the fourth network device according to the pre-acquired topology information of each network device establishing a connection with the control device and the layer type of the third network device. For example, for SW410, the control device may identify the layer type of the fourth network device SW410 as a core layer switch according to the topology shown in FIG. 4-2 and the layer type of the third network device SW46: aggregation layer switch.

It should be noted that since the Fat-tree structure may include multiple Pods, each Pod includes a certain number of second network devices and third network devices, where the second network devices connected to each third network device are is a second network device located in the same Pod as the third network device. If the number of third network devices included in each Pod is not equal, then in the above step 505, the number n of identified third network devices determined by the control device is also different, that is, each Pod can correspond to a The number n of identified third network devices. Therefore, when identifying the layer type of the fourth network device, it is necessary to determine the Pod corresponding to the Pod according to the Pod where the third network device connected to each fourth network device is located. The number n of identified third network devices.

It should also be noted that the order of the steps of the method for identifying network devices in the data center network provided by the embodiment of the present invention can be appropriately adjusted, and the steps can also be increased or decreased according to the situation. Within the technical scope disclosed in the present invention, any easily conceivable change method shall be covered in the protection scope of the present invention, so details are not repeated here.

To sum up, the embodiments of the present invention provide a method for identifying network devices in a data center network. The control device can quickly identify the first network device according to the level identifier included in the connection message sent by the first network device received. The layer type of the device, and then according to the topology information of each network device and the layer type of the first network device, identify the layer type of each network device that establishes a connection with the control device. This method identifies the layer type of the first network device type, there is no need to analyze the connection status of the first network device, so the computational complexity of identifying the network device in the data center network is reduced, and the identification flexibility of the network device is relatively high.

It should be noted that in practical applications, the operator can configure the corresponding network device identification algorithm in the control device according to the configuration of each server in the data center network. For example, when each server in the data center network is equipped with a virtual switch or a soft switch, the control device can use the network device identification method shown in Figure 4-1 to identify the level of each network device in the data center network. type; when only some servers in the data center network are equipped with virtual switches or soft switches, the control device can use the network device identification method shown in Figure 5 to identify the hierarchical types of each network device in the data center network identify.

It should also be noted that, in each of the embodiments provided by the present invention, when the layer type of the first network device is a virtual switch or a soft switch, the layer type of the second network device may be a top-of-rack switch, and the third network device The layer type of the network device can be an aggregation layer switch, and the layer type of the fourth network device can be a core layer switch; when the layer type of the first network device is a core layer switch, the layer type of the second network device can be an aggregation layer A switch, the layer type of the third network device may be a top-of-rack switch, and the layer type of the fourth network device may be a virtual switch or a soft switch.

It should also be noted that, in each embodiment provided by the present invention, the connection message sent by the first network device to the control device may include a handshake message, a heartbeat message or an attribute report message sent by the first network device to the control device , wherein, the handshake message can be a hello message based on the OpenFlow protocol, and the attribute report message can be an attribute response message (for example, feature_reply or similar message) for responding to an attribute request message (for example, feature_request or similar message), and the attribute report The message may also be another message similar to the type of the attribute response message, which is not limited in this embodiment of the present invention; in addition, in each embodiment provided by the present invention, the layer type of the first network device.

Figure 6-1 is a schematic structural diagram of an identification device for network equipment in a data center network provided by an embodiment of the present invention. The device is located in a control device in the data center network. As shown in Figure 6-1, the device includes:

The receiving unit 601 is configured to receive a connection message sent by a first network device in the data center network, where the connection message includes a layer identifier of the first network device.

The first identifying unit 602 is configured to identify the layer type of the first network device according to the layer identifier.

The second identification unit 603 is configured to identify the layer type of each network device that establishes a connection with the control device according to the pre-acquired topology information of each network device that establishes a connection with the control device and the layer type of the first network device .

To sum up, the embodiment of the present invention provides an identification device for a network device in a data center network. The device is located in a control device in the data center network, and the control device can receive a connection message sent by the first network device. The layer identification included in the network device quickly identifies the layer type of the first network device, and then identifies the layer of each network device that establishes a connection with the control device according to the topology information of each network device and the layer type of the first network device type, this method does not need to analyze the connection status of the first network device when identifying the layer type of the first network device, thus reducing the computational complexity when identifying network devices in the data center network, and the identification of network devices High flexibility.

Figure 6-2 is a schematic structural diagram of another device for identifying network equipment in a data center network provided by an embodiment of the present invention. The device is located in the control device in the data center network. As shown in Figure 6-2, the device includes :

The receiving unit 601 is configured to receive a connection message sent by a first network device in the data center network, where the connection message includes a layer identifier of the first network device.

The first identifying unit 602 is configured to identify the layer type of the first network device according to the layer identifier.

The second identification unit 603 is configured to identify the layer type of each network device that establishes a connection with the control device according to the pre-acquired topology information of each network device that establishes a connection with the control device and the layer type of the first network device .

The obtaining unit 604 is configured to obtain topology information of the newly added network device when there is a newly added network device establishing a connection with the control device.

The third identifying unit 605 is configured to identify the newly added network device according to the topology information of the newly added network device, the topology information of each network device establishing a connection with the control device, and the layer type of each network device establishing a connection with the control device. The layer type of the added network device.

An updating unit 606, configured to update the topology information of each network device that establishes a connection with the control device according to the topology information of the newly added network device.

The fourth identifying unit 607 is configured to re-identify the layer type of each network device according to the layer type of the newly added network device and the updated topology information of each network device establishing a connection with the control device.

Optionally, the second identification unit 603 is also used to:

classifying network devices whose hierarchical type is determined as identified network devices, where the network devices whose hierarchical type is determined include the first network device;

Judging whether there is an unidentified network device to be identified that is connected to the identified network device among the network devices that establish a connection with the control device;

When the network device to be identified exists in each network device that establishes a connection with the control device, identify the network device according to the pre-acquired topology information of each network device that establishes a connection with the control device and the layer type of the identified network device. The layer type of the network device to be identified;

The above steps are repeated until there is no unidentified network device to be identified that is connected to the identified network device among the network devices that establish a connection with the control device.

Optionally, when the layer type of the first network device is a virtual switch, a core layer switch or a soft switch, as shown in FIG. 6-3, the second identification unit 603 includes:

The first identification module 6031 is configured to identify the second network device connected to the first network device according to the pre-acquired topology information of each network device that establishes a connection with the control device and the layer type of the first network device Hierarchy type.

The second identification module 6032 is configured to identify the unrecognized second network device that is connected to the second network device according to the pre-acquired topology information of each network device that establishes a connection with the control device and the layer type of the second network device Three hierarchical types of network devices.

The third identifying module 6033 is configured to identify the unrecognized third network device that is connected to the third network device according to the pre-acquired topology information of each network device that establishes a connection with the control device and the layer type of the third network device Four hierarchical types of network devices.

Optionally, as shown in Figure 6-3, the second identification unit may also include:

The first judging module 6034 is used to judge whether the number of unrecognized network devices among the network devices establishing connections with the control device is greater than the first preset threshold, and whether the number of the fourth network device is greater than the second preset threshold.

Correction module 6035, configured to when the number of unrecognized network devices among the network devices establishing a connection with the control device is greater than the first preset threshold, or the number of the fourth network device is greater than the second preset threshold , execute the recognition correction process, the recognition correction process includes:

Determine the number n of the identified third network devices;

According to the pre-acquired topology information of each network device that establishes a connection with the control device, determine whether the number m of the third network device among the network devices connected to the fourth network device is greater than or equal to

When the number m of the third network devices among the network devices connected to the fourth network device is greater than or equal to , correct the layer type of the fourth network device to be the same layer type as that of the second network device.

Optionally, when the layer type of the first network device is a virtual switch, a core layer switch or a soft switch, FIG. 6-4 is a schematic structural diagram of another second identification unit 603 provided by an embodiment of the present invention, as shown in 6-4, the second identification unit 603 includes:

The fourth identification module 6036 is configured to identify the second network device connected to the first network device according to the pre-acquired topology information of each network device that establishes a connection with the control device and the layer type of the first network device Hierarchy type.

The fifth identifying module 6037 is configured to identify the unrecognized unrecognized second network device connected to the second network device according to the pre-acquired topology information of each network device that establishes a connection with the control device and the layer type of the second network device. 3. Hierarchical types of network equipment;

A determining module 6038, configured to determine the number n of the identified third network devices.

The second judging module 6039 is configured to judge whether the number m of the third network devices among the network devices connected to the fourth network device is greater than or equal to The fourth network device is an unidentified network device that establishes a connection with the third network.

The sixth identification module 6040 is used for when the number m of the third network devices among the network devices connected to the fourth network device is greater than or equal to , identify the layer type of the fourth network device as the same layer type as the second network device.

The seventh identification module 6041 is used for when the number m of the third network devices among the network devices connected to the fourth network device is less than At this time, the layer type of the fourth network device is identified according to the pre-acquired topology information of each network device that establishes a connection with the control device and the layer type of the third network device.

Optionally, the layer type of the first network device is a virtual switch or a soft switch, the layer type of the second network device is a top-of-rack switch, the layer type of the third network device is an aggregation layer switch, and the fourth network device The layer type is core layer switch.

Optionally, the connection message includes a handshake message, a heartbeat message or an attribute report message sent by the first network device to the control device.

To sum up, the embodiment of the present invention provides an identification device for a network device in a data center network. The device is located in a control device in the data center network, and the control device can receive a connection message sent by the first network device. The layer identification included in the network device quickly identifies the layer type of the first network device, and then identifies the layer of each network device that establishes a connection with the control device according to the topology information of each network device and the layer type of the first network device type, this method does not need to analyze the connection status of the first network device when identifying the layer type of the first network device, thus reducing the computational complexity when identifying network devices in the data center network, and the identification of network devices High flexibility.

FIG. 7 is a schematic structural diagram of another device for identifying network equipment in a data center network provided by an embodiment of the present invention. The device is located in the first network device in the data center network. As shown in FIG. 7 , the device includes:

The sending unit 701 is configured to send a connection message to the control device in the data center network, where the connection message includes the layer identifier of the first network device, so that the control device can identify the first network device according to the layer identifier tier type.

Fig. 8 is a schematic structural diagram of another device for identifying network equipment in a data center network provided by an embodiment of the present invention. The device is located in a control device in a data center network. As shown in Fig. 8 , the device includes: at least one A processor 801 (such as a CPU), at least one network interface 802 or other communication interfaces, a memory 803, and at least one communication bus 804 are used to implement communication between these devices. The processor 801 is used to execute executable modules, such as computer programs, stored in the memory 803 . The memory 803 may include a high-speed random access memory (RAM: Random Access Memory), and may also include a non-volatile memory (non-volatile memory), such as at least one disk memory. Through at least one network interface 802 (which may be wired or wireless), the communication connection between the identification device of the network equipment in the data center network and at least one other network element can be realized, and the Internet, wide area network, local network, metropolitan area network, etc. can be used.

In some implementations, the memory 803 stores a program 8031, the program 8031 can be executed by the processor 801, and the program 8031 includes:

Receive a connection message sent by a first network device in the data center network, where the connection message includes a layer identifier of the first network device;

Identify the layer type of the first network device according to the layer identifier;

According to the pre-acquired topology information of each network device that establishes a connection with the control device, and the layer type of the first network device, identify the layer type of each network device that establishes a connection with the control device.

Optionally, identifying the layer type of each network device establishing a connection with the control device according to the pre-acquired topology information of each network device establishing a connection with the control device and the layer type of the first network device, including:

classifying network devices whose hierarchical type is determined as identified network devices, where the network devices whose hierarchical type is determined include the first network device;

Judging whether there is an unidentified network device to be identified that is connected to the identified network device among the network devices that establish a connection with the control device;

When the network device to be identified exists in each network device that establishes a connection with the control device, identify the network device according to the pre-acquired topology information of each network device that establishes a connection with the control device and the layer type of the identified network device. The layer type of the network device to be identified;

The above steps are repeated until there is no unidentified network device to be identified that is connected to the identified network device among the network devices that establish a connection with the control device.

Optionally, when the layer type of the first network device is a virtual switch, a core layer switch or a soft switch, according to the pre-acquired topology information of each network device that establishes a connection with the control device, and the first network device The layer type of the network device identifies the layer type of each network device that establishes a connection with the control device, including:

Identifying the layer type of the second network device connected to the first network device according to the pre-acquired topology information of each network device that establishes a connection with the control device and the layer type of the first network device;

identifying the layer type of an unrecognized third network device connected to the second network device according to the pre-acquired topology information of each network device establishing a connection with the control device and the layer type of the second network device;

According to the pre-acquired topology information of each network device connected to the control device and the layer type of the third network device, identify the layer type of the unrecognized fourth network device connected to the third network device.

Optionally, identify an unidentified fourth network connected to the third network device according to the pre-acquired topology information of each network device that establishes a connection with the control device and the layer type of the third network device After the hierarchical type of the device, the method also includes:

judging whether the number of unrecognized network devices among the network devices establishing a connection with the control device is greater than a first preset threshold, and whether the number of the fourth network device is greater than a second preset threshold;

When the number of unrecognized network devices among the network devices establishing a connection with the control device is greater than the first preset threshold, or the number of the fourth network device is greater than the second preset threshold, an identification correction process is performed , the identification correction process includes:

Determine the number n of the identified third network devices;

According to the pre-acquired topology information of each network device that establishes a connection with the control device, determine whether the number m of the third network device among the network devices connected to the fourth network device is greater than or equal to

When the number m of the third network devices among the network devices connected to the fourth network device is greater than or equal to , correct the layer type of the fourth network device to be the same layer type as that of the second network device.

Optionally, when the layer type of the first network device is a virtual switch, a core layer switch or a soft switch, according to the pre-acquired topology information of each network device that establishes a connection with the control device, and the first network device The layer type of the network device identifies the layer type of each network device that establishes a connection with the control device, including:

Identifying the layer type of the second network device connected to the first network device according to the pre-acquired topology information of each network device that establishes a connection with the control device and the layer type of the first network device;

identifying the layer type of an unrecognized third network device connected to the second network device according to the pre-acquired topology information of each network device establishing a connection with the control device and the layer type of the second network device;

Determine the number n of the identified third network devices;

According to the pre-acquired topology information of each network device that establishes a connection with the control device, determine whether the number m of the third network device among the network devices connected to the fourth network device is greater than or equal to The fourth network device is an unidentified network device that establishes a connection with the third network;

When the number m of the third network devices among the network devices connected to the fourth network device is greater than or equal to , identifying the layer type of the fourth network device as the same layer type as the second network device;

When the number m of the third network devices among the network devices connected to the fourth network device is less than At this time, the layer type of the fourth network device is identified according to the pre-acquired topology information of each network device that establishes a connection with the control device and the layer type of the third network device.

Optionally, after identifying the layer type of each network device that establishes a connection with the control device according to the pre-acquired topology information of each network device that establishes a connection with the control device and the layer type of the first network device , the method also includes:

When there is a newly added network device to establish a connection with the control device, acquiring topology information of the newly added network device;

Identifying the layer type of the newly added network device according to the topology information of the newly added network device, the topology information of each network device establishing a connection with the control device, and the layer type of each network device establishing a connection with the control device;

Updating the topology information of each network device connected to the control device according to the topology information of the newly added network device;

The layer type of each network device is re-identified according to the layer type of the newly added network device and the updated topology information of each network device establishing a connection with the control device.

Optionally, the layer type of the first network device is a virtual switch or a soft switch, the layer type of the second network device is a top-of-rack switch, the layer type of the third network device is an aggregation layer switch, and the fourth network device The layer type is core layer switch.

Optionally, the connection message includes a handshake message, a heartbeat message or an attribute report message sent by the first network device to the control device.

To sum up, the embodiment of the present invention provides an identification device for a network device in a data center network, and the control device can quickly identify the first network device according to the level identifier included in the received connection message sent by the first network device. The layer type of the device, and then according to the topology information of each network device and the layer type of the first network device, identify the layer type of each network device that establishes a connection with the control device. This method identifies the layer type of the first network device type, there is no need to analyze the connection status of the first network device, so the computational complexity of identifying the network device in the data center network is reduced, and the identification flexibility of the network device is relatively high.

FIG. 9 is a schematic structural diagram of another device for identifying network equipment in a data center network provided by an embodiment of the present invention. The device is located in a control device in a data center network. As shown in FIG. 9 , the device includes: the device includes : including at least one processor 901 (such as a CPU), at least one network interface 902 or other communication interfaces, a memory 903, and at least one communication bus 904, for realizing connection and communication between these devices. The processor 901 is used to execute executable modules, such as computer programs, stored in the memory 903 . The memory 903 may include a high-speed random access memory (RAM: Random Access Memory), and may also include a non-volatile memory (non-volatile memory), such as at least one disk memory. The communication connection between the identification device of the network equipment in the data center network and at least one other network element is realized through at least one network interface 902 (which may be wired or wireless), and the Internet, wide area network, local network, metropolitan area network, etc. can be used.

In some implementations, the memory 903 stores a program 9031, and the program 9031 can be executed by the processor 901. The program 9031 includes:

Sending a connection message to the control device in the data center network, where the connection message includes the layer identifier of the first network device, so that the control device can identify the layer type of the first network device according to the layer identifier.

An embodiment of the present invention provides a network device identification system in a data center network, the system includes a control device and a first network device;

The control device includes an identification device that may include network devices in the data center network as shown in any one of Figures 6-1 to 6-4;

The first network device may include an identification device for a network device in the data center network as shown in FIG. 7 .

An embodiment of the present invention provides another network device identification system in a data center network, the system includes a control device and a first network device;

The control device may include the device for identifying network devices in the data center network shown in FIG. 8 ; the first network device may include the device for identifying network devices in the data center network shown in FIG. 9 .

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

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection of the present invention. within range.

Claims (19)

1. A method for identifying network equipment in a data center network is used for control equipment in the data center network, and the method comprises the following steps:

receiving a connection message sent by first network equipment in the data center network, wherein the connection message comprises a hierarchical identifier of the first network equipment;

identifying a hierarchy type of the first network device according to the hierarchy identification;

and identifying the hierarchy type of each network device connected with the control device according to the pre-acquired topology information of each network device connected with the control device and the hierarchy type of the first network device.

2. The method according to claim 1, wherein the identifying, according to the topology information of each network device that establishes connection with the control device and the hierarchy type of the first network device, the hierarchy type of each network device that establishes connection with the control device comprises:

dividing the hierarchy type-determined network devices into identified network devices, the hierarchy type-determined network devices including the first network device;

judging whether network equipment to be identified which is connected with the identified network equipment and is not identified exists in each network equipment which is connected with the control equipment;

when the network equipment to be identified exists in each network equipment which is connected with the control equipment, identifying the hierarchy type of the network equipment to be identified according to the pre-acquired topology information of each network equipment which is connected with the control equipment and the hierarchy type of the identified network equipment;

and repeating the steps until the network equipment to be identified which is connected with the identified network equipment and is not identified does not exist in each network equipment which is connected with the control equipment.

3. The method of claim 1, wherein when the hierarchy type of the first network device is a virtual switch, a core layer switch, or a soft switch, the identifying the hierarchy type of each network device connected to the control device according to the topology information of each network device connected to the control device and the hierarchy type of the first network device, which are acquired in advance, comprises:

identifying the hierarchy type of second network equipment connected with the first network equipment according to the pre-acquired topology information of each network equipment connected with the control equipment and the hierarchy type of the first network equipment;

identifying the hierarchy type of third network equipment which is connected with the second network equipment and is not identified according to the topology information of each network equipment which is acquired in advance and is connected with the control equipment and the hierarchy type of the second network equipment;

and identifying the hierarchy type of a fourth network device which is connected with the third network device and is not identified according to the topology information of each network device which is acquired in advance and is connected with the control device and the hierarchy type of the third network device.

4. The method according to claim 3, wherein after identifying a hierarchy type of a fourth network device that is connected to the third network device and is not identified, based on topology information of each network device that establishes a connection with the control device acquired in advance and the hierarchy type of the third network device, the method further comprises:

judging whether the number of unidentified network devices in each network device which establishes connection with the control device is larger than a first preset threshold value or not, and whether the number of fourth network devices is larger than a second preset threshold value or not;

when the number of unrecognized network devices among the network devices that establish connection with the control device is greater than a first preset threshold, or the number of fourth network devices is greater than a second preset threshold, performing a recognition correction process, where the recognition correction process includes:

determining the number n of the identified third network devices;

judging whether the number m of the third network devices in the network devices connected with the fourth network device is greater than or equal to the number m of the third network devices in the network devices connected with the fourth network device according to the pre-acquired topology information of each network device connected with the control deviceWherein,represents rounding up;

when the number m of the third network devices in the network devices connected with the fourth network device is greater than or equal toAnd correcting the hierarchy type of the fourth network device to be the same as the hierarchy type of the second network device.

5. The method of claim 1, wherein when the hierarchy type of the first network device is a virtual switch, a core layer switch, or a soft switch, the identifying the hierarchy type of each network device connected to the control device according to the topology information of each network device connected to the control device and the hierarchy type of the first network device, which are acquired in advance, comprises:

identifying the hierarchy type of second network equipment connected with the first network equipment according to the pre-acquired topology information of each network equipment connected with the control equipment and the hierarchy type of the first network equipment;

identifying the hierarchy type of third network equipment which is connected with the second network equipment and is not identified according to the topology information of each network equipment which is acquired in advance and is connected with the control equipment and the hierarchy type of the second network equipment;

determining the number n of the identified third network devices;

judging whether the number m of the third network devices in the network devices connected with the fourth network device is greater than or equal to the number m of the third network devices in the network devices connected with the fourth network device according to the pre-acquired topology information of each network device connected with the control deviceThe fourth network device is a network device which is connected with the third network and is not identified;

when the number m of the third network devices in the network devices connected with the fourth network device is greater than or equal toIdentifying a hierarchy type of the fourth network device as the same hierarchy type as the second network device;

when the number m of the third network devices in the network devices connected with the fourth network device is less thanAnd then, identifying the hierarchy type of the fourth network device according to the topology information of each network device which is acquired in advance and is connected with the control device and the hierarchy type of the third network device.

6. The method according to any one of claims 1 to 5, wherein after identifying the hierarchy type of each network device that establishes connection with the control device according to the topology information of each network device that establishes connection with the control device, which is acquired in advance, and the hierarchy type of the first network device, the method further comprises:

when the newly added network equipment is connected with the control equipment, acquiring the topology information of the newly added network equipment;

identifying the hierarchy type of the newly added network equipment according to the topology information of the newly added network equipment, the topology information of each network equipment which is connected with the control equipment and the hierarchy type of each network equipment which is connected with the control equipment;

updating the topology information of each network device connected with the control device according to the topology information of the newly added network device;

and re-identifying the hierarchy type of each network device according to the hierarchy type of the newly added network device and the updated topology information of each network device which is connected with the control device.

7. The method of claim 3 or 5, wherein the first network device is a virtual switch or a soft switch, the second network device is a top-of-rack switch, the third network device is a convergence layer switch, and the fourth network device is a core layer switch.

8. The method according to any one of claims 1 to 5,

the connection packet includes a handshake message, a heartbeat message, or an attribute report message sent by the first network device to the control device.

9. A method for identifying a network device in a data center network, the method being used for a first network device in the data center network, the method comprising:

and sending a connection message to a control device in the data center network, wherein the connection message comprises a hierarchy identifier of the first network device, so that the control device can identify the hierarchy type of the first network device according to the hierarchy identifier.

10. An apparatus for identifying a network device in a data center network, the apparatus being located in a control device in the data center network, the apparatus comprising:

a receiving unit, configured to receive a connection packet sent by a first network device in the data center network, where the connection packet includes a hierarchical identifier of the first network device;

a first identification unit, configured to identify a hierarchy type of the first network device according to the hierarchy identifier;

and the second identification unit is used for identifying the hierarchy type of each network device which is connected with the control device according to the topology information of each network device which is connected with the control device and is acquired in advance and the hierarchy type of the first network device.

11. The apparatus of claim 10, wherein the second identifying unit is further configured to:

dividing the hierarchy type-determined network devices into identified network devices, the hierarchy type-determined network devices including the first network device;

judging whether network equipment to be identified which is connected with the identified network equipment and is not identified exists in each network equipment which is connected with the control equipment;

when the network equipment to be identified exists in each network equipment which is connected with the control equipment, identifying the hierarchy type of the network equipment to be identified according to the pre-acquired topology information of each network equipment which is connected with the control equipment and the hierarchy type of the identified network equipment;

and repeating the steps until the network equipment to be identified which is connected with the identified network equipment and is not identified does not exist in each network equipment which is connected with the control equipment.

12. The apparatus of claim 10, wherein when the hierarchical type of the first network device is a virtual switch, a core layer switch, or a soft switch, the second identifying unit comprises:

the first identification module is used for identifying the hierarchy type of second network equipment connected with the first network equipment according to the topology information of each network equipment which is acquired in advance and is connected with the control equipment and the hierarchy type of the first network equipment;

the second identification module is used for identifying the hierarchy type of third network equipment which is connected with the second network equipment and is not identified according to the topology information of each network equipment which is acquired in advance and is connected with the control equipment and the hierarchy type of the second network equipment;

and the third identification module is used for identifying the hierarchy type of a fourth network device which is connected with the third network device and is not identified according to the topology information of each network device which is connected with the control device and is acquired in advance and the hierarchy type of the third network device.

13. The apparatus of claim 12, wherein the second identification unit further comprises:

the first judgment module is used for judging whether the number of unidentified network devices in each network device which establishes connection with the control device is larger than a first preset threshold value or not and whether the number of the fourth network devices is larger than a second preset threshold value or not;

a correction module, configured to execute a recognition correction process when the number of unrecognized network devices in the network devices that establish connection with the control device is greater than a first preset threshold, or the number of fourth network devices is greater than a second preset threshold, where the recognition correction process includes:

determining the number n of the identified third network devices;

judging whether the number m of the third network devices in the network devices connected with the fourth network device is greater than or equal to the number m of the third network devices in the network devices connected with the fourth network device according to the pre-acquired topology information of each network device connected with the control deviceWherein,represents rounding up;

when the number m of the third network devices in the network devices connected with the fourth network device is greater than or equal toAnd correcting the hierarchy type of the fourth network device to be the same as the hierarchy type of the second network device.

14. The apparatus of claim 10, wherein when the hierarchical type of the first network device is a virtual switch, a core layer switch, or a soft switch, the second identifying unit further comprises:

a fourth identification module, configured to identify, according to topology information of each network device that establishes a connection with the control device and a hierarchy type of the first network device, a hierarchy type of a second network device that is connected with the first network device;

a fifth identification module, configured to identify, according to topology information of each network device that is acquired in advance and that establishes connection with the control device, and a hierarchy type of the second network device, a hierarchy type of a third network device that is connected to the second network device and that is not identified;

a determining module, configured to determine the number n of the identified third network devices;

a second judging module, configured to judge, according to topology information of each network device that establishes a connection with the control device and that is obtained in advance, whether or not the number m of the third network devices in the network devices connected to the fourth network device is greater than or equal toThe fourth network device is a network device which is connected with the third network and is not identified;

a sixth identification module, configured to identify the network device to which the fourth network device is connectedThe number m of the third network devices is greater than or equal toIdentifying a hierarchy type of the fourth network device as the same hierarchy type as the second network device;

a seventh identifying module, configured to, when the number m of the third network devices in the network devices connected to the fourth network device is smaller thanAnd then, identifying the hierarchy type of the fourth network device according to the topology information of each network device which is acquired in advance and is connected with the control device and the hierarchy type of the third network device.

15. The apparatus of any one of claims 10 to 14, further comprising:

the acquisition unit is used for acquiring the topology information of the newly added network equipment when the newly added network equipment is connected with the control equipment;

a third identification unit, configured to identify a hierarchy type of the newly added network device according to topology information of the newly added network device, topology information of each network device that establishes a connection with the control device, and a hierarchy type of each network device that establishes a connection with the control device;

the updating unit is used for updating the topology information of each network device which is connected with the control device according to the topology information of the newly added network device;

and a fourth identifying unit, configured to re-identify the hierarchy type of each network device according to the hierarchy type of the newly added network device and the updated topology information of each network device that establishes a connection with the control device.

16. The apparatus of claim 12 or 14, wherein the first network device is a virtual switch or a soft switch, the second network device is a top-of-rack switch, the third network device is a convergence layer switch, and the fourth network device is a core layer switch.

17. The apparatus according to any one of claims 10 to 14,

the connection packet includes a handshake message, a heartbeat message, or an attribute report message sent by the first network device to the control device.

18. An apparatus for identifying network devices in a data center network, the apparatus being located in a first network device in the data center network, the apparatus comprising:

a sending unit, configured to send a connection packet to a control device in the data center network, where the connection packet includes a hierarchical identifier of the first network device, so that the control device identifies a hierarchical type of the first network device according to the hierarchical identifier.

19. A system for identifying network devices in a data center network, the system comprising: a control device and a first network device;

the control device comprises identification means of a network device in the data centre network according to any one of claims 10 to 17;

the first network device comprises the identification means of a network device in a data center network of claim 18.