CN111431789A

CN111431789A - Multi-data center interconnection communication method and DCI equipment

Info

Publication number: CN111431789A
Application number: CN202010287478.2A
Authority: CN
Inventors: 何伟东
Original assignee: Beijing Star Net Ruijie Networks Co Ltd
Current assignee: Beijing Star Net Ruijie Networks Co Ltd
Priority date: 2020-04-13
Filing date: 2020-04-13
Publication date: 2020-07-17

Abstract

The method comprises the steps that a first DCI device maps a first VNI of a source data center in a first VX L AN message to a public VNI to obtain a second VX L AN message, the second DCI device forwards a third VX L AN message obtained by mapping the public VNI in the second VX L AN to a second VNI of a target data center to obtain a second VTEP device, the second VTEP device forwards a V L AN message obtained by de-encapsulating the third VX L AN message to a target host, and therefore when the VX L AN message crossing the data centers is forwarded by the public VNI, the data centers do not need to distribute the same VNI according to tenants, and the data centers can independently distribute tenant resources, so that the flexibility of data center deployment and planning is improved, and the difficulty of cross-data center interconnection is reduced.

Description

Multi-data center interconnection communication method and DCI equipment

Technical Field

The present application relates to the field of network communication technologies, and in particular, to a multi-data center interconnection communication method and DCI equipment.

Background

When a plurality of data centers are interconnected, the current implementation scheme requires that Virtual extended local network identifiers (VNIs) allocated by the same tenant (Virtual machines with the same gateway address) in all the data centers are the same, otherwise, the interworking between the two-layer traffic and the three-layer traffic cannot be realized.

However, in this deployment manner, resources among multiple data centers need to be uniformly allocated and cannot be changed at will, and all data centers plan the same VNI uniformly according to tenants, so that difficulty in data center planning is increased in a phase-changing manner. For example, a tenant is newly added in a certain data center, and the planned allocation VNI of the tenant is 100 to 200, then all data centers need to consider the resource allocation situation of the tenant in different data centers, so that the VNI reserved for all data centers is 100 to 200, which increases the difficulty of planning the data centers. On the other hand, if other data centers do not reserve resources for them, when the interconnection of multiple data centers is implemented, resources allocated by tenants need to be re-planned and allocated, which not only increases the difficulty of operation and maintenance, but also causes user service interruption, which is unacceptable.

Therefore, in the existing implementation scheme of interconnection of multiple data centers, the defects of poor flexibility of data center deployment and resource planning, high difficulty of interconnection across data centers and the like exist.

Disclosure of Invention

The embodiment of the application provides a multi-data center interconnection communication method and DCI equipment, which are used for improving the flexibility of data center deployment and resource planning and reducing the difficulty of cross-data center interconnection.

In a first aspect, an embodiment of the present application provides a multi-data center interconnection communication method, which is applied to a multi-data center interconnection communication system; the DCI equipment is VTEP equipment connected with other data centers; the first DCI equipment, the first VTEP equipment and the source host are located in a source data center, the second DCI equipment, the second VTEP equipment and the destination host are located in a destination data center, and the method comprises the following steps:

the first DCI equipment receives a first virtual extensible local area network VX L AN message sent by the first VTEP equipment, wherein the first VX L AN message is a VX L AN message obtained by encapsulating a virtual local area network V L AN message which is sent by a source host and used for visiting the destination host by the first VTEP equipment, the first VX L AN message comprises address information of the destination host and a first VNI, and the first VNI is a private VNI of the source data center;

the first DCI equipment maps a first VNI in the first VX L AN message to a public VNI to obtain a second VX L AN message corresponding to the first VX L AN message, wherein the second VX L AN message comprises the public VNI and the address information of the target host;

the first DCI device obtains stored address forwarding table information, forwards the second VX L AN message to the second DCI device based on the address forwarding table information, so that the second DCI device forwards a third VX L AN message corresponding to the second VX L AN message to the second VTEP device, and the second VTEP device forwards a V L AN message obtained after decapsulating the third VX L AN message to the destination host to realize the interconnection communication between the source host and the destination host, wherein the address forwarding table information comprises the public VNI and address information of all hosts located in the destination data center, the third VX L AN message is a VN L AN message which is obtained after the second DCI device maps the public VNI in the second VX L AN message to the second VNI and comprises the address information of the second VNI and the destination host, and the second VNI is a private VNI of the destination data center.

In one possible design, before the first DCI device receives the first VX L AN message sent by the first VTEP device, the method further includes:

and the first DCI equipment receives and stores the address forwarding table entry information sent by the second DCI equipment.

In one possible design, forwarding, by the first DCI device, the second VX L AN packet to the second DCI device based on the address forwarding entry information includes:

the first DCI equipment finds out a first VX L AN tunnel of which the entry outlet points to the second DCI equipment based on the address forwarding entry information;

and the first DCI equipment forwards the second VX L AN message to the second DCI equipment through the first VX L AN tunnel.

In one possible design, before the first DCI device maps a first VNI in the first VX L AN message to a common VNI, the method further comprises:

and the first DCI equipment receives a routing message sent by the second DCI equipment, wherein the routing message is used for notifying that the VNI of VX L AN to which AN Ethernet virtual private network EVPN routing protocol of the second DCI equipment belongs of the first DCI equipment is the public VNI.

In one possible design, the address information of all hosts in the destination data center includes: the method comprises the following steps of one or more of media access control address (MAC) information, Address Resolution Protocol (ARP) information, neighbor discovery protocol (ND) information, internet protocol address (IP) routing prefix information and Ethernet Segment (ES) multi-homing information.

In a second aspect, an embodiment of the present application provides a first DCI device, where the first DCI device is applied to a multi-data center interconnected communication system; the DCI equipment is VTEP equipment connected with other data centers; the first DCI equipment, the first VTEP equipment and the source host are positioned in a source data center, and the second DCI equipment, the second VTEP equipment and the destination host are positioned in a destination data center; wherein the first DCI device comprises:

the receiving unit is used for receiving a first VX L AN message sent by the first VTEP device, wherein the first VX L AN message is a VX L AN message obtained by encapsulating a V L AN message which is sent by a source host and used for accessing the destination host by the first VTEP device, the first VX L AN message comprises address information of the destination host and a first VNI, and the first VNI is a private VNI of the source data center;

the processing unit is used for mapping a first VNI in the first VX L AN message to a public VNI to obtain a second VX L AN message corresponding to the first VX L AN message, wherein the second VX L AN message comprises the public VNI and the address information of the target host;

a forwarding unit, configured to acquire stored address forwarding entry information, forward the second VX L AN packet to the second DCI device based on the address forwarding entry information, so that the second DCI device forwards a third VX L AN packet corresponding to the second VX L AN packet to the second VTEP device, and the second VTEP device forwards a V L AN packet obtained after decapsulating the third VX L AN packet to the destination host to implement the interconnection communication between the source host and the destination host, where the address forwarding entry information includes the public VNI and address information of all hosts located in the destination data center, the third VX L AN packet is a vn L AN packet obtained by the second DCI device mapping a public VNI in the second VX L AN packet to a second VNI and including address information of the second VNI and the destination host, and the second VX is a private VNI of the destination data center.

In one possible design, the receiving unit is further configured to:

and receiving and storing the address forwarding table item information sent by the second DCI equipment.

In one possible design, the forwarding unit is further configured to:

based on the address forwarding table entry information, finding a first VX L AN tunnel of which the table entry outlet points to the second DCI equipment;

and forwarding the second VX L AN message to the second DCI equipment through the first VX L AN tunnel.

In one possible design, the receiving unit is further configured to:

and receiving a routing message sent by the second DCI equipment, wherein the routing message is used for notifying the first DCI equipment that the VNI of the VX L AN to which the Ethernet virtual private network EVPN routing protocol of the second DCI equipment belongs is the public VNI.

In a third aspect, an embodiment of the present application provides a DCI device, where the DCI device is applied to a multi-data center interconnected communication system; the DCI equipment is VTEP equipment connected with other data centers; the DCI apparatus includes: at least one processor and memory; wherein the memory is to store one or more computer programs; the memory stores one or more computer programs that, when executed by the at least one processor, enable the DCI device to perform the method of the first aspect described above or any one of the possible designs of the first aspect described above.

In a fourth aspect, embodiments of the present application provide a computer-readable storage medium storing computer instructions that, when executed on a computer, enable the computer to perform the method of the first aspect or any one of the possible designs of the first aspect.

The beneficial effect of this application is as follows:

in the technical scheme of the embodiment of the application, a first DCI device receives a first VX L AN message sent by a first VTEP device, the first VX L AN message is a VX L AN message obtained by encapsulating a V L AN message of AN access destination host sent by a source host by the first VTEP device, the first VX L AN message includes address information of the destination host and a first VNI, the first VNI is a VNprivate I of a source data center, the first VX L AN message is mapped to a public VNI by the first DCI device to obtain a second VX L AN message corresponding to the first VX L AN message, a second VX 856 AN message includes address information of the public VNI and the destination host, the first DCI device obtains stored address forwarding table entry information, forwards a second VX L AN message to a second DCI device based on the address forwarding table entry information, so that the second DCI device and a second DCI device forward a second VX L AN message to a destination host through a third VNI, the third VNI device obtains a forwarding table entry information 36897 AN message, the forwarding table entry information of the second VNI, the third VNI is obtained by a forwarding table entry information of the third VNI, the third VNI is distributed according to a forwarding table entry 369626, the third VNI, the forwarding table entry information of the third VNI, the third VN IP interconnection data center, and the third VNI, the third VN IP interconnection data center, the third data center is distributed data center, and the third data center, and the third data center, wherein the third data center, the third data center is distributed data center, and the third data center, and the third data center are distributed data center, and the third data center, and the.

Drawings

Fig. 1 is a schematic structural diagram of a multi-data center interconnection communication system according to an embodiment of the present application;

fig. 2 is a schematic flowchart of a method for interconnecting multiple data centers according to an embodiment of the present application;

fig. 3 is a schematic diagram illustrating a process of synchronizing address information of a destination host of a destination data center to a source data center according to an embodiment of the present application;

fig. 4 is a schematic process diagram of a source host of a source data center and a destination host of a destination data center, which are provided in the embodiment of the present application and interconnected;

fig. 5 is a schematic structural diagram of a DCI apparatus according to an embodiment of the present disclosure;

fig. 6 is a schematic structural diagram of a DCI apparatus according to an embodiment of the present application.

Detailed Description

In order to make the purpose, technical solutions and advantages of the present application clearer, the present application will be described in further detail with reference to the accompanying drawings, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

The shapes and sizes of the various elements in the drawings are not to be considered as true proportions, but rather are merely intended to illustrate the context of the application.

In the embodiments of the present application, "first" to "fourth" are used to distinguish different objects, and are not used to describe a specific order. Furthermore, the term "comprises" and any variations thereof, which are intended to cover non-exclusive protection. For example, a process, method, system, article, or apparatus that comprises a list of steps or elements is not limited to only those steps or elements listed, but may alternatively include other steps or elements not listed, or inherent to such process, method, article, or apparatus.

In the embodiment of the present application, "and/or" is only one kind of association relation describing an association object, and indicates that three kinds of relations may exist, for example, a and/or B may indicate: a exists alone, A and B exist simultaneously, and B exists alone.

In this embodiment of the present application, the address information of all hosts located in any data center may include, but is not limited to: media Access Control Address (MAC) information, Address Resolution Protocol (ARP) information, Neighbor Discovery Protocol (ND) information, Internet Protocol Address (IP) routing prefix information, and Ethernet Segment (ES) multi-homing information, which are not limited in this embodiment.

In order to facilitate understanding of technical solutions in the embodiments of the present application by those skilled in the art, a structure of a multi-data center interconnected communication system is described as an application scenario of the embodiments of the present application.

Fig. 1 is a schematic structural diagram of a multi-data center interconnection communication system according to an embodiment of the present application. As shown in fig. 1, the multi-data center interconnection communication system includes a plurality of data centers, and fig. 1 exemplifies that the multi-data center interconnection communication system includes two data centers, namely, a source data center and a destination data center. Wherein each data center may include at least one HOST, such as a Virtual Machine (VM), for example, in fig. 1, the source data center includes HOST-4, and the destination data center includes HOSTs HOST-1, HOST-2, and HOST-3. Each data center may communicate with other data centers in an interconnected manner, i.e., HOSTs in each data center may communicate with HOSTs in other data centers in an interconnected manner, e.g., source HOST HOST-4 in a source data center may communicate with any one of destination HOSTs HOST-1, HOST-2, and HOST-3 in a destination data center.

Continuing with reference to fig. 1, taking the destination HOST as HOST-2 as AN example, when HOST-4 wants to access HOST-2, it may send a Virtual local Area Network (Virtual L local Area Network, V L AN) message to first Virtual extended local Area Network tunnel termination node (HOST eXtensible L local Area Network End Point, VTEP) device 102, after receiving the V L AN message, first VTEP device 102 encapsulates V L AN message into a Virtual eXtensible local Area Network (Virtual L local Area Network, V L AN) message, and forwards the VX L AN message to first Data Center Data Interconnection (vtc Center Interconnection, DCI) device 100, first DCI device 100 may forward the received VX L AN message to second DCI device 101, and forward the DCI message to second vtst device 101, which is located in the destination ep 1 n — n 3 n, and then the first DCI device may forward the DCI device L AN message to the second vtst device 101, and forward the DCI message to the second VTEP 1AN n 11 n 362 n 11 n, where the DCI device 103 and the second VTEP 1AN n 11 n 3 n 2 n.

As can be seen from the foregoing, in the conventional scheme, when a plurality of data centers are interconnected, it is required that VNIs allocated to the same tenant in all the data centers are the same, in other words, VNIs of VX L AN to which a source host and a destination host belong are the same, for example, if the VNI of VX L AN to which the source host belongs is 120, the VNI of VX L AN to which the destination host belongs is 120, so that resources among the plurality of data centers need to be uniformly allocated, and the same VNI needs to be uniformly planned according to the tenant, which results in poor flexibility of data center deployment and resource planning, and high difficulty in interconnection across the data centers.

To solve this problem, in this embodiment of the application, when any host (i.e., a source host) of a source data center accesses a host (i.e., a destination host) of a destination data center, after receiving a first VX L AN message (including a first VNI of the source data center and address information of the destination host) sent by a first VTEP device, a first DCI device 100 maps a first VNI in the first VX L AN message to a public VNI to obtain a second VX L AN message (including the public VNI and address information of the destination host) corresponding to a first VX L AN message, and then forwards a second VX L AN message to a second DCI device 102, after receiving a second VX L AN 865 message, maps the public VNI in the second VX L AN message to a second VNI (being a private VNI of the destination data center), obtains a third VX L AN message (including second VX L AN i message and address information of the second vtn L AN) corresponding to the second VX L AN n message, and then forwards the third VX L AN interconnection message to a destination host interconnection node n L, so that a destination host interconnection node obtains a destination data center interconnection address of the third VX L AN interconnection node and sends a destination data interconnection message to a destination data center, and sends the interconnection node interconnection information, thereby obtaining a destination data interconnection information.

In the embodiment of the application, a first DCI device is used for mapping a first VNI of a source data center in a first VX L AN message to a public VNI to obtain a second VX L AN message, the second DCI device is used for forwarding a third VX L AN message obtained by mapping the public VNI in the second VX L AN to a second VNI of a target data center to obtain a second VTEP device, the second VTEP device is used for forwarding a V L AN message obtained by de-packaging the third VX L AN message to a target host to realize cross-data center forwarding of the VX L AN message, and in this way, when the VX L AN message of the cross-data center is forwarded by adopting the public VNI, the data centers do not need to allocate the same VNI according to tenants, and the data centers can independently allocate tenant resources, so that the flexibility of data center deployment and unified planning is improved, and the difficulty of cross-data center interconnection is reduced.

The following describes an interconnection communication process between a source host of a source data center and a destination host of a destination data center.

Fig. 2 is a schematic flowchart illustrating a multi-data center interconnection communication method according to an embodiment of the present application. The method can be applied to the multi-data-center interconnected communication system or a multi-data-center interconnected communication system similar to the multi-data-center interconnected communication system. In fig. 2, the first DCI apparatus is taken as an example of an execution subject. As shown in fig. 2, the method flow includes:

s201, receiving a first VX L AN message sent by a first VTEP device, wherein the first VX L AN message is a VX L AN message obtained by encapsulating a V L AN message sent by a source host and used for visiting a destination host by the first VTEP device, the first VX L AN message comprises address information of the destination host and a first VNI, and the first VNI is a private VNI of a source data center.

Specifically, the second DCI device does not know which host of the destination data center the host of the source data center is to perform internet communication with which host of the destination data center is located, that is, the second DCI device does not know which host of the destination data center is the destination host, and therefore after receiving the address information of all hosts (including the destination host) in the destination data center located in the second DCI device, the second DCI device may create address forwarding table entry information including the address information of the common VNI and all hosts located in the destination data center and send the address forwarding table entry information to the first DCI device, so that the first DCI device may forward the second VX AN packet accessing the destination host to the second DCI device according to the address forwarding table entry L.

The following describes a process of synchronizing address information of a destination host located in a destination data center to a source data center in the embodiment of the present application, taking the destination host in the destination data center as an example.

Fig. 3 is a schematic diagram illustrating a process of synchronizing address information of a destination host of a destination data center to a source data center according to an embodiment of the present application. In fig. 3, HOST-2 is taken as the destination HOST, the address information is MAC address information, the first VNI is 220, the second VNI is 120, and the common VNI is 320. As shown in fig. 3, the process includes:

in the first step, after learning the MAC address information of HOST-2, the second VTEP device 103 creates and stores MAC address table entry information (including MAC address information of the destination HOST) of the destination HOST, and sends the MAC address table entry information to the third VTEP device 104 and the second DCI device 101, so that the third VTEP device 104 creates and stores first MAC address forwarding table entry information and the second DCI device 101 creates and stores second MAC address forwarding table entry information. The first MAC address forwarding table entry information and the second MAC address forwarding table entry information both include MAC address information of the second VNI and HOST-2.

As AN example, please refer to fig. 3 continuously, in the first step, after the MAC address table entry information of HOST-2 created and stored by the second VTEP device 103, the second VTEP device 103 sends the MAC address table entry information to the third VTEP device 104 and the second DCI device 101 through AN Ethernet Virtual Private Network (EVPN) routing protocol, after the second DCI device 101 receives the MAC address table entry information, a second MAC address forwarding table entry information and a table entry exit pointing to a third VX L AN tunnel of the second VTEP device 103 are created and stored according to the routing packet of the EVPN protocol routing of the second VTEP device 103 and the MAC address information of HOST-2, after the third VTEP device 104 receives the MAC address table entry information, a routing packet and MAC address information of the EVPN protocol routing of the second VTEP device 103 are created and stored according to the vxl forwarding table entry information and the table entry information of the vxl tunnel of the second VTEP device 103, where the second VTEP device 103 and the second VTEP device 103 are used for advertising the routing packet of the second VTEP device 103 and the second VTEP device 103 through the vxl routing table entry of the vxl routing packet of the vxl routing protocol of the second VTEP device 103.

Illustratively, as shown in table 1, the VNI of the first MAC address forwarding entry information is 120, the MAC address information is the MAC address information of HOST-2, and the MAC address forwarding entry information of the entry outlet pointing to the second VTEP device.

TABLE 1

Illustratively, as shown in table 2, the VNI of the second MAC address forwarding entry information is 120, the MAC address information is the MAC address information of HOST-2, and the MAC address forwarding entry information pointing to the second VTEP device is an entry exit.

TABLE 2

Second, the second DCI apparatus 101 maps the second VNI to the public VNI through EVPN protocol routing mapping, and sends second MAC address forwarding table entry information to the first DCI apparatus 100, so that after the first DCI apparatus 100 receives the second MAC address forwarding table entry information, third MAC address forwarding table entry information including the public VNI and the MAC address information of HOST-2 is created and stored.

Illustratively, VX L AN tunnels are created between VTEP devices of each data center through AN EVPN routing protocol, all VTEP devices in the same data center mutually establish VX L AN tunnels and only DCI devices establish VX L AN tunnels between data centers in a network topology of a multi-data center interconnected communication system.

Therefore, when the MAC address information of the HOST-2 of the destination data center is synchronized to the source data center, the second DCI apparatus 101 transmits second MAC address forwarding table entry information including the second VNI and the MAC address information of the destination HOST to the first DCI apparatus 100.

For example, please refer to fig. 3 again, in the second step, after the first DCI device 100 receives the second MAC address forwarding table information, according to the route packet of the EVPN protocol route of the second DCI device 101 and the second MAC address forwarding table information, a third MAC address forwarding table information and a first VX L AN tunnel whose table entry is pointed to the second DCI device 101 are created and stored, where the route packet of the EVPN protocol route of the second DCI device 101 is used to notify the first DCI device 100 that the VNI of the VX L AN to which the EVPN protocol route of the second DCI device 101 belongs is 320.

Illustratively, as shown in table 3, the third MAC address forwarding entry information is VNI 320, the MAC address information is MAC address information of HOST-2, and the MAC address forwarding entry information of the entry pointing to the second DCI device 101.

TABLE 3

Third, the first DCI device 100 sends third MAC address forwarding table information to the first VTEP device 102, so that after receiving the third MAC address forwarding table information, the first VTEP device 102 maps the common VNI to the first VNI through EVPN protocol routing mapping, and creates and stores fourth MAC address forwarding table information including MAC address information of the first VNI and HOST-2.

For example, please refer to fig. 3 continuously, in the third step, after the first VTEP device 102 receives the third MAC address forwarding table information, according to the routing packet of the EVPN protocol route of the first DCI device 100 and the third MAC address forwarding table information, a second VX L AN tunnel pointing to the first DCI device 100 is created and stored with the fourth MAC address forwarding table information and the table exit, where the routing packet of the EVPN protocol route of the first DCI device 100 is used to notify the first VTEP device 102 that the VNI of the VX L AN to which the EVPN protocol route of the first DCI device 100 belongs is 220.

Illustratively, as shown in table 4, the fourth MAC address forwarding entry information is VNI 220, the MAC address information is MAC address information of HOST-2, and the MAC address forwarding entry information of the entry pointing to the first DCI device 100.

TABLE 4

The above description is an example in which the MAC address information of the destination HOST-2 of the destination data center is synchronized with the source data center. Of course, the process of synchronizing the MAC address information of the destination HOSTs HOST-1 and HOST-3 of the destination data center to the source data center is similar to the process of synchronizing the MAC address information of the destination HOST-2 of the destination data center to the source data center, and is not described herein again. That is, in a specific implementation process, the second MAC address forwarding table information created by the second DCI device may further include MAC address information of HOST-1 and HOST-3, and further, the third MAC address forwarding table entry information created by the first DCI device and the fourth MAC address forwarding table entry information created by the first VTEP device may further include MAC address information of HOST-1 and HOST-3.

The above description is an example in which the MAC address information of the destination HOST-2 of the destination data center is synchronized with the source data center. The process of synchronizing the ARP information, the ND information, the IP routing prefix information and the Ethernet segment ES multi-home information of the destination HOSTs HOST-1, HOST-2 and HOST-3 of the destination data center to the source data center is similar to the process of synchronizing the MAC address information of the destination HOST HOST-2 of the destination data center to the source data center, and is not repeated herein.

In this embodiment of the present application, when synchronizing to a source data center, VNI mapping is performed on address forwarding table entry information of all address information of hosts of a destination data center through DCI equipment of the destination data center, and VNI mapping is performed again on DCI equipment of the source data center, so that private VNIs in the address forwarding table entry information in the destination data center are implemented, and address forwarding table entry information including the private VNIs of the source data center is finally generated in the source data center through conversion of a public VNI.

Optionally, after address forwarding table entry information of address information of all hosts of the destination data center is synchronized to the source data center, the first DCI device may send, across the data center, a second VX L AN message accessing the destination host to the second DCI device according to the address forwarding table entry information, where the second VX L AN message includes the address information of the destination host and the first VNI.

The following describes a process of receiving, by a first DCI device, a first VX L AN message forwarded by a first VTEP device in this embodiment.

Fig. 4 is a schematic diagram illustrating a process of communicating between a source host of a source data center and a destination host of a destination data center according to an embodiment of the present application. In fig. 4, address forwarding table entry information is taken as MAC address forwarding table entry information, the destination HOST is HOST-2, the first VNI is 220, the second VNI is 120, and the common VNI is 320 as an example.

As shown in fig. 4, when HOST-4 accesses HOST-2, a virtual local area network V L AN message may be sent to the first VTEP device 102. after the first VTEP device 102 receives a V L AN message sent by HOST-4 and accessing HOST-2, the first VTEP device 102 maps a V L AN domain to which the V L AN message belongs to a VX L AN domain of the first VNI, and obtains a first VX L AN message corresponding to the V L AN message, where the first VX L AN message includes MAC address information of HOST-2 and the first VNI, i.e., the first step in fig. 4.

Referring to fig. 3 and 4, in the process of forwarding the first VX L AN packet to the first DCI device 100 by the first VTEP device 102, the first VTEP device 102 may find the MAC address information of the HOST-2 and the second VX L AN tunnel according to the first VNI and the fourth MAC address forwarding table entry information, and then the first VTEP device 102 may forward the first VX L AN packet to the first DCI device 100 through the second VX L AN tunnel, which is the second step in fig. 4.

S202, mapping a first VNI in the first VX L AN message to a public VNI to obtain a second VX L AN message corresponding to the first VX L AN message, wherein the second VX L AN message comprises the public VNI and address information of a target host.

Continuing to combine with fig. 3 and 4, after receiving the first VX L AN packet, the first DCI device 100 decapsulates the first VX L AN packet, maps the first VNI to the common VNI through EVPN protocol routing mapping, and encapsulates the decapsulated first VX L AN packet again to obtain a second VX L AN packet corresponding to the first VX L AN packet.

S203, the stored address forwarding table information is obtained, the second VX L AN message is forwarded to the second DCI equipment based on the address forwarding table information, so that the second DCI equipment forwards a third VX L AN message corresponding to the second VX L AN message to the second VTEP equipment, the second VTEP equipment forwards a V L AN message obtained after decapsulating the third VX L AN message to the destination host machine, and interconnection communication between the source host machine and the destination host machine is achieved, wherein the address forwarding table information comprises a public VNI and address information of all host machines located in the destination data center, the third VX L AN message is a VX L AN message which is obtained by mapping the public VNI in the second VX L AN message to the second VNI by the second DCI equipment and comprises the address information of the second VNI and the destination host machine, and the second VNI is a private VNI of the destination data center.

Continuing with fig. 3 and fig. 4, the first DCI device 100 may find the MAC address information of the HOST-2 and the first VX L AN tunnel according to the public VNI and the third MAC address forwarding entry information, and then the first DCI device 100 may forward the second VX L AN packet to the second DCI device 101 through the first VX L AN tunnel, which is the third step in fig. 4.

Optionally, after receiving the second VX L AN message, the second DCI device 101 decapsulates the second VX L AN message, and maps the common VNI in the second VX L AN message to the second VNI through EVPN protocol routing mapping, and encapsulates the decapsulated second VX L AN message again to obtain a third VX L AN message corresponding to the second VX L AN message, where the third VX L AN message includes the second VNI and MAC address information of HOST-2.

With continued reference to fig. 3 and fig. 4, the second DCI device 101 may find the MAC address information of the HOST-2 and the third VX L AN tunnel according to the second VNI and the second MAC address forwarding entry information, and forward the third VX L AN packet to the second VTEP device 103 through the third VX L AN tunnel, which is the fourth step in fig. 4.

Please refer to fig. 3 and 4, after receiving the third VX L AN message, the second VTEP device 103 decapsulates the third VX L AN message, and maps the VX L AN domain of the second VNI to which the third VX L AN message belongs to the V L AN domain to which the HOST-2 belongs, so as to obtain a V L AN message, and then the second VTEP device 103 finds the MAC address of the HOST-2 according to the stored MAC address table entry information, and then the second VTEP device 103 connects down to the HOST-2, and forwards the V L AN message to the HOST-2, so as to complete the interconnection communication between the HOST-4 and the HOST-2 across the data center, that is, the fifth step in fig. 4.

The above is an example of the interconnection communication procedure between HOST-4 and HOST-2. Of course, the interconnection communication process between HOST-4 and HOST-1 and HOST-3 is similar to that between HOST-4 and HOST-2, and will not be described herein again.

It should be noted that the data center where HOST-4 is located is taken as a source data center, and the data center where HOST-2 is located is taken as a destination data center. When HOST-2 accesses HOST-4, the data center where HOST HOST-4 is located is the destination data center, and the data center where HOST HOST-2 is located is the source data center. The procedure of HOST-2 accessing HOST-4 is similar to the procedure of HOST-4 accessing HOST-2, and is not described herein again.

It should be noted that, the address information in the interconnection communication process between the source host and the destination host is, for example, MAC address information. When the address information in the interconnection communication process between the source host and the destination host may also be one or more of ARP information, ND information, IP routing prefix information, and ethernet segment ES multi-homing information, the interconnection communication process between the source host and the destination host is similar to that between the source host and the destination host when the address information is MAC address information, and is not described herein again.

As can be seen from the above description, in the technical solution of the embodiment of the present application, a first DCI device receives a first VX L AN message sent by a first VTEP device, the first VX L AN message is a VX L AN message obtained by encapsulating a V L AN message, sent by a first VTEP device, that accesses a destination host, sent by a source host, by a first VTEP device, the first VX L AN message includes address information of the destination host and a first VNI, the first VNI is a private VNI of a source data center, the first DCI device maps the first VNI of a VX L AN message to a public VNI to obtain a second VX L AN message corresponding to a first VX L AN message, the second VX 856 AN message includes address information of the public VNI and the destination host, the first DCI device obtains stored address forwarding table entry information, forwards the second VX L AN DCI message to a second VX 897 AN device based on the address forwarding table entry information, so that the second VX device and the second VX 56 AN interconnection node forward the second VX report to a second VNI and a destination host, the third VNI obtain a third VNI interconnection data forwarding table entry information, the third VNI is capable of obtaining a third VNI, and the third interconnection data forwarding table entry information, wherein the third interconnection data center is capable of the third VNI is obtained by a third VNI, the interconnection data center 369626 and the interconnection data center 369626.

Based on the same inventive concept, the embodiment of the application provides a DCI device. Please refer to fig. 5, which is a schematic structural diagram of a DCI apparatus provided in an embodiment of the present application.

Wherein, the DCI device shown in fig. 5, the first VTEP device (not shown in fig. 5), and the source host (not shown in fig. 5) are located in a source data center, and the second DCI device (not shown in fig. 5), the second VTEP device (not shown in fig. 5), and the destination host (not shown in fig. 5) are located in a destination data center; wherein, the DCI apparatus 500 includes:

the receiving unit 501 is used for receiving a first VX L AN message sent by a first VTEP device, wherein the first VX L AN message is a VX L AN message obtained by encapsulating a V L AN message which is sent by a source host and used for accessing a destination host by the first VTEP device, the first VX L AN message comprises address information of the destination host and a first VNI, and the first VNI is a private VNI of a source data center;

the processing unit 502 is configured to map a first VNI in the first VX L AN message to a public VNI, and obtain a second VX L AN message corresponding to the first VX L AN message, where the second VX L AN message includes the public VNI and address information of a destination host;

a forwarding unit 503, configured to acquire stored address forwarding table information, forward the second VX L AN packet to the second DCI device based on the address forwarding table information, so that the second DCI device forwards a third VX L AN packet corresponding to the second VX L AN packet to the second VTEP device, and the second VTEP device forwards a V L AN packet obtained after decapsulating the third VX L AN packet to the destination host to implement the interconnection communication between the source host and the destination host, where the address forwarding table information includes a public VNI and address information of all hosts located in the destination data center, the third VX L AN packet is a VX L AN packet that is obtained after the second DCI device maps the public VNI in the second VX L AN packet to the second VNI and includes address information of the second VNI and the destination host, and the second VNI is a private VNI of the destination data center.

In a possible embodiment, the receiving unit 501 is further configured to:

In a possible embodiment, the forwarding unit 503 is further configured to:

based on the address forwarding table entry information, finding a first VX L AN tunnel with the table entry outlet pointing to the second DCI equipment;

In a possible embodiment, the receiving unit 501 is further configured to:

and receiving a routing message sent by the second DCI equipment, wherein the routing message is used for notifying that the VNI of the VX L AN to which the Ethernet virtual private network EVPN routing protocol of the second DCI equipment belongs of the first DCI equipment is the public VNI.

In one possible embodiment, the address information of all hosts located in the destination data center may include, but is not limited to: the method comprises the following steps of one or more of media access control address (MAC) information, Address Resolution Protocol (ARP) information, neighbor discovery protocol (ND) information, internet protocol address (IP) routing prefix information and Ethernet Segment (ES) multi-homing information.

The DCI apparatus 500 in the embodiment of the present application and the multiple data center interconnection communication method shown in fig. 2 are inventions based on the same concept, and through the foregoing detailed description of the multiple data center interconnection communication method, a person skilled in the art may clearly understand the implementation process of the DCI apparatus 500 in the embodiment, so for brevity of the description, details are not repeated here.

Based on the same inventive concept, the embodiment of the application provides a DCI device. Please refer to fig. 6, which is a schematic structural diagram of a DCI apparatus provided in an embodiment of the present application.

As shown in fig. 6, the DCI apparatus 600 includes:

a memory 601 for storing one or more computer instructions;

at least one processor 602 configured to read computer instructions in the memory 601, so that the electronic device 600 can implement all or part of the steps in the embodiment shown in fig. 2.

Optionally, the memory 601 may include a high-speed random access memory, and may further include a nonvolatile memory, such as a magnetic disk storage device, a flash memory device, or another nonvolatile solid-state storage device, and the embodiments of the present application are not limited thereto.

Alternatively, the processor 602 may be a general-purpose processor (CPU), an Application Specific Integrated Circuit (ASIC), a Field Programmable Gate Array (FPGA), or one or more Integrated circuits for controlling program execution.

In some embodiments, the memory 601 and the processor 602 may be implemented on the same chip, and in other embodiments, they may also be implemented separately on separate chips, which is not limited in this application.

Based on the same inventive concept, embodiments of the present application provide a computer-readable storage medium, where computer instructions are stored, and when the computer instructions are executed by a computer, the computer instructions cause the computer to perform the steps of the above-mentioned multi-data center interconnection communication method.

As will be appreciated by one skilled in the art, embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may employ an entirely hardware embodiment, an entirely software embodiment, or an embodiment combining software and hardware aspects. Moreover, the present application may employ a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, etc.) having computer-usable program code embodied therein.

The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the application. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

It will be apparent to those skilled in the art that various changes and modifications may be made in the present application without departing from the spirit and scope of the application. Thus, if such modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is intended to include such modifications and variations as well.

Claims

1. A multi-data center interconnection communication method is characterized by being applied to a multi-data center interconnection communication system; the DCI equipment is virtual extended local network tunnel termination node VTEP equipment connected with other data centers; the first DCI equipment, the first VTEP equipment and the source host are located in a source data center, the second DCI equipment, the second VTEP equipment and the destination host are located in a destination data center, and the method comprises the following steps:

the first DCI equipment receives a first virtual extensible local area network VX L AN message sent by the first VTEP equipment, wherein the first VX L AN message is a VX L AN message obtained by encapsulating a virtual local area network V L AN message which is sent by a source host and used for visiting the destination host by the first VTEP equipment, the first VX L AN message comprises address information of the destination host and a first virtual extensible local network identifier VNI, and the first VNI is a private VNI of the source data center;

2. The method of claim 1, wherein prior to the first DCI device receiving the first VX L AN message sent by the first VTEP device, the method further comprises:

3. The method of claim 2, wherein forwarding, by the first DCI device, the second VX L AN message to the second DCI device based on the address forwarding entry information comprises:

4. The method of any of claims 1-3, wherein prior to the first DCI device mapping a first VNI in the first VX L AN message to a common VNI, the method further comprises:

5. The method of claim 4, wherein the address information for all hosts in the destination data center comprises: the method comprises the following steps of one or more of media access control address (MAC) information, Address Resolution Protocol (ARP) information, neighbor discovery protocol (ND) information, internet protocol address (IP) routing prefix information and Ethernet Segment (ES) multi-homing information.

6. A first DCI device, configured to be applied to a multi-data center interconnection communication system; the DCI equipment is VTEP equipment connected with other data centers; the first DCI equipment, the first VTEP equipment and the source host are positioned in a source data center, and the second DCI equipment, the second VTEP equipment and the destination host are positioned in a destination data center; wherein the first DCI device comprises:

7. The first DCI device of claim 6, wherein the receiving unit is further to:

8. The first DCI device of claim 6, wherein the forwarding unit is further to:

9. The first DCI device of any one of claims 6-8, wherein the receiving unit is further to:

10. The first DCI device of claim 9, wherein the address information for all hosts in the destination data center comprises: the method comprises the following steps of one or more of media access control address (MAC) information, Address Resolution Protocol (ARP) information, neighbor discovery protocol (ND) information, internet protocol address (IP) routing prefix information and Ethernet Segment (ES) multi-homing information.

11. DCI equipment is applied to a multi-data center interconnection communication system; the DCI equipment is VTEP equipment connected with other data centers; wherein the DCI device comprises at least one processor and a memory;

the memory for storing one or more computer programs;

the one or more computer programs stored by the memory, when executed by the at least one processor, cause the DCI device to perform the method of any of claims 1-5.

12. A computer-readable storage medium having stored thereon computer instructions which, when executed on a computer, cause the computer to perform the method of any one of claims 1-5.