WO2016146077A1

WO2016146077A1 - Dynamic route configuration method, device and system

Info

Publication number: WO2016146077A1
Application number: PCT/CN2016/076633
Authority: WO
Inventors: 李琳
Original assignee: 华为技术有限公司
Priority date: 2015-03-18
Filing date: 2016-03-17
Publication date: 2016-09-22
Also published as: CN106034077B; CN106034077A

Abstract

Embodiments of the present invention relate to the field of computers. Disclosed are a dynamic route configuration method, device and system, addressing a problem of a large workload and inconvenient adjustment resulting from manually configuring a route using a distributed gateway. The specific solution comprises: receiving, by an SDN controller, a route learning message transmitted by a dynamic route agent; updating, by the SDN controller, according to external route information, at least one of first route table entries; receiving, by the SDN controller, a data packet from a virtual machine and transmitted by a virtual switch of the virtual machine; converting, by the SDN controller, a second route table entry to a first flow entry; transmitting, by the SDN controller, the first flow entry to the virtual switch of the virtual machine so as to indicate the virtual switch of the virtual machine to forward, according to the first flow entry and from the virtual machine via a distributed gateway deployed in the virtual switch of the virtual machine, a data packet.

Description

Dynamic routing configuration method, device and system

Technical field

The present invention relates to the field of computers, and in particular, to a dynamic routing configuration method, apparatus, and system.

Background technique

Software Defined Network (English: Software Defined Network, abbreviation: SDN) is a network that separates the control plane and data plane of a network device. At present, one technology commonly used in SDN is OpenFlow technology. With this technology, the SDN controller can control the forwarding of data packets by the virtual switch by controlling the flow table on the virtual switch. As SDN technology continues to mature, more and more operators/cloud service providers use SDN as a preferred solution for managing data centers.

Within a data center, one or more virtual machines can be deployed on a single physical server. Each virtual machine needs to go through a centralized gateway and a border gateway when sending data packets to data center external devices. However, as the size of the data center expands, the data traffic between the virtual machines inside the data center and the external devices in the data center increases dramatically, and the data traffic through the centralized gateway is also very large, which may result in a centralized gateway. The load is too large and affects network performance.

To share the load of the centralized gateway, consider using a distributed gateway to deploy a distributed gateway on each virtual machine's virtual switch (that is, the virtual switch accessed by the virtual machine). Each virtual machine passes its own virtual switch. The deployed distributed gateway sends packets to the data center external device. However, in order to enable the virtual machine to send data packets to the data center external device, the route between the border gateway and the data center external device needs to be separately configured on each distributed gateway. If these routes are manually configured, the workload will be large. And when the network topology changes, it is inconvenient to manually adjust these routes.

Summary of the invention

The embodiment of the invention provides a dynamic routing configuration method, device and system, which are used to solve the problem that the manual configuration routing workload is large and the adjustment is inconvenient when using the distributed gateway.

In order to achieve the above object, embodiments of the present invention adopt the following technical solutions:

A first aspect of the embodiments of the present invention provides a dynamic routing configuration method, which is applied to a software-defined network SDN, where the SDN is connected to an external network through a border gateway, where the SDN includes: an SDN controller, at least two virtual The virtual switch of the virtual machine and the dynamic routing agent are deployed on the virtual switch of the virtual machine, and the method includes:

The SDN controller receives the route learning message sent by the dynamic routing agent, where the route learning message carries external routing information, where the external routing information is used to represent a routing relationship between the external device and the border gateway;

The SDN controller updates at least one first routing entry according to the external routing information, and each of the at least one first routing entry includes an address of the external device and the The address of the border gateway through which the external device sends the packet;

When the SDN controller receives the data packet from the virtual machine sent by the virtual switch of the virtual machine, the SDN controller converts the second routing entry into the first flow entry, where the second routing entry is the at least one a routing entry in the first routing entry, the address of the external device included in the second routing entry is the same as the destination address of the data packet from the virtual machine, and the virtual machine is the at least Any one of the two virtual machines;

The SDN controller sends the first flow entry to the virtual switch of the virtual machine to indicate that the virtual switch of the virtual machine is deployed through the virtual switch of the virtual machine according to the first flow entry. The gateway forwards the data packet from the virtual machine.

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

The SDN controller obtains internal routing information from at least one third routing entry, and each third routing entry in the at least one third routing entry includes an address of the virtual machine and the virtual The address of the distributed gateway to be sent when the server sends the data packet, and the distributed gateway to be sent when the data packet is sent to the virtual machine is a distributed gateway deployed on the virtual switch of the virtual machine, the internal route The information is used to characterize a routing relationship between the virtual machine and a distributed gateway deployed on a virtual switch of the virtual machine;

Sending, by the SDN controller, the first carrying the internal routing information to the dynamic routing proxy a route advertisement message, where the first route advertisement message is used to instruct the dynamic routing agent to issue the internal routing information to a border gateway;

The routing table is stored in the SDN controller, and the routing table includes the at least one first routing entry and the at least one third routing entry.

With reference to the first possible implementation manner of the first aspect, in a second possible implementation manner of the first aspect, before the SDN controller obtains internal routing information from the at least one third routing entry, The method also includes:

The SDN controller acquires routing information of the virtual machine, where routing information of the virtual machine includes an address of the virtual machine and an address of a distributed gateway deployed on a virtual switch of the virtual machine;

The SDN controller generates the third routing entry according to the routing information of the virtual machine.

In conjunction with the second possible implementation of the first aspect, in a third possible implementation manner of the first aspect, after the SDN controller generates the third routing entry according to the routing information of the virtual machine, The method further includes:

The SDN controller converts the third routing entry into a second flow entry, and sends the second flow entry to the virtual switch of the virtual machine.

In conjunction with the first aspect and the foregoing possible implementation manner, in a fourth possible implementation manner of the first aspect, the dynamic routing proxy is deployed on the virtual machine, or the dynamic routing proxy is deployed on a server.

With reference to the fourth possible implementation of the first aspect, in a fifth possible implementation manner of the first aspect, the SDN further includes a centralized gateway; the routing table further includes a fourth routing entry; The fourth routing entry includes an IP address of a network segment to which the Internet Protocol IP of the virtual machine belongs and an IP address of the centralized gateway;

The method further includes:

The SDN controller obtains centralized routing information from the fourth routing entry, where the centralized routing information is used to represent a routing relationship between the virtual machine and the centralized gateway;

Sending, by the SDN controller, the second routing information carrying the centralized routing information to the dynamic routing proxy The route advertisement message is used to instruct the dynamic routing agent to issue the centralized routing information to the border gateway.

A second aspect of the embodiments of the present invention provides a dynamic routing configuration method, which is applied to a software-defined network SDN, where the SDN is connected to an external network through a border gateway, where the SDN includes: an SDN controller, at least two virtual The virtual switch of the virtual machine and the dynamic routing agent are deployed on the virtual switch of the virtual machine, and the method includes:

The dynamic routing agent receives external routing information sent by the border gateway, where the external routing information is used to represent a routing relationship between the external device and the border gateway;

The dynamic routing agent sends a route learning message carrying the external routing information to the SDN controller, so that the SDN controller updates at least one first routing entry according to the external routing information, thereby enabling the SDN When receiving the data packet from the virtual machine sent by the virtual switch of the virtual machine, the controller converts the second routing entry into the first flow entry, and sends the first flow table to the virtual switch of the virtual machine. item;

Each of the at least one first routing entry includes an address of the external device and an address of a border gateway to be sent when the data packet is sent to the external device; the second The routing entry is one of the at least one first routing entry, and the address of the external device included in the second routing entry is the same as the destination address of the data packet from the virtual machine. The virtual machine is any one of the at least two virtual machines.

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

The dynamic routing agent receives the first route advertisement message sent by the SDN controller, where the first route advertisement message carries internal routing information, where the internal routing information is used to represent the virtual machine and the virtual machine. Routing relationship between distributed gateways deployed on the virtual switch;

The dynamic routing agent issues the internal routing information to the border gateway.

With reference to the first possible implementation of the second aspect, in a second possible implementation manner of the second aspect, the dynamic routing proxy receives the external routing information sent by the border gateway, including:

The dynamic routing agent receives the external routing information sent by the border gateway based on the dynamic routing protocol;

The dynamic routing agent issues the internal routing information to the border gateway, including:

The dynamic routing agent issues the internal routing information to the border gateway based on the dynamic routing protocol.

In conjunction with the second aspect and the foregoing possible implementation manner, in a third possible implementation manner of the second aspect, the dynamic routing proxy is deployed on the virtual machine, or the dynamic routing proxy is deployed on the server.

In conjunction with the third possible implementation of the second aspect, in a fourth possible implementation manner of the second aspect, the SDN further includes a centralized gateway, where the method further includes:

The dynamic routing agent receives a second route advertisement message sent by the SDN controller, where the second route advertisement message carries centralized routing information, where the centralized routing information is used to represent the virtual machine and the centralized Routing relationship between gateways;

The dynamic routing agent issues the centralized routing information to the border gateway.

In conjunction with the fourth possible implementation of the second aspect, in a fifth possible implementation manner of the second aspect, the dynamic routing proxy advertises the centralized routing information to the border gateway, including:

The dynamic routing agent issues the centralized routing information to the border gateway based on the dynamic routing protocol.

A third aspect of the embodiments of the present invention provides a software-defined network SDN controller, which is applied to an SDN, where the SDN is connected to an external network by using a border gateway, where the SDN includes: the SDN controller, at least two a virtual machine, a virtual switch of the virtual machine, and a dynamic routing agent. The virtual switch of the virtual machine is deployed with a distributed gateway, and the SDN controller includes:

a receiving unit, configured to receive a routing learning message sent by the dynamic routing agent, where the routing learning message carries external routing information, where the external routing information is used to represent a routing relationship between the external device and the border gateway;

An update unit, configured to update at least one first routing entry according to the external routing information, where each of the at least one first routing entry includes an address of the external device and The address of the border gateway through which the external device sends the packet;

a route conversion unit, configured to convert a second routing entry into a first flow entry when the data packet from the virtual machine is sent by the virtual switch of the virtual machine, where the second routing entry is Having one routing entry in the first routing entry, the address of the external device included in the second routing entry is the same as the destination address of the data packet from the virtual machine, where the virtual machine is Describe any one of the at least two virtual machines;

a first sending unit, configured to send the first flow entry to the virtual switch of the virtual machine, to indicate that the virtual switch of the virtual machine is deployed on the virtual switch of the virtual machine according to the first flow entry The distributed gateway forwards the data packets from the virtual machine.

In conjunction with the third aspect, in a first possible implementation manner of the third aspect, the SDN controller further includes:

An obtaining unit, configured to obtain internal routing information from at least one third routing entry, where each third routing entry of the at least one third routing entry includes an address of the virtual machine and to the virtual The address of the distributed gateway to be sent when the server sends the data packet, and the distributed gateway to be sent when the data packet is sent to the virtual machine is a distributed gateway deployed on the virtual switch of the virtual machine, the internal route The information is used to characterize a routing relationship between the virtual machine and a distributed gateway deployed on a virtual switch of the virtual machine;

a second sending unit, configured to send, to the dynamic routing agent, a first route publishing message that carries the internal routing information, where the first route publishing message is used to instruct the dynamic routing agent to issue the internal to the border gateway Routing information;

In conjunction with the first possible implementation of the third aspect, in a second possible implementation manner of the third aspect, the acquiring unit is further configured to: before acquiring internal routing information from the at least one third routing entry Obtaining routing information of the virtual machine, where routing information of the virtual machine includes an address of the virtual machine and an address of a distributed gateway deployed on a virtual switch of the virtual machine;

The SDN controller further includes:

And a generating unit, configured to generate the third routing entry according to the routing information of the virtual machine.

In conjunction with the second possible implementation of the third aspect, in a third possible implementation manner of the third aspect, the route conversion unit is further configured to: use, according to the routing information of the virtual machine, the generating unit After the third routing entry is generated, the third routing entry is converted into a second flow entry.

The first sending unit is further configured to send the second flow entry to the virtual switch of the virtual machine.

In conjunction with the third aspect and the foregoing possible implementation manner, in a fourth possible implementation manner of the third aspect, the dynamic routing proxy is deployed on the virtual machine, or the dynamic routing proxy is deployed on the server.

With the fourth possible implementation of the third aspect, in a fifth possible implementation manner of the third aspect, the SDN further includes a centralized gateway; the routing table further includes a fourth routing entry; The fourth routing entry includes an IP address of a network segment to which the Internet Protocol IP of the virtual machine belongs and an IP address of the centralized gateway;

The obtaining unit is further configured to obtain centralized routing information from the fourth routing entry, where the centralized routing information is used to represent a routing relationship between the virtual machine and the centralized gateway;

The second sending unit is configured to send, to the dynamic routing agent, a second route publishing message that carries the centralized routing information, where the second route publishing message is used to instruct the dynamic routing agent to issue a message to the border gateway. Centralized routing information.

A fourth aspect of the embodiments of the present invention provides a dynamic routing proxy, which is applied to a software-defined network SDN, where the SDN is connected to an external network through a border gateway, where the SDN includes: an SDN controller, at least two virtual machines. a virtual switch of the virtual machine and the dynamic routing agent, where a virtual gateway is deployed with a distributed gateway, and the dynamic routing agent includes:

a receiving unit, configured to receive external routing information sent by the border gateway, where the external routing information is used to represent a routing relationship between the external device and the border gateway;

a sending unit, configured to send, to the SDN controller, a route learning message carrying the external routing information, so that the SDN controller updates at least one first routing entry according to the external routing information, thereby causing the SDN When receiving the data packet from the virtual machine sent by the virtual switch of the virtual machine, the controller converts the second routing entry into the first flow entry, and sends the first flow table to the virtual switch of the virtual machine. item;

The first routing entry in the at least one first routing entry includes the external The address of the device and the address of the border gateway to be sent when the data packet is sent to the external device; the second routing entry is one of the at least one first routing entry, the second route The address of the external device included in the entry is the same as the destination address of the data packet from the virtual machine, and the virtual machine is any one of the at least two virtual machines.

With reference to the fourth aspect, in a first possible implementation manner of the fourth aspect, the receiving unit is further configured to receive a first route advertisement message sent by the SDN controller, where the first route advertisement message is carried Having internal routing information, the internal routing information is used to represent a routing relationship between the virtual machine and a distributed gateway deployed on a virtual switch of the virtual machine;

The sending unit is further configured to advertise the internal routing information to the border gateway.

In conjunction with the first possible implementation of the fourth aspect, in a second possible implementation manner of the fourth aspect, the dynamic routing proxy further includes:

a control unit, configured to control the receiving unit to receive external routing information sent by the border gateway according to a dynamic routing protocol;

The control unit is further configured to control the sending unit to release the internal routing information to the border gateway based on the dynamic routing protocol.

In conjunction with the fourth aspect and the foregoing possible implementation manner, in a third possible implementation manner of the fourth aspect, the dynamic routing proxy is deployed on the virtual machine, or the dynamic routing proxy is deployed on the server.

With reference to the third possible implementation manner of the fourth aspect, in a fourth possible implementation manner of the fourth aspect, the SDN further includes a centralized gateway;

The receiving unit is further configured to receive a second route advertisement message sent by the SDN controller, where the second route advertisement message carries centralized routing information, where the centralized routing information is used to represent the virtual machine and the The routing relationship between the centralized gateways;

The sending unit is further configured to advertise the centralized routing information to the border gateway.

In conjunction with the fourth possible implementation of the fourth aspect, in a fifth possible implementation manner of the fourth aspect, the control unit is further configured to control the sending unit to send to the border gateway based on the dynamic routing protocol Publish the centralized routing information.

A fifth aspect of the embodiments of the present invention provides a dynamic routing configuration system, where the system includes: a software defined network SDN controller, at least two virtual machines, a virtual switch of the virtual machine, and a dynamic routing agent, the virtual A distributed gateway is deployed on the virtual switch of the machine;

The SDN controller is configured to receive a route learning message sent by the dynamic routing agent, where the route learning message carries external routing information, where the external routing information is used to represent a routing relationship between an external device and a border gateway. Updating at least one first routing entry according to the external routing information, where each of the at least one first routing entry contains an address of the external device and sends data to the external device The address of the border gateway to pass through when the packet is received; when receiving the data packet from the virtual machine sent by the virtual switch of the virtual machine, converting the second routing entry into the first flow entry, the second routing entry For one of the at least one first routing entry, the address of the external device included in the second routing entry is the same as the destination address of the data packet from the virtual machine, the virtual The machine is any one of the at least two virtual machines; the first flow entry is sent to the virtual switch of the virtual machine to indicate the virtual machine The proposed switch to the first flow table entry, the distributed virtual switch through the gateway of the virtual machine deployed forward the data packet from the virtual machine;

The dynamic routing agent is configured to receive the external routing information sent by the border gateway, and send the routing learning message that carries the external routing information to the SDN controller, so that the SDN controller is configured according to the Updating the at least one first routing entry by the external routing information, so that the SDN controller sends the second route when receiving the data packet from the virtual machine sent by the virtual switch of the virtual machine The entry is converted into the first flow entry, and the first flow entry is sent to the virtual switch of the virtual machine.

The dynamic routing configuration method, device and system provided by the embodiment of the present invention, the SDN controller updates at least one first routing entry according to the external routing information carried in the received routing learning message; the SDN controller receives the virtual machine (SDN) When the virtual switch of any virtual machine included in the virtual machine sends a packet from the virtual machine, the second routing entry is converted into the first flow entry, and the first flow entry is sent to the virtual switch of the virtual machine. The virtual switch of the virtual machine forwards the data packet from the virtual machine through the distributed gateway deployed on the virtual switch of the virtual machine according to the first flow entry. The second routing entry is one routing entry in the at least one first routing entry, and the address of the external device included in the second routing entry is the same as the destination address of the data packet from the virtual machine. In this way, When the virtual machine needs to send a data packet to the external device, the virtual switch of the virtual machine can forward the data packet through the distributed gateway deployed on the virtual switch of the virtual machine according to the first flow entry, without manually distributing the data packet. The routing between the border gateway and the external device is configured on the gateway, so that the problem that the manual configuration routing workload is large when the distributed gateway is used in the prior art is solved; in addition, when the network topology changes, the embodiment of the present invention is used. The dynamic routing configuration method, the SDN controller can dynamically update the first routing entry according to the external routing information carried in the routing learning message, so that the routing between the border gateway and the external device can be dynamically adjusted to solve the problem in the prior art. Inconvenient adjustment of the gateway.

DRAWINGS

1 is a schematic structural diagram of an SDN according to an embodiment of the present invention;

2 is a flowchart of a dynamic routing configuration method according to an embodiment of the present invention;

3 is a flowchart of another dynamic routing configuration method according to an embodiment of the present invention;

4 is a flowchart of another dynamic routing configuration method according to an embodiment of the present invention;

FIG. 5 is a flowchart of another dynamic routing configuration method according to an embodiment of the present invention;

FIG. 6 is a flowchart of another dynamic routing configuration method according to an embodiment of the present invention;

FIG. 7 is a schematic structural diagram of an SDN controller according to an embodiment of the present invention;

8 is a schematic structural diagram of another SDN controller according to an embodiment of the present invention;

9 is a schematic structural diagram of another SDN controller according to an embodiment of the present invention;

10 is a schematic structural diagram of a dynamic routing proxy according to an embodiment of the present invention;

11 is a schematic structural diagram of another dynamic routing agent according to an embodiment of the present invention;

12 is a schematic structural diagram of another SDN controller according to an embodiment of the present invention;

FIG. 13 is a schematic structural diagram of another dynamic routing proxy according to an embodiment of the present invention;

14 is a schematic structural diagram of another dynamic routing agent according to an embodiment of the present invention;

FIG. 15 is a schematic structural diagram of a dynamic routing configuration system according to an embodiment of the present invention.

detailed description

The technical solutions in the embodiments of the present invention are clearly and completely described in the following with reference to the accompanying drawings in the embodiments of the present invention. It is obvious that the described embodiments are only a part of the embodiments of the present invention, but not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative efforts are within the scope of the present invention.

The embodiment of the present invention is applied to an SDN, and the SDN is connected to the external network through the border gateway. As shown in FIG. 1 , the SDN includes an SDN controller, at least two virtual machines, and a virtual switch of the virtual machine (that is, a virtual switch accessed by the virtual machine). ) and dynamic routing agents. Among them, multiple virtual machines can access the same virtual switch, but each virtual machine only accesses one virtual switch, that is, the virtual switch of each virtual machine is unique. The virtual switches of virtual machines and virtual machines are deployed on the server, and multiple virtual machines can be deployed on one server. Packets sent by the virtual machine can be forwarded to the external device through the forwarding of the distributed gateway and the border gateway. The dynamic routing proxy and the border gateway in the embodiment of the present invention perform control plane interaction through a dynamic routing protocol. The commonly used dynamic routing protocols include: Border Gateway Protocol (English: Border Dialog) (abbreviation: BGP) and Open Shortest Path First (OSPF). The description of the specific dynamic routing protocol can be Referring to the related description in the prior art, the embodiments of the present invention are not described herein again.

An embodiment of the present invention provides a dynamic routing configuration method, as shown in FIG. 2, including:

S101. The SDN controller receives a route learning message sent by a dynamic routing proxy.

The routing learning message carries the external routing information, and the external routing information is used to represent the routing relationship between the external device and the border gateway. The SDN controller may receive the route learning message after the initial configuration of the network is completed, or may receive the route learning message when the routing relationship between the external device and the border gateway changes. The external routing information can be used to characterize the routing relationship between an external device and the border gateway. The external routing information can also be used to characterize the routing relationship between multiple external devices and the border gateway.

It should be noted that the dynamic routing proxy in the embodiment of the present invention may be deployed on a virtual machine or deployed on a server, and the dynamic routing proxy is configured with a network card that can be used for communication with the border gateway. The dynamic routing proxy can be a functional module or a physical entity. When the dynamic routing proxy is deployed on the server, the server where the dynamic routing proxy is located can be called a dynamic routing proxy. Reason.

S102. The SDN controller updates the at least one first routing entry according to the external routing information.

A routing table is stored in the SDN controller. In the embodiment of the present invention, each item in the routing table is referred to as a routing entry. The routing table includes at least one first routing entry, and each of the first routing entries includes an address of an external device and an address of a border gateway through which the data packet is sent to the external device.

The address of the external device may be an Internet Protocol (IP) address of the external device, or may be a Media Access Control (MAC) address of the external device. Not limited.

The address of the border gateway may be an IP address of the border gateway or a MAC address of the border gateway, which is not limited in this embodiment of the present invention.

It should be noted that each of the first routing entries may also include a subnet mask, a priority, and the like. The format of the first routing entry may refer to the format of the routing table in the prior art. The format of the item is not limited.

S103. The SDN controller converts the second routing entry into the first flow entry when receiving the data packet from the virtual machine sent by the virtual switch of the virtual machine.

The second routing entry is a routing entry in the at least one first routing entry, and the address of the external device included in the second routing entry is the same as the destination address of the data packet from the virtual machine. The virtual machine is any one of at least two virtual machines.

The first flow entry is used to indicate the forwarding rule when the virtual switch of the virtual machine forwards the data packet. The embodiment of the present invention does not limit the format of the first flow entry. The format of the first flow entry may refer to the related description of the flow entry in the prior art.

S104. The SDN controller sends a first flow entry to the virtual switch of the virtual machine, to instruct the virtual switch of the virtual machine to forward the data packet from the virtual machine by using the distributed gateway deployed on the virtual switch of the virtual machine according to the first flow entry. .

Exemplarily, suppose that the virtual machine 1 (the virtual machine 1 is any one of the virtual machines included in the SDN) sends a data packet to the external device 1, and the IP address of the external device 1 is 10.10.10.5, then the virtual machine 1 first The data packet is sent to the virtual switch 1 (that is, the virtual switch of the virtual machine 1); the virtual switch 1 searches for the flow entry of the virtual switch 1 with the destination address of 10.10.10.5; if the virtual switch 1 stores the destination address as According to the flow entry of 10.10.10.5, the virtual switch 1 forwards the data packet through the distributed gateway deployed on the virtual switch 1 according to the flow entry; if the virtual switch 1 does not store the flow table with the destination address of 10.10.10.5 The virtual switch 1 sends the data packet to the SDN controller, and the SDN controller converts the second routing entry corresponding to the destination address into the first flow entry and sends it to the virtual switch 1, and the virtual switch 1 A first-class entry that forwards the packet through a distributed gateway deployed on virtual switch 1.

According to the dynamic routing configuration method provided by the embodiment of the present invention, the SDN controller updates at least one first routing entry according to the external routing information carried in the received routing learning message; the SDN controller receives the virtual machine (any included in the SDN) When the virtual switch of the virtual machine sends a data packet from the virtual machine, the second routing entry is converted into the first flow entry, and the first flow entry is sent to the virtual switch of the virtual machine, so that the virtual machine is enabled. The virtual switch forwards the data packet from the virtual machine through the distributed gateway deployed on the virtual switch of the virtual machine according to the first flow entry. The second routing entry is one routing entry in the at least one first routing entry, and the address of the external device included in the second routing entry is the same as the destination address of the data packet from the virtual machine. In this way, when the virtual machine needs to send a data packet to the external device, the virtual switch of the virtual machine can forward the data packet through the distributed gateway deployed on the virtual switch of the virtual machine according to the first flow entry, without manually The route between the border gateway and the external device is configured on the distributed gateway, so that the problem that the manual configuration routing workload is large when the distributed gateway is adopted in the prior art can be solved; in addition, when the network topology changes, the implementation of the present invention is adopted. In the dynamic routing configuration method, the SDN controller can dynamically update the first routing entry according to the external routing information carried in the routing learning message, so that the routing between the border gateway and the external device can be dynamically adjusted to solve the prior art. Inconvenient adjustment when using a distributed gateway.

Further, as shown in FIG. 3, the dynamic routing configuration method provided by the embodiment of the present invention may further include:

S105. The SDN controller obtains internal routing information from at least one third routing entry.

The routing table stored in the SDN controller includes at least one third routing entry in addition to at least one first routing entry. Each third routing entry in at least one third routing entry The address of the virtual machine and the address of the distributed gateway through which the data packet is sent to the virtual machine. The distributed gateway to be sent to the virtual machine is the distributed gateway deployed on the virtual switch of the virtual machine. The routing information is used to characterize the routing relationship between the virtual machine and the distributed gateway deployed on the virtual switch of the virtual machine.

It should be noted that a large-scale data center usually supports multiple tenants (tenants are users who use data center resources, for example, one enterprise can be one tenant), and multiple tenants share data center resources. The SDN controller in the embodiment of the present invention can also support scenarios of multiple tenants. Specifically, the SDN controller can store multiple routing tables, and each routing table corresponds to one tenant. The SDN controller can manage each routing table independently. Correspondingly, a plurality of dynamic routing proxy instances may be deployed on the dynamic routing proxy. Each dynamic routing proxy instance corresponds to one tenant, and each dynamic routing proxy instance may implement the function of the dynamic routing proxy in the embodiment of the present invention. The SDN controller can manage the lifecycle of all dynamic routing agent instances deployed on the dynamic routing agent.

S106. The SDN controller sends a first route advertisement message carrying internal routing information to the dynamic routing agent, where the first route advertisement message is used to instruct the dynamic routing agent to advertise internal routing information to the border gateway.

In this way, the border gateway can obtain the routing relationship between the virtual machine and the distributed gateway deployed on the virtual switch of the virtual machine. The border gateway can update the routing entries stored on the border gateway according to the internal routing information. When the external device sends a data packet to the virtual machine, the external device sends the data packet to the border gateway, and the border gateway forwards the data packet to the virtual switch of the virtual machine according to the routing entry stored on the border gateway. The deployed distributed gateway is then sent to the virtual machine by the distributed gateway deployed on the virtual switch of the virtual machine.

It should be noted that, in the embodiment of the present invention, S105-S106 may be executed before S101-S104, and S105-S106 may also be executed after S101-S104.

Further, before the SDN controller obtains the internal routing information from the at least one third routing entry, the SDN controller may obtain routing information of one of the at least two virtual machines, and generate the routing information according to the virtual machine. A third routing entry. The routing information of the virtual machine includes an address of the virtual machine and an address of a distributed gateway deployed on the virtual switch of the virtual machine.

Further, after the SDN controller generates the third routing entry according to the routing information of the virtual machine, the SDN controller may convert the third routing entry into the second flow entry and the virtual switch to the virtual machine. The second flow entry is sent, and the second flow entry may be used to indicate a forwarding rule when the virtual switch of the virtual machine forwards the data packet to the virtual machine.

Optionally, the SDN may further include a centralized gateway; the routing table stored in the SDN controller may further include a fourth routing entry; and the fourth routing entry includes the IP address of the network segment to which the virtual network IP address of the virtual machine belongs. Address and IP address of the centralized gateway.

The dynamic routing configuration method provided by the embodiment of the present invention may further include: the SDN controller obtains centralized routing information from the fourth routing entry, and the centralized routing information is used to represent the routing relationship between the virtual machine and the centralized gateway; the SDN controller A second route advertisement message carrying centralized routing information is sent to the dynamic routing agent, and the second route advertisement message is used to instruct the dynamic routing agent to issue centralized routing information to the border gateway.

It should be noted that, in the embodiment of the present invention, the third routing entry is different from the fourth routing entry, the third routing entry is a host routing, and the fourth routing entry is a network segment routing. The SDN controller can control the dynamic routing agent to issue host routes to the border gateway, and can also control the dynamic routing agent to advertise network segment routes to the border gateway. A distributed gateway switch can be set in the SDN controller. When the distributed gateway switch is turned on, the dynamic routing agent issues a host route to the border gateway, and the host route can be used to indicate the distributed time to be sent when each data packet is sent to each virtual machine. The gateway, for example, sends a packet to the virtual machine 1 with the IP address of 192.168.100.5 through the distributed gateway deployed on the virtual switch of virtual machine 1, and sends the packet to the virtual machine 2 with the IP address of 192.168.100.125. A distributed gateway deployed on the virtual switch of the virtual machine 2; when the distributed gateway switch is closed, the dynamic routing proxy advertises the network segment route to the border gateway, and the network segment route can be used to indicate that the virtual IP address belongs to the same network segment. The machine sends a packet through a centralized gateway. For example, when sending a packet to a virtual machine with an IP address of 192.168.100.1-192.168.100.255, it passes through a centralized gateway. In a multi-tenancy scenario, different tenants can use different gateways, for example, one tenant uses a distributed gateway and the other tenant uses a centralized gateway.

An embodiment of the present invention provides a dynamic routing configuration method, as shown in FIG. 4, including:

S201. The dynamic routing agent receives external routing information sent by the border gateway, where the external routing information is used to represent a routing relationship between the external device and the border gateway.

The dynamic routing agent may receive external routing information after the initial configuration of the network is completed, or may receive external routing information when the routing relationship between the external device and the border gateway changes.

The dynamic routing agent in the embodiment of the present invention may be deployed on a virtual machine or deployed on a server.

S202: The dynamic routing agent sends a route learning message carrying the external routing information to the SDN controller, so that the SDN controller updates the at least one first routing entry according to the external routing information, so that the SDN controller receives the virtual switch of the virtual machine. When the data packet from the virtual machine is sent, the second routing entry is converted into the first flow entry, and the first flow entry is sent to the virtual switch of the virtual machine.

Each of the first routing entries in the at least one first routing entry includes an address of an external device and an address of a border gateway to be sent when the data packet is sent to the external device; the second routing entry is at least one A routing entry in the first routing entry, the address of the external device included in the second routing entry is the same as the destination address of the data packet from the virtual machine, and the virtual machine is any one of the at least two virtual machines. .

Further, the dynamic routing agent may include: a "primary" dynamic routing agent and a "standby" dynamic routing agent. The "master" dynamic routing agent and the "standby" dynamic routing agent are two dynamic routing agents that are identical in function. Typically, the "master" dynamic routing agent runs. A "heartbeat" mechanism can be established between the SDN controller and the "master" dynamic routing agent, that is, the "master" dynamic routing agent can periodically send a custom structure (also called "heartbeat packet" or "" to the SDN controller. Heartbeat frame"), if the SDN controller can receive the "heartbeat packet" normally, the SDN controller can determine that the "primary" dynamic routing agent is operating normally; if the SDN controller cannot receive the "heartbeat packet" normally, the SDN controller It can be determined that the "main" dynamic routing agent is faulty or downtime. At this time, the SDN controller controls the "standby" dynamic routing agent to ensure reliability. For the specific content of the "heartbeat" mechanism and the specific format of the "heartbeat packet", reference may be made to the related description in the prior art, and the details of the embodiments of the present invention are not described in detail herein.

According to the dynamic routing configuration method provided by the embodiment of the present invention, the dynamic routing agent sends a route learning message carrying the external routing information to the SDN controller, so that the SDN controller updates at least one first routing entry according to the external routing information, thereby enabling SDN control. When receiving the data packet from the virtual machine sent by the virtual switch of the virtual machine, the device converts the second routing entry into the first flow entry and sends the first flow entry to the virtual switch of the virtual machine. In this way, the virtual switch of the virtual machine can forward the data packet from the virtual machine through the distributed gateway deployed on the virtual switch of the virtual machine according to the first flow entry, without manually configuring the border gateway and the external device on the distributed gateway. Inter-route, which can solve the problem of manual configuration routing when using distributed gateway in the prior art; in addition, when the network When the topology changes, the dynamic routing proxy in the embodiment of the present invention can obtain the routing relationship between the external device and the border gateway after the network topology change through the external routing information, and send the route to the SDN controller. The learning message indicates that the SDN controller dynamically updates the first routing entry, so that the route between the border gateway and the external device can be dynamically adjusted to solve the problem of inconvenient adjustment when the distributed gateway is used in the prior art.

Further, as shown in FIG. 5, the dynamic routing configuration method provided by the embodiment of the present invention may further include:

S203. The dynamic routing agent receives the first route advertisement message sent by the SDN controller.

The first route advertisement message carries internal routing information, and the internal routing information is used to represent a routing relationship between the virtual machine and the distributed gateway deployed on the virtual switch of the virtual machine.

S204. The dynamic routing agent issues internal routing information to the border gateway.

It should be noted that, in the embodiment of the present invention, S203-S204 may be performed before S201-S202, and S203-S204 may also be executed after S201-S202.

Further, the dynamic routing proxy may receive external routing information sent by the border gateway based on the dynamic routing protocol; the dynamic routing proxy may also issue internal routing information to the border gateway based on the dynamic routing protocol. The dynamic routing protocol can be BGP or OSPF.

Optionally, the SDN may further include a centralized gateway. The dynamic routing configuration method provided by the embodiment of the present invention may further include: the dynamic routing proxy receives the second route advertisement message sent by the SDN controller, where the second route advertisement message carries Centralized routing information is used to characterize the routing relationship between the virtual machine and the centralized gateway; the dynamic routing agent issues centralized routing information to the border gateway.

Further, the dynamic routing agent can also release the concentration to the border gateway based on the dynamic routing protocol. Routing information.

The embodiment of the invention further provides a method for configuring dynamic routing, as shown in FIG. 6, which includes:

S301. The dynamic routing agent receives external routing information sent by the border gateway.

The external routing information is used to represent a routing relationship between the external device and the border gateway. The dynamic routing agent can receive external routing information after the initial configuration of the network is completed, or receive external routing information when the routing relationship between the external device and the border gateway changes.

S302. The dynamic routing agent sends a route learning message carrying the external routing information to the SDN controller.

S303. The SDN controller updates the at least one first routing entry according to the external routing information.

The first routing entry in the at least one first routing entry includes an address of an external device and an address of a border gateway to be sent when the data packet is sent to the external device.

S304. The virtual machine 1 sends the data packet 1 to the virtual switch 1, and the destination address of the data packet 1 is the address of the external device 1.

The virtual machine 1 is any virtual machine included in the SDN, and the virtual switch 1 is a virtual switch of the virtual machine 1.

S305. The virtual switch 1 sends the data packet 1 to the SDN controller.

S306. The SDN controller converts the second routing entry into the first flow entry.

The second routing entry is a routing entry in the at least one first routing entry, and the address of the external device 1 included in the second routing entry.

S307. The SDN controller sends the first flow entry to the virtual switch 1 to instruct the virtual switch 1 to forward the data packet 1 through the distributed gateway deployed on the virtual switch 1 according to the first flow entry.

S308. The SDN controller obtains internal routing information from at least one third routing entry.

The routing table is stored in the SDN controller, and the routing table includes at least one first routing entry and at least one third routing entry. Each third routing entry in the at least one third routing entry contains a virtual The address of the virtual machine and the address of the distributed gateway through which the data packet is sent to the virtual machine. The distributed gateway to which the data packet is sent to the virtual machine is the distributed gateway deployed on the virtual switch of the virtual machine, and the internal route The information is used to characterize the routing relationship between the virtual machine and the distributed gateway deployed on the virtual switch of the virtual machine.

S309. The SDN controller sends a first route advertisement message carrying internal routing information to the dynamic routing agent.

S310. The dynamic routing agent issues internal routing information to the border gateway.

According to the dynamic routing configuration method provided by the embodiment of the present invention, the SDN controller updates at least one first routing entry according to the external routing information carried in the received routing learning message; the SDN controller receives the virtual machine 1 (included in the SDN) When the data packet 1 is sent by the virtual switch (virtual switch 1) of any virtual machine, the second routing entry is converted into the first flow entry, and the first flow entry is sent to the virtual switch 1 so that the virtual switch 1 is based on The first flow entry forwards the data packet 1 through the distributed gateway deployed on the virtual switch 1. The second routing entry is one routing entry in the at least one first routing entry, and the address of the external device included in the second routing entry is the same as the destination address of the data packet 1. In this way, when the virtual machine 1 needs to send the data packet 1 to the external device, the virtual switch 1 can forward the data packet 1 through the distributed gateway deployed on the virtual switch 1 according to the first flow entry, without manually using the distributed gateway. The configuration of the route between the border gateway and the external device is used to solve the problem that the manual configuration of the route is large when the distributed gateway is used in the prior art. In addition, when the network topology changes, the dynamics in the embodiment of the present invention are adopted. The routing configuration method, the SDN controller can dynamically update the first routing entry according to the external routing information carried in the routing learning message, so that the routing between the border gateway and the external device can be dynamically adjusted to solve the problem of using the distributed gateway in the prior art. When adjusting the inconvenient problem.

The embodiment of the invention further provides an SDN controller, which is applied to an SDN, where the SDN is connected to the external network through the border gateway, and the SDN includes: an SDN controller, at least two virtual machines, a virtual switch of the virtual machine, and a dynamic routing agent. A distributed gateway is deployed on the virtual switch of the virtual machine. As shown in FIG. 7, the SDN controller includes: a receiving unit 41, an updating unit 42, a route converting unit 43, and a first sending unit 44.

The receiving unit 41 is configured to receive a routing learning message sent by the dynamic routing agent, where the routing learning message carries external routing information, where the external routing information is used to represent a routing relationship between the external device and the border gateway.

The updating unit 42 is configured to update at least one first routing entry according to the external routing information, where each first routing entry in the at least one first routing entry includes an address of an external device and sends a data packet to the external device The address of the border gateway to pass through.

The route conversion unit 43 is configured to convert the second routing entry into the first flow entry when the data packet from the virtual machine sent by the virtual switch of the virtual machine is received, where the second routing entry is at least one first routing table A routing entry in the entry, the address of the external device included in the second routing entry is the same as the destination address of the data packet from the virtual machine, and the virtual machine is any one of the at least two virtual machines.

The first sending unit 44 is configured to send the first flow entry to the virtual switch of the virtual machine, to indicate that the virtual switch of the virtual machine forwards the virtual machine from the virtual machine through the distributed gateway deployed on the virtual switch of the virtual machine according to the first flow entry. data pack.

Further, as shown in FIG. 8, the SDN controller provided by the embodiment of the present invention further includes: an obtaining unit 45 and a second sending unit 46.

The obtaining unit 45 is configured to obtain internal routing information from at least one third routing entry, where each third routing entry in the at least one third routing entry includes an address of the virtual machine and when the data packet is sent to the virtual machine The address of the distributed gateway to pass through, the distributed gateway to be sent to the virtual machine is the distributed gateway deployed on the virtual switch of the virtual machine, and the internal routing information is used to represent the virtual switch of the virtual machine and the virtual machine. The routing relationship between deployed distributed gateways.

The second sending unit 46 is configured to send a first route advertisement message carrying internal routing information to the dynamic routing agent, where the first route advertisement message is used to instruct the dynamic routing agent to issue internal routing information to the border gateway.

The routing table is stored in the SDN controller, and the routing table includes at least one first routing entry and at least one third routing entry.

Further, the obtaining unit 45 is further configured to obtain routing information of the virtual machine before acquiring the internal routing information from the at least one third routing entry, where the routing information of the virtual machine includes the address of the virtual machine and the virtual switch of the virtual machine. The address of the deployed distributed gateway.

As shown in FIG. 9, the SDN controller further includes: a generating unit 47.

The generating unit 47 is configured to generate a third routing entry according to the routing information of the virtual machine.

Further, the route conversion unit 43 is further configured to convert the third routing entry into the second flow entry after the generating unit 47 generates the third routing entry according to the routing information of the virtual machine.

The first sending unit 44 is further configured to send a second flow entry to the virtual switch of the virtual machine.

Further, the dynamic routing agent can be deployed on the virtual machine, and the dynamic routing agent can also be deployed on the server.

Optionally, the SDN further includes a centralized gateway; the routing table further includes a fourth routing entry; the fourth routing entry includes an IP address of the network segment to which the Internet Protocol IP of the virtual machine belongs and an IP address of the centralized gateway.

The obtaining unit 45 is further configured to obtain centralized routing information from the fourth routing entry, where the centralized routing information is used to represent a routing relationship between the virtual machine and the centralized gateway.

The second sending unit 46 is configured to send a second route publishing message carrying the centralized routing information to the dynamic routing agent, where the second route publishing message is used to instruct the dynamic routing agent to issue centralized routing information to the border gateway.

It should be noted that the specific description of some of the functional modules in the SDN controller provided by the embodiment of the present invention may refer to the corresponding content in the method embodiment, and details are not described in detail in this embodiment.

According to the SDN controller provided by the embodiment of the present invention, the SDN controller updates at least one first routing entry according to the external routing information carried in the received routing learning message; the SDN controller receives the virtual machine (any one included in the SDN) When the virtual switch of the virtual machine sends a packet from the virtual machine, the second routing entry is converted into the first flow entry, and the first flow entry is sent to the virtual switch of the virtual machine, so that the virtual switch of the virtual machine is The first flow entry is deployed on the virtual switch of the virtual machine. The distributed gateway forwards the packet from the virtual machine. The second routing entry is one routing entry in the at least one first routing entry, and the address of the external device included in the second routing entry is the same as the destination address of the data packet from the virtual machine. In this way, when the virtual machine needs to send a data packet to the external device, the virtual switch of the virtual machine can forward the data packet through the distributed gateway deployed on the virtual switch of the virtual machine according to the first flow entry, without manually distributing the data packet. A route between the border gateway and the external device is configured on the gateway, so that the problem that the manual configuration of the route is large when the distributed gateway is used in the prior art is solved; in addition, when the network topology changes, the method in the embodiment of the present invention is adopted. The SDN controller can dynamically update the first routing entry according to the external routing information carried in the routing learning message, so that the routing between the border gateway and the external device can be dynamically adjusted to solve the problem of using the distributed gateway in the prior art. When adjusting the inconvenient problem.

The embodiment of the invention further provides a dynamic routing agent, which is applied to an SDN, and the SDN is connected to the external network through the border gateway. The SDN includes: an SDN controller, at least two virtual machines, a virtual switch of the virtual machine, and a dynamic routing agent. A distributed gateway is deployed on the virtual switch of the virtual machine. As shown in FIG. 10, the dynamic routing proxy includes: a receiving unit 51 and a sending unit 52.

The receiving unit 51 is configured to receive external routing information sent by the border gateway, where the external routing information is used to represent a routing relationship between the external device and the border gateway.

The sending unit 52 is configured to send a route learning message carrying the external routing information to the SDN controller, so that the SDN controller updates the at least one first routing entry according to the external routing information, so that the SDN controller receives the virtual machine virtual When the switch sends a packet from the virtual machine, the second routing entry is converted into the first flow entry, and the first flow entry is sent to the virtual switch of the virtual machine.

Further, the receiving unit 51 is further configured to receive the first route advertisement message sent by the SDN controller, where the first route advertisement message carries internal routing information, and the internal routing information is used to represent the virtual switch and the virtual machine on the virtual switch. The routing relationship between distributed gateways.

The sending unit 52 is further configured to issue internal routing information to the border gateway.

Further, as shown in FIG. 11, the dynamic routing agent further includes: a control unit 53.

The control unit 53 is configured to control the receiving unit 51 to receive external routing information sent by the border gateway based on the dynamic routing protocol.

The control unit 53 is further configured to control the sending unit 52 to issue internal routing information to the border gateway based on the dynamic routing protocol.

Optionally, the SDN also includes a centralized gateway.

The receiving unit 51 is further configured to receive a second route advertisement message sent by the SDN controller, where the second route advertisement message carries centralized routing information, where the centralized routing information is used to represent a routing relationship between the virtual machine and the centralized gateway;

The sending unit 52 is further configured to issue centralized routing information to the border gateway.

Further, the control unit 53 is further configured to control the sending unit 52 to issue centralized routing information to the border gateway based on the dynamic routing protocol.

It should be noted that the specific description of some of the functional modules in the dynamic routing agent provided by the embodiment of the present invention may refer to the corresponding content in the method embodiment, and details are not described in detail in this embodiment.

The dynamic routing agent provided by the embodiment of the present invention sends a route learning message carrying the external routing information to the SDN controller, so that the SDN controller updates at least one first routing entry according to the external routing information, thereby enabling the SDN controller. When receiving the data packet from the virtual machine sent by the virtual switch of the virtual machine, the second routing entry is converted into the first flow entry, and the first flow entry is sent to the virtual switch of the virtual machine. In this way, the virtual switch of the virtual machine can forward the data packet from the virtual machine through the distributed gateway deployed on the virtual switch of the virtual machine according to the first flow entry, without manually configuring the border gateway and the external device on the distributed gateway. In the prior art, the problem of manually configuring the routing workload when using the distributed gateway in the prior art can be solved. In addition, when the network topology changes, the dynamic routing proxy in the embodiment of the present invention can be used. The external routing information acquires the routing relationship between the external device and the border gateway after the network topology changes. Sending a route learning message to the SDN controller instructs the SDN controller to dynamically update the first routing entry, so that the route between the border gateway and the external device can be dynamically adjusted to solve the inconvenience of adjusting the distributed gateway in the prior art. problem.

The embodiment of the invention further provides an SDN controller, which is applied to an SDN, where the SDN is connected to the external network through the border gateway, and the SDN includes: an SDN controller, at least two virtual machines, a virtual switch of the virtual machine, and a dynamic routing agent. A distributed gateway is deployed on the virtual switch of the virtual machine. As shown in FIG. 12, the SDN controller includes a receiver 61, a processor 62, and a transmitter 63.

The receiver 61 is configured to receive a routing learning message sent by the dynamic routing agent, where the routing learning message carries external routing information, where the external routing information is used to represent a routing relationship between the external device and the border gateway.

The processor 62 is configured to update at least one first routing entry according to the external routing information, where each of the at least one first routing entry includes an address of an external device and sends a data packet to the external device. The address of the border gateway to pass through; when receiving the data packet from the virtual machine sent by the virtual switch of the virtual machine, converting the second routing entry into the first flow entry, and the second routing entry is at least one first A routing entry in the routing entry. The address of the external device included in the second routing entry is the same as the destination address of the packet from the virtual machine. The virtual machine is any one of the at least two virtual machines.

The sender 63 is configured to send the first flow entry to the virtual switch of the virtual machine to instruct the virtual switch of the virtual machine to forward the data packet from the virtual machine through the distributed gateway deployed on the virtual switch of the virtual machine according to the first flow entry. .

Further, the processor 62 is further configured to obtain internal routing information from the at least one third routing entry, where each third routing entry in the at least one third routing entry includes a virtual machine address and a virtual machine The address of the distributed gateway through which the data packet is sent. The distributed gateway that is sent when the data packet is sent to the virtual machine is the distributed gateway deployed on the virtual switch of the virtual machine. The internal routing information is used to represent the virtual machine and the virtual machine. The routing relationship between distributed gateways deployed on the virtual switch.

The sender 63 is further configured to send a first route advertisement message carrying the internal routing information to the dynamic routing agent, where the first route advertisement message is used to instruct the dynamic routing agent to issue the internal routing information to the border gateway.

Further, the processor 62 is further configured to obtain routing information of the virtual machine before acquiring the internal routing information from the at least one third routing entry, where the routing information of the virtual machine includes the address of the virtual machine and the virtual switch of the virtual machine. The address of the deployed distributed gateway; the SDN controller generates a third routing entry according to the routing information of the virtual machine.

Further, the processor 62 is further configured to convert the third routing entry into the second flow entry after the third routing entry is generated according to the routing information of the virtual machine.

The sender 63 is further configured to send a second flow entry to the virtual switch of the virtual machine.

The processor 62 is further configured to obtain centralized routing information from the fourth routing entry, where the centralized routing information is used to represent a routing relationship between the virtual machine and the centralized gateway.

The sender 63 is further configured to send a second route advertisement message carrying the centralized routing information to the dynamic routing agent, where the second route advertisement message is used to instruct the dynamic routing agent to issue the centralized routing information to the border gateway.

According to the SDN controller provided by the embodiment of the present invention, the SDN controller updates at least one first routing entry according to the external routing information carried in the received routing learning message; the SDN controller receives the virtual machine (any one included in the SDN) When the virtual switch of the virtual machine sends a packet from the virtual machine, the second routing entry is converted into the first flow entry, and the first flow entry is sent to the virtual switch of the virtual machine, so that the virtual switch of the virtual machine is The first flow entry forwards the data packet from the virtual machine through a distributed gateway deployed on the virtual switch of the virtual machine. The second routing entry is a first routing entry in the at least one first routing entry, and the address of the external device included in the second routing entry is The destination address of the packet from the virtual machine is the same. In this way, when the virtual machine needs to send a data packet to the external device, the virtual switch of the virtual machine can forward the data packet through the distributed gateway deployed on the virtual switch of the virtual machine according to the first flow entry, without manually distributing the data packet. A route between the border gateway and the external device is configured on the gateway, so that the problem that the manual configuration of the route is large when the distributed gateway is used in the prior art is solved; in addition, when the network topology changes, the method in the embodiment of the present invention is adopted. The SDN controller can dynamically update the first routing entry according to the external routing information carried in the routing learning message, so that the routing between the border gateway and the external device can be dynamically adjusted to solve the problem of using the distributed gateway in the prior art. When adjusting the inconvenient problem.

The embodiment of the invention further provides a dynamic routing agent, which is applied to an SDN, and the SDN is connected to the external network through the border gateway. The SDN includes: an SDN controller, at least two virtual machines, a virtual switch of the virtual machine, and a dynamic routing agent. A distributed gateway is deployed on the virtual switch of the virtual machine. As shown in FIG. 13, the dynamic routing proxy includes a receiver 71 and a transmitter 72.

The receiver 71 is configured to receive external routing information sent by the border gateway, where the external routing information is used to represent a routing relationship between the external device and the border gateway.

The sender 72 is configured to send a route learning message carrying the external routing information to the SDN controller, so that the SDN controller updates the at least one first routing entry according to the external routing information, so that the SDN controller receives the virtual machine virtual When the switch sends a packet from the virtual machine, the second routing entry is converted into the first flow entry, and the first flow entry is sent to the virtual switch of the virtual machine.

Further, the receiver 71 is further configured to receive a first route advertisement message sent by the SDN controller, where the first route advertisement message carries internal routing information, and the internal routing information is used to represent the virtual switch and the virtual machine on the virtual switch. The routing relationship between distributed gateways.

The transmitter 72 is further configured to issue internal routing information to the border gateway.

Further, as shown in FIG. 14, the dynamic routing agent further includes: a processor 73.

The processor 73 is configured to control the receiver 71 to receive external routing information sent by the border gateway based on the dynamic routing protocol. The control transmitter 72 issues internal routing information to the border gateway based on the dynamic routing protocol.

Optionally, the SDN also includes a centralized gateway.

The receiver 71 is further configured to receive a second route advertisement message sent by the SDN controller, where the second route advertisement message carries centralized routing information, where the centralized routing information is used to represent a routing relationship between the virtual machine and the centralized gateway.

The transmitter 72 is further configured to issue centralized routing information to the border gateway.

Further, the processor 73 is further configured to control the transmitter 72 to issue centralized routing information to the border gateway based on the dynamic routing protocol.

The dynamic routing agent provided by the embodiment of the present invention sends a route learning message carrying the external routing information to the SDN controller, so that the SDN controller updates at least one first routing entry according to the external routing information, thereby enabling the SDN controller. When receiving the data packet from the virtual machine sent by the virtual switch of the virtual machine, the second routing entry is converted into the first flow entry, and the first flow entry is sent to the virtual switch of the virtual machine. In this way, the virtual switch of the virtual machine can forward the data packet from the virtual machine through the distributed gateway deployed on the virtual switch of the virtual machine according to the first flow entry, without manually configuring the border gateway and the external device on the distributed gateway. In the prior art, the problem of manually configuring the routing workload when using the distributed gateway in the prior art can be solved. In addition, when the network topology changes, the dynamic routing proxy in the embodiment of the present invention can be used. The external routing information obtains the routing relationship between the external device and the border gateway after the network topology is changed, and sends a routing learning message to the SDN controller to instruct the SDN controller to dynamically update the first routing entry, thereby dynamically adjusting the border gateway and the external Routing between devices to solve the problem of inconvenient adjustment when using a distributed gateway in the prior art.

The embodiment of the invention further provides a dynamic routing configuration system, as shown in FIG. 15 , dynamic routing configuration. The system includes an SDN controller 81, at least two virtual machines 82, a virtual switch 83 of the virtual machine 82, and a dynamic routing agent 84. The virtual switch 83 is deployed with a distributed gateway.

The SDN controller 81 is configured to receive the routing learning message sent by the dynamic routing agent 84. The routing learning message carries external routing information, and the external routing information is used to represent the routing relationship between the external device and the border gateway; and is updated according to the external routing information. At least one first routing entry, each first routing entry in the at least one first routing entry includes an address of the external device and an address of the border gateway to be sent when sending the data packet to the external device; receiving the virtual When the data packet from the virtual machine 82 is sent by the switch 83, the second routing entry is converted into a first flow entry, and the second routing entry is a routing entry in the at least one first routing entry, and the second routing table is The address of the external device included in the item is the same as the destination address of the data packet from the virtual machine 82, and the virtual machine 82 is any one of the at least two virtual machines; the first flow entry is sent to the virtual switch 83 to indicate The virtual switch 83 forwards the data packets from the virtual machine 82 through the distributed gateway deployed on the virtual switch 83 according to the first flow entry.

The dynamic routing agent 84 is configured to receive the external routing information sent by the border gateway, and send the routing learning message carrying the external routing information to the SDN controller 81, so that the SDN controller 81 updates the at least one first routing entry according to the external routing information. When the SDN controller 81 receives the data packet from the virtual machine 82 sent by the virtual switch 83, the SDN controller 81 converts the second routing entry into the first flow entry and sends the first flow entry to the virtual switch 83.

In the dynamic routing configuration system provided by the embodiment of the present invention, the SDN controller updates at least one first routing entry according to the external routing information carried in the received routing learning message; the SDN controller receives the virtual machine (any included in the SDN) When a virtual switch of a virtual machine sends a packet from the virtual machine, the second routing entry is converted into the first flow entry, and the first flow entry is sent to the virtual switch of the virtual machine, so that the virtual switch of the virtual machine According to the first flow entry, the distributed gateway deployed on the virtual switch of the virtual machine forwards the data packet from the virtual machine. The second routing entry is a first routing entry in the at least one first routing entry, and the address of the external device included in the second routing entry is the same as the destination address of the data packet from the virtual machine. In this way, when the virtual machine needs to send a data packet to the external device, the virtual switch of the virtual machine can forward the data packet through the distributed gateway deployed on the virtual switch of the virtual machine according to the first flow entry, without manually distributing the data packet. The route between the border gateway and the external device is configured on the gateway, so that the distributed gateway in the prior art can be solved. When the network topology is changed, the SDN controller can dynamically update the first route according to the external routing information carried in the routing learning message. The table item can dynamically adjust the route between the border gateway and the external device to solve the problem of inconvenient adjustment when the distributed gateway is adopted in the prior art.

Through the description of the above embodiments, those skilled in the art can clearly understand that for the convenience and brevity of the description, only the division of the above functional modules is illustrated. In practical applications, the above functions can be allocated according to needs. It is completed by different functional modules, that is, the internal structure of the device is divided into different functional modules to complete all or part of the functions described above. For the specific working process of the system, the device and the unit described above, reference may be made to the corresponding process in the foregoing method embodiments, and details are not described herein again.

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

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

In addition, each functional unit in each embodiment of the present invention may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above integrated unit can be implemented in the form of hardware or in the form of a software functional unit.

The integrated unit, if implemented in the form of a software functional unit and sold or used as a standalone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present invention is essentially or a part contributing to the prior art or all or Portions may be embodied in the form of a software product stored in a storage medium, including instructions for causing a computer device (which may be a personal computer, server, or network device, etc.) or processor (English: Processor) Performing all or part of the steps of the method described in various embodiments of the invention. The foregoing storage medium includes: a USB flash drive, a mobile hard disk, a read-only memory (English: Read-Only Memory, abbreviation: ROM), a random access memory (English: Random Access Memory, abbreviation: RAM), a magnetic disk or an optical disk, and the like. A variety of media that can store program code.

The above is only a specific embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily think of changes or substitutions within the technical scope of the present invention. It should be covered by the scope of the present invention. Therefore, the scope of the invention should be determined by the scope of the appended claims.

Claims

A dynamic routing configuration method is applied to a software-defined network SDN. The SDN is connected to an external network through a border gateway, and the SDN includes: an SDN controller, at least two virtual machines, and the virtual machine. The virtual switch and the dynamic routing agent are deployed on the virtual switch of the virtual machine, and the method includes:

The SDN controller receives the route learning message sent by the dynamic routing agent, where the route learning message carries external routing information, where the external routing information is used to represent a routing relationship between the external device and the border gateway;

The SDN controller updates at least one first routing entry according to the external routing information, and each of the at least one first routing entry includes an address of the external device and the The address of the border gateway through which the external device sends the packet;

When the SDN controller receives the data packet from the virtual machine sent by the virtual switch of the virtual machine, the SDN controller converts the second routing entry into the first flow entry, where the second routing entry is the at least one a routing entry in the first routing entry, the address of the external device included in the second routing entry is the same as the destination address of the data packet from the virtual machine, and the virtual machine is the at least Any one of the two virtual machines;

The SDN controller sends the first flow entry to the virtual switch of the virtual machine to indicate that the virtual switch of the virtual machine is deployed through the virtual switch of the virtual machine according to the first flow entry. The gateway forwards the data packet from the virtual machine.
The method of claim 1 further comprising:

The SDN controller obtains internal routing information from at least one third routing entry, and each third routing entry in the at least one third routing entry includes an address of the virtual machine and the virtual The address of the distributed gateway to be sent when the server sends the data packet, and the distributed gateway to be sent when the data packet is sent to the virtual machine is a distributed gateway deployed on the virtual switch of the virtual machine, the internal route The information is used to characterize a routing relationship between the virtual machine and a distributed gateway deployed on a virtual switch of the virtual machine;

The SDN controller sends a first route advertisement message carrying the internal routing information to the dynamic routing agent, where the first route advertisement message is used to instruct the dynamic routing agent to advertise the internal routing information to a border gateway. ;

The routing table is stored in the SDN controller, and the routing table includes the at least one The first routing entry and the at least one third routing entry.
The method according to claim 2, wherein before the SDN controller obtains internal routing information from the at least one third routing entry, the method further includes:

The SDN controller acquires routing information of the virtual machine, where routing information of the virtual machine includes an address of the virtual machine and an address of a distributed gateway deployed on a virtual switch of the virtual machine;

The SDN controller generates the third routing entry according to the routing information of the virtual machine.
The method according to claim 3, wherein after the SDN controller generates the third routing entry according to the routing information of the virtual machine, the method further includes:

The SDN controller converts the third routing entry into a second flow entry, and sends the second flow entry to the virtual switch of the virtual machine.
The method according to any one of claims 1 to 4, wherein the dynamic routing agent is deployed on the virtual machine, or the dynamic routing agent is deployed on a server.
The method according to claim 5, wherein the SDN further includes a centralized gateway; the routing table further includes a fourth routing entry; and the fourth routing entry includes the virtual machine of the virtual network The IP address of the network segment to which the protocol IP belongs and the IP address of the centralized gateway;

The method further includes:

The SDN controller obtains centralized routing information from the fourth routing entry, where the centralized routing information is used to represent a routing relationship between the virtual machine and the centralized gateway;

The SDN controller sends a second route advertisement message carrying the centralized routing information to the dynamic routing agent, where the second route advertisement message is used to instruct the dynamic routing agent to advertise the centralized routing information to the border gateway. .
A dynamic routing configuration method is applied to a software-defined network SDN. The SDN is connected to an external network through a border gateway, and the SDN includes: an SDN controller, at least two virtual machines, and the virtual machine. The virtual switch and the dynamic routing agent are deployed on the virtual switch of the virtual machine, and the method includes:

The dynamic routing agent receives external routing information sent by the border gateway, where the external routing information is used to represent a routing relationship between the external device and the border gateway;

The dynamic routing agent sends a route learning message carrying the external routing information to the SDN controller, so that the SDN controller updates at least one first routing entry according to the external routing information, thereby enabling the SDN The controller sends the virtual switch that received the virtual machine. Converting the second routing entry into the first flow entry, and sending the first flow entry to the virtual switch of the virtual machine;

Each of the at least one first routing entry includes an address of the external device and an address of a border gateway to be sent when the data packet is sent to the external device; the second The routing entry is one of the at least one first routing entry, and the address of the external device included in the second routing entry is the same as the destination address of the data packet from the virtual machine. The virtual machine is any one of the at least two virtual machines.
The method of claim 7, wherein the method further comprises:

The dynamic routing agent receives the first route advertisement message sent by the SDN controller, where the first route advertisement message carries internal routing information, where the internal routing information is used to represent the virtual machine and the virtual machine. Routing relationship between distributed gateways deployed on the virtual switch;

The dynamic routing agent issues the internal routing information to the border gateway.
The method according to claim 8, wherein the dynamic routing agent receives the external routing information sent by the border gateway, including:

The dynamic routing agent receives the external routing information sent by the border gateway based on the dynamic routing protocol;

The dynamic routing agent issues the internal routing information to the border gateway, including:

The dynamic routing agent issues the internal routing information to the border gateway based on the dynamic routing protocol.
The method according to any one of claims 7-9, wherein the dynamic routing agent is deployed on the virtual machine, or the dynamic routing agent is deployed on a server.
The method according to claim 10, wherein the SDN further comprises a centralized gateway; the method further comprises:

The dynamic routing agent receives a second route advertisement message sent by the SDN controller, where the second route advertisement message carries centralized routing information, where the centralized routing information is used to represent the virtual machine and the centralized Routing relationship between gateways;

The dynamic routing agent issues the centralized routing information to the border gateway.
The method according to claim 11, wherein the dynamic routing agent issues the centralized routing information to the border gateway, including:

The dynamic routing agent issues the centralized path to the border gateway based on the dynamic routing protocol By information.
A software-defined network SDN controller is applied to an SDN, and the SDN is connected to an external network through a border gateway, where the SDN includes: the SDN controller, at least two virtual machines, and the virtual A virtual switch and a dynamic routing agent are deployed on the virtual switch of the virtual machine, and the SDN controller includes:

a receiving unit, configured to receive a routing learning message sent by the dynamic routing agent, where the routing learning message carries external routing information, where the external routing information is used to represent a routing relationship between the external device and the border gateway;

An update unit, configured to update at least one first routing entry according to the external routing information, where each of the at least one first routing entry includes an address of the external device and The address of the border gateway through which the external device sends the packet;

a route conversion unit, configured to convert a second routing entry into a first flow entry when the data packet from the virtual machine is sent by the virtual switch of the virtual machine, where the second routing entry is the at least a routing entry in a first routing entry, the address of the external device included in the second routing entry being the same as the destination address of the data packet from the virtual machine, where the virtual machine is Any one of at least two virtual machines;

a first sending unit, configured to send the first flow entry to the virtual switch of the virtual machine, to indicate that the virtual switch of the virtual machine is deployed on the virtual switch of the virtual machine according to the first flow entry The distributed gateway forwards the data packets from the virtual machine.
The SDN controller according to claim 13, wherein the SDN controller further comprises:

An obtaining unit, configured to obtain internal routing information from at least one third routing entry, where each third routing entry of the at least one third routing entry includes an address of the virtual machine and to the virtual The address of the distributed gateway to be sent when the server sends the data packet, and the distributed gateway to be sent when the data packet is sent to the virtual machine is a distributed gateway deployed on the virtual switch of the virtual machine, the internal route The information is used to characterize a routing relationship between the virtual machine and a distributed gateway deployed on a virtual switch of the virtual machine;

a second sending unit, configured to send, to the dynamic routing agent, a first route publishing message that carries the internal routing information, where the first route publishing message is used to instruct the dynamic routing agent to issue the internal to the border gateway Routing information;

The routing table is stored in the SDN controller, and the routing table includes the at least one first routing entry and the at least one third routing entry.
The SDN controller according to claim 14, wherein the obtaining unit is further configured to acquire routing information of the virtual machine before acquiring internal routing information from at least one third routing entry, The routing information of the virtual machine includes an address of the virtual machine and an address of a distributed gateway deployed on a virtual switch of the virtual machine;

The SDN controller further includes:

And a generating unit, configured to generate the third routing entry according to the routing information of the virtual machine.
The SDN controller according to claim 15, wherein the route conversion unit is further configured to: after the generating unit generates the third routing entry according to routing information of the virtual machine, The third routing entry is converted into the second flow entry.

The first sending unit is further configured to send the second flow entry to the virtual switch of the virtual machine.
The SDN controller according to any one of claims 13-16, wherein the dynamic routing agent is deployed on the virtual machine, or the dynamic routing agent is deployed on a server.
The SDN controller according to claim 17, wherein the SDN further includes a centralized gateway; the routing table further includes a fourth routing entry; and the fourth routing entry includes the virtual machine The IP address of the network segment to which the Internet Protocol IP belongs and the IP address of the centralized gateway;

The obtaining unit is further configured to obtain centralized routing information from the fourth routing entry, where the centralized routing information is used to represent a routing relationship between the virtual machine and the centralized gateway;

The second sending unit is configured to send, to the dynamic routing agent, a second route publishing message that carries the centralized routing information, where the second route publishing message is used to instruct the dynamic routing agent to issue a message to the border gateway. Centralized routing information.
A dynamic routing agent is applied to a software-defined network SDN, and the SDN is connected to an external network through a border gateway, where the SDN includes: an SDN controller, at least two virtual machines, and the virtual machine. The virtual switch and the dynamic routing agent are deployed on the virtual switch of the virtual machine, and the dynamic routing agent includes:

a receiving unit, configured to receive external routing information sent by the border gateway, where the external routing information is used to represent a routing relationship between the external device and the border gateway;

a sending unit, configured to send, to the SDN controller, a route learning message carrying the external routing information, so that the SDN controller updates at least one first routing entry according to the external routing information, thereby causing the SDN When receiving the data packet from the virtual machine sent by the virtual switch of the virtual machine, the controller converts the second routing entry into the first flow entry, and sends the first flow table to the virtual switch of the virtual machine. item;

Each of the at least one first routing entry includes an address of the external device and an address of a border gateway to be sent when the data packet is sent to the external device; the second The routing entry is one of the at least one first routing entry, and the address of the external device included in the second routing entry is the same as the destination address of the data packet from the virtual machine. The virtual machine is any one of the at least two virtual machines.
The dynamic routing agent according to claim 19, wherein the receiving unit is further configured to receive a first route advertisement message sent by the SDN controller, where the first route advertisement message carries internal routing information. The internal routing information is used to represent a routing relationship between the virtual machine and a distributed gateway deployed on a virtual switch of the virtual machine;

The sending unit is further configured to advertise the internal routing information to the border gateway.
The dynamic routing agent according to claim 20, wherein the dynamic routing agent further comprises:

a control unit, configured to control the receiving unit to receive external routing information sent by the border gateway according to a dynamic routing protocol;

The control unit is further configured to control the sending unit to release the internal routing information to the border gateway based on the dynamic routing protocol.
The dynamic routing agent according to any one of claims 19-21, wherein the dynamic routing agent is deployed on the virtual machine, or the dynamic routing agent is deployed on a server.
The dynamic routing agent according to claim 22, wherein the SDN further comprises a centralized gateway;

The receiving unit is further configured to receive a second route advertisement message sent by the SDN controller, where the second route advertisement message carries centralized routing information, where the centralized routing information is used to represent the virtual machine and the The routing relationship between the centralized gateways;

The sending unit is further configured to advertise the centralized routing information to the border gateway.
The dynamic routing agent according to claim 23, wherein the control unit is further configured to control the sending unit to issue the centralized routing information to the border gateway based on the dynamic routing protocol.
A dynamic routing configuration system, comprising: a software-defined network SDN controller, at least two virtual machines, a virtual switch of the virtual machine, and a dynamic routing agent, where the virtual machine is deployed on a virtual switch Have a distributed gateway;

The SDN controller is configured to receive a route learning message sent by the dynamic routing agent, where the route learning message carries external routing information, where the external routing information is used to represent a routing relationship between an external device and a border gateway. Updating at least one first routing entry according to the external routing information, where each of the at least one first routing entry contains an address of the external device and sends data to the external device The address of the border gateway to pass through when the packet is received; when receiving the data packet from the virtual machine sent by the virtual switch of the virtual machine, converting the second routing entry into the first flow entry, the second routing entry For one of the at least one first routing entry, the address of the external device included in the second routing entry is the same as the destination address of the data packet from the virtual machine, the virtual The machine is any one of the at least two virtual machines; the first flow entry is sent to the virtual switch of the virtual machine to indicate the virtual machine The proposed switch to the first flow table entry, the distributed virtual switch through the gateway of the virtual machine deployed forward the data packet from the virtual machine;

The dynamic routing agent is configured to receive the external routing information sent by the border gateway, and send the routing learning message that carries the external routing information to the SDN controller, so that the SDN controller is configured according to the Updating the at least one first routing entry by the external routing information, so that the SDN controller sends the second route when receiving the data packet from the virtual machine sent by the virtual switch of the virtual machine The entry is converted into the first flow entry, and the first flow entry is sent to the virtual switch of the virtual machine.