CN109104367B

CN109104367B - Method, network equipment and system for establishing tunnel

Info

Publication number: CN109104367B
Application number: CN201710476506.3A
Authority: CN
Inventors: 秦军; 孙东志; 董杰; 陈国义; 魏秀刚
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2017-06-21
Filing date: 2017-06-21
Publication date: 2021-11-30
Anticipated expiration: 2037-06-21
Also published as: CN109104367A

Abstract

The application discloses a method for establishing a tunnel, which comprises the following steps: the first network device receives a first message sent by the second network device, wherein the first message contains a first priority, the first message is used for indicating the first network device to establish a tunnel with the priority from the first network device to the second network device as the first priority, and the first priority is used for indicating the performance parameters of the tunnel to be established. The first network device establishes a first tunnel from the first network device to the second network device according to a first priority in the first message, wherein the priority of the first tunnel is the first priority. The second network device instructs the first network device to establish the tunnel with the priority level accepted by the second network device by sending the first message containing the first priority, so that the second network device can decide the priority for establishing the tunnel according to the resource use condition of the second network device, and network congestion caused by the limited processing capability of the second network device can be avoided.

Description

Method, network equipment and system for establishing tunnel

Technical Field

The present invention relates to the field of communications, and in particular, to a method, a network device, and a system for establishing a tunnel.

Background

With the development of network technology, users have higher and higher quality and efficiency of service transmission, and operators will establish tunnels with different priorities in a network and then forward different types of services using the tunnels with different priorities according to the requirements of the user services, for example: and forwarding the video service of the user by using the high-priority tunnel, forwarding the voice service of the user by using the low-priority tunnel, and the like. In the process of establishing tunnels with different priorities, an entry node of the tunnel determines the priority of establishing the tunnel and initiates the establishment of the tunnels with different priorities, and the establishment of the tunnels may cause network congestion.

Disclosure of Invention

The application provides a method, network equipment and a system for establishing a tunnel, which are used for solving the technical problem of network congestion caused by the method for establishing the tunnel in the prior art.

In a first aspect, an embodiment of the present application provides a method for establishing a tunnel, where the method includes:

the method comprises the steps that a first network device receives a first message sent by a second network device, wherein the first message comprises a first priority, the first message is used for indicating the first network device to establish a tunnel with the priority from the first network device to the second network device as the first priority, and the first priority is used for indicating performance parameters of the tunnel to be established. The first network device establishes a first tunnel from the first network device to the second network device according to the first priority in the first message, and the priority of the first tunnel is the first priority.

In the above technical solution, the second network device instructs the first network device to establish a tunnel with a certain priority by sending the first packet containing the first priority. That is, the priority of the tunnel is specified by the tail end of the tunnel, and the way of establishing the tunnel is more flexible. Further, according to the above scheme, the second network device may decide the priority for establishing the tunnel according to the resource usage of the second network device, and network congestion caused by the limited processing capability of the second network device may be avoided. For example, when the resource usage of the second network device exceeds a certain threshold and the service packet received through the tunnel with higher priority cannot be processed any more, the tunnel with lower priority may be established to receive the service packet, that is, the priority of the tunnel that the second network device can accept is sent to the first network device, so that network congestion caused by excessive occupation of the network resource of the second network device can be avoided.

In one possible design, the first network device maintains a second priority, the first network device has a capability of instructing the second network device to establish a tunnel with the second priority from the second network device to the first network device, and the second priority is used for indicating a performance parameter of the tunnel to be established, and the method further includes: and the first network device sends a second message containing the second priority to the second network device, wherein the second message is used for indicating the second network device to establish a second tunnel from the second network device to the first network device. The first network device instructs the second network device to establish the tunnel with the priority level accepted by the first network device by sending the second message containing the second priority, that is, the priority of the tunnel to be established is specified by the tail end of the tunnel, so that the first network device can decide to establish the priority of the tunnel from the second network device to the first network device according to the resource usage of the first network device, and network congestion caused by the limited processing capability of the first network device can be avoided.

In one possible design, the method further includes:

and when the first network equipment judges that the first priority is equal to the second priority, the first tunnel and the second tunnel form a bidirectional tunnel. When the first priority and the second priority are equal, the first tunnel and the second tunnel are set to be bidirectional tunnels, so that when bidirectional service requirements exist between the first network device and the second network device, service flows in two directions can be guaranteed to be forwarded according to the same priority, the consistency of bidirectional service transmission can be guaranteed, and user experience is improved.

In one possible design, the first packet further includes a first bandwidth, the first bandwidth is used to identify a bandwidth allocated by the second network device to the tunnel to be established, and after the first network device establishes the first tunnel from the first network device to the second network device according to the first priority in the first packet, the method further includes:

and when the first network equipment determines that the second bandwidth is smaller than or equal to the first bandwidth, setting the bandwidth of the first tunnel as the second bandwidth, wherein the second bandwidth is the bandwidth allocated to the first tunnel by the first network equipment. And when the first network equipment determines that the second bandwidth is larger than the first bandwidth, setting the bandwidth of the first tunnel as the first bandwidth. When the first tunnel is established, the bandwidth of the first tunnel is set by selecting the minimum value of the bandwidths which can be used by the first network equipment and the second network equipment, so that the reliability of the first tunnel in service flow transmission is improved.

In one possible design, the first packet further includes tunnel header node information, and the establishing, by the first network device, a first tunnel from the first network device to the second network device includes: and when the first network equipment determines that the first network equipment is the tunnel head node corresponding to the tunnel head node information according to the tunnel head node information, establishing the first tunnel. By carrying the tunnel head node information in the first message, the first network device can establish the first tunnel only when determining that the first network device is the tunnel head node corresponding to the tunnel head node information, so that the tunnel can be established according to the mode of the specified tunnel head node, the tunnel establishment mode is more flexible, and the flexible deployment of the tunnel by an operator is facilitated.

In one possible design, the first packet further includes a mesh group (mesh group) number, and the establishing, by the first network device, the first tunnel includes: and when the mesh group number of the first network equipment is judged to be the same as the mesh group number contained in the first message, determining that the first network equipment and the second network equipment belong to the same mesh group, and establishing the first tunnel. By comparing the mesh group numbers, the first network device can establish the first tunnel only when the first network device and the second network device are determined to belong to the same mesh group, so that the tunnel can be established only by the network devices in the same mesh group, and the resource waste of the network devices is avoided.

In one possible design, the First packet IS an Open Shortest Path First (OSPF) Link State Advertisement (LSA) or a Link State Protocol Data Unit (LSP) from an Intermediate System to an Intermediate System (IS-IS).

In one possible design, the performance parameter includes at least one of a delay, a packet loss rate, a bit error rate, and jitter.

In a second aspect, an embodiment of the present application provides a method for establishing a tunnel, including:

the method comprises the steps that a first network device receives a first message sent by a second network device, wherein the first message comprises a first priority, the first message is used for indicating the first network device to establish a tunnel with the priority from the first network device to the second network device as the first priority, and the first priority is used for indicating performance parameters of the tunnel to be established. The first network device stores a second priority, the second priority is used for establishing a tunnel with the priority of the second priority from the second network device to the first network device, when the first network device determines that the first priority is equal to the second priority, the establishment of a bidirectional tunnel between the first network device and the second network device is triggered, and the priority of the bidirectional tunnel is the first priority or the second priority.

In a third aspect, an embodiment of the present application provides a first network device for establishing a tunnel, including:

the receiving unit is configured to receive a first packet sent by a second network device, where the first packet includes a first priority, the first packet is used to instruct the first network device to establish a tunnel with a priority from the first network device to the second network device being the first priority, and the first priority is used to instruct a performance parameter of the tunnel to be established. A processing unit, configured to establish a first tunnel from the first network device to the second network device according to the first priority in the first message, where the priority of the first tunnel is the first priority.

In one possible design, the first network device stores a second priority, the first network device has a capability of instructing the second network device to establish a tunnel with the second priority from the second network device to the first network device, and the second priority is used to indicate a performance parameter of the tunnel to be established, and the first network device further includes:

a sending unit, configured to send a second packet including the second priority to the second network device, where the second packet is used to instruct the second network device to establish a second tunnel from the second network device to the first network device.

In one possible design, the first network device further includes: a first judging unit configured to judge whether the first priority is equal to the second priority;

the processing unit is further configured to form a bidirectional tunnel with the first tunnel and the second tunnel when the determining unit determines that the first priority is equal to the second priority.

In one possible design, the first packet further includes a first bandwidth, where the first bandwidth is used to identify a bandwidth allocated by the second network device for the tunnel to be established, and the first network device further includes:

a second determining unit, configured to determine a size relationship between a second bandwidth and the first bandwidth, where the second bandwidth is a bandwidth allocated to the first tunnel by the first network device;

the processing unit is further configured to set the bandwidth of the first tunnel as the second bandwidth when the second determining unit determines that the second bandwidth is smaller than or equal to the first bandwidth, and set the bandwidth of the first tunnel as the first bandwidth when the second bandwidth is determined to be larger than the first bandwidth.

In one possible design, the first packet further includes mesh group mesh information, and the first network device further includes:

a third judging unit, configured to determine whether the first network device and the second network device belong to the same mesh group according to the mesh group information;

the processing unit is further configured to establish the first tunnel when the third determining unit determines that the first network device and the second network device belong to the same mesh group according to the mesh group information.

In one possible design, the mesh group information includes a mesh group number,

the third determining unit is further configured to determine that the first network device and the second network device belong to the same mesh group when it is determined that the mesh group number of the first network device is the same as the mesh group number included in the first message.

In a fourth aspect, an embodiment of the present application provides a system for establishing a tunnel, where the system includes the first network device and the second network device described in the third aspect, where:

and the second network equipment is used for sending the first message to the first network equipment.

In a fifth aspect, an embodiment of the present application provides a network device, where the network device includes: a processor, a network interface, and a memory. The memory may be configured to store program code and the processor may be configured to invoke the program code in the memory to perform a method as designed by the preceding aspects. The specific execution steps can be referred to the foregoing aspects, and are not described herein.

In a sixth aspect, an embodiment of the present application provides a network device, where the network device includes: a main control board and an interface board. The main control board includes: a first processor and a second memory. The interface board includes: a second processor, a second memory, and an interface card. The main control board is coupled with the interface board. The second memory may be configured to store program code, and the second processor is configured to call the program code in the second memory to perform the following:

the method comprises the steps that a trigger interface card receives a first message sent by second network equipment, wherein the first message comprises a first priority, the first message is used for indicating the first network equipment to establish a tunnel with the priority from the first network equipment to the second network equipment as the first priority, and the first priority is used for indicating performance parameters of the tunnel to be established.

The first memory may be configured to store program code, and the first processor is configured to call the program code in the first memory to perform the following:

and establishing a first tunnel from the first network device to the second network device according to the first priority in the first message, wherein the priority of the first tunnel is the first priority.

In one possible design, an Inter-Process Communication protocol (IPC) control channel is established between the main control board and the interface board.

In a seventh aspect, a computer storage medium is provided for storing computer software instructions for the network device, which includes a program designed to execute the above aspects.

Drawings

In order to more clearly illustrate the technical solution of the present invention, the drawings used in the embodiments will be briefly described below. It should be apparent that the following drawings are only drawings of some embodiments of the invention, and it is obvious for a person skilled in the art that other technical solutions and drawings capable of implementing the invention also can be obtained according to the drawings without creative efforts.

Fig. 1 is a schematic diagram of a possible application scenario provided in an embodiment of the present invention;

fig. 2 is a schematic flowchart of a method for establishing a tunnel according to an embodiment of the present invention;

fig. 3 is a flowchart illustrating a method for establishing a tunnel according to an embodiment of the present invention;

fig. 4 is a flowchart illustrating a method for establishing a tunnel according to an embodiment of the present invention;

fig. 5 is a schematic view of a sub-TLV packet according to an embodiment of the present invention;

fig. 6 is a schematic view of a sub-TLV packet according to an embodiment of the present invention;

fig. 7 is a schematic diagram of a possible application scenario provided in the embodiment of the present invention;

fig. 8 is a schematic structural diagram of a network device according to an embodiment of the present invention;

fig. 9 is a schematic structural diagram of a network device according to an embodiment of the present invention;

fig. 10 is a schematic structural diagram of a network device according to an embodiment of the present invention;

fig. 11 is a schematic structural diagram of a system for establishing a tunnel according to an embodiment of the present invention.

Detailed Description

Embodiments of the present invention will be described below with reference to the accompanying drawings.

Referring to fig. 1, fig. 1 is a schematic diagram of an application network scenario of a method for establishing a tunnel according to an embodiment of the present application, where the network scenario includes a user edge device 105, a user edge device 106, a network edge device 107, a first network device 101, a second network device 102, and a third network device 103. The network device 101, the network device 102, and the network device 103 are Provider Edge (PE) devices, respectively connected to a user Edge device, and transmit a service traffic of a user. In the prior art, in order to implement transmission of service traffic from a user of a user edge device, a tunnel needs to be established between PE devices. For example, network device 101 establishes a tunnel from network device 101 to network device 102 to transport traffic from customer edge device 105 to customer edge device 107. Network device 101 establishes a tunnel from network device 101 to network device 103 to transport traffic from customer edge device 106 to customer edge device 107. When the network device 101 establishes multiple tunnels with the network device 102, the network device 101 may set a priority of each tunnel, and tunnels with different priorities are used for transmitting different service flows. For example, network device 101 establishes tunnel one, tunnel two, and tunnel three from network device 101 to network device 102. The priority of tunnel one is 1, the priority of tunnel two is 2, and the priority of tunnel three is 3. The different priorities of the different tunnels determine the performance parameters of the different tunnels. Wherein, the priority 1 of the tunnel one is higher than the priority 2 of the tunnel two. The priority 2 of tunnel two is higher than the priority 3 of tunnel three. When forwarding the traffic, the network device 101 may use a high-priority tunnel for transmitting the video traffic between users, for example, use tunnel one for transmitting. For voice traffic between users, a low priority tunnel may be used for transmission, for example, tunnel three. In practical applications, as the service requirement increases, the network device 101 may add a plurality of high priority tunnels to the network device 102 according to the added service requirement. Although the traffic of the user may be normally transmitted to the network device 102, the traffic may be backlogged from being processed in the network device 102 due to the limited processing capability of the traffic of the network device 102, thereby causing network congestion. In order to solve the foregoing technical problem, embodiments of the present application provide a method, a network device, and a system for establishing a tunnel, which are described below with reference to specific embodiments.

Referring to fig. 2, an embodiment of the present application provides a method for establishing a tunnel, where the method includes 201 and 202.

A second network device sends a first packet to a first network device, where the first packet includes a first priority, the first packet is used to indicate the first network device to establish a tunnel with a priority from the first network device to the second network device being the first priority, and the first priority is used to indicate a performance parameter of the tunnel to be established.

202, the first network device receives the first packet, and establishes a first tunnel from the first network device to the second network device according to the first priority in the first packet, where the priority of the first tunnel is the first priority.

Based on the application scenario shown in fig. 1, the network device 101 may be a first network device in the above method, and the network device 102 may be a second network device in the above method. When the network device 102 determines that the resource utilization rate of itself is higher than a certain threshold, a first packet is sent to the network device 101, where the first packet includes a first priority, and the first priority is a low priority. At this point, network device 102 triggers network device 101 to establish a low priority tunnel from network device 101 to network device 102. For example, when the network device 102 determines that the CPU occupancy is higher than 70% or the bandwidth occupancy is higher than 70%, the network device 101 sends a first packet including a first priority, where the first priority is 5. Network device 101 may establish a priority 5 tunnel from network device 101 to network device 102. Network device 101 may then use the tunnel to forward low priority traffic. The low priority traffic may be file transfer traffic. In another possible implementation manner, when the network device 102 determines that the resource usage rate of itself is lower than a certain threshold, a first packet is sent to the network device 101, where the first packet includes a first priority, and the first priority is a high priority. At this point, network device 102 triggers network device 101 to establish a high priority tunnel from network device 101 to network device 102. For example, when the network device 102 determines that the CPU occupancy is lower than 10% or the bandwidth occupancy is lower than 10%, the network device 101 sends a first packet with a first priority, where the first priority is 1. Network device 101 may establish a tunnel with priority 1 from network device 101 to network device 102. Network device 101 may then use the tunnel to forward high priority traffic. The high priority traffic may be video traffic. In one possible implementation, a smaller priority value represents a higher priority. It is to be understood that reference 201 to "the tunnel to be established" is said first tunnel.

In one possible implementation, the first network device stores a second priority. The first network device has a capability to instruct the second network device to establish a tunnel from the second network device to the first network device having a priority of the second priority. The second priority is used for indicating the performance parameters of the tunnel to be established. The method further comprises the following steps:

203, the first network device sends a second packet containing the second priority to the second network device, where the second packet is used to instruct the second network device to establish a second tunnel from the second network device to the first network device.

204, the second network device receives the second packet sent by the first network device, and establishes a second tunnel from the second network device to the first network device according to the second priority in the second packet, where the priority of the second tunnel is the second priority.

Based on the application scenario shown in fig. 1, when the network device 101 determines that the resource utilization rate of itself is lower than a certain threshold, a second packet is sent to the network device 102, where the second packet includes a second priority, and the second priority is a high priority. At this point, network device 101 triggers network device 102 to establish a high priority tunnel from network device 102 to network device 101.

In a possible implementation manner, the performance parameter of the tunnel includes at least one of a time delay, a packet loss rate, a bit error rate, a jitter, and a parameter capable of reflecting a forwarding performance of the tunnel.

In a possible implementation manner, the establishing, by the first network device, the first tunnel according to the first priority specifically includes: and the first network equipment establishes the first tunnel according to the performance parameters corresponding to the first priority. Namely: the first tunnel satisfies the requirements of the first performance parameter. For example: when the first priority indicates that the performance parameters of the tunnel to be established are: and if the delay is less than 10 milliseconds (ms), the first tunnel established by the first network device is required to satisfy the requirement that the transmission delay is within 10ms when the message is transmitted through the first tunnel.

205, when the first network device determines that the first priority is equal to the second priority, forming a bidirectional tunnel with the first tunnel and the second tunnel.

In one possible implementation, the forming, by the first network device, the first tunnel and the second tunnel into a bidirectional tunnel includes: binding the first tunnel and the second tunnel by manual configuration, thereby forming a bidirectional tunnel. The paths traversed by the first tunnel and the second tunnel may be the same or different.

In one possible implementation, the forming, by the first network device, the first tunnel and the second tunnel into a bidirectional tunnel includes: the first network device binds the first tunnel and the second tunnel by signaling. This signaling is encapsulated with a general Associated tunnel (G-Ach). The signaling carrying the tunnel information of the first network device is transmitted to the second network device along the first tunnel. Responding to a success message if the second network device is able to receive the message and satisfies a binding condition. And when the first network equipment receives the success message, the first network equipment determines that the first tunnel and the second tunnel are successfully bound to form a bidirectional tunnel.

After the bidirectional tunnel is formed, the first network device and the second network device can transmit interactive services, such as video call services, through the bidirectional tunnel, and due to the fact that the priorities of the bidirectional tunnel are the same, the synchronism of the services transmitted through the bidirectional tunnel between the first network device and the second network device can be improved, and therefore user experience is improved.

Referring to fig. 3, an embodiment of the present application provides a method for establishing a tunnel, where the method includes:

301, a first network device receives a first packet sent by a second network device, where the first packet includes a first priority, the first packet is used to instruct the first network device to establish a tunnel with a priority from the first network device to the second network device being the first priority, and the first priority is used to instruct a performance parameter of the tunnel to be established.

302, the first network device establishes a first tunnel from the first network device to the second network device according to the first priority in the first message, where the priority of the first tunnel is the first priority.

In a possible implementation manner, the first network device stores a second priority, the first network device has a capability of instructing the second network device to establish a tunnel with a priority from the second network device to the first network device being the second priority, and the second priority is used for indicating a performance parameter of the tunnel to be established, the method further includes:

and the first network device sends a second message containing the second priority to the second network device, wherein the second message is used for indicating the second network device to establish a second tunnel from the second network device to the first network device. The first network device instructs the second network device to establish a tunnel with a certain priority level by sending a second message containing a second priority, that is, the priority of the tunnel to be established is specified by the tail end of the tunnel, so that the first network device can decide to establish the priority of the tunnel from the second network device to the first network device according to the resource use condition of the first network device, and network congestion caused by the limited processing capability of the first network device can be avoided.

In one possible implementation, the method further comprises:

The first tunnel and the second tunnel may be a Label-switched path (LSP) or a Traffic Engineering (TE) tunnel or a Generic Routing Encapsulation (GRE) tunnel. The first tunnel and the second tunnel may be the same type of tunnel. Alternatively, the first tunnel and the second tunnel may be different types of tunnels. The embodiments of the present application are not particularly limited.

In a possible implementation manner, the first packet further includes a first bandwidth, where the first bandwidth is used to identify an available bandwidth of the second network device or is used to identify a bandwidth allocated by the second network device to the tunnel to be established, and after the first network device establishes a first tunnel from the first network device to the second network device according to the first priority in the first packet, the method further includes:

when the first network device determines that a second bandwidth is smaller than or equal to the first bandwidth, setting the bandwidth of the first tunnel as the second bandwidth, where the second bandwidth value is an available bandwidth of the first network device, or identifying a bandwidth allocated by the first network device for the first tunnel;

and when the first network equipment determines that the second bandwidth is larger than the first bandwidth, setting the bandwidth of the first tunnel as the first bandwidth.

When the first tunnel is established, the bandwidth of the first tunnel is set by selecting the minimum value of the bandwidths which can be used by the first network equipment and the second network equipment, so that the maximum transmission capability of the first tunnel is ensured, and the reliability of the first tunnel in service flow transmission is ensured.

In a possible implementation manner, the first packet further includes tunnel header node information, and the establishing, by the first network device, the first tunnel includes:

and when the first network equipment determines that the first network equipment is the tunnel head node corresponding to the tunnel head node information according to the tunnel head node information, establishing the first tunnel.

The tunnel header node information is information of a tunnel header node of a first tunnel to be established, and may specifically include: the address of the tunnel header node or the identity of the tunnel header node, etc. By carrying the tunnel head node information in the first packet, it is possible to specify the head node for establishing the first tunnel as required, that is: an ingress node of the first tunnel. And flexible deployment of the tunnel is realized.

In a possible implementation manner, the first packet further includes tunnel tail node information, and the establishing, by the first network device, the first tunnel includes:

and when the first network equipment determines that the first network equipment can establish a tunnel with the tunnel tail node corresponding to the tunnel tail node information according to the tunnel tail node information, establishing the first tunnel.

The tunnel end node information is information of a tunnel end node of the first tunnel to be established, and may specifically include: the address of the tunnel tail node or the identification of the tunnel tail node, etc. In this embodiment of the present invention, the tail node is the second network device. By carrying the tunnel tail node information in the first message, flexible deployment of the tunnel can be realized.

In a possible implementation manner, the first packet further includes a mesh group number, where the first packet includes the mesh group number and is used to indicate a mesh group to which the second network device belongs, and the establishing, by the first network device, the first tunnel includes:

and when the mesh group number of the first network equipment is judged to be the same as the mesh group number contained in the first message, determining that the first network equipment and the second network equipment belong to the same mesh group, and establishing the first tunnel.

In MPLS TE networks, a fully connected (full mesh) tunnel is typically established between Label Switching Routers (LSRs), such as: and (4) LSP tunnel. By including the mesh group number in the first message, the establishment of tunnels between network devices belonging to different mesh groups can be effectively avoided, network resources can be saved, and the waste of the network resources is avoided.

Referring to fig. 4, an embodiment of the present application provides a method for establishing a tunnel, where the method includes:

401, a first network device receives a first packet sent by a second network device, where the first packet includes a first priority, the first packet is used to instruct the first network device to establish a tunnel with a priority from the first network device to the second network device being the first priority, and the first priority is used to instruct a performance parameter of the tunnel to be established.

402, the first network device stores a second priority, the second priority is used for establishing a tunnel with a priority from the second network device to the first network device being the second priority, when the first network device determines that the first priority is equal to the second priority, the first network device initiates establishment of a bidirectional tunnel between the first network device and the second network device, and the priority of the bidirectional tunnel is the first priority or the second priority.

In a possible implementation manner of the foregoing embodiment, the first packet IS an OSPF LSA or IS an IS-IS LSP. The OSPF LSA may be an OSPF Router Information (RI) Link State Advertisement (LSA), and a new Value Length of sub-TLV (sub-Type Length Value) in the OSPF RI LSA includes the first priority or the second priority, where the sub-TLV is shown in fig. 5, where:

a Type (Type) field, configured to identify that the sub-TLV carries a tunnel priority, such as the aforementioned first priority or second priority;

a Length field for identifying the Length of the sub-TLV packet;

a Tunnel Priority (Tunnel Priority) field, configured to identify a first Priority carried by the first packet or a second Priority carried by the second packet;

a Tunnel identification (Tunnel ID) field for identifying an ID of a Tunnel to be established;

a Bandwidth (Bandwidth) field, configured to identify a first Bandwidth carried by the first packet, where the Bandwidth (Bandwidth) field is an optional field and may be added according to actual needs.

The IS-IS LSP may be implemented to carry the first priority by extending a sub-TLV at IS-IS Router Capability. The sub-TLV format can also be seen in fig. 4.

In one possible implementation, the new sub-TLV may be included in an OSPF TE-MESH-GROUP TLV, specifically, see fig. 6, which is in an OSPF TE-MESH-GROUP TLV format, where:

mesh-group number (mesh-group-number) for identifying the mesh-group number, for example: the first network equipment belongs to a mesh-group;

a Tail node Internet Protocol version 4 (IPv 4) address (Tail-end IPv4 address) field for identifying a Tail node of a tunnel to be established;

a Name Length field for identifying the Name Length of the tail node of the tunnel to be established;

a Tail-end name (Tail-end name) field for identifying the name of the Tail node of the tunnel to be established;

a sub-TLV field for carrying the message information with TLV shown in FIG. 5, the specific format is shown in FIG. 5.

Based on the method for establishing a tunnel shown in fig. 2 or fig. 3, an embodiment of the present application provides a specific implementation manner, and fig. 7 is a schematic view of an application scenario of the embodiment of the present application, where the method includes: network device a, network device B, and network device C. A first priority and a first bandwidth are configured on the network device a, the first priority is 1, the first bandwidth is 10 megabits per second (Mb/s), a second priority and a second bandwidth are configured on the network device B, the second priority is 1, the second bandwidth is 10M, a third priority and a third bandwidth are configured on the network device C, the third priority is 3, and the third bandwidth is 20M.

The network device A receives a first message sent by the network device B, the first message carries a second priority, and if the network device A judges that the first priority is equal to the second priority, the network device A initiates the establishment of a bidirectional tunnel between the network device A and the network device B, wherein the priority of the tunnel is 1. Optionally, the first packet further includes a second bandwidth, and when the network device a determines that the first bandwidth is the same as the second bandwidth, that is, 10Mb/s, the network device a sets the bandwidth of the bidirectional tunnel to 10 Mb/s. Optionally, in another implementation manner, after receiving the first packet, the network device a establishes a first tunnel from the network device a to the network device B, where the priority of the tunnel is a second priority, then the network device a sends a second packet to the network device B, where the second packet includes the first priority, and after receiving the second packet sent by the network device a, the network device B establishes a second tunnel from the network device B to the network device a, where the priority of the second tunnel is the first priority, and since the priority of the first tunnel is the same as the priority of the second tunnel, the network device a or the network device B forms a bidirectional tunnel with the first tunnel and the second tunnel.

And the network equipment A receives a third message sent by the network equipment C, wherein the third message contains a third priority, and if the network equipment A judges that the first priority is different from the third priority, the network equipment A establishes a unidirectional tunnel from the network equipment A to the network equipment C, and the priority of the tunnel is 2. Optionally, after the network device a receives the third packet sent by the network device C, the unidirectional tunnel with the priority of 2 from the network device a to the network device C may also be directly established without comparing the first priority with the third priority. Optionally, the third packet may further include a third bandwidth, and since the third bandwidth is larger than the first bandwidth, the network device a sets the bandwidth of the unidirectional tunnel to be the first bandwidth, that is: 10 Mb/s.

And the network equipment B receives a fourth message sent by the network equipment C, wherein the fourth message contains a third priority, and when the network equipment B judges that the second priority is different from the third priority, the network equipment B establishes a one-way tunnel from the network equipment B to the network equipment C, and the priority of the tunnel is 3. Optionally, after the network device B receives the fourth packet sent by the network device C, the unidirectional tunnel with the priority level of 3 from the network device B to the network device C may also be directly established without comparing the second priority level with the third priority level. Optionally, the fourth packet may further include a third bandwidth, and since the third bandwidth is larger than the first bandwidth, the network device B sets the bandwidth of the unidirectional tunnel to be the second bandwidth, that is: 10 Mb/s.

The network device C receives a fifth message sent by the network device a, where the fifth message includes a first priority, and when the network device C determines that the third priority is different from the first priority, the network device C establishes a unidirectional tunnel from the network device C to the network device a, where the priority of the tunnel is 1. Optionally, after the network device C receives the fifth packet sent by the network device a, the unidirectional tunnel with the priority of 1 from the network device C to the network device a may also be directly established without comparing the third priority with the first priority. Optionally, the fifth packet may further include a first bandwidth, and since the first bandwidth is smaller than the third bandwidth, the network device C sets the bandwidth of the unidirectional tunnel to be the first bandwidth, that is: 10 Mb/s.

And when the network device C judges that the third priority is different from the second priority, the network device C establishes a unidirectional tunnel from the network device C to the network device B, wherein the priority of the tunnel is 1. Optionally, after the network device C receives the fifth packet sent by the network device B, the unidirectional tunnel with the priority level of 1 from the network device C to the network device B may also be directly established without comparing the third priority level with the second priority level. Optionally, the sixth packet may further include a second bandwidth, and since the second bandwidth is smaller than the third bandwidth, the network device C sets the bandwidth of the unidirectional tunnel to be the second bandwidth, that is: 10 Mb/s.

Optionally, the first message, the second message, the third message, the fourth message, and the fifth message may further include the same mesh-group number, that is, a full mesh tunnel belonging to the same mesh-group may be established between network devices in the network shown in fig. 7.

Referring to fig. 8, an embodiment of the present application provides a network device 800 for establishing a tunnel in a network, where the network device 800 includes:

a receiving unit 801, configured to receive a first packet sent by a second network device, where the first packet includes a first priority, where the first packet is used to instruct the network device 800 to establish a tunnel with a priority from the network device 800 to the second network device being the first priority, and the first priority is used to instruct a performance parameter of the tunnel to be established;

a processing unit 802, configured to establish a first tunnel from the network device 800 to the second network device according to the first priority in the first message, where a priority of the first tunnel is the first priority.

The second network device instructs the network device 800 to establish a tunnel with a priority level that is acceptable to the second network device by sending the first packet containing the first priority, that is, the priority of the tunnel is specified by the tail end of the tunnel, so that the second network device can decide to establish the priority of the tunnel according to the resource usage of the second network device, and network congestion caused by the limited processing capability of the second network device can be avoided.

In a possible implementation manner, the network device 800 stores a second priority, and the network device 800 has a capability of instructing the second network device to establish a tunnel with the second priority from the second network device to the network device 800, where the second priority is used to indicate a performance parameter of the tunnel to be established. The performance parameters of the tunnel comprise at least one of time delay, packet loss rate, bit error rate, jitter and parameters capable of reflecting the forwarding performance of the tunnel. The network device 800 further comprises:

a sending unit, configured to send a second packet including the second priority to the second network device, where the second packet is used to instruct the second network device to establish a second tunnel from the second network device to the network device 800.

In one possible implementation manner, the network device 800 further includes:

a first judging unit configured to judge whether the first priority is equal to the second priority;

In a possible implementation manner, the first packet further includes a first bandwidth, where the first bandwidth is used to identify a bandwidth that can be used when the second network device establishes the first tunnel, and the network device 800 further includes:

a second determining unit, configured to determine a size relationship between a second bandwidth and the first bandwidth, where the second bandwidth is a bandwidth that can be used when the network device 800 establishes the first tunnel;

In a possible implementation manner, the first packet further includes tunnel header node information, and the network device 800 further includes:

a third determining unit, configured to determine, according to the tunnel header node information, whether the network device 800 is a tunnel header node corresponding to the tunnel header node information;

the processing unit establishing the first tunnel comprises:

when the third determining unit determines that the network device 800 is the tunnel head node corresponding to the head node information according to the tunnel head node information, the first tunnel is established.

In a possible implementation manner, the first packet further includes a mesh group number, and the network device 800 further includes:

a fourth determining unit, configured to determine whether a mesh group number of the network device 800 is the same as a mesh group number included in the first message;

the processing unit establishing the first tunnel comprises:

when the fourth determining unit determines that the mesh group number of the network device 800 is the same as the mesh group number included in the first message, it is determined that the network device 800 and the second network device belong to the same mesh group, and the first tunnel is established.

The network device 800 may be a router or a switch or a network device with a forwarding function, where the network device 800 can implement the function of the first network device in the embodiments shown in fig. 2, fig. 3, or fig. 4, and the specific execution steps may refer to the foregoing method embodiments, which are not described herein again.

Referring to fig. 9, an embodiment of the present application provides a network device 900, where the network device 900 may be a router or a switch or a network device with a forwarding function, and the network device 900 is capable of implementing the function of the first network device in the embodiments shown in fig. 2, fig. 3, or fig. 4. The network device 900 includes: a processor, a network interface, and a memory. The memory may be configured to store program codes and data of the network device, and the processor is configured to call the program instructions in the memory to execute the method shown in the foregoing embodiment, where specific execution steps may refer to the foregoing method embodiment and are not described herein again.

Referring to fig. 10, an embodiment of the present application provides a network device 1000. The network device 1000 includes: a main control board 1001 and an interface board 1002. The main control board 1001 includes: a processor 1003 and a memory 1004. The interface board 1002 includes: a processor 1005, memory 1006, and an interface card 1007. A master control board 1001 and an interface board 1002 are coupled. The memory 1006 may be used for storing program code of the interface board 1002, and the processor 1005 is used for calling the program code in the memory 1006 to perform the following operations:

the trigger interface card 1004 receives a first packet sent by a second network device, where the first packet includes a first priority, the first packet is used to instruct the network device 1000 to establish a tunnel with a priority from the network device 1000 to the second network device being the first priority, and the first priority is used to instruct a performance parameter of the tunnel to be established.

The memory 1004 may be configured to store program codes of the main control board 1001, and the processor 1003 is configured to call the program codes in the memory 1004 to perform the following operations:

establishing a first tunnel from the network device 1000 to a second network device according to the first priority in the first message, wherein the priority of the first tunnel is the first priority.

In a possible implementation manner, an Inter-Process Communication protocol (IPC) control channel is established between the main control board 1001 and the interface board 1002.

The network device 1000 may be a router or a switch or a network device with a forwarding function, where the network device 1000 can implement the function of the first network device in the embodiments shown in fig. 2, fig. 3, or fig. 4, and the specific execution steps may refer to the foregoing method embodiments, which are not described herein again.

Referring to fig. 11, an embodiment of the present application provides a system 1100 for establishing a tunnel, where the system 1100 includes a first network device 1101 and a second network device 1102, where:

the first network device 1101 is configured to receive a first packet sent by the second network device 1102, where the first packet includes a first priority, where the first packet is used to instruct the first network device 1101 to establish a tunnel with a priority from the first network device 1101 to the second network device 1102 being the first priority, and establish a first tunnel from the first network device 1101 to the second network device 1102 according to the first priority in the first packet, where the priority of the first tunnel is the first priority;

the second network device 1102 is configured to send the first packet to the first network device 1101.

The performance parameters of the tunnel comprise at least one of time delay, packet loss rate, bit error rate, jitter and parameters capable of reflecting the forwarding performance of the tunnel.

The network device 1101 may be a router or a switch or a network device with a forwarding function, where the network device 1101 can implement the function of the first network device in the embodiments shown in fig. 2, fig. 3, or fig. 4, and the specific execution steps may refer to the foregoing method embodiments, which are not described herein again.

Embodiments of the present application further provide a computer storage medium for storing computer software instructions for the first network device in the embodiments shown in fig. 2, 3, or 4, which includes a program for executing the method shown in the foregoing embodiments.

The "first" in the first network device mentioned in the embodiment of the present invention is only used for name identification, and does not represent the first in sequence. The rule applies equally to "second", "third" and "fourth".

Those skilled in the art will recognize that, in one or more of the examples described above, the functions described in this invention may be implemented in hardware, software, firmware, or any combination thereof. When implemented in software, the functions may be stored on or transmitted over as one or more instructions or code on a computer-readable medium. Computer-readable media includes both computer storage media and communication media including any medium that facilitates transfer of a computer program from one place to another. The storage medium may be any available medium that can be accessed by a general purpose or special purpose computer, for example, the storage medium may be at least one of the following: various media that can store program codes, such as Read-Only Memory (ROM), RAM, magnetic disk, or optical disk.

Finally, it should be noted that: the above embodiments are merely intended to illustrate the technical solutions of the present application, and not to limit the same; although the present application and the benefits derived therefrom have been described in detail with reference to the foregoing embodiments, those skilled in the art will appreciate that: modifications of the technical solutions described in the embodiments or equivalent replacements of some technical features may still be made.

Claims

1. A method for establishing a tunnel, comprising:

a first network device receives a first message sent by a second network device, wherein the first message contains a first priority, the first message is used for indicating the first network device to establish a tunnel with the priority from the first network device to the second network device as the first priority, and the first priority is used for indicating performance parameters of the tunnel to be established;

the first network device establishes a first tunnel from the first network device to the second network device according to the first priority in the first message, and the priority of the first tunnel is the first priority.

2. The method of claim 1, wherein the first network device maintains a second priority, wherein the first network device has a capability to instruct the second network device to establish a tunnel with the second priority from the second network device to the first network device, wherein the second priority is used to instruct performance parameters of the tunnel to be established, and wherein the method further comprises:

and the first network device sends a second message containing the second priority to the second network device, wherein the second message is used for indicating the second network device to establish a second tunnel from the second network device to the first network device.

3. The method of claim 2, further comprising:

and when the first network equipment judges that the first priority is equal to the second priority, the first tunnel and the second tunnel form a bidirectional tunnel.

4. The method according to any one of claims 1 to 3, wherein the first packet further includes a first bandwidth, the first bandwidth is used for identifying a bandwidth allocated by the second network device for the tunnel to be established, and after the first network device establishes the first tunnel from the first network device to the second network device according to the first priority in the first packet, the method further includes:

when the first network device determines that a second bandwidth is smaller than or equal to the first bandwidth, setting the bandwidth of the first tunnel as the second bandwidth, wherein the second bandwidth is a bandwidth allocated to the first tunnel by the first network device; or,

when the first network device determines that the second bandwidth is greater than the first bandwidth, setting the bandwidth of the first tunnel as the first bandwidth, where the second bandwidth is a bandwidth allocated to the first tunnel by the first network device.

5. The method according to any of claims 1 to 3, wherein the first packet further includes tunnel header node information, and the first network device establishing the first tunnel from the first network device to the second network device comprises:

6. The method according to any of claims 1 to 3, wherein the first packet further includes a mesh group number, the mesh group number indicating a mesh group to which the second network device belongs, and the first network device establishing the first tunnel from the first network device to the second network device comprises:

7. The method according to any of claims 1 to 3, wherein the performance parameter comprises at least one of a delay, a packet loss rate, a bit error rate, a jitter, and a parameter capable of embodying a forwarding performance of the tunnel.

8. A first network device for establishing a tunnel, comprising:

a receiving unit, configured to receive a first packet sent by a second network device, where the first packet includes a first priority, where the first packet is used to instruct the first network device to establish a tunnel with a priority from the first network device to the second network device being the first priority, and the first priority is used to instruct a performance parameter of the tunnel to be established;

a processing unit, configured to establish a first tunnel from the first network device to the second network device according to the first priority in the first message, where the priority of the first tunnel is the first priority.

9. The first network device of claim 8, wherein the first network device maintains a second priority, wherein the first network device has a capability of instructing the second network device to establish a tunnel from the second network device to the first network device with the second priority, wherein the second priority is used to indicate a performance parameter of the tunnel to be established, and wherein the first network device further comprises:

10. The first network device according to claim 9, further comprising a first judgment unit;

the first judging unit is configured to judge whether the first priority is equal to the second priority;

11. The first network device according to any one of claims 8 to 10, wherein the first packet further includes a first bandwidth, the first bandwidth is used to identify a bandwidth allocated by the second network device for the tunnel to be established, and the first network device further includes a second determining unit;

the second determining unit is configured to determine a size relationship between a second bandwidth and the first bandwidth, where the second bandwidth is a bandwidth allocated to the first tunnel by the first network device;

12. The first network device according to any one of claims 8 to 10, wherein the first packet further includes tunnel header node information, and the first network device further includes:

a third judging unit, configured to determine, according to the tunnel header node information, whether the first network device is a tunnel header node corresponding to the tunnel header node information;

the processing unit establishing the first tunnel comprises:

and when the third judging unit determines that the first network device is the tunnel head node corresponding to the head node information according to the tunnel head node information, establishing the first tunnel.

13. The first network device according to any one of claims 8 to 10, wherein the first packet further includes a mesh group mesh number, and the first network device further comprises:

a fourth determining unit, configured to determine whether a mesh group number of the first network device is the same as a mesh group number included in the first message;

the processing unit establishing the first tunnel comprises:

when the fourth judging unit judges that the mesh group number of the first network device is the same as the mesh group number contained in the first message, it is determined that the first network device and the second network device belong to the same mesh group, and the first tunnel is established.

14. A network device to establish a tunnel, the network device comprising: main control board and interface board, the main control board includes: a first processor and a first memory, the interface board comprising: the main control board is coupled to the interface board, the second memory is used for storing program codes of the interface board, and the second processor is used for calling the program codes in the second memory to execute the following operations:

triggering the interface card to receive a first message sent by second network equipment, wherein the first message comprises a first priority, the first message is used for indicating the network equipment to establish a tunnel with the priority from the network equipment to the second network equipment as the first priority, and the first priority is used for indicating the performance parameters of the tunnel to be established;

the first memory is used for storing the program codes of the main control board, and the first processor is used for calling the program codes in the first memory to execute the following operations:

and establishing a first tunnel from the network equipment to the second network equipment according to the first priority in the first message, wherein the priority of the first tunnel is the first priority.

15. A system for establishing a tunnel, the system comprising a first network device and a second network device, wherein:

the first network device is configured to receive a first packet sent by the second network device, where the first packet includes a first priority, the first packet is used to indicate that the first network device establishes a tunnel with a priority from the first network device to the second network device being the first priority, the first priority is used to indicate a performance parameter of the tunnel to be established, and according to the first priority in the first packet, a first tunnel is established from the first network device to the second network device, and the priority of the first tunnel is the first priority;