CN111865792A

CN111865792A - BSID management method, routing equipment and readable storage medium

Info

Publication number: CN111865792A
Application number: CN202010745152.XA
Authority: CN
Inventors: 郭威
Original assignee: Hangzhou H3C Technologies Co Ltd
Current assignee: New H3C Information Technologies Co Ltd
Priority date: 2020-07-29
Filing date: 2020-07-29
Publication date: 2020-10-30
Anticipated expiration: 2040-07-29
Also published as: CN111865792B

Abstract

The present specification provides a BSID management method, a routing device, and a readable storage medium, the method including: receiving flow to be forwarded, judging whether the flow to be forwarded is forwarded through a segmented routing strategy SR-Policy tunnel, generating a BSID when the flow to be forwarded is determined to be forwarded through the SR-Policy tunnel, sending the flow to be forwarded through the SR-Policy tunnel according to the BSID, and not generating the BSID when the flow to be forwarded is determined not to be forwarded through the SR-Policy tunnel. By the method, the BSID can be generated according to the forwarding requirement, and the traffic to be forwarded can be forwarded according to the BSID.

Description

BSID management method, routing equipment and readable storage medium

Technical Field

The present disclosure relates to the field of communications technologies, and in particular, to a method for managing BSID, a routing device, and a readable storage medium.

Background

SR-Policy (Segment Routing Policy) provides a flexible forwarding path selection method, and meets different forwarding requirements of users. When a plurality of paths exist between a source node and a destination node of a Segment Routing network, SR-TE Policy is reasonably utilized to select a forwarding path, which not only facilitates the management and planning of the network by an administrator, but also can effectively reduce the forwarding pressure of network equipment.

SR-Policy may include BSID (Binding Segment Identifier), Color (attribute of forwarding path), End-point (SR-Policy destination node, which may be identified by IP address).

After receiving the message with the stack top label being BSID, the device selects the corresponding effective SR-Policy forwarding flow according to the BSID, and if the BSID is matched with a plurality of effective SR-Policy tunnels, the device selects the SR-Policy forwarding flow according to the sequence of the configured BSID. SR-Policy, which configures BSID first, is preferentially selected to forward traffic.

Disclosure of Invention

The present specification provides a method for managing BSID, a routing device, and a readable storage medium, which can generate BSID according to a forwarding requirement, and forward a traffic to be forwarded according to BSID.

An embodiment of the present specification provides a method for managing BSID, where the method is applied to a first routing device, and the method includes:

receiving traffic to be forwarded;

judging whether the traffic to be forwarded is forwarded through a segmented routing strategy SR-Policy tunnel;

when the flow is determined to be forwarded through the SR-Policy tunnel, generating a BSID, and sending the flow to be forwarded through the SR-Policy tunnel according to the BSID;

when it is determined not to forward through the SR-Policy tunnel, no BSID is generated.

It can be seen from the foregoing embodiments that, when forwarding a traffic to be forwarded, it is determined whether forwarding needs to be performed through an SR-Policy tunnel, if so, a BSID is generated, and if not, the BSID is not generated, thereby solving the technical problem in the prior art that the BSID is generated for the traffic to be forwarded, which causes resource waste.

Optionally, the method for determining whether the traffic to be forwarded is forwarded through the segment routing Policy SR-Policy tunnel specifically includes:

judging whether a notification for indicating self generation of the BSID is received;

and when the notification is received, determining that the traffic to be forwarded is forwarded through a segmented routing strategy SR-Policy tunnel.

Optionally, the notification is sent by a second routing device connected to the first routing device or a controller connected to the first routing device.

Optionally, the sending the traffic to be forwarded through the SR-Policy tunnel according to the BSID specifically includes:

and iterating the traffic to be forwarded to an SR-Policy tunnel corresponding to the BSID according to the BSID, and sending the traffic to be forwarded through the SR-Policy tunnel.

Optionally, when the first routing device meets a preset condition;

sending a notification for indicating the second routing equipment to generate the BSID to the second routing equipment so that the second routing equipment generates the BSID according to the notification, and sending the flow in the second routing equipment through SR-Policy according to the BSID;

wherein the preset conditions include: a new neighbor relation, or a new port.

Optionally, the notification further includes attribute information of a forwarding path, so that the second routing device generates a BSID according to the notification, and determines an SR-Policy tunnel for sending traffic to be forwarded according to the attribute information of the forwarding path and the BSID.

An embodiment of the present specification further provides a routing device, where a segment routing Policy SR-Policy operates in the routing device, and the routing device includes:

the receiving module is used for receiving the flow to be forwarded;

the judging module is used for judging whether the traffic to be forwarded is forwarded through a segmented routing strategy SR-Policy tunnel;

the processing module is used for generating a BSID when the flow to be forwarded is determined to be forwarded through the SR-Policy tunnel, and sending the flow to be forwarded through the SR-Policy tunnel according to the BSID; or when determining not to forward through the SR-Policy tunnel, not generating BSID.

Optionally, the determining module is further configured to determine whether a notification for instructing the self to generate the BSID is received;

and when the judging module determines that the notification is received, determining that the traffic to be forwarded is forwarded through a segmented routing strategy SR-Policy tunnel.

An embodiment of the present specification further provides a routing device, where the routing device includes: a processor and a machine-readable storage medium:

the machine-readable storage medium stores machine-executable instructions executable by the processor, the processor being caused by the machine-executable instructions to: implementing any of the embodiments described above.

Embodiments of the present specification also provide a machine-readable storage medium storing machine-executable instructions that, when invoked and executed by a processor, cause the processor to: implementing any of the embodiments described above.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present specification and together with the description, serve to explain the principles of the specification.

Fig. 1 is a flowchart illustrating a method for managing a binding segment identifier BSID according to an embodiment of the present disclosure.

Detailed Description

Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present specification. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the specification, as detailed in the appended claims.

The terminology used in the description herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the description. As used in this specification and the appended claims, the singular forms "a", "an", and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It should also be understood that the term "and/or" as used herein refers to and encompasses any and all possible combinations of one or more of the associated listed items.

It should be understood that although the terms first, second, third, etc. may be used herein to describe various information, these information should not be limited to these terms. These terms are only used to distinguish one type of information from another. For example, the first information may also be referred to as second information, and similarly, the second information may also be referred to as first information, without departing from the scope of the present specification. The word "if" as used herein may be interpreted as "at … …" or "when … …" or "in response to a determination", depending on the context.

Because the BSID is used as the top label judgment, the BSID applies for occupying a local label resource, in the SR, the head node often occupies more label resources and has higher pressure, and not all BSIDs are actually useful, for example, in some cases, the head node is only used as a label for encapsulating the head of the tunnel in the direction, and in this case, the packet with the top label is not received, but is only a normal IP packet. However, in the prior art, the system generates the BSID without distinguishing the situation, which results in resource waste.

To solve the foregoing technical problem, an embodiment of the present specification provides a method for managing a binding segment identifier BSID, where as shown in fig. 1, the method is applied to a first routing device, and the method includes:

s101, receiving traffic to be forwarded;

s102, judging whether the traffic to be forwarded is forwarded through a segmented routing strategy SR-Policy tunnel;

s103, when the flow is determined to be forwarded through the SR-Policy tunnel, generating a BSID, and sending the flow to be forwarded through the SR-Policy tunnel according to the BSID;

s104, when determining not to forward through the SR-Policy tunnel, not generating BSID.

In this embodiment, after receiving the traffic to be forwarded, the first routing device may determine, through step S102, whether the traffic to be forwarded is forwarded through the SR-Policy tunnel, generate the BSID if the traffic to be forwarded is forwarded through the SR-Policy tunnel, and not generate the BSID if the traffic to be forwarded is not forwarded through the SR-Policy tunnel.

Specifically, in step S102, the method for determining whether the traffic to be forwarded is forwarded through the segment routing Policy SR-Policy tunnel may include:

In one case, the first routing device may be connected to the controller, and when the manager considers that the first routing device needs to generate the BSID, a notification instructing the first routing device to generate the BSID may be transmitted to the first routing device through the controller.

In another case, the second routing device connected to the first routing device may send the notification to the first routing device, for example, when the second routing device determines that there is a newly added neighbor relationship, it may be considered that there is a possibility that the packet needs to be forwarded through the SR-Policy tunnel, and at this time, the notification may be sent to the first routing device.

In step S103, when it is determined that the traffic to be forwarded needs to be forwarded through the SR-Policy tunnel, the traffic to be forwarded may be iterated into the SR-Policy tunnel according to the generated BSID, so as to send the traffic to be forwarded through the SR-Policy tunnel.

In another embodiment, the first routing device may set a trigger condition for sending a notification to other routing devices to notify the other routing devices of generating the BSID notification, for example, when receiving a new neighbor relation sent by the other routing devices, the first routing device may send the notification to the other routing devices.

Specifically, when the first routing device meets a preset condition, sending a notification to the second routing device, where the notification is used to instruct the second routing device to generate a BSID, so that the second routing device generates the BSID according to the notification, and sends a flow in the second routing device through SR-Policy according to the BSID, where the preset condition includes: a new neighbor relation, or a new port.

In the SR-Policy technology, the SR-Policy tunnels corresponding to the attribute information (e.g., Color attribute) of different forwarding paths may further include Color information, so that after the routing device receiving the notification generates the BSID, it may determine, according to the Color information, to use the BSID for the SR-Policy tunnels, so that the packet to be forwarded is forwarded in the SR-Policy tunnel corresponding to the Color.

It can be seen from the above embodiments that, when forwarding a packet to be forwarded, a routing device may determine whether forwarding needs to be performed through an SR-Policy tunnel, if so, generate a BSID, and if not, do not generate the BSID, so that it is not necessary to generate BSIDs for all packets, and tag resources are saved.

Based on the same idea concept as the foregoing method embodiment, this specification further provides a routing device, where a segment routing Policy SR-Policy operates in the routing device, and the routing device includes:

the receiving module is used for receiving the flow to be forwarded;

The judging module is also used for judging whether a notice for indicating the self to generate the BSID is received or not;

the machine-readable storage medium stores machine-executable instructions executable by the processor, the processor being caused by the machine-executable instructions to: the above embodiments are realized.

Embodiments of the present specification also provide a machine-readable storage medium storing machine-executable instructions that, when invoked and executed by a processor, cause the processor to: the above embodiments are realized.

The foregoing description has been directed to specific embodiments of this disclosure. Other embodiments are within the scope of the following claims. In some cases, the actions or steps recited in the claims may be performed in a different order than in the embodiments and still achieve desirable results. In addition, the processes depicted in the accompanying figures do not necessarily require the particular order shown, or sequential order, to achieve desirable results. In some embodiments, multitasking and parallel processing may also be possible or may be advantageous.

Other embodiments of the present description will be apparent to those skilled in the art from consideration of the specification and practice of the invention disclosed herein. This specification is intended to cover any variations, uses, or adaptations of the specification following, in general, the principles of the specification and including such departures from the present disclosure as come within known or customary practice within the art to which the specification pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the specification being indicated by the following claims.

It will be understood that the present description is not limited to the precise arrangements described above and shown in the drawings, and that various modifications and changes may be made without departing from the scope thereof. The scope of the present description is limited only by the appended claims.

The above description is only a preferred embodiment of the present disclosure, and should not be taken as limiting the present disclosure, and any modifications, equivalents, improvements, etc. made within the spirit and principle of the present disclosure should be included in the scope of the present disclosure.

Claims

1. A management method for Binding Segment Identifiers (BSIDs), which is applied to a first routing device, comprises:

receiving traffic to be forwarded;

2. The method according to claim 1, wherein the method for determining whether the traffic to be forwarded is forwarded through a segment routing Policy SR-Policy tunnel specifically comprises:

3. The method of claim 2, wherein the notification is sent by a second routing device connected to the first routing device or a controller connected to the first routing device.

4. The method according to claim 1, wherein the sending the traffic to be forwarded through the SR-Policy tunnel according to the BSID specifically includes:

5. The method of claim 1, further comprising:

when the first routing equipment meets a preset condition;

wherein the preset conditions include: a new neighbor relation, or a new port.

6. The method of claim 5, wherein the notification further includes attribute information of a forwarding path, so that the second routing device generates a BSID according to the notification, and determines an SR-Policy tunnel for sending traffic to be forwarded according to the attribute information of the forwarding path and the BSID.

7. A routing device, wherein a segment routing Policy (SR-Policy) is run in the routing device, and the routing device comprises:

the receiving module is used for receiving the flow to be forwarded;

8. The routing device of claim 7, wherein the determination module,

the system is also used for judging whether a notice for indicating the self generation of the BSID is received or not;

9. A routing device, characterized in that the routing device comprises: a processor and a machine-readable storage medium:

the machine-readable storage medium stores machine-executable instructions executable by the processor, the processor being caused by the machine-executable instructions to: implementing the functionality of any of claims 1-6.

10. A machine-readable storage medium having stored thereon machine-executable instructions that, when invoked and executed by a processor, cause the processor to: implementing the functionality of any of claims 1-6.