CN116112449A - A message forwarding method, device and storage medium - Google Patents

Abstract

The invention discloses a message forwarding method, a message forwarding device and a storage medium, wherein the method comprises the steps of receiving a message, searching an MAC address table according to information carried by the message, and obtaining the information of an output port of the message; judging whether the output port information is a link aggregation group according to the output port information; responding to the judgment that the output port information is a link aggregation group, and further judging whether the number of member ports in the link aggregation group is larger than zero; and responding to the judging result, calculating a hash value according to the information carried by the message, and selecting a corresponding member port to forward the message according to the hash value, or performing flooding in a corresponding forwarding domain. The invention can effectively solve the problem of packet loss when the link of the output port is interrupted.

Description

A message forwarding method, device and storage medium

technical field

The invention relates to the technical field of network communication, in particular to a message forwarding method, a device and a storage medium for realizing the message forwarding method.

Background technique

In the existing switching chip, the forwarding information of the data link layer is obtained by searching the MAC address table. Wherein, for the link aggregation port, the link aggregation group information is stored in the MAC address table. For non-link aggregation ports, the MAC address table stores real outgoing port information. When the link aggregation group information corresponding to the forwarding information is obtained by looking up the MAC address table, it is necessary to further calculate the hash value according to the information carried in the message, and select an outbound port from the link aggregation group to forward the message according to the calculated hash value. arts. However, when the information obtained by searching the MAC address table is non-link aggregation group information, the obtained outgoing port directly forwards the message.

When a link interruption occurs on an outbound port, the CPU is notified in the form of an interruption, and the CPU further takes an action of deleting all MAC address tables related to the outbound port. However, there is a certain time interval from the occurrence of a link failure on the egress port to the deletion of the MAC address table, during which packet loss may occur in packets passing through the switching chip.

Contents of the invention

The purpose of the present invention is to provide a message forwarding method, which can effectively solve the problem of packet loss when the outbound link is interrupted, and meanwhile, provide a device and a storage medium for realizing the message forwarding method.

In order to achieve the above object, the present invention proposes a message forwarding method, and the message forwarding method includes the following steps:

Receive the message and search the MAC address table according to the information carried in the message to obtain the outgoing port information of the message;

judging whether it is a link aggregation group according to the egress port information;

In response to judging that it is a link aggregation group according to the outgoing port information, further judging whether the number of member ports in the link aggregation group is greater than zero;

In response to the judgment result, a hash value is calculated according to the information carried in the message, and a corresponding member port is selected to forward the message according to the hash value, or flooding is performed in a corresponding forwarding domain.

Preferably, the message forwarding method also includes:

In response to judging that it is a non-link aggregation group according to the outgoing port information, further searching the port link status table according to the outgoing port information;

In response to the search result, perform flooding in the corresponding forwarding domain or forward the packet to the egress port.

Preferably, when the link state of the outbound port is found to be interrupted, flooding is performed in the corresponding forwarding domain; when the state of the port link is found to be non-interrupted, the packet is forwarded to the outbound port.

Preferably, when it is judged that the number of member ports in the link aggregation group is greater than zero, the hash value is calculated according to the information carried in the message and the member port for forwarding the message is selected using the hash value and the number of member ports; When the number of member ports in the group is equal to zero, flooding is performed in the corresponding forwarding domain.

Preferably, the number of member ports in the link aggregation group is updated through the following steps:

Obtain the outgoing port whose link status has changed;

judging whether the egress port is a member port in the link aggregation group;

In response to determining that the port is a member port in the link aggregation group, adding the outgoing port to the link aggregation group or deleting the outgoing port from the link aggregation group according to the link status of the outgoing port, and updating the port link state table.

Preferably, when the link state of the outgoing port is interrupted, the outgoing port is deleted from the link aggregation group, and the value corresponding to the outgoing port in the port link state table is configured as a first preset value; when the outgoing port When the link state of the port is non-interrupted, the outgoing port is added to the link aggregation group, and the value corresponding to the outgoing port in the port link state table is configured as a second preset value.

Preferably, it also includes:

In response to determining that the port is a non-member port in the link group, the port link state table is updated according to the link state of the outgoing port.

Preferably, it is characterized in that the message forwarding device includes:

The outgoing port acquisition module is used to receive the message and search the MAC address table according to the information carried by the message to obtain the outgoing port information of the message;

A first judging module, configured to judge whether it is a link aggregation group according to the outgoing port information;

The second judging module is used to further judge whether the number of member ports in the link aggregation group is greater than zero when the first judging module judges that the port information is the link aggregation group;

The message processing module is used to respond to the judgment result of the second judgment module, calculate a hash value according to the information carried in the message, and select a corresponding member port to forward the message according to the hash value, or perform flooding in the corresponding forwarding domain.

The present invention also discloses a message forwarding device, which includes:

at least one processor;

and at least one memory, said at least one memory being coupled to said at least one processor and storing a computer program for execution by said at least one processor, said computer program being executed by said at least one processor such that The device performs any one of the methods described above.

The present invention also discloses a computer-readable storage medium, on which a computer program is stored, and when the computer program is executed by a machine, the method described in any one of the above-mentioned methods is realized.

The beneficial effects of the present invention are:

The present invention records the link state of the outgoing port through the port link state table, and when the link state of the outgoing port is interrupted, or the number of member ports in the link aggregation group is zero, through flood processing, it can solve the problem caused by the outgoing port. The packet loss problem occurs when the link is interrupted on the port.

Description of drawings

Fig. 1 is a flowchart of a message forwarding method in an embodiment of the present invention;

Fig. 2 is a flow chart of message processing;

Fig. 3 is a flow chart of updating the number of member ports in the link aggregation group;

Fig. 4 is a structural block diagram of a message forwarding device in an embodiment of the present invention.

Detailed ways

The technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the present invention.

The message forwarding method disclosed by the present invention is suitable for message forwarding processing after the outbound link is interrupted, and can effectively avoid the situation of packet loss.

As shown in FIG. 1 and FIG. 2, a message forwarding method disclosed by the present invention includes the following steps:

S100. Receive the message and search the MAC address table according to the information carried in the message to obtain the outgoing port information of the message;

Specifically, the message carries information such as a MAC address and a forwarding domain number (FID). After receiving the message, the MAC address table is searched according to the MAC address carried in the message and the forwarding domain number. By searching the MAC address table, the outbound port information of the message can be obtained, and the outbound port information can be used for forwarding and processing of subsequent messages.

S200, judging whether it is a link aggregation group according to the outbound port information;

S300, in response to judging that it is a link aggregation group according to the outgoing port information, further judge whether the number of member ports in the link aggregation group is greater than zero;

Specifically, after the outbound port information is obtained by searching the MAC address table, it is further judged whether it is a link aggregation group. During implementation, for a link aggregation group, the number corresponding to the link aggregation group is stored in the MAC address table, and for the link aggregation group, the actual outgoing port is stored in the MAC address table. Therefore, it can be determined whether it is a link aggregation group according to the content stored in the MAC address table, that is, whether the port information is determined to be a number corresponding to the link aggregation group or a real outgoing port.

When it is determined as a link aggregation group, it is further determined whether the number of member ports in the link aggregation group is zero. When it is determined that it is not a link aggregation group, the link state corresponding to the outgoing port in the port information is further judged. When the link state of the egress port is down (Down), the message is flooded (Flooding) in the forwarding domain corresponding to the MAC address table. When the link state of the egress port is uninterrupted (UP), the packet is forwarded to the egress port.

Further, as shown in Figure 3, the number of member ports in the link aggregation group can be updated according to the link status of the ports, that is, member ports can be added or deleted according to the link status of the ports, while the number of outgoing ports The link state can be recorded through the port link state table. During implementation, the port link state table can record the link state of the outgoing port by assigning a value, such as when the link state of the outgoing port is interrupted (Down), the value corresponding to the outgoing port is the first preset value, For example, the first default value is 1. When the link state of the outgoing port is non-interrupted (Up), the value corresponding to the outgoing port is the second preset value, such as the second preset value is 0, the first preset value and the second preset value The specific assignment can be set according to actual needs.

When adding or deleting a member port, when the link status of the outgoing port is down (Down), judge whether the outgoing port belongs to a link aggregation group, that is, judge whether the outgoing port is a member port in the link aggregation group . When it is determined that the outgoing port is a member port in a link aggregation group, the number of members in the link aggregation group is reduced by one, and at the same time the outgoing port is deleted from the link aggregation group, and the outgoing port The link state of the link is recorded in the port link state table, for example, the value corresponding to the outgoing port in the port link state table is set to 1. When it is determined that the outgoing port is not a member port in a link aggregation group, record the link state of the outgoing port in the port link state table, such as setting the corresponding value of the outgoing port in the port link state table to 1.

When the link state of the outgoing port is uninterrupted (UP), it is judged whether the outgoing port belongs to a link aggregation group, that is, it is judged whether the outgoing port is a member port in the link aggregation group. When it is determined that the outgoing port is a member port in a link aggregation group, the number of members in the link aggregation group is increased by one, and the outgoing port is added to the link aggregation group at the same time, and the The link state is recorded in the port link state table, for example, the value corresponding to the outgoing port in the port link state table is set to zero. When it is determined that the outgoing port is not a member port in a link aggregation group, record the link state of the outgoing port in the port link state table, such as setting the corresponding value of the outgoing port in the port link state table to zero.

S400. In response to the judgment result, calculate a hash value according to the information carried in the message, and select a corresponding member port to forward the message according to the hash value, or perform flooding in a corresponding forwarding domain.

Specifically, for a link aggregation group, whether to perform flooding processing in a corresponding forwarding domain may be determined according to the number of member ports in the link aggregation group. When it is determined that the number of member ports in the link aggregation group is greater than zero, it means that there is a valid member port in the link aggregation group, then further calculate the corresponding hash value according to the information carried in the message, such as the source MAC address, and further The hash value is used to perform modulo processing on the number of members of the link aggregation group, so as to select the corresponding egress port. After the egress port is selected, the packet is further forwarded to the egress port.

When it is determined that the number of member ports in the link aggregation group is zero, it means that there is no valid member port in the link aggregation group, and the message is flooded in the corresponding forwarding domain.

As shown in FIG. 4 , the present invention also discloses a message forwarding device. The message forwarding device includes a message receiving module, an outbound port acquisition module, a first judging module, a second judging module and a message processing module. Wherein, the message receiving module is used to receive the message; the output port acquisition module is used to search the MAC address table according to the information carried by the message, and obtains the output port information of the message; the first judging module is used to judge whether it is is a link aggregation group; the second judging module is used to further judge whether the number of member ports in the link aggregation group is greater than zero when the first judging module judges that the port information is a link aggregation group; the message processing module is used to respond Based on the judgment result of the second judging module, the hash value is calculated according to the information carried in the message, and the corresponding member port is selected to forward the message according to the hash value, or flooding is performed in the corresponding forwarding domain. How each module realizes the corresponding function, please refer to the above for details and will not go into details here.

Further, the message forwarding device also includes a search processing module, which is used to further search the port link state table according to the outgoing port information when the first judging module judges that it is a non-link aggregation group according to the outgoing port information and according to the search result in the Flood in the corresponding forwarding domain or forward the packet to the egress port. During implementation, when searching the port link state table according to the outgoing port information and finding that the outgoing port link state is interrupted (Down), flooding is carried out in the corresponding forwarding domain; when searching the port link state table according to the outgoing port information and finding When the link state of the port is not interrupted (Up), the packet is forwarded to the egress port.

The present invention also discloses a message forwarding device, which includes a memory, a processor and a calculator program, wherein the calculator program is stored in the processor and can run in the processor, such as a message forwarding program and the like. During implementation, when the processor executes the calculator program, various steps in the above-mentioned message forwarding method can be implemented, such as realizing the steps of searching the MAC address table according to the information carried in the message, obtaining the outgoing port information of the message, and the like.

Exemplarily, the computer program can be divided into one or more units, and the one or more units are stored in the memory and executed by the memory to complete the present invention. Wherein, one or more units may be a series of computer program instruction segments capable of completing specific functions, and the computer program instruction segments are used to describe the execution process of the computer program in the message forwarding device.

The present invention also discloses a computer-readable storage medium, where a computer program is stored in the computer-readable storage medium, and when the computer program is executed by a processor, the above message forwarding method can be realized. Wherein, the computer program includes computer program code, and the computer program code may be in the form of source code, executable file, or some intermediate form, etc., and the computer-readable medium may include any entity capable of carrying the computer program code Or device, recording medium, U disk, mobile hard disk, magnetic disk, optical disk, computer memory, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), etc.

The present invention records the link state of the outgoing port through the port link state table, and when the link state of the outgoing port is interrupted, or the number of member ports in the link aggregation group is zero, through flood processing, it can solve the problem caused by the outgoing port. The packet loss problem occurs when the link is interrupted on the port.

The technical contents and technical characteristics of the present invention have been disclosed above, but those skilled in the art may still make various replacements and modifications based on the teachings and disclosures of the present invention without departing from the spirit of the present invention. Therefore, the protection scope of the present invention should not be limited to The content disclosed in the embodiment should include various replacements and modifications that do not depart from the present invention, and are covered by the claims of this patent application.

Claims (10)

1. The message forwarding method is characterized by comprising the following steps:

receiving a message and searching an MAC address table according to information carried by the message to obtain the output port information of the message;

judging whether the output port information is a link aggregation group or not according to the output port information;

responding to the output port information to judge that the output port information is a link aggregation group, and further judging whether the number of member ports in the link aggregation group is larger than zero;

and responding to the judging result, calculating a hash value according to the information carried by the message, and selecting a corresponding member port to forward the message according to the hash value, or performing flooding in a corresponding forwarding domain.

2. The message forwarding method according to claim 1, the message forwarding method further comprising:

responding to the judgment that the port information is a non-link aggregation group according to the port information, and searching a port link state table according to the port information;

and responding to the search result, flooding in the corresponding forwarding domain or forwarding the message to the output port.

3. The message forwarding method according to claim 2, wherein when the link state of the egress port is found to be an interrupt, flooding is performed in the corresponding forwarding domain; and when the link state of the port is found to be non-interrupt, forwarding the message to the output port.

4. The method for forwarding the message according to claim 1, when the number of the member ports in the link aggregation group is determined to be greater than zero, calculating a hash value according to the information carried by the message and selecting the member ports for forwarding the message by using the hash value and the number of the member ports; and when the number of the member ports in the link aggregation group is judged to be equal to zero, flooding is carried out in the corresponding forwarding domain.

5. The method for forwarding a message according to claim 1, wherein the number of member ports in the link aggregation group is updated by:

acquiring an output port with a changed port link state;

judging whether the output port is a member port in a link aggregation group or not;

and in response to judging that the port is a member port in the link aggregation group, adding the output port into the link aggregation group or deleting the output port from the link aggregation group according to the link state of the output port, and simultaneously updating a port link state table.

6. The method for forwarding a packet according to claim 5, wherein when the link state of the output port is interrupted, the output port is deleted from the link aggregation group, and a value corresponding to the output port in the port link state table is configured as a first preset value; when the link state of the output port is uninterrupted, the output port is added into the link aggregation group, and the value corresponding to the output port in the port link state table is configured to be a second preset value.

7. The method for forwarding a message according to claim 5, further comprising:

and in response to judging that the port is a non-member port in the link group, updating a port link state table according to the link state of the output port.

8. A message forwarding device, wherein the message forwarding device comprises:

the output port acquisition module is used for receiving the message and searching the MAC address table according to the information carried by the message to acquire the output port information of the message;

the first judging module is used for judging whether the output port information is a link aggregation group or not according to the output port information;

the second judging module is used for further judging whether the number of the member ports in the link aggregation group is larger than zero when the first judging module judges that the port information is the link aggregation group;

and the message processing module is used for responding to the judging result of the second judging module, calculating a hash value according to the information carried by the message and selecting a corresponding member port to forward the message according to the hash value, or performing flooding in a corresponding forwarding domain.

9. A message forwarding device, wherein the message forwarding device comprises:

at least one processor;

and at least one memory coupled to the at least one processor and storing a computer program for execution by the at least one processor, the computer program, when executed by the at least one processor, causing the apparatus to perform the method of any one of claims 1 to 7.

10. A computer readable storage medium having stored thereon a computer program which, when executed by a machine, implements the method according to any of claims 1 to 7.

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