CN111698142B - Message forwarding method and device, electronic equipment and storage medium - Google Patents
Message forwarding method and device, electronic equipment and storage medium Download PDFInfo
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- CN111698142B CN111698142B CN202010455433.1A CN202010455433A CN111698142B CN 111698142 B CN111698142 B CN 111698142B CN 202010455433 A CN202010455433 A CN 202010455433A CN 111698142 B CN111698142 B CN 111698142B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
- H04L12/46—Interconnection of networks
- H04L12/4633—Interconnection of networks using encapsulation techniques, e.g. tunneling
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L41/00—Arrangements for maintenance, administration or management of data switching networks, e.g. of packet switching networks
- H04L41/06—Management of faults, events, alarms or notifications
- H04L41/0654—Management of faults, events, alarms or notifications using network fault recovery
- H04L41/0663—Performing the actions predefined by failover planning, e.g. switching to standby network elements
Abstract
The application provides a message forwarding method, a message forwarding device, electronic equipment and a storage medium, wherein the method is applied to user side equipment and comprises the following steps: after monitoring that a main tunnel between the user side equipment and the opposite end user side equipment is recovered, establishing a tunnel mirror image table item, wherein the tunnel mirror image table item comprises forwarding information of the user side equipment for forwarding a service message by using the main tunnel; changing the tunnel list item bound by the service identification rule of each service loaded by the user side equipment into a tunnel mirror list item, and forwarding the service message of the service according to the tunnel mirror list item, wherein the tunnel list item comprises forwarding information of the user side equipment for forwarding the service message by using a standby tunnel. The embodiment of the application can solve the problem of the packet loss of the service message in the process of switching back to the main tunnel after the main tunnel of the user side equipment is recovered.
Description
Technical Field
The present application relates to the field of communications technologies, and in particular, to a method and an apparatus for forwarding a packet, an electronic device, and a storage medium.
Background
In some service applications, such as Virtual Private Network (VPN) service applications, a user side device usually establishes two tunnels with an opposite end user side device, where one tunnel is a primary tunnel and the other tunnel is a backup tunnel, and the two tunnels are used when the primary tunnel fails, so as to reduce packet loss of a service packet as much as possible.
At present, after a user side device switches to a backup tunnel to send a service message, once it is monitored that a primary tunnel recovers, the content of a tunnel table entry including forwarding information for the user side device to forward the service message using the backup tunnel, which is bound by a service identification rule of each service, is changed into the content of the forwarding information for the user side device to forward the service message using the primary tunnel, so as to implement switching to the primary tunnel to forward the service message, however, changing the table entry content generally takes a while, and a problem of packet loss of the service message still exists.
Disclosure of Invention
In order to overcome the problems in the related art, the application provides a message forwarding method, a message forwarding device, an electronic device and a storage medium.
According to a first aspect of an embodiment of the present application, a method for forwarding a packet is provided, where the method includes:
after monitoring that a main tunnel between the user side equipment and the opposite end user side equipment is recovered, establishing a tunnel mirror image table entry, wherein the tunnel mirror image table entry comprises forwarding information of the user side equipment for forwarding a service message by using the main tunnel;
changing the tunnel table entry bound by the service identification rule of each service carried by the user side equipment into the tunnel mirror image table entry, and forwarding the service message of the service according to the tunnel mirror image table entry, wherein the tunnel table entry comprises forwarding information of the user side equipment for forwarding the service message by using a standby tunnel.
According to a second aspect of the embodiments of the present application, there is provided a packet forwarding apparatus, including:
a creating module, configured to create a tunnel mirror entry after monitoring that a primary tunnel between a user side device and an opposite user side device is recovered, where the tunnel mirror entry includes forwarding information for forwarding a service packet by using the primary tunnel by the user side device;
and the forwarding module is used for changing the tunnel table entry bound by the service identification rule of each service borne by the user side equipment into the tunnel mirror image table entry and forwarding the service message of the service according to the tunnel mirror image table entry, wherein the tunnel table entry comprises forwarding information of the user side equipment for forwarding the service message by using a standby tunnel.
According to a third aspect of embodiments herein, there is provided an electronic device comprising a processor and a machine-readable storage medium storing machine-executable instructions executable by the processor, the processor being caused by the machine-executable instructions to: and implementing the steps of any message forwarding method.
According to a fourth aspect of the embodiments of the present application, a computer-readable storage medium is provided, in which a computer program is stored, and the computer program, when executed by a processor, implements the steps of the above-mentioned message forwarding method.
The technical scheme provided by the embodiment of the application can have the following beneficial effects:
in the embodiment of the application, in the process of switching back to the main tunnel after the main tunnel of the user side device is recovered, the user side device gradually changes tunnel table items (namely, currently used standby tunnel table items) bound by the service identification rule of each service carried by the user side device by creating the tunnel mirror table items capable of using the main tunnel to forward the message, and gradually guides the service message to the main tunnel for forwarding.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the application.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments consistent with the present application and together with the description, serve to explain the principles of the application.
Fig. 1 is a schematic flowchart of a message forwarding method according to an embodiment of the present application;
fig. 2 is a schematic diagram of a networking to which the message forwarding method provided in the embodiment of the present application is applied;
FIG. 3 is a diagram illustrating a modified entry provided in an embodiment of the present application;
fig. 4 is a schematic structural diagram of a message forwarding apparatus according to an embodiment of the present application;
fig. 5 is a schematic structural diagram of an electronic device according to an embodiment of the present application.
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 application. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the present application, as detailed in the appended claims.
The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used in this application 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 is to be understood that although the terms first, second, third, etc. may be used herein to describe various information, such information should not be limited to these terms. These terms are only used to distinguish one type of information from another. For example, first information may also be referred to as second information, and similarly, second information may also be referred to as first information, without departing from the scope of the present application. The word "if" as used herein may be interpreted as "at" \8230; "or" when 8230; \8230; "or" in response to a determination ", depending on the context.
Next, examples of the present application will be described in detail.
An embodiment of the present application provides a message forwarding method, which is applied to a user side device, and as shown in fig. 1, the method may include the following steps:
s11, after monitoring that the main tunnel between the user side equipment and the opposite end user side equipment is recovered, establishing a tunnel mirror image table entry.
The tunnel mirror list item includes the forwarding information of the user side device using the main tunnel to forward the service message, and the tunnel mirror list item corresponds to a new list item index identification.
S12, changing the tunnel table entry bound by the service identification rule of each service carried by the user side equipment into a tunnel mirror image table entry, and forwarding the service message of the service according to the tunnel mirror image table entry.
The tunnel table entry includes forwarding information for the user side device to forward the service packet using the backup tunnel.
It should be noted that, in this embodiment of the present application, for a user side device, when a primary tunnel does not fail, the primary tunnel is used to forward a service packet, and in this case, content of a tunnel entry bound by a service identification rule of each service carried by the user side device is forwarding information of the user side device that forwards the service packet by using the primary tunnel, that is, service identification rules of all services bind to the same tunnel entry. In the actual use process, the tunnel table entry can be presented in a manner of table entry index identification.
After the main tunnel is failed, the user side equipment forwards the service message by using the backup tunnel, and under the condition, the content of the tunnel table entry bound by the service identification rule of each service borne by the user side equipment is changed into forwarding information for the user side equipment to forward the service message by using the backup tunnel.
Here, the service carried by the ue may be a two-layer virtual private network (L2 VPN) service, a three-layer virtual private network (L3 VPN) service, an Incoming Label Management (ILM) service, and the like, and service identification rules of different services are different.
When the user side equipment forwards the service message by using the standby tunnel, if the situation that the main tunnel between the user side equipment and the opposite end user side equipment is recovered is monitored, the tunnel table entry bound by the service identification rule of each service can be changed one by one, the tunnel table entry is changed into a tunnel mirror table entry established after the main tunnel is recovered, and the service message is gradually guided to the main tunnel to be forwarded. For the service which is not changed, the user side equipment can still forward the corresponding service message according to the tunnel table entry before the change.
That is to say, after monitoring that the primary tunnel is recovered, the user side device may forward the relevant service packet by using the primary tunnel and the backup tunnel at the same time before completely switching back to the primary tunnel to forward the service packet, thereby ensuring normal transmission of the service packet and avoiding the problem of packet loss of the service packet.
Further, in an embodiment of the present application, after the tunnel table entry bound by the service identification rule of all services is changed into the tunnel mirror image table entry, the user side device may delete the tunnel table entry bound by all service identification rules, so as to release the storage space resource occupied by the tunnel table entry.
When the subsequent primary tunnel fails again, the user side equipment directly changes the content of the tunnel mirror image table entry, that is, changes the content into the forwarding information of the user side equipment for forwarding the service packet by using the backup tunnel.
In another embodiment of the present application, after the tunnel table entry bound by the service identification rules of all services is changed into the tunnel mirror image table entry, the user side device updates the content of the tunnel table entry before the binding is not changed by the service identification rules of all services into the content of the tunnel mirror image table entry; and changing the tunnel mirror image table entry bound by the service identification rule of each service into an updated tunnel table entry, and forwarding the service message of the service according to the updated tunnel table entry.
After the tunnel mirror table entry bound by the service identification rules of all services is changed into the updated tunnel table entry, the user side equipment can delete the tunnel mirror table entry to release the storage space resources occupied by the tunnel mirror table entry.
Therefore, when the subsequent main tunnel fails again, the user side equipment does not need to modify the table entry index identifier of the tunnel table entry used by the user side equipment, and in the process of changing the table entry content, the table entries corresponding to the two table entry index identifiers can be used simultaneously to forward the service message, so that the problem of packet loss of the service message cannot occur.
The following describes the above message forwarding method in detail with reference to specific embodiments.
Example one
As shown in fig. 2, it is assumed that a primary tunnel and a backup tunnel are established between the user side device 21 and the user side device 22, a specific tunnel protocol may be a Generic Routing Encapsulation (GRE) protocol, and a network device, such as a Port Extension (PE) device, is further disposed between the two, and both the user side devices carry an L2VPN service, an L3VPN service, and an ILM service.
Assuming that the user side device 21 is using the backup tunnel to forward the service packet of the related service, at a certain time, the user side device 21 monitors that the primary tunnel between itself and the user side device 22 is recovered, and creates a tunnel mirror entry, where the tunnel mirror entry includes forwarding information for the user side device 21 to forward the service packet using the primary tunnel, and an entry index corresponding to the tunnel mirror entry is identified as ID2.
Then, ID1 bound to the service identification rule of each service carried by the user side device 21 is changed to ID2, and the service packet of the service is forwarded according to the entry (i.e., tunnel mirror entry) corresponding to ID2, where the entry corresponding to ID1 is actually a tunnel entry including forwarding information for the user side device 21 to forward the service packet using the backup tunnel.
For example, as shown in fig. 3, the user-side device 21 has successfully changed ID1 bound to the service identification rule 1 of the L2VPN service to ID2, and has not yet changed to the service identification rule 2 of the L3VPN service and the service identification rule 3 of the ILM service, in this case, when receiving the service packet of the L2VPN service, the user-side device 21 forwards the service packet of the service according to the entry (i.e., the tunnel mirror entry) corresponding to ID 2; when receiving a service packet of the L3VPN service or the ILM service, the user side device 21 forwards a corresponding service packet according to the entry (i.e., the tunnel entry) corresponding to the ID 1.
After the tunnel entry bound by the service identification rule of all services is changed to the tunnel mirror entry, the user side device 21 means that the tunnel entry has been successfully switched to the primary tunnel, and at this time, the entry corresponding to ID1 is deleted.
Subsequently, if the primary tunnel fails again, the user-side device 21 may directly change the content of the tunnel mirror entry corresponding to the D2.
Example two
The difference from the first embodiment is that after the tunnel entry bound by the service identification rules of all services is changed into the tunnel mirror entry, the user side device 21 does not delete the entry corresponding to ID1, but updates the content of the entry corresponding to ID1 into the content of the entry corresponding to ID 2; and then, respectively changing the D2 bound by the service identification rule of each service into D1, and forwarding the service message of the service according to the table entry (namely, the updated tunnel table entry) corresponding to D1.
The user side device 21 deletes the tunnel mirror image table entry after changing D2 bound by the service identification rules of all services to D1.
Therefore, when the subsequent main tunnel fails again, the user side equipment does not need to modify the entry index identifier of the tunnel entry used by the user side equipment.
According to the technical scheme, in the process of switching back to the main tunnel after the main tunnel of the user side equipment is recovered, the user side equipment gradually guides the service message to the main tunnel to be forwarded by creating the tunnel mirror image table entry capable of forwarding the message by using the main tunnel, changing the tunnel table entry bound by the service identification rule of each service carried by the user side equipment one by one (namely, the currently used standby tunnel table entry), and simultaneously using the tunnel mirror image table entry and the tunnel table entry in the whole guiding process, so that the normal transmission of the service message is ensured, and the problem of packet loss of the service message is further avoided.
Based on the same inventive concept, the present application further provides a packet forwarding apparatus, which is applied to a user side device, and a schematic structural diagram of the apparatus is shown in fig. 4, and specifically includes:
a creating module 41, configured to create a tunnel mirror entry after monitoring that a primary tunnel between the user side device and an opposite user side device is recovered, where the tunnel mirror entry includes forwarding information for the user side device to forward a service packet using the primary tunnel;
a forwarding module 42, configured to change a tunnel entry bound to a service identification rule of each service borne by the user side device into the tunnel mirror entry, and forward a service packet of the service according to the tunnel mirror entry, where the tunnel entry includes forwarding information for the user side device to forward the service packet using a backup tunnel.
Preferably, the apparatus further comprises:
a first deleting module (not shown in fig. 4) configured to delete the tunnel table entries bound by all the service identification rules after the tunnel table entries bound by the service identification rules of all the services are changed to the tunnel mirror table entries.
Preferably, the forwarding module 42 is further configured to:
after changing the tunnel table entry bound by the service identification rules of all the services into the tunnel mirror image table entry, updating the content of the tunnel table entry before the binding without changing the service identification rules of all the services into the content of the tunnel mirror image table entry;
and changing the tunnel mirror image table entry bound by the service identification rule of each service into an updated tunnel table entry, and forwarding the service message of the service according to the updated tunnel table entry.
Preferably, the apparatus further comprises:
a second deleting module (not shown in fig. 4), configured to delete the tunnel mirror entry after the tunnel mirror entry bound by the service identification rules of all services is changed into the updated tunnel entry.
According to the technical scheme, in the process of switching back to the main tunnel after the main tunnel of the user side equipment is recovered, the user side equipment gradually guides the service message to the main tunnel to be forwarded by creating the tunnel mirror image table entry capable of forwarding the message by using the main tunnel, changing the tunnel table entry bound by the service identification rule of each service carried by the user side equipment one by one (namely, the currently used standby tunnel table entry), and simultaneously using the tunnel mirror image table entry and the tunnel table entry in the whole guiding process, so that the normal transmission of the service message is ensured, and the problem of packet loss of the service message is further avoided.
An electronic device is further provided in the embodiments of the present application, as shown in fig. 5, including a processor 51 and a machine-readable storage medium 52, where the machine-readable storage medium 52 stores machine-executable instructions that can be executed by the processor 51, and the processor 51 is caused by the machine-executable instructions to: and implementing the message forwarding method.
The machine-readable storage medium may include a Random Access Memory (RAM) or a Non-Volatile Memory (NVM), such as at least one disk Memory. Alternatively, the machine-readable storage medium may be at least one memory device located remotely from the processor.
The Processor may be a general-purpose Processor, including a Central Processing Unit (CPU), a Network Processor (NP), and the like; but also Digital Signal Processors (DSPs), application Specific Integrated Circuits (ASICs), field Programmable Gate Arrays (FPGAs) or other Programmable logic devices, discrete Gate or transistor logic devices, discrete hardware components.
In another embodiment provided by the present application, a computer-readable storage medium is further provided, in which a computer program is stored, and the computer program, when executed by a processor, implements the steps of the message forwarding method.
The above description is only exemplary of the present application and should not be taken as limiting the present application, as any modification, equivalent replacement, or improvement made within the spirit and principle of the present application should be included in the scope of protection of the present application.
Claims (10)
1. A message forwarding method is applied to user side equipment, and is characterized in that the method comprises the following steps:
after monitoring that a main tunnel between the user side equipment and the opposite end user side equipment is recovered, establishing a tunnel mirror image table item, wherein the tunnel mirror image table item comprises forwarding information of the user side equipment for forwarding a service message by using the main tunnel;
changing the tunnel table entry bound by the service identification rule of each service carried by the user side equipment into the tunnel mirror image table entry, and forwarding the service message of the service according to the tunnel mirror image table entry, wherein the tunnel table entry comprises forwarding information of the user side equipment for forwarding the service message by using a standby tunnel.
2. The method of claim 1, further comprising:
and after the tunnel table entries bound by the service identification rules of all the services are changed into the tunnel mirror image table entries, deleting the tunnel table entries bound by all the service identification rules.
3. The method of claim 1, further comprising:
after changing the tunnel table entry bound by the service identification rules of all the services into the tunnel mirror image table entry, updating the content of the tunnel table entry before the binding without changing the service identification rules of all the services into the content of the tunnel mirror image table entry;
and changing the tunnel mirror image table entry bound by the service identification rule of each service into an updated tunnel table entry, and forwarding the service message of the service according to the updated tunnel table entry.
4. The method of claim 3, further comprising:
and after the tunnel mirror image table entry bound by the service identification rules of all the services is changed into the updated tunnel table entry, deleting the tunnel mirror image table entry.
5. A message forwarding apparatus, wherein the apparatus is applied to a user side device, and the apparatus comprises:
a creating module, configured to create a tunnel mirror entry after monitoring that a primary tunnel between a user side device and an opposite user side device is recovered, where the tunnel mirror entry includes forwarding information for forwarding a service packet by using the primary tunnel by the user side device;
a forwarding module, configured to change a tunnel entry bound to a service identification rule of each service borne by the user side device into the tunnel mirror entry, and forward a service packet of the service according to the tunnel mirror entry, where the tunnel entry includes forwarding information for the user side device to forward the service packet using a backup tunnel.
6. The apparatus of claim 5, further comprising:
and the first deleting module is used for deleting the tunnel table entries bound by all the service identification rules after the tunnel table entries bound by the service identification rules of all the services are changed into the tunnel mirror image table entries.
7. The apparatus of claim 5, wherein the forwarding module is further configured to:
after changing the tunnel table entry bound by the service identification rules of all the services into the tunnel mirror table entry, updating the content of the tunnel table entry before the binding is not changed by the service identification rules of all the services into the content of the tunnel mirror table entry;
and changing the tunnel mirror image table entry bound by the service identification rule of each service into an updated tunnel table entry, and forwarding the service message of the service according to the updated tunnel table entry.
8. The apparatus of claim 7, further comprising:
and the second deleting module is used for deleting the tunnel mirror image table entry after the tunnel mirror image table entry bound by the service identification rules of all the services is changed into the updated tunnel table entry.
9. An electronic device comprising a processor and a machine-readable storage medium storing machine-executable instructions executable by the processor, the processor being caused by the machine-executable instructions to: carrying out the method steps of any one of claims 1 to 4.
10. A computer-readable storage medium, characterized in that a computer program is stored in the computer-readable storage medium, which computer program, when being executed by a processor, carries out the method steps of any one of claims 1 to 4.
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