CN112866367A - Routing system based on programmable switch - Google Patents
Routing system based on programmable switch Download PDFInfo
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- CN112866367A CN112866367A CN202110036893.5A CN202110036893A CN112866367A CN 112866367 A CN112866367 A CN 112866367A CN 202110036893 A CN202110036893 A CN 202110036893A CN 112866367 A CN112866367 A CN 112866367A
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- 230000015654 memory Effects 0.000 description 8
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L67/00—Network arrangements or protocols for supporting network services or applications
- H04L67/50—Network services
- H04L67/60—Scheduling or organising the servicing of application requests, e.g. requests for application data transmissions using the analysis and optimisation of the required network resources
- H04L67/63—Routing a service request depending on the request content or context
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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
- H04L41/0668—Management of faults, events, alarms or notifications using network fault recovery by dynamic selection of recovery network elements, e.g. replacement by the most appropriate element after failure
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L49/00—Packet switching elements
- H04L49/10—Packet switching elements characterised by the switching fabric construction
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L63/00—Network architectures or network communication protocols for network security
- H04L63/10—Network architectures or network communication protocols for network security for controlling access to devices or network resources
Abstract
The invention relates to the technical field of communication, in particular to a routing system based on a programmable switch. The system includes a plurality of programmable switches; each programmable switch includes one or more switch channels; a plurality of switch channels respectively positioned on different programmable switches form a channel cluster; based on the state of the channel cluster, a plurality of switch channels in the channel cluster are switched according to a preset priority to transmit flow. Under the SDN network scene, the programmable switch is used for realizing more accurate user flow statistics, speed limit management and other management, and in a channel cluster, a plurality of switch channels are mutually main and standby, so that the system reliability is improved, and the waste of equipment resources is reduced.
Description
Technical Field
The invention relates to the technical field of communication, in particular to a routing system based on a programmable switch.
Background
When a service provider needs to manage its user network traffic, the following two schemes can be generally adopted:
in the scheme 1, because the flows of different users are not easy to be summarized on the side of the access switch, the user flows are distinguished through the access switch, the flows of different users are sent to different flow management gateways, the flow of the same user is sent to the same gateway, and the user flow is managed on the gateway;
in the scheme 2, the user traffic flows on different gateways, and at this time, if the user traffic is managed, the traffic of the current user on each gateway needs to be summarized, and then the total traffic, the purchase traffic and the like are calculated after the summary, and the speed limit and the like are processed in proportion. For example, a user purchases 10M bandwidth, a speed limit is set for each gateway at first, if the total bandwidth of the user runs to 20M (10M is actually used by the gateway 1, 5M is actually used by the gateway 2, and 5M is actually used by the gateway 3), at this time, speed limit processing is required, and at this time, speed limit needs to be performed on each gateway according to a ratio (the speed limit of the gateway 1 is 5M, the speed limit of the gateway 2 is 2.5M, and the speed limit of the gateway 3 is 2.5M).
However, the above two schemes have the following drawbacks:
scheme 1:
1) two layers of architectures are needed for processing, and the management is relatively complex;
2) the gateway for managing the flow has the hidden trouble of single point fault, and if the gateway for managing the flow adopts the main standby mode, the backup machine has the problem of resource waste.
Scheme 2:
the flow statistics is inaccurate, an additional system is needed to summarize the flow on the gateway, if the total flow exceeds the purchase bandwidth, the rate is limited proportionally according to a certain algorithm, and meanwhile, the flow statistics has a delay problem.
Disclosure of Invention
The invention aims to provide a routing system based on a programmable switch, which realizes more accurate user flow statistics, speed limit management and the like by using the programmable switch in an SDN network scene and simultaneously reduces equipment resource waste.
The embodiment of the invention discloses a routing system based on programmable switches, which comprises a plurality of programmable switches, a plurality of routing modules and a plurality of routing modules, wherein the programmable switches are connected with the routing modules through the routing modules;
each programmable switch includes one or more switch channels;
a plurality of switch channels respectively positioned on different programmable switches form a channel cluster;
based on the state of the channel cluster, a plurality of switch channels in the channel cluster are switched according to a preset priority to transmit flow.
Optionally, when a plurality of switch channels are included in the programmable switch, the switch channels are isolated from each other by virtual routing forwarding.
Optionally, the programmable switch is a P4 switch.
Optionally, the switch channels are connected with the server side network and with the user side network in a border gateway protocol.
Optionally, the predetermined priority is announced by a border gateway protocol.
Optionally, the switch channel has a traffic management function, and the traffic management function includes traffic statistics, traffic speed limit, and traffic quota.
Optionally, each channel cluster includes a virtual IP, and in the channel cluster, the virtual IP is allocated in a normal switch channel according to a predetermined priority.
Optionally, based on the state of the channel cluster, switching the multiple switch channels in the channel cluster according to a predetermined priority to transmit the traffic includes:
in the channel cluster, the flow is transmitted through the switch channel where the virtual IP is located, and when the switch channel where the virtual IP is located is abnormal, the virtual IP drifts to the normal switch channel in the channel cluster according to the preset priority.
Compared with the prior art, the implementation mode of the invention has the main differences and the effects that:
in the present invention, a plurality of switch channels respectively located in different programmable switches form a channel cluster, and the distinguishing features have the following effects: when the programmable switch where the switch channel in use is located in the channel cluster cannot be used normally, the switch channels located in other programmable switches can be enabled to accept the flow of the user, so that the main and standby functions are achieved.
In the present invention, each programmable switch includes one or more switch channels, and the distinguishing features have the effects of: a programmable switch can respectively provide switch channels for one or more channel clusters, when one switch channel is in a backup state, too much resources of the switch where the switch channel is located cannot be occupied, that is, the switch channel which is backed up in one channel cluster cannot completely occupy the switch where the switch channel is located, so that the switch is in an idle state to cause resource waste, and on the contrary, the resources of the switch can still be used by other channel clusters, thereby reducing the equipment resource waste.
In the invention, based on the state of the channel cluster, a plurality of switch channels in the channel cluster are switched according to a preset priority to transmit flow, and the distinguishing characteristic has the following effects: the management of user flow is realized on the switch channels in the programmable switch, and the switch channels are mutually active and standby automatically according to the preset priority, so that the reliability of the system is improved.
In the invention, when the programmable switch comprises a plurality of switch channels, the switch channels are transmitted and isolated through the virtual route, and the distinguishing characteristic has the following effects: because a plurality of switch channels in the same programmable switch belong to different channel clusters respectively and are provided for different users to use, the logic isolation between the switch channels is realized by setting different virtual routing forwarding in different switch channels.
In the present invention, the programmable switch is a P4 switch, and the distinguishing features have the following effects: the P4 switch has many Pipe functions, can conveniently realize many switch passageways, and the P4 switch has the speed limit function, conveniently manages user flow.
In the invention, the switch channel is connected with the server side network and the user side network by the border gateway protocol, the preset priority is announced by the border gateway protocol, and the distinguishing characteristic has the following effects: the border gateway protocol can declare the priority of the virtual IP, and the multiple switch channels can be mutually used as main switches and standby switches according to the preset priority.
In the invention, the switch channel has a flow management function, the flow management function comprises flow statistics, flow speed limit and flow quota, and the distinguishing characteristic has the following effects: user traffic can be managed in a variety of ways.
In the invention, each channel cluster comprises a virtual IP, and in the channel cluster, the virtual IP is distributed in a normal switch channel according to a preset priority, and the distinguishing characteristic has the following effects: different virtual IPs are arranged in different channel clusters, so that the flow isolation of different channel clusters is realized.
In the present invention, based on the state of the channel cluster, the switching of the plurality of switch channels in the channel cluster according to the predetermined priority to transmit the traffic includes: in the channel cluster, the flow is transmitted through the switch channel where the virtual IP is located, when the switch channel where the virtual IP is located is abnormal, the virtual IP drifts to the normal switch channel in the channel cluster according to the preset priority, and the distinguishing characteristic has the following effects: through the automatic drift of the virtual IP, the switch channels are mutually active and standby automatically according to the preset priority, and the reliability of the system is improved.
Drawings
Fig. 1 shows a schematic diagram of a programmable switch-based routing system according to an embodiment of the invention.
Detailed Description
The present application is further described with reference to the following detailed description and the accompanying drawings. It is to be understood that the specific embodiments described herein are merely illustrative of the application and are not limiting of the application. In addition, for convenience of description, only a part of structures or processes related to the present application, not all of them, is illustrated in the drawings. It should be noted that in this specification, like reference numerals and letters refer to like items in the following drawings.
It will be understood that, although the terms "first", "second", etc. may be used herein to describe various features, these features should not be limited by these terms. These terms are used merely for distinguishing and are not intended to indicate or imply relative importance. For example, a first feature may be termed a second feature, and, similarly, a second feature may be termed a first feature, without departing from the scope of example embodiments.
In the description of the present application, it is also to be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present embodiment can be understood in specific cases by those of ordinary skill in the art.
The illustrative embodiments of the present application include, but are not limited to, programmable switch-based routing systems.
Various aspects of the illustrative embodiments will be described using terms commonly employed by those skilled in the art to convey the substance of their work to others skilled in the art. It will be apparent, however, to one skilled in the art that some alternative embodiments may be practiced using the features described in part. For purposes of explanation, specific numbers and configurations are set forth in order to provide a more thorough understanding of the illustrative embodiments. It will be apparent, however, to one skilled in the art that alternative embodiments may be practiced without the specific details. In some other instances, well-known features are omitted or simplified in order not to obscure the illustrative embodiments of the present application.
Moreover, various operations will be described as multiple operations separate from one another in a manner that is most helpful in understanding the illustrative embodiments; however, the order of description should not be construed as to imply that these operations are necessarily order dependent, and that many of the operations can be performed in parallel, concurrently, or simultaneously. In addition, the order of the operations may be re-arranged. The process may be terminated when the described operations are completed, but may have additional steps not included in the figure. The processes may correspond to methods, functions, procedures, subroutines, and the like.
References in the specification to "one embodiment," "an illustrative embodiment," etc., indicate that the embodiment described may include a particular feature, structure, or characteristic, but every embodiment may or may not necessarily include the particular feature, structure, or characteristic. Moreover, such phrases are not necessarily referring to the same embodiment. Furthermore, when a particular feature is described in connection with a particular embodiment, the knowledge of one skilled in the art can affect such feature in combination with other embodiments, whether or not such embodiments are explicitly described.
The terms "comprising," "having," and "including" are synonymous, unless the context dictates otherwise. The phrase "A and/or B" means "(A), (B) or (A and B)".
As used herein, the term "module" may refer to, be a part of, or include: memory (shared, dedicated, or group) for executing one or more software or firmware programs, an Application Specific Integrated Circuit (ASIC), an electronic circuit and/or processor (shared, dedicated, or group), a combinational logic circuit, and/or other suitable components that provide the described functionality.
In the drawings, some features of the structures or methods may be shown in a particular arrangement and/or order. However, it should be understood that such specific arrangement and/or ordering is not required. Rather, in some embodiments, these features may be described in a manner and/or order different from that shown in the illustrative figures. Additionally, the inclusion of structural or methodical features in a particular figure does not imply that all embodiments need to include such features, and in some embodiments, may not include such features or may be combined with other features.
To make the objects, technical solutions and advantages of the present application more clear, embodiments of the present application will be described in further detail below with reference to the accompanying drawings.
Fig. 1 shows a schematic diagram of a programmable switch-based routing system according to an embodiment of the invention.
As shown in FIG. 1, the system 100 includes a plurality of programmable switches 102 and 106;
programmable switch 102 includes switch channels 108 and 112, programmable switch 104 includes switch channels 114 and 116, and programmable switch 106 includes switch channel 118;
a plurality of switch channels 108, 114 and 118, located at programmable switches 102, 104 and 106, respectively, form a channel cluster 120, and a plurality of switch channels 110 and 116, located at programmable switches 102 and 104, respectively, form a channel cluster 122;
based on the state of the channel cluster, a plurality of switch channels in the channel cluster are switched according to a preset priority to transmit flow.
Referring to fig. 1, for example, when a service provider provides a network service to a user and needs to manage network traffic of the user, the system 100 according to an embodiment of the present invention performs traffic management, for example, the programmable switch 102 and 106 are connected to the server side and the user 124, and the switch channels 110 and 116 of the channel cluster 122 are connected to the user 126. Traffic flows to and/or from the subscribers 124 via one of the switch channels in the channel cluster 120 at a predetermined priority (e.g., in the order of the switch channels 108, 114, 118), e.g., traffic is preferentially exchanged between the server side and the subscribers 124 via the switch channel 108 in the programmable switch 102. if the programmable switch 102 is down at that time, traffic is immediately exchanged for the switch channel 114 in the programmable switch 104 at the predetermined priority, and if the programmable switch 104 is also down, the switch channel 118 in the programmable switch 106 is exchanged. Traffic flows to and/or from subscribers 126 via one of the switch channels in the channel cluster 122 at a predetermined priority (e.g., in the order of switch channels 116, 110), e.g., traffic is preferentially exchanged between the server side and subscribers 126 via switch channel 116 in programmable switch 104, and if the programmable switch 104 is down at that time, traffic is immediately exchanged for switch channel 110 in programmable switch 102 at the predetermined priority.
It is to be understood that the above-described system is only an example, and the number of components and the order of implementation thereof should not be construed as limiting the present invention.
In the invention, when the programmable switch in which the switch channel in use is located in the channel cluster can not be used normally, the switch channels of other programmable switches can be started to bear the flow of a user, thereby playing a role of active/standby; a programmable switch can respectively provide switch channels for one or more channel clusters, and when one switch channel is in a backup state, the switch channel cannot occupy too many resources of the switch where the switch is located, that is, the switch channel backed up in one channel cluster cannot completely occupy the switch where the switch is located so that the switch is in an idle state to cause resource waste, and on the contrary, the resources of the switch can still be used by other channel clusters, thereby reducing the equipment resource waste; the management of user flow is realized on the switch channels in the programmable switch, and the switch channels are mutually active and standby automatically according to the preset priority, so that the reliability of the system is improved.
According to some embodiments of the present application, when a plurality of switch lanes are included in a programmable switch, the plurality of switch lanes are isolated from each other by virtual routing forwarding.
In connection with fig. 1, for example, switch paths 108, 110, 112 in programmable switch 102 are isolated from each other by virtual routing forwarding isolation, and messages received by them (e.g., from upstream switches) are isolated from each other.
In the invention, because a plurality of switch channels in the same programmable switch belong to different channel clusters respectively and are provided for different users to use, the logic isolation among the switch channels is realized by setting different virtual routing forwarding in different switch channels.
According to some embodiments of the present application, the programmable switch is a P4 switch.
In the invention, the P4 switch has a multi-Pipe function, so that multi-switch channels can be conveniently realized, and the P4 switch has a speed limiting function, so that the user traffic can be conveniently managed.
According to some embodiments of the present application, switch channels are connected with a server-side network and with a user-side network in a border gateway protocol.
According to some embodiments of the application, the predetermined priority is announced by a border gateway protocol.
In the invention, the boundary gateway protocol can declare the priority of the virtual IP, thereby conveniently realizing that a plurality of switch channels mutually master and standby according to the preset priority.
According to some embodiments of the present application, the switch channel has traffic management functions including traffic statistics, traffic speed limit, and traffic quota.
In the invention, the user traffic can be managed in multiple aspects.
According to some embodiments of the present application, each channel cluster includes a virtual IP, and in the channel cluster, the virtual IP is allocated in a normal switch channel according to a predetermined priority.
According to some embodiments of the present application, switching a plurality of switch channels in a channel cluster according to a predetermined priority to transmit traffic based on a state of the channel cluster includes:
in the channel cluster, the flow is transmitted through the switch channel where the virtual IP is located, and when the switch channel where the virtual IP is located is abnormal, the virtual IP drifts to the normal switch channel in the channel cluster according to the preset priority.
Referring to fig. 1, for example, when a service provider provides a network service to a user and needs to manage network traffic of the user, the system 100 according to an embodiment of the present invention performs traffic management, for example, the programmable switch 102 and 106 are connected to the server side and the user 124, and the switch channels 110 and 116 of the channel cluster 122 are connected to the user 126. The virtual IP of the channel cluster 120 is located on a switch channel in the channel cluster 120 according to a predetermined priority (e.g., advertised by the border gateway protocol in the precedence order of the switch channels 108, 114, 118), traffic flows to and/or from the user 124 via the switch channel on which the virtual IP is located, for example, the virtual IP of the channel cluster 120 is preferentially located in the switch channel 108 in the programmable switch 102, traffic is switched between the server side and the user 124 via the switch channel 108, if the programmable switch 102 is down at this point, the virtual IP is immediately drifted to the switch channels 114 in the programmable switch 104, according to a predetermined priority, whereupon traffic is switched via the switch channels 114, if the programmable switch 104 is also down, the virtual IP immediately drifts to the switch channel 118 in the programmable switch 106 and traffic is switched via the switch channel 118. The virtual IP of the channel cluster 122 is located on one switch channel in the channel cluster 122 according to a predetermined priority (e.g., advertised by the border gateway protocol in the precedence order of the switch channels 116, 110), and traffic flows to and/or from the subscribers 126 via the switch channel on which the virtual IP is located, e.g., the virtual IP of the channel cluster 122 is preferentially located on the switch channel 116 in the programmable switch 104, and traffic is switched between the server side and the subscribers 126 via the switch channel 116, and if the programmable switch 104 is down at this time, the virtual IP immediately drifts to the switch channel 110 in the programmable switch 102 according to the predetermined priority, and then traffic is switched via the switch channel 110.
In the invention, different virtual IPs are arranged in different channel clusters, so that the flow isolation of different channel clusters is realized; through the automatic drift of the virtual IP, the switch channels are mutually active and standby automatically according to the preset priority, and the reliability of the system is improved.
In some cases, the disclosed embodiments may be implemented in hardware, firmware, software, or any combination thereof. The disclosed embodiments may also be implemented in the form of instructions or programs carried on or stored on one or more transitory or non-transitory machine-readable (e.g., computer-readable) storage media, which may be read and executed by one or more processors or the like. When the instructions or program are executed by a machine, the machine may perform the various methods described previously. For example, the instructions may be distributed via a network or other computer readable medium. Thus, a machine-readable medium may include, but is not limited to, any mechanism for storing or transmitting information in a form readable by a machine (e.g., a computer), such as floppy diskettes, optical disks, compact disc read-only memories (CD-ROMs), magneto-optical disks, read-only memories (ROMs), Random Access Memories (RAMs), erasable programmable read-only memories (EPROMs), electrically erasable programmable read-only memories (EEPROMs), magnetic or optical cards, or flash memory or tangible machine-readable memory for transmitting network information via electrical, optical, acoustical or other forms of signals (e.g., carrier waves, infrared signals, digital signals, etc.). Thus, a machine-readable medium includes any form of machine-readable medium suitable for storing or transmitting electronic instructions or machine (e.g., a computer) readable information.
While the embodiments of the present application have been described in detail with reference to the accompanying drawings, the application of the present application is not limited to the various applications mentioned in the embodiments of the present application, and various structures and modifications can be easily implemented with reference to the present application to achieve various advantageous effects mentioned herein. Variations that do not depart from the gist of the disclosure are intended to be within the scope of the disclosure.
Claims (8)
1. A programmable switch based routing system comprising a plurality of programmable switches;
each of the programmable switches comprises one or more switch channels;
a plurality of switch channels respectively positioned at different programmable switches form a channel cluster;
and based on the state of the channel cluster, switching the switch channels in the channel cluster according to a preset priority to transmit the flow.
2. The system of claim 1, wherein when a plurality of said switch lanes are included in said programmable switch, said plurality of switch lanes are isolated from each other by virtual routing forwarding.
3. The system of claim 1, wherein the programmable switch is a P4 switch.
4. The system of claim 1, wherein the switch channels are connected with a server-side network and with a user-side network in a border gateway protocol.
5. The system of claim 4, wherein the predetermined priority is advertised by the border gateway protocol.
6. The system of claim 1, wherein the switch channel has traffic management functions, and the traffic management functions include traffic statistics, traffic speed limits, and traffic quota.
7. The system according to any one of claims 1 to 6, wherein each of said channel clusters comprises a virtual IP, and in said channel cluster, said virtual IP is allocated in a normal said switch channel according to said predetermined priority.
8. The system of claim 7, wherein the switching the switch channels in the channel cluster to transmit traffic according to a predetermined priority based on the status of the channel cluster comprises:
in the channel cluster, the traffic is transmitted through the switch channel where the virtual IP is located, and when the switch channel where the virtual IP is located is abnormal, the virtual IP drifts to the normal switch channel in the channel cluster according to the predetermined priority.
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| CN114827011A (en) * | 2022-01-19 | 2022-07-29 | 融智通科技（北京）股份有限公司 | Programmable routing switch, system and method |
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