CN106790656A - A kind of load balancing apparatus and its method based on SDN - Google Patents
A kind of load balancing apparatus and its method based on SDN Download PDFInfo
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- CN106790656A CN106790656A CN201710038089.4A CN201710038089A CN106790656A CN 106790656 A CN106790656 A CN 106790656A CN 201710038089 A CN201710038089 A CN 201710038089A CN 106790656 A CN106790656 A CN 106790656A
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- load balancing
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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
- H04L67/01—Protocols
- H04L67/10—Protocols in which an application is distributed across nodes in the network
- H04L67/1001—Protocols in which an application is distributed across nodes in the network for accessing one among a plurality of replicated servers
- H04L67/1038—Load balancing arrangements to avoid a single path through a load balancer
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Abstract
The invention discloses a kind of load balancing apparatus based on SDN and its method, comprising a load balancing controller and multiple load-equalizing switch, multiple load-equalizing switch are connected with load balancing controller by its base plane and set up openflow passages, load balancing controller is used to shunt decision-making and load monitoring, and the instruction that load balancing controller of the load-equalizing switch according to is issued is parsed to data traffic and forwarded or abandoned.The present invention shunts load-balancing device control plane and Forwarding plane, reduces the complexity of SiteServer LBS, improves system maintainability, realizes many device intercommunicating cascades, reduces Development and Production cost.
Description
Technical field
The present invention relates to a kind of load balancing apparatus and its method, particularly a kind of load balancing apparatus based on SDN and
Its method.
Background technology
The load-balancing device of current existing network operation, due to the particularity of application scenarios, is private network special equipment, soft or hard
Part needs individually designed, research and development, and cost is more high；Increase to meet the explosive of existing network flow simultaneously, software and hardware is also needed
Continual upgrading is wanted, equipment manufacturer needs long-term input manpower and materials to carry out the stable operation of proof load balancing equipment and hold
Continuous optimization and upgrading.
Due to the load balancing implementation difference of different manufacturers, each equipment manufacturer has a set of maintenance management of oneself
System and load-balancing algorithm, reduce network efficiency, bring various maintenance inconvenience, increase maintenance management cost, and
Therefore cannot also be realized across many equipment cascadings of producer.
The content of the invention
The technical problems to be solved by the invention are to provide a kind of load balancing apparatus based on SDN and its method, realize
Many device intercommunicating cascades.
In order to solve the above technical problems, the technical solution adopted in the present invention is：
A kind of load balancing apparatus based on SDN, it is characterised in that：Comprising a load balancing controller and multiple load balancing
Interchanger, multiple load-equalizing switch are connected with load balancing controller by its base plane and set up openflow passages,
Load balancing controller is used to shunt decision-making and load monitoring, under load balancing controller of the load-equalizing switch according to
The instruction of hair is parsed to data traffic and is forwarded or abandoned.
Further, three-level flow table is provided with the load-equalizing switch, flow table is used separately in service traffics identification, stream
Table one is used for the balanced forwarding of this equipment flow, and the flow that flow table two is used for InterWorking Equipment is forwarded.
Further, the flow table one is load balancing forward table, start bit of the flow table item with data flow ID in messages
Put and length, data flow ID be match matching fields, Action fields are modification purpose Mac addresses, modification purpose Ip,
Output output ports.
Further, the flow table two for interconnection forward table, flow table item with purpose ip be match matching fields, action
Field is acted for output, and output port is the port for connecting certain cascade load-equalizing switch.
A kind of a kind of load balancing side based on SDN of the load balancing apparatus based on SDN described in usage right requirement 1
Method, it is characterised in that comprise the steps of：
Step one：Backend nodes ip is configured at the end of load balancing controller 1, load balancing controller 1 is first by all negative
Carry the packet out message modes that balanced interchanger issues the arp messages of encapsulation query node mac addresses, end segment after acquisition
Point mac addresses and port mapping relationship；Then load balancing controller is regularly by carrying icmp or snmp messages
Packet out message obtains the load weight of backend nodes, and in load balancing controller by the generation point of specific sort algorithm
The balanced group table of stream；
Step 2：Load-equalizing switch supports three-level flow table, by load balancing controller to load-equalizing switch flow table
Flow table item of the addition based on purpose ip forwardings in zero, destination address is that the bag that enters of the virtual ip of the machine jumps to flow table one, destination
Location is not that the bag that enters of the virtual ip of the machine jumps to flow table two, and packet in are packaged into if other messages such as messages such as arp, icmp
Information reporting load balancing controller, it is remaining, abandon；
Step 3：Message into flow table one matches flow table item, is forwarded by corresponding action instructions if hit, no
Message is then encapsulated into packet in information reporting load balancing controllers by hit, and load balancing controller is from loading sharing group
A low node of load is selected to be exported as message in table, construction FlowMod message issues flow table rule to flow table one；
Step 4：Message into flow table two matches flow table item first, hit, then forwarded by flow table action, does not order
In, then message is packaged into packet in information reporting load balancing controllers, controller according to the purpose IP address of message,
In conjunction with the whole network link topology of controller, the forward-path of the message is calculated, it is equal to the load on forward-path successively
Weighing apparatus issues the flow table item of flow table two.
Further, load balancing controller and load-equalizing switch only support that L4 is matched in openflow 1.3.4
On the basis of add to payload part matching support, comprising specified matching payload offset and data length.
Further, the load-equalizing switch is identified to inbound port packet, the message of matching flow table rule,
Then operated by the action fields of flow table item, the message being not hit by, then the action for being configured by table miss is operated.
The present invention compared with prior art, with advantages below and effect：The present invention will be loaded equal based on SDN design philosophys
Weighing apparatus equipment control plane and Forwarding plane are shunted, and reduce the complexity of SiteServer LBS, improve system maintainability, real
Now many device intercommunicating cascades, reduce Development and Production cost；The present invention will be changed in former framework by hard-wired business function
For pure software is realized, the hardware and software development cost of former load-balancing device can be effectively reduced；SDN characteristics determine that load is equal simultaneously
Weighing apparatus controller possesses the overall topological ability of network, and what load balancing controller can be in United Dispatching, management whole network is all
Equipment, flow distribution form；Load-equalizing switch reduces software and hardware complicated due to only making data identification and forwarding purposes
Degree, decreases and correspondingly develops maintenance cost.
Brief description of the drawings
Fig. 1 is a kind of schematic diagram of load balancing apparatus based on SDN of the invention.
Specific embodiment
The present invention is described in further detail below in conjunction with the accompanying drawings and by embodiment, and following examples are to this hair
Bright explanation and the invention is not limited in following examples.
As shown in figure 1, a kind of load balancing apparatus based on SDN of the invention, comprising a He of load balancing controller 1
Multiple load-equalizing switch 2, multiple load-equalizing switch 2 are connected with load balancing controller 1 by its base plane and built
Vertical openflow passages 3, load balancing controller 1 is used to shunt decision-making and load monitoring, and load-equalizing switch 2 is according to load
The instruction that balance controller 1 is issued is parsed to data traffic and is forwarded or abandoned.
Three-level flow table is provided with load-equalizing switch 2, flow table 04 recognizes that flow table 1 is used for this for service traffics
The balanced forwarding of equipment flow, the flow that flow table 26 is used for InterWorking Equipment is forwarded.Flow table 1 is load balancing forward table, flow table
Be match matching fields with data flow ID original positions in messages and length, data flow ID, Action fields are to change
Purpose Mac addresses, modification purpose Ip, output output port 7.Flow table 26 is interconnection forward table, and flow table item is with purpose ip
Match matching fields, action fields are acted for output, and output port is the end for connecting certain cascade load-equalizing switch
Mouth 8.
A kind of load-balancing method based on SDN, comprises the steps of：
Step one：Backend nodes ip is configured at the end of load balancing controller 1, load balancing controller 1 is first by all negative
Carry the packet out message modes that balanced interchanger issues the arp messages of encapsulation query node mac addresses, end segment after acquisition
Point mac addresses and port mapping relationship；Then load balancing controller is regularly by carrying icmp or snmp messages
Packet out message obtains the load weight of backend nodes, and in load balancing controller by the generation point of specific sort algorithm
The balanced group table of stream；
Step 2：Load-equalizing switch supports three-level flow table, by load balancing controller to load-equalizing switch flow table
Flow table item of the addition based on purpose ip forwardings in zero, destination address is that the bag that enters of the virtual ip of the machine jumps to flow table one, destination
Location is not that the bag that enters of the virtual ip of the machine jumps to flow table two, and packet in are packaged into if other messages such as messages such as arp, icmp
Information reporting load balancing controller, it is remaining, abandon；
Step 3：Flow table 1 is load balancing forward table, flow table item with data flow ID original positions in messages and length,
Data flow ID is match matching fields, and Action fields are modification purpose Mac addresses, modification purpose Ip, output output end
Mouthful.Message into flow table one matches flow table item, is forwarded by corresponding action instructions if hit, then will be not hit by
Message is encapsulated into packet in information reporting load balancing controllers, and load balancing controller is selected from loading sharing group table
One low node of load is exported as message, and construction FlowMod message issues flow table rule to flow table one；
Step 4：Flow table 26 is interconnection forward table, and flow table item is match matching fields with purpose ip, and action fields are
Output is acted, and output port is the port for connecting certain cascade load-equalizing switch.Into flow table two message first
With flow table item, hit is then forwarded by flow table action, is not hit by, then message is packaged into packet in information reportings
Load balancing controller, controller, in conjunction with the whole network link topology of controller, is calculated according to the purpose IP address of message
The forward-path of the message, issues the flow table item of flow table two to the load balancing on forward-path successively.
Load balancing controller and load-equalizing switch on the basis of openflow 1.3.4 agreements are fully complied with, root
According to the business characteristic of load balancing, targetedly it is customized, the basis of L4 matchings is only supported in openflow 1.3.4
On with the addition of to payload part matching support, comprising specified matching payload offset and data length.
Load balancing controller by the most of business function in comprising existing specification, by former framework by hard-wired
Business function is changed into pure software realization, can effectively reduce the hardware and software development cost of former load-balancing device.While SDN characteristics
Determine that load balancing controller possesses the overall topological ability of network, load balancing controller can United Dispatching, management it is whole
All devices, flow distribution form in network.Load-equalizing switch is reduced due to only making data identification and forwarding purposes
Software and hardware complexity, decreases and correspondingly develops maintenance cost.
The above, is only presently preferred embodiments of the present invention, and any formal limitation is not made to the present invention, though
So the present invention is disclosed above with preferred embodiment, but is not limited to the present invention, any to be familiar with this professional technology people
Member, without departing from the scope of the present invention, when making a little change or modification using the technology contents of the disclosure above
Be the Equivalent embodiments of equivalent variations, as long as be without departing from technical solution of the present invention content, according to technical spirit of the invention,
Within the spirit and principles in the present invention, any simple modification, equivalent and improvement for being made to above example etc., still
Belong within the protection domain of technical solution of the present invention.
Claims (7)
1. a kind of load balancing apparatus based on SDN, it is characterised in that：It is equal comprising a load balancing controller and multiple loads
Weighing apparatus interchanger, multiple load-equalizing switch are connected that to set up openflow logical by its base plane with load balancing controller
Road, load balancing controller is used to shunt decision-making and load monitoring, load balancing control of the load-equalizing switch according to
The instruction that device is issued is parsed to data traffic and is forwarded or abandoned.
2. according to a kind of load balancing apparatus based on SDN described in claim 1, it is characterised in that：The load balancing is handed over
Three-level flow table is provided with changing planes, flow table is used separately in service traffics identification, and flow table one is used for the balanced forwarding of this equipment flow, stream
The flow that table two is used for InterWorking Equipment is forwarded.
3. according to a kind of load balancing apparatus based on SDN described in claim 2, it is characterised in that：The flow table one is negative
Carry balanced forward table, flow table item with data flow ID original positions in messages and length, data flow ID be match matching words
Section, Action fields are modification purpose Mac addresses, modification purpose Ip, output output port.
4. according to a kind of load balancing apparatus based on SDN described in claim 2, it is characterised in that：The flow table two is mutual
Connection forward table, flow table item is match matching fields with purpose ip, and action fields are acted for output, and output port is connection
The port of certain cascade load-equalizing switch.
5. a kind of usage right requires a kind of load balancing side based on SDN of the load balancing apparatus based on SDN described in 1
Method, it is characterised in that comprise the steps of：
Step one：Backend nodes ip is configured at the end of load balancing controller 1, load balancing controller 1 is first by all negative
Carry the packet out message modes that balanced interchanger issues the arp messages of encapsulation query node mac addresses, end segment after acquisition
Point mac addresses and port mapping relationship；Then load balancing controller is regularly by carrying icmp or snmp messages
Packet out message obtains the load weight of backend nodes, and in load balancing controller by the generation point of specific sort algorithm
The balanced group table of stream；
Step 2：Load-equalizing switch supports three-level flow table, by load balancing controller to load-equalizing switch flow table
Flow table item of the addition based on purpose ip forwardings in zero, destination address is that the bag that enters of the virtual ip of the machine jumps to flow table one, destination
Location is not that the bag that enters of the virtual ip of the machine jumps to flow table two, and packet in are packaged into if other messages such as messages such as arp, icmp
Information reporting load balancing controller, it is remaining, abandon；
Step 3：Message into flow table one matches flow table item, is forwarded by corresponding action instructions if hit, no
Message is then encapsulated into packet in information reporting load balancing controllers by hit, and load balancing controller is from loading sharing group
A low node of load is selected to be exported as message in table, construction FlowMod message issues flow table rule to flow table one；
Step 4：Message into flow table two matches flow table item first, hit, then forwarded by flow table action, does not order
In, then message is packaged into packet in information reporting load balancing controllers, controller according to the purpose IP address of message,
In conjunction with the whole network link topology of controller, the forward-path of the message is calculated, it is equal to the load on forward-path successively
Weighing apparatus issues the flow table item of flow table two.
6. according to a kind of load-balancing method based on SDN described in claim 5, it is characterised in that：Load balancing controller
Added on the basis of openflow 1.3.4 only support to L4 to match to the matching of payload parts with load-equalizing switch
Support, comprising specified matching payload skews and data length.
7. according to a kind of load-balancing method based on SDN described in claim 5, it is characterised in that：The load balancing is handed over
Change planes and inbound port packet be identified, the message of matching flow table rule is then operated by the action fields of flow table item,
The message being not hit by, then operated by the action that table miss are configured.
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| CN201710038089.4A CN106790656B (en) | 2017-01-19 | 2017-01-19 | SDN-based load balancing device and method thereof |
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Cited By (9)
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| CN107360273A (en) * | 2017-09-11 | 2017-11-17 | 深圳市茁壮网络股份有限公司 | A kind of domain name analytic method and device |
| CN107846445A (en) * | 2017-09-20 | 2018-03-27 | 南京邮电大学 | A kind of server load balancing method based on SDN |
| CN108512758A (en) * | 2018-03-07 | 2018-09-07 | 华为技术有限公司 | Message processing method, controller and forwarding unit |
| CN108540559A (en) * | 2018-04-16 | 2018-09-14 | 北京航空航天大学 | A kind of SDN controllers for supporting IPSec VPN load balancing |
| CN110417562A (en) * | 2018-04-26 | 2019-11-05 | 华为技术有限公司 | Method, controller and the device of installation rule |
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| CN112468408A (en) * | 2020-11-13 | 2021-03-09 | 中盈优创资讯科技有限公司 | SDN-based load balancing implementation method and device |
| CN112671713A (en) * | 2020-11-30 | 2021-04-16 | 山东电力工程咨询院有限公司 | SDN network data forwarding method, SDN switch, controller and system |
| CN112968978A (en) * | 2021-05-19 | 2021-06-15 | 南京烽火星空通信发展有限公司 | Internet traffic distribution method based on SDN technology |
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Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107360273A (en) * | 2017-09-11 | 2017-11-17 | 深圳市茁壮网络股份有限公司 | A kind of domain name analytic method and device |
| CN107846445A (en) * | 2017-09-20 | 2018-03-27 | 南京邮电大学 | A kind of server load balancing method based on SDN |
| CN108512758A (en) * | 2018-03-07 | 2018-09-07 | 华为技术有限公司 | Message processing method, controller and forwarding unit |
| US11546255B2 (en) | 2018-03-07 | 2023-01-03 | Huawei Technologies Co., Ltd. | Packet processing method, controller, and forwarding device |
| CN108512758B (en) * | 2018-03-07 | 2021-09-14 | 华为技术有限公司 | Message processing method, controller and forwarding equipment |
| CN108540559B (en) * | 2018-04-16 | 2020-12-18 | 北京航空航天大学 | SDN controller supporting IPSec VPN load balancing |
| CN108540559A (en) * | 2018-04-16 | 2018-09-14 | 北京航空航天大学 | A kind of SDN controllers for supporting IPSec VPN load balancing |
| CN110417562B (en) * | 2018-04-26 | 2021-01-29 | 华为技术有限公司 | Method, controller and device for installing rules |
| CN110417562A (en) * | 2018-04-26 | 2019-11-05 | 华为技术有限公司 | Method, controller and the device of installation rule |
| CN111800348A (en) * | 2019-04-09 | 2020-10-20 | 中兴通讯股份有限公司 | Load balancing method and device |
| CN112468408A (en) * | 2020-11-13 | 2021-03-09 | 中盈优创资讯科技有限公司 | SDN-based load balancing implementation method and device |
| CN112468408B (en) * | 2020-11-13 | 2023-10-03 | 中盈优创资讯科技有限公司 | SDN-based load balancing implementation method and device |
| CN112671713A (en) * | 2020-11-30 | 2021-04-16 | 山东电力工程咨询院有限公司 | SDN network data forwarding method, SDN switch, controller and system |
| CN112968978A (en) * | 2021-05-19 | 2021-06-15 | 南京烽火星空通信发展有限公司 | Internet traffic distribution method based on SDN technology |
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| CN106790656B (en) | 2019-12-31 |
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