CN110048956A - Internetwork link load control system - Google Patents
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- CN110048956A CN110048956A CN201910458227.3A CN201910458227A CN110048956A CN 110048956 A CN110048956 A CN 110048956A CN 201910458227 A CN201910458227 A CN 201910458227A CN 110048956 A CN110048956 A CN 110048956A
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- 230000005540 biological transmission Effects 0.000 claims description 5
- 238000006243 chemical reaction Methods 0.000 claims 1
- 238000013507 mapping Methods 0.000 description 8
- 238000000034 method Methods 0.000 description 6
- 238000012360 testing method Methods 0.000 description 6
- 230000008569 process Effects 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 230000036541 health Effects 0.000 description 3
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Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L47/00—Traffic control in data switching networks
- H04L47/10—Flow control; Congestion control
- H04L47/12—Avoiding congestion; Recovering from congestion
- H04L47/125—Avoiding congestion; Recovering from congestion by balancing the load, e.g. traffic engineering
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L61/00—Network arrangements, protocols or services for addressing or naming
- H04L61/09—Mapping addresses
- H04L61/25—Mapping addresses of the same type
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L61/00—Network arrangements, protocols or services for addressing or naming
- H04L61/45—Network directories; Name-to-address mapping
- H04L61/4505—Network directories; Name-to-address mapping using standardised directories; using standardised directory access protocols
- H04L61/4511—Network directories; Name-to-address mapping using standardised directories; using standardised directory access protocols using domain name system [DNS]
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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
- H04L63/02—Network architectures or network communication protocols for network security for separating internal from external traffic, e.g. firewalls
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- General Engineering & Computer Science (AREA)
- Data Exchanges In Wide-Area Networks (AREA)
Abstract
The embodiment of the invention discloses a kind of Internetwork link load control systems, include: domain name system DNS server, be deployed in Intranet, network level and intranet server network are reachable, it is connect with Intra-Network switch, the parsing link for DNS when controlling Intranet terminal access internet；Firewall is connect with Intra-Network switch, for controlling the access between Intranet and internet；Balancing link load component is connect with the firewall, for going out to traffic routing and network address translation NAT for Intranet whereabouts internet；At least two egress routers are connect with the balancing link load component, for connecting one to one with the Internet lines of at least two default operators.The technical solution of the embodiment of the present invention realizes balanced operator link load, improves the accuracy of traffic routing.
Description
Technical field
The present embodiments relate to Internet technology more particularly to a kind of Internetwork link load control systems.
Background technique
Enterprise campus realizes internet access by access telecom operators, and single telecom operators link cannot be fine
It satisfies the use demand.
When taking the two or more telecom operators of access, multichannel operator balancing link load can be related to
Problem.In the prior art, the domain name system (Domain Name System, DNS) directly provided using operator, link load
The routing ratio that different operators link is set in equilibrium, to realize flow load balance.
Since directly configuration uses public network DNS, the A of acquisition to record belonging to deviation and public network DNS in the scheme of the prior art
Operator.The weight of balancing link load is depended on to control in terms of controlling flow.It often will appear link bandwidth utilization in this way
Rate is not high, the problem for bringing access portion Internet resources ineffective.
Summary of the invention
The embodiment of the present invention provides a kind of Internetwork link load control system, to realize more telecom operators' link loads
Equilibrium improves the accuracy of traffic routing.
The embodiment of the invention provides a kind of Internetwork link load control systems, comprising:
Domain name system DNS server is deployed in Intranet, and network level and intranet server network are reachable, exchange with Intranet
Machine connection, the parsing link for DNS when controlling Intranet terminal access internet；
Firewall is connect with the Intra-Network switch, for controlling the access between Intranet and internet；
Balancing link load component is connect with the firewall, for Intranet whereabouts internet go out to traffic routing and
Network address translation (Network Address Translation, NAT)；
At least two egress routers are connect with the balancing link load component, for presetting operation at least two
The Internet lines of quotient connect one to one.
The embodiment of the present invention completes dns resolution by dns server, and balancing link load component controls routing, solves chain
Bandwidth availability ratio not high problem in road realizes more telecom operators' balancing link loads, improves the effect of the accuracy of traffic routing
Fruit.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the Internetwork link load control system in the embodiment of the present invention one；
Fig. 2 is the structural schematic diagram of the Internetwork link load control system in the embodiment of the present invention one；
Fig. 3 is the process schematic of the Intranet equipment progress domain name mapping in the embodiment of the present invention two；
Fig. 4 is the process schematic of the DNS routing policy in the embodiment of the present invention two；
Fig. 5 is the process schematic for going out to carry out strategy path selecting to service traffics in the embodiment of the present invention two；
Fig. 6 is the Intranet traffic routing control schematic diagram in the embodiment of the present invention two.
Specific embodiment
The present invention is described in further detail with reference to the accompanying drawings and examples.It is understood that this place is retouched
The specific embodiment stated is used only for explaining the present invention rather than limiting the invention.It also should be noted that in order to just
Only the parts related to the present invention are shown in description, attached drawing rather than entire infrastructure.
Embodiment one
Fig. 1 is the structural schematic diagram for the Internetwork link load control system that the embodiment of the present invention one provides, the present embodiment
The case where being applicable to operator's link that enterprise campus accesses two or more, accessing internet, which specifically wraps
It includes:
Domain name system DNS server 110 is deployed in Intranet, and network level and 150 network of intranet server are reachable, control
The parsing link of DNS when all terminal access internets of Intranet；
Firewall 120 is connect with Intra-Network switch 160, for controlling the access between Intranet and internet；
Balancing link load component 130 is connect with firewall 120, for going out to traffic routing for Intranet whereabouts internet
And network address translation NAT；
At least two egress routers 140, connect with balancing link load component 130, for presetting fortune at least two
The Internet lines of battalion quotient connect one to one.
Wherein, as shown in fig. 1, enterprise network has two egress routers 140, there is two the Internet lines accesses, different
Operator's bandwidth is different, and exemplary, the bandwidth of the first operator and the second operator is respectively 200M and 400M, and bandwidth ratio is
1:2.Operator provides a user respective DNS service address.It is exemplary, show what three operators of access provided in Fig. 2
The Internetwork link load control system of the Internet lines.The bandwidth of first operator, the second operator and third operator point
Not Wei 200M, 400M and 600M, bandwidth ratio be 1:2:3.
Optionally, balancing link load component 130, comprising: the first Layer2 switching unit 131, balancing link load equipment
132 and the second Layer2 switching unit 133；
Balancing link load equipment 132, outward by 131 connection outlet router 140 of the first Layer2 switching unit, inwardly
Firewall 120 is connected by the second Layer2 switching unit 133, for going out to traffic routing and network address translation NAT.Link is negative
Carrying equalizing equipment major function is to traffic routing.Firewall is responsible for the access control of Intranet and internet, realizes basic
Demand for security.
Optionally, intranet server 150 includes: isolated area (demilitarized zone, DMZ) application server 151,
For directly accessing internet in a manner of NAT under the policy control of dns server；Server proxy cluster 152, for for
Intranet of handling official business provides proxy surfing service.
Wherein, Intranet shows two regions in topology: office interior web area and isolated area (demilitarized
Zone, DMZ) region.DMZ area logic is directly connected to firewall, and interconnection can be directly accessed in a manner of NAT by policy control
Net.The external publication of DMZ regional deployment enterprise is applied, such as the business such as mailbox and portal website.Office Intranet needs to pass through generation
Equipment just accessible internet is managed, proxy server area is belonged to, which forms cluster by more proxy servers and provide generation
Manage service on net.The dns server that DMZ application server and server proxy cluster use is dedicated dns server.It should
Dns server controls the parsing for going to two operator DNSs, realizes the control of domain name mapping level in Intranet access internet traffic
System.Emphasis controls the weight control of domain name mapping by the DNS equipment of profession, then more optimized by balancing link load conceptual design
Routing policy so that the outbound that uses of data traffic more it is accurate effectively, so that access target business is more rapidly efficient.
The technical solution of the present embodiment completes dns resolution by dns server, and balancing link load component controls routing,
It solves the problems, such as that link bandwidth utilization rate is not high, realizes more telecom operators' balancing link loads, improve the accurate of traffic routing
The effect of property.
Wherein, the present embodiment focuses on to show the technical solution about Intranet DNS and balancing link load, so in topology
In show the topological sample of an enterprise network Internet exportation emphatically, intranet environment do not do excessive description.And have multiple mutual
Networking outlet, and bandwidth is all different.It should be noted that in actual scene, when enterprise selects operator's link, by
The factors such as place, rate and business influence, and each link bandwidth injustice of Intranet outlet belongs to universal phenomenon.This
Outside, Technical Design concern the going out to flow, for entering to flow, link load from Intranet access internet of the present embodiment
Balanced component 130 needs guarantee the requests from a certain operator, and operator link of the flow of reply also before use is
It can.
Embodiment two
The present embodiment further refines based on the above technical solution, wherein dns server is specifically used for: when connecing
The DNS request for receiving the Intranet request internet domain name of intranet server transmission, by DNS request according to default weight ratio to take turns
The mode of inquiry is forwarded to the public network DNS of default operator.
Wherein, dns server provides dns resolution service for server proxy cluster and DMZ application server, and Intranet is asked
The DNS request of internet domain name is asked to be forwarded to operator DNS by strategy scheduling.In concrete configuration: needing to enable intelligent load
Function configures the DNS view of all operators in Forward Area, and fills in weight ratio in view of the intelligent load to all operators
Value, for example, when the link of three operators of access, the bandwidth ratio of the first operator, the second operator and third operator is
1:2:3, then the view in this, as all operators fills in weight ratio, to press when realizing that domain name mapping selects operator DNS
It is parsed according to bandwidth weighting.Optionally, dns server is also used to mutual in the Intranet request for receiving intranet server transmission
Before the DNS request for domain name of networking, default weight ratio is determined according to the bandwidth of at least two default operators；Match in Forward Area
The DNS view of at least two default operators is set, and default weight ratio is filled in the DNS view of at least two default operators
Value.
As shown in figure 3, Intranet equipment carries out the process of domain name mapping, DMZ application server and agency first in Intranet
The equipment of domain name mapping is needed in server cluster, request message can be passed to the dns server of Intranet, dns server is again
By DNS request to the public network DNS of corresponding operator in the way of weight ratio poll, which is with the ratio of bandwidth
With reference to depending on, the parsing result of return can be preferably operator belonging to correspondence, reach the control need of this level of domain name mapping
It asks.
Balancing link load function mainly realizes that selection enterprises flow goes to a plurality of operation when internet in the system
The routing of quotient outlet and the mapping of public network address, wherein routing portion is more important, directly affects flow and final business
Access effect.It is controlled going out independently to branch away to the dns resolution of flow, so that strategy used in DNS query is more simplified
Efficiently.Remaining flow has the IP address library of different operators in such a way that destination address carries out routing in actual disposition,
The Target IP into flow needs to belong in the set of which IP in the judgement of this link out, and hit then selects corresponding chain
Road accesses.
Balancing link load component, is specifically used for:
When receiving the data packet of Intranet DNS domain name inquiry, the destination address in data packet is obtained；By destination address with
At least two first goal-selling address bases are matched, wherein the first goal-selling address base and default operator one are a pair of
It answers, the runner public-network DNS provided including corresponding default operator；If successful match, send data packets to corresponding default
The egress router of operator.
Wherein, as shown in figure 4, during DNS routing policy, when the data packet of Intranet DNS domain name inquiry reaches chain
When the load balancing component of road, the strategy can be hit, which can match data packet with the first goal-selling address base,
The runner public-network DNS that exactly operator is provided forms the first goal-selling address base, according to the target defined
Location is compared.In first goal-selling address base, Intranet DNS domain name is inquired and is transmitted by balancing link load component if hit
To corresponding egress router, to correctly pass to corresponding gateway.It is exemplary, the access of Internetwork link load control system
Three operators, then needing to configure three as gateway pond used in DNS routing, gateway pond and operator are corresponded, often
A gateway pond only has the gateway address of corresponding operator's link.Three carrier gateways are respectively corresponded in three gateway ponds
Location, but it is alternative without redundancy, that is, without the gateway address of other operators other than corresponding operator, the reason is that DNS
Flow cross operator access effect can be limited in actual scene or poor effect.
Optionally, balancing link load component is also used to:
When going out to traffic requests of receiving is non-DNS when going out to traffic requests, obtain out corresponding to traffic requests
Internal address；When internal address is that default internal address will be out according to the corresponding relationship of default internal address and default operator
The egress router of corresponding default operator is sent to traffic requests.
Internal address non-default for internal address obtains out destination address corresponding to traffic requests；By destination address
It is matched at least two second goal-selling address bases, wherein each second goal-selling address base includes according to default
The runner public-network DNS that the default operator of at least two of priority arrangement provides, and in each second goal-selling address base
The runner public-network DNS that the default operator of highest priority provides is all different；If successful match, will go out to traffic requests
It is sent to the egress router of corresponding default operator.
Internal address non-default for internal address, and go out to traffic requests default target address, call third to preset mesh
Address base is marked, determines default operator corresponding to traffic requests according to default weight ratio, wherein third goal-selling
Location library includes the runner public-network DNS that at least two default operators provide；It will go out to traffic requests and be sent to corresponding default fortune
Seek the egress router of quotient.
Wherein, as shown in figure 5, going out to carry out the process of strategy path selecting to service traffics, all of non-DNS go out to order to flow
In the strategy, entire routing is logically divided into three directions, for accessing three operators.First orientation preferentially judges Intranet
Address carries out routing according to internal address.Usual corporate intranet has specific business demand, then when specific Intranet equipment
When needing to access internet, it is necessary to use specific operator's link.Default internal address is exactly preset interior entoilage
The IP section of location, when internal address is matched with default internal address, just selection presets the corresponding operator's link of internal address with this.
Second direction is to be judged according to the second goal-selling address base, that is, the second goal-selling address base is to preset
Good operator's IP address library.Most flows select operator's link after hitting the strategy, in practical applications, preferentially
The operation link of selection will be placed on the position priority match of the part first.Third direction is default Rule of judgment, preceding two
The unmatched residue in a direction goes out that flow, the strategy will be executed, i.e., directly selects specific operator's net according to weight
It closes.Wherein in the strategy execution in second direction and third direction, corresponding goal-selling address base can be called, that is, in advance
First configured gateway pond, includes preferred operator and other operators in gateway pond, but the priority of other operators compared with
It is low, it will not select under normal circumstances.Only when the health examination of configuration judges just select its in same gateway pond after failure
Its carrier gateway.Exemplary, Internetwork link load control system accesses three operators, then needing to configure four gateways
Pond, wherein having one for default resource pond, the other three gateway pond and operator are corresponded.Gateway corresponding with operator pond
Respectively by the gateway address of corresponding operator's link preferably location, the gateway address of other two operator link is as standby
Choosing.It is redundancy backup configuration for the gateway that other operators are added in the corresponding gateway pond of an operator, when preferred gateway
When location is failed, it is ensured that flow selects other gateway access internets.The pond member in each gateway pond would generally be good for
Health inspection determines health examination failure, gateway pond can be allowed to judge priority, the other gateways for selecting priority low.
Optionally, balancing link load component is also used to:
It receives and stores the first goal-selling address base and/or the second goal-selling address base and/or third presets mesh
Mark address base.
Wherein it is possible to IP network section is good according to the preparatory reduction of format, batch importing is carried out, then be supported equalizing equipment
It is called.About the IP address library of operator, operator and link load manufacturer be with can providing operator IP in a practical situation
Location library, after collection, arrangement and test verifying, the IP address library of the operator finally used is more acurrate.It need to will only put in order
IP address library import balancing link load, and called in going out strategy to flow.
About above-mentioned test, due to the accuracy in the IP address library being collected into itself be not absolutely, can be with
Judge the IP address library of test whether preferably, at this by the monitoring of tools of third party's flow analysis in the actual environment
In embodiment, addition may have for the IP address library sample that the first operator make it is multiple, can all be uploaded to load
Weigh equipment, exemplary, is named as " ISP1_class_v1, ISP1_class_v2, ISP1_class_v3 ", is going out respectively to plan
It calls and tests in slightly, carry out traffic statistics and key network parameter index point by third-party flow analysis software or hardware
Analysis comparison, concern bandwidth, transmission control protocol (Transmission Control Protocol, TCP) settling time and average
The parameters such as delay.Wherein bandwidth is sentenced as the hit rate reference for measuring hit IP address library, TCP settling time and average delay
Whether cutout amount is preferred, and the lower usual TCP settling time and average delay the better.Finally preferred IP is selected according to test result
Address base is as the IP address library finally used.
Operator's IP address library have passed through screening test, so flow shoots straight on Match IP Address library, flow is visited
It asks more accurate.Batch imports IP address library, and rapidly batch IP sections of modifications, or the replacement in entire IP address library may be implemented.
As shown in fig. 6, in the Internetwork link load control system of the offer of the embodiment of the present invention, it will be in Intranet flow
DNS query flow and go out separately handled to service traffics, wherein the dns resolution of Intranet flow is independent to be controlled so that
Strategy used in DNS query is more simplified efficiently.It is selected out to service traffics according to IP address of internal network or destination address
The mode on road has the IP address library of different operators in actual disposition, and the Target IP into flow is needed in this ring out
Section judgement belongs in the set of which IP, and hit then selects corresponding link to access.And for not being not belonging to root
The Intranet flow that routing is carried out according to IP address of internal network and destination address, distributes according to default weight ratio to flow.Realize one
New and effective more telecom operators' balancing link load systems are covered, so that it is automatically superfluous that more telecom operators' links are better achieved
Cotangent changes, and realizes link dynamic load leveling, improves the accuracy of traffic routing mode.
Note that the above is only a better embodiment of the present invention and the applied technical principle.It will be appreciated by those skilled in the art that
The invention is not limited to the specific embodiments described herein, be able to carry out for a person skilled in the art it is various it is apparent variation,
It readjusts and substitutes without departing from protection scope of the present invention.Therefore, although being carried out by above embodiments to the present invention
It is described in further detail, but the present invention is not limited to the above embodiments only, without departing from the inventive concept, also
It may include more other equivalent embodiments, and the scope of the invention is determined by the scope of the appended claims.
Claims (9)
1. a kind of Internetwork link load control system characterized by comprising
Domain name system DNS server is deployed in Intranet, and network level and intranet server network are reachable, connects with Intra-Network switch
It connects, the parsing link for DNS when controlling Intranet terminal access internet；
Firewall is connect with the Intra-Network switch, for controlling the access between Intranet and internet；
Balancing link load component is connect with the firewall, for going out to traffic routing and network for Intranet whereabouts internet
Address conversion NAT；
At least two egress routers are connect with the balancing link load component, for at least two default operators
The Internet lines connect one to one.
2. Internetwork link load control system according to claim 1, which is characterized in that the balancing link load group
Part, comprising: the first Layer2 switching unit, balancing link load equipment and the second Layer2 switching unit；
The balancing link load equipment connects the egress router by the first Layer2 switching unit outward, inwardly
The firewall is connected by the second Layer2 switching unit, for going out to traffic routing and network address translation NAT.
3. Internetwork link load control system according to claim 1, which is characterized in that the dns server, specifically
For: when the DNS request for receiving the Intranet request internet domain name that the intranet server is sent, the DNS request is pressed
The public network DNS of default operator is forwarded in a manner of poll according to default weight ratio.
4. Internetwork link load control system according to claim 3, which is characterized in that the dns server is also used
Before the DNS request in the Intranet request internet domain name for receiving the intranet server transmission, according at least two
The bandwidth of a default operator determines the default weight ratio；At least two default operators are configured in Forward Area
DNS view, and the default weight ratio is filled in the DNS view of at least two default operators.
5. Internetwork link load control system according to claim 3 or 4, which is characterized in that the link load is equal
Weigh component, is specifically used for:
When receiving the data packet of Intranet DNS domain name inquiry, the destination address in the data packet is obtained；By the target
Location is matched at least two first goal-selling address bases, wherein the first goal-selling address base is preset with described
Operator corresponds, the runner public-network DNS provided including the correspondence default operator；It, will be described if successful match
Data packet is sent to the egress router of the corresponding default operator.
6. Internetwork link load control system according to claim 5, which is characterized in that the balancing link load group
Part is also used to:
When going out to traffic requests of receiving is non-DNS when going out to traffic requests, obtain it is described go out it is corresponding to traffic requests
Internal address；When the internal address is default internal address, according to the default internal address and the default operator
Corresponding relationship, by the egress router for being sent to the corresponding default operator to traffic requests out.
7. Internetwork link load control system according to claim 6, which is characterized in that the balancing link load group
Part is also used to:
When the non-default internal address of the internal address, obtain described out to the corresponding destination address of traffic requests；By institute
It states destination address to be matched at least two second goal-selling address bases, wherein each second goal-selling address
Library includes according to the runner public-network DNS of at least two default operators' offers of pre-set priority arrangement, and each institute
The runner public-network DNS for stating default operator's offer of highest priority in the second goal-selling address base is all different；
If successful match, by the egress router for being sent to the corresponding default operator to traffic requests out.
8. Internetwork link load control system according to claim 7, which is characterized in that the balancing link load group
Part is also used to:
When the non-default internal address of the internal address, and it is described go out to traffic requests default target address, call third
Goal-selling address base goes out according to described in the default weight ratio determination to the corresponding default operator of traffic requests,
Wherein, the third goal-selling address base includes the runner public-network DNS that at least two default operators provide；By institute
State out the egress router that the corresponding default operator is sent to traffic requests.
9. Internetwork link load control system according to claim 8, which is characterized in that the balancing link load group
Part is also used to:
Receive and store the first goal-selling address base and/or the second goal-selling address base and/or described
Three goal-selling address bases.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111683139A (en) * | 2020-06-05 | 2020-09-18 | 北京百度网讯科技有限公司 | Method and apparatus for balancing load |
| CN113765801A (en) * | 2020-07-16 | 2021-12-07 | 北京京东尚科信息技术有限公司 | Message processing method and device applied to data center, electronic equipment and medium |
| CN114070830A (en) * | 2021-11-02 | 2022-02-18 | 中国工商银行股份有限公司 | Internet agent single-arm deployment architecture and internet agent remote deployment system |
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