CN106878386A - A kind of load-balancing method and device - Google Patents
A kind of load-balancing method and device Download PDFInfo
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- CN106878386A CN106878386A CN201611270215.0A CN201611270215A CN106878386A CN 106878386 A CN106878386 A CN 106878386A CN 201611270215 A CN201611270215 A CN 201611270215A CN 106878386 A CN106878386 A CN 106878386A
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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
- H04L67/1036—Load balancing of requests to servers for services different from user content provisioning, e.g. load balancing across domain name servers
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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
- H04L61/2503—Translation of Internet protocol [IP] addresses
Abstract
The application provides a kind of load-balancing method and device, when user of the control module on the first business board migrates to the second business board, can be according to the corresponding second user group of the second business board, the accessing user for belonging to second user group is calculated for current accessing user, the corresponding user's list item of accessing user that second user group will be belonged in first user group afterwards is synchronized to second business board, obtain second user group list item, and control access board to refresh the corresponding accessing user of the second user group list item, so as to the flow for belonging to the accessing user of second user group be drained into processed on the second business board, therefore adjust automatically load effect is reached, and realize user's unaware, without packet loss.
Description
Technical field
The application is related to communication technical field, more particularly to a kind of load-balancing method and device.
Background technology
NAT (Network Address Translation, network address translation) is by the IP ground in IP datagram text head
Location is converted to the process of another IP address.When internal network accesses the message of external network by NAT device, NAT device
The source IP address in former message can be replaced with a legal public network address, is communicated with outer net.
CGN (Carrier Grade NAT, carrier-class NAT) is to dispose in the operator network, realizes a large number of users ground
The conversion of location.Therefore, requirements of the CGN to capacity, performance, reliability etc. is all significantly larger than tradition NAT.
The content of the invention
In view of this, the application a kind of load-balancing method and device are provided solve load balancing in the prior art cannot
The problem of dynamic adjustment.
Specifically, the application is achieved by the following technical solution:
The application provides a kind of load-balancing method, and methods described is applied to the control module in load balancing networking, institute
Stating also includes access board and more than one piece business board in load balancing networking, and methods described includes:
When the user on the first business board needs to migrate to the second business board, second business board corresponding the is obtained
Two user's groups;The accessing user for belonging to the second user group is calculated for current accessing user;
The corresponding user of accessing user of the second user group will be belonged in the corresponding first user group of first business board
List item is synchronized to second business board, obtains second user group list item, controls second business board by second user group table
Item is issued to hardware;
When the second user group list item issues completion, control access board refreshes the corresponding user's group of accessing user, with
The flow of the accessing user for belonging to second user group is set to drain on the second business board.
Based on identical design, present invention also provides a kind of load balancing apparatus, described device is applied to load balancing
Control module in networking, also includes access board and more than one piece business board in the load balancing networking, described device includes:
User's computing unit, for when the user on the first business board needs to migrate to the second business board, obtaining described
The corresponding second user group of second business board;The access use for belonging to the second user group is calculated for current accessing user
Family;
List item synchronization unit, for connecing for the second user group will to be belonged in the corresponding first user group of the first business board
The corresponding user's list item of access customer is synchronized to second business board, obtains second user group list item, controls second business
Second user group list item is issued to hardware by plate;
List item refresh unit, uses for when the second user group list item issues completion, control access board to refresh to access
The corresponding user's group in family, so that the flow for belonging to the accessing user of second user group is drained on the second business board.
As can be seen here, when user of the control module of the application on the first business board migrates to the second business board, can be with
According to the corresponding second user group of the second business board, the access use for belonging to second user group is calculated for current accessing user
Family, the corresponding user's list item of accessing user that will belong to second user group in first user group afterwards is synchronized to second business
Plate, obtains second user group list item, and controls access board to refresh the corresponding accessing user of the second user group list item, so that category
Drained into the flow of the accessing user of second user group and processed on the second business board, therefore reach adjust automatically load effect,
And user's unaware is realized, without packet loss.
Brief description of the drawings
Fig. 1 is the CGN plate portions administration schematic diagram in a kind of illustrative embodiments of the application;
Fig. 2 is a kind of process chart of the load-balancing method in a kind of illustrative embodiments of the application;
The deployment schematic diagram of the newly-increased CGN plates in a kind of illustrative embodiments of Fig. 3 a the application;
A kind of load balancing interaction diagrams in a kind of illustrative embodiments of Fig. 3 b the application;
The hardware structure diagram where load balancing apparatus in a kind of illustrative embodiments of Fig. 4 a the application;
A kind of building-block of logic of the load balancing apparatus in a kind of illustrative embodiments of Fig. 4 b the application.
Specific embodiment
Fig. 1 is referred to, a kind of CGN plate portions administration schematic diagram in the embodiment of the present application, including the business of connection public network
Plate, i.e. CGN plates, and connect the access board of private network, i.e. BRAS access boards, wherein business board and access board deployment in Fig. 1
Position is logical place, and business board and access board can be deployed on same veneer in practical application, it is also possible to difference portion
On different veneers, the switching network in Fig. 1 is the exchange network that business board and access board are internally formed, and it is used to realize business for administration
Information exchange between plate, access board.Private network carries out address conversion between public network by disposing CGN plates.Due to one
Can only configure authorized user's group under domain, therefore when there is a large number of users to be reached the standard grade under authorized user's group at the business of carrying out
During reason, the flow of different user can only be processed by current business plate, can be to causing very big burden when foreboard.So working as
Preceding operator generally needs deployment polylith CGN plates to realize load balancing, and access board is used to instruct flow to be sent to different CGN
Plate, high-volume conversation is set up to avoid accessing user from concentrating on certain block CGN plates, certain block CGN plates excess load occurs and other CGN plates
Still there is the remaining situation of ample resources.
Current CGN plate load balancing, typically configures multiple user's group modes by domain, and user can basis after reaching the standard grade
The quantity of user in different groups, is added in the minimum user's group of number of users, and the flow of the user can just be assigned to corresponding
Processed in CGN examples, so as to realize that multiple CGN example loads are shared.
After realizing load balancing, when number of users is more and more so that during dilatation, can be based on being inserted on the basis of former load
Enter new CGN plates, but need that user is all offline just to redeploy after inserting new CGN plates, or new user is continued all
It is sent on new CGN plates until load balancing.The load balancing effect that so can not have all reached.
In order to solve the problems, such as prior art, the application provides a kind of load-balancing method and device, control module
When user on the first business board migrates to the second business board, can be according to the corresponding second user group of the second business board, pin
The accessing user for belonging to second user group is calculated to current accessing user, will belong to second user in first user group afterwards
The corresponding user's list item of accessing user of group is synchronized to second business board, obtains second user group list item, and controls to access
The corresponding accessing user of the new second user group list item of scrubbing brush, so as to belong to the flow drainage of the accessing user of second user group
Processed on to the second business board, therefore reach adjust automatically load effect, and realize user's unaware, without packet loss.
Fig. 2 is refer to, is a kind of process chart of the load-balancing method in a kind of illustrative embodiments of the application,
Methods described is applied to the control module in load balancing networking, and access board and more than one piece are also included in the load balancing networking
Business board, the business board can be CGN plates, wherein every piece of business board has been respectively configured corresponding user's group, the wherein control
Module can be the master control borad in the load balancing networking, or the control plane in each business board, the control module
Can be communicated with each business board and access board by control passage, such as that is sent on reception business board and access board is logical
Know, or control instruction etc. is issued to business board and access board, the method includes in the present embodiment:
Step 201, when the user on the first business board needs to migrate to the second business board, obtain second business board
Corresponding second user group;The accessing user for belonging to the second user group is calculated for current accessing user;
In the present embodiment, when the user on the first business board needs to migrate to existing second business board, or second
When business board is newly inserted, the user on first business board then needs to migrate to the second business board, then when on the first business board
User needs to migrate during to the second business board, and control module can obtain the corresponding second user group of second business board, should
Second user group can be in advance for second business board is configured, or is finding the user's needs on the first business board
Migrate to the second business board, be the configuration of the second business board;Then calculated for current accessing user and belong to described
The accessing user of two user's groups.It should be noted that first business board, the second business board are only used for distinguishing different business
The title of plate, the first business board and the second business board can be exchanged.
Wherein in a kind of embodiment, it is corresponding that second user group can be added to the first business board by control module first
In load balancing group where first user group, load balancing calculating then is carried out for current accessing user, for example, control
Module will be currently accessed user and carry out HASH calculating according to preset rules, obtain the corresponding accessing user of the second user group.
The preset rules can include being calculated according to allocation proportion according to User Identity, wherein so-called allocation proportion is
The allocation proportion of the ratio of finger different business plate load traffic, such as original business board 1 and business board 2 is 1:2, Insert service
After plate 3, allocation proportion is assumed to be adjusted to 1:2:3, then the allocation proportion after needing according to adjustment carries out load balancing;So-called use
Family identity has uniqueness, can specifically include hardware identifier, such as MAC Address, it is also possible to including software identification, for example
Session id, above-mentioned User Identity be may be used alone, can also be used in combination, and the application is not limited.
Therefore the application can by for the second business board configure user's group method when the second business board is inserted to ought
Preceding accessing user re-starts dynamic load leveling adjustment.Wherein, it is currently accessed when user refers to the second business board of insertion and has connect
The user for entering.
Step 202, the accessing user couple of the second user group will be belonged in the corresponding first user group of the first business board
The user's list item answered is synchronized to second business board, obtains second user group list item, controls second business board by second
User's group list item is issued to hardware;
After recalculating, the part accessing user in first user group can be shared in second user group treatment,
And the user's list item in current second user group also without these accessing users, so-called user's list item is exactly service guidance plate pair
Accessing user carries out NAT conversions.Therefore in the present embodiment, connecing for the second user group can will be belonged in first user group
The corresponding user's list item of access customer is synchronized to second business board, so as to obtain second user group list item, specifically, control
The accessing user that module can belong to the second user group in first user group sets mark, such as labeled as modification, then
The corresponding user's list item of the accessing user for being will be marked to be synchronized in the second business board in first user group, so that second
Business board obtains the corresponding second user list item of accessing user.Control module controls second business board by described second afterwards
User's group list item is issued in the hardware of second business board, for instructing the hardware to carry out Business Processing, second business board
After second user group list item is issued into hardware, completion notice can be fed back to control module.
Step 203, when the second user group list item issues completion, control access board refreshes the corresponding use of accessing user
Family group, so that the flow for belonging to the accessing user of second user group is drained on the second business board.
When control module receives the completion notice of second business board feedback, it may be determined that distributed under second user list item
Into, due in access board the corresponding user's group of accessing user (namely in access board record to the corresponding use of accessing user
Family group is identified) also refreshed not according to the user's group result for recalculating, so that control module can further control to access
The corresponding user's group of scrubbing brush new access user, so that the flow for belonging to the accessing user of second user group drains into the second business board
On.
As one embodiment, in the corresponding user's group of access board refreshing accessing user, can realize that second will be belonged to
The flow of the accessing user of user's group is drained on the second business board.Specifically, access board be able to will be belonged to by drainage rule
Drained into the accessing user of user's group and processed on the corresponding business board of the user's group.For example, if thering are 300 to connect originally
Access customer is processed by business board 1, business board 2 respectively, and wherein access board can connect No. 1-150 according to drainage rule
The customer flow of access customer drained into and processed on business board 1, and the customer flow of 151-300 accessing users is drained into business
Processed on plate 2;When a business board 3 is increased newly, it is assumed that after according to load balancing again, the group result for obtaining is:1-
No. 100 accessing users are processed by business board 1;201-300 accessing users are processed by business board 2;And No. 101-151-200
Accessing user is then processed by business board 3, and the load balancing result is merely illustrative, and specific load balancing result is by actual feelings
Depending on condition;Due to there is no the corresponding user's group 3 of business board 3 in the user's group of the record of access board before, therefore it is determined that business board 3
After being synchronized user's list item of 101-151-200 accessing users, access board can refresh the corresponding use of accessing user
Family group, processed on business board 3 so as to the customer flow of 101-151-200 accessing users be drained into.Therefore the application can
With by way of updating drainage after first synchronization list item, it is ensured that the not packet loss during load balancing adjustment, and user's unaware.
As can be seen here, when user of the control module of the application on the first business board migrates to the second business board, can be with
According to the corresponding second user group of the second business board, the access use for belonging to second user group is calculated for current accessing user
Family, the corresponding user's list item of accessing user that will belong to second user group in first user group afterwards is synchronized to second business
Plate, obtains second user group list item, and controls access board to refresh the corresponding accessing user of the second user group list item, so that category
Drained into the flow of the accessing user of second user group and processed on the second business board, therefore reach adjust automatically load effect,
And user's unaware is realized, without packet loss.
In the one of embodiment of the application, after the completion of access board renewal, due to belonging to the access of second user group
The corresponding user's group list item of user has been synchronized in the second business board, and these accessing users can also be drained into by access board
Processed in two business boards, therefore control module can control the first business board to belong to the accessing user couple of the second user group
The user's group list item answered is deleted, so that the first business board deletes the user list item unrelated with own service, is further saved
Memory space.
In the one of embodiment of the application, control module can also set the synchronous state and same of starting on access board
Step completion status;And before the accessing user for belonging to the second user group is calculated for current accessing user, mark
It is designated as synchronously starting state;After control access board refreshes the corresponding user's group of accessing user, labeled as synchronous done state.Tool
For body, the synchronization starts state and synchronously completing state can use 1,0 to mark.
When reception user reaches the standard grade request, control module first judges current state, if starting state in synchronous, controls institute
The request of reaching the standard grade that access board is not responding to accessing user is stated, when synchronous done state is reached, treatment user reaches the standard grade request;Further
When receiving user offline and asking, control module still first judges current state, if in synchronously starting state, control institute
State access board first to be cached when the offline request of accessing user is received, when synchronous done state is reached, it is allowed to which that is asked connects
Access customer is offline.Therefore can ensure in synchronizing process, accessing user's quantity is constant, so as to not interfere with the calculating of load balancing
As a result.
For the object, technical solution and advantage for making the application become more apparent, the scheme to the application is made into one below
Step ground is described in detail.
Networking based on Fig. 1, it is assumed that 30000 users are calculated as the He of user's distributing user group 1 after reaching the standard grade by load balancing
User's group 2, wherein user's group 1 and user's group 2 drain into business board CGN1, CGN2 and realize load balancing respectively;Due to CGN1 and
CGN2 has now been in pressing force threshold point, therefore increases CGN3 in networking, and the networking structure after addition is as shown in Figure 3 a;Addition
, it is necessary to carry out load balancing adjustment after CGN3, the interaction flow of specific load balancing as shown in Figure 3 b, including step:
When step 301, control module detect the CGN3 of new access, it be in advance the user's group 3 of CGN3 configurations to obtain, and turns step
Rapid 302;
Step 302, user's group 3 is added in user's group 1 and the original load balancing group of user's group 2 to being currently accessed use
Family carries out HASH calculating, obtains belonging to the accessing user of user's group 3, goes to step 303;
In this example, it is assumed that load balancing result belongs to user's group 1 for 1-15000 user;15001-
No. 30000 users belong to user's group 2;After recalculating, new is grouped into:5001-15000 user belongs to user's group
1;15001-25000 user belongs to user's group 2;1-5000 and 25001-30000 user belong to user's group 3;
Step 303, the accessing user of user's group 3 will be belonged in user's group 1 and user's group 2 labeled as modification, gone to step
304;
Step 304, the corresponding user's list item of accessing user that will be labeled as changing be synchronized to CGN3, go to step 305;
Step 305, synchronous user's list item recorded the user's group list item of CGN3, and user's group list item is issued to
Hardware simultaneously notifies control module, goes to step 306;
Step 306, control module control access board refresh the corresponding user's group of accessing user, go to step 307;
In the present embodiment, access board refreshes the corresponding user's group of accessing user according to new packet, makes i.e. 5001-
No. 15000 users belong to user's group 1;15001-25000 user belongs to user's group 2;1-5000 and 25001-
No. 30000 users belong to user's group 3, so that 1-5000 and No. 25001 user drains into CGN3 treatment.
Step 307, CGN1 and CGN2 mark the accessing user for being in deleting user's group 1 and user's group 2, and terminate.
Therefore the application can realize the dynamic adjustment of load balancing, and not influence the treatment of customer service, improve system
System adaptability.
Based on identical design, the application also provides a kind of load balancing apparatus, and the device can be realized by software,
Can be realized by way of hardware or software and hardware combining.As a example by implemented in software, the load balancing apparatus conduct of the application
Device on one logical meaning, is to be read corresponding computer program instructions in memory by the CPU of device where it
Operation afterwards is formed.
Fig. 4 a are refer to, is a kind of load balancing apparatus 400 in a kind of illustrative embodiments of the application, the load
Sharing also includes access board and more than one piece business board in networking, and the basic running environment of the device includes CPU, memory and its
His hardware, from logic level, the logical construction of the device 400 as shown in Figure 4 b, including:
User's computing unit 401, for when the user on the first business board needs to migrate to the second business board, obtaining institute
State the corresponding second user group of the second business board;The access for belonging to the second user group is calculated for current accessing user
User;
List item synchronization unit 402, for the second user group will to be belonged in the corresponding first user group of the first business board
The corresponding user's list item of accessing user be synchronized to second business board, obtain second user group list item, control described second
Second user group list item is issued to hardware by business board;
List item refresh unit 403, for when the second user group list item issues completion, control access board to refresh access
The corresponding user's group of user, so that the flow for belonging to the accessing user of second user group is drained on the second business board.
Wherein in one embodiment, user's computing unit 401, specifically for the second user group is added to
In the corresponding load balancing group of first user group, HASH calculating is carried out according to preset rules to current accessing user, obtain institute
State the corresponding accessing user of second user group.
Wherein in one embodiment, the list item synchronization unit 402 is described specifically for will belong in first user group
The accessing user of second user group sets mark;The corresponding user's list item of accessing user that mark will be set in first user group is same
Walk in the second business board.
Wherein in one embodiment, described device also includes, synchronous control unit 404, for being set on access board
Synchronously start state and synchronously complete state;The access that belongs to the second user group is being calculated for current accessing user
Before user, state is started labeled as synchronous;After control access board refreshes the corresponding user's group of accessing user, labeled as synchronization
Done state;When state is started in the synchronization, the access board is controlled to be not responding to the request of reaching the standard grade of accessing user.
Wherein in one embodiment, the synchronous control unit 404 is additionally operable to starting state in the synchronization,
The access board is controlled first to be cached when the offline request of accessing user is received;When the synchronous done state is reached, it is allowed to
The accessing user is offline.
As can be seen here, when user of the control module of the application on the first business board migrates to the second business board, can be with
According to the corresponding second user group of the second business board, the access use for belonging to second user group is calculated for current accessing user
Family, the corresponding user's list item of accessing user that will belong to second user group in first user group afterwards is synchronized to second business
Plate, obtains second user group list item, and controls access board to refresh the corresponding accessing user of the second user group list item, so that category
Drained into the flow of the accessing user of second user group and processed on the second business board, therefore reach adjust automatically load effect,
And user's unaware is realized, without packet loss.
The function of unit and the implementation process of effect correspond to step in specifically referring to the above method in said apparatus
Implementation process, will not be repeated here.
For device embodiment, because it corresponds essentially to embodiment of the method, so related part is referring to method reality
Apply the part explanation of example.Device embodiment described above is only schematical, wherein described as separating component
The unit of explanation can be or may not be physically separate, and the part shown as unit can be or can also
It is not physical location, you can with positioned at a place, or can also be distributed on multiple NEs.Can be according to reality
Selection some or all of module therein is needed to realize the purpose of application scheme.Those of ordinary skill in the art are not paying
In the case of going out creative work, you can to understand and implement.
The preferred embodiment of the application is the foregoing is only, is not used to limit the application, all essences in the application
Within god and principle, any modification, equivalent substitution and improvements done etc. should be included within the scope of the application protection.
Claims (10)
1. a kind of load-balancing method, it is characterised in that methods described is applied to the control module in load balancing networking, described
Also include access board and more than one piece business board in load balancing networking, methods described includes:
When the user on the first business board needs to migrate to the second business board, obtain second business board corresponding second and use
Family group;The accessing user for belonging to the second user group is calculated for current accessing user;
The corresponding user's list item of accessing user of the second user group will be belonged in the corresponding first user group of first business board
Second business board is synchronized to, second user group list item is obtained, second business board is controlled by under second user group list item
It is sent to hardware;
When the second user group list item issues completion, control access board refreshes the corresponding user's group of accessing user, so that category
Drained on the second business board in the flow of the accessing user of second user group.
2. method according to claim 1, it is characterised in that described being calculated for current accessing user belongs to described
The accessing user of second user group, specifically includes:
The second user group is added in the corresponding load balancing group of first user group, to current accessing user according to pre-
If rule carries out HASH calculating, the corresponding accessing user of the second user group is obtained.
3. method according to claim 1, it is characterised in that belong in the corresponding first user group by the first business board
Second business board is synchronized in the corresponding user's list item of the accessing user of second user group, is specifically included:
The accessing user that the second user group will be belonged in first user group sets mark;
The corresponding user's list item of accessing user that mark will be set in first user group is synchronized to the second business board.
4. method according to claim 1, it is characterised in that methods described also includes:
Set on access board and synchronously start state and synchronously complete state;
Before the accessing user for belonging to the second user group is calculated for current accessing user, start labeled as synchronous
State;
After control access board refreshes the corresponding user's group of accessing user, labeled as synchronous done state;
When state is started in the synchronization, the access board is controlled to be not responding to the request of reaching the standard grade of accessing user.
5. method according to claim 4, it is characterised in that methods described also includes:
When state is started in the synchronization, the access board is controlled first to be cached when the offline request of accessing user is received;
When the synchronous done state is reached, it is allowed to which the accessing user is offline.
6. a kind of load balancing apparatus, it is characterised in that described device is applied to the control module in load balancing networking, described
Also include access board and more than one piece business board in load balancing networking, described device includes:
User's computing unit, for when the user on the first business board needs to migrate to the second business board, obtaining described second
The corresponding second user group of business board;The accessing user for belonging to the second user group is calculated for current accessing user;
List item synchronization unit, the access for will belong to the second user group in the corresponding first user group of the first business board is used
The corresponding user's list item in family is synchronized to second business board, obtains second user group list item, and control second business board will
Second user group list item is issued to hardware;
List item refresh unit, for when the second user group list item issues completion, control access board to refresh accessing user couple
The user's group answered, so that the flow for belonging to the accessing user of second user group is drained on the second business board.
7. device according to claim 6, it is characterised in that
User's computing unit, specifically for the second user group is added into the corresponding load balancing group of first user group
In, HASH calculating is carried out according to preset rules to current accessing user, obtain the corresponding accessing user of the second user group.
8. device according to claim 6, it is characterised in that
The list item synchronization unit, the accessing user specifically for will belong to the second user group in first user group sets mark
Note;The corresponding user's list item of accessing user that mark will be set in first user group is synchronized in the second business board.
9. device according to claim 6, it is characterised in that described device also includes:
Synchronous control unit, synchronously starts state and synchronously completes state for the setting on access board;Connect for current
Before access customer calculates the accessing user for belonging to the second user group, state is started labeled as synchronous;In control access board
After refreshing the corresponding user's group of accessing user, labeled as synchronous done state;When state is started in the synchronization, institute is controlled
State the request of reaching the standard grade that access board is not responding to accessing user.
10. device according to claim 9, it is characterised in that
The synchronous control unit, is additionally operable to starting state in the synchronization, controls the access board receiving access use
First cached during the offline request at family;When the synchronous done state is reached, it is allowed to which the accessing user is offline.
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Cited By (4)
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CN107733808A (en) * | 2017-11-20 | 2018-02-23 | 新华三技术有限公司 | A kind of flow transmission method and device |
CN108306998A (en) * | 2018-01-24 | 2018-07-20 | 新华三技术有限公司 | Method for network address translation and device |
CN110086727A (en) * | 2019-04-30 | 2019-08-02 | 新华三技术有限公司 | Load sharing method and device between a kind of CGN plate |
CN114938351A (en) * | 2022-06-13 | 2022-08-23 | 中国电信股份有限公司 | Flow regulation and control method and device |
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